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Handheld modal data acquisition apparatus

It is a data acquisition and handheld technology, which is applied in the direction of measuring devices, simulators, and testing of machine/structural components. It can solve the problems of inconvenient portability, large volume and quality, and achieve easy operation, small overall size and light weight. Effect

Pending Publication Date: 2018-12-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modal data acquisition device is usually realized by using a computer host with a data acquisition card. This device has a large volume and mass, and it is inconvenient to carry even with a notebook computer.

Method used

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  • Handheld modal data acquisition apparatus

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Experimental program
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Effect test

Embodiment Construction

[0010] Such as figure 1 As shown, a handheld modal data acquisition device. 1. Exciting force sensor, 2. Acceleration sensor, 3. Charge amplification module, 4. Amplifying circuit, 5. SD card, 6. LCD screen, 7. Single chip microcomputer.

[0011] The output line of the excitation force sensor 1 is electrically connected to the charge amplification module 3, and the acceleration sensor 2 is fixed on the measured structural member, and its output line is electrically connected to the amplification circuit 4, and the charge amplification module 3 and the amplification circuit 4 are electrically connected to the single-chip microcomputer 7 AD chips. When starting the modal test, the excitation force sensor 1 generates a pulse signal by hammering, and the charge amplification module 3 triggers the single-chip microcomputer 7 to control its AD chip acquisition, and simultaneously collects the response signal of the acceleration sensor 2, and the single-chip microcomputer 7 saves th...

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PUM

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Abstract

The invention discloses a handheld modal data acquisition apparatus. The apparatus controls an AD chip to acquire a trigger of an excitation force sensor and a response signal of an acceleration sensor by a single chip microcomputer, stores data into a SD card, displays the data on a liquid crystal screen in a curved form, and inputs the data on the SD card into a computer for modal software analysis after the data acquisition of all the measuring points is completed. The apparatus is small in size, light in weight, simple and automatic in operate, and is suitable for modal testing of variousstructures.

Description

Technical field: [0001] The invention relates to a mode test device, in particular to a hand-held mode data acquisition device. Background technique: [0002] Modal tests are widely used in many practical engineering structures such as machinery, civil engineering, aviation, and aerospace. Usually, modal tests use hammers to excite vibrations. By collecting excitation force and acceleration response signals, modal analysis software can be used to calculate got the answer. However, the modal data acquisition device is usually implemented by using a computer host with a data acquisition card. This device has a large volume and quality, and it is inconvenient to carry even with a notebook computer. Invention content: [0003] The object of the present invention is to provide a hand-held modality data acquisition device for the deficiencies of the prior art. The device is controlled by a single-chip microcomputer for data acquisition and storage, and is easy to operate. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02G05B19/042
CPCG05B19/042G01M7/02
Inventor 胡长华
Owner BEIJING INSTITUTE OF TECHNOLOGYGY