High-precision wind measurement system and method based on inertia compensation

Abstract

The invention discloses a high-precision wind measurement system and method based on inertia compensation, and belongs to the technical field of meteorological detection. The system comprises a sonde, a non-expansion cone angle balloon, a ground wireless data receiving device and a high-precision wind measurement information processing system. The wind measurement precision and the wind measurement spatial resolution are improved based on the inertia compensation and filtering principle, the length of a suspension wire is shortened, the swing period of the sonde is measured in real time through attitude information of an inertia module, targeted filtering is conducted on wind measurement data of the period, the influence of swing of the sonde is filtered out in real time, and the real-time performance and precision of wind measurement are improved; the error caused by airflow disturbance is reduced through rectification of the non-expansion sounding balloon with a taper angle on the surface; the detonation module controls the sounding balloon to detonate and fall. A super capacitor charging and discharging mode is adopted, a low-power battery generates high-power current output, initiating explosive devices are reliably detonated, the detonation height is accurately controlled, and the airspace safety is guaranteed. The system and method have the advantages of high wind measurement precision, high efficiency and high safety.

Description

technical field [0001] The invention relates to a high-precision safe wind measurement system and method, belonging to the technical field of meteorological detection. Background technique [0002] With the development of society, there are more and more application scenarios for wind measurement, and there are various wind measurement methods. Common wind measurement schemes mainly include passive and active measurements. Passive measurements are often mechanical measurements, such as common pitot tubes, wind cup anemometers, and optical theodolites. The most common active measurements are laser wind radar, wind profiler radar, Doppler sodar, radiosonde and so on. At present, among various high-altitude wind measuring instruments, the radiosonde is the most important instrument, which can meet the wind measurement requirements at an altitude of 20 to 30 kilometers when carried by a sounding balloon, and has high precision. The radiosonde equipped with a positioning module...

AI Technical Summary

Problems solved by technology

[0003] At present, the radiosonde mounted on the radiosonde balloon relies on the Global Positioning System (Global Positioning System, GPS) or the Beidou / GPS mixed positioning mode to measure the wind speed and direction, and directly processes the wind measurement data of the radiosonde without other compensation links. Limited by the accuracy of the positioning module

The suspension wire between the balloon and the radiosonde is often tens of meters long. During the ascent of the balloon, the suspension wire causes the radiosonde to sway, and the swaying causes errors in the positioning of the radiosonde, which affects the measurement of wind speed and direction.

Even if the radiosonde swing is modeled and analyzed, and the wind speed and direction data are multi-point filtered in proportion to the swing period, because the swing period is too long, the time interval of the effective data of the filtered radiosonde is still too long, thereby reducing the detection accuracy. Accuracy and Spatial Resolution of Airborne Wind Measuring

The actual operation of filtering the influence of the swing on the wind measurement data of the radiosonde is often carried out on the ground. The filter is used to filter all the wind measurement data of the radiosonde, and the swing within a certain bandwidth is filtered out, which reduces the accuracy of the wind measurement. Poor real-time performance

The shape of common sounding balloons is mostly circular, which will cause local airflow disturbances at high altitudes, causing the movement trajectory of the sounding balloon to be in a zigzag shape, resulting in position errors, thus affecting the accuracy of wind measurement

At present, the data sampling rate of mainstream radiosondes for wind measurement is low, and the sampling period is 1 second, so the spatial resolution is difficult to meet the high-precision requirements

In addition, common sounding balloons are made of natural rubber latex or neoprene latex material. This material is characterized by high elasticity and flexibility. The balloon of this material will gradually expand as the height increases. Only when the balloon reaches a certain height, The balloon will burst due to expansion. Due to the different quality of the balloon, the explosion height of the balloon is difficult to control, and sometimes it cannot even explode, which affects the launch flight test of spacecraft and weapons.

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