2-10
2.3.2 Sensor Board
U5
EEPROM
U2
ADC
U4
optical
coupler
I2C
GPIO
Slider
adapter
board
Sensor adapter board
Flexible
Printed
Circuit (FPC)
wire
Film
potentiometer
Rotary
potentiometer
Drive board
Pressure
sensor
Pressure
detection board
Block Diagram of Sensor Board
The sensor board consists of three small boards: a pressure detection board, a
slider adapter board, and a sensor adapter board. Wherein, the pressure sensor is
connected to the pressure detection board, and the signal is converted into a digital
signal by U2 acquisition. U5 is the calibration data of the pressure sensor stored in
EEPROM. U4 is the syringe in-position detection optical coupler. The signal of the
pressure detection board is sent to the monitoring CPU of the drive board after
being converted by the slider adapter board and the sensor adapter board.
The film potentiometer, which is attached to the sensor adapter board, is used to
detect the direction and speed of the motor, and the signal is forwarded to the
monitoring CPU of the drive board through the sensor adapter board. The rotary
potentiometer is used to detect the diameter of the syringe, and the signal is also
forwarded to the monitoring CPU of the drive board through the sensor adapter
board.
Key test points of the pressure detection board:
TP5 VDD 3.3V
TP3 Signal of the syringe in-position detection optical coupler.
TP8 I2C SCL signal for pressure detection
TP9 I2C SDA signal for pressure detection
Key test points of the sensor adapter board:
TP9 VDD 3.3V
TP7 Output signal of long potentiometer
TP4 Output signal of rotary potentiometer
Содержание BeneFusion SP3
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