Method for searching maximum absolute value of reciprocal noise-containing fitted square waves

A search method and absolute value technology, applied in the direction of force/torque/work measuring instruments, measuring devices, instruments, etc., which can solve the high-frequency burrs of mutually inverse noisy quasi-square waves, prone to misjudgments, and opposite amplitudes. It can improve the search success rate and reduce the misjudgment rate.

Inactive Publication Date: 2015-12-16
NANJING INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a search method for the maximum absolute value of the mutually reversed noisy quasi-square wave, to solve the problem that the mutually reversed noisy quasi-square wave has high-frequency burrs and is not smooth, and the amplitude The value alternates in reverse and presents a non-monotonic change. When it is required to automatically determine the maximum absolute value, it is prone to misjudgment technical problems

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Embodiment Construction

[0013] The present invention will be further described below, and the following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0014] The search method for the maximum absolute value of the mutually inverse noisy quasi-square wave comprises the following steps:

[0015] Step 1: Set the sampling frequency f s＝ 10f 0 , f 0＝ 1 / T d ,T d For the minimum period of the quasi-square wave, the array {x} is acquired with equal duration on the noisy quasi-square wave, ensuring that the length of the array covers 4 to 5 noisy quasi-square waves. Array acquisition duration can be selected It can not only ensure that the length of the array covers 4 to 5 noisy pseudo-square waves, but also avoid excessive memory usage and slow calculation caused by too many collected values. It is the best embodiment of the present invention, and the collection time is selected as 6T ...

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Abstract

The invention discloses a method for searching the maximum absolute value of reciprocal noise-containing fitted square waves. The method includes the following steps that: a sampling frequency is set, and equal-duration array acquisition is performed on the noise-containing fitted square waves, so that an array {x} can be obtained, and the length of the array {x} assuredly cover 4 to 5 noise-containing fitted square waves; absolute value traversal is performed on the array {x}; and all data in the array {x} which has been subjected to absolute value traversal are sequenced according to a small-to-large order, and the last datum is the maximum absolute value in all the data in the array {x}. With the method of the invention adopted, the maximum absolute value of the reciprocal noise-containing fitted square waves of which the minimum period is Td can be automatically determined, and the misjudgment rate of a computer program can be decreased, and the success rate of search can be improved. The method is applied to occasions presenting a reciprocal noise-containing fitted square wave form, such as a metro platform screen door maximum kinetic energy test system.

Description

technical field [0001] The invention relates to a search method for the maximum absolute value of a mutually reversed noise-containing quasi-square wave, belonging to the technical field of signal acquisition and analysis. Background technique [0002] For the reciprocal and anti-noisy quasi-square wave, because it contains high-frequency burrs and is not smooth, and the amplitude is reversed and alternated to present a non-monotonic change, it is easy to make mistakes when it is required to automatically determine the maximum absolute value in signal acquisition and analysis. sentenced. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a search method for the maximum absolute value of the mutually reversed noisy quasi-square wave, to solve the problem that the mutually reversed noisy quasi-square wave has high-frequency burrs and is not smooth, and the amplitude The value alternates opposi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00
Inventor 张雨王玉国
Owner NANJING INST OF TECH
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