基于AT90S8535单片机的新型呼吸频率检测计的设计

Design of new breathing rate detector based on AT90S8535 microcontroller

随着各种高传染性疾病的出现,在对感染人群进行呼吸频率检测时,应尽量避免医务人员与受感染群体接触的次数。因此,根据温度传感器的原理,提出了一种基于AT90S8535单片机的无线传输的呼吸频率检测计的设计方案。利用热敏电阻设计了一种硬件接口电路,通过电桥检测每次呼出气体的热量。并且采用无线传输方式将温度信息传送给接收装置,通过单片机处理,检测出呼吸频率,并用LCD显示。无线传输采用了二次发射方式,用以提高传输距离。实现了对病人呼吸频率的远程实时监测,具有较大的应用价值。

As the appearing highly infectious diseases, we must re- duce the times of contacting with the infected people when detecting the breathing rate of the infected people. So in the paper we intro- duced a design proposal of wireless transmitting breathing rate detec- tor based on AT90S8535 microcontroller in accordance with the princi- ples of temperature sensor, we designed a hardware interface circuit using a thermistor, and detected the heat of expiratory air by electric bridge, it transmits the information of temperature to the receiving de- vice in wireless way, and by the microcontroller processing, we could get the breathing rate, and display it with LCD. Using the way of sec- ondary emission increases the transmission distance. It can realize the real time temperature remote monitoring. It has the bigger application value.