Testing device of contiguous-wave radio altimeter

A radio altimeter and wireless altimeter technology, applied in measuring devices, instruments, etc., can solve the problems of high experimental cost, rigid testing methods, and few measurable height values, achieving high flexibility, comprehensive testing effects, and reducing complexity. The effect of degree and workload

Inactive Publication Date: 2017-01-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

At present, the conventional detection method of continuous wave radio altimeter is static detection, which simulates the echo delay of the ground according to the propagation delay of the signal in the delay line. This test method is relatively rigid, the measurable height value is less, and the experimental cost is high

Method used

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  • Testing device of contiguous-wave radio altimeter
  • Testing device of contiguous-wave radio altimeter
  • Testing device of contiguous-wave radio altimeter

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Experimental program
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Embodiment

[0040] figure 1 It is the altimeter emission signal and echo signal, and the corresponding instantaneous frequency difference schematic diagram;

[0041] First, briefly describe the working principle of the continuous wave wireless altimeter, the transmitting signal and the echo signal (triangular wave) of the continuous wave wireless altimeter, and the corresponding instantaneous frequency difference such as figure 1 As shown, in one modulation period, the solid line is the altimeter emission signal, the dotted line is the ground echo signal, the frequency deviation (the difference between the maximum and minimum frequency) is Δf, and the modulation period is T M . at t 1 At time, the frequency of the transmitter transmitting signal is f 1 , at t 2 At time, the frequency of the reflected signal received by the receiver from the ground is f 1 , and the frequency of the signal transmitted by the transmitter is f 2 . where t 1 ~t 2 The time period is the round-trip prop...

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Abstract

The invention discloses a testing device of a contiguous-wave radio altimeter. The testing device is characterized in that a simulated altitude is set through upper computer software, a measuring result is displayed through the upper computer software, a delay echo signal consistent with a signal transmitted by the contiguous-wave radio altimeter in waveform feature is reproduced by the coordinated work of a medium-frequency testing echo module and a radio frequency module, an altitude detecting device is used for detect measuring precision, and the testing device is simple and practicable, high in flexibility, comprehensive in detecting effect, and the like; a tester only needs to set the parameters of an upper computer according to needs and correctly connect the altimeter, the testing device and a PC, the testing device can automatically complete a testing task, the testing device is simple to operate and convenient to use, only several simple steps need to be performed, operation complexity and workload of staff are lowered to the maximum extent, and work efficiency is increased.

Description

technical field [0001] The technical field of the automatic detection device of the present invention, more specifically, relates to a continuous wave radio altimeter test device. Background technique [0002] The continuous wave radio altimeter is mainly used for low altitude measurement. It has the advantages of no distance blind zone, low transmission power and high resolution. in military equipment. At present, the conventional detection method of the continuous wave radio altimeter is static detection, which simulates the echo delay of the ground according to the propagation delay of the signal in the delay line. [0003] In this way, the development of a test device can realize the automatic detection of the continuous wave radio altimeter, that is, the test interface can set any height within the range of the altimetry, and the test device can automatically realize the detection of the high performance of the continuous wave radio altimeter; The development of relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 李力黄建国张朋杨怡田书林
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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