Dummy chest calibration device

Abstract

The\ invention provides a dummy chest calibration device, which comprises a bracket, a pendulum bob and a dummy mounting platform. The pendulum bob is connected with the bracket via a suspension cord. The bracket is further provided with a lifting mechanism. The lifting mechanism and a release unit are connected. The lifting mechanism comprises a lifting motor and a steel wire rope. The lifting motor is connected with a coiling wheel. One end of the steel wire rope is wound around the coiling wheel. The other end of the steel wire rope is connected with the release unit. The lifting motor is fixed onto the bracket and is also connected with an angle sensor. According to the technical scheme of the calibration device, the lifting motor is connected with the angle sensor, so that the turning number of the coiling wheel can be calculated by the angle sensor. Furthermore, the height of the pendulum bob can be figured out. A test operator only needs to preset the turning number of the coiling wheel that is required to rotate so as to life the pendulum bob to a required height. By means of the release unit, the pendulum bob can be automatically released. In this way, the steps of manual comparison and subsequent adjustment are avoided. The test speed is effectively improved, and the working efficiency is increased.

Description

technical field [0001] The invention relates to the field of test dummy calibration tests, in particular to a test device used for calibration of dummy chests in passive safety tests. Background technique [0002] The crash test belongs to the research scope of passive safety, and its purpose is mainly to test the protection ability of the manned transportation vehicles (such as airplanes, ships, automobiles) to the occupants in the event of accidents (such as airplane collisions, ship grounding, car collisions, etc.) . At present, some foreign research institutes have collected the actual data when the accident occurs by installing the acquisition system on the manned transportation vehicle, and used the artificial simulation test device to reproduce the actual data through the collision test in the laboratory, which is used for inspection and Evaluate the ability of a manned transportation vehicle to protect its occupants. [0003] Due to the danger of crash tests, it is...

AI Technical Summary

Problems solved by technology

This conventional method has several obvious disadvantages: ①This method has relatively high requirements for the test operator, because the method of comparing the height gauge to measure the height of the hammer head is a purely manual operation, which has a lot to do with the operator's measurement habits. There is a big relationship, the height of the comparison is often inconsistent when another person is changed (the highest height gauge height is about 3.2m); ② This method takes a long time to operate each time and is inefficient, because the confirmation of the pendulum height often depends on the test operator first Visually measure and compare with the height gauge after lifting to a close height. There will inevitably be deviations in the visually measured height. After the comparison, it is necessary to fine-tune the height of the pendulum to prolong the adjustment time and reduce the test efficiency; ③Once the height gauge is processed and formed, the height Generally, it is difficult to change, and after a long period of use of the equipment, the friction coefficient and other parameters will definitely change, so after a period of time, there will be a certain deviation between the height of the height gauge and the height required for the actual test, and then it needs to be reprocessed Height gauge, time-consuming and labor-intensive

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