【作者】 刘歌群； 刘卫国； 卢京潮；

【Author】 Liu Ge qun Liu Wei guo Lu Jing chao(Automation College, Northwestern Polytechnic University, Xi’an 710072, China)

【机构】 西北工业大学自动化学院；

【摘要】 针对某型民用摄像无人机的高度测量问题,提出了利用GPS校准、带温度补偿的气压高度测量方法。设计了基于热敏电阻的气温测量电路,通过试验获得了热敏电阻的材料常数和气温测量计算公式。设计了基于压阻式传感器的气压测量电路,基于试验数据利用最小二乘法进行曲线拟合,获得了气压测量计算公式。给出了气压测量滤波器的形式及其使用效果。本方法使所测得的气压高度尽可能地接近真实高度,所设计的高度测量通道分辨率达到12米,满足了无人机遥测和飞行控制对高度测量的要求。更多还原

【Abstract】 The method to measure the barometric height for UAV(Unmanned Aerial Vehicle) is proposed,in which the barometric height is calibrated by GPS(Global Position System) height and is compensated by atmosphere temperature. The atmosphere temperature measurement circuit is designed based on thermistor whose material constant is worked out from experiment data and the temperature measurement expression is gotten accordingly. The atmosphere pressure measurement circuit using piezoresistive pressure sensor is designed, and the pressure measurement expression is obtained by curve fitting into the measured data using least square method. The form and effect of the digital filter for the pressure measurement is given. The method introduced here makes the barometric height as close to real height as possible with resolution high to 12m and satisfies the requirements of UAV height measurement for remote sensing and flight control.更多还原