Aeronautical communication equipment UV radio frequency switch network module tester

Abstract

The invention provides a tester for a UV radio frequency switch network module of aeronautical communication equipment. The tester comprises a power supply module, a control module and a radio frequency switch matrix module, the power supply module is used for supplying power to the tester and the tested UV radio frequency switch network module; the control module is used for controlling the radio frequency switch matrix module to switch a radio frequency channel of the tested UV radio frequency switch network module, controlling the working state of the tested UV radio frequency switch network module, controlling the working state of an instrument and performing data interaction with an upper computer; and the radio frequency switch matrix module is used for switching a radio frequency channel of the tested UV radio frequency switch network module under the control of the control module. According to the invention, random switching of a plurality of radio frequency channels of a plurality of sets of UV radio frequency switch network modules can be realized, and various indexes of the UV radio frequency switch network modules can be automatically tested.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation communication testing, and in particular to an aviation communication equipment UV radio frequency switch network module tester. Background Art

[0002] With the rapid development of modern science and technology, a large number of high-tech achievements have been applied to aviation communication equipment. Aviation communication systems are inevitably developing in the direction of integration, generalization, and modularization in terms of implementation methods. Their structures are becoming more and more complex, their functions are becoming more and more complete, and their automation levels are becoming higher and higher. At the same time, aviation communication equipment has higher and higher requirements for airworthiness and safety.

[0003] Testing is to use the excitation signal source product to generate an excitation signal, and after product processing, output the measured signal to the test signal analysis instrument to check whether its signal indicators meet the design requirements. Electronic information equipment testing runs through the entire electronic product manufacturing process. Electronic information equipment has multiple systems that integrate functions and performance, and has complex cross-linking relationships. In order to facilitate functional division and organize production, electronic information equipment is physically divided into module level, whole machine level and system level. Its design and manufacturing process is also the process of equipment performance formation. Affected by the dynamics of circuit design, the discreteness of device performance parameters, and the deviation of product indicators caused by assembly errors and other factors, testing is required to meet the performance indicators of electronic information equipment. Testing has become an important link in the manufacturing process of electronic information equipment. Testing is the key to ensuring the functional performance of products.

[0004] The testing of electronic information equipment involves many technical and tactical indicators. With the increasing complexity of the equipment and the improvement of performance requirements, the testing process is becoming more and more complicated. It is a relatively complex and multi-step process. There are a lot of product debugging tests and verification tests in the production process, especially high and low temperature tests, stress screening, environmental tests, electrical aging tests, etc., which may last for several days. Before the product enters the next process from the previous process, it must undergo strict performance index tests to ensure the product's qualification. From the perspective of the testing process, repeated index tests are required in the stages of normal temperature debugging, environmental testing and acceptance to eliminate faulty products.

[0005] The UV RF switch network module is composed of multiple matrix switches to achieve arbitrary configuration switching between multiple RF paths. The test function indicators mainly include arbitrary switching of more than 10 RF channels; the performance indicators mainly include insertion loss, isolation, switch conversion time, etc. At present, the manual test mode is adopted. The operator needs to set the parameters of each instrument in turn according to the process requirements to test each functional performance indicator. Since there are many indicators to be tested for the product, it takes a lot of time to set the instrument parameters, and each indicator needs to be tested repeatedly, so the test efficiency is low. At the same time, the test time of different functions and performance indicators is different. After each indicator is tested, the next indicator test parameters are set immediately. The operator needs to concentrate all the time and work for a long time, which consumes a lot of energy and physical strength of the operator, resulting in high labor intensity for the operator, which cannot meet the needs of rapid product delivery under the current situation. Summary of the invention

[0006] In view of the problems existing in the above-mentioned prior art, the present invention provides an aviation communication equipment UV radio frequency switch network module tester, which can realize arbitrary switching of multiple radio frequency channels of multiple sets of UV radio frequency switch network modules and can automatically test various indicators of the UV radio frequency switch network modules.

[0007] The present invention provides an aviation communication equipment UV radio frequency switch network module tester, comprising a power supply module, a control module and a radio frequency switch matrix module;

[0008] The power supply module is used to supply power to the tester and the UV radio frequency switch network module under test;

[0009] The control module is used to control the RF switch matrix module to switch the RF channel of the UV RF switch network module under test, control the working state of the UV RF switch network module under test, control the working state of the instrument, and perform data interaction with the host computer;

[0010] The radio frequency switch matrix module is used to switch the radio frequency channel of the tested UV radio frequency switch network module under the control of the control module.

[0011] In some specific implementations, the power supply module includes a switching power supply; the switching power supply is used to convert alternating current into direct current required by the tester and the UV radio frequency switch network module under test.

[0012] In some specific implementations, the power module further includes:

[0013] A first filter connected to an input end of the switching power supply, the first filter being used to filter the alternating current;

[0014] And a multi-phase second filter connected to the output end of the switching power supply, wherein the second filter is used to filter the direct current at the output end of the switching power supply.

[0015] In some specific implementations, the first filter and the second filter may be EMI filters.

[0016] In some specific implementations, the control module includes a control unit and a radio frequency switch matrix driving unit and a serial port conversion unit connected to the control unit.

[0017] In some specific implementations, the control unit communicates with the host computer through a serial port conversion unit, drives the RF switch matrix module through a RF switch matrix driving unit to switch the RF channel of the UV RF switch network module under test, controls the working state of the UV RF switch network module under test through a CAN card, reads back the state information of the UV RF switch network module under test, and controls each instrument through a GPIB interface to complete the automatic test of various indicators of the UV RF switch network module under test.

[0018] In some specific implementations, the control module also includes an AD conversion unit and a current sensor; the current sensor is connected to the control unit via the AD conversion unit; the current sensor is used to collect the current at the output end of the power module and convert it into a voltage signal and then input it into the AD conversion unit; the AD conversion unit is used to convert the voltage signal into a digital signal and then input it into the control unit; the control unit is used to transmit the digital signal to the host computer via the serial port conversion unit for monitoring.

[0019] In some specific implementations, an operational amplifier is used to isolate the current sensor from the AD conversion unit.

[0020] In some specific implementations, the radio frequency switch matrix module is implemented using a single-pole double-throw relay and a single-pole multi-throw radio frequency switch.

[0021] In some specific implementations, the single-pole double-throw relay and the single-pole multi-throw RF switch are selected according to the isolation index requirements of the UV RF switch network module.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. The tester of the present invention has high isolation. When switching different radio frequency channels, it can effectively suppress mutual interference between signals, maintain signal purity and stability, and adapt to complex test environments where multiple signals exist simultaneously.

[0024] 2. The present invention can realize automated testing, reduce the influence of human factors and environmental factors on test results, and ensure the accuracy of test data.

[0025] 3. The present invention can realize parallel testing. One tester can simultaneously complete the testing of 6 sets of UV radio frequency switch network modules, reducing the production change time and testing time, realizing batch rapid testing, and improving testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic diagram of the composition of the UV radio frequency switch network module tester for aviation communication equipment.

[0027] Figure 2 for Figure 1 Schematic diagram of the power module composition.

[0028] Figure 3 for Figure 1 Schematic diagram of the control module composition.

[0029] Figure 4 for Figure 1 Schematic diagram of the composition of the RF switch matrix module. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1 As shown, an embodiment of the present invention provides an aviation communication equipment UV radio frequency switch network module tester, including a power module, a control module and a radio frequency switch matrix module;

[0033] The power supply module is used to supply power to the tester and the UV radio frequency switch network module under test;

[0034] The control module is used to control the RF switch matrix module to switch the RF channel of the UV RF switch network module under test, control the working state of the UV RF switch network module under test, control the working state of the instrument, and perform data interaction with the host computer;

[0035] The RF switch matrix module is used to switch the RF channel of the UV RF switch network module under test under the control of the control module, so as to realize the gating of multiple input and output RF channels of the UV RF switch network module under test, and achieve the purpose of automatically controlling the RF channel. Thus, it is possible to realize arbitrary switching of multiple RF channels of multiple sets of UV RF switch network modules, and automatically test the power consumption index of the UV RF switch network module and the insertion loss, isolation, switch conversion time and other indicators of its RF channel.

[0036] See also Figure 2 . In some specific implementations, the power module includes a switching power supply; the switching power supply is used to convert AC power (220V / 50Hz) into DC power required by the tester and the UV RF switch network module under test, usually including +5V, -5V, +15V DC voltages. In some specific implementations, the switching power supply uses SY-60-Q5B, with outputs of 5V / 5A, -5V / 0.5A, 15V / 1A, -15V / 1A, ripples of 50mV, 50mV, 150mV, 150mV, respectively, and an efficiency of 72%. The power supply is small in size and high in power density.

[0037] In order to reduce the influence of power ripple on the tested UV RF switch network module, the power module further includes: a first filter connected to the input end of the switching power supply, the first filter is used to filter the alternating current (220V / 50Hz); and a second filter connected to the output end of the switching power supply, the second filter is used to filter the direct current at the output end of the switching power supply. In some specific implementations, the first filter and the second filter can use EMI filters, which have strong interference suppression capabilities and are easy to install.

[0038] In addition, a voltmeter and an ammeter may be provided in the power module. The voltmeter and the ammeter may be 3.5-digit digital display meters with high display accuracy and sensitivity.

[0039] See also Figure 3 In some specific implementations, the control module includes a control unit, and a radio frequency switch matrix driving unit and a serial port conversion unit connected to the control unit.

[0040] The control unit communicates with a host computer (such as a host computer implemented based on a computer) through a serial port conversion unit, drives the RF switch matrix module through a RF switch matrix driving unit to switch the RF channel of the UV RF switch network module under test, controls the working state of the UV RF switch network module under test through a CAN card, reads back the state information of the UV RF switch network module under test, and controls various instruments through a GPIB interface to complete automatic testing of various indicators of the UV RF switch network module under test.

[0041] The RF switch matrix drive unit is used to connect the control unit to the RF switch matrix module. In some specific implementations, the RF switch matrix drive unit can use a low-frequency relay, such as Panasonic's TX2-5V, with a control voltage of 5V, which can drive the RF switch matrix module through a 30V / 2A signal. The driver of the low-frequency relay can use a three-pole tube STS9013. The control unit, the RF switch matrix drive unit and the RF switch matrix module can be connected by a low-frequency cable.

[0042] In some specific implementations, the controller of the control unit can use the CPLD device XC95288XL-10PQ208 of Xilinx Company, which has 288 macro units, 166 IO ports, can complete the serial port communication and switch control functions with the computer, and has strong expansion capability. Among them, the CPLD development adopts the FPGA development environment of ALTIUM Company and is described in VHDL language. It consists of four parts: serial port receiving count, shift register, serial port sending, and serial port protocol processing.

[0043] Serial port receiving count mainly counts the serial port receiving data according to the serial port baud rate.

[0044] The shift register mainly converts the serial port received data into 8-bit parallel data.

[0045] Serial port sending, mainly 8 parallel data are sent serially.

[0046] Serial port protocol processing mainly parses the serial port protocol frame, drives the switch, and sends the current sampling value. This module adopts finite state machine design.

[0047] In some specific implementations, the control module further includes an AD conversion unit and a current sensor; the current sensor is connected to the control unit via the AD conversion unit; the current sensor is used to collect the current at the output end of the power module and convert it into a voltage signal and then input it into the AD conversion unit; the AD conversion unit is used to convert the voltage signal into a digital signal and then input it into the control unit; the control unit is used to transmit the digital signal to the host computer via the serial port conversion unit for monitoring. In some specific implementations, the AD conversion unit can use AD7824, four sampling channels, 8-bit accuracy. The current sensor can use the Hall current sensor TBC5PS5, single power supply 5V, rated current 5A, maximum current 16A. Further, an operational amplifier TL084 is used for isolation between the current sensor and the AD conversion unit.

[0048] See also Figure 4. The RF switch matrix module is implemented by a single-pole double-throw relay and a single-pole multi-throw RF switch. Taking the control of 6 tested UV RF switch network modules as an example, the RF switch matrix module uses 2 single-pole double-throw relays to control 2 single-pole six-throw RF switches, thereby controlling the selection of the 6 tested UV RF switch network modules; and then 10 single-pole double-throw relays are used to control 10 single-pole six-throw RF switches, thereby controlling the selection of RF channels such as IN1, IN2, IN external, INA, INB, INC, OUT1, OUT2, OUTA, OUTB, and OUTC in the tested UV RF switch network module, so that the signal source enters the spectrum analyzer after passing through the selected RF channel in the tested UV RF switch network module to complete the automatic test. Since the isolation index requirements of the UV RF switch network module are relatively high, in order to ensure the authenticity of the test data, the isolation of the RF switch matrix module must be at least 75dB. The selection of the RF switch matrix module is very important. If an electronic switch is used, it is difficult to obtain the index requirements for isolation, so a mechanical relay is selected. In some specific implementations, the single-pole double-throw relay uses dowkey's 401-2308, and the single-pole six-throw relay uses dowkey's 565-5308. The above two relays have the advantages of small insertion loss, wide operating frequency range, high isolation, and wide temperature range (-55 degrees Celsius to +85 degrees Celsius).

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A UV radio frequency switch network module tester for aviation communication equipment, characterized in that: Including power module, control module and radio frequency switch matrix module; The power supply module is used to supply power to the tester and the UV radio frequency switch network module under test; The control module is used to control the RF switch matrix module to switch the RF channel of the UV RF switch network module under test, control the working state of the UV RF switch network module under test, control the working state of the instrument, and perform data interaction with the host computer; The radio frequency switch matrix module is used to switch the radio frequency channel of the tested UV radio frequency switch network module under the control of the control module.

2. The aviation communication equipment UV radio frequency switch network module tester according to claim 1, characterized in that: The power supply module includes a switching power supply; the switching power supply is used to convert alternating current into direct current required by the tester and the UV radio frequency switch network module being tested.

3. The aviation communication equipment UV radio frequency switch network module tester according to claim 2, characterized in that: The power module also includes: A first filter connected to an input end of the switching power supply, the first filter being used to filter the alternating current; And a multi-phase second filter connected to the output end of the switching power supply, wherein the second filter is used to filter the direct current at the output end of the switching power supply.

4. The aviation communication equipment UV radio frequency switch network module tester according to claim 3, characterized in that: The first filter and the second filter may be EMI filters.

5. The aviation communication equipment UV radio frequency switch network module tester according to claim 1, characterized in that: The control module comprises a control unit, and a radio frequency switch matrix driving unit and a serial port conversion unit connected to the control unit.

6. The aviation communication equipment UV radio frequency switch network module tester according to claim 5, characterized in that: The control unit communicates with the host computer through the serial port conversion unit, drives the RF switch matrix module through the RF switch matrix driving unit to switch the RF channel of the tested UV RF switch network module, controls the working state of the tested UV RF switch network module through the CAN card, reads back the state information of the tested UV RF switch network module, and controls each instrument through the GPIB interface to complete the automatic test of each indicator of the tested UV RF switch network module.

7. The aviation communication equipment UV radio frequency switch network module tester according to claim 5, characterized in that: The control module also includes an AD conversion unit and a current sensor; the current sensor is connected to the control unit via the AD conversion unit; the current sensor is used to collect the current at the output end of the power module and convert it into a voltage signal and then input it into the AD conversion unit; the AD conversion unit is used to convert the voltage signal into a digital signal and then input it into the control unit; the control unit is used to transmit the digital signal to the host computer via the serial port conversion unit for monitoring.

8. The aviation communication equipment UV radio frequency switch network module tester according to claim 7, characterized in that: An operational amplifier is used between the current sensor and the AD conversion unit for isolation.

9. The aviation communication equipment UV radio frequency switch network module tester according to claim 1, characterized in that: The radio frequency switch matrix module is implemented by a single-pole double-throw relay and a single-pole multi-throw radio frequency switch.

10. The aviation communication equipment UV radio frequency switch network module tester according to claim 1, characterized in that: The single-pole double-throw relay and the single-pole multi-throw radio frequency switch are selected according to the isolation index requirements of the UV radio frequency switch network module.

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