1-D impaction strength testing device

Abstract

The invention discloses a one-dimensional impact strength testing device, which is used for testing the impact strength of a simulated head falling vertically on the ground. Acceleration sensor and shading partition, and test host. When the shading partition is opened by the light control, the light control switch is triggered to generate two interruption signals, and the acceleration sensor measures the acceleration when the simulation head hits the ground and transmits it to the test host. The test host samples and saves the acceleration data, calculates the acceleration peak value and the head injury judgment (HIC) value, and counts the time difference between two interrupt signals to calculate the simulated head drop height value, and saves and displays these data. The one-dimensional impact strength testing device of the present invention has a relatively high sampling rate and filter corner frequency, can accurately measure acceleration data and calculate head injury evaluation values, and accurately calculate the height corresponding to each impact.

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 caused by falling on the ground or intermediate platform below the 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 calculati...

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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