Resistance Measuring System of Strain Gauges for Spacecraft
A resistance measurement and strain gauge technology, applied in the field of satellite assembly inspection and testing, to achieve the effect of eliminating the test state, stable pressure, and stable contact conditions
Active Publication Date: 2017-03-29
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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Problems solved by technology
Using the test system of the present invention to carry out the strain gauge resistance test is superior to the original process in terms of test reliability, test efficiency, and protection of the strain gauge. This system overcomes the defects of the existing screening test methods and achieves expectations. Research and development goals can effectively improve the quality of strain gauge screening testing
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[0028] The tool for measuring the free length of the satellite separation switch of the present invention will be further explained below in conjunction with the accompanying drawings. The resistance measurement system of the strain gage for spacecraft of the present invention includes a test board 21, a compression unit group, a left operating rod 17, a right operating rod 20, a support shaft 13, a band switch 32, and a resistance measurement device. The compression unit group on the board is composed of several groups of compression units. Several groups of compression units are fixed on the support shaft. Both sides of the support shaft are supported on the bearing seat. The support shaft passing through the bearing seat has a lock in the middle of one end. Slot 1, the operating rod is fixedly connected to the locking slot 1 through the locking block and can rotate the support shaft with the lifting of the operating rod. A locking slot 2 is also machined above the end of the ...
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The invention discloses a resistance measurement system of strain gages for a spacecraft. The resistance measurement system comprises a test plate, a pressing unit set, operation rods, supporting shafts, a wave band switching switch and a resistance measurement device. The pressing unit set on the test plate is composed of a plurality of sets of pressing units, the pressing units are fixedly arranged on the supporting shafts in a penetrating mode, two sides of the supporting shafts are supported by bearing seats, first locking grooves are formed in the middle portions of one ends of the supporting shafts penetrating through the bearing seats, the operation rods are fixedly connected into the first locking grooves through locking blocks and enable the supporting shafts to rotate along with the ascending and descending of the operation rods, the supporting shafts drive the pressing units on the supporting shafts to ascend and descend, pressing levers are made to drive pressing heads through the supporting shafts to press the strain gages on strain gage seats, and meanwhile lead sheet press blocks are driven to press the leads of the strain gages on elastic contact sheets. The resistance measurement system eliminates the uncertain factors of the pressed state of the strain gages, pressure is stable, the strain gages are pressed uniformly, test reliability is improved, the strain gage protection effect is improved, 10 strain gages are measured at one time, the operation is convenient, and work efficiency is improved.
Description
Technical field [0001] The invention belongs to the technical field of satellite assembly inspection and testing. Specifically, the invention relates to a strain gauge screening test system for spacecraft. Background technique [0002] At present, there are two methods for strain gauge acceptance screening. One is to directly measure the strain gauge in its natural state, and the other is to use a common pressure block to press the strain gauge sensitive grid to measure. [0003] The first method is to carefully observe the appearance of the strain gauges after eliminating the operating problems. It is found that each strain gauge is bent in a different arc when placed naturally. The strain gauges with different bending arcs are naturally curled and uniformly received. When tested under the pressure flat state, the resistance value has a change of ±0.2Ω. The test results prove that the test method has the problem of unstable test results with different environmental conditions. [0...
Claims
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IPC IPC(8): G01R27/02
Inventor 郭洺宇李志明黄垒胡全忠郑丽得张春柳杨帆吴小洲付英莲梁园园
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG