摘 要随着我国经济的不断成长，国家越来越重视气压计项目相关行业的进展，“十二五”期间气压计产业的重点领域与其投资机会研、究成为热点问题。气压计的市场具有很大的吸引力！数字气压计是利用压敏元件将待测气压，直接变换为容易检测、传输的电流或电压信号，然后再经过后续电路处理并进行实时显示的一种设备。气压计被广泛应用于国防领域、工业领域、医疗领域以与我们日常家庭生活中。本设计就介绍了一种基于气压传感器 MPX4115 的精密数字气压计系统的实时显示设备。它通过气压传感器 MPX4115 获得与大气压相对应的模拟电压值,并经过电压/频率(V/F)转换模块转换为数字脉冲,通过单片机接收该脉冲信号，得到单位时间获得的脉冲数，依据电压与频率的线性关系式计算出所对应的实际气压值，最后在单片机的控制下由液晶显示电路显示出实际气压值。关键词：单片机；气压传感器；V/F 转换器；液晶显示AbstractAs China's economy continues to grow, countries pay more and more attention to the barometer project relevant industry development, during 1025 ", "the barometer industry key fields and its investment opportunity study became a hot issue. The barometer of the market has great attraction! Digital barometer is the use of pressure sensitive components will stay for easy measuring pressure directly transform the current detection, transmission or voltage signal, and then after the follow-up circuit processing and real-time display of a kind of equipment. The barometer is widely applied in the defence domain, industrial field, the medical field and in our daily family life. This design is introduced which is based on pressure sensor MPX4115 precision digital barometer of real-time display device. System It through the air pressure sensor MPX4115 was obtained with the atmospheric pressure corresponding simulation voltage values, and through voltage/frequency (V/F) conversion module converted to digital pulse, through the microcontroller receives the pulse signal, receive an...
