E-ACT fixed-point position control and speed measurement system and method based on SENT protocol

Abstract

The invention relates to an E-ACT fixed-point position control and speed measurement system and method based on an SENT protocol. The system comprises an acquisition and calculation unit, an externalpower supply unit, a pulse reversing unit, an upper computer control display unit and an electric ACT sensor. The method comprises the following steps: when positioning control is started, the acquisition and calculation unit receives a positioning control command of the upper computer control display unit, adjusts a PWM pulse control signal and transmits the PWM pulse control signal to the pulsereversing unit so as to control the electric ACT sensor to move to a designated position. When a speed test is started, the acquisition and calculation unit collects and analyzes position informationof the electric ACT sensor in real time, and calculates an average speed of the electric ACT sensor. The system disclosed by the invention not only has the function of analyzing the SENT protocol, butalso can measure and calculate the ACT movement speed and accurately control the ACT position; the control response speed is high, so that the control in any position is completed within 1s; and thetime base of the measuring and calculating speed reaches up to the ns level, so that the precision is high.

Description

technical field [0001] The invention relates to the field of analysis and product application of the SENT protocol, specifically an E-ACT position control and speed measurement system and method based on the SENT protocol. Background technique [0002] At present, sensors output by the SENT (Single Edge Nibble Transmission, Chinese name is unilateral nibble transmission protocol) protocol have been used on many parts of the car. The transmission method is simple, fast and low-cost, and has been widely used abroad. Many domestic automobile manufacturers also use this kind of sensor, but most of them are imported, and there are few collection and processing units specially for this SENT protocol sensor in China. There is an engine turbocharger manufacturer that cooperates with our company, which uses SENT sensors imported from Japan, but Japan does not provide the company with acquisition and processing parts, and it is impossible to inquire about suitable units in China. In ...

AI Technical Summary

Problems solved by technology

There is an engine supercharger manufacturer that cooperates with our company, which uses SENT sensors imported from Japan, but Japan does not provide the company with acquisition and processing parts, and it is impossible to find suitable units in China

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