CN204066397U - Based on the vehicle detection circuit arrangement of geomagnetic sensor - Google Patents
Based on the vehicle detection circuit arrangement of geomagnetic sensor Download PDFInfo
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- CN204066397U CN204066397U CN201420501115.4U CN201420501115U CN204066397U CN 204066397 U CN204066397 U CN 204066397U CN 201420501115 U CN201420501115 U CN 201420501115U CN 204066397 U CN204066397 U CN 204066397U
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- amplifier
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- vehicle detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 230000009977 dual effect Effects 0.000 claims abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000005358 geomagnetic field Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
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Abstract
The utility model provides the vehicle detection circuit arrangement based on geomagnetic sensor, comprises power circuit, it is characterized in that: also comprise the sensor reset circuit, sensor circuit, amplifier bias circuit and the amplifier A that are connected with power circuit respectively
1; Sensor reset circuit is connected with sensor circuit, the output terminal of sensor circuit and amplifier A
1connect; Amplifier A
1for the instrumentation amplifier of dual power supply, amplifier A
1negative supply feeder ear be connected with the output terminal of amplifier bias circuit.The utility model is a kind of novel traffic information collecting apparatus based on geomagnetic sensor network, the information collected by geomagnetic field variation by sensor amplifies output by amplifier again, because there is low-power consumption, long-life, being easy to the multiple advantages such as maintenance, in traffic information collection field, there is very wide application prospect.
Description
[technical field]
The utility model relates to transport information monitoring field, particularly a kind of vehicle detection circuit arrangement based on geomagnetic sensor.
[background technology]
Along with the development of intelligent transportation, in intelligent transportation system, traffic information collection is the part on basis the most.
Large-scale inductive coil is generally adopted to carry out vehicle detection in existing city, this method buries toroidal inductor under road surface, magnetic field is produced during toroidal inductor energising, vehicle by time the magnetic line of force in magnetic field produced to cutting thus affect electromagnetic induction change, whether exist to detect vehicle.But the shortcoming of this method is particularly remarkable, such as destroys road surface, affects road surface outward appearance; Long construction period, closing track affects traffic; Damage is difficult to investigation, maintenance difficult.Along with the development of wireless sensor network in recent years, type wireless geomagnetic sensor vehicle detection apparatus is with a wide range of applications with the feature that its volume is little.
Therefore, design a kind of vehicle detection circuit arrangement based on geomagnetic sensor that can overcome above-mentioned deficiency and seem very necessary.
[utility model content]
In view of this, for overcoming the deficiencies in the prior art, the purpose of this utility model is the defect for prior art, a kind of super low-power consumption is provided, and do not affect by weather effect and light, fiduciary level is high, the vehicle detection circuit arrangement based on geomagnetic sensor that the working time is of a specified duration.
For achieving the above object, a kind of vehicle detection circuit arrangement based on geomagnetic sensor that the utility model provides, comprise power circuit, it is characterized in that: also comprise the sensor reset circuit, sensor circuit, amplifier bias circuit and the amplifier A that are connected with power circuit respectively
1;
Sensor reset circuit is connected with sensor circuit, the output terminal of sensor circuit and amplifier A
1connect; Amplifier A
1for the instrumentation amplifier of dual power supply, amplifier A
1negative supply feeder ear be connected with the output terminal of amplifier bias circuit.
Preferably, described amplifier bias circuit comprises amplifier A
2, bias supply and voltage divider, voltage divider is powered by bias supply, the output of voltage divider and amplifier A
2in-phase input end connect, amplifier A
2inverting input and amplifier A
2output terminal connect, amplifier A
2output terminal and amplifier A
1negative supply feeder ear connect.
Further, described voltage divider is resistance in series voltage divider.
Principle of work of the present utility model is as follows: use powered battery due to type wireless geomagnetic sensor node and be laid on road surface or embed inside road, because the restriction of service condition arbitrarily cannot change supplying cell, in order to prolongedly Magnetic Sensor vehicle detection apparatus service time under certain Electronic power batteries electric power thus supplied, reach the object of low-power consumption, the circuit arrangement of geomagnetic sensor vehicle detection is taked periodically for device is powered.
Sensor: detect for magnetic field intensity, exports the change of magnetic field strength information detected;
Amplifier: the magnetic field variation signal detected by sensor carries out amplification and exports; Owing to needing two power supplys to provide normal working environment for amplifier in traditional dual power supply mode, and all use the positive-negative power supply that absolute value is equal in traditional double circuit is powered.This power supply mode increases difficulty for finding suitable dual power supply on the one hand, and the more important thing is use voltage stabilizing chip in two-supply circuit while also can the overall power of aggrandizement apparatus greatly.The dual power supply mode in " virtual earth " form replacement traditional circuit is adopted in this device." virtual earth " namely provides a certain size stable voltage at the earth terminal of amplifier, and non_direct ground.Adopt after " virtual earth " biasing circuit " " be the magnitude of voltage that biasing circuit provides.
Amplifier bias circuit: for sensor amplifier circuit provides " virtual earth " bias voltage, " virtual earth " namely provides a certain size stable voltage at the earth terminal of amplifier, and non_direct ground;
Reset circuit: for sensor provides periodically " demagnetization " reset response.
Information reads: the sample of measured value reading time " in advance " when first time arrives stationary value completes.For meeting low-power consumption request for utilization, if be desired signal when output signal mean value reaches stable, signal value need be read when first time reads " stationary value ", being " in advance " reading.
The utility model has the advantage of: the vehicle detection circuit arrangement based on geomagnetic sensor of the present utility model, can produce the principle of geomagnetic field variation by the stimulation of high-intensity magnetic field object, obtain sensor and gather magnetic field variation signal to reach the object detecting vehicle.Particularly take the independently enable power supply mode of periodicity to be each module for power supply of device, make device also have the advantage of low-power consumption.This circuit arrangement is a kind of novel traffic information collecting apparatus based on geomagnetic sensor network, the information collected by geomagnetic field variation by sensor amplifies output by amplifier again, because there is low-power consumption, long-life, being easy to the multiple advantages such as maintenance, in traffic information collection field, there is very wide application prospect.
[accompanying drawing explanation]
Fig. 1 is block diagram of the present utility model.
Fig. 2 is sequential chart of the present utility model.
In figure: power circuit 1, sensor reset circuit 2, sensor circuit 3, amplifier bias circuit 4, amplifier A
24.1, amplifier A
15.
[embodiment]
In order to understand the utility model better, below with reference to accompanying drawing and instantiation, the utility model is described in detail.
As shown in Figure 1, based on the vehicle detection circuit arrangement of geomagnetic sensor, comprise power circuit 1, it is characterized in that: also comprise the sensor reset circuit 2, sensor circuit 3, amplifier bias circuit 4 and the amplifier A that are connected with power circuit 1 respectively
15; Sensor reset circuit 2 is connected with sensor circuit 3, the output terminal of sensor circuit 3 and amplifier A
15 connect; Amplifier A
15 is the instrumentation amplifier of dual power supply, amplifier A
1the negative supply feeder ear of 5 is connected with the output terminal of amplifier bias circuit 4.
Above-mentioned amplifier bias circuit 4 comprises amplifier A
24.1, bias supply and voltage divider, voltage divider is powered by bias supply, the output of voltage divider and amplifier A
2the in-phase input end of 4.1 connects, amplifier A
2the inverting input of 4.1 and amplifier A
2the output terminal of 4.1 connects, amplifier A
2the output terminal of 4.1 and amplifier A
1the negative supply feeder ear of 5 connects.Above-mentioned voltage divider is resistance in series voltage divider.
As shown in Figure 2, for meeting low-power consumption request for utilization, when reading geomagnetic sensor output signal, repeatedly reading output signal and trying to achieve mean value, if output signal mean value is desired signal when reaching stable, (T1 place) signal value need be read when first time reads " stationary value ".
The above exemplifying embodiment only have expressed some embodiments of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (3)
1. the vehicle detection circuit arrangement based on geomagnetic sensor, comprise power circuit (1), it is characterized in that: also comprise the sensor reset circuit (2), sensor circuit (3), amplifier bias circuit (4) and the amplifier A that are connected with power circuit (1) respectively
1(5);
Sensor reset circuit (2) is connected with sensor circuit (3), the output terminal of sensor circuit (3) and amplifier A
1(5) connect; Amplifier A
1(5) be the instrumentation amplifier of dual power supply, amplifier A
1(5) negative supply feeder ear is connected with the output terminal of amplifier bias circuit (4).
2. the vehicle detection circuit arrangement based on geomagnetic sensor according to claim 1, is characterized in that: described amplifier bias circuit (4) comprises amplifier A
2(4.1), bias supply and voltage divider, voltage divider is powered by bias supply, the output of voltage divider and amplifier A
2(4.1) in-phase input end connects, amplifier A
2(4.1) inverting input and amplifier A
2(4.1) output terminal connects, amplifier A
2(4.1) output terminal and amplifier A
1(5) negative supply feeder ear connects.
3. the vehicle detection circuit arrangement based on geomagnetic sensor according to claim 2, is characterized in that: described voltage divider is resistance in series voltage divider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420501115.4U CN204066397U (en) | 2014-09-02 | 2014-09-02 | Based on the vehicle detection circuit arrangement of geomagnetic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420501115.4U CN204066397U (en) | 2014-09-02 | 2014-09-02 | Based on the vehicle detection circuit arrangement of geomagnetic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204066397U true CN204066397U (en) | 2014-12-31 |
Family
ID=52207857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420501115.4U Expired - Lifetime CN204066397U (en) | 2014-09-02 | 2014-09-02 | Based on the vehicle detection circuit arrangement of geomagnetic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204066397U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873087A (en) * | 2018-09-29 | 2018-11-23 | 重庆天箭惯性科技股份有限公司 | Rotary body geomagnetic sensor noiselike signal processing circuit |
| CN110702854A (en) * | 2019-09-19 | 2020-01-17 | 武汉慧联无限科技有限公司 | Smoke sensor |
-
2014
- 2014-09-02 CN CN201420501115.4U patent/CN204066397U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873087A (en) * | 2018-09-29 | 2018-11-23 | 重庆天箭惯性科技股份有限公司 | Rotary body geomagnetic sensor noiselike signal processing circuit |
| CN110702854A (en) * | 2019-09-19 | 2020-01-17 | 武汉慧联无限科技有限公司 | Smoke sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Vehicle detection circuit device based on terrestrial magnet sensor Effective date of registration: 20180327 Granted publication date: 20141231 Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd. Pledgor: WUHAN EASYLINKIN TECHNOLOGY CO.,LTD Registration number: 2018420000012 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190319 Granted publication date: 20141231 Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd. Pledgor: WUHAN EASYLINKIN TECHNOLOGY CO.,LTD Registration number: 2018420000012 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20141231 |