A Method of Measuring Barometric Altitude Based on GPS Correction

Abstract

The invention relates to the technical field of sensor optimization and correction, and provides a method for measuring barometric altitude based on GPS correction. The method regularly collects the current GPS relative altitude value and pressure value of the drone, and uses the least square method to fit the pressure and relative altitude. A function that reads the pressure value to get the corrected current altitude value. The present invention also provides a computer program including the above method, an information processing terminal and a computer storage medium. The method of the present invention is generally applicable to the height measurement system of the unmanned aerial vehicle, especially the small unmanned aerial vehicle platform that is inconvenient to install the large-volume sensor, and the method is extremely effective; It has a certain guiding effect on the development of new methods of height measurement.

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 of the UAV, the collection of altitude data is very important, especially during the take-off and landing process, the measurement of altitude 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 t...

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 very good, the height measurement value is prone to jump. change 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

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