CN206698228U - Very high frequency(VHF) transceiver hardware of automatic test system - Google Patents

Abstract

The utility model relates to a VHF transceiver automatic testing hardware system, comprising: a PXI embedded controller, which realizes the overall control of the testing hardware system; an ARINC-429 board, which analyzes the ARINC-429 data sent or received in real time; and a data acquisition card , equipped with an analog low-frequency signal analyzer that includes a fast Fourier transform algorithm; a digital and vector signal generator, used to generate modulated signals with different characteristics to a VHF transceiver; a wireless communication comprehensive tester, which provides both input signals and even The high-frequency transceiver also analyzes the output signal of the VHF transceiver; the switch resource is used for the input/output signal selection of the VHF transceiver and the configuration of the discrete pin state. The utility model can realize the full automation of the VHF transceiver Fault testing, locating the fault location, simple structure, reducing test bench hardware cost, saving test manpower, reducing test error rate, greatly improving test efficiency.

Description

VHF Transceiver Automatic Test Hardware System

technical field

The utility model relates to an automatic testing hardware system, in particular to a fault automatic testing hardware system for a VHF transceiver.

Background technique

As an important component of the VHF communication system, the VHF transceiver is the main device used for communication on special vehicles, such as aircraft or ships. The VHF transceiver works in the frequency band 118.000MHz~136.99167MHz. When transmitting, the transceiver uses a frequency synthesizer to provide a stable reference frequency. The signal is modulated to the carrier and then sent through the antenna; when receiving, the receiver receives the signal from the antenna. , after amplification, detection, and squelch processing, it becomes an audio signal. The operation steps of the original VHF transceiver fault test system are cumbersome and require manual judgment of the test results. The test accuracy and efficiency need to be improved.

Utility model content

The technical problem to be solved by the utility model is to provide a high-efficiency VHF transceiver automatic fault testing hardware system.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions to realize.

VHF transceiver automated testing hardware system, which includes:

PXI embedded controller controls the VHF transceiver to be tested, ARINC-429 board, data acquisition card, switch resources, digital and vector signal generator, and wireless communication comprehensive tester to complete the fault test according to the parameter test process;

ARINC-429 board, connected with PXI embedded controller, controlled by PXI embedded controller, forms ARINC-429 data communication link with VHF transceiver, and communicates with it; ARINC-429 board is equipped with ARINC - 429 control panel for real-time analysis of sent or received ARINC-429 data;

The data acquisition card is connected with the PXI embedded controller and controlled by the PXI embedded controller to collect and analyze the low frequency signal output from the VHF transceiver;

Switch resource, connected with PXI embedded controller, controlled by PXI embedded controller, used for VHF transceiver input/output signal selection and configuration of discrete pin status;

Digital and vector signal generators, connected with PXI embedded controllers, controlled by PXI embedded controllers, used to generate modulation signals with different characteristics to VHF transceivers;

The wireless communication comprehensive tester is connected with the PXI embedded controller and controlled by the PXI embedded controller. It can not only provide the input signal to the VHF transceiver but also analyze the output signal of the VHF transceiver.

Further, the ARINC-429 board is provided with a PXI interface, and is connected with a PXI embedded controller through a PXI chassis.

Further, the data acquisition card is provided with a PXI interface, and is connected with a PXI embedded controller through a PXI chassis.

Further, the described digital and vector signal generator is provided with a GPIB interface, and is connected to the PXI embedded controller through the PXI-GPIB board on the PXI chassis.

Further, the wireless communication comprehensive tester is provided with a GPIB interface, and is connected to the PXI embedded controller through the PXI-GPIB board on the PXI chassis.

Further, the switch resource includes a matrix switch board, a single-pole single-throw switch board and a single-pole double-throw switch board, all of which are provided with a PXI interface, connected to a PXI embedded controller through a PXI chassis, and equipped with an ARINC The -608A standard receiver and adapter connect the VHF transceiver to be tested, the digital and vector signal generator and the wireless communication comprehensive tester.

Furthermore, the PXI embedded controller is also connected to the programmable DC power supply through the USB port.

In the VHF transceiver automatic testing hardware system, the PXI embedded controller controls the programmable DC power supply to supply power for the VHF transceiver, controls the radio communication comprehensive tester to provide input signals or analyze output signals for testing, and controls the digital and The vector signal generator outputs the modulated signal to the VHF transceiver as its input signal, the control switch resource determines the state of the discrete control pin of the VHF transceiver and selects the input signal, and collects the VHF transceiver through the data acquisition card The output low-frequency signal is analyzed and communicated interactively with the VHF transceiver through the ARINC-429 board.

Compared with the prior art, the advantages and beneficial effects of the present invention are:

1) The utility model has a simple structure and is easy to build and realize. It greatly facilitates testers to debug the VHF transceiver to be tested.

2) The utility model can automatically test the failure of the VHF transceiver according to the standard test process and generate a test report to help testers locate the fault location, reduce test errors caused by human factors, and greatly improve test efficiency.

3) The utility model uses a signal acquisition card to simulate a low-frequency signal analyzer instead of an oscilloscope and a spectrum analyzer, thereby reducing the cost of the test bench hardware.

Description of drawings

Fig. 1 is a schematic diagram of the principle composition framework of the hardware system in the example;

Fig. 2 is a schematic diagram of a workflow in the example.

detailed description

In order to facilitate the understanding of those skilled in the art, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be pointed out that the utility model is a technical solution proposed for the hardware structure part. The control program part is all provided with the product or can be implemented by those skilled in the art with reference to the prior art.

As shown in Figure 1, the VHF transceiver automatic test hardware system represented by the utility model includes PXI embedded controller, PXI chassis, ARINC-429 board card, data acquisition card, switch resource, digital and vector signal generator , Wireless communication comprehensive tester, programmable DC power supply.

Among them, the PXI embedded controller has PXI bus and USB interface, and the automatic test hardware system is installed on the system, and there is a corresponding VHF transceiver test script. Through the PXI bus on the PXI chassis, it is connected with PXI devices such as ARINC-429 boards, data acquisition cards, switch resource boards, and PXI-GPIB boards. The vector signal generator is connected, and the USB interface is connected to the programmable DC power supply.

Described radio communication comprehensive tester is provided with GPIB interface, is connected with PXI embedded controller through PXI-GPIB board card, and signal input terminal is connected to VHF transceiver signal output terminal through switch resource, and signal output terminal is connected through switch resource Connect to the VHF transceiver signal input terminal.

Described digital and vector signal generator is provided with GPIB interface, is connected with PXI embedded controller by GPIB board card, and signal output end is connected to the signal input end of VHF transceiver through switch resource, provides input modulation radio frequency for testing Signal.

The switch resources include matrix switch boards, single-pole single-throw (SPST, single-pole single-throw) switch boards, and single-pole double-throw (SPDT, single-pole double-throw) switch boards, with PXI interfaces, Connect directly to the PXI chassis through the PXI slot.

The data acquisition card is provided with a PXI interface, directly connected to the PXI chassis through the PXI slot, and the input end is connected to the output end of the VHF transceiver through the switch resource.

The ARINC-429 board is provided with a PXI interface, and is connected to a PXI chassis through a PXI slot, and both input and output are connected to switch resources.

The VHF transceiver to be tested is connected to a switch resource, through which it is connected to test equipment such as a radio communication comprehensive tester, a digital and vector signal generator, a data acquisition card, and a power supply.

The programmable DC power supply is connected to the PXI embedded controller through the USB interface, and the PXI embedded controller controls its output +27.5V or +18V DC voltage, which is connected to the VHF transceiver to be tested through the switch resource for use during testing.

The wireless communication comprehensive tester has a programmable feature. It is connected to the PXI-GPIB board on the PXI chassis through the GPIB interface, and finally connected to the PXI embedded controller. The input terminal of the VHF transceiver, and analyze the test indicators such as the sensitivity of the output signal of the VHF transceiver.

The digital and vector signal generator is connected to the PXI-GPIB board on the PXI chassis through the GPIB interface, and finally connected to the PXI embedded controller. The PXI embedded controller controls it to generate D8PSK modulation signals with different characteristics to high-frequency transceiver signals Input terminal, complete the function test of VDL MODE2 mode.

The data acquisition card has a PXI interface, which is directly connected to the PXI chassis through the PXI slot, and connected to the PXI embedded controller through the PXI bus. Just as an example, the PXI embedded controller can call different analysis algorithm functions, and can perform time domain or frequency domain analysis on the low frequency output signal of the VHF transceiver. If frequency domain analysis is involved, it is mainly through fast Fourier transform Algorithms to convert time domain waveforms to frequency domain. Functions for simulating digital oscilloscopes and spectrum analyzers.

ARINC-429 board (in the prior art, the ARINC429 bus has simple structure, stable performance, and strong anti-interference. The biggest advantage is high reliability, which is due to non-centralized control, reliable transmission, and good error isolation.) with 8 8 receiving channels, directly connected to the PXI chassis through the PXI slot, and connected to the PXI embedded controller through the PXI bus. The high-frequency transceiver may receive and decode the ARINC-429 format data output from the transceiver under test, thereby completing the communication of the digital link. In addition, the PXI embedded controller is equipped with an ARINC-429 data control panel, which displays real-time ARINC-429 data of 16 channels of 8 transmissions and 8 receptions. A string of data, similarly, the sending channel can also send ARINC-429 data with specific meaning, which greatly facilitates the testers to debug the high-frequency transceiver to be tested.

Switch resources include a group of matrix switch boards, multiple sets of single-pole single-throw switch boards and single-pole double-throw switch boards, with PXI interface, directly connected to the PXI chassis through the PXI slot, and connected to the PXI embedded controller through the PXI bus Connected, used to connect the VHF transceiver to be tested with the test equipment, and play the role of selecting the input/output signal of the VHF transceiver and configuring the state of the discrete pins, so that by inputting specific ARINC-429 instructions and specific discrete The pin configuration allows the VHF transceiver to work in a specific mode, and completes the parameter index test of the receiver and transmitter in different modes.

All the test equipment mentioned above, including ARINC-429 boards, data acquisition cards, switch resources, digital and vector signal generators, wireless communication comprehensive testers, programmable DC power supplies, and VHF transceivers to be tested are connected to the ARINC -608A aviation standard design receiver, and then through the design adapter to connect the test equipment and the VHF transceiver according to the needs of the test process. For example, the output terminal of the programmable DC power supply is connected to one of the channels of the single-pole single-throw switch board through an adapter, and then connected to the power input pin of the VHF transceiver, so that the closing or opening of the single-pole single-throw switch can be controlled. Select whether to supply power to the VHF transceiver.

In concrete implementation, PXI embedded controller can adopt any automation test platform. As an example, the following functions can be realized:

1) According to the VHF transceiver standard test process, load the automatic test script to control the VHF transceiver and test equipment to be tested (including wireless communication comprehensive tester, digital and vector signal generator, data acquisition card, ARINC-429 board, switching resources, programmable DC power supply) make the VHF transceiver switch to different working modes, input a variety of specific signals and analyze the output signal of the transceiver, so as to complete the fault automation test.

2) Generate a corresponding test report according to the results of the automated fault test.

Among them, the PXI interface series boards such as ARINC-429 boards, switch boards, and signal acquisition cards provide a unified calling interface for platform calling through the dynamic link library packaging technology, and the rest of the wireless communication comprehensive tester, digital and vector signal generation The controller and programmable DC power supply are programmed and controlled through standard SCPI commands.

As an application example, as shown in Figure 2, the automated test platform is initialized at the beginning of the test, the drivers of all test equipment are loaded, and the test equipment is self-tested according to the test script written by itself. Then import all the test step lists, which have included the complete standard test process of the VHF transceiver in order, and each test step contains a different test script. Testers can choose to run all the test steps on the list automatically in order, or selectively run some test step items according to their needs. The test script strictly follows the steps in the standard test process to control the test equipment to perform fault tests on the VHF transceiver to be tested, and compares the test results with the expected standard values and outputs them to the test report, which is used for testers to locate and even HF transceiver fault location.

Claims (7)

1. very high frequency(VHF) transceiver automatic test hardware system, it is characterised in that including：

PXI embedded controllers, control very high frequency(VHF) transceiver to be measured, ARINC-429 boards, data collecting card, Switch Resource, number Word and vector signal generator, integrated wireless communication tester complete fault test according to the flow of parameter testing；

ARINC-429 boards, it is connected with PXI embedded controllers, by PXI embedded controller controls, with very high frequency(VHF) transceiver ARINC-429 data links are formed, are communicated；ARINC-429 boards are configured with ARINC-429 control panels, For analyzing the ARINC-429 data for sending or receiving in real time；

Data collecting card, it is connected with PXI embedded controllers, by PXI embedded controller controls, gathers and analyze from very high The low frequency signal of frequency transceiver output；

Switch Resource, it is connected with PXI embedded controllers, it is defeated for very high frequency(VHF) transceiver by PXI embedded controller controls Enter/output signal selection and configure discrete pin status；

Numeral and vector signal generator, are connected with PXI embedded controllers, by PXI embedded controller controls, for producing The modulated signal of different characteristic is to very high frequency(VHF) transceiver；

Integrated wireless communication tester, it is connected with PXI embedded controllers, by PXI embedded controller controls, can provides defeated Enter signal to the output signal of very high frequency(VHF) transceiver and can analysis very high frequency(VHF) transceiver.

2. very high frequency(VHF) transceiver automatic test hardware system according to claim 1, it is characterised in that：Described ARINC-429 boards are provided with PXI interfaces, are connected by PXI cabinets with PXI embedded controllers.

3. very high frequency(VHF) transceiver automatic test hardware system according to claim 1, it is characterised in that：Described data Capture card is provided with PXI interfaces, is connected by PXI cabinets with PXI embedded controllers.

4. very high frequency(VHF) transceiver automatic test hardware system according to claim 1, it is characterised in that：Described numeral Gpib interface is provided with vector signal generator, PXI embedded Controls are connected to by the PXI-GPIB boards above PXI cabinets Device.

5. very high frequency(VHF) transceiver automatic test hardware system according to claim 1, it is characterised in that：Described is wireless Communication synthesis tester is provided with gpib interface, and PXI embedded Controls are connected to by the PXI-GPIB boards above PXI cabinets Device.

6. very high frequency(VHF) transceiver automatic test hardware system according to claim 1, it is characterised in that：Described switch Resource includes a matrix switch board, single-pole single-throw switch (SPST) board and single-pole double-throw switch (SPDT) board, is equipped with PXI interfaces, leads to PXI cabinets are crossed with PXI embedded controllers to be connected, by the receiver with ARINC-608A standards and adapter by it is to be measured very High Frequency Transceiver, numeral and vector signal generator connect with integrated wireless communication tester.

7. very high frequency(VHF) transceiver automatic test hardware system according to claim 1, it is characterised in that：PXI is embedded Controller is also connected by USB port with programmable DC power supply.