CN110963385B - Motor operation monitoring method and device for traction drive elevator - Google Patents
Motor operation monitoring method and device for traction drive elevator Download PDFInfo
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- CN110963385B CN110963385B CN201911378256.5A CN201911378256A CN110963385B CN 110963385 B CN110963385 B CN 110963385B CN 201911378256 A CN201911378256 A CN 201911378256A CN 110963385 B CN110963385 B CN 110963385B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
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Abstract
The invention discloses a motor operation monitoring method and a device for a traction drive elevator, wherein the method comprises the following steps: s1, monitoring the running state of a target elevator and a vibration signal on a hoisting rope in real time; s2, performing frequency domain analysis on the monitored vibration signals, obtaining the state of the vibration signals on the hoisting rope according to the frequency domain analysis result and judging the running state of the motor; and S3, judging whether a fault state that the motor does not stop running when the traction rope slips on the traction sheave exists or not according to the monitored running state of the elevator, the state of the vibration signal on the traction rope and the running state of the motor. The method has the advantages of simple implementation method, low cost, high monitoring efficiency and precision and the like, and can realize intelligent monitoring of the fault state that the motor does not stop running when the traction rope slips on the traction sheave.
Description
Technical Field
The invention relates to the technical field of traction drive type elevators, in particular to a motor operation monitoring method and device for a traction drive type elevator.
Background
The following situations may occur during operation of a traction drive elevator: when the elevator car moves downwards, if the counterweight is blocked by the barrier and the motor does not stop running, the stress of a traction rope from the traction wheel to the counterweight is increased, and finally the traction rope slips on the traction wheel; similarly, if the car is blocked by the obstacle and the motor does not stop running when the counterweight moves downwards, the traction rope from the traction sheave to the car is increasingly stressed, and finally the traction rope slips on the traction sheave, namely, a fault state that the car or the counterweight stops due to the obstacle and the motor does not stop when moving downwards occurs, and the fault state influences the safety and reliability of the elevator operation.
However, in the prior art, the operation of the motor of the traction-drive elevator is usually controlled by only directly arranging the motor operation time limiter, the motor operation time limiter controls and limits the start and stop of the motor, the motor operation time limiter can only realize the motor operation limitation in a fixed time setting mode, and a fault state that the traction rope slips on the traction sheave due to the stopping of the elevator car or the counterweight due to an obstacle when the elevator car or the counterweight moves downwards cannot be identified, so that the motor cannot be timely controlled to stop when the traction rope slips on the traction sheave, the safe and reliable operation of the elevator is affected, and the requirements of the current elevator manufacturing and installation safety standard cannot be met. Therefore, it is urgently needed to provide a motor operation monitoring method suitable for a traction drive elevator, so that a fault state that a traction rope slips on a traction sheave due to stopping of an obstacle when a car or a counterweight moves downwards can be timely and accurately monitored, and the motor does not stop is simultaneously detected, so that the operation of the motor is controlled and limited when a fault occurs in time, and the safety and reliability of the operation of the elevator are improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides the motor operation monitoring method and the motor operation monitoring device for the traction drive elevator, which have the advantages of simple realization method, low cost, high monitoring efficiency and high monitoring precision, and can realize the intelligent monitoring of the fault state that the motor does not stop running when a traction rope slips on a traction sheave.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a motor operation monitoring method for a traction drive elevator, comprising the steps of:
s1, data monitoring: monitoring the running state of a target elevator and a vibration signal on a hoisting rope in real time;
s2, data analysis: performing frequency domain analysis on the vibration signal monitored in the step S1, obtaining the state of the vibration signal on the hoist rope and judging the running state of the motor according to the frequency domain analysis result;
s3, judging a fault state: and judging whether a fault state that the motor does not stop running when the traction rope slips on the traction sheave exists or not according to the monitored running state of the elevator, the state of the vibration signal on the traction rope and the running state of the motor.
Further, in the step S1, the acceleration data of the car is monitored to determine the running state of the elevator, and the vibration signals from the hoisting machine to the first hoisting rope portion of the car and from the hoisting machine to the second hoisting rope portion of the counterweight are monitored respectively.
Further, in step S2, the operation state of the motor is determined by determining whether the hoist rope is superimposed with vibration generated by operation of the motor and/or vibration generated by operation of the traction sheave according to the frequency domain analysis result, and the specific steps are as follows: and carrying out frequency domain analysis on a vertical direction signal in the vibration signal on the traction rope to obtain a plurality of frequency components, respectively comparing each frequency component with the motor pulse frequency and the traction sheave rotation frequency, if the difference between the frequency component and the motor pulse frequency and/or the traction sheave rotation frequency is within a specified range, judging that the traction rope is superposed with the vibration generated by the motor running and/or the traction sheave rotation frequency, and judging that the motor is in a running state, wherein the motor pulse frequency is the corresponding pulse frequency when the motor runs.
Further, in the step S3, if it is determined that the first characteristic that the running speed and the displacement of the elevator tend to 0 are satisfied, the second characteristic that the horizontal vibration signal from the hoisting machine to the first hoisting rope section of the car and/or from the hoisting machine to the second hoisting rope section of the counterweight exceeds the preset threshold value is satisfied, and the third characteristic that the motor is in the running state is satisfied, and the duration of the first characteristic, the second characteristic, and the third characteristic exceeds the preset threshold value, it is determined that the motor is not stopped when the traction rope slips on the traction sheave; the third characteristic is specifically that the hoisting rope is superposed with vibration generated by the operation of a motor and/or vibration generated by the operation of a traction sheave.
Further, after step S3, a fault location step is further included, and the specific steps are as follows: the method comprises the steps of judging the relaxation states of a first traction rope section and a second traction rope section according to horizontal vibration signals from a traction machine to the first traction rope section of a lift car and from the traction machine to the second traction rope of a counterweight respectively, and judging whether the current slipping of the traction rope on a traction wheel is caused by the lift car or the counterweight being blocked by an obstacle according to the judgment result.
Further, the step of determining the relaxation states of the first hoisting rope segment and the second hoisting rope segment includes: judging whether the vibration frequency of the horizontal direction vibration signal in the first traction rope section is greater than the vibration frequency of the horizontal direction vibration signal in the second traction rope section and/or whether the vibration amplitude of the horizontal direction vibration signal in the first traction rope section is smaller than the vibration amplitude of the horizontal direction vibration signal in the second traction rope section, if so, judging that the current slipping of the traction rope on the traction sheave is caused by the fact that the elevator car is blocked by an obstacle, otherwise, judging that the current slipping of the traction rope is caused by the fact that the counterweight is blocked by the obstacle.
Further, before the step S1, a parameter calibration step of calibrating a parameter threshold value for determining an operation state of the elevator and a state of a vibration signal on the hoist rope is further included, where the parameter calibration step includes: the method comprises the steps of collecting acceleration data of a car and a hauling rope in the static and normal running processes of a target elevator, calculating vibration characteristics of the car and the hauling rope in each landing when the target elevator runs according to the collected acceleration data, and counting a plurality of vibration characteristics obtained through calculation to form a corresponding vibration characteristic threshold value for judging the running state of the elevator and judging the state of a vibration signal on the hauling rope.
A motor operation monitoring apparatus for a traction drive elevator, comprising:
the data monitoring module is used for monitoring the running state of the elevator and a vibration signal on the hoisting rope in real time;
the data analysis module is used for carrying out frequency domain analysis on the vibration signals monitored by the data monitoring module, obtaining the state of the vibration signals on the hoisting rope according to the frequency domain analysis result and judging the running state of the motor;
and the fault state determination module is used for determining whether a fault state that the motor does not stop running when the traction rope slips on the traction sheave exists or not according to the monitored running state of the elevator, the state of the vibration signal on the traction rope and the running state of the motor.
Furthermore, the data monitoring module comprises a first detection unit for monitoring the motion state of the car, a second detection unit for monitoring a vibration signal from the traction machine to a first traction rope section of the car, and a third detection unit for monitoring a vibration signal from the traction machine to a second traction rope section of the counterweight, wherein the first detection unit is arranged on the car, the second detection unit is arranged on the first traction rope section, and the third detection unit is arranged on the second traction rope section.
Further, the device also comprises an alarm unit connected with the fault state determination module and used for sending an alarm signal and/or fault data when the fault state determination module determines that a fault state that the motor does not stop running when the traction rope slips on the traction sheave exists.
Compared with the prior art, the invention has the advantages that:
1. the invention relates to a motor operation monitoring method and a device for dragging and driving an elevator, which carry out frequency domain analysis by monitoring the operation state of the elevator and a vibration signal on a dragging rope in real time, synthesize the operation state of the elevator, the state of the vibration signal on the dragging rope and the operation state of a motor by frequency domain analysis results, finally judge whether a fault state that the motor does not stop running exists when the dragging rope slips on a dragging wheel, can realize intelligent monitoring of the operation state of the motor by fully utilizing the characteristics of the fault state that the motor does not stop when an obstacle stops when a car or a counterweight moves downwards, and can carry out alarm and other processing in time when the dragging rope slips on the dragging wheel, therefore, the safety and reliability of the elevator operation are effectively improved, and the requirements of the current elevator manufacturing and installation safety standard are met.
2. The invention relates to a motor operation monitoring method and a device for a traction drive elevator, which further analyze the vertical vibration signals collected on a traction rope by frequency spectrum analysis to analyze each vibration signal superposed on the traction rope, and can quickly and accurately judge whether the traction rope is superposed with the vibration of a motor and/or a traction sheave, thereby determining whether the motor stops running.
3. The invention relates to a motor operation monitoring method and a device for a traction drive elevator, which can accurately and quickly identify the fault state that the traction rope slips on a traction sheave and the motor does not stop running by further comprehensively judging whether the speed of the up-and-down running of a lift car approaches zero, detecting that the horizontal vibration on the traction rope exceeds a set threshold value and simultaneously superposing the vibration generated by the running of the motor and/or the traction sheave by the vertical vibration of the traction rope.
4. The invention relates to a motor operation monitoring method and a device for a traction drive elevator, which further judge the relaxation states of a first traction rope section and a second traction rope section for fault location according to vibration signals from a traction machine to the first traction rope section of a lift car and from the traction machine to the second traction rope of a counterweight, can quickly and accurately judge whether the slippage of the traction rope on a traction sheave is caused by the lift car or the counterweight being blocked by an obstacle, and accurately locate the fault position causing the slippage of the traction rope.
Drawings
Fig. 1 is a schematic flow chart showing the implementation of the motor operation monitoring method for a traction drive elevator according to the embodiment.
Fig. 2 is a schematic structural diagram of a data monitoring module used in the specific application embodiment of this embodiment.
Fig. 3 is a diagram illustrating the results of three-axis acceleration measurements taken during elevator operation in a specific application example.
FIG. 4 is a diagram illustrating the FFT analysis result of the Z-axis acceleration value obtained in the specific application embodiment.
Fig. 5 presents a diagrammatic representation of the result of the relative lengths and oscillations of the hoisting ropes of the section AB in the upward travel of the elevator obtained in the practical example.
Fig. 6 presents a diagrammatic representation of the result obtained in a practical embodiment of the relative lengths of the hoisting ropes of the CD section and the vibrations during the downward travel of the elevator.
Fig. 7 is a schematic structural diagram of a motor operation monitoring module for a traction drive elevator according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention.
As shown in fig. 1, the steps of the motor operation monitoring method for a traction drive elevator of the present embodiment include:
s1, data monitoring: monitoring the running state of a target elevator and a vibration signal on a hoisting rope in real time;
s2, data analysis: performing frequency domain analysis on the vibration signal monitored in the step S1, obtaining the state of the vibration signal on the hoist rope and judging the running state of the motor according to the frequency domain analysis result;
s3, judging a fault state: and judging whether a fault state that the motor does not stop running when the traction rope slips on the traction sheave exists or not according to the monitored running state of the elevator, the state of the vibration signal on the traction rope and the running state of the motor.
The operation of the traction mechanisms such as the motor, the traction sheave and the like and the up-and-down operation of the car along the guide rail generate corresponding vibration, the vibration is transmitted to the traction rope and is superposed into the vibration of the traction rope, when a fault state that the car or the counterweight moves downwards, the obstacle stops and the motor does not stop exists, the operation of the elevator stops at the moment, the pulse vibration generated by the operation of the motor and the traction sheave is superposed on the traction rope because the motor, the traction machine and the like do not stop at the moment, and the superposed vibration can be determined by carrying out frequency domain analysis on a vibration signal on the traction rope. The embodiment utilizes the characteristics, carries out frequency domain analysis by monitoring the running state of the elevator and the vibration signal on the traction rope in real time, obtains the state of the vibration signal on the traction rope and judges the running state of the motor according to the frequency domain analysis result, and finally judges whether the fault state that the motor does not stop running exists when the traction rope slips on the traction sheave by integrating the running state of the elevator, the state of the vibration signal on the traction rope and the running state of the motor, can realize intelligent monitoring of the running state of the motor by fully utilizing the characteristics when the fault state that the motor does not stop when the elevator car or the counterweight moves downwards due to the stopping of the obstacle is generated, so that the intelligent monitoring of the running state of the motor can be conveniently carried out in time when the traction rope slips on the traction sheave, and the like, thereby effectively improving the safety and reliability of the running of the elevator, the requirements of the current elevator manufacturing and installation safety standard are met.
In step S1 of this embodiment, the operation state of the elevator, and the states of the vibration signals of the hoisting machine to the car side hoisting rope and the hoisting machine to the counterweight side hoisting rope can be monitored in real time by specifically monitoring the acceleration data of the car to determine the operation state of the elevator and monitoring the vibration signals of the hoisting machine to the first hoisting rope section of the car and the hoisting machine to the second hoisting rope section of the counterweight, respectively. As shown in fig. 2, the data monitoring is implemented by providing a data monitoring module, the data monitoring module specifically includes a first detecting unit for monitoring the motion state of the car, a second detecting unit for monitoring the vibration signal from the traction machine to the first rope section of the car, and a third detecting unit for monitoring the vibration signal from the traction machine to the second rope section of the counterweight, the first detecting unit is disposed on the car, the second detecting unit is disposed on the first rope section, the third detecting unit is disposed on the second rope section, the acceleration data of the car is monitored by the first detecting unit to determine the operation state of the elevator, and the vibration signals on the rope sections at two sides are monitored by the second detecting unit and the third detecting unit.
It is understood that the monitoring of the hoist rope vibration signal can of course also be realized by arranging only one detection unit according to the actual requirement, i.e. directly acquiring the vibration signal of the hoist rope on the required side.
In a specific application embodiment, the first detection unit may be fixed to a car roof, the second detection unit may be fixed to a hoist rope from a hoisting machine to the car and may be as far away from the car as possible without affecting the operation of the hoist rope, the third detection unit may be fixed to the hoist rope or may be fixed to a counterweight, and if the third detection unit is fixed to the hoist rope, the third detection unit may be as far away from the counterweight as possible without affecting the operation of the hoist rope.
In step S2 of this embodiment, the operation state of the motor is determined by determining whether the hoist rope is superimposed with vibration generated by the operation of the motor and/or vibration generated by the operation of the traction sheave according to the frequency domain analysis result, and the specific steps are as follows: and if the difference between the frequency component and the motor pulse frequency and/or the traction sheave rotation frequency is within a specified range, judging that the traction rope is superposed with the vibration generated by the running of the motor and/or the traction sheave rotation frequency and judging that the motor is in a running state, wherein the motor pulse frequency is the corresponding pulse frequency when the motor runs. The frequency domain analysis is carried out on the vertical vibration signal on the traction rope, and if frequency domain components which are consistent with the pulse frequency of the motor or the revolution frequency of the traction sheave exist in each obtained frequency domain component, or two frequency domain components which are consistent with the pulse frequency of the motor and the revolution frequency of the traction sheave exist respectively, the vibration generated by the motor and the running of the traction sheave which are superposed on the traction rope can be judged, so that the motor can be confirmed to be in a running state without stopping running, and the running state of the motor can be quickly and accurately judged.
In this embodiment, the motor pulse frequency can be calculated according to the following formula:
wherein f isElectric powerIs the motor pulse frequency, P is the pole number of the permanent magnet synchronous motor, fDrag theI is the hoisting ratio, i is the rotation frequency of the traction sheave.
The rotation frequency f of the traction sheaveDrag theSpecifically, the formula can be calculated as follows:
in the formula (2), i is the suspension ratio, V is the speed, and D is the diameter of the traction sheave.
The result of frequency domain analysis of the car acceleration data of a certain elevator running is collected in the specific application embodiment of the invention and is shown in fig. 3 and 4, wherein fig. 3 is the collected three-axis (XYZ) acceleration measurement result of the elevator running, fig. 4 is the result obtained by performing FFT spectrum analysis on the Z-axis acceleration measurement result of fig. 3, the Z-axis vibration dominant frequency is calculated after the collected acceleration data is subjected to FFT spectrum analysis, and the frequency is compared with the motor pulse frequency fElectric powerThe rotation frequency f of the traction sheaveDrag theIf the difference is satisfied, it is determined whether the vibration generated by the operation of the motor and the traction sheave is superimposed.
In step S3 of this embodiment, if it is determined that the first characteristic that the running speed and the displacement of the elevator tend to 0 are satisfied, the second characteristic that the horizontal vibration signal of the hoisting machine onto the first hoisting rope segment of the car (e.g., AB hoisting rope segment in fig. 2) or onto the second hoisting rope segment of the counterweight (e.g., CD hoisting rope segment in fig. 2) exceeds the preset threshold value is satisfied, and the third characteristic that the motor is determined to be in a running state, and the duration of the first characteristic, the second characteristic, and the third characteristic exceeds the preset threshold value, it is determined that the motor is not stopped when the traction rope slips on the traction sheave at present.
If the speed displacement of the elevator tends to 0, the elevator stops running, the horizontal vibration signal is increased when the traction rope slips on the traction sheave, and if the motor does not stop running at the moment, the vibration generated by the running of the motor and the traction sheave is superposed on the vertical vibration of the traction rope. Based on the above characteristics, the third feature is specifically: the pulse frequency f of the motor is superposed on the vertical vibration signal of the hauling ropeElectric powerAnd/or traction sheave turn fDrag the. The embodiment specifically satisfies the following conditions: the speed of the up-and-down movement of the cage approaches to zero (first characteristic), and the horizontal vibration of the first traction rope section (AB section) or the second traction rope section (CD section) is detected to exceed the set threshold (second characteristic), and simultaneously the pulse frequency f of the motor is superposed on the vertical vibration signal of the traction ropeElectric powerAnd/or traction sheave turn fDrag theAnd when the above feature duration exceeds a preset threshold (e.g., configured to 45s) (the third feature), it is determined that the hoist rope slips on the traction sheave and the motor does not stop running. By performing judgment in combination with the above features, a fault state in which the hoist rope slips on the traction sheave and the motor does not stop running can be effectively recognized.
In this embodiment, after step S3, a fault location step is further included, and the specific steps are: and respectively judging the relaxation states of the first traction rope section and the second traction rope section according to horizontal vibration signals from the traction machine to the first traction rope section of the lift car and from the traction machine to the second traction rope of the counterweight, and judging whether the current traction rope slips on the traction sheave and is caused by the lift car or the counterweight being blocked by an obstacle according to the judgment result. The condition that the traction rope on the traction sheave is slipped by the car or the counterweight is blocked by the obstacle is judged by utilizing the characteristic, so that whether the traction rope is slipped on the traction sheave by the car or the counterweight can be accurately positioned.
In this embodiment, the step of determining the relaxation states of the first hoisting rope segment and the second hoisting rope segment includes: and judging whether the vibration frequency of the horizontal direction vibration signal in the first traction rope section is greater than that of the horizontal direction vibration signal in the second traction rope section and whether the vibration amplitude of the horizontal direction vibration signal in the first traction rope section is smaller than that of the horizontal direction vibration signal in the second traction rope section, if so, judging that the current slipping of the traction rope on the traction sheave is caused by the blocking of the lift car by the obstacle, and otherwise, judging that the current slipping of the traction rope is caused by the blocking of the counterweight by the obstacle. The above-described configuration may be configured to use any one of the vibration frequency and the vibration amplitude for the determination.
The frequency and amplitude of the vibration of the hoisting rope are in direct proportion to the length and the degree of relaxation of the hoisting rope, i.e. the vibration is more pronounced the shorter the hoisting rope is under the same relaxation state, and is less pronounced otherwise. The results of the length of the hoisting ropes and the vibration of the elevator going upwards and downwards obtained in the practical embodiment are shown in fig. 5 and 6, wherein the hoisting ropes at the section AB are shorter and the vibration (X-axis) is more and more obvious when the elevator goes upwards as shown in fig. 5, and the hoisting ropes at the section AB are longer and the vibration (X-axis) is gradually weakened when the elevator goes downwards as shown in fig. 6. Correspondingly, under the condition of the same length, the larger the tension of the hoisting rope is, the more obvious the vibration is, and on the contrary, the vibration is weakened. By utilizing the characteristics, the embodiment can quickly and accurately judge the relative length and the relaxation degree of the two traction rope sections (the AB section and the CD section) by judging the difference of the vibration frequency and the amplitude of the horizontal vibration signal of the traction rope, thereby accurately obtaining whether the slippage of the traction rope on the traction sheave is caused by the car or the counterweight being blocked by the obstacle.
The invention in the concrete application embodiment utilizes the scheme to realize the concrete steps of monitoring the operation of the motor of the traction drive elevator, and comprises the following steps:
step 1: acquiring triaxial (XYZ) acceleration data of a car roof and a hoisting rope in real time;
step 2: calculating the running speed and the displacement of the car in real time according to the acceleration data of the collected car, wherein the vibration frequency is obtained through frequency domain analysis, and the running speed and the displacement are obtained through calculation according to the following formula:
speed of operation v-acceleration a x time t
Running displacement i-running speed v x time t
And step 3: and (3) carrying out hoist rope vibration analysis: calculating acceleration data on the hoisting rope through Fast Fourier Transform (FFT) to obtain vibration frequency, obtaining a plurality of frequency components, and analyzing each frequency component;
and 4, step 4: judging whether the frequency and the amplitude of the horizontal vibration of the hauling rope exceed the preset threshold value in the normal state or not; (2) the running speed and displacement of the elevator tend to zero; (3) the hoisting rope is superposed with the pulse frequency f of the motorElectric powerAnd/or the frequency f of the rotation of the traction sheaveDrag theAnd (4) if the duration time of the above 3 characteristics exceeds a preset threshold value, judging that a fault state that the traction rope slips on the traction sheave and the motor does not stop running occurs, and turning to the step 5; if no fault is detected, returning to the stepStep 1;
and 5: recording the current landing of the elevator, alarm information, storing various original data and other fault data, and sending the alarm information, the fault data and the like through a communication module;
step 6: and repeating the steps until the monitoring is quitted.
The running state of the motor of the traction drive elevator can be monitored in real time through the steps, the fault state that the traction rope slips on the traction sheave and the motor does not stop running can be identified timely and accurately, corresponding fault processing can be executed timely when the fault occurs, if an elevator running time limiter is configured in the elevator, the action of the elevator running time limiter can be controlled timely, and the running reliability of the traction drive elevator is effectively improved.
In this embodiment, before step S1, the method further includes a parameter calibration step of calibrating a parameter threshold value used for determining the running state of the elevator and the state of the vibration signal on the hoist rope, where the parameter calibration step includes: the method comprises the steps of collecting acceleration data of a car and a hauling rope in the static and normal running process of a target elevator, calculating vibration characteristics of the car and the hauling rope in each landing when the target elevator runs according to the collected acceleration data, and counting a plurality of calculated vibration characteristics to form a corresponding vibration characteristic threshold value for judging the running state of the elevator and judging the state of a horizontal vibration signal on the hauling rope. The operating condition of different elevators can have the difference, and this embodiment is through carrying out parameter calibration in advance, obtains vibration characteristic threshold value by the statistics of the acceleration speed when the elevator normally operates, and follow-up running state, the state of judging vibration signal on the haulage rope etc. that can judge the elevator based on this vibration characteristic threshold value compares in setting for the threshold value based on empirical data, and the elevator that can be nimble be applicable to the different grade type obtains more reasonable parameter to further ensure the precision of monitoring. The vibration characteristics can be specifically running speed, displacement, or various parameters required by vibration peak-to-peak value, vibration frequency and the like.
In a specific application embodiment, the parameter calibration steps are as follows:
step 1: calculating motor pulses for an elevatorFrequency of attack fElectric powerAnd the revolution frequency f of the traction sheaveDrag the；
Step 2: acquiring acceleration data of a car and a hoisting rope when an elevator is static, calculating an acceleration data offset value, and correcting the offset of data acquired by an acceleration sensor for acquiring the acceleration data based on the acceleration data offset value;
and step 3: acquiring acceleration data of an elevator running car and a hoisting rope, and calculating the vibration characteristics of the car and the hoisting rope in each landing when the elevator runs in the whole course or layer by layer according to the acquired acceleration data;
and 4, step 4: calculating other indexes beneficial to analysis and judgment, such as running speed, displacement and the like, based on the acquired acceleration data;
and 5: and accumulating data for a period of time, forming a vibration characteristic threshold value and storing the vibration characteristic threshold value.
The calibration steps can be further configured to be repeated at intervals according to a certain period, and the calibration is carried out again after the elevator running mechanism is maintained, so that the precision of real-time monitoring is ensured.
The motor operation monitoring device for the traction drive elevator comprises:
the data monitoring module is used for monitoring the running state of the elevator and a vibration signal on the hoisting rope in real time;
the data analysis module is used for carrying out frequency domain analysis on the vibration signals monitored by the data monitoring module, obtaining the state of the vibration signals on the hoisting rope according to the frequency domain analysis result and judging the running state of the motor;
and the fault state judging module is used for judging whether a fault state that the motor does not stop running when the traction rope slips on the traction sheave exists or not according to the monitored running state of the elevator, the state of the horizontal vibration signal on the traction rope and the running state of the motor.
In this embodiment, in the above-described failure state determination module, if it is determined that the first characteristic that the operating speed and the displacement of the elevator tend to 0 are satisfied, the second characteristic that the horizontal vibration signal from the hoisting machine to the first hoisting rope section of the car or from the hoisting machine to the second hoisting rope section of the counterweight exceeds the preset threshold value is satisfied, and the third characteristic that the vibration generated by the operation of the motor and/or the traction sheave is superimposed on the hoisting rope is satisfied, and the duration of the first characteristic, the second characteristic, and the third characteristic exceeds the preset threshold value, it is determined that the motor does not stop operating when the hoisting rope slips on the traction sheave at present.
In this embodiment, the data monitoring module includes a first detecting unit for monitoring the motion state of the car, a second detecting unit for monitoring the vibration signal from the traction machine to the first traction rope section of the car, and a third detecting unit for monitoring the vibration signal from the traction machine to the second traction rope section of the counterweight, where the first detecting unit is disposed on the car, the second detecting unit is disposed on the first traction rope section, and the third detecting unit is disposed on the second traction rope section, as shown in fig. 2.
The motor operation monitoring device for the traction drive elevator and the motor operation monitoring method for the traction drive elevator correspond to each other one by one, and are not described in detail herein.
The embodiment further comprises an alarm unit connected with the fault state determination module, and the alarm unit is used for sending alarm signals, fault data and the like when the fault state determination module determines that the fault state that the motor does not stop running when the traction rope slips on the traction sheave exists, and timely prompting the fault state to facilitate timely maintenance and treatment.
As shown in fig. 7, in the embodiment of the motor operation monitoring device for a traction drive elevator of the present invention, the first to third detection units all use acceleration sensors to collect acceleration data, the data analysis module and the fault state determination module are implemented by a main control module, the main control module can be disposed at a car top or the like, and the communication module is provided to transmit a monitoring threshold value, a detection result, and the like.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (9)
1. A motor operation monitoring method for a traction drive elevator, characterized by comprising the steps of:
s1. data monitoring: monitoring the running state of a target elevator and a vibration signal on a hoisting rope in real time;
s2, data analysis: performing frequency domain analysis on the vibration signal monitored in the step S1, obtaining the state of the vibration signal on the hoist rope and judging the running state of the motor according to the frequency domain analysis result;
s3. determination of fault state: judging whether a fault state that the motor does not stop running when the traction rope slips on the traction sheave exists or not according to the monitored running state of the elevator, the state of the vibration signal on the traction rope and the running state of the motor;
in the step S2, the operation state of the motor is determined by determining whether the hoist rope is superimposed with the vibration generated by the operation of the motor and/or the vibration generated by the operation of the traction sheave according to the frequency domain analysis result, and the specific steps are as follows: and carrying out frequency domain analysis on a vertical direction signal in the vibration signal on the traction rope to obtain a plurality of frequency components, respectively comparing each frequency component with the pulse frequency of the motor and the revolution frequency of the traction sheave, if the difference between the frequency component and the pulse frequency of the motor and/or the revolution frequency of the traction sheave is within a specified range, judging that the traction rope is superposed with the vibration generated by the running of the motor and/or the vibration generated by the running of the traction sheave, and judging that the motor is in a running state, wherein the pulse frequency of the motor is the corresponding pulse frequency when the motor runs.
2. The method for monitoring the operation of a motor for a traction-driving elevator according to claim 1, wherein in the step S1, the acceleration data of the car is monitored to determine the operation state of the elevator, and the vibration signals from the traction machine to the first rope portion of the car and from the traction machine to the second rope portion of the counterweight are monitored, respectively.
3. The motor operation monitoring method for a traction-driving elevator according to claim 1 or 2, wherein in the step S3, if it is judged that the first characteristic that the operation speed and the displacement of the elevator tend to 0 are satisfied, and the second characteristic that the horizontal vibration signal of the traction machine onto the first traction rope section of the car and/or the traction machine onto the second traction rope section of the counterweight exceeds the preset threshold value and the third characteristic that the motor is judged to be in the running state are satisfied, and the duration of the first characteristic, the second characteristic, and the third characteristic exceeds the preset threshold value, it is judged that the motor is not stopped when the traction rope slips on the traction sheave at present; the third characteristic is specifically that the hoisting rope is superposed with vibration generated by the operation of a motor and/or vibration generated by the operation of a traction sheave.
4. The motor operation monitoring method for the traction drive elevator according to claim 1 or 2, characterized by further comprising a fault locating step after the step S3, the method comprising the specific steps of: the method comprises the steps of judging the relaxation states of a first traction rope section and a second traction rope section according to horizontal vibration signals from a traction machine to the first traction rope section of a lift car and from the traction machine to the second traction rope of a counterweight respectively, and judging whether the current slipping of the traction rope on a traction wheel is caused by the lift car or the counterweight being blocked by an obstacle according to the judgment result.
5. The motor operation monitoring method for a traction drive elevator according to claim 4, wherein the step of determining the relaxation state of the first and second traction rope segments comprises: judging whether the vibration frequency of the horizontal direction vibration signal in the first traction rope section is greater than the vibration frequency of the horizontal direction vibration signal in the second traction rope section and/or whether the vibration amplitude of the horizontal direction vibration signal in the first traction rope section is smaller than the vibration amplitude of the horizontal direction vibration signal in the second traction rope section, if so, judging that the current slipping of the traction rope on the traction sheave is caused by the fact that the elevator car is blocked by an obstacle, otherwise, judging that the current slipping of the traction rope is caused by the fact that the counterweight is blocked by the obstacle.
6. The motor operation monitoring method for a traction-drive elevator according to claim 1 or 2, further comprising a parameter calibration step of calibrating a parameter threshold for determining the operation state of the elevator, the state of the vibration signal on the traction rope, before the step S1, the parameter calibration step comprising: the method comprises the steps of collecting acceleration data of a car and a hauling rope in the static and normal running processes of a target elevator, calculating vibration characteristics of the car and the hauling rope in each landing when the target elevator runs according to the collected acceleration data, and counting a plurality of vibration characteristics obtained through calculation to form a corresponding vibration characteristic threshold value for judging the running state of the elevator and judging the state of a vibration signal on the hauling rope.
7. A motor operation monitoring apparatus for a traction drive elevator, comprising:
the data monitoring module is used for monitoring the running state of the elevator and a vibration signal on the hoisting rope in real time;
the data analysis module is used for carrying out frequency domain analysis on the vibration signals monitored by the data monitoring module, obtaining the state of the vibration signals on the hoisting rope according to the frequency domain analysis result and judging whether the hoisting rope is superposed with vibration generated by the running of the motor;
the fault state determination module is used for determining whether a fault state that the motor does not stop running when the traction rope slips on the traction sheave exists or not according to the monitored running state of the elevator, the state of the vibration signal on the traction rope and the running state of the motor;
in the data analysis module, whether the vibration generated by the operation of the motor and/or the vibration generated by the operation of the traction sheave are superposed on the traction rope or not is judged according to the frequency domain analysis result so as to judge the operation state of the motor, and the specific steps are as follows: and carrying out frequency domain analysis on a vertical direction signal in the vibration signal on the traction rope to obtain a plurality of frequency components, respectively comparing each frequency component with the pulse frequency of the motor and the revolution frequency of the traction sheave, if the difference between the frequency component and the pulse frequency of the motor and/or the revolution frequency of the traction sheave is within a specified range, judging that the traction rope is superposed with the vibration generated by the running of the motor and/or the vibration generated by the running of the traction sheave, and judging that the motor is in a running state, wherein the pulse frequency of the motor is the corresponding pulse frequency when the motor runs.
8. The apparatus for monitoring operation of a motor for a traction-driving elevator according to claim 7, wherein the data monitoring module comprises a first detecting unit for monitoring a motion state of the car, a second detecting unit for monitoring a vibration signal of the traction machine to a first traction rope segment of the car, and a third detecting unit for monitoring a vibration signal of the traction machine to a second traction rope segment of the counterweight, the first detecting unit being provided on the car, the second detecting unit being provided on the first traction rope segment, and the third detecting unit being provided on the second traction rope segment.
9. The motor operation monitoring device for a traction drive elevator according to claim 7 or 8, further comprising an alarm unit connected to the failure state determination module for transmitting an alarm signal and/or failure data when the failure state determination module determines that there is a failure state in which the motor does not stop operating when the traction rope slips on the traction sheave.
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| CN111523443B (en) * | 2020-04-21 | 2023-04-18 | 广州广日电梯工业有限公司 | Elevator steel wire rope and identification method and identification system thereof |
| CN111606177B (en) * | 2020-06-04 | 2022-04-12 | 上海三菱电梯有限公司 | Passenger conveying device and fault detection monitoring method and device thereof |
| CN113264429A (en) * | 2021-03-15 | 2021-08-17 | 上海电气集团股份有限公司 | Vibration data processing, model training and detecting method and system for lifting equipment |
| CN114715752B (en) * | 2022-06-08 | 2022-08-23 | 凯尔菱电（山东）电梯有限公司 | Abnormity detection method and system for elevator |
| CN115159285B (en) * | 2022-07-01 | 2023-11-03 | 重庆大学 | Elevator state monitoring method and elevator state monitoring device |
| CN115465740B (en) * | 2022-08-16 | 2023-08-25 | 浙江弗尔德驱动科技有限公司 | High-efficiency energy-saving traction machine |
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