CN102436749A - Wireless vehicle detector and vehicle speed detection method thereof - Google Patents
Wireless vehicle detector and vehicle speed detection method thereof Download PDFInfo
- Publication number
- CN102436749A CN102436749A CN2011102911848A CN201110291184A CN102436749A CN 102436749 A CN102436749 A CN 102436749A CN 2011102911848 A CN2011102911848 A CN 2011102911848A CN 201110291184 A CN201110291184 A CN 201110291184A CN 102436749 A CN102436749 A CN 102436749A
- Authority
- CN
- China
- Prior art keywords
- vehicle
- vehicle detector
- wireless
- wireless vehicle
- detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a wireless vehicle detector. The wireless vehicle detector comprises a controller, a power source, a geomagnetism sensor and at least one RF (radio frequency) communication module, wherein the geomagnetism sensor comprises three sensing units, at least two sensing units are arranged on a Z axle at interval with a certain distance. When a vehicle passes through the wireless vehicle detector, the geomagnetic field on the Z axle generates disturbance so as to sense the existence of the vehicle; and the two sensing units detect passing-by time difference of the vehicle, the time difference is divided by the the time difference to obtain the passing-by speed of the vehicle, therefore, the wireless vehicle detector can measure the vehicle speed by using only one built-in geomagnetism sensor, and the device cost is greatly reduced. The invention further provides a vehicle speed detection method of the wireless vehicle detector.
Description
Technical field
The present invention relates to the vehicle detection field, particularly a kind of wireless car detecting device and speed-measuring method thereof.
Background technology
Vehicle detector is applied in the multiple intelligent traffic systems such as Intelligent Signal Control System, traffic current amount detection systems, electronic police system, the management of gateway, city, urban transportation inducible system usually, in order to the existence that detects vehicle and travel speed etc.
Feel the coil vehicle detector traditionally because be through on pavement of road, excavating wire casing, inside coiling detects vehicle, and data are excavated wire casing is connected to the roadside through wired mode switch board again; Magnetic test coil fluting area has 1.2*0.8 rice usually; And therefore reached at the hundreds of rice of order wire flute length have complicated, the artificial costliness of construction, time-consuming, and a track is installed on average needs 2 hour time; Also need large-scale cutting equipment, its power supply, operation all very bother.And ground induction coil rolls with surface deformation and oversize vehicle easily and is destroyed, and the product life cycle is short, must excavate wire casing again maintenance the time again, and the maintenance maintenance cost is high.For some traffic applications system; Such as the municipal intelligent traffic inducible system, need on road, hundred meters a vehicle detector, the vehicle detecting system of huge quantity like this just be installed in every interval; If adopt the mode of ground induction coil, entire road will suffer serious destruction.In addition; Because what ground induction coil adopted is enameled wire, therefore in the area of rainy water, the situation of coil short appears through regular meeting also; The destruction that above-mentioned in addition because extreme difference road conditions cause coil is often caused the traffic signals paralysis of certain crossing, certain section highway section even subregion.
Along with science and technology development, the wireless geomagnetism vehicle detector has appearred, and the wireless geomagnetism vehicle detector is through the disturbance of signal magnetic field over the ground of detection vehicle, comes the existence of measuring vehicle, and testing result is sent through wireless mode.Owing to adopt wireless mode to send testing result, therefore not be used in the communication wire casing of the long distance of road surface excavation, reduce construction cost, save time, also improved system reliability simultaneously.In addition, have benefited from the earth magnetism detection technique, the wireless geomagnetism vehicle detector does not receive weather effect, can be round-the-clock, high-accuracy detects and comprise multiple vehicle vehicles such as electric motor car, car, minibus, truck, container truck.The wireless geomagnetism vehicle detector can be fit to various traffics such as highway, urban road, overpass, bridge, national highway, junction, town and country to be used, and road surface fluctuating, distortion, fracture, oversize vehicle roll etc. and all can not cause damage to product.Therefore the wireless vehicle detector has development trend from strength to strength.
Yet the wireless vehicle detector also also has some development bottlenecks, for example; Aspect measurement of vehicle speed, prior art adopts two vehicle detectors to measure usually, utilizes two distances between the vehicle detector to calculate the speed of vehicle through the used time of this distance divided by vehicle; There is the problem of two aspects in this method, at first, sometimes needs especially detecting devices of installing for degree of testing the speed more; Cost is high, secondly, owing to there is the time error of data transmission; Be difficult to accurately calculate vehicle through the time between two vehicle detectors, so the measurement result out of true; In addition; Vehicle detector be needs firm withstand voltage, need water-tight, the outside instrument that can carry out human-machine operation of needs also again, the factor that on design details, needs to consider is a lot, the for example design of switch; Want to carry out switching manipulation easily from the housing outside; Just need switch be stretched, but perforate stretches and can cause leaking, accomplish that waterproof will do exquisite relatively mechanism and realize the peripheral operation switch; And exquisite mechanism often is unable to undergo vehicle and presses, and therefore many design detailss also are to should be noted that in the technical development of wireless vehicle detector and capture.
Summary of the invention
In the high problem of cost that runs into aspect the measurement speed of a motor vehicle, the present invention provides a kind of wireless vehicle detector to wireless vehicle detector in the prior art, only needs a wireless vehicle detector, can accomplish the detection of car speed, reduces greatly and measures cost.
The present invention also provides the method for detecting vehicle speed of this wireless vehicle detector.
This wireless vehicle detector comprises a controller, a power supply, a geomagnetic sensor and at least one RF communication module; It is characterized in that; This geomagnetic sensor comprises three sensing cells, and wherein at least two sensing cells are arranged on the Z axle with mode spaced from each other.
The method of the wireless vehicle detector measurement speed of a motor vehicle; It comprises step: step 1; One wireless vehicle detector precalculated position in road is set; Wherein this wireless vehicle detector comprises a geomagnetic sensor, and this geomagnetic sensor comprises three sensing cells, and wherein two sensing cells are arranged on the Z axle with the mode of x spaced from each other; Step 2 when vehicle to be measured during through this wireless vehicle detector, is arranged in these two sensing cells on the Z axle and detects respectively that to obtain the vehicle elapsed time be T1 and T2; And step 3, the speed when calculating vehicle through this wireless vehicle detector according to v=x/ (T2-T1).
Compared with prior art, wireless vehicle detector provided by the invention adopts and does not concentrate on the earth inductor in the chip, utilizes two sensing cells in its three-dimensional sensing cell all to be arranged on the Z axle; Rather than three sensing cell quadratures settings of usual manner, and these two sensing cells are spaced apart, during vehicle process wireless vehicle detector; Magnetic field of the earth on the Z axle produces disturbance; With existing of this senses vehicle, and it is poor to detect the vehicle elapsed time through two sensing cells; Divided by the mistiming, draw the speed of vehicle process with distance.Owing to only need a built-in geomagnetic sensor can accomplish the measurement of a wireless vehicle detector completion car speed, therefore reduce equipment cost greatly.In addition; Because the method for computing velocity is very simple, the distance between two sensing cells is certain, and vehicle reads and calculates through the time also same wireless vehicle detector processor inside of two sensing cells; Therefore error is little, and measurement result is accurate.Therefore the wireless vehicle panel detector structure that the present invention relates to is simply ingenious, and cost is low, and its method of measuring the speed of a motor vehicle is simple, and error is little, is worthy to be popularized.
Description of drawings
Fig. 1 is a wireless vehicle panel detector structure module map provided by the present invention;
Fig. 2 is the structural representation of geomagnetic sensor 30 among Fig. 1;
Fig. 3 is the principle schematic of the wireless vehicle detector measurement speed of a motor vehicle; And
Fig. 4 is the another kind of structural representation of geomagnetic sensor 30.
Specific embodiment
Below in conjunction with accompanying drawing wireless vehicle detector provided by the present invention is described further, only technical scheme of the present invention and design concept is set forth in detail below it is pointed out that with a kind of optimized technical scheme.
The wireless vehicle detector that present embodiment provides is a kind of geomagnetic type vehicle detector, through detecting the vehicle disturbance of signal magnetic field over the ground, comes the existence of measuring vehicle.Consult Fig. 1; The construction module figure of this wireless vehicle detector, this wireless vehicle detector 100 comprise controller 10, ON-OFF control circuit 20, geomagnetic sensor 30, acceleration transducer 40, power supply 50, a RF communication module 61, the 2nd RF communication module 62 and USB/ indicating lamp module 70.Wherein, ON/OFF circuit 20 is used for optional manual machine open/close method.Two sensing units 31 of geomagnetic sensor 30 and opened layout in 32 minutes, as shown in Figure 2, be used for the perception automobile storage and measure speed information.Acceleration transducer 40 be used for switch control and to automobile storage subsidiary.The RF communication module is the data communication that is used between vehicle detector and the base station, is used to transmit the object information of detection on the one hand, is used for the radio upgrade of equipment firmware on the one hand, and promptly equipment can upgrade its inner program through wireless mode.In the present embodiment, the RF communication module has two kinds of optional schemes, and just a RF communication module 61 and the 2nd RF communication module 62 are respectively two kinds of frequencies of 433MHz and 2.4GHz, uses to be fit to different areas.Power supply 50 is used for the entire equipment power supply, and sustainable work is more than 5 years.USB/ indicating lamp module 70 is used for wired mode to be downloaded/the upgrading products firmware, uses when being mainly used in production and trouble hunting.
Different with prior art is that this geomagnetic sensor 30 is not to be integrated on the chip in this wireless vehicle detector 100; But electrically connect with independent external form and control chip, so just can be with sensing unit independent layout on circuit of the X of this geomagnetic sensor 30, Y, three axles of Z, as shown in Figure 2; Also be designed to the Z axle to X or Y axle and use, that is to say that the sensing unit of the X of this geomagnetic sensor 30, Y, three axles of Z has at least two sensing cells to be arranged on the Z axle with mode spaced from each other; The result of this off-gauge method of application has had two Z axles, and the Z axle is the sensitive axes of geomagnetic sensor 30, that is to say; Magnetic field of the earth during this geomagnetic sensor of automobile process on the Z axle produces disturbance; Therefore, through these two branches Z axle sensing unit at a certain distance, can detect the automobile elapsed time respectively; Can calculate the speed of automobile process with distance divided by the mode of time, thereby realize speed measuring function.
The method that adopts this wireless vehicle detector 100 to measure the speed of a motor vehicle specifically is such: step 1; In road, there is the position that needs that this wireless vehicle detector 100 is set; Certainly this wireless vehicle detector 100 comprises geomagnetic sensor 30; This geomagnetic sensor 30 comprises three sensing cells, and wherein two sensing cells are arranged on the Z axle with the mode of x spaced from each other; Step 2 when vehicle to be measured during through this wireless vehicle detector, is arranged in these two sensing cells on the Z axle and detects respectively that to obtain the vehicle elapsed time be T1 and T2; And step 3, the speed when calculating vehicle through this wireless vehicle detector according to v=x/ (T2-T1).The ultimate principle of this method can combine Fig. 3 to understand; Geomagnetic sensors 30 are arranged in to separate between two sensing units 31 and 32 on the Z axle in the wireless vehicle detector 100 has apart from x; When automobile through out-of-date, these two sensing units 31 and 32 can both detect the existence of this automobile, and; Because x spaced apart between the two; Therefore these two sensing units detect automobile the time be carved with regular hour difference T2-T1, utilize and should can calculate the speed v of automobile apart from x divided by this mistiming T2-T1.Because it is inner at same wireless vehicle detector; Therefore two detected information of sensing unit send to the inner same processor processes of wireless vehicle detector; When differ from computing time, need not do calibration any time; Also because data transmission is to carry out at device interior, avoided the time error of wireless transmission simultaneously, so this method measurement speed of a motor vehicle is very accurate.Certainly the more important thing is; Through wireless vehicle detector inner member is done structural ingenious improvement, realized that a wireless vehicle detector just can measure the purpose of the speed of a motor vehicle, greatly reduce the cost of vehicle speed measurement; And the result is more accurate, and this is that the prior art personnel are quite unexpected.
In addition, this wireless vehicle detector 100 can also have the improvement of other modes, for example; Two geomagnetic sensors can also be set in the wireless vehicle detector, replacing two sensing units of a geomagnetic sensor, though like this on the cost than above-mentioned preferred embodiment height a bit; But with respect to prior art; Still can realize the purpose of a wireless vehicle detector measurement speed of a motor vehicle, and, the trouble of time check and correction and the time error that can avoid wireless transmission do not had equally.
In addition, three detecting units of geomagnetic sensor 30 all can be arranged on the Z axle in this wireless vehicle detector 100, and are as shown in Figure 4; Just the sensing cell of the X of geomagnetic sensor 30, Y, three axles of Z all being treated as the Z axle uses; Separately layout is inner at vehicle detector, and the single unit vehicle detector device just can obtain at least three group speed datas like this, adds suitable algorithm process based on these data; Just can obtain accurate more data, to improve the degree of accuracy of measuring.Such as simple algorithm mode, with 2 groups of modes that speed data is taked to average that 3 sensing cells obtain, resulting numerical value accuracy will be more accurate than the one group of velocity amplitude that data calculated that has only two sensing cells to obtain.
This wireless vehicle detector 100 can also be applied in the intelligent transportation systems such as Intelligent Signal Control System, traffic flow detection system, electronic police or traffic guidance except being applied to vehicle speed measuring.
Only be preferred implementation of the present invention below, should be pointed out that above-mentioned preferred implementation should not be regarded as limitation of the present invention.For those skilled in the art, do not breaking away from the spirit and scope of the present invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (5)
1. wireless vehicle detector; Comprise a controller, a power supply, a geomagnetic sensor and at least one RF communication module; It is characterized in that this geomagnetic sensor comprises three sensing cells, wherein at least two sensing cells are arranged on the Z axle with mode spaced from each other.
2. wireless vehicle detector as claimed in claim 1 is characterized in that, this RF communication module is two, and it has different frequency respectively.
3. wireless vehicle detector as claimed in claim 2 is characterized in that, the frequency of one of these two RF communication modules is 433MHz.
4. like claim 2 or 3 described wireless vehicle detectors, it is characterized in that the frequency of one of these two RF communication modules is 2.4GHz.
5. the method for a wireless vehicle detector measurement speed of a motor vehicle, it comprises step:
Step 1; One wireless vehicle detector precalculated position in road is set; Wherein this wireless vehicle detector comprises a geomagnetic sensor, and this geomagnetic sensor comprises three sensing cells, and wherein two sensing cells are arranged on the Z axle with the mode of x spaced from each other;
Step 2 when vehicle to be measured during through this wireless vehicle detector, is arranged in these two sensing cells on the Z axle and detects respectively that to obtain the vehicle elapsed time be T1 and T2; And
Step 3, the speed when calculating vehicle through this wireless vehicle detector according to v=x/ (T2-T1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102911848A CN102436749A (en) | 2011-09-28 | 2011-09-28 | Wireless vehicle detector and vehicle speed detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102911848A CN102436749A (en) | 2011-09-28 | 2011-09-28 | Wireless vehicle detector and vehicle speed detection method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102436749A true CN102436749A (en) | 2012-05-02 |
Family
ID=45984782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102911848A Pending CN102436749A (en) | 2011-09-28 | 2011-09-28 | Wireless vehicle detector and vehicle speed detection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102436749A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103680152A (en) * | 2013-12-13 | 2014-03-26 | 青岛海信网络科技股份有限公司 | Vehicle detecting method and system |
| CN104112359A (en) * | 2013-04-22 | 2014-10-22 | 徐州工程学院 | Vehicle type and speed detection device based on bias magnetic field and working method |
| CN104835326A (en) * | 2015-04-24 | 2015-08-12 | 周欣 | Vehicle detector based on anisotropy magnetic resistance sensor array |
| CN105761497A (en) * | 2013-04-22 | 2016-07-13 | 徐州工程学院 | Vehicle solid line pressing detection method and solid line pressing snapshooting device |
| CN106355898A (en) * | 2016-11-04 | 2017-01-25 | 南京理工大学 | Method and device for speed measurement based on geomagnetic sensing |
| CN110310491A (en) * | 2019-06-24 | 2019-10-08 | 武汉致腾科技有限公司 | A kind of short spacing binode earth magnetism vehicle speed detection system and detection method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001331889A (en) * | 2000-05-23 | 2001-11-30 | Mitsubishi Heavy Ind Ltd | Vehicle speed detection system, overspeed warning system using the same, and congestion information providing system |
| CN101236697A (en) * | 2007-08-08 | 2008-08-06 | 中科院嘉兴中心微系统所分中心 | Wireless sensor network system and detection method utilizing huge magneto-resistance magnetic-sensing technology for detecting vehicle information |
| CN101577050A (en) * | 2008-12-25 | 2009-11-11 | 四川川大智胜软件股份有限公司 | Intelligent traffic digital monitor and application thereof |
| CN201440302U (en) * | 2009-08-07 | 2010-04-21 | 浙江富阳市新源交通电子有限公司 | Wireless vehicle detector |
| CN201957251U (en) * | 2010-12-17 | 2011-08-31 | 北京时代凌宇科技有限公司 | Wireless standard signal access terminal |
-
2011
- 2011-09-28 CN CN2011102911848A patent/CN102436749A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001331889A (en) * | 2000-05-23 | 2001-11-30 | Mitsubishi Heavy Ind Ltd | Vehicle speed detection system, overspeed warning system using the same, and congestion information providing system |
| CN101236697A (en) * | 2007-08-08 | 2008-08-06 | 中科院嘉兴中心微系统所分中心 | Wireless sensor network system and detection method utilizing huge magneto-resistance magnetic-sensing technology for detecting vehicle information |
| CN101577050A (en) * | 2008-12-25 | 2009-11-11 | 四川川大智胜软件股份有限公司 | Intelligent traffic digital monitor and application thereof |
| CN201440302U (en) * | 2009-08-07 | 2010-04-21 | 浙江富阳市新源交通电子有限公司 | Wireless vehicle detector |
| CN201957251U (en) * | 2010-12-17 | 2011-08-31 | 北京时代凌宇科技有限公司 | Wireless standard signal access terminal |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112359A (en) * | 2013-04-22 | 2014-10-22 | 徐州工程学院 | Vehicle type and speed detection device based on bias magnetic field and working method |
| CN104112359B (en) * | 2013-04-22 | 2016-02-10 | 徐州工程学院 | A kind of type of vehicle based on bias magnetic field, speed detector |
| CN105761497A (en) * | 2013-04-22 | 2016-07-13 | 徐州工程学院 | Vehicle solid line pressing detection method and solid line pressing snapshooting device |
| CN105761497B (en) * | 2013-04-22 | 2017-12-01 | 徐州工程学院 | A kind of vehicle compacting line detecting method and compacting line grasp shoot device |
| CN103680152A (en) * | 2013-12-13 | 2014-03-26 | 青岛海信网络科技股份有限公司 | Vehicle detecting method and system |
| CN103680152B (en) * | 2013-12-13 | 2015-12-09 | 青岛海信网络科技股份有限公司 | Vehicle checking method and system |
| CN104835326A (en) * | 2015-04-24 | 2015-08-12 | 周欣 | Vehicle detector based on anisotropy magnetic resistance sensor array |
| CN106355898A (en) * | 2016-11-04 | 2017-01-25 | 南京理工大学 | Method and device for speed measurement based on geomagnetic sensing |
| CN110310491A (en) * | 2019-06-24 | 2019-10-08 | 武汉致腾科技有限公司 | A kind of short spacing binode earth magnetism vehicle speed detection system and detection method |
| CN110310491B (en) * | 2019-06-24 | 2020-10-27 | 武汉致腾科技有限公司 | Short-distance double-node geomagnetic vehicle speed detection system and detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102360523B (en) | Wireless vehicle detector and method for turning on and off detector | |
| CN102436749A (en) | Wireless vehicle detector and vehicle speed detection method thereof | |
| CN103942965B (en) | geomagnetic vehicle detector | |
| CN203480727U (en) | Driver yard driving test checking system by using GPS technology | |
| CN105510870A (en) | Smart device indoor positioning system and smart device indoor positioning method | |
| CN106683484A (en) | Detection system and detection method for judging parking space occupancy state in real time | |
| CN202031580U (en) | Active magnetic field calibrator with MWD (measurement while drilling) directional probe | |
| CN102354454B (en) | Vehicle speed measuring method | |
| CN100461229C (en) | Method for detecting induction coil velocimeter | |
| CN104835326A (en) | Vehicle detector based on anisotropy magnetic resistance sensor array | |
| CN201051149Y (en) | Radio car detector | |
| CN106846900A (en) | A kind of Roadside Parking position piezoelectric cable laying structure and the method for parking space state detection | |
| CN103983862A (en) | Thunder early warning method based on wireless transmission and mobile internet honeycomb structure detector | |
| CN102411845A (en) | Piezoelectric magnetic-sensing traffic information comprehensive monitoring device | |
| CN109060078B (en) | Water level monitoring device | |
| CN100501796C (en) | Minisize buried automobile detector | |
| CN102866031B (en) | The method of testing of a kind of loading position and bridge response relation | |
| CN103136984A (en) | Driving test system based on global position system (GPS) | |
| CN202711467U (en) | Vehicle detecting device based on magnetic sensor | |
| CN202362936U (en) | Wireless vehicle detector | |
| CN206726211U (en) | A kind of GIS data harvester | |
| CN2731611Y (en) | Buried multifunction vehicle detector | |
| CN1707283A (en) | Underground intelligent vehicle detector | |
| CN2836131Y (en) | Vehicle detector | |
| CN213517304U (en) | Monitoring device for potential change of town gas pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120502 |