基于GPS及气压传感器定位仪的设计

目的在以气压测量集成传感器研制高度计的基础上,设计一款高度与GPS相结合的便携式定位仪,以满足实际应用需求。方法利用气压传感器来解算相应的高度信息,配合上GPS模块传输的经纬度信息实现完整的三维定位。结果该定位仪由GPS模块、气压计模块、单片机模块、电源管理模块、LCD显示模块、矩阵键盘六大部分构成。单片机为主控芯片,GPS接收经纬度信息;气压计通过温度补偿获得高精度的气压信息进而可解算为高度信息;最终通过LCD实时显示;按键实现数据的输入以及显示界面之间的功能跳转;整个系统通过电源管理模块供电,并具有充电功能。结论具有高精度、稳定性、低功耗和便携式特点,可应用于地质勘探、汽车导航或高空作业上。在海拔高度方面,测量范围还有待进一步扩展。

The design of locater based on GPS and barometer

Aim One portable locater is designed to combine the altitude and GPS,which is based on the design of altimeter using integrated sensor measuring atmospheric pressure.Its purpose is to meet the need of actual usage.Methods The barometer is used to calculate the altitude which in turn is combined with the longitude and latitude from the GPS to form a complete 3-D location.Results This locater is composed of six main parts,which is GPS,barometer,SCM,power management module,LCD display module and matrix keyboard.SCM is the main controller.GPS is to get the longitude and latitude information.Via temperature compensation,barometer gets the barometric pressure with high precision,which could be converted to altitude and in turn be displayed via LCD.The press key achieves the goal to input the data and switch over the display interfaces.The power management module supplys power to the whole system and has the function to be charged.Conclusion This locater has the characteristic of high precision,stability,low power consumption and portability.It can be used in geologic prospecting,car navigation or aloft working.