CN202353530U - Rotating speed signal processing circuit - Google Patents
Rotating speed signal processing circuit Download PDFInfo
- Publication number
- CN202353530U CN202353530U CN 201120509769 CN201120509769U CN202353530U CN 202353530 U CN202353530 U CN 202353530U CN 201120509769 CN201120509769 CN 201120509769 CN 201120509769 U CN201120509769 U CN 201120509769U CN 202353530 U CN202353530 U CN 202353530U
- Authority
- CN
- China
- Prior art keywords
- processing circuit
- signal
- treatment circuit
- filtering processing
- square
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The utility model discloses a rotating speed signal processing circuit. The rotating speed signal processing circuit comprises a filtering processing circuit, a detecting processing circuit, an integrated operational amplifier and a shaping processing circuit, wherein the filtering processing circuit is used for filtering a rotating speed signal provided by a sensor so as to eliminate interference components out of the signal; the detecting processing circuit is used for converting the signal output by the filtering processing circuit into a rectangular wave signal which can be identified by the integrated operational amplifier; the integrated operational amplifier is used for performing high-low level judgment on the rectangular wave signal output by the detecting processing circuit, and correspondingly outputting a 0V or 5V square wave signal; and the shaping processing circuit is used for shaping the square wave signal output by the integrated operational amplifier to obtain a pulse width modulation (PWM) signal. The rotating speed signal processing circuit can meet requirement of a controller on rotating speed signal accuracy, and has the advantage of suitability for popularization and application on market.
Description
Technical field
The utility model relates to the automotive communication network field, particularly a kind of tach signal treatment circuit.
Background technology
Along with developing of automobile industry, society all has higher requirement to the quantity and the quality thereof of automobile.For the comfortableness and the fail safe that improve car steering, many automobiles have all increased electronic control unit.For example be used to control the entire car controller (HCU) of car load operation conditions, be used to control the automatic gear-box controller (TCU) that the gearbox gear automaticallyes switch, and be used for engine controller (ECU) or the like.These controllers are for the better operation of Control of Automobile, the operation conditions that must keep watch on automobile constantly, and the vehicle tach signal is the important parameter of vehicle running state, so the monitoring of vehicle tach signal is seemed particularly important.
Because domestic automobile industry is started late, the standard disunity, each employed speed probe of automobile production producer is different.Domestic common speed probe output signal generally is divided into three kinds: the square wave (low level is 0V) of a kind of output 5～12V, the sine wave of the electronegative pressure of another kind of output after the third needs electronic control unit that power supply is provided, could be exported the unipolarity square wave.Because different speed probe can be exported different tach signal, corresponding tach signal treatment circuit road is also different, makes tach signal treatment circuit road lack versatility like this.
Summary of the invention
To above-mentioned technical problem, the utility model provides a kind of can be to three kinds of tach signal treatment circuits that the sensor rotation speed signal is handled in the prior art, can satisfy the requirement of controller simultaneously to the tach signal precision, be adapted at promoting the use of on the market.
The technical scheme that realizes above-mentioned purpose is following:
The tach signal treatment circuit is characterized in that, comprises the Filtering Processing circuit, the tach signal that transducer provides is made Filtering Processing, the interference component that erasure signal comprised; And
The detection treatment circuit, the conversion of signals that the Filtering Processing circuit is exported becomes the discernible square-wave signal of integrated operatinoal amplifier; And
Integrated operatinoal amplifier carries out high-low level to the square-wave signal of detection treatment circuit output and judges, the square-wave signal of corresponding output 0V or 5V; And
The shaping treatment circuit, the square-wave signal that integrated operatinoal amplifier is exported carries out shaping, obtains pwm signal.
Adopted such scheme, the utility model utilizes passive device that the tach signal of outside input is made Filtering Processing, the interference component that erasure signal comprised; To signal demodulator, conversion of signals is become the discernible square-wave signal of integrated operatinoal amplifier then; Integrated operatinoal amplifier utilizes the principle of comparator, judges the high-low level of square-wave signal, the square-wave signal of corresponding output 0V, 5V; At last, utilize the shaping treatment circuit, obtain the more precipitous pwm signal in edge, deliver to the MCU capture-port square wave signal shaping.The utility model can both be handled for the signal of existing several kinds of vehicle speed sensor output, and can satisfy the requirement of controller to the tach signal precision, is adapted at promoting the use of on the market.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model;
Fig. 2 is the circuit theory diagrams of Fig. 1.
Embodiment
See figures.1.and.2, the tach signal treatment circuit of the utility model, by the Filtering Processing circuit, the detection treatment circuit, integrated operatinoal amplifier, the shaping treatment circuit is formed, and is elaborated in the face of the relation between every part and the each several part down:
The Filtering Processing circuit is made Filtering Processing to the tach signal that transducer provides, the interference component that erasure signal comprised.Because in the utility model two-way rotating speed input signal is arranged, the one tunnel is RS1, another road is RS2, and two paths of signals adopts identical treatment circuit, does not disturb mutually each other.To being provided with two-way Filtering Processing circuit by the two-way input signal, wherein first via Filtering Processing circuit is formed the RC filter circuit by resistance R 9 and capacitor C 64, and this first via Filtering Processing circuit is handled RS1.The second tunnel Filtering Processing circuit is formed the RC filter circuit by resistance R 107 and capacitor C 57, and this second tunnel Filtering Processing circuit is handled RS2.
The detection treatment circuit becomes the discernible square-wave signal of integrated operatinoal amplifier with the conversion of signals of Filtering Processing circuit output.The detection treatment circuit comprises voltage-stabiliser tube and diode, and voltage-stabiliser tube connects the output of Filtering Processing circuit with an end ground connection after diode is parallelly connected, the other end, and wherein voltage-stabiliser tube is the high-precision voltage-stabiliser tube of MICREL company, and the precision of voltage regulation is the highest can to reach 0.5%.Likewise; The utility model has two-way detection treatment circuit; First via detection treatment circuit is made up of voltage-stabiliser tube V50 and diode V1; This first via detection treatment circuit is handled the signal of first via Filtering Processing circuit output, after the processing with the first input end of signal conveys to integrated operatinoal amplifier.The second tunnel detection treatment circuit is made up of voltage-stabiliser tube V49 and diode V41, and this second tunnel detection treatment circuit is handled the signal of the second tunnel Filtering Processing circuit output, after the processing with second input of signal conveys to integrated operatinoal amplifier.
Integrated operatinoal amplifier N1 carries out high-low level to the square-wave signal of detection treatment circuit output and judges, the square-wave signal of corresponding output 0V or 5V.Integrated operatinoal amplifier N1 adopts the wide voltage of TI company, low-power consumption amplifier LM2904D cake core, and this amplifier working range can reach-40 ℃～125 ℃, satisfies the requirement of automobile controller.The signal that integrated operatinoal amplifier N1 provides two-way detection treatment circuit carries out high-low level respectively to be judged, if the low level of being judged as is then exported the square-wave signal of 0V, is high level if judge, and then exports the square-wave signal of 5V.
The shaping treatment circuit, the square-wave signal that integrated operatinoal amplifier is exported carries out shaping, obtains pwm signal.Because integrated operatinoal amplifier N1 output two-way square-wave signal; Therefore through two-way shaping treatment circuit the two paths of signals of integrated operatinoal amplifier N1 output is handled; The first via is shaping treatment circuit D1; The second the tunnel is shaping treatment circuit D2, and every road shaping treatment circuit all adopts the SN74AHC1G14 cake core.Handle the back signal edge time less than 10ns, littler edge is very beneficial to the accuracy that MCU catches.
Claims (5)
1. a tach signal treatment circuit is characterized in that, comprises the Filtering Processing circuit, the tach signal that transducer provides is made Filtering Processing, the interference component that erasure signal comprised; And
The detection treatment circuit, the conversion of signals that the Filtering Processing circuit is exported becomes the discernible square-wave signal of integrated operatinoal amplifier; And
Integrated operatinoal amplifier carries out high-low level to the square-wave signal of detection treatment circuit output and judges, the square-wave signal of corresponding output 0V or 5V; And
The shaping treatment circuit, the square-wave signal that integrated operatinoal amplifier is exported carries out shaping, obtains pwm signal.
2. tach signal treatment circuit according to claim 1 is characterized in that, the RC filter circuit that said Filtering Processing circuit is made up of resistance and electric capacity.
3. tach signal treatment circuit according to claim 1 is characterized in that, said detection treatment circuit comprises voltage-stabiliser tube and diode, and voltage-stabiliser tube connects the output of Filtering Processing circuit with an end ground connection after diode is parallelly connected, the other end.
4. tach signal treatment circuit according to claim 1 is characterized in that, said integrated operatinoal amplifier is the LM2904D cake core.
5. tach signal treatment circuit according to claim 1 is characterized in that, said shaping treatment circuit is the SN74AHC1G14 cake core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120509769 CN202353530U (en) | 2011-12-09 | 2011-12-09 | Rotating speed signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120509769 CN202353530U (en) | 2011-12-09 | 2011-12-09 | Rotating speed signal processing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202353530U true CN202353530U (en) | 2012-07-25 |
Family
ID=46542490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120509769 Expired - Fee Related CN202353530U (en) | 2011-12-09 | 2011-12-09 | Rotating speed signal processing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202353530U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497178A (en) * | 2011-12-09 | 2012-06-13 | 綦江齿轮传动有限公司 | Circuit and method for processing rotating speed signal |
-
2011
- 2011-12-09 CN CN 201120509769 patent/CN202353530U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497178A (en) * | 2011-12-09 | 2012-06-13 | 綦江齿轮传动有限公司 | Circuit and method for processing rotating speed signal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102497178A (en) | Circuit and method for processing rotating speed signal | |
| CN105388793B (en) | Whole vehicle controller | |
| CN101886699A (en) | Gear and fault judgment method for electric vehicle shifting mechanism | |
| CN203427869U (en) | Auxiliary parking system controller for automobile | |
| CN202353530U (en) | Rotating speed signal processing circuit | |
| CN203243311U (en) | Switching value detection apparatus based on analog-to-digital converter | |
| CN2663986Y (en) | An intelligent type monitoring device for train wheel assembly operating state | |
| CN201909996U (en) | Detection device for gear box controller of electric automobile | |
| CN104124907A (en) | Current sensor fault handling method and motor controller | |
| CN103713551A (en) | Switching amount, frequency amount and analog voltage amount multiplexing input port sampling apparatus | |
| CN202486859U (en) | Vehicle-mounted data recorder of vehicle gearbox | |
| CN202420543U (en) | Automobile sensor detecting equipment | |
| CN201340273Y (en) | Automobile direction sensor | |
| CN201637585U (en) | Portable automobile steering system testing device | |
| CN205562174U (en) | Braking rate of recovery potentiality survey analysis test device | |
| CN204359387U (en) | A kind of automobile oil mass supervising device | |
| CN203774752U (en) | Auxiliary protection apparatus based on vehicle speed detection | |
| CN203825672U (en) | Vehicle information acquisition device | |
| CN204020601U (en) | Short distance pure electric vehicle integrated controller | |
| CN203217309U (en) | Multi-path data acquisition system based on CAN bus | |
| CN202256371U (en) | Digital vehicle speed signal processing device of motor meter | |
| CN205228378U (en) | Non -contact angle sensor for EPS | |
| CN104317220A (en) | OBD bus gathering system and gathering method for driving exam system | |
| CN203274772U (en) | Device of using automobile engine broadcast data to drive electromagnetic combination instrument | |
| CN202119444U (en) | Electronic speed ratio adjuster |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20161209 |