CN210149308U - Wheel speed sensor interface control circuit for active electronic braking system - Google Patents
Wheel speed sensor interface control circuit for active electronic braking system Download PDFInfo
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- CN210149308U CN210149308U CN201920672849.1U CN201920672849U CN210149308U CN 210149308 U CN210149308 U CN 210149308U CN 201920672849 U CN201920672849 U CN 201920672849U CN 210149308 U CN210149308 U CN 210149308U
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Abstract
The utility model provides a wheel speed sensor interface control circuit for active electronic braking system, include: the power switch unit is connected to the vehicle-mounted power supply; the high-side power supply unit is electrically connected with the positive terminal of the wheel speed sensor and the power switch unit respectively; the control unit is electrically connected with the power switch unit and the high-side power unit respectively; the signal processing unit is connected between the negative terminal of the wheel speed sensor and the control unit; the device comprises a resistor and a low-side power supply unit, wherein the resistor is connected between a negative terminal of the wheel speed sensor and the low-side power supply unit, and the low-side power supply unit is further electrically connected with the control unit. The utility model discloses a fast sensor interface control circuit of wheel can avoid fast sensor of wheel to work under abominable operational environment, effectively protects the circuit at fast sensor place of wheel, and then ensures the fail safe nature of systems such as ABS and ESC.
Description
Technical Field
The utility model belongs to the technical field of the car and specifically relates to a wheel speed sensor interface control circuit for active electronic braking system is related to.
Background
According to the requirements of national laws and regulations, modern automobiles are basically equipped with an ABS (Antilock Brake System) or an ESC (Electronic Stability Controller), and both the ABS and the ESC require a wheel speed sensor to be installed on each wheel of the vehicle so as to measure the rotating speed of each wheel, and then calculate and control the vehicle; because the wheel speed sensor is exposed outside the vehicle body and is arranged near the wheels, the working environment is very bad, and particularly in rainy and snowy weather, if an effective protection circuit is not used, the wheel speed sensor is extremely easy to damage; generally, each vehicle has at least 4 wheels, namely the number of the wheel speed sensors is generally not less than 4, and when 1 wheel speed sensor is damaged, the functions of components such as an automobile ABS/ESC and the like can be basically disabled, and the driving safety of the vehicle is seriously influenced; and the wheel speed sensor belongs to vehicle chassis part, and it is troublesome and still need install the timing after changing to change the installation.
Therefore, it is necessary to design a new wheel speed sensor interface control circuit for an active electronic brake system to overcome the above problems.
SUMMERY OF THE UTILITY MODEL
In view of the problems in the prior art, an object of the present invention is to provide a wheel speed sensor interface control circuit for active electronic braking system, which can avoid the wheel speed sensor to work under the severe working environment, effectively protect the circuit where the wheel speed sensor is located, improve the service life of the wheel speed sensor, and further ensure the safety and reliability of the ABS and ESC systems.
In order to achieve the above object, the utility model provides a fast sensor interface control circuit of wheel for active electronic braking system, it uses with the cooperation of the fast sensor of wheel, the fast sensor of wheel includes anodal wiring end and negative pole wiring end, fast sensor interface control circuit of wheel includes: the power switch unit is connected to a vehicle-mounted power supply; the high-side power supply unit is electrically connected with the positive terminal of the wheel speed sensor and the power switch unit respectively; the control unit is electrically connected with the power switch unit and the high-side power unit respectively; a signal processing unit connected between a negative terminal of the wheel speed sensor and the control unit; the wheel speed sensor comprises a resistor and a low-side power supply unit, wherein the resistor is connected between a negative terminal of the wheel speed sensor and the low-side power supply unit, and the low-side power supply unit is further electrically connected with the control unit.
As a selectable scheme, the power switch unit includes a first chip, the first chip includes a first control end, the first control end is electrically connected to a first end of a second resistor, a second end of the second resistor is electrically connected to the control unit, and a first resistor is further connected between the second end of the second resistor and a ground line.
As an optional scheme, the first chip further includes a first power input end, the first power input end is electrically connected to the vehicle-mounted power supply, a sixth capacitor and a seventh capacitor are connected in parallel between the first power input end and the ground line, the first power input end is further electrically connected to a first end of a nineteenth resistor, a second end of the nineteenth resistor is electrically connected to the control unit, and a twentieth resistor and an eighth capacitor are further connected in parallel between a second end of the nineteenth resistor and the ground line.
As an optional scheme, the first chip further includes a first power output end, the first power output end is electrically connected to the high-side power unit, a first capacitor and a second capacitor are connected in parallel between the first power output end and the ground wire, the first power output end is further electrically connected to a first end of a fourth resistor, a second end of the fourth resistor is electrically connected to the control unit, and a third capacitor and a sixth resistor are further connected in parallel between the second end of the fourth resistor and the ground wire.
As an optional scheme, the wheel speed sensor includes a first wheel speed sensor, the high-side power unit includes a second chip, the second chip includes a second control end, a second power input end and a second power output end, the second control end with an eleventh resistor is connected between the control units, an eighth resistor is further connected between the second control end and the ground wire, the second power input end and the first chip are electrically connected to the first power output end, the second power output end and a positive terminal of the first wheel speed sensor are electrically connected, the second power output end is electrically connected to a first end of a fifth resistor, a second end of the fifth resistor is electrically connected to the control unit, and a fourth capacitor and a tenth resistor are further connected in parallel between the fifth resistor and the ground wire.
As an optional scheme, the wheel speed sensor includes a second wheel speed sensor, the second chip further includes a third control end and a third power output end, a sixteenth resistor is connected between the third control end and the control unit, a seventeenth resistor is further connected between the third control end and the ground line, the third power output end is electrically connected to a positive terminal of the second wheel speed sensor, the third power output end is electrically connected to a first end of a fifteenth resistor, a second end of the fifteenth resistor is electrically connected to the control unit, and a fifth capacitor and an eighteenth resistor are further connected in parallel between the fifteenth resistor and the ground line.
As an optional scheme, the signal processing unit includes an operational amplifier, a forward signal input end of the operational amplifier is electrically connected to a first end of a twenty-fifth resistor, a second end of the twenty-fifth resistor is electrically connected to a first end of a twenty-fourth resistor, a first end of a ninth capacitor, an anode of a first diode, and a cathode of a second diode, respectively, a second end of the twenty-fourth resistor is electrically connected to a negative terminal of the first wheel speed sensor, a second end of the ninth capacitor is connected to a ground line, an anode of the first diode is connected to a first system power supply, and an anode of the second diode is connected to a ground line; a negative signal input end of the operational amplifier is electrically connected with a first end of a twenty-seventh resistor, a twenty-eighth resistor is connected between a second end of the twenty-seventh resistor and a ground wire, and a twenty-second resistor is connected between a second end of the twenty-seventh resistor and the first system power supply; a twenty-first resistor is connected between the output end of the operational amplifier and the positive signal input end of the operational amplifier, a twenty-ninth resistor is connected between the output end of the operational amplifier and the ground wire, a twenty-third resistor is connected between the output end of the operational amplifier and the first system power supply, the output end of the operational amplifier is connected with a first end of a twenty-sixth resistor, a tenth capacitor is connected between a second end of the twenty-sixth resistor and the ground wire, and the second end of the twenty-sixth resistor is electrically connected with the control unit; the positive power supply input end of the operational amplifier is electrically connected with the first system power supply, and the negative power supply input end of the operational amplifier is grounded.
Alternatively, the wheel speed sensor further includes a third wheel speed sensor and a fourth wheel speed sensor, the resistors including a first resistor, a second resistor, a third resistor, and a fourth resistor, the first resistor being connected between the low-side power supply unit and the negative terminal of the first wheel speed sensor, the second resistor being connected between the low-side power supply unit and the negative terminal of the second wheel speed sensor, the third resistor being connected between the low-side power supply unit and the negative terminal of the third wheel speed sensor, and the fourth resistor being connected between the low-side power supply unit and the negative terminal of the fourth wheel speed sensor.
As an optional scheme, each of the high-side power units is electrically connected to the first power output terminal of the first chip of the power switch unit, a first one of the high-side power units is electrically connected to a positive terminal of the first wheel speed sensor and a positive terminal of the second wheel speed sensor, and a second one of the high-side power units is electrically connected to a positive terminal of the third wheel speed sensor and a positive terminal of the fourth wheel speed sensor.
Optionally, the number of the signal processing units is four, a first signal processing unit is electrically connected to a negative terminal of the first wheel speed sensor, a second signal processing unit is electrically connected to a negative terminal of the second wheel speed sensor, a third signal processing unit is electrically connected to a negative terminal of the third wheel speed sensor, and a fourth signal processing unit is electrically connected to a negative terminal of the fourth wheel speed sensor.
Compared with the prior art, the utility model discloses a fast sensor interface control circuit of wheel for active electronic braking system can avoid fast sensor of wheel to work under abominable operational environment, effectively protects the circuit at fast sensor place of wheel, improves the life of fast sensor of wheel, and then ensures the fail safe nature of systems such as ABS and ESC.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Drawings
Fig. 1 is a schematic circuit diagram of a wheel speed sensor interface control circuit and a wheel speed sensor for an active electronic braking system according to the present invention;
fig. 2 is a schematic circuit diagram of the power switch unit of the present invention;
fig. 3 is a schematic circuit diagram of the high-side power supply unit according to the present invention;
FIG. 4 is a schematic circuit diagram of the wheel speed sensor, the resistor, the low-side power unit and the signal processing unit according to the present invention;
fig. 5 is a schematic circuit diagram of the control unit according to the present invention.
The respective symbols in the figure are as follows: 1. a power switching unit; 2. a high-side power supply unit; 3. a wheel speed sensor; 4. a resistor; 5. a low-side power supply unit; 6. a ground wire; 7. a signal processing unit; 8. a control unit.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
As shown in fig. 1 to 5, the wheel speed sensor interface control circuit for an active electronic braking system of the present invention is used in cooperation with a wheel speed sensor 3, the wheel speed sensor 3 includes a positive terminal and a negative terminal, the wheel speed sensor interface control circuit includes a power switch unit 1, a high side power unit 2, a control unit 8, a signal processing unit 7, a resistor 4 and a low side power unit 5, the power switch unit 1 is connected to a vehicle power supply, the high side power unit 2 is electrically connected to the positive terminal of the wheel speed sensor 3 and the power switch unit 1, the signal processing unit 7 is connected between the negative terminal of the wheel speed sensor 3 and the control unit 8, the resistor 4 is connected between the negative terminal of the wheel speed sensor 3 and the low side power unit 5, the control unit 8 is electrically connected to the power switch unit 1, the high side power unit 2 and the low side power unit 5, the low-side power supply unit 5 and the control unit 8 are also connected with a common ground wire 6, and the power switch unit 1, the high-side power supply unit 2, the wheel speed sensor 3, the resistor 4, the low-side power supply unit 5 and the ground wire 6 are sequentially connected to form an electric loop.
As shown in fig. 2, the power switch unit 1 of the present invention includes a first chip U1, and the first chip U1 includes a first control terminal, a first power input terminal, and a first power output terminal. The first control end is electrically connected with the first end of the second resistor R2, the second end of the second resistor R2 is electrically connected with the control unit 8, and a first resistor R1 is further connected between the second end of the second resistor R2 and the ground line. The first power input end is electrically connected with the vehicle-mounted power supply, a sixth capacitor C6 and a seventh electrolytic capacitor C7 are connected between the first power input end and the ground wire in parallel, the first power input end is also electrically connected with a first end of a nineteenth resistor R19, a second end of the nineteenth resistor R19 is electrically connected with the control unit 8, and a twentieth resistor R20 and an eighth capacitor C8 are connected between a second end of the nineteenth resistor R19 and the ground wire in parallel. The first power output end is electrically connected with the high-side power supply unit 2, a first electrolytic capacitor C1 and a second capacitor C2 are connected between the first power output end and the ground wire in parallel, the first power output end is also electrically connected with a first end of a fourth resistor R4, a second end of the fourth resistor R4 is electrically connected with the control unit 8, and a third capacitor C3 and a sixth resistor R6 are connected between a second end of the fourth resistor R4 and the ground wire in parallel. In this embodiment, other terminals of the first chip U1 may also be connected to some other electronic components as needed, as shown in fig. 2 specifically, which is not described herein again.
The vehicle-mounted power supply supplies power to the power switch unit 1 through the first power input end, the power switch unit 1 has the functions of overvoltage protection, low-voltage closing, current detection, open-leakage detection, short-circuit detection, over-temperature protection, leakage protection and the like, the control unit 8 detects a state signal fed back by the power switch unit 1 through the second end connected with the fourth resistor R4, and controls the opening and closing of the power switch unit 1 through the second end connected with the second resistor R2. When the power switch unit 1 is turned on, the first power output terminal transmits power to the high-side power.
As shown in fig. 3, the high-side power unit 2 includes a second chip U2, the wheel speed sensor 3 includes a first wheel speed sensor J1, the second chip U2 includes a second control terminal, a second power input terminal and a second power output terminal, an eleventh resistor R11 is connected between the second control terminal and the control unit 8, an eighth resistor R8 is further connected between the second control terminal and the ground, the second power input terminal is electrically connected to the first power output terminal of the first chip U1, the second power output terminal is electrically connected to the positive terminal of the first wheel speed sensor J1, the second power output terminal is electrically connected to the first terminal of the fifth resistor R5, the second terminal of the fifth resistor R5 is electrically connected to the control unit 8, and a fourth capacitor C4 and a tenth resistor R10 are further connected in parallel between the fifth resistor R5 and the ground.
In practical application, the wheel speed sensor 3 further includes a second wheel speed sensor J2, the second chip U2 further includes a third control end and a third power output end, a sixteenth resistor 16 is connected between the third control end and the control unit 8, a seventeenth resistor 17 is connected between the third control end and the ground line, the third power output end is electrically connected to the positive terminal of the second wheel speed sensor J2, the third power output end is electrically connected to the first end of the fifteenth resistor 15, the second end of the fifteenth resistor 15 is electrically connected to the control unit 8, and a fifth capacitor C5 and an eighteenth resistor R18 are connected in parallel between the fifteenth resistor 15 and the ground line. In this embodiment, other terminals of the second chip U2 may also be connected with some conventional electronic components as needed, as shown in fig. 3 specifically, which is not described herein again.
The high-side power supply has the functions of short-circuit protection, open-leakage detection, high-temperature protection and the like. The high-side power supply unit 2 is connected with the electric energy output by the power switch unit 1 through a second power input end, the control unit 8 is connected with a second control end through an eleventh resistor R11 to control a second power output end to work, the control unit 8 is also connected with a third control end through a sixteenth resistor 16 to control a third power output end to work, when the control unit 8 controls the second power output end and the third power output end to output electric energy, the second power output end outputs the electric energy to an anode terminal of the first wheel speed sensor J1, the third power output end outputs the electric energy to an anode terminal of the second wheel speed sensor J2, and a cathode terminal of the first wheel speed sensor J1 and a cathode terminal of the second wheel speed sensor J2 both output square wave voltage signals. The control unit 8 is further connected to the second power output terminal via a fifth resistor R5 to acquire a power signal at the second power output terminal, and the control unit 8 is further connected to the third power output terminal via a fifteenth resistor 15 to acquire a power signal at the third power output terminal.
The utility model discloses in, just to the gear on the wheel during the installation of first wheel speed sensor J1, first wheel speed sensor J1 produces corresponding square wave voltage signal when the wheel rolls, and the speed of a motor vehicle is faster, and square wave voltage signal's frequency is faster. The negative terminal of the first wheel speed sensor J1 outputs a square wave voltage signal, which is processed by the resistor 4 and the signal processing unit 7 in sequence and then transmitted to the control unit 8, the control unit 8 can obtain a corresponding signal frequency according to the processed square wave voltage signal, and then the rotating speed of the wheel can be calculated according to the number of teeth of the wheel.
As shown in fig. 4, the signal processing unit 7 includes an operational amplifier U4A, a forward signal input terminal of the operational amplifier U4A is electrically connected to a first terminal of a twenty-fifth resistor R25, a second terminal of the twenty-fifth resistor R25 is electrically connected to a first terminal of a twenty-fourth resistor R24, a first terminal of a ninth capacitor C9, an anode of a first diode D1, and a cathode of a second diode D2, a second terminal of the twenty-fourth resistor R24 is electrically connected to a negative terminal of the first wheel speed sensor J1, a second terminal of the ninth capacitor C9 is connected to a ground line, a cathode of the first diode D1 is connected to the first system power supply, and an anode of the second diode D2 is connected to the ground line; a negative signal input end of the operational amplifier U4A is electrically connected with a first end of the twenty-seventh resistor R27 and the ground wire, respectively, a twenty-eighth resistor R28 is connected between a second end of the twenty-seventh resistor R27 and the ground wire, and a twenty-second resistor R22 is connected between a second end of the twenty-seventh resistor R27 and the first system power supply; a twenty-first resistor R21 is connected between the output end of the operational amplifier U4A and the positive signal input end of the operational amplifier U4A, a twenty-ninth resistor R29 is connected between the output end of the operational amplifier U4A and the ground wire, a twenty-third resistor R23 is connected between the output end of the operational amplifier U4A and the first system power supply, the output end of the operational amplifier U4A is connected with a first end of a twenty-sixth resistor R26, a tenth capacitor C10 is connected between a second end of the twenty-sixth resistor R26 and the ground wire, and a second end of the twenty-sixth resistor R26 is electrically connected with the control unit 8; the positive power input terminal of the operational amplifier U4A is electrically connected to the first system power supply, and the negative power input terminal of the operational amplifier U4A is connected to ground.
In practical application, the utility model discloses a wheel speed sensor 3 still includes third wheel speed sensor and fourth wheel speed sensor, resistor 4 adopts accurate resistor, resistor 4 includes first resistor, second resistor, third resistor and fourth resistor, and first resistor is connected between the negative terminal of low side power supply unit 5 and first wheel speed sensor J1, and the second resistor is connected between the negative terminal of low side power supply unit 5 and the fast sensor J2 of second wheel, and the third resistor is connected between the negative terminal of low side power supply unit 5 and third wheel speed sensor, and the fourth resistor is connected between the negative terminal of low side power supply unit 5 and fourth wheel speed sensor.
The low-side power supply unit 5 also has short-circuit protection, open-circuit detection, high-temperature protection, and the like. The control unit 8 is connected to the low-side power supply unit 5 to control the low-side power supply unit 5.
In addition, the high-side power units 2 are two, each high-side power unit 2 is electrically connected to the first power output terminal of the first chip U1 of the power switch unit 1, the first high-side power unit 2 is electrically connected to the positive terminal of the first wheel speed sensor J1 and the positive terminal of the second wheel speed sensor J2, respectively, and the second high-side power unit 2 is electrically connected to the positive terminal of the third wheel speed sensor and the positive terminal of the fourth wheel speed sensor, respectively. The signal processing units 7 are four, the first signal processing unit 7 is electrically connected to the negative terminal of the first wheel speed sensor J1, the second signal processing unit 7 is electrically connected to the negative terminal of the second wheel speed sensor J2, the third signal processing unit 7 is electrically connected to the negative terminal of the third wheel speed sensor, and the fourth signal processing unit 7 is electrically connected to the negative terminal of the fourth wheel speed sensor.
In practical applications, the number of the wheel speed sensors 3 may be more than four, and at least one wheel speed sensor 3 is disposed on each wheel. When the control unit 8 detects that the square wave voltage signal output by the wheel speed sensor 3 is unstable under severe environmental conditions, the power switch unit 1 or the high-side power unit 2 or the low-side power unit 5 may be controlled to be disconnected from the electrical circuit, so as to stop the wheel speed sensor 3.
Furthermore, the utility model discloses a power switch unit 1's first chip U1 can adopt the VND series chip of ST (meaning semiconductor) company, and high-side power supply unit 2's second chip U2 can adopt the BTS series chip of Infineon (British flying) company, and low-side power supply unit 5 can adopt the BTS series chip of Infineon (British flying) company, control unit 8 can adopt the singlechip, but not so as the limit.
To sum up, the utility model discloses a fast sensor interface control circuit of wheel for active electronic braking system can avoid fast sensor 3 of wheel to work under abominable operational environment, effectively protects the circuit at fast sensor 3 place of wheel, improves fast sensor 3's of wheel life, and then ensures the fail safe nature of systems such as ABS and ESC.
The above detailed description of the preferred embodiments is intended to more clearly illustrate the features and spirit of the present invention, and is not intended to limit the scope of the present invention. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the scope of the claims appended hereto. The scope of the claims of the present invention should therefore be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is appropriate to the context of the description set forth above.
Claims (10)
1. A wheel speed sensor interface control circuit for an active electronic braking system for use with a wheel speed sensor, the wheel speed sensor including a positive terminal and a negative terminal, the wheel speed sensor interface control circuit comprising:
the power switch unit is connected to a vehicle-mounted power supply;
the high-side power supply unit is electrically connected with the positive terminal of the wheel speed sensor and the power switch unit respectively;
the control unit is electrically connected with the power switch unit and the high-side power unit respectively;
a signal processing unit connected between a negative terminal of the wheel speed sensor and the control unit;
the wheel speed sensor comprises a resistor and a low-side power supply unit, wherein the resistor is connected between a negative terminal of the wheel speed sensor and the low-side power supply unit, and the low-side power supply unit is further electrically connected with the control unit.
2. The wheel speed sensor interface control circuit for an active electronic brake system of claim 1, wherein the power switch unit comprises a first chip, the first chip comprises a first control terminal, the first control terminal is electrically connected to a first terminal of a second resistor, a second terminal of the second resistor is electrically connected to the control unit, and a first resistor is further connected between the second terminal of the second resistor and a ground line.
3. The wheel speed sensor interface control circuit for an active electronic braking system of claim 2, wherein the first chip further comprises a first power input terminal, the first power input terminal is electrically connected to the vehicle power supply, a sixth capacitor and a seventh capacitor are connected in parallel between the first power input terminal and a ground, the first power input terminal is further electrically connected to a first terminal of a nineteenth resistor, a second terminal of the nineteenth resistor is electrically connected to the control unit, and a twentieth resistor and an eighth capacitor are connected in parallel between a second terminal of the nineteenth resistor and the ground.
4. The wheel speed sensor interface control circuit for an active electronic braking system of claim 2, wherein the first chip further comprises a first power output terminal electrically connected to the high-side power unit, a first capacitor and a second capacitor are connected in parallel between the first power output terminal and a ground, the first power output terminal is further electrically connected to a first end of a fourth resistor, a second end of the fourth resistor is electrically connected to the control unit, and a third capacitor and a sixth resistor are connected in parallel between the second end of the fourth resistor and the ground.
5. The wheel speed sensor interface control circuit for an active electronic braking system of claim 4, characterized in that the wheel speed sensor comprises a first wheel speed sensor, the high side power supply unit comprises a second chip, the second chip comprises a second control end, a second power input end and a second power output end, an eleventh resistor is connected between the second control end and the control unit, an eighth resistor is also connected between the second control end and the ground wire, the second power input end is electrically connected with the first power output end of the first chip, the second power supply output end is electrically connected with the positive terminal of the first wheel speed sensor, the second power supply output end is electrically connected with the first end of the fifth resistor, the second end of the fifth resistor is electrically connected with the control unit, and a fourth capacitor and a tenth resistor are connected between the fifth resistor and the ground wire in parallel.
6. The wheel speed sensor interface control circuit for an active electronic braking system of claim 5, wherein the wheel speed sensor comprises a second wheel speed sensor, the second chip further comprises a third control terminal and a third power output terminal, a sixteenth resistor is connected between the third control terminal and the control unit, a seventeenth resistor is further connected between the third control terminal and a ground line, the third power output terminal is electrically connected to a positive terminal of the second wheel speed sensor, the third power output terminal is electrically connected to a first terminal of a fifteenth resistor, a second terminal of the fifteenth resistor is electrically connected to the control unit, and a fifth capacitor and an eighteenth resistor are further connected in parallel between the fifteenth resistor and the ground line.
7. The wheel speed sensor interface control circuit for an active electronic brake system as claimed in claim 5, wherein the signal processing unit comprises an operational amplifier, a forward signal input terminal of the operational amplifier is electrically connected to a first terminal of a twenty-fifth resistor, a second terminal of the twenty-fifth resistor is electrically connected to a first terminal of a twenty-fourth resistor, a first terminal of a ninth capacitor, an anode of a first diode, and a cathode of a second diode, respectively, a second terminal of the twenty-fourth resistor is electrically connected to a negative terminal of the first wheel speed sensor, a second terminal of the ninth capacitor is connected to a ground line, an anode of the first diode is connected to a first system power supply, and an anode of the second diode is connected to a ground line; a negative signal input end of the operational amplifier is electrically connected with a first end of a twenty-seventh resistor, a twenty-eighth resistor is connected between a second end of the twenty-seventh resistor and a ground wire, and a twenty-second resistor is connected between a second end of the twenty-seventh resistor and the first system power supply; a twenty-first resistor is connected between the output end of the operational amplifier and the positive signal input end of the operational amplifier, a twenty-ninth resistor is connected between the output end of the operational amplifier and the ground wire, a twenty-third resistor is connected between the output end of the operational amplifier and the first system power supply, the output end of the operational amplifier is connected with a first end of a twenty-sixth resistor, a tenth capacitor is connected between a second end of the twenty-sixth resistor and the ground wire, and the second end of the twenty-sixth resistor is electrically connected with the control unit; the positive power supply input end of the operational amplifier is electrically connected with the first system power supply, and the negative power supply input end of the operational amplifier is grounded.
8. A wheel speed sensor interface control circuit for an active electronic brake system as claimed in claim 6, wherein said wheel speed sensor further comprises a third wheel speed sensor and a fourth wheel speed sensor, said resistors comprising a first resistor, a second resistor, a third resistor and a fourth resistor, said first resistor connected between said low side power supply unit and the negative terminal of said first wheel speed sensor, said second resistor connected between said low side power supply unit and the negative terminal of said second wheel speed sensor, said third resistor connected between said low side power supply unit and the negative terminal of said third wheel speed sensor, said fourth resistor connected between said low side power supply unit and the negative terminal of said fourth wheel speed sensor.
9. The wheel speed sensor interface control circuit for an active electronic brake system of claim 8, wherein there are two high-side power units, each of the high-side power units is electrically connected to the first power output terminal of the first chip of the power switch unit, a first one of the high-side power units is electrically connected to a positive terminal of the first wheel speed sensor and a positive terminal of the second wheel speed sensor, and a second one of the high-side power units is electrically connected to a positive terminal of the third wheel speed sensor and a positive terminal of the fourth wheel speed sensor.
10. The wheel speed sensor interface control circuit for an active electronic brake system of claim 9, wherein the number of the signal processing units is four, a first of the signal processing units is electrically connected to the negative terminal of the first wheel speed sensor, a second of the signal processing units is electrically connected to the negative terminal of the second wheel speed sensor, a third of the signal processing units is electrically connected to the negative terminal of the third wheel speed sensor, and a fourth of the signal processing units is electrically connected to the negative terminal of the fourth wheel speed sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920672849.1U CN210149308U (en) | 2019-05-13 | 2019-05-13 | Wheel speed sensor interface control circuit for active electronic braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920672849.1U CN210149308U (en) | 2019-05-13 | 2019-05-13 | Wheel speed sensor interface control circuit for active electronic braking system |
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| Publication Number | Publication Date |
|---|---|
| CN210149308U true CN210149308U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920672849.1U Expired - Fee Related CN210149308U (en) | 2019-05-13 | 2019-05-13 | Wheel speed sensor interface control circuit for active electronic braking system |
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| CN (1) | CN210149308U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103911A (en) * | 2019-05-13 | 2019-08-09 | 思与行科技(苏州)有限公司 | Wheel speed sensors interface control circuit for active electronic braking system |
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2019
- 2019-05-13 CN CN201920672849.1U patent/CN210149308U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103911A (en) * | 2019-05-13 | 2019-08-09 | 思与行科技(苏州)有限公司 | Wheel speed sensors interface control circuit for active electronic braking system |
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Granted publication date: 20200317 Termination date: 20210513 |