Vehicle Mass Estimation Method Based on High Accuracy Positioning

Abstract

The present invention provides a vehicle mass estimation method based on high-precision positioning, which relates to the technical field of vehicle mass estimation, and comprises the following steps: acquiring vehicle ECU data stream; acquiring high-precision positioning data of the vehicle; determining the vehicle's mass according to the vehicle ECU data stream Vehicle speed, brake status and accelerator status; determine the slope angle based on high-precision positioning data; detect that the slope angle is less than the slope angle threshold, and the vehicle speed is greater than the high-speed threshold, and no brake signal is detected, calculate the vehicle weight according to the vehicle force balance formula; detect When the slope angle is less than the slope angle threshold, and the vehicle speed is less than the low speed threshold, and it is detected that the accelerator is opened, the vehicle weight is calculated according to the balance formula of the vehicle force. This program selects the appropriate working conditions and judgment conditions to obtain the vehicle quality more accurately, and considers the impact of insufficient oil lubrication on vehicle weight calculation caused by excessive vehicle slope angle, and feeds back the information of insufficient oil lubrication to the driver to remind the driver Drivers should avoid intense driving and protect engine parts.

Description

technical field [0001] The invention relates to the technical field of vehicle mass estimation, in particular to a vehicle mass estimation method based on high-precision positioning. Background technique [0002] There are two main research methods for obtaining road slope angle and vehicle mass based on sensors and vehicle longitudinal dynamics. The sensor-based identification method is to directly measure the slope angle by installing sensors on the vehicle, such as using inclination displacement sensors, inertial navigators and GPS, and then further calculate the vehicle quality. During the running of a conventional vehicle, due to the influence of the longitudinal acceleration of the vehicle body, suspension deformation and road bumps, the use of angular displacement sensors cannot obtain accurate values ​​of the road slope. Using the inertial navigator to measure the slope angle has serious lag and high cost, which is not conducive to popularization and use. The GPS f...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or the related art, and discloses a vehicle mass estimation method based on high-precision positioning, which can consider the vehicle mass calculation method at low speed and high speed. In the past, the simplified model of air resistance was often ignored in research. The present invention can accurately calculate the wind speed and wind direction of the vehicle by selecting appropriate working conditions and judgment conditions, so as to accurately obtain the vehicle mass of the vehicle through formula calculation, and overcome the problems caused by the simplified model in the past. The problem of large deviations in the calculation of vehicle mass; and the impact of insufficient engine oil lubrication on vehicle weight calculation caused by excessive vehicle slope angles, and feedback information about insufficient engine oil lubrication to the driver to remind the driver to avoid intense driving , to protect engine parts

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