Pressure height measurement method based on GPS (global positioning system) correction

Abstract

The invention relates to the technical field of sensor optimization correction, and provides a pressure height measurement method based on GPS (global positioning system) correction. The method includes the steps: regularly acquiring current GPS relative height values and pressure values of an unmanned aerial vehicle; fitting a function of the pressure and the relative height by a least square method; acquiring a corrected current height value by reading a pressure value. The invention further provides a computer program with the method, an information processing terminal and a computer readable storage medium. The method is universally applicable to a height measurement system of the unmanned aerial vehicle and particularly applicable to a small unmanned aerial vehicle platform which is inconveniently provided with a large sensor, the method is effective and has important practical significance for measurement of the height of the unmanned aerial vehicle, wide application prospects and a certain guide effect on development of a new height measurement method.

Description

technical field [0001] The invention relates to the technical field of sensor optimization correction, in particular to a method for measuring barometric altitude based on GPS correction. Background technique [0002] During the flight process of UAV, the collection of height data is very important, especially in the process of take-off and landing, the measurement of height data is closely related to flight safety. At present, the means of altitude measurement for small UAVs are mainly barometric altitude sensors and GPS altitude sensors. [0003] As a sensor that uses changes in air pressure to measure altitude, it is not affected by obstacles during the measurement process. It has a wide range of measurement altitude and is easy to move. It can measure absolute altitude and relative altitude. However, it can be measured by air pressure and The error of calculating the height by temperature is relatively large, especially when measuring near the ground, the accuracy of th...

AI Technical Summary

Problems solved by technology

This method has high measurement accuracy, but due to its own positioning principle, it has problems such as slow update of measurement data, and the sensor is easily blocked by obstacles, which makes the sensor unusable. Moreover, when the satellite receiving condition is not good, the height measurement value is prone to jump. Change the problem

[0005] At present, the fusion correction of barometric altitude sensor and GPS altitude sensor mainly relies on the selection of different sensor data in stages or the use of complementary filtering, Kalman filtering and other methods. Although these methods have better altimetry effects, accurate GPS altitude must be obtained in real time. information and barometric altitude information, therefore, it is of great practical significance to study the fusion technology of barometric altitude sensor and GPS altitude sensor

Images