Wearable FSR Sensor: Flexible Gait Analysis Piezoresistive insole force sensitive resistor
|This type of product is used in the insole, to measure the pressure distribution and dynamic changes of on the insole. This product has a total of 12 sensing points, evenly distributed in the contact position between the foot and the insole, can collect the force applied positions and pressure changes information when user walking, running, jumping.|
|Insole FSR-12||Multipoint / Matrix force sensor (optional)|
Features and Benefits ：
|Sensor size(single point sensor)||20.5*11mm|
|Sensor size(sinSensor quantity||12|
|Force measure range(single point sensor)||50G ~ 20KG|
|Force measure range(1 piece insole sensor)||10KG~100KG|
|Force repeatable （part to part）||±10%|
|Response time||<1 ms|
|Life time||2 million|
|Connector||Female 2.54mm / Male pins 2.54 / FPC 2.54 or 1.0mm|
|ntegration and usage methods：|
|The Foot Pressure Sensor is a matrix pressure sensor that can be interpreted as a 3 row by 4 column matrix circuit design with a total of 12 sensor points . There are two circuits layer on the structure, the upper circuit layer connector has 3PINs, the lower circuit layer connector has 4PINs.|
Usually when integrate the insole to PCB, the three PINs of the upper circuit can be connected to the channel switch chip, an RM is connected in series on each PIN, and connect to GND. The four pins of the lower circuit are connected to the ADC1~4 (as shown in the figure below). At the beginning of the operation, the switch channel chip will turn on the power channel CH1~CH3 in turn, and the MCU will collect the voltage on ADC1~ADC4 in turn, By compare and calculate the data from ADC, and obtain the distribution information of the pressure weight at all the sensor points.
Tips:The order of collecting voltage is as followed.CH1 is open(at same time CH2&3 are closed),MCU collect the voltage from ADC1 to ADC4,these voltages are form Sensor point 1~4#,then close CH1 and open CH2,MCU collect the voltage from ADC1 to ADC4,these voltages are form Sensor point 5~8#,then close CH2 and open CH3,MCU collect the voltage from ADC1 to ADC4,these voltages are form Sensor point 9~12#.
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