Intelligent vehicle-mounted weighing system

Abstract

The intelligent vehicle-mounted weighing system comprises a front steering axle module, a rear driving axle module and a processor, wherein the front steering axle module is used for detecting a load acting on a front steering axle from the front end of a vehicle; the rear driving axle module is used for detecting a load acting on a rear driving axle; the processor is electrically connected with the front steering axle module and the rear driving axle module; the front steering axle module and the rear driving axle module each comprise a sensor support and sensors fixedly arranged at the upper end and the lower end of the sensor support. The sensor support is fixedly connected with the front steering axle and the rear driving axle, and the sensors are symmetrically arranged at the upper end and the lower end of the front steering axle or the rear driving axle. According to the invention, through the symmetrical differential arrangement of the sensors, the problem that the measurement error is increased due to the rise of the environment temperature or the temperature after the vehicle axle runs, which cannot be solved by other schemes, is fundamentally solved. According to the invention, the load information of the vehicle or the load information of a train combination composed of a tractor and a semitrailer can be monitored when the vehicle is static and in the running process of the vehicle.

Description

technical field [0001] The invention relates to the technical field of on-board weighing, in particular to an intelligent on-board weighing system. Background technique [0002] At present, in the road freight industry, the state is increasing its efforts to rectify overloaded transportation. Whether it is a private car owner or a logistics company, the weighing of the vehicle weight is very urgent. The whole vehicle weight weighing can not only ensure that the vehicle is not overloaded, but also make the loading capacity close to full load, so as to maximize the transportation profit. The traditional high-precision vehicle weight weighing method is to weigh the whole vehicle on the floor scale, but there are few and scattered places with floor scales, and it is very troublesome to go to the floor scale for weighing after each loading. [0003] At present, there are also on-board weighing solutions on the market, but their weighing accuracy is low and the installation is co...

AI Technical Summary

Problems solved by technology

The disadvantage of this solution is that it is necessary to install different sensors on the saddle of the tractor than on the axle of the semi-trailer, which increases the number of system components and increases the risk of system failure. The basic principle is to measure the small deformation of the axle after being loaded by the sensor, and obtain the load on the axle through the solution of the mechanical model and the mathematical model, and then obtain the bearing weight of the axle; and the scheme is not in the axle of the tractor The fundamental reason for installing the sensor on the drive axle of the tractor is that during the driving process of the tractor, due to the rotation of the gears such as the reducer and the differential inside the drive axle, and the friction with the gear oil in the axle housing, the drive axle will be in the driving process of the vehicle. It will heat up rapidly, and finally reach a thermal equilibrium state of about 70°C; while the sensor is installed on the drive axle, the measurement accuracy of the sensor will increase sharply due to the thermal expansion and contraction of the axle, and there is almost no accuracy at all.

And the method of installing the sensor on the saddle in the patent is complicated and cumbersome, which is not conducive to operation and calibration; and the patent installs the sensor on the semi-trailer, and does not consider the solution when the ambient temperature changes greatly: from the semi-trailer before the vehicle starts in winter The temperature of the axle and the environment (minus 40°C) is the same until the vehicle is running, and the temperature rise of the brake drum after the semi-trailer axle has been braked for many times is transmitted to the axle body, causing the thermal expansion and contraction of the axle to cause the sensor to The measurement error increases due to the influence of temperature, and the weighing error of this module increases sharply; at the same time, in this scheme, after the entire car train starts running, due to the complexity and low precision of the saddle weighing module in the tractor weighing method, half The weighing error of the sensor on the axle in the trailer module is affected by the change of ambient temperature and the weighing error increases sharply, which leads to the very low weighing accuracy of this solution in the actual application process

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