1、 基于单片机的数字式大气压计的设计 摘要数字式大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。本设计介绍了一种基于气压传感器 MPX4115 的精密数字大气压计系 统的实时显示设备。 该设计主要通过气压传感器 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，得到单位时间内获得的脉冲数，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
2、 Based on single-chip digital pressure gauge design Abstract: Digital barometer is the use of a pressure sensitive element to be tested directly converted to pressure, easy detection, transmission of the current or voltage signal, and then after a follow-up circuit processing and real-time display o
3、f a device. This design introduced one kind based on the pressure sensor MPX4115 precision digital pressure gauge system real time display device. This design mainly through the pressure sensor MPX4115obtained with atmospheric pressure corresponding to the analog voltage value, and through the volta
4、ge / frequency ( V/F ) converting module converts the digital pulse, through the MCU receives the pulse signal, to receive the unit time gaining the pulse number, according to the voltage and frequency of the linear relationship to calculate the corresponding the actual pressure value, the last under the control of single-chip microcomputer is composed of a liquid crystal display circuit displays the actual pressure value. Key words: Single chip microcomputer, Pressure sensor, V/F converter,
