The plantar pressure plate is mainly composed of a pressure sensor matrix and a computer data analysis system. The pressure sensor is used to collect the pressure distribution of various parts of the sole of the foot when the person stands still or walks on the pressure plate, and the software is used to analyze the arch shape and gait characteristics to determine whether it is flat foot.
The specific principle process is as follows:
- Collect data first.
The tester stands still or walks barefoot on the plantar pressure plate, and the sensor matrix under the pressure plate records the force conditions of different parts of the sole in real time, including the size of the pressure, the area of contact of the sole, and the trajectory of the center of gravity.
- The computer software converts the collected data into a plantar pressure distribution map, for example, different colors represent different pressure values.
- Analyze the arch of the foot.
If it is flat foot, the contact area of the midfoot area will be relatively large, and almost the entire foot is in contact with the ground.
The calculation formula of Arch Index (AI) is AI=pressure in the midfoot area/total plantar pressure.
Judgment criteria:
Normal arch: 0.21 – 0.28;
Mild flat feet: 0.28 – 0.32;
Severe flat feet: > 0.32.
Applicable population:
- Schools conduct foot screening, evaluate children and adolescents, judge the development of arches, and intervene early if there are abnormalities.
- Athletes optimize gait adjustment.
- People who stand for a long time, such as medical staff, teachers, etc., mainly to prevent foot fatigue.
