This paper presents the design concept of a water temperature control system with speech function, focusing on both hardware and software aspects. The control center is based on the AT89C51 microcontroller, which offers powerful functionality to meet the design requirements. The DS18B20 is used as the data acquisition chip, eliminating the need for AD conversion and simplifying the interface with the microcontroller, making programming easier.
What sets this design apart from conventional water temperature control systems is the inclusion of a speech function module, achieved through the ISD4004 speech chip. The ISD chip employs "direct analog storage" patented technology, eliminating the need for analog-to-digital conversion, digital compression, and speech synthesis processes, thereby reducing distortion and significantly enhancing sound storage efficiency compared to previous products.
Due to the limited current output of the microcontroller, the output current passes through MOC optocouplers to control the relay that operates the motor, thus regulating the water pump for temperature control. This system allows for various functions such as setting temperature, speech prompts, temperature control, and alarm notifications for temperature exceedances.
Overall, this water temperature control system with speech function integrates advanced technology in a compact and efficient design, showcasing the potential of microcontroller-based systems in enhancing automation and control processes. Keywords: water temperature control, microcontroller, speech function, motor.
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