关键词:仪表;温、湿度;单片机
The design of temperature and humidity instrument
Abstract
Everyone knows that the temperature of the air is a physical quantity.It is easy to measure.The humidity of the air is also a very important physical quantity .But it is more difficult to measure . The common humidity sensor often needs a lot of complicated circuits to be designed. It is generally hard to measure the precision (often under +3%RH ), meanwhile, the changes between the precision and temperature have a complicated influence relation. If the humidity sensor required to work under the high wet environment and high temperature for a long time,we must use one-chip computer to examine it.
Key words: temperature and humidity;instrument;MCU