Multi-channel noise and libration testing method and tester

A vibration test, multi-channel technology, applied in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problems of high price, non-concentrated functions and large volume of the noise and vibration test system
CN101021435AInactive Publication Date: 2007-08-22NANJING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV
Publication Date
2007-08-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method to test multichannel noise and shake based on computer processing has two signal input mode: hardware input and file input used for signal ex post analysis. In hardware input, firstly, take sensor and data collecting module to form continuous data collecting module connected by BNC. Then, connect the module with computer by USB for inputting signal into computer. In file input, program read data from designated file and analyze. Its analyzing process is: set parameters for task, which includes signal analyzing parameters, window function selection of spectrum and coherence analysis, average mode and its parameters, selection of average mode and weighted window function in octave-band analysis. If in hardware input, it needs point file position.
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Description

technical field

[0001] The invention relates to a noise and vibration collection and analysis system, in particular to a noise and vibration testing method and system that is portable, has a wide dynamic range, and has good stability, and uses computer software for data processing. Background technique

[0002] Noise and vibration testing is an important basis for evaluating environmental noise and vibration pollution and selecting control measures. The noise and vibration test system is an important part of the noise and vibration test, and is widely used in noise research and environmental monitoring and other occasions.

[0003] Existing testing methods include time-domain signal testing and observation. Display the waveform of the noise or vibration signal, and observe the change of the signal intuitively. spectrum analysis. Spectrum analysis is performed on the signal to obtain its spectrum information, that is, the amplitude and phase value of the signal at a certai...

Claims

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