The Hall element and the permanent

The Hall element and the permanent magnet are packaged together, and can be directly transmitted to the high-speed input port of the single-chip microcomputer through the TTL circuit buffer.    The wheel speed sensor is composed of a ring gear and a Hall sensor head. The ring gear is installed on components that rotate with the wheel, such as a half-shaft sleeve, a knuckle, and a brake chassis. In order to ensure that the wheel speed sensor has no error signal output, the sensor head should be accurately aligned with the ring gear when installing the wheel speed sensor, there should be an appropriate air gap between them, and the installation must be firm. Only in this way can it be ensured that the vibration of the car during the braking process will not interfere with and affect the sensor signal and achieve an error-free output. In order to avoid dust and splashing mud and water, proper sealing and lubrication measures should be taken.    After determining the installation scheme of the sensor and selecting the sensor, the target gear plate of the speed sensor is designed according to the installation position, the size of the installation space and the technical parameters of the sensor used. The design of the gear disc should have such requirements: the design of the gear disc should ensure that the frequency of the generated speed signal is within the measurement range of the sensor; the error of the speed measurement should be small; the output pulse signal has a suitable duty ratio; Processing, good stability.