CN203464988U - Dynamic vehicle weighing and speed detection device - Google Patents
Dynamic vehicle weighing and speed detection device Download PDFInfo
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- CN203464988U CN203464988U CN201320551217.2U CN201320551217U CN203464988U CN 203464988 U CN203464988 U CN 203464988U CN 201320551217 U CN201320551217 U CN 201320551217U CN 203464988 U CN203464988 U CN 203464988U
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Abstract
The utility model discloses a dynamic vehicle weighing and speed detection device. The dynamic vehicle weighing and speed detection device comprises a micro computer, a pressure sensor, a signal conditioning circuit, an A/D conversion circuit, a D/A conversion circuit, a keyboard and a liquid crystal display, wherein an input end of the micro computer is respectively connected with the A/D conversion circuit and a keyboard interface circuit, an output end of the micro computer is respectively connected with the liquid crystal display and the D/A conversion circuit, the A/D conversion circuit is connected with the signal conditioning circuit, and the signal conditioning circuit is further connected with a signal output end of the pressure sensor. The dynamic vehicle weighing and speed detection device has advantages of simple structure, high dynamic weighing precision and automatic vehicle speed detection and has functions of displaying and alarming.
Description
Technical field
The utility model relates to a kind of vehicle dynamic weighing and vehicle speed detector device, is specifically related to the device under a kind of normal traffic states, travel on road vehicle weighing and speed being detected.
Background technology
Along with the high speed development of Chinese national economy, automobile pollution is increasing, and traffic volume of highway increases rapidly, and the overload of vehicle and driving over the speed limit can cause highway, bridge to be subjected to havoc and cause traffic hazard.Monitoring and management that vehicle dynamic weighing and vehicle speed detector device can be used for overload of vehicle and drive over the speed limit are the ideal equipment of traffic administration.
Utility model content
The purpose of this utility model be to provide a kind of simple in structure, dynamic weighing precision is high, the speed of a motor vehicle detects automatically, show and vehicle dynamic weighing and the speed detector of warning function.
The technical solution adopted in the utility model is: this vehicle dynamic weighing and vehicle speed detector device, comprise microcomputer, pressure transducer, signal conditioning circuit, A/D change-over circuit, D/A change-over circuit, keyboard and liquid crystal display.The input end of described microcomputer is connected to respectively A/D change-over circuit and keyboard interface circuit, the output terminal of microcomputer is connected to respectively liquid crystal display and D/A change-over circuit, described A/D change-over circuit connects signal conditioning circuit, and described signal conditioning circuit is also connected with the signal output part of pressure transducer.
In technique scheme, described microcomputer adopts industrial control computer, and described pressure transducer adopts bended plate type strain transducer.
In technique scheme, described signal conditioning circuit is comprised of high-precision amplifying AD620 and high-precision low-drift operational amplifier OP07.
In technique scheme, described A/D circuit adopts AD plate PCL-818H, and described D/A circuit adopts DA plate DAC-727.
Technique effect of the present utility model is: the utility model can be applied to the occasions such as automatic traffic investigation, Fare Collection System, traffic safety management, carries out real-time vehicle management and carries out Transportation Strategies, as overloaded vehicle unloaded and imposing a fine.Overcome the mistakes and omissions that manual method easily occurs, reduce labour intensity, increase work efficiency.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is pressure transducer scheme of installation of the present utility model.
Fig. 3 is electric bridge bridge box elementary diagram of the present utility model.
Fig. 4 is signal conditioning circuit figure of the present utility model.
Embodiment
Referring to Fig. 1, whole system is comprised of microcomputer, pressure transducer, signal conditioning circuit, A/D circuit, D/A circuit, keyboard and liquid crystal display.The input end of described microcomputer is connected to respectively A/D change-over circuit and keyboard interface circuit, the output terminal of microcomputer is connected to respectively liquid crystal display and D/A change-over circuit, described A/D change-over circuit connects signal conditioning circuit, and described signal conditioning circuit is also connected with the signal output part of pressure transducer.
Be arranged on the pressure information that pressure transducer on highway crosses sensor pressure wheel and become voltage signal output, again simulation small voltage after filtering, amplify, by A/D change-over circuit, become digital signal, as sampled value, delivering to microcomputer processes, calculate the weight of pressing sensor wheel, send display to demonstrate detection data, data are sent in storer and saved simultaneously, to further process.The parameter that system will be calculated has each wheel wheel load, every axle axle weight, car weight, the number of axle, wheelbase, vehicle, speed and acceleration etc.
Fig. 2 is pressure transducer scheme of installation of the present utility model, and track is wide is generally 3.75 meters, three pressure transducers for each track, and every sensor is grown 1.25 meters, and wide 0.2 meter, installation of sensors fore-and-aft clearance is 3 meters.The mistiming of pressing front and back sensor by detecting front-wheel (or trailing wheel), according to V=L/T, can calculate the speed of a motor vehicle (wherein V is Vehicle Speed, and L is the spacing of front and back sensor, and T is the mistiming).By computing machine, sensor signal is carried out to Real-time Collection, obtain pressing the mistiming of sensor front and back wheel, can calculate the wheelbase of this car, and several axles, thereby which kind of vehicle judgement is.
Referring to Fig. 3, electric bridge bridge box the inside is comprised of the additional balanced potentiometer of three arm resistances of common electric bridge, with pressure transducer, forms a null-type bridge circuit.When vehicle is pressed on sensor, the distortion of sensor upper plate, sensor the inside foil gauge resistance value becomes large.Sensor is equivalent to an arm resistance to be received in electric bridge, according to bridge balance principle, U
oexport a voltage signal being directly proportional to wheel weight.
Fig. 4 is the signal conditioning circuit figure of a passage of the utility model.Signal conditioning circuit Main Function is that the weak voltage signals of bridge box output is amplified.AD620 is a low cost, high-precision meter amplifier, only needs a non-essential resistance that gain is set, and gain margin is 1 to 1000, is particularly suitable for high electrical resistance value, compared with the pressure sensor circuit design of low supply voltage.OP07 is high-precision low-drift operational amplifier, and input offset voltage is 10uV, and offset voltage temperature coefficient is 0.2uV/%, without external compensation and external protecting component.In figure, AD620 and external controlling resistance RG form 1000 times of amplifying circuits, and U2 forms third-order low-pass filter, and U3 is 10 times of amplifying circuits.
Claims (4)
1. a vehicle dynamic weighing and vehicle speed detector device, comprise microcomputer, pressure transducer, signal conditioning circuit, A/D change-over circuit, D/A change-over circuit, keyboard and liquid crystal display, the input end of described microcomputer is connected to respectively A/D change-over circuit and keyboard interface circuit, the output terminal of microcomputer is connected to respectively liquid crystal display and D/A change-over circuit, described A/D change-over circuit connects signal conditioning circuit, and described signal conditioning circuit is also connected with the signal output part of pressure transducer.
2. a kind of vehicle dynamic weighing according to claim 1 and vehicle speed detector device, is characterized in that: described microcomputer adopts industrial control computer, and described pressure transducer adopts bended plate type strain transducer.
3. a kind of vehicle dynamic weighing according to claim 1 and vehicle speed detector device, is characterized in that: described signal conditioning circuit is comprised of high-precision amplifying AD620 and high-precision low-drift operational amplifier OP07.
4. a kind of vehicle dynamic weighing according to claim 1 and vehicle speed detector device, is characterized in that: described A/D change-over circuit adopts AD plate PCL-818H, and described D/A change-over circuit adopts DA plate DAC-727.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320551217.2U CN203464988U (en) | 2013-09-06 | 2013-09-06 | Dynamic vehicle weighing and speed detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320551217.2U CN203464988U (en) | 2013-09-06 | 2013-09-06 | Dynamic vehicle weighing and speed detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203464988U true CN203464988U (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320551217.2U Expired - Fee Related CN203464988U (en) | 2013-09-06 | 2013-09-06 | Dynamic vehicle weighing and speed detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203464988U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063159A (en) * | 2017-01-16 | 2017-08-18 | 湖南大学 | Utilize the method and system of support reaction Dynamic Recognition vehicle axle weight, wheelbase and speed |
| CN107687885A (en) * | 2017-08-08 | 2018-02-13 | 合肥盈川信息技术有限公司 | Intelligent vehicle spindle-type and tire number of axle testing and analysis system |
| CN109297575A (en) * | 2018-09-27 | 2019-02-01 | 招商局重庆交通科研设计院有限公司 | A kind of vehicle dynamic weighing system of piezoelectric type |
| CN110794163A (en) * | 2019-11-13 | 2020-02-14 | 佛山科学技术学院 | Acquisition system for measuring and calculating vehicle running speed |
-
2013
- 2013-09-06 CN CN201320551217.2U patent/CN203464988U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063159A (en) * | 2017-01-16 | 2017-08-18 | 湖南大学 | Utilize the method and system of support reaction Dynamic Recognition vehicle axle weight, wheelbase and speed |
| CN107063159B (en) * | 2017-01-16 | 2019-09-03 | 湖南大学 | Utilize the method and system of support reaction Dynamic Recognition vehicle axle weight, wheelbase and speed |
| CN107687885A (en) * | 2017-08-08 | 2018-02-13 | 合肥盈川信息技术有限公司 | Intelligent vehicle spindle-type and tire number of axle testing and analysis system |
| CN109297575A (en) * | 2018-09-27 | 2019-02-01 | 招商局重庆交通科研设计院有限公司 | A kind of vehicle dynamic weighing system of piezoelectric type |
| CN110794163A (en) * | 2019-11-13 | 2020-02-14 | 佛山科学技术学院 | Acquisition system for measuring and calculating vehicle running speed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20140906 |
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| EXPY | Termination of patent right or utility model |