Implementation of Height Measurement System Based on Pressure Sensor BMP085
This paper designs a kind of height measurement system based on BMP085 pressure sensor. One STM32F103RCT6 embedded chip is used as the main controller for the system, meanwhile one BMP085 chip is used to measure pressure data. The microprocessor reads the pressure data through the I2C hardware interface, then adopts linear interpolation method to calculate the absolute height based on the relationship of atmospheric pressure and altitude, thereby acquire the relative height. The experimental result shows that the relative height measurement error of this system is 0.4m, thus can achieve high precision requirement.