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A Vibration Displacement Test Method Based on Momentum Theorem

A technique of vibration displacement and momentum theorem, applied in measurement devices, instruments, electrical devices, etc.

Active Publication Date: 2021-01-26
P&R MEASUREMENT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method based on Newton's second law and sensing technology to obtain vibration acceleration and then convert it into displacement has certain limitations in some dynamic fixture testing, because the vibration of the product and the vibration of the fixture tool cannot use Newton's second law to build a dynamic model

Method used

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  • A Vibration Displacement Test Method Based on Momentum Theorem
  • A Vibration Displacement Test Method Based on Momentum Theorem
  • A Vibration Displacement Test Method Based on Momentum Theorem

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: measure the vibration displacement of a single motor,

[0048] The operator starts one of the channels through the display interface. The piezoelectric force sensor collects the force signal in the motor and transmits the force signal to the data acquisition module. processing, and then carry out signal filtering processing on the force signal through a zero-phase filter;

[0049] Further, the data acquisition module sends the processed force signal to the signal processing algorithm module, and the force signal is converted into a velocity signal through the frequency domain integration algorithm, and then the velocity signal is converted into a displacement signal by the frequency domain integration algorithm again;

[0050] Furthermore, the displacement signal is finally sent to the display interface, which is displayed in front of the operator in the form of sine, square wave, triangle wave, sawtooth wave, multi-frequency fusion, sweep amplitude, sweep...

Embodiment 2

[0051] Embodiment 2: testing multiple channels at the same time,

[0052]The operator starts multiple channels through the display interface, because there are motors, piezoelectric force sensors, data acquisition modules, and data calculation modules in each channel, and the motors, piezoelectric force sensors, and data acquisition modules in each channel , The data calculation modules are not related to each other. The piezoelectric force sensor collects the force signal in the motor and transmits the force signal to the data acquisition module. Perform signal filtering processing on the force signal through a zero-phase filter;

[0053] Further, the data acquisition module sends the processed force signal to the signal processing algorithm module, and the force signal is converted into a velocity signal through the frequency domain integration algorithm, and then the velocity signal is converted into a displacement signal by the frequency domain integration algorithm again;...

Embodiment 3

[0055] Embodiment three: realize the conversion synchronization of digital-analog and analog-output,

[0056] The operator clicks the button on the display interface, and the display interface starts the data calculation module. The operator inputs different vertical values ​​into the display square box on the display interface, and then the calculation can be performed through the data calculation module, and the results are converted into sine, square wave, Triangular wave, sawtooth wave, multi-frequency fusion, amplitude sweep, frequency sweep, combined signal and any customized signal output form are displayed in front of the operator.

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Abstract

The application discloses a vibration displacement test method based on the momentum theorem, the method includes: establishing a data acquisition module; establishing a signal processing algorithm module; preparing a test motor; establishing a software display interface; preparing an electric pressure sensor; establishing a data storage server. The embodiment of the invention provides a vibration displacement test method based on the momentum theorem. On the basis of the contact sensor measurement technology and the momentum theorem, on the basis of the modularized data acquisition equipment and the frequency domain integration method algorithm, a general-purpose product vibration displacement test method is proposed. The displacement measurement algorithm not only reduces the calculation process and saves computer resources, but is also suitable for automated test production lines.

Description

technical field [0001] The embodiments of the present application relate to the field of motor vibration displacement measurement methods, in particular to a vibration displacement measurement method based on the momentum theorem. Background technique [0002] With the continuous growth of the consumer electronics industry, the vibration displacement of products deserves more and more attention. Often, the displacement that a product can reach directly reflects its vibration capability. Commonly used sensor methods for testing displacement include: vibration displacement strain sensor, inductive sensor, differential transformer sensor, eddy current sensor, Hall sensor, inductive synchronizer, grating, capacitive grid, magnetic grid, etc., can be used for displacement measurement. The traditional method based on Newton's second law and sensing technology to obtain vibration acceleration and then convert it into displacement has certain limitations in some dynamic fixture tes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/02
CPCG01B7/02
Inventor 王磊何吉祥陈科曾令军刘雪
Owner P&R MEASUREMENT INC