Digital Temperature Measurement System Based on Oscillator

摘要

To solve the conventional temperature measurement system's problems, such as lots of hardware, high cost, poor Anti-interference ability, a new temperature measurement system based on oscillator is designed. This system, which takes negative temperature coefficient thermistors as temperature-sensing and goes through ring oscillator RC, will reflect the change of the temperature to the change of the pulse cycle. Error compensation and then LED display is done through the single-chip microcomputer timing/counter measuring pulse cycle and then processed by the software. The system, using the minimum hardware circuit design, is characterized by its simple circuits, low power consumption, low cost and reliable function. It is especially suitable for all kinds of intelligent household appliances.