A vehicle speed acquisition system and acquisition method for ADAS and DSM products

Abstract

The invention discloses a vehicle speed acquisition system for vehicle ADAS and DSM products, which includes a GPS signal receiver, a gyroscope sensor, a speed calculation module, and a speed correction module. The GPS signal receiver and the gyroscope sensor are all connected to the speed calculation module. Both the sensor and the speed calculation module are connected with the speed correction module. The present invention also provides a vehicle speed acquisition method for vehicle ADAS and DSM products, which detects the position information and acceleration information of the current vehicle, calculates the initial speed of the vehicle between two positioning points according to the position information and acceleration information, and corrects the initial speed to obtain The current speed of the vehicle between two fixes. The vehicle speed acquisition system for ADAS and DSM products and the vehicle speed acquisition method for ADAS and DSM products can accurately detect the vehicle speed in real time, and reduce the risk of equipment installation and modification and hidden dangers in installation.

Description

technical field [0001] The invention relates to the technical field of vehicle active safety monitoring systems, in particular to a vehicle speed acquisition method for vehicle ADAS and DSM products. Background technique [0002] Vehicle active safety monitoring system ADAS and DSM are a set of safety monitoring products that monitor and assist the driver in real time. To analyze and determine the alarm level of danger and the control strategy of alarm output, there are two main ways to obtain the current vehicle speed, one is to obtain the CAN bus data of the vehicle by dismantling the vehicle parts and breaking the line, and the other is to obtain the data by cracking and converting the data. By dismantling the vehicle parts, looking for the vehicle speed signal line, breaking the line to connect to the vehicle speed signal line, and obtaining the vehicle speed signal through data conversion; the above two methods of obtaining vehicle speed have the following disadvantages...

AI Technical Summary

Problems solved by technology

[0003] 1. The vehicle CAN bus communication protocol is a custom protocol. Some vehicle manufacturers have not opened the output of vehicle speed data. To crack the CAN bus data without a communication protocol, professional engineers are required to measure and crack the data one by one, which requires a large workload and high installation efficiency. and low success rate;

[0004] 2. It is necessary to disassemble the vehicle parts and modify the vehicle communication and signal system without permission, which will cause great interference to vehicle communication and signal, and there will be a great potential safety hazard

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