CN103840800A - Vehicle speed input collection circuit - Google Patents
Vehicle speed input collection circuit Download PDFInfo
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- CN103840800A CN103840800A CN201410108117.1A CN201410108117A CN103840800A CN 103840800 A CN103840800 A CN 103840800A CN 201410108117 A CN201410108117 A CN 201410108117A CN 103840800 A CN103840800 A CN 103840800A
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Abstract
The invention provides a vehicle speed input collection circuit, and belongs to the field of vehicle speed collection. The vehicle speed input collection circuit aims to solve the problems that an existing vehicle speed collection circuit adopts a triode base drive mode for collection, high and low level ranges of signals need to be matched, and compatibility is poor. The vehicle speed signal input end is in serial connection with a diode D611 in a reversed mode so as to shield influences caused by outside interference signals on a system, then vehicle speed signals are filtered through a filter circuit to obtain pure vehicle speed signals, the vehicle speed signals pass a stabilizing circuit, voltage of the vehicle speed signals is stabilized to be +8.2V, then the signals are connected with a negative input end of an operational amplifier in a conditioning circuit, a positive input end of the operational amplifier adjusts the input range of pulse recognition, and accordingly the vehicle speed input collection circuit is compatible with different vehicle speed signals. The vehicle speed input collection circuit can be used for collecting vehicle speed.
Description
Technical field
The present invention relates to a kind of speed of a motor vehicle input Acquisition Circuit.Belong to speed data collection field.
Background technology
Most pulsed speed acquisitions adopts the collection of transistor base type of drive at present, and it needs the scope of the low and high level of matched signal, and the ability of compatible different vehicle speed signal is poor, but also requires the pulse signal of input to have certain driving force.
Summary of the invention
The present invention adopts the collection of transistor base drive-type in order to solve existing speed data collection circuit, needs the low and high level scope of matched signal, causes the poor problem of compatibility.Input Acquisition Circuit and proposed the speed of a motor vehicle.
Speed of a motor vehicle input Acquisition Circuit, it comprises input diode D611, filter circuit, voltage stabilizing circuit and a Circuit tuning,
Filter circuit comprises resistance R 607, capacitor C 606, resistance R 620, capacitor C 604 and No. two diode D606,
The negative electrode of a diode D611 of described input is as vehicle speed signal collection terminal, the anode of a diode D611 of this input is one end of contact resistance R607 simultaneously, one end of one end of capacitor C 606 and resistance R 620, the other end of described capacitor C 606 connects power supply ground, the other end of described resistance R 607 connects the positive pole+12V of 12V power supply, the other end of described resistance R 620 connects one end of capacitor C 604 and the anode of No. two diode D606 simultaneously, the other end of described capacitor C 604 connects power supply ground, the negative electrode of No. two diode D606 is as the signal output part of filter circuit,
Voltage stabilizing circuit comprises voltage stabilizing didoe D604, resistance R 612, resistance R 625; The signal output part of filter circuit connects negative electrode, one end of resistance R 612 and one end of resistance R 625 of voltage stabilizing didoe D604 simultaneously, the anode of described voltage stabilizing didoe D604 is connected power supply ground with the other end of resistance R 612 simultaneously, the other end of described resistance R 625 connects the positive pole+8.5V of 8.5V power supply, and the negative electrode of described voltage stabilizing didoe D604 is as the voltage regulation signal output of voltage stabilizing circuit;
Circuit tuning comprises capacitor C 608, resistance R 614, resistance R 610, resistance R 616, No. three diode D612 and operational amplifier U601B, the inversion signal input of the voltage regulation signal output concatenation operation amplifier U601B of voltage stabilizing circuit, the two ends of capacitor C 608 connect respectively inversion signal input and the positive signal input part of described operational amplifier U601B; The positive signal input part of this operational amplifier U601B is one end, one end of resistance R 610 and one end of resistance R 614 of while contact resistance R616 also, the other end of described resistance R 614 connects power supply ground, the other end of described resistance R 610 connects the positive pole+5V of 5V power supply, the other end of described resistance R 616 connects the anode of No. three diode D612, the output of the negative electrode concatenation operation amplifier U601B of described No. three diode D612, the output of operational amplifier U601B is as vehicle speed signal output; Wherein link together as power supply ground the power supply of 5V power supply, 8.5V power supply and 12V power supply.
The present invention plays a reversed role diode D611 for shielding the impact of external interference signal on this system by vehicle speed signal input, then adopt filter circuit to carry out filtering to vehicle speed signal and obtain comparatively pure vehicle speed signal, by vehicle speed signal process voltage stabilizing circuit, by vehicle speed signal voltage stabilizing at+8.2V, then signal is connected to the reverse input end of the operational amplifier in modulate circuit, adjust the input range of pulse recognition by the positive input of operational amplifier, thereby compatible different vehicle speed signal, the acquisition range of the pulse signal of existing speed data collection circuit is many more than one times on year-on-year basis.
Speed data collection circuit of the present invention is applicable to gather the vehicle speed signal of various vehicles.
Brief description of the drawings
Fig. 1 is the principle schematic of the speed of a motor vehicle input Acquisition Circuit described in embodiment one.
Embodiment
Embodiment one: illustrate present embodiment with reference to Fig. 1, the speed of a motor vehicle input Acquisition Circuit described in present embodiment, it comprises input diode D611, filter circuit, voltage stabilizing circuit and a Circuit tuning,
Filter circuit comprises resistance R 607, capacitor C 606, resistance R 620, capacitor C 604 and No. two diode D606,
The negative electrode of a diode D611 of described input is as vehicle speed signal collection terminal, the anode of a diode D611 of this input is one end of contact resistance R607 simultaneously, one end of one end of capacitor C 606 and resistance R 620, the other end of described capacitor C 606 connects power supply ground, the other end of described resistance R 607 connects the positive pole+12V of 12V power supply, the other end of described resistance R 620 connects one end of capacitor C 604 and the anode of No. two diode D606 simultaneously, the other end of described capacitor C 604 connects power supply ground, the negative electrode of No. two diode D606 is as the signal output part of filter circuit,
Voltage stabilizing circuit comprises voltage stabilizing didoe D604, resistance R 612, resistance R 625; The signal output part of filter circuit connects negative electrode, one end of resistance R 612 and one end of resistance R 625 of voltage stabilizing didoe D604 simultaneously, the anode of described voltage stabilizing didoe D604 is connected power supply ground with the other end of resistance R 612 simultaneously, the other end of described resistance R 625 connects the positive pole+8.5V of 8.5V power supply, and the negative electrode of described voltage stabilizing didoe D604 is as the voltage regulation signal output of voltage stabilizing circuit;
Circuit tuning comprises capacitor C 608, resistance R 614, resistance R 610, resistance R 616, No. three diode D612 and operational amplifier U601B, the inversion signal input of the voltage regulation signal output concatenation operation amplifier U601B of voltage stabilizing circuit, the two ends of capacitor C 608 connect respectively inversion signal input and the positive signal input part of described operational amplifier U601B; The positive signal input part of this operational amplifier U601B is one end, one end of resistance R 610 and one end of resistance R 614 of while contact resistance R616 also, the other end of described resistance R 614 connects power supply ground, the other end of described resistance R 610 connects the positive pole+5V of 5V power supply, the other end of described resistance R 616 connects the anode of No. three diode D612, the output of the negative electrode concatenation operation amplifier U601B of described No. three diode D612, the output of operational amplifier U601B is as vehicle speed signal output; Wherein link together as power supply ground the power supply of 5V power supply, 8.5V power supply and 12V power supply.
Embodiment two: the difference of the speed of a motor vehicle input Acquisition Circuit described in present embodiment and embodiment one is, it also comprises resistance R 618, the output of one concatenation operation amplifier U601B of described resistance R 618, the other end of this resistance R 618 connects the positive pole+5V of 5V power supply.
In present embodiment, in order to adjust the amplitude of output square wave of operational amplifier, increase pull-up resistor R618 and be connected to the positive pole+5V of 5V power supply at the output of operational amplifier.
Operation principle: the reverse input end direction of operational amplifier, vehicle speed signal input is played a reversed role diode D611 for shielding the impact of external interference signal on this system, connect+12V after the positive pole of diode D611 connects pull-up resistor R607, and connect over the ground at the positive pole of D611 the input resistance R620 that connects filter capacitor C606 carries out vehicle speed signal that first filtering obtains to vehicle speed signal after, connecing over the ground filter capacitor at the output of R620 carries out filtering again to vehicle speed signal and obtains comparatively pure vehicle speed signal and input to diode D606, at the output of this diode, vehicle speed signal is sent into after voltage stabilizing circuit to the inverting input of operational amplifier, voltage stabilizing circuit is composed in parallel by voltage-stabiliser tube D604 and resistance R 612, for by vehicle speed signal voltage stabilizing at+8.2V.
The positive input direction of operational amplifier, by the voltage signal series resistance R610 of+5V, signal is divided into three tunnels by output at R610, first via signal is series resistance R614 over the ground, after the second road signal series connection resistance R 616 and diode D612, be connected to the output of operational amplifier U601B, Third Road signal is sent into the positive input of operational amplifier, for adjusting the input range of pulse recognition.In order to adjust the amplitude of output square wave of operational amplifier, connect and draw the rear connection+5V of resistance R 618 power supply at the output of operational amplifier.
Claims (2)
1. speed of a motor vehicle input Acquisition Circuit, is characterized in that, it comprises a diode of input (D611), filter circuit, voltage stabilizing circuit and Circuit tuning,
Filter circuit comprises resistance R 607, capacitor C 606, resistance R 620, capacitor C 604 and No. two diodes (D606),
The negative electrode of a diode of described input (D611) is as vehicle speed signal collection terminal, the anode of a diode of this input (D611) is one end of contact resistance R607 simultaneously, one end of one end of capacitor C 606 and resistance R 620, the other end of described capacitor C 606 connects power supply ground, the other end of described resistance R 607 connects the positive pole+12V of 12V power supply, the other end of described resistance R 620 connects one end of capacitor C 604 and the anode of No. two diodes (D606) simultaneously, the other end of described capacitor C 604 connects power supply ground, the negative electrode of No. two diodes (D606) is as the signal output part of filter circuit,
Voltage stabilizing circuit comprises voltage stabilizing didoe D604, resistance R 612, resistance R 625; The signal output part of filter circuit connects negative electrode, one end of resistance R 612 and one end of resistance R 625 of voltage stabilizing didoe D604 simultaneously, the anode of described voltage stabilizing didoe D604 is connected power supply ground with the other end of resistance R 612 simultaneously, the other end of described resistance R 625 connects the positive pole+8.5V of 8.5V power supply, and the negative electrode of described voltage stabilizing didoe D604 is as the voltage regulation signal output of voltage stabilizing circuit;
Circuit tuning comprises capacitor C 608, resistance R 614, resistance R 610, resistance R 616, No. three diodes (D612) and operational amplifier U601B, the inversion signal input of the voltage regulation signal output concatenation operation amplifier U601B of voltage stabilizing circuit, the two ends of capacitor C 608 connect respectively inversion signal input and the positive signal input part of described operational amplifier U601B; The positive signal input part of this operational amplifier U601B is one end, one end of resistance R 610 and one end of resistance R 614 of while contact resistance R616 also, the other end of described resistance R 614 connects power supply ground, the other end of described resistance R 610 connects the positive pole+5V of 5V power supply, the other end of described resistance R 616 connects the anode of No. three diodes (D612), the output of the negative electrode concatenation operation amplifier U601B of described No. three diodes (D612), the output of operational amplifier U601B is as vehicle speed signal output; Wherein link together as power supply ground the power supply of 5V power supply, 8.5V power supply and 12V power supply.
2. speed of a motor vehicle input Acquisition Circuit according to claim 1, is characterized in that, it also comprises resistance R 618, the output of a concatenation operation amplifier U601B of described resistance R 618, and the other end of this resistance R 618 connects the positive pole+5V of 5V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410108117.1A CN103840800B (en) | 2014-03-21 | 2014-03-21 | Speed of a motor vehicle input Acquisition Circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410108117.1A CN103840800B (en) | 2014-03-21 | 2014-03-21 | Speed of a motor vehicle input Acquisition Circuit |
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| CN103840800A true CN103840800A (en) | 2014-06-04 |
| CN103840800B CN103840800B (en) | 2016-06-01 |
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| CN201410108117.1A Active CN103840800B (en) | 2014-03-21 | 2014-03-21 | Speed of a motor vehicle input Acquisition Circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104796107A (en) * | 2015-05-06 | 2015-07-22 | 航天科技控股集团股份有限公司 | Automobile square-wave signal acquisition adapting method and acquisition adapter |
| CN107255732A (en) * | 2017-06-09 | 2017-10-17 | 四川新川航空仪器有限责任公司 | Measure the tachometric survey circuit of magnetic tachometer sensor signal |
| CN109309507A (en) * | 2018-11-30 | 2019-02-05 | 国网河南省电力公司信息通信公司 | One kind being based on big data power grid security management information system |
| CN111693724A (en) * | 2020-05-25 | 2020-09-22 | 五邑大学 | Vehicle speed detection system, vehicle speed detection method and computer readable storage medium |
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| JPH09232926A (en) * | 1996-02-22 | 1997-09-05 | Yazaki Corp | Speed information output device |
| US20120293218A1 (en) * | 2011-05-18 | 2012-11-22 | Denso Corporation | Drive circuit for voltage-control type of semiconductor switching device |
| CN103377490A (en) * | 2012-04-20 | 2013-10-30 | 北京天中磊智能科技有限公司 | Whole-course speed measuring module, charging card and charging system |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09232926A (en) * | 1996-02-22 | 1997-09-05 | Yazaki Corp | Speed information output device |
| US20120293218A1 (en) * | 2011-05-18 | 2012-11-22 | Denso Corporation | Drive circuit for voltage-control type of semiconductor switching device |
| CN103377490A (en) * | 2012-04-20 | 2013-10-30 | 北京天中磊智能科技有限公司 | Whole-course speed measuring module, charging card and charging system |
Non-Patent Citations (1)
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| 王俊 等: ""车速传感器试验台的系统开发"", 《测试设备》, 31 July 2011 (2011-07-31) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104796107A (en) * | 2015-05-06 | 2015-07-22 | 航天科技控股集团股份有限公司 | Automobile square-wave signal acquisition adapting method and acquisition adapter |
| CN104796107B (en) * | 2015-05-06 | 2017-10-27 | 航天科技控股集团股份有限公司 | Automobile square-wave signal gathers adaptation method and collection adapter |
| CN107255732A (en) * | 2017-06-09 | 2017-10-17 | 四川新川航空仪器有限责任公司 | Measure the tachometric survey circuit of magnetic tachometer sensor signal |
| CN109309507A (en) * | 2018-11-30 | 2019-02-05 | 国网河南省电力公司信息通信公司 | One kind being based on big data power grid security management information system |
| CN111693724A (en) * | 2020-05-25 | 2020-09-22 | 五邑大学 | Vehicle speed detection system, vehicle speed detection method and computer readable storage medium |
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| Publication number | Publication date |
|---|---|
| CN103840800B (en) | 2016-06-01 |
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Inventor after: Wu Nannan Inventor after: Li Hongmei Inventor after: Yin Haikun Inventor after: Gao Hongliang Inventor after: Liu Jinze Inventor after: Wang Jing Inventor after: Wang Shengjin Inventor before: Gao Lei Inventor before: Liu Jinze Inventor before: Wang Jing Inventor before: Li Shuchen Inventor before: Wang Shengjin |
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