Self-adaptive filtering method of dynamic axle weighing signal of vehicle

A weighing signal and dynamic axis technology, applied in the field of vehicle dynamic weighing signal processing, can solve problems such as weighing error, large weighing error, difficult low-frequency interference filtering, etc., achieve gravity impact interference suppression and eliminate noise interference , the effect of eliminating the endpoint effect
CN100489466CActive Publication Date: 2009-05-20西安航天三沃机电设备有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
西安航天三沃机电设备有限责任公司
Publication Date
2009-05-20

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Abstract

The invention relates to a self-adapting method for filtering vehicle dynamic shaft load signal, aiming to effectively eliminate weighing error due to vehicle dynamic load and remarkably improve the vehicle weighing accuracy. The invention processes the original shaft load signal by zero phase offset and low-pass filtering, so as to eliminate white noise interference and inhibit phase distortion of the shaft load signal during low-pass filtering process. The invention also adopts optimized cut-off to the original weighing signal by searching average value of extreme points of shaft load signal, so as to better inhibit gravitation impulse interference in the weighing signal. Further, the invention decomposes the weighing signal by empirical mode decomposition method, meanwhile, adopts end point continuation method in empirical mode decomposition, so as to eliminate end effect, effectively inhibit the generation of false mode and make the decomposed result relatively true. The invention eliminates low-frequency interference through empirical mode decomposition, so as to obtain true shaft load signal.
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Description

Technical field

[0001] The present invention relates to a method of processing a vehicle dynamic weighing signal, in particular a self-adaptive filtering method of a vehicle dynamic axis weight signal. Background technique

[0002] The highway vehicle dynamically weighs, which is weighing in the car, that is, the vehicle is by weighing platform at a certain speed, and weigh the weight of the weight of the vehicle, and then the weight is added, and finally the vehicle weight is obtained. . Dynamic weighing is compared with the parking static weighing, has the advantages of fast, efficient, and does not affect traffic, but the maximum disadvantage is the accuracy of weighing. This is because the power of the load cell is inevitably subject to ground unevenness, vehicle itself vibration, scale platform vibration, tire driving force, etc., these factors form additional dynamic loads on the sensor, causing Heavy error. According to the test analysis, the vibration frequency of the dyn...

Claims

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