Road vehicle traveling velocity vertical velocimeter and method thereof

Abstract

The invention discloses a road vehicle traveling velocity vertical velocimeter and a method thereof. The vertical velocimeter comprises a first optical interferometer, a laser range finder, a second optical interferometer, a timer and a control device. The first optical interferometer and the second interferometer are horizontally placed, and the included angle of the first optical interferometer and the second optical interferometer is theta. The laser range finder is placed on the angular bisector of the included angle. The first optical interferometer, the laser range finder, the second optical interferometer and the timer are all connected with the control device. According to the vertical velocimeter, a laser interference detection technology is used, the signal to noise ratio of detection is high, and the accuracy of velocity measurement is high. Compared with a laser velocimeter and a radar velocimeter (the two velocimeters need to be kept in the same straight line as a vehicle when being used for measuring), the measuring direction of the vertical velocimeter is perpendicular to a road, and using is safe. The vertical velocimeter can work in an all-weather mode, continuous measuring can be achieved, compared with coil velocity measurement, the cost is low, and a road surface does not need to be damaged.

Description

technical field [0001] The invention relates to a vertical velocimeter in the field of speed measurement, and more particularly relates to a vertical velocimeter and a method for traveling speed of a road vehicle. Background technique [0002] At present, motor vehicle speed measurement systems are roughly divided into coil speed measurement, laser speed measurement, radar speed measurement, video speed measurement and other methods. [0003] Coil speed measurement generally uses two coils. When the motor vehicle enters the first coil, electromagnetic induction will be generated in the circuit, and the timer will be triggered to start timing; after walking out of the second coil, the timing will end. Calculate the average speed of the vehicle when it passes the monitoring area. The principle of coil speed measurement is simple, the equipment cost is low, and relatively high accuracy can be obtained. The disadvantage is that the road surface will be damaged during installat...

AI Technical Summary

Problems solved by technology

The disadvantage is that the road surface will be damaged during installation and construction, which will affect the life of the road surface, and the coils in the ground are easily deformed by the environment and the extrusion of heavy vehicles, requiring frequent replacement and maintenance

But its disadvantage is that the speed measurement error is large, and it is easily affected by factors such as light

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