A method and device for accurately detecting the number of axles of automobiles on automobile scales

Abstract

An accurate detection method for the number of vehicle axles on a truck scale, which is to install an axle sensor for receiving and transmitting wheel passing information on the edge of the weighing platform of the truck scale, and receive the wheel passing information through the axle measuring sensor and It is transmitted to the microprocessor, and at the same time, the microprocessor combines the weight change of the weighing instrument of the truck scale to conduct a second judgment on the results measured by the axle sensor, and compares the front time and trailing time of the output signal of the axle sensor. The weight change measured by the weighing instrument is used as the judgment basis. When there is a significant change, it is judged that there is an axle passing; and the weight changes from light to heavy to judge that the car is moving forward, and a new axle is driving on the weighing platform; the weight is judged from heavy to light. The car is backing up, and the axle that finally drives onto the weighing platform falls out of the weighing platform. The final confirmation of the axle is determined by the computer (or microprocessor) after comparing and judging the weight measured by the truck scale weighing instrument at the arrival time of the effective signal "front" and "trailing edge" of the sensor. Misjudgment caused by the use of a single detection mode is avoided, and the accuracy is greatly improved.

Description

technical field [0001] The invention is an accurate detection device for the number of axles of automobiles, which belongs to the technical field of measurement. Background technique [0002] Highway governance overrun and weight-based tolling require accurate measurement of the number of axles of vehicles. For a long time, various forms of independent sensors have been used. Some people have tried to analyze the weight change curve of the truck scale to determine the number of axles by computer, but Not widely used due to poor accuracy. [0003] At present, the sensors actually used all use load cells. When a wheel runs over the sensor, the pressured sensor will output a voltage. Through amplification and comparison processing, it is determined whether there is a wheel running over the sensor. [0004] The advantage of using a load cell is that the sensor is better sealed and the volume is relatively compact. However, the output voltage of the load cell is low, generally ...

AI Technical Summary

Problems solved by technology

It aims to overcome the shortcomings of low sensor recognition rate in the current highway toll-by-weight system

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