Method and apparatus for keeping low pressure and vibration composite testing vibration table surface center

A technology of vibration center and compound test, which is applied in the direction of vibration test, measuring device, machine/structural component test, etc., can solve the problem that the compound test cannot be carried out normally, and achieve novel and ingenious design concept, highlighting substantive features, and remarkable technology progressive effect

Active Publication Date: 2009-04-15
苏州苏试广博环境可靠性实验室有限公司
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  • Application Information

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Problems solved by technology

In the low air pressure and vibration composite test, since the air pressure in the low air pressure test chamber changes within the range of ≤ 1 atmospheric pressure, the test product, table 2 and moving coil 3 will move upwa

Method used

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  • Method and apparatus for keeping low pressure and vibration composite testing vibration table surface center
  • Method and apparatus for keeping low pressure and vibration composite testing vibration table surface center
  • Method and apparatus for keeping low pressure and vibration composite testing vibration table surface center

Examples

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Example Embodiment

[0037] Example 1: A method and device for maintaining the center position of a vibrating table in a composite test of low air pressure and vertical vibration

[0038] Such as figure 2 As shown in Figure 3, the internal space of the electric vibration table body 1 is designed as a sealed rigid air chamber 4. The vibration center position of the table 2 and the test product 14 on the table 2 in the vertical vibration test is changed from the lower position at the top. The air pressure of the air pressure test box 15 and the rigid air chamber 4 located below are floating in balance to support the air pressure.

[0039] Set an inflation air source whose air pressure is always higher than the air pressure in the rigid air chamber 4 (see Figure 3). The inflatable air source can be understood as an air chamber filled with pressurized air. The compressed air in the air chamber is formed by inflating the air chamber by an inflator. It can also be understood as an inflatable pump whose out...

Example Embodiment

[0051] Example 2: A method and device for maintaining the center position of a vibrating table in a low-pressure and horizontal vibration compound test

[0052] Such as Figure 5 As shown, the difference from Example 1 is: First, the horizontal vibration test needs to add a horizontal sliding table 20. The horizontal sliding table 20 is composed of a sliding table surface 21 and a pedestal 22 that are slidably connected in the horizontal direction. There is technology). The second point is to turn the table body 1 of the electric vibration table by 90 degrees, and then connect the table surface 2 on the electric vibration table body 1 to the sliding table surface 21 of the horizontal sliding table 20, and use the electric vibration table to drive the sliding table surface 21 Perform vibration tests in the horizontal direction. The third point is that the test product 14 is installed on the sliding table surface 21 of the horizontal sliding table 20 and is located in the low-pressur...

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Abstract

A method for keeping center of a vibration table for low air-pressure and vibration combined test and a device thereof relate to the field of mechanics environment test equipment. In the device, the inner space of an electric vibration table is designed to a sealed rigid air chamber, and the table is positioned at a vibration center of a vertical vibration test or horizontal vibration test and is supported by floating balance between the air pressure of a low air-pressure test box arranged on one end of the table and the air pressure of a rigid air chamber arranged on the other end of the table. A measuring device is used for detecting the distance and direction of the table static and dynamic deflection from the theoretical vibration center position, and an aeration passage and two exhausting passages aerate and exhaust the rigid air chamber to keep the table at the vibration center position during the test. The method and the device are applicable to the vertical vibration combined test and the horizontal vibration combined test, the vibration table can be automatically always kept at the vibration center position during the combined test, in particular when the test low air pressure is in aeration state, the vibration table can also be always kept at the vibration center position.

Description

technical field [0001] The invention relates to a composite environment vibration test equipment in the mechanical environment test equipment, in particular to a method for maintaining the center position of a vibrating table in a low air pressure and vibration composite test equipment and a device for realizing the method. The method and device can automatically keep the vibrating table always at the center of the displacement during the compound test, especially when the test low pressure is in a changing state, it can also keep the vibrating table always at the center of the displacement. Background technique [0002] An electrodynamic shaker is a test device that simulates a vibrational environment. The low-pressure test chamber is a test equipment that simulates a low-pressure environment. In the past, due to the limitation of test equipment, the vibration simulation test and low air pressure simulation test of test products (such as electronic components, instruments ...

Claims

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Application Information

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IPC IPC(8): G01M7/02
Inventor 武元桢李平朱雅俐
Owner 苏州苏试广博环境可靠性实验室有限公司
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