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Automatic testing device and automatic testing method of ARINC 429 bus signal performance parameters

An automatic test device and bus signal technology, which is applied in the direction of functional inspection and detection of faulty computer hardware, etc., can solve the problems that there is no automatic test method for signals, so as to reduce development expenses and maintenance costs, reduce maintenance costs, and improve Effects of Level and Ability

Inactive Publication Date: 2013-04-03
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the field of automatic test technology of avionics products, the test methods for the signal interface of ARINC429 bus (Digital Information Transmission System DITS) are mostly limited to the function test of the signal interface, and there is no automatic test method for the performance parameters of the signal itself

Method used

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  • Automatic testing device and automatic testing method of ARINC 429 bus signal performance parameters
  • Automatic testing device and automatic testing method of ARINC 429 bus signal performance parameters
  • Automatic testing device and automatic testing method of ARINC 429 bus signal performance parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] ARINC429 bus signal performance automatic test device, including two parts of the test unit and test adapter, as well as the corresponding software program, has completed the test joint test verification with the tested module-ARINC429 bus interface module, the detailed design description is as follows.

[0031] like figure 1 As shown, the schematic diagram of the working principle of the automatic test device for ARINC429 bus signal performance. Each resource module in the test unit runs the test program of the test unit under the control of the PXI control computer through the PXI bus to realize the automation of the entire test process.

[0032] The configuration and composition of the test unit:

[0033] The test unit is composed of PXI test chassis, signal conditioning box, test interface array and input and output devices (keyboard, mouse, monitor, etc.). The signal conditioning box distributes the signals of the PXI test resource modules to the test interface ar...

Embodiment 2

[0041] The Test Method of Electrical Performance Parameters of ARINC429 Bus Signal

[0042] The measurement of the signal is mainly completed by the software-controlled digital oscilloscope module, the matrix switch module and the ARINC429 bus simulation module, and the required excitation signal is generated by the arbitrary waveform generator module.

[0043] a) Prepare test items and parameter configuration tables: define test items, test parameters, signal codes, test resource channels and other test information, generate test signal / resource configuration tables and code information databases, and determine test items such as electrical parameters of ARINC429 bus signals;

[0044] b) start the digital oscilloscope module process in the PXI chassis to monitor and set the trigger level of the digital oscilloscope module;

[0045] c) After the handshake is successful, the module under test sends data, and a certain level appears on the bus;

[0046] d) The digital oscillosc...

Embodiment 3

[0048] Signal Amplitude Test Method

[0049] The test of signal amplitude mainly completes the measurement of signal high level and low level. The amplitude range of the output signal should meet the requirements listed in Table 1.

[0050] Table 1 Output Amplitude Test Requirements

[0051] serial number

[0052] Use the Peak method to calculate the signal amplitude. The specific method is: traverse all the sampling points of a frame bus signal, and compare the points with the highest and lowest values, which are the highest and lowest amplitudes of the signal.

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Abstract

The invention discloses an automatic testing device and an automatic testing method of ARINC 429 bus signal performance parameters; the device comprises a test unit, a test adapter and corresponding software program, wherein the test unit consists of a power control box, a PXI test case, a signal conditioning box, a test interface array and an input-output device; all resource modules in the test unit can be used for running a test program of the test unit by testing software under the control of a PXI control computer through a PXI bus; the adapter is meshed with an RCV end by an ITA end of a test array, and is connected with test resource modules on the test unit; and the testing software comprises two parts including testing software of the test unit and testing software specially used for the adapter. After the invention is adopted, the quality level of an ARINC 429 bus signal module product can be improved, the development of a special test device is omitted, and the development cost and the maintenance cost of the test device can be greatly lowered.

Description

technical field [0001] The method relates to the technical field of automatic testing of avionics products, in particular to an automatic testing device and testing method for ARINC429 bus signal performance parameters. Background technique [0002] In the field of automatic test technology of avionics products, the test methods for the signal interface of ARINC429 bus (Digital Information Transmission System DITS) are mostly limited to the function test of the signal interface, and there is no automatic test method for the performance parameters of the signal itself. Contents of the invention [0003] For the defective that prior art exists, the object of the present invention is to provide a kind of automatic testing device of ARINC429 bus signal performance parameter; [0004] Another object of the present invention is to provide the automatic testing method of ARINC429 bus signal performance parameter; The present invention realizes automatic measurement to the perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/26
Inventor 衷崎马丽游本雨周焱
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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