2-8
clocking for the RTC module of the main control CPU. U19 is an RS232 level
conversion chip, and the external communication interface and the nurse call signal
are all connected to the multi-function interface J8. The main control CPU
communicates with the monitoring CPU through UART.
Key and LCD I/O
multiplex interface
Speaker
Alarm lamp
CPU of main
control
STM32F103RG
Wi-Fi serial port/
communication
interface
EEPROM
Flash
RS-232 communication
On/Off control
Motor power control
Monitoring CPU serial
port communication
RTC
Nurse call
Block Diagram of Main Control Module
Test points for key signals:
TP56 UART signal sent by the main control CPU to the monitoring CPU
TP11 UART signal received by the main control CPU from the monitoring CPU
TP5 UART signal sent by main control CPU through an external serial port
TP10 UART signal received by main control CPU through an external serial port
TP19 Reset signal of the main control CPU
TP4 Nurse call control signal
TP75 and TP76 PWM modulation input signal
TP77 Enable signal of voice chip
The monitoring module is composed of a monitoring CPU, a stepper motor drive
circuit, a long potentiometer detection circuit, a pressure detection circuit, a syringe
specification detection circuit, and a syringe in-position detection circuit. The
monitoring CPU adopts STM32F030C8T6 (U15), and the stepper motor drive circuit
uses a motor control chip A4982 (U2). By detecting the input signal of the long
potentiometer, the monitoring module judges the direction and rotation speed of the
motor, and realizes the emptying detection at the same time. The syringe in-position
detection circuit is implemented by an optical coupler circuit in the flap in-position
Содержание BeneFusion SP3
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