Design of Water Temperature Auto Control System Based on DSP
Abstract
In the aspects of this text introduced the design principle of the automatic control in water temperature in canteen in electricity system primarily. Describes the hardware and software modules were provided. That system passes to adopt the data from the electricity canteen water temperature, and compares with the refer input to control the water temperature.
This system adopts 16 bits DSP (Digital signal processor) TMS320F240 as the main device .It has the advantages of calculating speed quickly and processing signal in real time. And it has a lot of outside devices in it. This simplifies the design of the hardware circuit. Because it face to the arithmetic figure control system, it can circulate the complex control system.
DS1820 is used as the conductor of this system. It has higher accuracy and good linearity characteristic in repetition( repetition better than 0.1℃) in ± 0.1 ℃ of diagraph accuracy. It can attain the ± 0.4 ℃ measure accuracy .
The control arithmetic adopts the PID. It can make system had better of faster and smaller super adjust.
Because this system adopts DSP, DS1820 and the arithmetic of PID, it contents the design requests better.
Key Words: Temperature Control TMS320F240 PID Algorithm
