Assessment of sole comfort and pressure testing method has many kinds. The one aspect is not previously have in-depth study of shoes, is aging especially repeated pressure caused by sole aging. The heel strikes the ground, as well as the wearer's weight on the heel part, caused by different pressure effects, in the laboratory, these never completely copied.

France testing agencies CTC now has a special test, can fill the void, test, they use their own R & D machine, can measure of sports shoes ( shoes, hiking shoes, basketball shoes, men's shoes, women's shoes and daily ). The purpose is to copy the rear part of the sole pressure, i.e., walking or running process of repeated impact caused by pressure. Results according to the use of the types and status displays ( walking or running in a certain length of the distance and so on ), so, immediate results can be used in production of producers and consumers.

The test principle

Shoes inside a hinged shoe, with a hammer to simulate walking or running in the loop 200000 times under the pressure of the pressure generated by the. The end of the test, a value representing the heel degradation degradation, to what extent.

In order to fully describe walking or running mobile state, it is difficult to. However, the test principle is downward pressure to pressure according to the shoe heel, the testing process is different, repetitive frequency is also different. Testing involved in several biomechanical problems:

In 1, pressure from the calcaneus ( heel bone ) most outside the 35mm office, through the tibia talus on applied to. Hammer accurately from the last 35mm fall behind.

In 2, the pressure must be applied to the heel of the foot ( feet hit the ground parts). Each hammer set below a small piece of metal, were tested on the shoes with tribal.

3, the use of walking and running signal must be capable of reproducing these behaviors. Walking in CTC using 700N, maximum pressure, the frequency of 1Hz. Running, maximum pressure increased to 3000N, and the frequency increased to 2.6Hz. These values correspond to reality of biomechanical data.

Test equipment

The machine is very simple, there are two independent hydraulic hammer, hydraulic pump and a thermostat controlled cooling system. There is a front control panel control device, and a pressure sensor to measure. Software tests by sole ( walking shoes, running shoes, and so on ) to choose the number of circulating, and the signal is transmitted to the hammer. Can independent testing of two different shoes, because of the pressure and frequency can be individually programmed, application in different hammer and shoes. Equipment can be used in 37 to 43 in shoes, shoes can be quickly and easily mounted on the hammer, so it is easy to copy and duplicate test.

Hammer structure is special, shoes and shoe last fall, will return to the starting point, to ensure that each blow. It and the last joint accurately from heel to 35mm, so that application of pressure is consistent with the human foot mobile facts, and tibial stress was on 35mm from the talus. Hammer are arranged at the tail end of the gasket, prevent the shoes to the side slip. After 200000 cycles are degraded value, according to the machine settings for walking or running condition different, given different values:

In 1, foot pressure setting the minimum value is 50N, the maximum value is 700N, the frequency is 1Hz ( 200000 cycles to spend more than 55 hours. )

In 2, running pressure setting the minimum value is 50N, the maximum value is 3000N, the frequency is 2.6Hz ( 200000 cycles now spend only a little over 21 hours time. )

Result

Degradation of value is calculated according to the heel in compression during the minimum pressure of. And the end of the test and the test at the beginning of the minimum material pressure echoes. Reference values from tenth circular strike began, because of the preceding cycle easy error.

Equipment for the establishment of the comfort and durability of the new standards provide a method. Premature broken heel often means that quality and aging problems. The factors also affect the comfort of the rear of the shoe, because it has a great influence on the stability of.