Safety belt tension sensor

Abstract

The invention provides a safety belt tension sensor comprising a main body provided with an upper cover plate. The upper part of the main body is provided with a groove for holding a strain gauge. Themain body is provided therein with a parallel force-bearing rod and a force-bearing rotatable member. The end portion of the parallel force-bearing rod is provided with a positioning hole. The force-bearing rotatable member is locked in the end portion of the parallel force-bearing rod. The force-bearing rotatable member includes a built-in rod, an elastic member and a positioning member. The elastic member is disposed in the built-in rod. The end portion of the elastic member is provided with the positioning member matching the positioning hole. The safety belt tension sensor is not requiredto be fixed to the inner wall of a vehicle so as to be very convenient to install and use. The safety belt tension sensor is simple in overall structure, easy to operate, not liable to be affected byspace and external environment, good in practicability and good in firmness, and satisfies the requirements of automobile crash tests.

Description

technical field [0001] The invention relates to a safety belt tension sensor, in particular to a safety belt tension sensor under an automobile collision test. Background technique [0002] In the car crash test, the measurement of the tension of the seat belt plays a vital role in judging the performance of the car. However, due to the special structure of the seat belt, it is difficult to use the existing force sensor to measure the tension of the seat belt. Take precise measurements. During the car crash test, the data obtained from the tension of the seat belt can be used to judge the possibility of "injury" of the dummy, which is related to the performance and safety of the car. [0003] At present, there are a variety of tension sensors for specific environments on the market. Due to the particularity of seat belts, existing force sensors cannot perform accurate measurements, and the existing force sensors have insufficient collision strength to be used in crash tests...

AI Technical Summary

Problems solved by technology

[0003] At present, there are a variety of tension sensors for specific environments on the market. Due to the particularity of seat belts, existing force sensors cannot perform accurate measurements, and the existing force sensors have insufficient collision strength to be used in crash tests. (existing patent CN201110350440.6 resistance strain tension sensor)

Moreover, the existing seat belt tension sensor has the problems of inconvenient disassembly and assembly of the force rod and the inability of the force rod to rotate passively, which affects the detection effect

When testing the tension of the seat belt, if the two force rods do not rotate with the pull of the seat belt, the measurement accuracy will be greatly reduced

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