Method and system for detecting tire dynamic vertical load during traveling period of vehicle

Abstract

The invention discloses a method for detecting the tire dynamic vertical load during traveling period of a vehicle. The method for detecting the load comprises the steps that vehicle operation speed v is measured through a GPS vehicle speed testing component; tire real-time air pressure Pre is measured through a tire pressure monitoring system; the real-time distance L of a displacement sensor installation datum plane relative to the ground is measured through a displacement sensor; and a controller collects the v, the Pre and the L in real time and processes the v, the Pre and the L through the formulas (1) and (3), and the real-time load Load of a tire is obtained. The speed of vehicle operation and the air pressure of the tire are measured in real time by measuring change of the distance between the specific point on the tire and the ground, thus the real-time load of the tire is obtained, accurate vertical real-time load information is obtained, and the load numerical precision is high.

Description

technical field [0001] The invention belongs to the technical field of vehicle detection, and in particular relates to a method and system for detecting dynamic vertical loads of tires during vehicle running. Background technique [0002] The load and air pressure of the tires directly affect the service life and safety of the tires. If the air pressure is too high and the load is too large, the tire may blow out, causing property damage and even casualties; if the air pressure is too low, the fuel consumption of the tires will increase. , The wear performance is reduced, which in turn affects the economy. Combined with the inherent characteristics of pneumatic tires, a reasonable combination of air pressure and load can significantly improve the safety and economy of tire use. Therefore, for consumers' tire selection and tire manufacturers' recommendations for tire specifications and models, real and reliable tire use Air pressure and load are critical. The current monito...

AI Technical Summary

Problems solved by technology

In summary, the tire vertical load detection method involved in this patent is difficult to be mass-produced for actual vehicles, especially trucks and buses with relatively harsh operating conditions

The patent publication number is CN103786533B, and the title of the patent is a real-time monitoring system for tire loads during vehicle driving. In this patent, the tire sinkage is obtained indirectly through the acceleration method, which is greatly affected by the vibration characteristics of the vehicle and the smoothness of the road. ; The estimation of the load does not consider the influence of the centrifugal force under the condition of high-speed rolling of the wheel, that is, the influence of the tire running speed. These two influencing factors greatly reduce the estimation accuracy of the method for the dynamic load of the tire.

[0008] 1. The measurement accuracy is low, and the changes in tire size and air pressure caused by speed and tire temperature rise are not considered; in particular, the speed has a significant impact on the tire sinkage, which will affect the estimation accuracy of the real-time tire load. See figure 1 ;

[0009] 2. The hardware requirements are high, the cost is high, and the feasibility is poor. Either custom rims or special optical acquisition hardware are required;

[0010] 3. Poor applicability, high requirements for use conditions, and cannot adapt to tire dynamic load measurement in harsh environments

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