Water temperature data acquiring and controlling system based on statistical process control (SPC) single chip microcomputer

A water temperature data acquiring and controlling system based on a statistical process control (SPC) single chip microcomputer mainly solves the problem that an existing water temperature controlling system of a heating power company is hysteretic in control and is not ideal in control effect, and is characterized by further comprising a plurality of PT100 temperature sensors, a signal amplifying and conditioning circuit, a universal serial bus (USB) interface circuit, an upper computer and a relay for controlling an electric heater. The signal outputting ends of the PT100 temperature sensors are connected to the signal inputting end of the signal amplifying and conditioning circuit, and the signal outputting end of the signal amplifying and conditioning circuit is connected with the corresponding sampled signal inputting end of the single chip microcomputer. The upper computer is connected with the single chip microcomputer through the USB interface circuit in a both-way data stream mode. The temperature control signal outputting end of the single chip microcomputer is connected to the on-off control signal inputting end of the relay. The water temperature data acquiring and controlling system utilizes the SPC single chip microcomputer to achieve a proportion integration differentiation (PID) control scheme, thereby avoiding control hysteresis and reducing the manufacture cost.