CN104180983A - Mechanical vibrator fastener monitoring system and monitoring method of mechanical vibrator fastener monitoring system - Google Patents
Mechanical vibrator fastener monitoring system and monitoring method of mechanical vibrator fastener monitoring system Download PDFInfo
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- CN104180983A CN104180983A CN201410443271.4A CN201410443271A CN104180983A CN 104180983 A CN104180983 A CN 104180983A CN 201410443271 A CN201410443271 A CN 201410443271A CN 104180983 A CN104180983 A CN 104180983A
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Abstract
The invention discloses a mechanical vibrator fastener monitoring method. The mechanical vibrator fastener monitoring method is characterized by including the following steps: S1, marking a fastener; S2, collecting video images of the fastener in the static state and extracting one frame of image in the video images to serve as an original state image; S3, collecting video images of the fastener in the working state and extracting one frame of image in the video images to serve as a current state image; S4, comparing the current state image with the original state image and calculating the distance d between marks, located on the fastener, of the two frames of images; S5, comparing the distance d with a set value s and judging that the fastener on a current vibrator is loosened if the d is smaller than the s. The invention further discloses a mechanical vibrator fastener monitoring system. The mechanical vibrator fastener monitoring system is simple, practical and low in cost, real-time finding and real-time alarming are achieved before the fastener is loosened, and requirements of judgment on looseness of the fastener under the high-frequency, large-amplitude and indiscipline vibration conditions are completely met.
Description
Technical field
The present invention relates to supervisory system, relate in particular to a kind of mechanical vibration generator system securing member supervisory system and method for supervising thereof.
Background technology
Mechanical shaker is a kind of eccentric mechanism, and its eccentric wheel rotates under the drive of motor, and the roller contacting with it rolls along eccentric edge, and the traveller being connected with roller can do vertical to-and-fro movement under the effect of guiding mechanism.The device that is fixed must be fixed on mechanical shaker with securing member, and mechanical shaker, at different vibration frequencies and different amplitudes, does not even vibrate under rule Vibration Condition, and under this kind of vibration condition, securing member very easily becomes flexible, and causes the accident.
At present, prevent that the loosening method of securing member is specifically divided three classes:
1) securing member is transformed as bolt or nut.The Chinese patent that application number is CN201320870580 provides a kind of anti-loose anti-theft nut, comprise body, elastic thread cover, described body upper end is provided with and screws structure, in described body, be provided with a cavity, described elastic thread is placed in described cavity, and one end of described elastic thread cover is fixedly connected with described body, the other end and the described body clearance fit of described elastic thread cover;
The Chinese patent that application number is CN201280034871 provides a kind of check bolt, is made up of the threaded axial region of periphery tool and the head of the one end that is arranged on axial region, and head is by forming with lower component: the main part that is hexagonal cross-sectional shape; The skirt section of tubular, setting is connected with main part, and from main part to its radial direction outside away from and described to adopt dangle curved surface concave surface be formed as expanding shape, the downside end face of the outside surface in skirt section is parallel with the axis of main part, and the inside surface with skirt section is emptied into the curved structure of lent inverted hang when bottom peripheral edge retains par.
This class, based on the transformation of bolt or nut is all needed bolt or nut to empty, generates cavity, all can not under high frequency, large amplitude and irregular vibration condition, be used as the securing member of mechanical shaker.
2) to securing member as the loosening manual inspection of carrying out of bolt or nut.Adopt spanner one by one securing member to be detected, if securing member quantity is many, need to expend a large amount of man power and materials, and near the position that testing staff must arrive securing member is detected, more waste time and energy in the position that is difficult for arriving, also may occur unsafe condition.This detection method efficiency is lower, can not monitor in real time, and also dangerous factor, therefore, the loosening detection of securing member under inapplicable mechanical shaker high frequency, large amplitude and irregular vibration condition.
3) securing member is monitored as the loosening of bolt or nut.The Chinese patent that application number is CN201220247642 provides a kind of bolt or nut loosening supervising device, comprise the acquisition module that gathers bolt or nut loosening signal, connection acquisition module is processed the signal of acquisition module collection and according to the signal gathering, whether bolt or nut is become flexible to the main control module judging and the object module of reporting to the police according to master control module judges result, it is characterized in that described device also comprises the sensing module being arranged on monitoring site bolt or nut, described sensing module comprises changing sensor, described changing sensor contacts with bolt or nut by thimble, described changing sensor is connected with acquisition module by signal wire, in the time of bolt or nut loosening, bolt or nut make thimble move to changing sensor, and described changing sensor sends to acquisition module by the deformation quantity of bolt or nut loosening by signal wire.
The method of this class based on additional sensing module on bolt or nut all needs, to bolt or the additional changing sensor of nut, the deformation quantity of bolt or nut loosening to be sent to acquisition module by signal wire.Changing sensor is of a high price, and changing sensor installation process complexity, even cannot install.Signal wire very easily fractures under mechanical shaker high frequency and large amplitude condition, and therefore these class methods can not be used for the loosening monitoring of securing member under mechanical shaker high frequency, large amplitude and irregular vibration condition equally.
Summary of the invention
Technical matters to be solved by this invention is how to overcome and existingly prevents that the loosening method of securing member can not be useful in the defect under high frequency, large amplitude and irregular vibration condition.
In order to solve the problems of the technologies described above, the invention provides a kind of mechanical vibration generator system securing member method for supervising, described method utilizes mechanical vibration generator system securing member supervisory system to monitor the loosening situation of the securing member on mechanical vibration generator system, comprises the following steps:
S1, the securing member being fixed on mechanical vibration generator system is carried out to mark, or the securing member after mark is fixed on mechanical vibration generator system;
The video image of securing member under S2, collection stationary state, the two field picture in extraction video image is as original state image;
The video image of securing member under S3, collecting work state, the two field picture in extraction video image is as current state image;
S4, current state image and original state image are compared, calculate in two two field pictures the distance d between same mark on securing member,
S5, the distance d that step S4 is calculated and setting value s compare,
If d<s, judges that the securing member on current shaking table is not loosening, and returns to step S3,
If d >=s, judges that the securing member on current shaking table is loosening.
Wherein, described video camera is common video camera, as cmos camera or ccd video camera, without the need for specific function, only needs to make a video recording simply.
Further, in described step S3, before extracting video image, also comprise, use imaging smear elimination algorithm to carry out smear elimination to described video image, thereby obtain video image clearly.
Further, after described step S5 is also included in and judges that securing member is loosening, the data of the video image that storage gathers and corresponding comparison result.
Further, if judge, the securing member on current shaking table is loosening, carries out following steps:
Send alerting signal and start timing, if clocking value is greater than the time threshold of setting, controls mechanical vibration generator system and quit work.
Further, between described step S1 and S2, also comprise supervisory system is carried out to initialization process, in step S2,
If do not extract original state image, judge that initialization process is unsuccessful, and again carry out initialization process,
If extract original state image, judge initialization process success, and carry out next step.
Particularly, in step S2 and S3, a described two field picture is specially in the arbitrary two field picture in extraction current video image or the n two field picture in current video image and extracts a two field picture every m two field picture, wherein n > m.
Correspondingly, the present invention also provides a kind of mechanical vibration generator system securing member supervisory system, it is characterized in that, comprises video camera, processor,
Described video camera, for gathering video image, described video image is made up of several two field pictures;
Described processor, comprise extraction unit, computing unit and comparing unit, described extraction unit is for extracting a two field picture from video image, described computing unit is for calculating the distance between same mark on current state image and original state image securing member, described comparing unit, for the distance calculating and setting value are compared, judges that whether the securing member on mechanical vibration generator system is loosening.
Further, described processor also comprises smear elimination unit, and described smear is eliminated unit to carrying out smear elimination in described video image.
Further, described supervisory system also comprises initialization module, prior-warning device and controller,
Described initialization module, for carrying out initialization process to supervisory system;
Described prior-warning device comprises forecast unit and judging unit, and described forecast unit is for reporting to the police and timing, and described judging unit is used for judging whether clocking value is greater than time threshold;
Described controller, quits work for controlling mechanical vibration generator system.
Further, described processor also comprises storage unit and output unit, described storage unit is for the data of video image and the corresponding comparison result of storage of collected, and described output unit, for exporting the data of cell stores, is reviewed to carry out the inquiry of historical data.
Mechanical vibration generator system securing member supervisory system of the present invention and method for supervising thereof, have following beneficial effect:
1, the present invention is mechanical vibration generator system securing member supervisory system and the method for supervising thereof based on machine vision, supervisory system does not come in contact with mechanical shaker, do not transform any metal object of mechanical shaker first wife securing member, only at the enterprising row labels of mechanical shaker first wife securing member, method simple practical.
2, with other, strict demand of video camera and complexity are required to compare, video camera of the present invention is common camera, and cost is lower and meet completely under high frequency, large amplitude and irregular vibration condition the loosening differentiation of securing member.
3, with imaging smear elimination algorithm to carrying out smear elimination in video image, thereby extract video image clearly, more clearly show the true imaging under high frequency, large amplitude and irregular vibration condition that is marked on securing member, be more conducive to judge the loosening situation of securing member.
4, monitor by the image of the mark on securing member, at the beginning of securing member occurs to become flexible, just find in time, and alarm, notice associative operation personnel, exceeding the time limit while not processing, stop the work of mechanical shaker automatically, have advantages of automatic identification, the method can thoroughly solve under mechanical vibration generator system high frequency, large amplitude and irregular condition the securing member accident that gets loose.
5, utilize the situation of processor of the present invention for the fixing identical device that is fixed of the securing member with identical, can reduce the running time, in addition, can also carry out easily the inquiry of historical data.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the process flow diagram of mechanical vibration generator system securing member method for supervising of the present invention.
Fig. 2 is mechanical vibration generator system securing member supervisory system block diagram of the present invention.
Fig. 3 is the mark in bolt tail end plane;
Fig. 4 is three marks that are mutually 120 ° in nut plane;
Fig. 5 is in the time that bolt penetrates nut from top to bottom, the layout schematic diagram of mechanical vibration generator system securing member supervisory system of the present invention, and wherein dotted line represents the part being blocked;
Fig. 6 is in the time that bolt penetrates nut from the bottom up, the layout schematic diagram of mechanical vibration generator system securing member supervisory system of the present invention, and wherein dotted line represents the part being blocked.
In figure: 1-bolt, 2-nut, 3-video camera, the 4-device that is fixed, 5-mark.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
Embodiment mono-:
The invention provides a kind of mechanical vibration generator system securing member method for supervising, described method utilizes mechanical vibration generator system securing member supervisory system to monitor the loosening situation of the securing member on mechanical vibration generator system, comprises the following steps:
S1, as shown in Figure 3 and Figure 5, in the time that bolt 1 inserts nut 2 from top to bottom, round dot of submarginal position mark bolt 1 and nut 2 are fixed on mechanical vibration generator system in the bolt that is 24mm at diameter 1 tail end plane, the frequency of operation of shaking table is 2000 hertz, and the displacement in the vibration processes of shaking table is 5mm;
S2, initialization module carry out initialization process to supervisory system;
S3, by CMOS (Complementary Metal-Oxide-Semiconductor Transistor, complementary metal oxide semiconductor (CMOS)) video camera 3 is arranged on its angular field of view and can covers the position of the round dot on bolt 1, the video image of collection machinery shaking table bolt 1 in the time of stationary state, and get arbitrary two field picture as original state image, the electronic shutter of cmos camera 3 is 1/25s
If do not photograph original state image, judge that initialization process is unsuccessful, and return to step S2,
If photograph original state image, judge initialization process success, and carry out next step;
S4, the video image of bolt 1 while utilizing cmos camera 3 collection machinery shaking tables in working order;
S5, the video signal that utilizes A/D converter that cmos camera 3 is gathered are converted into digital signal, and send described digital signal to processor;
S6, utilize smear in processor to eliminate unit described digital signal image is carried out to smear elimination, utilize extraction unit to extract the arbitrary two field picture in current video image, as current state image, then current state image and original state image are compared, computing unit calculates in two two field pictures the distance between same mark on bolt 1
If distance is less than setting value 7mm, judge that the securing member on current shaking table is not loosening, and return to step S4,
If distance is more than or equal to setting value 7mm, judges that the securing member on current shaking table is loosening, and carry out next step;
Report to the police and timing in forecast unit in S7, prior-warning device, judging unit in prior-warning device judges whether clocking value is greater than time threshold 5min, if described clocking value is less than 5min, returns to step S6, if described clocking value is more than or equal to 5min, carry out next step;
S8, controller control mechanical vibration generator system quit work.
Wherein, as shown in Figure 5, be fixed device 4 use bolts 1 and nut 2 are fixed.
Imaging smear elimination algorithm used in the present embodiment comprises four steps:
Suppose that bolt 1 and nut 2 are black, the round dot on bolt 1 is red, when non-this type of color, need to be given in the setting interface of software, and in practice as long as these two kinds of colors are obviously to distinguish.
S1, streaking zone location, for being extracted in the situation of mechanical vibration generator system high-speed high frequency vibration, the region that produces conditions of streaking in the dot chart picture that cmos camera obtains.Its algorithm is:
Suppose that in image, the coordinate of each pixel is (x
i, y
i),
Set up three-dimensional array M (x, y, z),
In image, carry out traversal search, the pixel of satisfy condition R>40 and G<40 and B<40 (R, G, B represent respectively red, green, blue) is labeled as to M (x
i, y
i, 1), otherwise be labeled as M (x
i, y
i, 0), obtain the area array M={M (x, y, z) of conditions of streaking | M (x
i, y
i, 1) };
The region stack of S2, conditions of streaking, its algorithm is:
The number n (n=10 or more) of selected superimposed image, the area array of the conditions of streaking being generated by streaking zone location algorithm is designated as respectively M
1, M
2..., M
10
The union of calculating Mi, is designated as M,
S3, marker motion track Boundary Extraction, its algorithm is:
Calculate the point coordinate xi in M, the maximal value of yi and minimum value, be designated as
X
min＝min(x
i|M(x
i,y
i,1))
X
max＝max(x
i|M(x
i,y
i,1))
Y
min＝min(y
i|M(x
i,y
i,1))
Y
max＝max(y
i|M(x
i,y
i,1))
S4, judge that bolt is whether loosening, its algorithm is:
In the time starting working, gather X
min0, X
max0, Y
min0, Y
max0,
At the new X of each acquisition
min, X
max, Y
min, Y
maxwhen value, with X
min0, X
max0, Y
min0, Y
max0compare, calculate Z=max{|X
min-X
min0|, | X
max-X
max0|, | Y
min-Y
min0|, | Y
max-Y
max0|,
In the time that Z is greater than setting value (being 7mm in the present embodiment), send alerting signal, gather the start time of reporting to the police, exceed when the current time in system start time 5min that reports to the police, and operating personnel are not while processing, controller control mechanical vibration generator system quits work automatically.
Wherein, the mark 5 in the present embodiment can be other marks that the round dot of different colours maybe can be used as mark 5, accordingly, in the time carrying out smear elimination algorithm, need in software set interface, change corresponding parameter.In addition, arbitrary two field picture can be understood as the image of randomly drawing, can also be for pressing the image of certain rule extraction.
Correspondingly, the present invention also provides a kind of mechanical vibration generator system securing member supervisory system, comprises initialization module, cmos camera, A/D converter, processor, prior-warning device and controller,
Described initialization module, for carrying out initialization process to supervisory system;
Described cmos camera, for gathering video image, described video image is made up of several two field pictures;
Described A/D converter, for the video signal of cmos camera Real-time Collection is converted into digital signal, and sends described digital signal to processor;
Described processor, it comprises smear elimination unit, extraction unit, computing unit and comparing unit, described smear is eliminated unit described digital signal image is carried out to smear elimination, described extraction unit extracts with the arbitrary two field picture in the video image after smear elimination algorithm elimination smear, distance between same mark on securing member in described computing unit calculating current state image and original state image, described comparing unit is compared the distance calculating and setting value, and then judges that whether bolt 1 and nut on mechanical vibration generator system be loosening;
Described prior-warning device, comprises forecast unit and judging unit, and described forecast unit is for reporting to the police and timing, and described judging unit is used for judging whether clocking value is greater than 5min, and then judges whether to start controller.
Described controller, quits work for controlling mechanical vibration generator system.
Mechanical vibration generator system securing member supervisory system of the present invention and method for supervising thereof, have following beneficial effect:
1, the present invention is mechanical vibration generator system securing member supervisory system and the method for supervising thereof based on machine vision, supervisory system does not come in contact with mechanical vibration generator system, do not transform mechanical vibration generator system first wife's screw bolt and nut, only at the enterprising row labels of mechanical vibration generator system first wife bolt, method simple practical.
2, with other, strict demand of video camera and complexity are required to compare, video camera of the present invention is common cmos camera, and cost is lower and meet under high frequency, large-amplitude vibration condition the loosening differentiation of securing member.
3, with imaging smear elimination algorithm, smear elimination is carried out in the round dot position on the bolt in described arbitrary two field picture, thereby extract the exact position of round dot on described bolt, clearly show round dot on the bolt true imaging under high frequency and large-amplitude vibration condition, be conducive to judge the loosening situation of screw bolt and nut.
4, carry out detecting and identifying by the image of the round dot on bolt, at the beginning of securing member occurs to become flexible, just find in time, and alarm, notice associative operation personnel, exceeding the time limit while not processing, stop the work of mechanical shaker automatically, have advantages of automatic identification, the method can thoroughly solve under mechanical vibration generator system high frequency and large amplitude condition the securing member accident that gets loose.
Embodiment bis-:
The invention provides a kind of mechanical vibration generator system securing member method for supervising, described method utilizes mechanical vibration generator system securing member supervisory system to monitor the loosening situation of the securing member on mechanical vibration generator system, comprises the following steps:
S1, as shown in Figure 6, in the time that bolt 1 inserts nut 2 from the bottom up, in nut 2 planes that are 18mm at diameter, be mutually the round dot of two different colours of two position marks of 180 °, and bolt 1 and nut 2 are fixed on mechanical vibration generator system, the frequency of operation of shaking table is 4500 hertz, and the displacement in the vibration processes of shaking table is 10mm;
S2, initialization module carry out initialization process to supervisory system;
S3, by CCD (Charge Coupled Device, charge coupled cell) video camera 3 is arranged on its angular field of view and can covers the position of at least one round dot in nut 2 planes, the video image of collection machinery shaking table nut 2 in the time of stationary state, and from described video image, extract a two field picture as original state image, the electronic shutter of ccd video camera 3 is 1/50s
If do not photograph original state image, judge that initialization process is unsuccessful, and return to step S2,
If photograph original state image, judge initialization process success, and carry out next step;
S4, utilize the video image of ccd video camera 3 collection machinery shaking tables at when work nut 2;
S5, utilize A/D converter that the video signal of ccd video camera 3 Real-time Collections is converted into digital signal, and send described digital signal to processor;
S6, utilize smear in processor to eliminate unit the nut 2 in described digital signal image is carried out to smear elimination, and utilize the extraction unit in processor to extract with the image in the video image after smear elimination algorithm elimination smear, then by current state image and original state image ratio, computing unit calculates in two two field pictures the distance between same mark 5 on bolt 1
If distance is less than setting value 11mm, judge that the securing member on current shaking table is not loosening, and return to step S4,
If distance is more than or equal to setting value 11mm, judges that the securing member on current shaking table is loosening, and carry out next step;
S7, utilize the data of cell stores video image in processor and corresponding comparison result, then utilize the output unit output storage data in processor, can carry out the inquiry of historical data and review.
Report to the police and timing in forecast unit in S8, prior-warning device, judging unit in prior-warning device judges whether clocking value is greater than time threshold 3min, if described clocking value is less than 3min, returns to step S6, if described clocking value is more than or equal to 3min, carry out next step;
S9, controller control mechanical vibration generator system quit work.
Wherein, as shown in Figure 6, be fixed device 4 use bolts 1 and nut 2 are fixed.
Imaging smear elimination algorithm used in the present embodiment comprises four steps:
Suppose that bolt 1 and nut 2 are black, two round dots on nut 2 are red and green, when non-this type of color, need to be given in the setting interface of software, and in practice as long as these two kinds of colors are obviously to distinguish.
S1, streaking zone location, for being extracted in the situation of mechanical vibration generator system high-speed high frequency vibration, the region that produces conditions of streaking in the dot chart picture that cmos camera obtains.Its algorithm is:
Suppose that in image, the coordinate of each pixel is (x
i, y
i),
Set up three-dimensional array M (x, y, z),
In image, carry out traversal search, the pixel of satisfy condition R>40 and G>40 and B<40 (R, G, B represent respectively red, green, blue) is labeled as to M (x
i, y
i, 1), otherwise be labeled as M (x
i, y
i, 0), obtain the area array M={M (x, y, z) of conditions of streaking | M (x
i, y
i, 1) };
The region stack of S2, conditions of streaking, its algorithm is:
The number n (n=15) of selected superimposed image, the area array of the conditions of streaking being generated by streaking zone location algorithm is designated as respectively M
1, M
2..., M
15
The union of calculating Mi, is designated as M,
S3, marker motion track Boundary Extraction, its algorithm is:
Calculate the point coordinate xi in M, the maximal value of yi and minimum value, be designated as
X
min＝min(x
i|M(x
i,y
i,1))
X
max＝max(x
i|M(x
i,y
i,1))
Y
min＝min(y
i|M(x
i,y
i,1))
Y
max＝max(y
i|M(x
i,y
i,1))
S4, judge that bolt is whether loosening, its algorithm is:
In the time starting working, gather X
min0, X
max0, Y
min0, Y
max0,
At the new X of each acquisition
min, X
max, Y
min, Y
maxwhen value, with X
min0, X
max0, Y
min0, Y
max0compare, calculate Z=max{|X
min-X
min0|, | X
max-X
max0|, | Y
min-Y
min0|, | Y
max-Y
max0|,
In the time that Z is greater than setting value (in the present embodiment for 11mm), send alerting signal and start timing, as clocking value overtime threshold value 3min, and operating personnel are not while processing, and controller control mechanical vibration generator system quits work automatically.
Correspondingly, the present invention also provides a kind of mechanical vibration generator system securing member supervisory system, it is characterized in that, comprises initialization module, ccd video camera, A/D converter, processor, prior-warning device and controller,
Described initialization module, for carrying out initialization process to supervisory system;
Described ccd video camera, for gathering video image, described video image is made up of several two field pictures;
Described A/D converter, for the video signal of ccd video camera collection is converted into digital signal, and sends described digital signal to processor;
Described processor, it comprises smear elimination unit, extraction unit, computing unit, comparing unit, storage unit and output unit, described smear is eliminated unit the bolt in described digital signal image is carried out to smear elimination, described extraction unit extracts with the arbitrary two field picture in the video image after smear elimination algorithm elimination smear, distance between same mark on securing member in described computing unit calculating current state image and original state image, described comparing unit is compared the distance calculating and setting value, and then judge that whether the screw bolt and nut on mechanical vibration generator system is loosening, described storage unit is for the data of store video images and corresponding comparison result, and described output unit is used for exporting storage data and can carries out as required the inquiry of historical data and review,
Described prior-warning device, comprises forecast unit and judging unit, and described forecast unit is for reporting to the police and timing, and described judging unit is used for judging whether clocking value is greater than 3min, and then judges whether to start controller.
Described controller, for controlling mechanical vibration generator system.
Mechanical vibration generator system securing member supervisory system of the present invention and method for supervising thereof, have following beneficial effect:
1, the present invention is mechanical vibration generator system securing member supervisory system and the method for supervising thereof based on machine vision, supervisory system does not come in contact with mechanical vibration generator system, do not transform shape and the structure of mechanical vibration generator system first wife screw bolt and nut, only at the enterprising row labels of mechanical vibration generator system first wife nut, method simple practical.
2, with other, strict demand of video camera and complexity are required to compare, video camera of the present invention is common CCD camera, and cost is lower and meet under high frequency, large-amplitude vibration condition the loosening differentiation of securing member.
3, with imaging smear elimination algorithm, smear elimination is carried out in the round dot position on the nut in image, thereby extract the exact position of round dot on described nut, clearly show round dot on the nut true imaging under high frequency and large-amplitude vibration condition, be conducive to judge the loosening situation of screw bolt and nut.
4, by get a two field picture every 3 two field pictures in 10 two field pictures of current video image, can obtain continuous video image, monitor more accurately the loosening situation of screw bolt and nut.
5, when fixing identical being fixed when device of the screw bolt and nut with same size, can transfer the storage data of the storage unit in processor, thereby it is set to correlation parameter, as setting value, the time threshold etc. of distance, can also export storage data, carry out the inquiry of historical data and review, greatly improved work efficiency and increased the intelligent ability of supervising device, and handled easily personnel add up and inquire about different loosening situations.
6, carry out detecting and identifying by the image of the mark on securing member, at the beginning of securing member occurs to become flexible, just find in time, and alarm, notice associative operation personnel, exceeding the time limit while not processing, stop the work of mechanical vibration generator system automatically, have advantages of automatic identification, the method can thoroughly solve under mechanical vibration generator system high frequency and large amplitude condition the securing member accident that gets loose.
In another embodiment, can also not have smear to eliminate unit the mark 5 on securing member is carried out to smear elimination, can there is no data and the output unit output storage data of cell stores video image and corresponding comparison result and carry out the inquiry of historical data and review yet, or only have smear to eliminate unit, or only have storage unit and output unit, can also be not trail to eliminate unit and prior-warning device simultaneously.
In another embodiment, as shown in Figure 4, the mark 5 on described nut 2 can be different colours be mutually three round dots of 120 ° or the mark 5 of other shapes.
Above-mentioned securing member can also be other standards or non-standard bolt 1 or nut 2, can be also the securing member of other types, and the mark 5 on securing member can be the achieved any labels of those skilled in the art.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a mechanical vibration generator system securing member method for supervising, is characterized in that, described method utilizes mechanical vibration generator system securing member supervisory system to monitor the loosening situation of the securing member on mechanical vibration generator system, comprises the following steps:
S1, the securing member being fixed on mechanical vibration generator system is carried out to mark, or the securing member after mark is fixed on mechanical vibration generator system;
The video image of securing member under S2, collection stationary state, the two field picture in extraction video image is as original state image;
The video image of securing member under S3, collecting work state, the two field picture in extraction video image is as current state image;
S4, current state image and original state image are compared, calculate in two two field pictures the distance d between same mark on securing member,
S5, the distance d that step S4 is calculated and setting value s compare,
If d<s, judges that the securing member on current shaking table is not loosening, and returns to step S3,
If d >=s, judges that the securing member on current shaking table is loosening.
2. mechanical vibration generator system securing member method for supervising according to claim 1, it is characterized in that, in described step S3, before extracting video image, also comprise, use imaging smear elimination algorithm to carry out smear elimination to described video image, thereby obtain video image clearly.
3. mechanical vibration generator system securing member method for supervising according to claim 2, is characterized in that, after described step S5 is also included in and judges that securing member is loosening, and the data of the video image that storage gathers and corresponding comparison result.
4. according to the mechanical vibration generator system securing member method for supervising described in claim 2 or 3, it is characterized in that, if judge, the securing member on current shaking table is loosening, carries out following steps:
Send alerting signal and start timing, if clocking value is greater than the time threshold of setting, controls mechanical vibration generator system and quit work.
5. mechanical vibration generator system securing member method for supervising according to claim 4, is characterized in that, between described step S1 and S2, also comprise supervisory system is carried out to initialization process, and in step S2,
If do not extract original state image, judge that initialization process is unsuccessful, and again carry out initialization process,
If extract original state image, judge initialization process success, and carry out next step.
6. mechanical vibration generator system securing member method for supervising according to claim 5, it is characterized in that, in step S2 and S3, a described two field picture is specially in the arbitrary two field picture in extraction current video image or the n two field picture in current video image and extracts a two field picture every m two field picture, wherein n > m.
7. a mechanical vibration generator system securing member supervisory system, is characterized in that, comprises video camera, processor,
Described video camera, for gathering video image, described video image is made up of several two field pictures;
Described processor, comprise extraction unit, computing unit and comparing unit, described extraction unit is for extracting a two field picture from video image, described computing unit is for calculating the distance between same mark on current state image and original state image securing member, described comparing unit, for the distance calculating and setting value are compared, judges that whether the securing member on mechanical vibration generator system is loosening.
8. mechanical vibration generator system securing member supervisory system according to claim 7, is characterized in that, described processor also comprises smear elimination unit, and described smear is eliminated unit to carrying out smear elimination in described video image.
9. mechanical vibration generator system securing member supervisory system according to claim 8, is characterized in that, described supervisory system also comprises initialization module, prior-warning device and controller,
Described initialization module, for carrying out initialization process to supervisory system;
Described prior-warning device comprises forecast unit and judging unit, and described forecast unit is for reporting to the police and timing, and described judging unit is used for judging whether clocking value is greater than time threshold;
Described controller, quits work for controlling mechanical vibration generator system.
10. mechanical vibration generator system securing member supervisory system according to claim 9, it is characterized in that, described processor also comprises storage unit and output unit, described storage unit is for the data of video image and the corresponding comparison result of storage of collected, and described output unit is for exporting the data of cell stores.
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| CN109270078A (en) * | 2018-11-05 | 2019-01-25 | 广东溢达纺织有限公司 | The elastic state detection mechanism of forming machine fastener and its method |
| CN110068435A (en) * | 2018-01-23 | 2019-07-30 | 计算系统有限公司 | Vibration analysis system and method |
| CN110570472A (en) * | 2018-06-05 | 2019-12-13 | 成都精工华耀科技有限公司 | Fastener loosening detection method based on artificial marking image |
| CN112414683A (en) * | 2019-12-24 | 2021-02-26 | 湖南科技大学 | Mean mahalanobis distance-based loose bolt position positioning method and system |
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| CN113829038A (en) * | 2021-09-27 | 2021-12-24 | 无锡亚士德机械有限公司 | Simple force arm structure of non-standard automatic production equipment |
| CN113885386A (en) * | 2021-10-09 | 2022-01-04 | 无锡亚士德机械有限公司 | Force arm control management system for non-standard part automatic production |
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| CN112414683A (en) * | 2019-12-24 | 2021-02-26 | 湖南科技大学 | Mean mahalanobis distance-based loose bolt position positioning method and system |
| CN113570580A (en) * | 2021-07-30 | 2021-10-29 | 重庆予胜远升网络科技有限公司 | Power equipment part loosening identification system and method based on machine vision |
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| CN114923629A (en) * | 2022-04-29 | 2022-08-19 | 海门市苏洋机械制造有限公司 | Method for detecting vibration amplitude of spinning high-speed spindle during rotation |
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