CN106297319A - A kind of vehicle sensor circuit for intelligent transportation - Google Patents
A kind of vehicle sensor circuit for intelligent transportation Download PDFInfo
- Publication number
- CN106297319A CN106297319A CN201610915948.9A CN201610915948A CN106297319A CN 106297319 A CN106297319 A CN 106297319A CN 201610915948 A CN201610915948 A CN 201610915948A CN 106297319 A CN106297319 A CN 106297319A
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- China
- Prior art keywords
- resistance
- audion
- circuit
- integrated transporting
- intelligent transportation
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The present invention provides a kind of vehicle sensor circuit for intelligent transportation, including antenna, antenna connects the integrating circuit producing self-oscillatory oscillating circuit with processing microwave signal, oscillating circuit and integrating circuit connect the dual-threshold voltage comparator being made up of two integrated transporting dischargings respectively, dual-threshold voltage comparator comparator output terminal connects has amplifying circuit, amplifying circuit to be used for exporting control signal.This programme relatively conventional electromagnetic induction principle vehicle detection mode, simple in construction, easily to implement, cost is relatively low；Relative to infrared detection mode, its detecting distance is remote, runs power low, can work long hours when using independent current source.
Description
Technical field
The present invention relates to intelligent transportation field, be specifically related to a kind of vehicle sensor circuit for intelligent transportation.
Background technology
Loop Vehicle Detector is a kind of based on electromagnetic induction principle wagon detector, and its sensor is one and buries
Under road surface, it is connected with the loop coil of certain operating current.When vehicle by annular ground buried coil or is parked in annular ground buried coil
Time upper, vehicle self irony cutting magnetic flux line, cause the change of wire loop inductance value, detector is by just detecting this inductance value
Can detect the existence of vehicle, in general detect this inductance variable quantity has two ways: one is to utilize phase place to latch
Device and phase comparator, the change to phase place detects；Another way is then to utilize to be constituted loop by annular ground buried coil
Coupling circuit its frequency of oscillation is detected.Owing to needs are at embedded underground induction coil, increase difficulty of construction, improve
Installation cost, coil is easy to damage under cart weight simultaneously, increases maintenance cost.
Summary of the invention
For above-mentioned prior art, present invention aim at providing a kind of vehicle sensor circuit for intelligent transportation, solve
Certainly in prior art, difficulty of construction is relatively big, the problem of high cost.
For reaching above-mentioned purpose, the technical solution used in the present invention is as follows:
A kind of vehicle sensor circuit for intelligent transportation, including antenna, antenna connects the self-oscillatory vibration of generation
Circuit and process the integrating circuit of microwave signal, oscillating circuit and integrating circuit connect be made up of two integrated transporting dischargings double respectively
Voltage limit comparator, dual-threshold voltage comparator comparator output terminal connects has amplifying circuit, amplifying circuit to be used for exporting control letter
Number.
Further, described oscillating circuit includes connecting between base stage and the colelctor electrode of NPN audion Q2, audion Q2 have
The colelctor electrode of variable capacitance C1, audion Q2 connects antenna, and the emitter stage of audion Q2 is connected to variable resistance by resistance R1
One end of R6, the variable resistance R6 other end is connected to VCC by resistivity R3, and the base stage of audion Q2 is connected to variable resistance R6
Control end.
Further, described integrating circuit includes the inductance L1 connecting antenna, and the inductance L1 other end passes sequentially through resistance R2
Colelctor electrode with resistance R4 connects NPN diode Q2, resistance R2 is parallel with electric capacity C2；Antenna passes through inductance L1 and polar capacitor
C3 is connected to the base stage of NPN audion Q1, the base stage of audion Q1 and inter-collector connection resistance R5, the current collection of audion Q1
Pole is connected to VCC by resistance R4.
Further, described dual-threshold voltage comparator includes integrated transporting discharging U1A and integrated transporting discharging U2B, integrated transporting discharging U1A's
The positive input terminal of negative input end and integrated transporting discharging U1B is connected to the base stage of audion Q1, resistance R1, resistance R7, electricity after connecting
Resistance R11 is series at the transmitting interpolar of VCC and audion Q2 and constitutes potential-divider network, resistance R1 and the resistance R7 intermediate node integrated fortune of connection
Putting the positive input terminal of U1A, node between resistance R7 and resistance R11 connects negative input end, the outfan of integrated transporting discharging U1A and integrated
The outfan of amplifier U1B is respectively by output signal after diode D1 and diode D3.
Further, amplifying circuit includes NPN audion Q3, and the base stage of audion Q3 receives signal by resistance R8, and
Connect the signal after the colelctor electrode output amplification of polarized electric capacity C6, audion Q3.
Further, described amplifying circuit is also associated with relay K, and relay K 1 is parallel with diode D2.
In the present invention, NPN audion Q2 is produced from Induced Oscillation under the positive feedback effect of variable capacitance C1, and vibration produces
Signal is launched by antenna, produces the microwave field of solid near antenna, after having vehicle to enter this microwave field, its reflection
Electromagnetic wave makes self-oscillatory amplitude and frequency change through antenna again, and the signal after change is in integrating circuit
Resistance R2 and electric capacity C3 is converted into voltage and orders, and voltage is sending into dual-threshold voltage comparator, foundation after audion Q1 amplifies
The concrete numerical value of potential-divider network is arranged, and the voltage after amplifying is beyond after set point, and dual-threshold voltage comparator will export car
Induced signal, after the amplified circuit of this signal amplifies, can drive relay or the signal for intelligent terminal to input.
Compared with prior art, beneficial effects of the present invention:
1. this programme relatively conventional electromagnetic induction principle vehicle detection mode, uses microwave mode to detect, structure letter
Single, it is not necessary to buried coil can be implemented, and cost is relatively low.
2. relative to infrared detection mode, its detecting distance is remote, runs power low, can be long-time during use independent current source
Work.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the present invention.
Detailed description of the invention
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive
Feature and/or step beyond, all can combine by any way.
The present invention will be further described below in conjunction with the accompanying drawings:
Embodiment
A kind of vehicle sensor circuit for intelligent transportation, including antenna, antenna connects the self-oscillatory vibration of generation
Circuit and process the integrating circuit of microwave signal, oscillating circuit and integrating circuit connect be made up of two integrated transporting dischargings double respectively
Voltage limit comparator, dual-threshold voltage comparator comparator output terminal connects has amplifying circuit, amplifying circuit to be used for exporting control letter
Number.
Further, described oscillating circuit includes connecting between base stage and the colelctor electrode of NPN audion Q2, audion Q2 have
The colelctor electrode of variable capacitance C1, audion Q2 connects antenna, and the emitter stage of audion Q2 is connected to variable resistance by resistance R1
One end of R6, the variable resistance R6 other end is connected to VCC by resistivity R3, and the base stage of audion Q2 is connected to variable resistance R6
Control end.
Further, described integrating circuit includes the inductance L1 connecting antenna, and the inductance L1 other end passes sequentially through resistance R2
Colelctor electrode with resistance R4 connects NPN diode Q2, resistance R2 is parallel with electric capacity C2；Antenna passes through inductance L1 and polar capacitor
C3 is connected to the base stage of NPN audion Q1, the base stage of audion Q1 and inter-collector connection resistance R5, the current collection of audion Q1
Pole is connected to VCC by resistance R4.
Further, described dual-threshold voltage comparator includes integrated transporting discharging U1A and integrated transporting discharging U2B, integrated transporting discharging U1A's
The positive input terminal of negative input end and integrated transporting discharging U1B is connected to the base stage of audion Q1, resistance R1, resistance R7, electricity after connecting
Resistance R11 is series at the transmitting interpolar of VCC and audion Q2 and constitutes potential-divider network, resistance R1 and the resistance R7 intermediate node integrated fortune of connection
Putting the positive input terminal of U1A, node between resistance R7 and resistance R11 connects negative input end, the outfan of integrated transporting discharging U1A and integrated
The outfan of amplifier U1B is respectively by output signal after diode D1 and diode D3.
Further, amplifying circuit includes NPN audion Q3, and the base stage of audion Q3 receives signal by resistance R8, and
Connect the signal after the colelctor electrode output amplification of polarized electric capacity C6, audion Q3.
Further, described amplifying circuit is also associated with relay K, and relay K 1 is parallel with diode D2.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Belong to those skilled in the art in the technical scope that the invention discloses, the change that can readily occur in or replacement, all answer
Contain within protection scope of the present invention.
Claims (6)
1. the vehicle sensor circuit for intelligent transportation, it is characterised in that include that antenna, antenna connection are produced from exciting
The oscillating circuit swung and the integrating circuit of process microwave signal, oscillating circuit and integrating circuit connect respectively by two integrated transporting dischargings
The dual-threshold voltage comparator constituted, dual-threshold voltage comparator comparator output terminal connects amplifying circuit, and amplifying circuit is for defeated
Go out control signal.
A kind of vehicle sensor circuit for intelligent transportation the most according to claim 1, it is characterised in that described vibration electricity
Road includes connecting between base stage and the colelctor electrode of NPN audion Q2, audion Q2 have variable capacitance C1, the colelctor electrode of audion Q2
Connecting antenna, the emitter stage of audion Q2 is connected to one end of variable resistance R6 by resistance R1, and the variable resistance R6 other end leads to
Crossing resistivity R3 and be connected to VCC, the base stage of audion Q2 is connected to the control end of variable resistance R6.
A kind of vehicle sensor circuit for intelligent transportation the most according to claim 1, it is characterised in that described integration electricity
Road includes the inductance L1 connecting antenna, and the inductance L1 other end passes sequentially through the collection that resistance R2 and resistance R4 connects NPN diode Q2
Electrode, resistance R2 is parallel with electric capacity C2；Antenna is connected to the base stage of NPN audion Q1 by inductance L1 and polar capacitor C3,
The base stage of audion Q1 and inter-collector connect has resistance R5, the colelctor electrode of audion Q1 to be connected to VCC by resistance R4.
A kind of vehicle sensor circuit for intelligent transportation the most according to claim 1, it is characterised in that described dual-electricity-limiting
Pressure comparator includes integrated transporting discharging U1A and integrated transporting discharging U2B, and the negative input end of integrated transporting discharging U1A and integrated transporting discharging U1B's is the most defeated
Entering the base stage being connected to audion Q1 after end connects, resistance R1, resistance R7, resistance R11 are series at sending out of VCC and audion Q2
The positive input terminal that potential-divider network, resistance R1 and resistance R7 intermediate node connect integrated transporting discharging U1A, resistance R7 and resistance is constituted between emitter-base bandgap grading
Node between R11 connects negative input end, and the outfan of integrated transporting discharging U1A and the outfan of integrated transporting discharging U1B are respectively by two poles
Output signal after pipe D1 and diode D3.
A kind of vehicle sensor circuit for intelligent transportation the most according to claim 1, it is characterised in that described amplification electricity
Road includes NPN audion Q3, and the base stage of audion Q3 receives signal by resistance R8, and connects polarized electric capacity C6, audion
Signal after the colelctor electrode output amplification of Q3.
A kind of vehicle sensor circuit for intelligent transportation the most according to claim 1, it is characterised in that described amplification electricity
Road is also associated with relay K, and relay K 1 is parallel with diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915948.9A CN106297319A (en) | 2016-10-20 | 2016-10-20 | A kind of vehicle sensor circuit for intelligent transportation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915948.9A CN106297319A (en) | 2016-10-20 | 2016-10-20 | A kind of vehicle sensor circuit for intelligent transportation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106297319A true CN106297319A (en) | 2017-01-04 |
Family
ID=57720065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610915948.9A Pending CN106297319A (en) | 2016-10-20 | 2016-10-20 | A kind of vehicle sensor circuit for intelligent transportation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106297319A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199841A (en) * | 2013-04-01 | 2013-07-10 | 洪珍 | Human body induction toilet lighting switch |
| TWI530920B (en) * | 2015-04-15 | 2016-04-21 | 均利科技股份有限公司 | Sensor for detecting parking lot |
-
2016
- 2016-10-20 CN CN201610915948.9A patent/CN106297319A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199841A (en) * | 2013-04-01 | 2013-07-10 | 洪珍 | Human body induction toilet lighting switch |
| TWI530920B (en) * | 2015-04-15 | 2016-04-21 | 均利科技股份有限公司 | Sensor for detecting parking lot |
Non-Patent Citations (3)
| Title |
|---|
| 张建华: "有线载波报警系统中的传感器和接口电路设计", 《元器件与应用》 * |
| 彭春华等: "车辆检测传感器综述", 《传感器与微系统》 * |
| 曾涛等: "带延时功能的微波自动报警系统的设计", 《现代电子技术》 * |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170104 |
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| RJ01 | Rejection of invention patent application after publication |