1-D impaction strength testing device

Abstract

This invention relates to an one-way impact strength test device used in testing the impact strength of vertical falling of an analog head to the ground including a falling frame of the analog head, an optical control switch set on the falling frame of the head, an acceleration sensor and a shading baffle set on the head and a test host, in which, when said shading baffle passes through the optical control switch, it triggers the switch and generates twice interrupt signals, the acceleration sensor tests the acceleration of the head when impacting the ground and transmits it to the host, which samples and keeps acceleration data and computes the peak value of the acceleration and the HIC value and times the time difference of the two interrupt signals to compute the falling height value of the analog head and store and display the data.

Description

technical field [0001] The invention relates to a one-dimensional impact strength test device, in particular to a test device for measuring the impact strength caused by a vertical impact object to a ground material. Background technique [0002] Thousands of people are injured on sports fields every year, and many studies have shown that 60%-70% of sports field injuries are due to falls on the ground or intermediate platforms beneath sports equipment. Another 50% of these injuries are brain injuries. [0003] In fact, there are many materials that can protect the human brain from injury when exercising or playing, but it is necessary to test whether these materials can provide enough cushioning to meet safety requirements before using the materials. Therefore, foreign countries have formulated some standards for testing the safety performance of sports venues, such as ASTM F 1292 in the United States, BSEN1177 in Europe, and so on. These standards give the calculation met...

AI Technical Summary

Problems solved by technology

The test function of this patent basically conforms to the ASTM F 1292-99 standard, but the sampling rate and filter corner frequency of the device are lower than the lower limit specified in the ASTM F 1292-99 standard, which affects its measurement accuracy, and there is no component that can calculate the drop height of each impact

The device uses a three-way sensor to measure the acceleration in three directions during impact. Although it simulates the actual impact situation better, the acceleration in the vertical direction is mainly considered during impact. Measuring three-dimensional acceleration also greatly increases the cost of the device.

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