Method and device for detecting road surface planeness

Abstract

The invention discloses a method and a device for detecting road surface planeness. The device comprises a first distance measuring sensor, a second distance measuring sensor and a detection output unit, wherein the first distance measuring sensor and the second distance measuring sensor are used for respectively outputting a first altitude measuring value and a second altitude measuring value from detecting points to the ground; and the detection output unit is used for receiving the altitude measuring value and the second altitude measuring value. Because the first altitude measuring value is modified by the second altitude measuring value, road surface planeness information is obtained, and a road surface vertical altitude value is output. When a vehicle body of a measuring vehicle inclines, the road surface altitude still can be accurately measured to really reflect the road surface planeness.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, and more specifically, to a method and device for detecting road surface roughness. Background technique [0002] Road surface roughness is one of the important indicators to evaluate the performance of road surfaces. With the continuous improvement of road grades in my country and the improvement of high-grade road networks, poor road surface roughness not only affects road driving safety, but also reduces driving comfort and increases driving efficiency. Noise pollution; and increase the operating cost of the vehicle (such as increasing fuel consumption, reducing driving speed, increasing the wear and tear of vehicle parts), and accelerating structural damage, affecting the service life of the road surface and shortening the maintenance cycle. Therefore, how to test and evaluate the road surface roughness is a very important topic at present. [0003] Currently, in the measurement of ro...

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Problems solved by technology

[0006] For the application of gyroscopes to measure attitude angles, there are mainly the following disadvantages: general gyroscopes have poor stability and repeatability, and large random drift. Seriously affect the test accuracy of the angle

[0009] The inclinometer has high accuracy in measuring angles, but its response frequency is low, generally not exceeding 30Hz, and it is mainly used for quasi-static measurement

In the road surface roughness test, the test vehicle usually travels at a fast speed, generally 70-80Km / h. At this time, the response frequency of the inclinometer is not enough, so the attitude angle in the dynamic cannot be accurately measured.

[0010] The working principle of the electronic compass is to measure the earth's magnetic field, and its resolution and accuracy are low

In addition, if there are other magnetic fields other than the earth in the environment used and these magnetic fields cannot be effectively shielded, then the use of electronic compass has a big problem

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