论文部分内容阅读
基于微型绝压传感器和高度气压关系式,研制了一种气压高度计.高度计的电路由恒流源、专用处理电路、低通滤波器和模/数转换芯片组成.对高度计的性能参数进行了测试.全系统重量小于7 g,工作电压为5 V,工作电流小于10 mA.高度计可以在-50 m~600 m的高度范围内工作,且分辨力可以达到0.5 m.温度漂移和气压变化会导致高度测量误差,为此设计了一种GPS辅助算法.相应的飞行试验也已完成,结果表明高度计可满足微型飞行器的要求.
Based on the relationship between the micro-absolute pressure sensor and the height-pressure relationship, a barometric altimeter was developed.The circuit of the altimeter consists of a constant current source, a dedicated processing circuit, a low-pass filter and an A / D converter chip.The performance parameters of the altimeter were tested . The total system weight is less than 7 g, the operating voltage is 5 V and the operating current is less than 10 mA. The altimeter can work in the height range of -50 m ~ 600 m with a resolution of 0.5 m. Temperature drift and pressure changes can lead to Height measurement error, a GPS-aided algorithm has been designed for this purpose.The corresponding flight test has also been completed and the results show that the altimeter can meet the requirements of the micro-aircraft.