Weigh-in-motion method of high-speed and dynamic automobile based on optical fiber grating

Abstract

The invention discloses a weigh-in-motion method of a high-speed and dynamic automobile based on an optical fiber grating. The weigh-in-motion method of the high-speed and dynamic automobile based on the optical fiber grating comprises the following steps of judging whether wheels pass or not by strain increment information of sensors on weigh plates by adopting a head wave interpretation principle, not needing to place a ground induction coil to trigger a passing vehicle, taking head wave start points as start time of the wheels loading on the weigh plates, distinguishing front and back vehicles by time interval and speed difference information of front and back axles, processing time, speed, wheel load, axle load and axle spacing information of the passing vehicle in real time, automatically alarming when some sensor has a fault, and computing a strain output again by utilizing an interpolation technique. According to the weigh-in-motion method, an error of the single wheel load is plus-minus 25%; an error of the gross vehicle weight is 10%; the maximum single wheel load is 150kN; and the weigh-in-motion method combines the traditional plate bending weigh-in-motion method and an excellent optical fiber sensing technique, so that the weigh-in-motion method has certain advancement and a practical application value.

Description

technical field [0001] The invention belongs to the technical field of dynamic weighing, and in particular relates to a high-speed dynamic vehicle dynamic weighing method based on optical fiber gratings. Background technique [0002] The vehicle load standard is an important basis for the design of highway bridges and the detection and evaluation of bearing capacity. However, the actual vehicle load conditions on highway bridges are quite different from the current norms and standards, and various diseases of bridges are very common due to this. [0003] In the past, due to the limitations of technology and means, the investigation of vehicle loads was mainly carried out by manual investigation, which was insufficient in terms of sample representativeness and capacity, which restricted the study of vehicle loads on actual roads. Due to the lack of observational data on actual vehicle loads, the vehicle load standards given by the code are basically used for various bridge wo...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to provide a high-speed dynamic vehicle dynamic weighing method based on fiber gratings, aiming to solve the problem that the current dynamic vehicle weighing method is mainly based on indoor research, and the speed of passing vehicles is required to be low, which cannot meet the requirements of high-speed vehicles on site. Test needs, there are no reports of actual field application or product problems

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