CN204087498U - A kind of triple coil vehicle speed measuring system - Google Patents
A kind of triple coil vehicle speed measuring system Download PDFInfo
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- CN204087498U CN204087498U CN201420531704.7U CN201420531704U CN204087498U CN 204087498 U CN204087498 U CN 204087498U CN 201420531704 U CN201420531704 U CN 201420531704U CN 204087498 U CN204087498 U CN 204087498U
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- coil
- ground induction
- speed
- induction coils
- measuring system
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Abstract
The utility model relates to a kind of triple coil vehicle speed measuring system, it is characterized in that, comprises three ground induction coils be arranged on track, the wagon detector be connected with described three ground induction coils, and the candid photograph camera be connected with described wagon detector.Technique effect of the present utility model is, high-precision velocity-measuring system is constituted by three ground induction coils, three ground induction coils can form three groups of velocity coilses pair, coil 1 and coil 2 are a pair, coil 2 and coil 3 are a pair, coil 1 and coil 3 are a pair, three groups of speed can be measured, using the mean value of three groups of speed as the final speed of a motor vehicle measured, and reject possible misdata by data analysis, the utility model, compared with two traditional coil measurement systems, can measure speed more accurately.
Description
Technical field
The utility model belongs to intelligent transportation field, particularly a kind of triple coil vehicle speed measuring system.
Background technology
The general track of existing wagon detector uses two coils to test the speed, but is not enough to meet the problem of accurately and by mistake grabbing, judging by accident that tests the speed.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the utility model proposes a kind of triple coil vehicle speed measuring system, both having solved the problem of grabbing by mistake, judging by accident, make again to test the speed more accurate.
The technical scheme that the utility model proposes is as follows:
A kind of triple coil vehicle speed measuring system, is characterized in that, comprise three ground induction coils be arranged on track, the wagon detector be connected with described three ground induction coils, and the candid photograph camera be connected with described wagon detector.
Wherein, described wagon detector is made up of the ground induction coil oscillation module connected successively, PLD frequency digital coding module, single-chip microcomputer Digital I/O modular converter and ARM single-chip microcomputer calculation control module.
Wherein, the width of described three ground induction coils is 1.2 meters, and three ground induction coils are arranged in order, and the distance between first ground induction coil and second ground induction coil is 4 meters, and the distance between second ground induction coil and the 3rd ground induction coil is also 4 meters.
Technique effect of the present utility model is, high-precision velocity-measuring system is constituted by three ground induction coils, three ground induction coils can form three groups of velocity coilses pair, coil 1 and coil 2 are a pair, coil 2 and coil 3 are a pair, coil 1 and coil 3 are a pair, three groups of speed can be measured, using the mean value of three groups of speed as the final speed of a motor vehicle measured, and reject possible misdata by data analysis, the utility model, compared with two traditional coil measurement systems, can measure speed more accurately.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present utility model;
Fig. 2 is the structural representation of wagon detector of the present utility model;
Fig. 3 is the arrangement schematic diagram of ground induction coil of the present utility model.
Embodiment
Triple coil vehicle speed measuring system as described in Figure 1, comprises three ground induction coils be arranged on track, the wagon detector be connected with described three ground induction coils, and the candid photograph camera be connected with described wagon detector.
As shown in Figure 2, described wagon detector is made up of the ground induction coil oscillation module connected successively, PLD frequency digital coding module, single-chip microcomputer Digital I/O modular converter and ARM single-chip microcomputer calculation control module.Wherein, by PLD frequency digital coding module, the coil oscillation frequency that ground induction coil oscillation module produces is encoded, by single-chip microcomputer Digital I/O modular converter, coded signal is decoded again, after decoding, the IO digital switch level signal of generation standard, finally carries out logical process calculating by ARM single-chip microcomputer calculation control module to these switching signals.Three ground induction coils can form three groups of velocity coilses pair, ground induction coil 1 and ground induction coil 2 are a pair, ground induction coil 2 and ground induction coil 3 are a pair, ground induction coil 1 and ground induction coil 3 are a pair, three groups of speed can be measured, using the mean value of three groups of speed as the final speed of a motor vehicle measured, the utility model, compared with two traditional coil measurement systems, can measure speed more accurately.
As shown in Figure 3, the width of described three ground induction coils is 1.2 meters, and three ground induction coils are arranged in order, and the distance between first ground induction coil and second ground induction coil is 4 meters, and the distance between second ground induction coil and the 3rd ground induction coil is also 4 meters.
Use vehicle speed measuring system of the present utility model, when vehicle travels through three ground induction coils, three ground induction coils produce induced signal respectively, wagon detector carries out coded treatment combination to these three induced signals and calculates, and then automatically calculates correct data and captures camera as the vehicle detection candid photograph data stream transmitting of reality to relevant.
Concrete speed-measuring method is: the time of coil 1 is T1, the time of coil 2 is T2, the time of coil 3 is T3, distance between coil 1 coil 2 is S1, distance between coil 2 coil 3 is S2, and the distance between coil 1 to coil 3 is S3, then: vehicle velocity V 1=S1/ (T2-T1), V2=S2/ (T3-T2), V3=S3/ (T3-T1).
The error of the error of speed V1 to be the error of error delta V1, speed V2 be error delta V2, speed V3 is error delta V3.
The arithmetic mean of conventional repetitive measurement replaces true value, namely V=(V1+V2+V3)/3 in actual applications.
Because the measured value of three ground induction coils is in equal external condition, equal internal unit, draws in almost very short time interval, so these three velocity measurements are equal precision measurement, measuring error is Δ V1=V1-V, Δ V2=V2-V, Δ V3=V3-V, the value of three errors is very close, so speed average can be equivalent to true value, as last measured value, effectively eliminate stochastic error, improve test accuracy.If any one Δ V is greater than the threshold value of default, namely may be occur error result because the reasons such as coil checker is affected by the external environment cause velocity-measuring system to test the speed to this time, system will abandon process automatically, to avoid occurring grabbing by mistake, effectively maintain the fairness of test.
The utility model constitutes high-precision velocity-measuring system by three ground induction coils, three ground induction coils can form three groups of velocity coilses pair, coil 1 and coil 2 are a pair, coil 2 and coil 3 are a pair, and coil 1 and coil 3 are a pair, can measure three groups of speed, using the mean value of three groups of speed as the final speed of a motor vehicle measured, and reject possible misdata by data analysis, the utility model, compared with two traditional coil measurement systems, can measure speed more accurately.
Finally it should be noted that above embodiment only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment; those of ordinary skill in the field are to be understood that; still can modify to embodiment of the present utility model or carry out equivalent replacement to portion of techniques feature and do not depart from the spirit of technical solutions of the utility model, it all should be contained in the middle of the technical scheme scope of the utility model request protection.
Claims (3)
1. a triple coil vehicle speed measuring system, is characterized in that, comprises three ground induction coils be arranged on track, the wagon detector be connected with described three ground induction coils, and the candid photograph camera be connected with described wagon detector.
2. triple coil vehicle speed measuring system as claimed in claim 1, it is characterized in that, described wagon detector is made up of the ground induction coil oscillation module connected successively, PLD frequency digital coding module, single-chip microcomputer Digital I/O modular converter and ARM single-chip microcomputer calculation control module.
3. triple coil vehicle speed measuring system as claimed in claim 1 or 2, it is characterized in that, the width of described three ground induction coils is 1.2 meters, three ground induction coils are arranged in order, distance between first ground induction coil and second ground induction coil is 4 meters, and the distance between second ground induction coil and the 3rd ground induction coil is also 4 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420531704.7U CN204087498U (en) | 2014-09-15 | 2014-09-15 | A kind of triple coil vehicle speed measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420531704.7U CN204087498U (en) | 2014-09-15 | 2014-09-15 | A kind of triple coil vehicle speed measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204087498U true CN204087498U (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420531704.7U Expired - Fee Related CN204087498U (en) | 2014-09-15 | 2014-09-15 | A kind of triple coil vehicle speed measuring system |
Country Status (1)
| Country | Link |
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| CN (1) | CN204087498U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105448109A (en) * | 2015-12-29 | 2016-03-30 | 安徽海兴泰瑞智能科技有限公司 | Over-speed law violation capture system |
| CN112991769A (en) * | 2021-02-03 | 2021-06-18 | 中科视语(北京)科技有限公司 | Traffic volume investigation method and device based on video |
-
2014
- 2014-09-15 CN CN201420531704.7U patent/CN204087498U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105448109A (en) * | 2015-12-29 | 2016-03-30 | 安徽海兴泰瑞智能科技有限公司 | Over-speed law violation capture system |
| CN112991769A (en) * | 2021-02-03 | 2021-06-18 | 中科视语(北京)科技有限公司 | Traffic volume investigation method and device based on video |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20150915 |
|
| EXPY | Termination of patent right or utility model |