Gradient sensor

Abstract

The invention discloses a gradient sensor. The gradient sensor comprises a system base chip, an accelerated speed detection unit, a control unit and an external circuit. The external circuit comprises a power supply module and a CAN bus. The system base chip is provided with a protection circuit, a communication transmitting-receiving module and a pressure regulating module connected to the power supply module. The communication transmitting-receiving module matches respectively with the CAN bus and the control unit. The accelerated speed detection unit comprises an accelerometer and an internal chip. The internal chip comprises a serial peripheral interface, a logic controller, a computation module, a filter and a digital signal processing module. The serial peripheral interface is connected to the accelerometer. The digital signal processing module is connected to the control unit. The digital signal processing module is provided with a temperature sensor. The gradient sensor has the characteristics of fast signal output speed, gradient value detection accuracy, high production efficiency and work efficiency, overload resistance and long life.

Description

technical field [0001] The invention relates to the technical field of sensors, and more specifically relates to a slope sensor used in an electronic parking brake system of an automobile. Background technique [0002] The slope sensor is used to detect the angle of the slope where the car is located. The slope sensor sends the slope angle value to the controller in the electronic parking brake system of the car through the CAN bus. After the controller forms a corresponding parking command, it drives the actuator to make the car generate a braking force corresponding to the slope angle. Realize car parking. However, the slope sensor on the market, because the detection element of the slope angle is not integrated with a digital signal processing module, outputs an analog signal, and needs a control chip for AD sampling, which has the problem of low output efficiency of the analog signal. Due to the unreasonable structure, the CAN transceiver connected to the slope sensor ...

AI Technical Summary

Problems solved by technology

[0003] The invention solves the problems of inaccurate slope measurement, low signal output efficiency and low production efficiency in the general sensor welding structure in the prior art, and provides a slope sensor through the system basic chip, acceleration detection unit, control unit and external circuit Combining innovations, the slope sensor has the characteristics of fast signal output speed, accurate measured slope value, high production efficiency and work efficiency, anti-overload function, and long service life.

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