一种便携式室内空气质量快速检测仪设计

摘要

设计一种涉及室内甲醛（ HCHO）、氨（ NH3）和苯（ C6 H6）三种有害气体浓度的便携式快速检测仪。该仪器采用新型电化学传感器与基于FPGA的新型高精度信号处理电路得到对应气体的初始浓度值，并结合室内环境气压和温湿度实时监测情况，修正初始浓度值，对浓度超标气体进行声光报警。该仪器具有检测速度快、精度高和携带方便等优点，为大众家庭实时快速检测室内空气质量提供一种简单可靠的方法与手段。%A portable rapid detection instrument for four harmful gases which involve indoor formaldehyde, ammonia and benzene is designed. The instrument is designed with a novel electrochemical sensor to get value of initial concentration of corresponding gas and new type high-precision signal processing circuit based on FPGA. Combine indoor ambient pressure,temperature and humidity conditions,correct value of initial concentration,and the audible and visual alarm begin to work when concentration exceed the standard. The instrument has advantages of fast detection speed,high precision and easy to carry,and provide a simple and reliable method for public to real time and quickly detect indoor air quality.