A detection and evaluation method for vehicle jumping at the bridge head based on vehicle-mounted gravity acceleration sensor

Abstract

The invention relates to a bridge head bump detection evaluation method based on a vehicle-mounted gravitational acceleration sensor. The method comprises the following steps: selecting the gravitational acceleration sensor, a sampling frequency, a Zigbee remote transmission module and GPS (global positioning system) equipment; determining a suggested vehicle speed; acquiring gravitational acceleration information of traveling on a road section of bridge head bump through the gravitational acceleration sensor; performing wavelet transformation on gravitational acceleration data, and finding a bump generation point of bridge head bump; transforming acceleration data around the bump point through discrete Fourier transformation to obtain power spectrum density; calculating a root-mean-square value of spectrum density of different frequency domains with a one-third octave method; according to a root-mean-square value of weighed acceleration and upper and lower limits of comfort, calculating traveling annoyance rate; by utilizing a system response algorithm and Laplace transformation, calculating an equivalent impact coefficient of bridge head bump; performing grading on comfort of bridge head bump according to the root-mean-square value of weighed acceleration and the annoyance rate; performing grading on durable damage of bridge head bump according to the equivalent impact coefficient. The method solves problems of high time and labor consumption, high price and the like of a conventional detection method.

Description

technical field [0001] The invention belongs to the technical field of road surface quality detection and information automatic collection, and in particular relates to a detection and evaluation method for vehicle jumping at a bridge head based on a vehicle-mounted gravity acceleration sensor. Background technique [0002] In recent years, my country's highway construction has achieved rapid progress, and the number of high-grade highways put into operation and use has increased year by year. Areas of land foundations are more severe, posing great difficulties for the conservation and management sector. The bridge head jumping phenomenon is the uneven settlement of the bridge and culvert structure under the action of its own weight and perennial driving load, resulting in bridge head steps at the road and bridge joints, and jumping and bumping when high-speed vehicles pass through the backfill of the abutment. [0003] At present, the research on car jumping at the bridge h...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a bridge head vehicle jump detection and evaluation method based on the vehicle-mounted gravity acceleration sensor, which is used to solve the problems of time-consuming, laborious and expensive cost of the traditional bridge head vehicle jump detection method, and proposes new evaluation parameters to accurately evaluate the bridge head The impact of jumping

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