Quartz pendulum accelerometer long-term stability test tool and test method

Abstract

The invention relates to a quartz accelerometer long-term stability test tool and a test method. The tool comprises a base and a test transition plate. A base fixing surface at one end of the base isin contact with and fixedly connected with a working surface of a test dividing head or a servo turntable special for the accelerometer; the upper end surface of the base is a transition plate mounting surface, two positioning pin holes are formed in the upper end surface, a positioning pin is vertically and fixedly mounted on each positioning pin, and threaded holes are formed in parts, close toeach edge, of the upper end surface of the base; a plurality of accelerometer mounting positions are uniformly distributed on the test transition plate, and a circular pin hole and a long circular pinhole are formed in the test transition plate; screw mounting holes are further formed in the test transition plate; and the test transition plate is arranged at the upper end of the base, the upper half sections of the two positioning pins are matched with the two pin holes in an inserted and positioned mode respectively, the screw mounting holes in the test transition plate are aligned with thethreaded holes in the base one to one, and fastening screws are installed, so that the test transition plate is fixedly connected with the base. According to the invention, measurement of multiple batches of accelerometers is realized, and the equipment utilization rate is improved.

Description

technical field [0001] The invention belongs to the technical field of accelerometer testing, and in particular relates to a long-term stability testing tool and a testing method for a quartz pendulum accelerometer. Background technique [0002] Quartz pendulum accelerometer is a mechanical pendulum accelerometer with quartz pendulum as the core sensitive element, which is used to measure the linear motion information of the moving carrier. It is one of the two core components of the inertial navigation system, and its accuracy and performance are very high. To a certain extent, it determines the accuracy and performance of the inertial navigation system. Especially for inertial navigation systems that work continuously for a long time, the navigation error caused by the accelerometer error is accumulated over time. In order to further improve the accuracy and long-term navigation capability of the inertial navigation system, the long-term stability of the accelerometer must...

AI Technical Summary

Problems solved by technology

[0003] High-precision quartz pendulum accelerometers must go through comprehensive tests before leaving the factory, including long-term stability tests. According to different requirements of the system, the test cycle is as short as one month and as long as one year. At this stage, long-term stability The best test method is to install the accelerometer to be tested on the test fixture fixed on the dividing head. In order to ensure that the test accuracy will not be disturbed, the accelerometer body cannot be disassembled and reinstalled during the test period, otherwise it will cause serious problems. Large test error, but limited by the equipment and test system, the number of tests at one time cannot be large, resulting in low utilization of equipment, long test cycle, and high production costs

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