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Method for detecting precision of radio altimetre of helicopter

A radio altimeter and helicopter technology, applied in measurement devices, instruments, etc., can solve problems such as high cost, low detection accuracy, and large workload, and achieve the effect of reducing attitude requirements, reading data conveniently, and improving detection efficiency.

Inactive Publication Date: 2017-01-04
HARBIN
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AI Technical Summary

Problems solved by technology

This method needs to install structural parts on the aircraft to fix the laser range finder, and requires the flight test engineer to record the relevant parameters synchronously, which is a heavy workload; the helicopter needs to be kept relatively stable during the flight, and has high requirements for the weather conditions and the crew; It is a multi-point recording parameter, the test data is not continuous enough, and the detection accuracy is low; the laser range finder has fewer uses, and the separate purchase cost is higher

Method used

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Embodiment Construction

[0012] The technical solution will be described in further detail below.

[0013] The biggest feature of this technical solution is that the flight altitude is obtained by the GPS system installed on the aircraft, and compared with the flight altitude obtained by the radio altimeter on the helicopter, and finally the accuracy of the helicopter radio altimeter is obtained.

[0014] Install a set of GPS and KAM500 equipment on the helicopter (for collecting radio altimeter parameters in the bus data); at the designated test site, a relatively flat ground is required, turn on the GPS and KAM500 equipment, take off vertically from the ground, and reach the radio altimeter. After the altimeter ranges, you can land normally. The whole test process is the vertical take-off and landing of the helicopter.

[0015] The height difference between the GPS antenna and the radio altimeter antenna is recorded as ΔH, and the GPS data is obtained by the difference, and the height H when the he...

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Abstract

The invention relates to a method for detecting the precision of an altimetre, in particular to a method for detecting the precision of a radio altimetre of a helicopter. The method is characterized in that the flight height is obtained through a GPS installed on an airplane and compared with a flight height obtained by the radio altimetre on the helicopter, and finally the precision of the radio altimetre of the helicopter is obtained. According to the method, the GPS high in precision is adopted for continuously collecting the flight height of the airplane, and then the detection precision is improved. Besides, compared with other adopted equipment, the requirement for the posture of the helicopter is lowered, data reading is convenient and accurate, and the detection efficiency is improved.

Description

technical field [0001] The invention relates to a method for detecting the accuracy of an altimeter, in particular to a method for detecting the accuracy of a helicopter radio altimeter. Background technique [0002] In the prior art, when testing the accuracy of the helicopter radio altimeter, a laser range finder is installed on the helicopter. At the same time, the flight test engineer records the readings of the radio altimeter at the corresponding time, adjusts the height of the helicopter, and measures the height of the ground at multiple points. After the flight test is over, compare the readings recorded by the laser rangefinder and the flight test engineer manually to obtain the corresponding accuracy. This method needs to install structural parts on the aircraft to fix the laser range finder, and requires the flight test engineer to record the relevant parameters synchronously, which is a heavy workload; the helicopter needs to be kept relatively stable during the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 史立军陈先云张漫煜张波温洪雷葛新
Owner HARBIN
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