Unmanned Smart Road Basic variable parameter automatic collection system and signal processing method

Abstract

The invention discloses an automatic unmanned intelligent roadbed deformation parameter acquisition system and a signal processing method. A vehicle in-place perceiving module is connected with a main controller, multiple roadbed deformation test sensors are connected with the main controller through an acquisition board, when a front trigger sensor has no signal output, the main controller is in a standby state, the acquisition board is in a power off state, and the whole system is in a low power consumption mode; when the vehicle in-place perceiving module outputs a signal, a power source circuit is controlled by the main controller to supply power for the acquisition board, and the whole system enters a work state. An actually-measured roadbed deformation signal contains interference components, and the least square method is utilized to eliminate a strain signal datum line zero line deviation problem; secondly, a wavelet signal interference elimination method is further utilized, noise influence is eliminated, and a signal to noise ratio is improved; lastly, a derivation method is proposed to carry out derivation of a signal after processing to acquire the peak point time, and an interval parameter between signal peaks is extracted.

Description

technical field [0001] The invention relates to an automatic acquisition system and a signal processing method of an unattended intelligent subgrade deformation parameter. Background technique [0002] Subgrade and pavement are important components of roads, and their performance is directly related to the service life of the road itself. Due to the late start of my country's high-grade highway construction, weak technical force, my country's bad climate and traffic load conditions, coupled with serious vehicle overloading, resulting in early damage to many high-grade highway pavement, in recent years, my country's high-grade pavement prematurely There are rutting, cracking, oil flooding and other damage phenomena, which seriously affect the use of roads and people's traffic. How to prevent the early damage of high-grade asphalt pavement has attracted great attention from the road traffic department of our country, and it is a major problem that needs to be solved urgently. t...

AI Technical Summary

Problems solved by technology

Existing test methods require testers to select a representative period of time each year, and use the collection system to carry out data testing and analysis on the experimental road section. Since the testers cannot stay in the test for a long time, the amount of data collected is limited; in addition, because the testers cannot The test and analysis of the signal is carried out continuously, so the test data cannot fully and accurately reflect the deformation of the subgrade

It can be seen that the existing test methods are inefficient and costly; in addition, because technicians cannot be stationed for a long time, it is impossible to obtain complete road deformation data

Images