Image identification-based vehicle load measurement method

Abstract

The invention discloses an image identification-based vehicle load measurement method and relates to the field of vehicle load measurement. Stress and deformation of a steel plate spring is in a linear relation, a picture of a mark pasted on a side surface of the steel plate spring is shot by a camera, a circle center of the mark is obtained by image identification, the deflection of the steel plate spring is obtained by calculation, a load is measured according to the deflection, so that the actual load of the whole vehicle can be obtained. An image identification method is employed, and compared with other methods, the image identification-based vehicle load measurement method is very convenient to arrange; and with a non-contact mode, a vehicle structure is not damaged, the influence ofa site structure factor is very small, and subsequent loading is very easily achieved. The accuracy can be achieved by adjusting a camera position according to a demand, and measurement with relatively high accuracy can be achieved by debugging.

Description

technical field [0001] The present application relates to the technical field of vehicle load measurement, in particular to an image recognition-based vehicle load measurement method. Background technique [0002] At present, there are two ways to measure the weight of trucks, namely contact type and non-contact type. The non-contact weight measurement method is taken as an example to illustrate below. Non-contact methods include: using infrared, laser distance measuring equipment, etc., to measure the deformation of the leaf spring, and calculate the vehicle quality. In addition, for electric vehicles driven by motors, by measuring the output torque and acceleration of the motor / engine, the mass of the vehicle can be calculated by m=ΔF / Δa. [0003] However, the accuracy of infrared ranging is not high, and the installation position is limited. The laser ranging accuracy is high but the cost is also relatively high, and the installation is limited by the structure of the ...

AI Technical Summary

Problems solved by technology

[0003] The infrared ranging accuracy is not high, and the installation position is limited

The accuracy of laser ranging is high, but the cost is relatively high, and the installation is limited by the structure of the car body. Most of them need to be installed on the top and bottom of the leaf spring, which is difficult to install.

Based on the method of acceleration and motor (engine) output torque, the accuracy of general torque measurement is not high, the data requires a lot of calculation and processing, and repeated corrections are required to achieve a certain accuracy, the accuracy is not high

The use is relatively limited, the post-installation is difficult, and repeated experiments and calibrations are required

It can be seen that the existing non-contact weighing methods generally have the problems of low accuracy and difficult installation

Images