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| 一种基于微型压力传感器的气压高度计设计 | |
| 引用本文： | 郭奇,周兆英,熊威,刘绍鹏. 一种基于微型压力传感器的气压高度计设计[J]. 纳米技术与精密工程, 2012, 10(4): 337-341 |
| 作者姓名： | 郭奇 周兆英 熊威 刘绍鹏 |
| 作者单位： | 1. 清华大学精密仪器与机械学系,北京100084;北京航空工程技术研究中心,北京100076 2. 清华大学精密仪器与机械学系,北京,100084 3. 清华大学核能与新能源技术研究院,北京,100084 |
| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目 |
| 摘 要： | 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5V,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. |
| 关 键 词： | 气压高度计 微型压力传感器 GPS辅助 |
Design of a Barometric Altimeter Based on a Micro Pressure Sensor |
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| GUO Qi , ZHOU Zhao-ying , XIONG Wei , LIU Shao-peng. Design of a Barometric Altimeter Based on a Micro Pressure Sensor[J]. Nanotechnology and Precision Engineering, 2012, 10(4): 337-341 | |
| Authors: | GUO Qi ZHOU Zhao-ying XIONG Wei LIU Shao-peng |
| Affiliation: | 1(1.Department of Precision Instruments and Mechanology,Tsinghua University,Beijing 100084,China;2.Beijing Aeronautical Technology Research Centre,Beijing 100076,China;3.Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China) |
| Abstract: | A barometric altimeter is developed based on a micro absolute pressure sensor and the altitude-pressure equation.The circuit for the altimeter contains a constant current source,a special conditioning circuit,a low-pass filter,and an A/D converting chip.Its performance characteristics are tested.The whole device weighs less than 7 g,the operating voltage is 5 V,and the operating current is less than 10 mA.The altimeter can operate at the altitude of-50 m—600 m,with a resolution of about 0.5 m.Temperature drift and pressure variation cause errors in altitude measurement.Therefore,a GPS-aid method is designed to correct these errors.The flight test has also been completed,which shows that the altimeter can meet the requirements of MAVs. |
| Keywords: | barometric altimeter micro pressure sensor GPS-aid |
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