A fully automatic water pressure regulating device

Abstract

The utility model discloses a full -automatic water pressure regulating device of pressing, belongs to water pressure regulating technical field, aims at solving traditional manual adjustment in response lag, pressure fluctuation is violent and the problem of causing equipment safety hidden danger, including PCB control panel, the pressure sensor of installation in the outer wall of pipeline, and its output is handled through the signal conditioning circuit of operational amplifier U1A constitution, the weighing sensor of being equipped with the bottom of water storage container, and the output signal is through wheatstone bridge circuit. The integrated ADC conversion chip on the PCB board, its AIN0 / AIN1 channel receives the pressure signal and weighing bridge signal after conditioning respectively, and is transmitted to the main control chip through I2C interface. The EEPROM of storage target pressure value and PID parameter is connected to the main control chip, and the frequency converter drive plunger pump motor is controlled through PWM pin. The target pressure value is input through UART serial port. Independent safety protection circuit is directly connected to two sensor output ends, and the relay is cut off plunger pump power through threshold value comparator trigger, realizes the safety protection of hardware level.

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