CN212381190U - Electromagnetic square wave signal conversion circuit of wheel speed sensor - Google Patents
Electromagnetic square wave signal conversion circuit of wheel speed sensor Download PDFInfo
- Publication number
- CN212381190U CN212381190U CN202021050825.1U CN202021050825U CN212381190U CN 212381190 U CN212381190 U CN 212381190U CN 202021050825 U CN202021050825 U CN 202021050825U CN 212381190 U CN212381190 U CN 212381190U
- Authority
- CN
- China
- Prior art keywords
- resistor
- capacitor
- pin
- transceiver
- square wave
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a fast sensor square wave signal converting circuit of electromagnetic type wheel has the positive IN + of input and the negative IN-of input that are used for inputing pulse signal to and be used for exporting square wave signal's the positive OUT + of output and export negative OUT-, the circuit includes transceiver U, ordinary diode D1, ordinary diode D2, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, electric capacity C2 and electric capacity C3. The circuit can conveniently convert sine waves of pulse signals into square waves, and achieves the purposes of improving the signal-to-noise ratio and shaping, so that signal acquisition and processing are facilitated, and the reliability is high; the circuit also has the advantages of few components, small volume, convenient detection, low cost and the like.
Description
Technical Field
The utility model relates to a signal processing technology field, concretely relates to fast sensor square wave signal conversion circuit of electromagnetic type wheel.
Background
An electromagnetic wheel speed sensor, also called a magnetoelectric wheel speed sensor, generally comprises a magnetic induction sensing head and a gear ring, wherein the sensing head comprises a permanent magnet, a polar shaft, an induction coil and the like. When the wheel rotates, the gear ring (rotor) synchronous with the wheel rotates along with the wheel, teeth and gaps on the gear ring rapidly pass through the magnetic field of the sensor in sequence, and as a result, the magnetic resistance of the magnetic circuit is changed, so that induced potential in the coil is changed, and a potential pulse signal with certain amplitude and frequency is generated. The frequency of the pulses (the number of pulses generated per second) reflects the speed of the wheel rotation. The electromagnetic wheel speed sensor has the characteristics of simple structure, low cost, dirt resistance and the like, and is widely applied to ABS anti-lock brake systems of modern cars.
The potential pulse signal generated by the electromagnetic wheel speed sensor is a sine wave signal, but it is known that the sine wave signal waveform is not ideal and is prone to errors. Therefore, it is necessary to convert the sine wave signal into a square wave signal having the same frequency, and calculate the rotation speed of the wheel by detecting the frequency or period of the square wave signal. However, the currently adopted square wave signal conversion circuit has many components, high cost and low reliability.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fast sensor square wave signal converting circuit of electromagnetic type wheel, it has solved the more, with high costs and the lower defect of reliability of components and parts that present square wave signal converting circuit exists.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
an electromagnetic wheel speed sensor square wave signal conversion circuit is provided with an input positive electrode IN + and an input negative electrode IN-which are used for inputting pulse signals, and an output positive electrode OUT + and an output negative electrode OUT-which are used for outputting square wave signals, wherein the circuit comprises a transceiver U, a common diode D1, a common diode D2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2 and a capacitor C3;
wherein, one end of the resistor R1, one end of the resistor R3, the cathode of the ordinary diode D1, the anode of the ordinary diode D2 and one end of the capacitor C2 are all connected to the pin A of the transceiver U, the other end of the resistor R1 is connected to the input anode IN +, the anode of the ordinary diode D1 is connected to the input cathode IN through the resistor R2, the other end of the resistor R3 is connected between the resistor R2 and the ordinary diode D1,the negative pole of ordinary diode D2 is grounded after being connected with capacitor C1, the other end of capacitor C2 is grounded, the VCC pin of transceiver U is connected to the power, the B pin of transceiver U is connected to between ordinary diode D2 and capacitor C1 in proper order and between ordinary diode D1 and resistor R2, the GND pin of transceiver U is grounded, the RO pin of transceiver U is connected to the positive OUT + of output through resistor R4, the transceiver U' s
The pin, the DE pin and the DI pin are all connected to an output cathode OUT-, one end of the capacitor C3 is connected with an output anode OUT +, and the other end of the capacitor C3 is connected with the output cathode OUT-and then is grounded.
A further improvement is that the transceiver U is of the MAX485ESA type.
The further improvement is that the model numbers of the ordinary diode D1 and the ordinary diode D2 are both 1N 4148.
The improvement is that the resistance value of the resistor R1 is 10K, the resistance value of the resistor R2 is 10K, the resistance value of the resistor R3 is 10K, and the resistance value of the resistor R4 is 1K.
The capacitor C1 has a capacitance value of 0.1 muF, the capacitor C2 has a capacitance value of 0.1 muF, and the capacitor C3 has a capacitance value of 0.0001 muF.
The beneficial effects of the utility model reside in that: the circuit can conveniently convert sine waves of pulse signals into square waves, and achieves the purposes of improving the signal-to-noise ratio and shaping, so that signal acquisition and processing are facilitated, and the reliability is high; the circuit also has the advantages of few components, small volume, convenient detection, low cost and the like.
Drawings
Fig. 1 is a circuit diagram of a square wave signal conversion circuit of an electromagnetic wheel speed sensor.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
As shown IN fig. 1, the square wave signal conversion circuit of the electromagnetic wheel speed sensor has an input positive pole IN + and an input negative pole IN-for inputting pulse signals, and an output positive pole OUT + and an output negative pole OUT-for outputting square wave signals, and comprises a transceiver U, a common diode D1, a common diode D2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2 and a capacitor C3;
one end of the resistor R1, one end of the resistor R3, the cathode of the common diode D1, the anode of the common diode D2 and one end of the capacitor C2 are all connected to the pin A of the transceiver U, the other end of the resistor R1 is connected to the input anode IN +, the anode of the common diode D1 is connected to the input cathode IN through the resistor R2, the other end of the resistor R3 is connected between the resistor R2 and the common diode D1, the cathode of the common diode D2 is connected to the capacitor C1 and then grounded, the other end of the capacitor C2 is grounded, the VCC pin of the transceiver U is connected to a power supply, the pin B of the transceiver U is sequentially connected between the common diode D2 and the capacitor C1 and between the common diode D1 and the resistor R2, the pin of the transceiver U is grounded, the RO pin of the transceiver U is connected to the output anode OUT + through the resistor R4, and the GND pin
The pin, the DE pin and the DI pin are all connected to an output cathode OUT-, one end of the capacitor C3 is connected with an output anode OUT +, and the other end of the capacitor C3 is connected with the output cathode OUT-and then is grounded.
The utility model discloses in, transceiver U's model is MAX485ESA, and it has 8 pins, is RO pin, the receiver output of receiver output end respectively and exports the end that enables
The terminal comprises a pin, a DE pin of a driver output enabling end, a DI pin of a driver input end, a GND pin of a ground end, an A pin of a receiver non-inverting input end, a B pin of a receiver inverting input end and a VCC pin of a power supply end.
The utility model discloses in, ordinary diode D1 and ordinary diode D2's model are 1N 4148.
The utility model discloses in, resistance R1's resistance is 10K, resistance R2's resistance is 10K, resistance R3's resistance is 10K, resistance R4's resistance is 1K.
In the present invention, the capacitance value of the capacitor C1 is 0.1 μ F (104), the capacitance value of the capacitor C2 is 0.1 μ F (104), and the capacitance value of the capacitor C3 is 0.0001 μ F (101).
The utility model discloses a theory of operation does: when the pulse signal values received by the pins 6 and 7 (pin A and pin B) of the transceiver U and input from the input positive electrode IN + and the input negative electrode IN-are higher than the threshold value of the transceiver U, the pin 1 (pin RO) of the transceiver U outputs high level, and when the pulse signal values received by the pins 6 and 7 of the transceiver U and input from the input positive electrode IN + and the input negative electrode IN-are lower than the threshold value of the transceiver U, the pin 1 of the transceiver U outputs low level, thereby converting the input pulse signal into high-low level square wave signals, and other elements are mainly used for reducing system noise.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (5)
1. An electromagnetic wheel speed sensor square wave signal conversion circuit is provided with an input positive pole IN + and an input negative pole IN-for inputting pulse signals, and an output positive pole OUT + and an output negative pole OUT-for outputting square wave signals, and is characterized IN that: the circuit comprises a transceiver U, a common diode D1, a common diode D2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2 and a capacitor C3;
one end of the resistor R1, one end of the resistor R3, the cathode of the common diode D1, the anode of the common diode D2 and one end of the capacitor C2 are all connected to the pin A of the transceiver U, the other end of the resistor R1 is connected to the input anode IN +, and the other end of the common diode D1 is connected to the input anode IN +The anode is connected to the input cathode IN through a resistor R2, the other end of the resistor R3 is connected between a resistor R2 and a common diode D1, the cathode of the common diode D2 is connected with a capacitor C1 and then is grounded, the other end of the capacitor C2 is grounded, the VCC pin of the transceiver U is connected to a power supply, the pin B of the transceiver U is sequentially connected between the common diode D2 and the capacitor C1 and between the common diode D1 and the resistor R2, the GND pin of the transceiver U is grounded, the RO pin of the transceiver U is connected to the output anode OUT + through a resistor R4, and the transceiver U is connected to the output anode OUT + through a resistor R63
The pin, the DE pin and the DI pin are all connected to an output cathode OUT-, one end of the capacitor C3 is connected with an output anode OUT +, and the other end of the capacitor C3 is connected with the output cathode OUT-and then is grounded.
2. The square wave signal conversion circuit of the electromagnetic wheel speed sensor as claimed in claim 1, wherein: the type of the transceiver U is MAX485 ESA.
3. The square wave signal conversion circuit of the electromagnetic wheel speed sensor as claimed in claim 1, wherein: the model numbers of the ordinary diode D1 and the ordinary diode D2 are both 1N 4148.
4. The square wave signal conversion circuit of the electromagnetic wheel speed sensor as claimed in claim 1, wherein: the resistance value of the resistor R1 is 10K, the resistance value of the resistor R2 is 10K, the resistance value of the resistor R3 is 10K, and the resistance value of the resistor R4 is 1K.
5. The square wave signal conversion circuit of the electromagnetic wheel speed sensor as claimed in claim 1, wherein: the capacitance value of the capacitor C1 is 0.1 muF, the capacitance value of the capacitor C2 is 0.1 muF, and the capacitance value of the capacitor C3 is 0.0001 muF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021050825.1U CN212381190U (en) | 2020-06-09 | 2020-06-09 | Electromagnetic square wave signal conversion circuit of wheel speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021050825.1U CN212381190U (en) | 2020-06-09 | 2020-06-09 | Electromagnetic square wave signal conversion circuit of wheel speed sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212381190U true CN212381190U (en) | 2021-01-19 |
Family
ID=74180252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021050825.1U Active CN212381190U (en) | 2020-06-09 | 2020-06-09 | Electromagnetic square wave signal conversion circuit of wheel speed sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212381190U (en) |
-
2020
- 2020-06-09 CN CN202021050825.1U patent/CN212381190U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101738211B (en) | Device and method for measuring rotation angle of engine crankshaft | |
| CN104406515B (en) | Variable-reluctance stimulation and decoding module for measuring position angle of rotor of permanent magnet synchronous motor | |
| CN104569476A (en) | Non-contact engine speed detection circuit | |
| CN111726115B (en) | Frequency division and counting system and method for pulse signals of rotary pulse encoder | |
| CN102627115A (en) | Method and device for monitoring vehicle coming on railway based on geomagnetic anomaly | |
| CN102621345B (en) | Detection method and device of rotation speed of generator | |
| CN101382561B (en) | Tacheometry apparatus for microminiature turbojet | |
| CN212381190U (en) | Electromagnetic square wave signal conversion circuit of wheel speed sensor | |
| CN106247915B (en) | A kind of PLCD sensor signal conditioning circuits followed based on peak value and its method | |
| CN102590803A (en) | Circuit and method for processing ultrasonic echo signal of reversing radar | |
| CN106645881A (en) | Detection circuit capable of tracking peak value | |
| CN102324880B (en) | Method for detecting stochastic resonance of weak back electromotive force signal of brushless direct-current motor | |
| CN202171609U (en) | Current induction detection circuit | |
| CN203772888U (en) | Device used for acquiring detection signals of two-wire Hall sensor | |
| CN203190986U (en) | Vehicle frequency signal acquisition circuit | |
| CN205450016U (en) | Motor for electric vehicle rotor speed detector | |
| CN206193088U (en) | Detection circuitry of trackable peak value | |
| CN107193235B (en) | Method for processing nuclear grade shielding pump rotating speed signal | |
| CN108227541B (en) | Discontinuous analog differential signal frequency and phase acquisition method | |
| CN204575671U (en) | A kind of change-over circuit of wheel spin-up transducer | |
| CN211856874U (en) | Residual current transformer measurement and abnormity detection circuit based on metering unit | |
| CN209820659U (en) | Composite torque sensor of electric booster vehicle | |
| CN115389811A (en) | Zero crossing point detection circuit | |
| CN201364342Y (en) | Device for acquiring speed signals of vehicles | |
| CN201540296U (en) | Voltage type engine speed-measuring sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |