CN105590456B - A kind of earth magnetism threshold adjustment methods and system - Google Patents
A kind of earth magnetism threshold adjustment methods and system Download PDFInfo
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- CN105590456B CN105590456B CN201610111209.4A CN201610111209A CN105590456B CN 105590456 B CN105590456 B CN 105590456B CN 201610111209 A CN201610111209 A CN 201610111209A CN 105590456 B CN105590456 B CN 105590456B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
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Abstract
The present invention relates to a kind of earth magnetism threshold adjustment methods and system.Methods described includes：Step a：The geomagnetic data of corresponding test point is gathered by geomagnetic sensor, and geomagnetic data is forwarded to by geomagnetism detecting system by repeater；Step b：The geomagnetic data of repeater feeding is read by geomagnetism detecting system, the equipment state of geomagnetic sensor according to corresponding to original geomagnetic data judges the geomagnetic data, and will determine that the equipment state for the geomagnetic sensor that result returns with hardware logic judging unit is contrasted；Step c：Geomagnetic data is added in the nearest processing queue of corresponding test point, calculate the error of processing queue recently, and judge whether the error of processing queue recently is more than acceptable error set in advance, if the error of processing queue recently is more than acceptable error set in advance, earth magnetism threshold value corresponding to the geomagnetic sensor is recalculated.The present invention improves the recognition accuracy of geomagnetic sensor state, and eliminates the hysteresis quality of earth magnetism adjusting thresholds.
Description
Technical field
The invention belongs to earth magnetism thresholding-techniques field, more particularly to a kind of earth magnetism threshold adjustment methods and system.
Background technology
Earth magnetism wagon detector is mounted in the sensor of road surface, monitoring specifically for vehicle flow and speed,
Control traffic signals conversion and traffic offence monitoring record.Earth magnetism wagon detector is a kind of vehicle dynamic of monitoring in real time, is implemented
The infrastructure of intelligent traffic management.Data collecting system plays very important effect, earth magnetism in traffic surveillance and control system
Sensor is the key component of data collecting system, and the performance of sensor plays a decisive role to the accuracy of data collecting system.
Earth magnetism receiver (trunking) is primarily used to coordinate with earth magnetism terminal, completes the reception and processing of data.
In the prior art, geomagnetism detecting system tends not to timely and effectively adjust earth magnetism according to environmental condition change in time
Threshold model, recognition accuracy are limited.(heavy truck is carried out such as around equipment temporarily) in the case where environmental change is big
Error rate is higher, limits existing geomagnetism detecting systematic difference scope.
The content of the invention
The invention provides a kind of earth magnetism threshold adjustment methods and system, it is intended at least solves existing skill to a certain extent
Above mentioned problem in art.
Implementation of the present invention is as follows, a kind of earth magnetism threshold adjustment methods, comprises the following steps：
Step a：The geomagnetic data of corresponding test point is gathered by geomagnetic sensor, and is turned geomagnetic data by repeater
It is sent to geomagnetism detecting system；
Step b：The geomagnetic data of repeater feeding is read by geomagnetism detecting system, judging according to original geomagnetic data should
The equipment state of geomagnetic sensor corresponding to geomagnetic data, and will determine that result passes with the earth magnetism that hardware logic judging unit returns
The equipment state of sensor is contrasted, if two equipment states misfit, the equipment state of the geomagnetic sensor is considered as can
Adjustment state；
Step c：Geomagnetic data is added in the nearest processing queue of corresponding test point, calculate the mistake of processing queue recently
Difference, and judge whether the error of processing queue recently is more than acceptable error set in advance, if the mistake of the queue of processing recently
Difference is more than acceptable error set in advance, and the geomagnetic sensor is recalculated according to the earth magnetism threshold value being calculated for the last time
Corresponding earth magnetism threshold value.
The technical scheme that the embodiment of the present invention is taken also includes：Also include before the step a：Configure geomagnetism detecting system
Systematic parameter；The configuration systematic parameter includes maximum relative error, minimum deflection Dl, maximum deviation Du, a, b, c, k, m and n,
Adjusting thresholds model is as follows：
Dl<G(x,y,z)<Du
In above-mentioned formula, G (x, y, z)=kxa+myb+nzc, a is greater than the real number equal to 0, and b is greater than the reality equal to 0
Number, c are greater than the real number equal to 0, and k is greater than the natural number equal to 1, and m is greater than the natural number equal to 1, and n is greater than being equal to 1
Natural number, x, y, z be ground geomagnetic data.
The technical scheme that the embodiment of the present invention is taken also includes：Also include before the step a：Connect earth magnetism sensing front end system
The geomagnetic sensor and repeater of system, it is ensured that the geomagnetic data collected effectively can be delivered to ground by earth magnetism sensing front end system
Magnetic detection system.
The technical scheme that the embodiment of the present invention is taken also includes：In the step b, during the geomagnetism detecting system is read
After the geomagnetic data that device is sent into, the equipment state tool of geomagnetic sensor according to corresponding to original geomagnetic data judges the geomagnetic data
Body includes：For each test point, geomagnetism detecting system receives the 5 tuple geomagnetic datas that its corresponding geomagnetic sensor returns,
Initial decision function G (x, y, z) is built first, as the input of geomagnetic data judges whether the adjusting thresholds model is set up,
If adjusting thresholds model set up, the geomagnetic sensor state for meeting adjusting thresholds model is designated as it is occupied, if threshold value adjust
Integral mould is invalid, and the geomagnetic sensor state for not meeting adjusting thresholds model is designated as into the free time.
The technical scheme that the embodiment of the present invention is taken also includes：The step c also includes：It is nearest when there is geomagnetic data to add
When handling queue, whether the equipment state for judging geomagnetic sensor corresponding to the geomagnetic data is adjustable state, if not
Adjustable state, judges whether processing queue recently reaches predetermined length；If adjustable state, then processing team recently is calculated
The error of row.
The technical scheme that the embodiment of the present invention is taken also includes：The step c also includes：Whether judge processing queue recently
Reach predetermined length, if being not reaching to predetermined length, continue to read the geomagnetic data that repeater is sent into；If reach pre- fixed length
Degree, then calculate the error of processing queue recently.
Another technical scheme that the embodiment of the present invention is taken is：Before a kind of earth magnetism adjusting thresholds system, including earth magnetism sensing
End system and geomagnetism detecting system, earth magnetism sensing front end system include geomagnetic sensor, hardware logic judging unit and in
After device, geomagnetic sensor and hardware logic judging unit are connected with repeater signal respectively, and repeater connects with geomagnetism detecting system
Connect；
The geomagnetic sensor is used for the geomagnetic data for gathering corresponding test point；
The hardware logic judging unit is used for the equipment state for judging geomagnetic sensor；
The data that the repeater is used between geomagnetic sensor and hardware logic judging unit and geomagnetism detecting system connect
Receive and forward；
The geomagnetism detecting system is used for the geomagnetic data for reading repeater feeding, judges the ground according to original geomagnetic data
The equipment state of geomagnetic sensor corresponding to magnetic data, and will determine that result senses with the earth magnetism that hardware logic judging unit returns
The equipment state of device is contrasted, if two equipment states misfit, the equipment state of the geomagnetic sensor is considered as adjustable
Whole state；And add geomagnetic data in the nearest processing queue of corresponding test point, the error of processing queue recently is calculated, is judged
Whether the error of processing queue recently is more than acceptable error set in advance, if the error of processing queue recently is more than advance
The acceptable error of setting, the earth magnetism according to corresponding to the earth magnetism threshold value being calculated for the last time recalculates the geomagnetic sensor
Threshold value.
The technical scheme that the embodiment of the present invention is taken also includes：The geomagnetism detecting system also include parameter configuration module,
Data read module, the first judge module, the second judge module, error calculating module and threshold calculation module；
The parameter configuration module is used for the systematic parameter for configuring geomagnetism detecting system；
The data read module is used for the geomagnetic data for reading repeater feeding, judges the ground according to original geomagnetic data
The equipment state of geomagnetic sensor corresponding to magnetic data, and will determine that result senses with the earth magnetism that hardware logic judging unit returns
The equipment state of device is contrasted, if two equipment states misfit, the equipment state of the geomagnetic sensor is considered as adjustable
Whole state；
First judge module is used to add geomagnetic data in the nearest processing queue of corresponding test point, and judges to be somebody's turn to do
Whether the equipment state of geomagnetic sensor corresponding to geomagnetic data is adjustable state, if not adjustable state, passes through
Two judge modules judge whether processing queue recently reaches predetermined length, if adjustable state, pass through error calculating module
Calculate the error of processing queue recently；
Second judge module is used to judge to handle whether queue reaches predetermined length recently, if be not reaching to predetermined
Length, then data read module continue read repeater be sent into geomagnetic data；If reaching predetermined length, pass through error calculation
Module calculates the error of processing queue recently；
The error calculating module is used to calculate the error of processing queue recently, and the error of judgement processing queue recently is
It is no to be more than acceptable error set in advance, if the error of processing queue recently is not more than acceptable error set in advance,
Judged result is then exported to next stage system；If the error of processing queue recently is more than acceptable error set in advance, lead to
Cross threshold calculation module and recalculate earth magnetism threshold value；
The threshold calculation module is used to recalculate earth magnetism sensing according to the earth magnetism threshold value being calculated for the last time
Earth magnetism threshold value corresponding to device, untill error is less than maximum acceptable error.
The technical scheme that the embodiment of the present invention is taken also includes：The configuration systematic parameter includes maximum relative error, most
Little deviation Dl, maximum deviation Du, a, b, c, k, m and n, adjusting thresholds model are as follows：
Dl<G(x,y,z)<Du
In above-mentioned formula, G (x, y, z)=kxa+myb+nzc, a is greater than the real number equal to 0, and b is greater than the reality equal to 0
Number, c are greater than the real number equal to 0, and k is greater than the natural number equal to 1, and m is greater than the natural number equal to 1, and n is greater than being equal to 1
Natural number, x, y, z be ground geomagnetic data.
The technical scheme that the embodiment of the present invention is taken also includes：The data read module reads the earth magnetism that repeater is sent into
Data, the equipment state of geomagnetic sensor specifically includes according to corresponding to original geomagnetic data judges the geomagnetic data：For every
One test point, geomagnetism detecting system receive the 5 tuple geomagnetic datas that its corresponding geomagnetic sensor returns, and structure first is initially sentenced
Disconnected function G (x, y, z), as the input of geomagnetic data judges whether the adjusting thresholds model is set up, if adjusting thresholds mould
Type set up, the geomagnetic sensor state for meeting adjusting thresholds model is designated as it is occupied, if adjusting thresholds model is invalid, will
The geomagnetic sensor state for not meeting adjusting thresholds model is designated as the free time.
The earth magnetism threshold adjustment methods and system of the embodiment of the present invention read what repeater was sent into by geomagnetism detecting system
Geomagnetic data, the equipment state of geomagnetic sensor according to corresponding to original geomagnetic data judges the geomagnetic data, and will judge to tie
The equipment state for the geomagnetic sensor that fruit returns with hardware logic judging unit is contrasted, and improves geomagnetic sensor state
Recognition accuracy；And based on existing adaptive adjustment model, it is possible to achieve the quick adjustment of earth magnetism threshold value, eliminate earth magnetism threshold
It is worth the hysteresis quality of adjustment.
Brief description of the drawings
Fig. 1 is the flow chart of the earth magnetism threshold adjustment methods of the embodiment of the present invention；
Fig. 2 is the structural representation of the earth magnetism threshold adjustment methods of the embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, it is the flow chart of the earth magnetism threshold adjustment methods of the embodiment of the present invention.The earth magnetism of the embodiment of the present invention
Threshold adjustment methods comprise the following steps：
Step 100：Configure the systematic parameter of geomagnetism detecting system；
In step 100, systematic parameter can obtain from objects outside, can also be read from XML configuration files, read
The parameter arrived is as system primary condition；Configure systematic parameter include maximum relative error, minimum deflection Dl, maximum deviation Du,
A, b, c, k, m and n, adjusting thresholds model are as follows：
Dl<G(x,y,z)<Du (1)
In formula (1), G (x, y, z)=kxa+myb+nzc, a is greater than the real number equal to 0, and b is greater than the reality equal to 0
Number, c are greater than the real number equal to 0, and k is greater than the natural number equal to 1, and m is greater than the natural number equal to 1, and n is greater than being equal to 1
Natural number, x, y, z be ground geomagnetic data.
Step 200：Connect the geomagnetic sensor and repeater of earth magnetism sensing front end system, it is ensured that earth magnetism senses front end system
The geomagnetic data collected can be effectively delivered to geomagnetism detecting system；
In step 200, earth magnetism sensing front end system includes geomagnetic sensor, repeater and hardware logic judging unit
It is used for the geomagnetic data for gathering corresponding test point Deng, geomagnetic sensor, hardware logic judging unit is used to judge geomagnetic sensor
Equipment state (such as taken or available), repeater is used for geomagnetic sensor and hardware logic judging unit and ground
Data receiver and forwarding between magnetic detection system.
Step 300：The geomagnetic data of corresponding test point is gathered by geomagnetic sensor, by the geomagnetic data of collection transmit to
Repeater, and geomagnetic data is forwarded to by geomagnetism detecting system by repeater；
Step 400：The geomagnetic data of repeater feeding is read by geomagnetism detecting system, is judged according to original geomagnetic data
The equipment state of geomagnetic sensor corresponding to the geomagnetic data, and will determine that the earth magnetism that result returns with hardware logic judging unit
The equipment state of sensor is contrasted, if two equipment states misfit, performs step 500；If two equipment states
It coincide, performs step 600；
In step 400, for each test point, geomagnetism detecting system receives 5 that its corresponding geomagnetic sensor returns
Tuple geomagnetic data (magn_x, magn_y, magn_z, physic_state, timestamp), initial decision letter is built first
Number G (x, y, z), as the input of geomagnetic data judges whether above-mentioned formula (1) is set up, if formula (1) is set up, public affairs will be met
The geomagnetic sensor state of formula (1) is designated as occupied (taken), if formula (1) is invalid, will not meet the ground of formula (1)
Magnetic Sensor state is designated as idle (available).
Step 500：The equipment state of the geomagnetic sensor is considered as adjustable state；
Step 600：Geomagnetic data is added in the nearest processing queue of corresponding test point, and judge that the geomagnetic data is corresponding
The equipment state of geomagnetic sensor whether be adjustable state, if not adjustable state, perform step 700, if
Adjustable state, perform step 800；
In step 600, geomagnetism detecting system establishes one upon actuation, to test point corresponding to each geomagnetic sensor
Processing queue (last recent processed queue, LRP queue) recently, queue is handled recently and preserves current earth magnetism
The geomagnetic data that sensor treats recently, queue is handled recently and keeps constant size, is joined the team out team according to first-in first-out rule,
When being joined the team the geomagnetic data for having adjustable state, the error of a current queue is calculated, after queue reaches predetermined length,
The calculation error when each geomagnetic data goes out group, if error is more than acceptable error set in advance, according to last time
The earth magnetism threshold value being calculated is readjusted, and untill reaching receptive phase, after geomagnetic data goes out team, is output to down
Level system is handled.
Step 700：Judge whether processing queue recently reaches predetermined length, if being not reaching to predetermined length, continue to hold
Row step 400；If reaching predetermined length, step 800 is performed；
In step 700, the predetermined length of the queue of processing recently refers to handle preservable earth magnetism in queue recently
The quantity of data, in embodiments of the present invention, queue with can preserving treated recently 5 groups of respective sensor magnetic number is handled recently
According to specific queue length can also be set or be adjusted according to practical application.
Step 800：The error of processing queue recently is calculated, and judges whether the error of processing queue recently is more than and sets in advance
Fixed acceptable error, if the error of processing queue recently is not more than acceptable error set in advance, perform step 900；
If the error of processing queue recently is more than acceptable error set in advance, step 1000 is performed；
Step 900：Judged result is exported to next stage system；
Step 1000：Earth magnetism threshold value according to being calculated for the last time recalculate the geomagnetic sensor corresponding to earth magnetism
Threshold value, untill error is less than maximum acceptable error.
In step 1000, the calculation for calculating earth magnetism threshold value is prior art, and the present invention will not be described in great detail.
Referring to Fig. 2, it is the structural representation of the earth magnetism adjusting thresholds system of the embodiment of the present invention.The embodiment of the present invention
Earth magnetism adjusting thresholds system includes earth magnetism sensing front end system and geomagnetism detecting system, and earth magnetism senses front end system and passed including earth magnetism
Sensor, hardware logic judging unit and repeater, geomagnetic sensor and hardware logic judging unit connect with repeater signal respectively
Connect, repeater is connected with geomagnetism detecting system；Specifically：
Geomagnetic sensor is used for the geomagnetic data for gathering corresponding test point；
Hardware logic judging unit is used for the equipment state for judging geomagnetic sensor；
Repeater be used for data receiver between geomagnetic sensor and hardware logic judging unit and geomagnetism detecting system and
Forwarding；
Geomagnetism detecting system include parameter configuration module, data read module, the first judge module, the second judge module,
Error calculating module and threshold calculation module；
Parameter configuration module is used for the systematic parameter for configuring geomagnetism detecting system；Wherein, systematic parameter can be from outer bound pair
As obtaining, can also be read from XML configuration file, the parameter read is as system primary condition；Configuration systematic parameter includes
Maximum relative error, minimum deflection Dl, maximum deviation Du, a, b, c, k, m and n, adjusting thresholds model are as follows：
Dl<G(x,y,z)<Du (1)
In formula (1), G (x, y, z)=kxa+myb+nzc, a is greater than the real number equal to 0, and b is greater than the reality equal to 0
Number, c are greater than the real number equal to 0, and k is greater than the natural number equal to 1, and m is greater than the natural number equal to 1, and n is greater than being equal to 1
Natural number, x, y, z be ground geomagnetic data.
Data read module is used for the geomagnetic data for reading repeater feeding, judges the ground magnetic number according to original geomagnetic data
According to the equipment state of corresponding geomagnetic sensor, and it will determine that the geomagnetic sensor that result returns with hardware logic judging unit
Equipment state is contrasted, if two equipment states misfit, the equipment state of the geomagnetic sensor is considered as into adjustable shape
State；Wherein, for each test point, geomagnetism detecting system receives the 5 tuple geomagnetic datas that its corresponding geomagnetic sensor returns
(magn_x, magn_y, magn_z, physic_state, timestamp), initial decision function G (x, y, z) is built first,
As the input of geomagnetic data judges whether above-mentioned formula (1) is set up, if formula (1) is set up, by the ground of coincidence formula (1)
Magnetic Sensor state is designated as occupied (taken), if formula (1) is invalid, will not meet the geomagnetic sensor shape of formula (1)
State is designated as idle (available).
First judge module is used to add geomagnetic data in the nearest processing queue of corresponding test point, and judges the earth magnetism
Whether the equipment state of geomagnetic sensor corresponding to data is adjustable state, if not adjustable state, is sentenced by second
Disconnected module judges whether processing queue recently reaches predetermined length, if adjustable state, is calculated by error calculating module
The error of processing queue recently；Wherein, geomagnetism detecting system upon actuation, is established to test point corresponding to each geomagnetic sensor
One processing queue recently, queue is handled recently and preserves the geomagnetic data that current geomagnetic sensor treats recently, recently processing
Queue keeps constant size, is joined the team out team according to first-in first-out rule, when being joined the team the geomagnetic data for having adjustable state, meter
The error of a current queue is calculated, after queue reaches predetermined length, the calculation error when each geomagnetic data goes out group, if by mistake
Difference is more than acceptable error set in advance, then the earth magnetism threshold value being calculated according to last time is readjusted, until reaching
Untill receptive phase, after geomagnetic data goes out team, it is output to next stage system and is handled.
Second judge module is used to judge to handle whether queue reaches predetermined length recently, if being not reaching to pre- fixed length
Spend, then data read module continues to read the geomagnetic data that repeater is sent into；If reaching predetermined length, pass through error calculation mould
Block calculates the error of processing queue recently；Wherein, refer to handle recently can in queue for the predetermined length of the queue of processing recently
The quantity of the geomagnetic data of preservation, in embodiments of the present invention, processing queue recently can preserve respective sensor and treat recently
5 groups of geomagnetic datas, specific queue length can also be set or be adjusted according to practical application.
Error calculating module is used to calculate the error of processing queue recently, and judges whether the error of processing queue recently is big
It is defeated if the error of processing queue recently is not more than acceptable error set in advance in acceptable error set in advance
Go out judged result to next stage system；If the error of processing queue recently is more than acceptable error set in advance, pass through threshold
Value computing module recalculates earth magnetism threshold value；
Threshold calculation module is used to recalculate the geomagnetic sensor pair according to the earth magnetism threshold value being calculated for the last time
The earth magnetism threshold value answered, untill error is less than maximum acceptable error.
The earth magnetism threshold adjustment methods and system of the embodiment of the present invention read what repeater was sent into by geomagnetism detecting system
Geomagnetic data, the equipment state of geomagnetic sensor according to corresponding to original geomagnetic data judges the geomagnetic data, and will judge to tie
The equipment state for the geomagnetic sensor that fruit returns with hardware logic judging unit is contrasted, and improves geomagnetic sensor state
Recognition accuracy；And based on existing adaptive adjustment model, it is possible to achieve the quick adjustment of earth magnetism threshold value, eliminate earth magnetism threshold
It is worth the hysteresis quality of adjustment.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of earth magnetism threshold adjustment methods, comprise the following steps：
Step a：The geomagnetic data of corresponding test point is gathered by geomagnetic sensor, and is forwarded to geomagnetic data by repeater
Geomagnetism detecting system；
Step b：The geomagnetic data of repeater feeding is read by geomagnetism detecting system, the earth magnetism is judged according to original geomagnetic data
The equipment state of geomagnetic sensor corresponding to data, and will determine that the geomagnetic sensor that result returns with hardware logic judging unit
Equipment state contrasted, if two equipment states misfit, the equipment state of the geomagnetic sensor is considered as adjustable
State；
Step c：Geomagnetic data is added in the nearest processing queue of corresponding test point, calculate the error of processing queue recently, and
Judge whether the error of processing queue recently is more than acceptable error set in advance, if the error of the queue of processing recently is more than
Acceptable error set in advance, according to corresponding to the earth magnetism threshold value being calculated for the last time recalculates the geomagnetic sensor
Earth magnetism threshold value.
2. earth magnetism threshold adjustment methods according to claim 1, it is characterised in that also include before the step a：Configuration ground
The systematic parameter of magnetic detection system；It is described configuration systematic parameter include maximum relative error, minimum deflection Dl, maximum deviation Du,
A, b, c, k, m and n, adjusting thresholds model are as follows：
Dl<G(x,y,z)<Du
In above-mentioned formula, G (x, y, z)=kxa+myb+nzc, a is greater than the real number equal to 0, and b is greater than the real number equal to 0, c
Be greater than the real number equal to 0, k is greater than the natural number equal to 1, and m is greater than the natural number equal to 1, n be greater than equal to 1 from
So number, x, y, z is geomagnetic data.
3. earth magnetism threshold adjustment methods according to claim 2, it is characterised in that also include before the step a：Connection ground
Magnetic senses the geomagnetic sensor and repeater of front end system, it is ensured that the geomagnetic data that earth magnetism sensing front end system will can collect
Effectively it is delivered to geomagnetism detecting system.
4. earth magnetism threshold adjustment methods according to claim 3, it is characterised in that in the step b, the earth magnetism inspection
Examining system reads the geomagnetic data that repeater is sent into, the geomagnetic sensor according to corresponding to original geomagnetic data judges the geomagnetic data
Equipment state specifically include：For each test point, geomagnetism detecting system receives 5 yuan that its corresponding geomagnetic sensor returns
Group geomagnetic data, builds initial decision function G (x, y, z), as the input of geomagnetic data judges the adjusting thresholds mould first
Whether type is set up, if adjusting thresholds model set up, the geomagnetic sensor state for meeting adjusting thresholds model is designated as it is occupied,
If adjusting thresholds model is invalid, the geomagnetic sensor state for not meeting adjusting thresholds model is designated as the free time.
5. earth magnetism threshold adjustment methods according to claim 4, it is characterised in that the step c also includes：When there is earth magnetism
When data add processing queue recently, whether the equipment state for judging geomagnetic sensor corresponding to the geomagnetic data is adjustable shape
State, if not adjustable state, judge whether processing queue recently reaches predetermined length；If adjustable state, then count
Calculate the error of processing queue recently.
6. earth magnetism threshold adjustment methods according to claim 5, it is characterised in that the step c also includes：Judge nearest
Whether processing queue reaches predetermined length, if being not reaching to predetermined length, continues to read the geomagnetic data that repeater is sent into；Such as
Fruit reaches predetermined length, then calculates the error of processing queue recently.
A kind of 7. earth magnetism adjusting thresholds system, it is characterised in that front end system and geomagnetism detecting system are sensed including earth magnetism, it is described
Earth magnetism sensing front end system includes geomagnetic sensor, hardware logic judging unit and repeater, geomagnetic sensor and hardware logic
Judging unit is connected with repeater signal respectively, and repeater is connected with geomagnetism detecting system；
The geomagnetic sensor is used for the geomagnetic data for gathering corresponding test point；
The hardware logic judging unit is used for the equipment state for judging geomagnetic sensor；
The repeater be used for data receiver between geomagnetic sensor and hardware logic judging unit and geomagnetism detecting system and
Forwarding；
The geomagnetism detecting system is used for the geomagnetic data for reading repeater feeding, judges the ground magnetic number according to original geomagnetic data
According to the equipment state of corresponding geomagnetic sensor, and it will determine that the geomagnetic sensor that result returns with hardware logic judging unit
Equipment state is contrasted, if two equipment states misfit, the equipment state of the geomagnetic sensor is considered as into adjustable shape
State；And add geomagnetic data in the nearest processing queue of corresponding test point, the error of processing queue recently is calculated, is judged nearest
Whether the error of processing queue is more than acceptable error set in advance, is preset if the error of processing queue recently is more than
Acceptable error, the earth magnetism threshold according to corresponding to the earth magnetism threshold value being calculated for the last time recalculates the geomagnetic sensor
Value.
8. earth magnetism adjusting thresholds system according to claim 7, it is characterised in that the geomagnetism detecting system also includes ginseng
Number configuration module, data read module, the first judge module, the second judge module, error calculating module and threshold calculation module；
The parameter configuration module is used for the systematic parameter for configuring geomagnetism detecting system；
The data read module is used for the geomagnetic data for reading repeater feeding, judges the ground magnetic number according to original geomagnetic data
According to the equipment state of corresponding geomagnetic sensor, and it will determine that the geomagnetic sensor that result returns with hardware logic judging unit
Equipment state is contrasted, if two equipment states misfit, the equipment state of the geomagnetic sensor is considered as into adjustable shape
State；
First judge module is used to add geomagnetic data in the nearest processing queue of corresponding test point, and judges the earth magnetism
Whether the equipment state of geomagnetic sensor corresponding to data is adjustable state, if not adjustable state, is sentenced by second
Disconnected module judges whether processing queue recently reaches predetermined length, if adjustable state, is calculated by error calculating module
The error of processing queue recently；
Second judge module is used to judge to handle whether queue reaches predetermined length recently, if being not reaching to pre- fixed length
Spend, then data read module continues to read the geomagnetic data that repeater is sent into；If reaching predetermined length, pass through error calculation mould
Block calculates the error of processing queue recently；
The error calculating module is used to calculate the error of processing queue recently, and judges whether the error of processing queue recently is big
It is defeated if the error of processing queue recently is not more than acceptable error set in advance in acceptable error set in advance
Go out judged result to next stage system；If the error of processing queue recently is more than acceptable error set in advance, pass through threshold
Value computing module recalculates earth magnetism threshold value；
The threshold calculation module is used to recalculate the geomagnetic sensor pair according to the earth magnetism threshold value being calculated for the last time
The earth magnetism threshold value answered, untill error is less than maximum acceptable error.
9. earth magnetism adjusting thresholds system according to claim 8, it is characterised in that the configuration systematic parameter includes maximum
Relative error, minimum deflection Dl, maximum deviation Du, a, b, c, k, m and n, adjusting thresholds model are as follows：
Dl<G(x,y,z)<Du
In above-mentioned formula, G (x, y, z)=kxa+myb+nzc, a is greater than the real number equal to 0, and b is greater than the real number equal to 0, c
Be greater than the real number equal to 0, k is greater than the natural number equal to 1, and m is greater than the natural number equal to 1, n be greater than equal to 1 from
So number, x, y, z is geomagnetic data.
10. earth magnetism adjusting thresholds system according to claim 9, it is characterised in that during the data read module is read
After the geomagnetic data that device is sent into, the equipment state tool of geomagnetic sensor according to corresponding to original geomagnetic data judges the geomagnetic data
Body includes：For each test point, geomagnetism detecting system receives the 5 tuple geomagnetic datas that its corresponding geomagnetic sensor returns,
Initial decision function G (x, y, z) is built first, as the input of geomagnetic data judges whether the adjusting thresholds model is set up,
If adjusting thresholds model set up, the geomagnetic sensor state for meeting adjusting thresholds model is designated as it is occupied, if threshold value adjust
Integral mould is invalid, and the geomagnetic sensor state for not meeting adjusting thresholds model is designated as into the free time.
Priority Applications (1)
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| CN112767712A (en) * | 2019-11-04 | 2021-05-07 | 深圳长城开发科技股份有限公司 | Method, system and storage medium for geomagnetic sensor to detect fast passing vehicle |
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