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MATRIX FORCE SENSING RESISTOR 16X16
|Matrix FSR circuits are usually composed of rows and columns intersecting.As this FSR, 16 circuit trace and 16 columns of circuit trace can form 256 intersection points, and each intersection point is a sensor point. In this way, a pressure distribution map covering 256 sensor points can be made.The 16 rows and 16 columns of circuit trace converge at the cable tail and connect to a 32 Pins connector.When the pressure is applied to the sensor area containing 256 sensor points, the force on each sensor point may be different, so the corresponding output voltage will be different.According to the characteristics of FSR, the sensor point applied with a larger force has a lower resistance and the output voltage is higher, and vice versa.By collecting the output voltage data through different sensor points and comparing them, the data collector can calculate where the points is under force and the distribution of the force. This is why we usually call this kind of sensor as a pressure map.|
|Matrix FSR 16*16（FE273）||Matrix force sensor|
|To measure continuously changing force, or use several sensors to measure pressure distribution at different locations|
Features and Benefits ：
|Force measure range||200G ~ 50KG|
|Force repeatable （part to part）||±20%|
|Response time||<1 ms|
|Life time||>2 million|
|This sensor is distributed in 16 rows and 16 arrays, with a total of 256 pressure collection points.The reserved interfaces are two 16Pin FPC connector (FPC_1 & FPC_2) spaced 1.0mm apart.Following figure is sample scheme for reference . Users can adjust the scheme according to the actual usage.|
FSR connector “FPC_1” is connected to ch_1 to 16 of the channel switch chip, FSR connector “FPC_2” is connected to rm_1-16 (the selection of RM resistance value can be determined according to the actual use of customer.Voltage on partial resistance (RM) end is measured through 16 ADC channels of the MCU.When start to test all the channel switch are closed, and then open the channel 1(CH_1), MCU collects the voltage value of ADC_1 to 16 , pressure value of RFSR_1 to 16(which are the first row RFSR) can be obtained by formula calculation.Then close CH_1 and open CH_2,MCU collect ADC_1 to 16 again,then obtain the force value of 2nd row RFSR(17-32). Continue in this way,the ch_1-16 channel switching chip and the ADC channel switching MCU can complete the overall scanning of 256 pressure collection points.At last ,surface force on pressure sensor can be obtained through data analysis.
The display also can show which areas of the sensor are being applied and which are not.Further you can see which parts of the area applied have a larger force, which parts have a medium force, and which parts have a smaller force. For the movement and changing of force, the sensor is very sensitive.
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