CN1635556A - Wireless vehicle detecting sensor - Google Patents
Wireless vehicle detecting sensor Download PDFInfo
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- CN1635556A CN1635556A CN 200410094087 CN200410094087A CN1635556A CN 1635556 A CN1635556 A CN 1635556A CN 200410094087 CN200410094087 CN 200410094087 CN 200410094087 A CN200410094087 A CN 200410094087A CN 1635556 A CN1635556 A CN 1635556A
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- detecting sensor
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- vehicle
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Abstract
This invention discloses a new wireless car test sensor, which comprises in order detecting coil, oscillation, single machine, emission module, emission antenna and power. The power comprises the charging coil, commute bridge and energy storing device. When there is car passing by the detecting coil top part or near part, the said oscillation outputs low frequency to the single machine and the said control emission module sends the car signals through antenna.
Description
Technical field
The present invention relates to the road traffic pick-up unit, especially a kind of sensor that is applied to the Road Detection vehicle.
Background technology
Urban transport problems is the countries in the world Universal Problems, and it directly influences expanding economy and people's life.Intelligent transportation system (ITS) is the effective way that solves serious day by day urban transport problems.Development ITS just must drop into intelligent traffic equipment, particularly traffic data collection equipment, does not have the support of intelligent traffic equipment, and ITS just has no way of realizing.In this system ensemble of ITS, traffic data collection equipment occupies critical positions, accurately obtaining various traffic datas (comprising vehicle flowrate, vehicle speed, traffic density, headstock distance, occupation rate etc.) in real time is a very important ring, only under the prerequisite of grasping a large amount of traffic datas, the possibility that realizes intelligent transportation is arranged.Detailed, sufficient traffic data will provide the foundation and the data basis of science for various decision-makings.Most important vehicle detecting sensor in the traffic data collection equipment.Have only country few in number to produce vehicle detecting sensor and intelligent transportation system in the world.Vehicle sensors still adopts big coil to realize vehicle detection, as the vehicle sensors of South Africa Nortech international corporation.Adopt large-scale coil to realize vehicle detection, it is big to have the installation work amount, need stop shortcomings such as traffic and difficulty of construction be big when transforming existing road.
Summary of the invention
Technical matters to be solved by this invention is to overcome above-mentioned the deficiencies in the prior art, provides a kind of and realizes the vehicle detecting sensor of vehicle detection by coil, and its adopts the mode of pickup coil is that power supply charges automatically, and the installation work amount is little.
For solving the problems of the technologies described above, wireless vehicle detecting sensor of the present invention, be made up of the detecting coil, oscillator, single-chip microcomputer, transmitter module, emitting antenna and the power supply that connect successively, described power supply is made up of the charge coil, rectifier bridge and the energy storage device that connect successively; Have vehicle be in described detecting coil above or near the time, the output frequency of described oscillator reduces, the output frequency of oscillator is input to described single-chip microcomputer, and single-chip microcomputer judges that described control transmitter module was sent the signal that detects vehicle when vehicle was arranged by antenna; Described charge coil is used to accept the electromagnetic field of high frequency that external charger is sent, and through described rectifier bridge described energy storage device is charged.
The diameter of described detecting coil is 50~100 millimeters.
The diameter of described charge coil is 50~200 millimeters.
Described charge coil and detecting coil are at a distance of 50~200 millimeters.
Described wireless vehicle detecting sensor also comprises an overvoltage crowbar, in order to the overvoltage of avoiding charging.
Described energy storage device can be a rechargeable battery.Described energy storage device also can be a farad capacitor.
Compared with prior art, the present invention has following beneficial effect: the emission of (one) monolithic function control transmitter module needs the signal of charging, notify the staff that the battery of vehicle sensors is charged automatically, also can utilize charge coil 2 to accept the electromagnetic field of high frequency that external charger is sent, rechargeable battery be charged automatically through rectifier bridge; (2) adopt miniature small coil and realize vehicle detection in conjunction with microprocessor, and transmit detectable signal by wireless transmitter module with wireless mode by microprocessor, the vehicle sensors volume is little, stable performance, reliable, install simple and quantities is little, easy to maintenance, cost is low, need debugging when producing, excellent performance and good manufacturability.
Description of drawings
Fig. 1 is the circuit structure diagram of wireless vehicle detecting sensor of the present invention.
Reference numeral:
1 is that detecting coil 2 is rechargeable battery for oscillator 4 for rectifier bridge 5 for charge coil 3
6 is that overvoltage crowbar 7 is emitting antenna for single-chip microcomputer 8 for transmitter module 9
Embodiment
Below in conjunction with accompanying drawing the present invention is elaborated.
The embodiment one of wireless vehicle detecting sensor of the present invention:
As shown in Figure 1, by the output frequency of detecting coil 1 as the frequency-selecting element decision oscillator of oscillator 3.Have vehicle be in detecting coil 1 above or near the time, the output frequency of oscillator 3 reduces, the output frequency of oscillator 3 is input in the single-chip microcomputer 7, single-chip microcomputer 7 judges when vehicle is arranged that control transmitter module 8 is sent the signal that detects vehicle by antenna 9.In order to save power supply, single-chip microcomputer 7 is when whenever detecting a vehicle, and signal of 8 emissions of control transmitter module is avoided when having vehicle to stop at above the vehicle sensors long-time the stop, and transmitter module 8 consumes excessive valuable power supply.
Rechargeable battery 5 is the vehicle sensors power supply, and when single-chip microcomputer 7 detects the voltage of battery 5 when low, 8 emissions of single-chip microcomputer 7 control transmitter modules need the signal of charging, notify the staff that the battery 5 of vehicle sensors is charged automatically.
Also can adopt of battery 5 chargings of non-contact induction type charging modes to vehicle sensors.During charging, charge coil 2 is accepted the electromagnetic field of high frequency that external charger is sent, and charges automatically through 4 pairs of rechargeable batteries 5 of rectifier bridge.Single-chip microcomputer 7 is monitored by the voltage of 6 pairs of batteries 5 of overvoltage crowbar during charging; if control overvoltage crowbar 6 is protected when surpassing predetermined voltage; control the signal that transmitter module 8 emissions stop to charge simultaneously, notify the staff to stop the battery 5 of vehicle sensors is charged.
The embodiment two of wireless vehicle detecting sensor of the present invention:
Only be that with the difference of embodiment one present embodiment adopts farad capacitor as energy storage device.
Single-chip microcomputer can adopt the device of little power consumption, as the MEP430 of American TI Company, the PIC16C5xx series monolithic of U.S. Micro Chip company.Transmitter module can adopt the CWRF01-SE2 of Rui Misi company, or is made by the xe1201A chip of Xemics company.Single-chip microcomputer and transmitter module also can adopt and be integrated in a device on the chip, as the PIC 12F single-chip microcomputer of U.S. Micro Chip company.The battery of vehicle sensors can adopt rechargeable battery, also can adopt farad capacitor (super capacitor).
Claims (7)
1, a kind of wireless vehicle detecting sensor is characterized in that, it is made up of the detecting coil, oscillator, single-chip microcomputer, transmitter module, emitting antenna and the power supply that connect successively, and described power supply is made up of the charge coil, rectifier bridge and the energy storage device that connect successively; Have vehicle be in described detecting coil above or near the time, the output frequency of described oscillator reduces, the output frequency of oscillator is input to described single-chip microcomputer, and single-chip microcomputer judges that described control transmitter module was sent the signal that detects vehicle when vehicle was arranged by antenna; Described charge coil is used to accept the electromagnetic field of high frequency that external charger is sent, and through described rectifier bridge described energy storage device is charged.
2, a kind of wireless vehicle detecting sensor according to claim 1 is characterized in that, the diameter of described detecting coil is 50~100 millimeters.
3, a kind of wireless vehicle detecting sensor according to claim 1 is characterized in that, the diameter of described charge coil is 50~200 millimeters.
4, a kind of wireless vehicle detecting sensor according to claim 1 is characterized in that, described charge coil and detecting coil are at a distance of 50~200 millimeters.
5, a kind of wireless vehicle detecting sensor according to claim 1 is characterized in that, it also comprises an overvoltage crowbar, in order to the overvoltage of avoiding charging.
6, a kind of wireless vehicle detecting sensor according to claim 1 is characterized in that, described energy storage device is a rechargeable battery.
7, a kind of wireless vehicle detecting sensor according to claim 1 is characterized in that, described energy storage device is a farad capacitor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB200410094087XA CN1297947C (en) | 2004-12-29 | 2004-12-29 | Wireless vehicle detecting sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB200410094087XA CN1297947C (en) | 2004-12-29 | 2004-12-29 | Wireless vehicle detecting sensor |
Publications (2)
Publication Number | Publication Date |
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CN1635556A true CN1635556A (en) | 2005-07-06 |
CN1297947C CN1297947C (en) | 2007-01-31 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CNB200410094087XA Expired - Fee Related CN1297947C (en) | 2004-12-29 | 2004-12-29 | Wireless vehicle detecting sensor |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100476900C (en) * | 2007-04-17 | 2009-04-08 | 中国科学院计算技术研究所 | Detecting method and device for communication flow |
CN102729741A (en) * | 2012-07-06 | 2012-10-17 | 合肥昌辉汽车电子有限公司 | Wireless electricity supply system for tire pressure sensor |
WO2013082786A1 (en) * | 2011-12-08 | 2013-06-13 | 无锡米兰磁传感网络有限公司 | Dual-mode vehicle detection sensor |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3868626A (en) * | 1973-07-09 | 1975-02-25 | Gulf & Western Industries | Digital loop detector system |
CA1065033A (en) * | 1974-02-21 | 1979-10-23 | Canoga Controls Corporation | Inductive loop vehicle detector |
EP0049949B1 (en) * | 1980-10-15 | 1985-12-18 | Minnesota Mining And Manufacturing Company | Apparatus for detecting a ferromagnetic material |
US4568937A (en) * | 1982-06-03 | 1986-02-04 | Microsense Systems, Limited | Induction loop vehicle detector |
JP3529266B2 (en) * | 1998-04-08 | 2004-05-24 | 松下電器産業株式会社 | Loop coil type vehicle detector and vehicle detection method |
CN1253837C (en) * | 2003-02-26 | 2006-04-26 | 陶显芳 | Distributed vehicle radio inquiry method and vehicle household registration network management systems |
-
2004
- 2004-12-29 CN CNB200410094087XA patent/CN1297947C/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100476900C (en) * | 2007-04-17 | 2009-04-08 | 中国科学院计算技术研究所 | Detecting method and device for communication flow |
WO2013082786A1 (en) * | 2011-12-08 | 2013-06-13 | 无锡米兰磁传感网络有限公司 | Dual-mode vehicle detection sensor |
CN102729741A (en) * | 2012-07-06 | 2012-10-17 | 合肥昌辉汽车电子有限公司 | Wireless electricity supply system for tire pressure sensor |
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CN1297947C (en) | 2007-01-31 |
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Granted publication date: 20070131 Termination date: 20101229 |