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A test method and test system based on earth signal simulation

A technology of signal simulation and testing method, applied in the field of infrared sensors, to achieve the effect of simplifying system testing, meeting performance testing requirements, and simplifying testing operations

Active Publication Date: 2019-03-12
SHANGHAI AEROSPACE CONTROL TECH INST
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  • Abstract
  • Description
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Problems solved by technology

Therefore, according to the test method of the product, there is currently a lack of a simple earth signal simulation method that can efficiently and accurately test the product

Method used

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  • A test method and test system based on earth signal simulation
  • A test method and test system based on earth signal simulation
  • A test method and test system based on earth signal simulation

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Embodiment Construction

[0031] The invention provides a test method based on earth signal simulation, which uses product characteristics to simulate signal generation, and is used for the performance test of a double-cone scanning infrared earth sensor (referred to as IRES). In the present invention, by extracting the introduction position of the earth signal, the earth crossing signal is introduced by an external control method, and input to the infrared earth sensor test port, the product outputs data to the external computer through the serial port, and the external computer obtains the attitude of the product through attitude calculation Measurement data.

[0032] The working principle of the double-cone scanning infrared earth sensor is based on the sensitivity to the difference in infrared radiation between the earth and the space background. It uses an optical scanning motor and a specially designed optical system to perform a double-cone optical scan on the earth. Relative sensor reference pu...

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Abstract

The invention relates to a test method and a test system based on earth signal analog. A kinematic calculation controller calculates a cross angle calculated value of an infrared earth sensor according to the current satellite attitude and outputs a time value corresponding to the cross angle calculated value; a simple earth signal device receives the time value output by the kinematic calculation controller and reference pulse and a counting frequency signal which are extracted from the infrared earth sensor to generate an earth analog signal; the infrared earth sensor receives the earth analog signal, performs earth signal detection and reads and outputs cross angle information; an external computer receives the cross angle information output by the infrared earth sensor to perform attitude calculation and acquires an attitude measured value of the infrared earth sensor. Product tests are performed in an electric signal generation analog manner, and high efficiency and accuracy of tests on the double-cone scanning type infrared earth sensor product are guaranteed.

Description

technical field [0001] The invention relates to the technical field of infrared sensors, in particular to a simple test method and test system based on earth signal simulation. Background technique [0002] As a supporting stand-alone of the satellite attitude control system, the infrared earth sensor can realize the measurement of the satellite's rolling and pitching attitude signals relative to the local vertical line in orbit, and is used for the capture of the earth when the satellite initially enters orbit and the measurement of the satellite during steady-state operation. gesture control. The infrared earth sensor conducts double-cone optical scanning of the earth's infrared horizon circle through the optical scanning system to obtain the horizon radiation signal, and obtains the earth square wave signal through the photoelectric conversion of the thermal detector. [0003] At present, during the product testing of infrared earth sensors, the light path signal is obta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 陈秀梅吴敬玉钟超张艳召陈为伟
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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