CN101706997A - Distributed optical fiber vehicle comprehensive information detection system and processing method thereof - Google Patents
Distributed optical fiber vehicle comprehensive information detection system and processing method thereof Download PDFInfo
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Abstract
本发明公开了一种分布式光纤车辆综合信息检测系统及其处理方法，属于光纤传感领域和交通车辆信息检测领域。本发明包括：光源、耦合分路器、光纤法珀干涉仪、传感光纤、检测输出装置、信号处理装置并依次相连。本发明利用光的干涉原理，使用光纤作为传感与信号传输介质，车辆轮胎压过光纤时，光纤受力产生的应变会改变光纤中传输光的相位，产生脉冲信号，通过对各种脉冲信号的分析计算，从而得出需检测的交通车辆的车速、车重、车型等信息，并可对车流量进行统计。该系统结构简单，具有传输距离远，生产成本低，响应速度快，灵敏度高，较易维护等特点。可作为交通车辆信息检测与统计系统使用，也可作为道路综合信息采集系统的一部分使用。
The invention discloses a distributed optical fiber vehicle comprehensive information detection system and a processing method thereof, which belong to the field of optical fiber sensing and the field of traffic vehicle information detection. The invention includes: a light source, a coupling splitter, an optical fiber Fab interferometer, a sensing optical fiber, a detection output device, and a signal processing device, which are connected in sequence. The invention utilizes the interference principle of light and uses optical fiber as the medium for sensing and signal transmission. When a vehicle tire is pressed over the optical fiber, the strain generated by the force on the optical fiber will change the phase of the transmitted light in the optical fiber and generate pulse signals. The analysis and calculation of the traffic vehicles to obtain the speed, weight, model and other information of the traffic vehicles to be detected, and the traffic flow can be counted. The system has the advantages of simple structure, long transmission distance, low production cost, fast response, high sensitivity and easy maintenance. It can be used as a traffic vehicle information detection and statistics system, and can also be used as a part of the road comprehensive information collection system.
Description
Technical field
The invention belongs to sensory field of optic fibre and vehicular traffic information detection range, particularly relate to a kind of vehicle comprehensive information detection system that obtains information such as vehicle speed, car weight, vehicle, vehicle flowrate.
Background technology
Communications and transportation is the important foundation facility and the basic industry of national economy and social development, is the lifeblood of national economy operation.Transport informationization is the effective measures that promote communications and transportation efficient and security, is considered to solve that road traffic blocks up, traffic hazard quantity increases, alleviates the effective way of problems such as environmental pollution.The most basic in the transport informationization, most important information-based means are to utilize the real-time collection of various device realization to traffic route information.
In the highway information system management, hope can realize each road section traffic volume information of vehicles of highway is monitored in real time.In real time, reliably basic vehicular traffic information is to judge the fundamental basis of traffic, it is the prerequisite that realizes the express highway intelligent management, for universal traffic-information service, ensure express way driving safety, realize economic, efficient, safety and transportation service easily, thereby improve freeway management and service level is significant.Generally need measured vehicle information to comprise the speed of a motor vehicle, car weight, vehicle, vehicle flowrate etc.
Existing wagon detector kind mainly comprises the magnetic induction detecting device, and ripple is wagon detector frequently, video detector, piezoelectric film sensor etc.The magnetic induction detecting device need box cut on highway in these detection modes; Can there be the multilane erroneous judgement in ripple wagon detector frequently; Video detector exists cost to cross high shortcoming.
Piezoelectric film sensor utilizes piezoelectric that kinetic energy is changed into electric energy, Information Monitoring when vehicle tyre process sensor.Tire is through sensor, produces one be applied to sensor on the simulating signal that is directly proportional of pressure, and the cycle of exporting is identical with the time that tire rests on the sensor.The strong point of piezoelectric film sensor is to obtain signals such as the speed of vehicle, weight, and can carry out information classification easily.Its shortcoming is the distance weak point that piezoelectric signal can directly transmit, so the signal processing apparatus range sensor can not be too far away, and the piezoelectric film sensor price is expensive.
Summary of the invention
In order to solve prior art problems, the invention provides a kind of with optical fiber as signal transmission medium, have long transmission distance, production cost is low, response speed is fast, and is highly sensitive, than the distributed optical fiber vehicle comprehensive information detection system and the disposal route thereof of characteristics such as easy care.
The technical solution adopted in the present invention is:
Principle of work of the present invention is based on interference of light principle. and light source output laser enters sensor fibre by coupling mechanism, in optical fibre Fabry-perot (be called for short method amber) interferometer, produce and interfere. establish do not have vehicle by the time system works be normality, light transmission in the system keeps interfering balance, when promptly not having vehicle to press optical fiber, the output terminal that detects output unit is a stable output. pass through the optical fibre installation zone as vehicle, when the vehicle wheel tire pressure is crossed optical fiber, optical fiber can produce strain, thereby change the phase place of transmission light, make interference of light output that violent the change be taken place; After vehicle passes through optical fiber fully, system returns to normal automatically and keeps stable output. so the automotive wheels tire pressure is crossed the output terminal that detects output unit behind the sensor fibre and can be exported a pulse signal. and the sensor fibre more than the twice of arranging in tested zone, after the spacing of twice sensor fibre is known, vehicle front tyre or back tire pressure are crossed two and can be produced two pulse signals to sensor fibre, by measuring the time interval of two pulse signals, can calculate the speed of a motor vehicle. can export two pulses when tire is by one sensor fibre before and after the same automobile, by the calculating of signal processing apparatus to the signal of the speed of a motor vehicle and two pulses, can draw the distance of front and back wheel, thereby judge the vehicle of vehicle. the amplitude of the pulse that output terminal is exported of detection output unit is relevant with the power size that vehicle acts on the sensor fibre, can calculate car weight by signal processing apparatus like this. count by signal processing apparatus paired pulses quantity, also can add up vehicle flowrate.
A kind of distributed optical fiber vehicle comprehensive information detection system is characterized in that, comprising: light source, coupling shunt, Fabry-perot optical fiber interferometer, sensor fibre, detection output unit, signal processing apparatus; Described light source, coupling shunt, Fabry-perot optical fiber interferometer, sensor fibre, detection output unit, signal processing apparatus link to each other successively.
Aforesaid a kind of distributed optical fiber vehicle comprehensive information detection system is characterized in that described system also comprises solar panel, and it is the total system power supply that described solar panel is accepted sun power.
Aforesaid a kind of distributed optical fiber vehicle comprehensive information detection system is characterized in that, described sensor fibre can be turned back by " S " type multichannel on road and be arranged, and the optical fiber more than the twice of guaranteeing to arrange at least in tested zone.
A kind of disposal route based on distributed optical fiber vehicle comprehensive information detection system is characterized in that, may further comprise the steps: 1, solar panel is all unit power supplies of total system by receiving sun power; 2, light source output laser enters the sensor fibre that is laid on the road by coupling mechanism; 3, the laser by sensor fibre produces interference in the Fabry-perot optical fiber interferometer; 4, when not having vehicle to pass through optical fiber, the interference of light keeps balance, and detecting output unit does not have useful signal output; 5, when the vehicle wheel tire pressure was crossed sensor fibre, optical fiber can produce strain, and fibre strain causes the interference light signal generation phase change that transmits in the optical fiber; 6, interference of light balance is destroyed, and the output terminal that detects output unit can produce pulse signal output; 7, signal processing apparatus is analyzed various pulse signals, evaluation.
Aforesaid a kind of disposal route based on distributed optical fiber vehicle comprehensive information detection system, it is characterized in that, step 6 is that different vehicle front tyre or back tire pressure are crossed with sensor fibre, detect the output terminal output pulse signal of output unit, step 7 is counted by pulse signals quantity for signal processing apparatus, can add up vehicle flowrate.
Aforesaid a kind of disposal route based on distributed optical fiber vehicle comprehensive information detection system, it is characterized in that, step 6 is crossed sensor fibre for the vehicle wheel tire pressure, detect the output terminal output pulse signal of output unit, step 7 be signal processing apparatus according to pulse signal amplitude, calculate car weight.
Aforesaid a kind of disposal route based on distributed optical fiber vehicle comprehensive information detection system, it is characterized in that, step 6 is the sensor fibre of the twice known separation of arranging in tested zone, the front tyre of vehicle or back tire pressure are crossed the twice sensor fibre, detect two pulse signals of output terminal output of output unit, step 7 draws the time interval for signal processing apparatus to two pulse signal analyses, thus the speed of a motor vehicle of calculating.
Aforesaid a kind of disposal route based on distributed optical fiber vehicle comprehensive information detection system, it is characterized in that, step 6 is crossed with sensor fibre for the front and back wheel tire pressure of vehicle, detect two pulse signals of output terminal output of output unit, step 7 draws the time interval for signal processing apparatus to two pulse signal analyses, calculates wheel distance by vehicle again according to the speed of a motor vehicle.
The invention has the beneficial effects as follows:
1, the present invention uses optical fiber sensing method, utilizes optical information to survey, and compares the piezoelectric membrane method, and response speed is fast, and is highly sensitive.
2, the present invention can dynamically be to measure under the vehicle running state, realizes the information of vehicles detection of dynamic.
3, the present invention is owing to adopt Optical Fiber Transmission to have very low signal transmission attenuation, and Optical Fiber Transmission can be transmitted signal far.
4, the present invention uses optical fiber sensing method, is easy to merge with Networks of Fiber Communications, forms optical fiber sensing network, can realize that large-scale information detects and statistics.
5, the present invention uses solar poweredly, having convenient, the energy-saving advantages of power supply, need not set up electric power system specially, can be fit to remote districts and use.
6, sensor fibre thickness of the present invention is little, is laid on the road, does not influence normal vehicle operation.
7, the present invention realizes that cost is low, is convenient to the market application.
8, easy construction of the present invention not be used on the road and slots, and is easy to safeguard.
Description of drawings
Fig. 1 is a structural representation block diagram of the present invention;
Fig. 2 is a work structuring synoptic diagram of the present invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, a kind of distributed optical fiber vehicle comprehensive information detection system comprises: light source, coupling shunt, Fabry-perot optical fiber interferometer, sensor fibre, detection output unit, signal processing apparatus, solar panel; Described light source, coupling shunt, Fabry-perot optical fiber interferometer, sensor fibre, detection output unit, signal processing apparatus link to each other successively, and it is the total system power supply that described solar panel is accepted sun power.Sensor fibre can be turned back by " S " type multichannel on road and be arranged, and optical fiber more than the twice guarantees to arrange in tested zone.The three road optical fiber of for example can arranging in tested zone, the optical fiber output pulse signal that will contact at first with doughnut is as start signal, and the calculated signals of utilizing back twice optical fiber to be exported obtains vehicle information such as the speed of a motor vehicle, car weight, vehicle, vehicle flowrate.For the information of vehicles monitoring in a plurality of tracks,, can adorn a sensor fibre in each track in the application in order to increase sensitivity.Aspect construction of the highway, the method that adopts the surface to paste directly is fixed on packaged sensor fibre on the road surface, is fixed on the road surface with wear-resistant paint to get final product.The present invention can detect in real time.For example can be at highway every monitoring point of 5～10 kilometers installations, because the continuity that detects can guarantee that system-wide section car two information detect in real time, for road administration, traffic administration, current rate and security provide decision-making foundation accurately.
As shown in Figure 2, can calculate the various information that obtain vehicle, the preparation method of vehicle flowrate, car weight, the speed of a motor vehicle, four kinds of information of vehicles of vehicle under the introduction of following mask body by detection system of the present invention.
1) preparation method of vehicle flowrate:
1, solar panel is all unit power supplies of total system by receiving sun power;
2, light source output laser enters the sensor fibre that is laid on the road by coupling mechanism;
3, the laser by sensor fibre produces interference in the Fabry-perot optical fiber interferometer;
4, when not having vehicle to pass through optical fiber, the interference of light keeps balance, and detecting output unit does not have useful signal output; 5, when the vehicle wheel tire pressure was crossed sensor fibre, optical fiber can produce strain, and fibre strain causes the interference light signal generation phase change that transmits in the optical fiber;
6, different vehicle front tyre or back tire pressure are crossed with sensor fibre, detect the output terminal output pulse signal of output unit;
7, signal processing apparatus is counted by pulse signals quantity, can add up vehicle flowrate.
2) preparation method of car weight:
1, solar panel is all unit power supplies of total system by receiving sun power;
2, light source output laser enters the sensor fibre that is laid on the road by coupling mechanism;
3, the laser by sensor fibre produces interference in the Fabry-perot optical fiber interferometer;
4, when not having vehicle to pass through optical fiber, the interference of light keeps balance, and detecting output unit does not have useful signal output; 5, when the vehicle wheel tire pressure was crossed sensor fibre, optical fiber can produce strain, and fibre strain causes the interference light signal generation phase change that transmits in the optical fiber;
6, the vehicle wheel tire pressure is crossed sensor fibre, detects the output terminal output pulse signal of output unit;
7, signal processing apparatus calculates car weight according to pulse signal amplitude
3) preparation method of the speed of a motor vehicle:
1, solar panel is all unit power supplies of total system by receiving sun power;
2, light source output laser enters the sensor fibre that is laid on the road by coupling mechanism;
3, the laser by sensor fibre produces interference in the Fabry-perot optical fiber interferometer;
4, when not having vehicle to pass through optical fiber, the interference of light keeps balance, and detecting output unit does not have useful signal output; 5, when the vehicle wheel tire pressure was crossed sensor fibre, optical fiber can produce strain, and fibre strain causes the interference light signal generation phase change that transmits in the optical fiber;
6, arrange in the tested zone sensor fibre of twice known separation, the front tyre of vehicle or back tire pressure are crossed the twice sensor fibre, detect two pulse signals of output terminal output of output unit;
7, for signal processing apparatus two pulse signal analyses are drawn the time interval, thus the speed of a motor vehicle of calculating.
4) preparation method of vehicle:
1, solar panel is all unit power supplies of total system by receiving sun power;
2, light source output laser enters the sensor fibre that is laid on the road by coupling mechanism;
3, the laser by sensor fibre produces interference in the Fabry-perot optical fiber interferometer;
4, when not having vehicle to pass through optical fiber, the interference of light keeps balance, and detecting output unit does not have useful signal output; 5, when the vehicle wheel tire pressure was crossed sensor fibre, optical fiber can produce strain, and fibre strain causes the interference light signal generation phase change that transmits in the optical fiber;
6, the front and back wheel tire pressure of vehicle is crossed with sensor fibre, detects two pulse signals of output terminal output of output unit;
7, signal processing apparatus draws the time interval to two pulse signal analyses, calculates wheel distance by vehicle again according to the speed of a motor vehicle, thus the vehicle of judging.
The present invention is defined in aforesaid embodiment, and in the category that does not exceed basic fundamental thought of the present invention, the operator of relevant industries can carry out various deformation to it, and the above-mentioned distortion of carrying out should belong to claim scope of the present invention.
Claims (8)
1. a distributed optical fiber vehicle comprehensive information detection system is characterized in that, comprising: light source, coupling shunt, Fabry-perot optical fiber interferometer, sensor fibre, detection output unit, signal processing apparatus; Described light source, coupling shunt, Fabry-perot optical fiber interferometer, sensor fibre, detection output unit, signal processing apparatus link to each other successively, on described sensor fibre setting and the road.
2. a kind of distributed optical fiber vehicle comprehensive information detection system according to claim 1 is characterized in that described system also comprises solar panel, and it is the total system power supply that described solar panel is accepted sun power.
3. a kind of distributed optical fiber vehicle comprehensive information detection system according to claim 1 is characterized in that, described sensor fibre can be turned back by " S " type multichannel on road and be arranged, and the optical fiber more than the twice of guaranteeing to arrange at least in tested zone.
4. the disposal route based on distributed optical fiber vehicle comprehensive information detection system is characterized in that, may further comprise the steps: 1, solar panel is all unit power supplies of total system by receiving sun power; 2, light source output laser enters the sensor fibre that is laid on the road by coupling mechanism; 3, the laser by sensor fibre produces interference in the Fabry-perot optical fiber interferometer; 4, when not having vehicle to pass through optical fiber, the interference of light keeps balance, and detecting output unit does not have useful signal output; 5, when the vehicle wheel tire pressure was crossed sensor fibre, optical fiber can produce strain, and fibre strain causes the interference light signal generation phase change that transmits in the optical fiber; 6, interference of light balance is destroyed, and the output terminal that detects output unit can produce pulse signal output; 7, signal processing apparatus is analyzed various pulse signals, evaluation.
5. a kind of disposal route according to claim 3 based on distributed optical fiber vehicle comprehensive information detection system, it is characterized in that, step 6 is that different vehicle front tyre or back tire pressure are crossed with sensor fibre, detect the output terminal output pulse signal of output unit, step 7 is counted by pulse signals quantity for signal processing apparatus, can add up vehicle flowrate.
6. a kind of disposal route according to claim 3 based on distributed optical fiber vehicle comprehensive information detection system, it is characterized in that, step 6 is crossed sensor fibre for the vehicle wheel tire pressure, detect the output terminal output pulse signal of output unit, step 7 be signal processing apparatus according to pulse signal amplitude, calculate car weight.
7. a kind of disposal route according to claim 3 based on distributed optical fiber vehicle comprehensive information detection system, it is characterized in that, step 6 is the sensor fibre of the twice known separation of arranging in tested zone, the front tyre of vehicle or back tire pressure are crossed the twice sensor fibre, detect two pulse signals of output terminal output of output unit, step 7 draws the time interval for signal processing apparatus to two pulse signal analyses, thus the speed of a motor vehicle of calculating.
8. a kind of disposal route according to claim 3 based on distributed optical fiber vehicle comprehensive information detection system, it is characterized in that, step 6 is crossed with sensor fibre for the front and back wheel tire pressure of vehicle, detect two pulse signals of output terminal output of output unit, step 7 draws the time interval for signal processing apparatus to two pulse signal analyses, calculates wheel distance by vehicle again according to the speed of a motor vehicle.
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| CN102063795A (en) * | 2010-12-27 | 2011-05-18 | 交通运输部公路科学研究所 | System, method and device for acquiring information of intensive traffic flow |
| CN102155974A (en) * | 2011-04-08 | 2011-08-17 | 东南大学 | Dynamic weighing sensor for vehicles |
| CN102231235A (en) * | 2011-04-29 | 2011-11-02 | 陈伟 | Method for detecting and positioning traffic flow abnormal point |
| CN103994809A (en) * | 2014-03-13 | 2014-08-20 | 王强 | Weigh-in-motion method of high-speed and dynamic automobile based on optical fiber grating |
| GB2513399A (en) * | 2013-04-26 | 2014-10-29 | Optasense Holdings Ltd | Traffic monitoring |
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| CN102063795B (en) * | 2010-12-27 | 2015-01-21 | 交通运输部公路科学研究所 | System, method and device for acquiring information of intensive traffic flow |
| CN102063795A (en) * | 2010-12-27 | 2011-05-18 | 交通运输部公路科学研究所 | System, method and device for acquiring information of intensive traffic flow |
| CN102155974A (en) * | 2011-04-08 | 2011-08-17 | 东南大学 | Dynamic weighing sensor for vehicles |
| CN102231235A (en) * | 2011-04-29 | 2011-11-02 | 陈伟 | Method for detecting and positioning traffic flow abnormal point |
| CN102231235B (en) * | 2011-04-29 | 2016-02-24 | 陈伟 | A kind of traffic flow outlier detection localization method |
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| CN103994809A (en) * | 2014-03-13 | 2014-08-20 | 王强 | Weigh-in-motion method of high-speed and dynamic automobile based on optical fiber grating |
| CN104330586B (en) * | 2014-11-10 | 2017-04-12 | 张苗 | Solar-powered laser speed measuring device |
| CN104677421A (en) * | 2015-02-10 | 2015-06-03 | 中国科学技术大学先进技术研究院 | Optical fiber temperature and strain sensing device and method based on high spectral resolution technology |
| CN104677421B (en) * | 2015-02-10 | 2017-03-08 | 中国科学技术大学先进技术研究院 | Fiber optic temperature based on high spectral resolution technology and stress sensing device and method |
| WO2016135289A1 (en) * | 2015-02-27 | 2016-09-01 | Nils Schopohl | Sensor device for tires |
| CN104700624A (en) * | 2015-03-16 | 2015-06-10 | 电子科技大学 | Traffic flow online monitoring system and method based on phase-sensitive optical time domain reflectometer |
| CN108431880A (en) * | 2015-10-30 | 2018-08-21 | 光学感应器控股有限公司 | Monitor the magnitude of traffic flow |
| CN106043168A (en) * | 2016-06-30 | 2016-10-26 | 大连楼兰科技股份有限公司 | System and method for real-time monitoring of car body health status |
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