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Efficient noise and vibration collection and detection method

A detection method and noise technology, applied in the field of gearboxes, can solve the problems of troublesome acceptance, complicated structure, troublesome use, etc., and achieve the effect of being conducive to popularization and simple structure

Inactive Publication Date: 2021-02-02
湖南衡标检测技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned patent has the following disadvantages. It uses a variety of sensors to realize the fault diagnosis of the gearbox. First, its structure is relatively complicated and it is troublesome to use. Second, it needs to cooperate with the vehicle and start the vehicle to perform diagnosis under working conditions. , it is more troublesome for the acceptance of factory manufacturing

Method used

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  • Efficient noise and vibration collection and detection method

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Effect test

Embodiment 1

[0031] A high-efficiency noise and vibration collection and detection method, including a test bench device and a test system, the test bench device is an electric closed test bench, and its mechanical structure includes a motor 1, a shaft coupling 2, a speed sensor, and a torque sensor connected in sequence One 3, coupling two 4, transmission 5, coupling three 6, speed, torque sensor two 7, coupling four 8 and loading motor 9, the test system includes YE5852 charge amplifier, YE5952 charge amplifier, vibration Sensor, microphone, DAS interface box and PC, the specific steps are as follows:

[0032] S1: Installation of mechanical components, motor 1, coupling 1 2, speed and torque sensor 1 3, coupling 2 4, transmission 5, coupling 3 6, speed and torque sensor 2 7, coupling Four 8 and loading motor 9 are sequentially installed on the test bench according to the design sequence;

[0033] S2: Install the sensor, install the vibration sensor and the microphone according to the de...

Embodiment 2

[0049] This embodiment is based on Embodiment 1, and selects 40 speed changers 5 in addition, wherein 20 are normal state, and 20 are abnormal state, first utilize the S1-S6 step among the embodiment 1, will the abnormal state The 20 transmissions 5 and the 20 transmissions 5 in normal state use the statistical feature method to train the test system, and the detection system is trained according to the statistical feature method. Let ω represent the state of transmission 5, ω 1 means normal, ω 2 Indicates abnormality, input 40 transmissions 5 known to be normal and abnormal, respectively calculate the sum of the first 50 peaks in the vibration signal frequency domain of these 40 transmissions 5, so that the normal motor and abnormal transmission 5 can be obtained for the characteristic x (the first 50 The probability distribution of the sum of peaks): p(x丨ω 1 ), p(x丨ω 2 ). Simultaneously, according to the qualified rate and the unqualified rate of the factory transmission...

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Abstract

The invention discloses an efficient noise and vibration collection and detection method, and relates to the technical field of gearboxes. The test bed comprises a test bed device and a test system, the test bed device selects an electric closed test bed, and the mechanical structure of the test bed device comprises a motor, a coupling I, a rotating speed and torque sensor I, a coupling II, a transmission, a coupling III, a rotating speed and torque sensor II, a coupling IV and a loading motor which are connected in sequence; the test system comprises a YE5852 charge amplifier, a YE5952 chargeamplifier, a vibration sensor, a microphone, a DAS interface box and a PC. The method comprises the following specific steps of mechanical part installation, sensor installation, test system connection, signal collection and load adjustment. The device is simple in structure, is suitable for diagnosis during factory manufacturing, can quickly judge the normal and abnormal conditions of the transmission according to the feature point data in actual use, is efficient and convenient, and facilitates the popularization.

Description

technical field [0001] The invention relates to the technical field of gearboxes, in particular to an efficient noise and vibration collection and detection method. Background technique [0002] Transmission fault diagnosis belongs to the scope of fault diagnosis of rotating machinery (gearbox). Fault diagnosis technology of rotating machinery is developing day by day, involving dynamic signal processing, computer, artificial intelligence and many other knowledge fields. The researches of domestic and foreign experts and scholars mainly focus on The development of rotating machinery vibration monitoring system, vibration signal processing and analysis, application of artificial intelligence, etc., among which the United States, the United Kingdom, and Japan are in the leading position in this technology. [0003] After searching, the Chinese patent publication number is CN101799361B, which discloses a vehicle gearbox fault diagnosis method and its detection system, including...

Claims

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Application Information

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IPC IPC(8): G01M13/028G01M13/021G01H11/08
CPCG01M13/028G01M13/021G01H11/08
Inventor 黄石桥陈秀娟蒋业泓
Owner 湖南衡标检测技术有限公司