Product port sending, receiving and functional characteristic testing device based on 1394 bus

Abstract

The utility model belongs to the field of avionics, and particularly relates to a product port sending, receiving and functional characteristic testing device based on a 1394 bus. The product port sending characteristic testing device based on the 1394 bus comprises a 1394 photoelectric repeater, an optical splitter, an optical signal analysis device and a 1394 bus analysis device, and a P0 port receiving device of a tested product is connected with a P0 port optical port sending device of the 1394 photoelectric repeater through the 1394 bus; the P0 port sending of the tested product is connected with the input end of the optical splitter through a 1394 bus; the first output end of the optical splitter is in receiving connection with a P0 port optical port of the 1394 photoelectric repeater through a 1394 bus; a second output end of the optical splitter is connected with the optical signal analysis equipment; and a P0 port electric port of the 1394 photoelectric repeater is connected with a P0 port of the 1394 bus analysis equipment through a 1394 bus.

Description

Technical Field

[0001] The utility model belongs to the field of aviation electronics, and in particular relates to a product port sending, receiving and functional characteristic testing device based on a 1394 bus. Background Art

[0002] IEEE1394 is a high-speed serial bus that was originally developed by Apple in the mid-1980s and named FireWire bus. In 1995, IEEE formulated and promulgated the IEEE 1394-1995 standard, and in 2000 launched the IEEE1394A standard, which can support transmission rates of 100Mbps, 200Mbps and 400Mbps.

[0003] In the latest IEEE1394B standard, the physical layer of the bus has been greatly improved, and the supported transmission rates have been increased to 800Mbps, 1.6Gbps and 3.2Gbps. At the same time, it has the loop reconstruction capability and can support optical fiber as the transmission medium.

[0004] Subsequently, SAE developed the military 1394 protocol AS5643 based on 1394B in 2004, and made a series of restrictions and extensions to IEEE1394B to meet the needs of military environments. After years of practical application, the reliability of the military 1394B bus has been fully verified. At present, the physical layer of the military 1394B bus technology uses electrical transmission media, with a maximum communication rate of 491.52Mbps.

[0005] With the application demand for higher network transmission bandwidth in flight control and avionics systems, as well as the development and maturity of optical interface devices and optical transmission technology, military 1394B technology based on the optical medium physical layer has become a new research direction. Optical transmission 1394 has gradually gained widespread attention due to its strong anti-electromagnetic interference capability, weight reduction, and speed increase.

[0006] The next generation of aircraft flight control network bus is planned to use the optical 1394 bus, indicating that the optical 1394 bus has become a key technology for the next generation of aircraft. However, there is currently no mature test equipment for optical 1394 and a complete test method for signal quality on the market, which has become the biggest obstacle to the further development and engineering application of this technology. Therefore, establishing a complete optical 1394 test environment and test method has become a top priority. Therefore, a product port sending, receiving and functional characteristics test device based on the 1394 bus is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide a device for testing the transmission, reception and functional characteristics of a product port based on a 1394 bus, so as to solve the problem that there is currently no mature testing equipment for optical transmission 1394 and a complete testing method for signal quality, thereby reducing the workload of testers and increasing test coverage and efficiency.

[0008] Technical solution:

[0009] A device for testing the transmission characteristics of a product port based on a 1394 bus comprises: a 1394 photoelectric repeater, an optical splitter, an optical signal analysis device and a 1394 bus analysis device, wherein:

[0010] The P0 port receiving of the tested product is connected with the P0 port optical port sending of the 1394 photoelectric repeater through the 1394 bus;

[0011] The P0 port of the product under test is connected to the input end of the optical splitter through the 1394 bus;

[0012] The first output end of the optical splitter is connected to the optical port receiving port P0 of the 1394 optical repeater through the 1394 bus;

[0013] The second output end of the optical splitter is connected to the optical signal analysis device;

[0014] The P0 port electrical port of the 1394 optical repeater is connected to the P0 port of the 1394 bus analysis device through the 1394 bus.

[0015] Furthermore, the 1394 bus analysis device has three independent 1394 channels.

[0016] Furthermore, the 1394 bus analysis device has three ports per channel and can be set to three functional modes: CC, RN and BM.

[0017] Furthermore, the 1394 optoelectronic repeater is composed of 8 1394 optoelectronic conversion boards, each of which is interconnected with 3 ports of the product under test, and supports testing of a product under test with a maximum of 24 ports.

[0018] A device for testing the receiving characteristics of a product port based on a 1394 bus, comprising: a 1394 photoelectric repeater, an optical splitter, an optical attenuator, an optical power meter, and an optical 1394 bit error test device, wherein:

[0019] The three electrical ports of the 1394 optical-electrical repeater are connected to the P0 port, P1 port and P2 port of the optical 1394 error test equipment through the 1394 bus;

[0020] The P0 port and P1 port of the tested product send and receive respectively through the 1394 bus and the P0 port optical port and P1 port optical port of the 1394 photoelectric repeater to receive and send;

[0021] The P2 port of the product under test receives a first output connection to the optical splitter via the 1394 bus;

[0022] The optical port transmission of the P2 port of the 1394 optical repeater is connected to the input end of the optical attenuator through the 1394 bus;

[0023] The output of the optical attenuator is connected to the input of the optical splitter via the 1394 bus;

[0024] The second output of the optical splitter is connected to the optical power meter through the 1394 bus.

[0025] A product function test device based on 1394 bus, including 1394 photoelectric repeater, 1394 bus analysis equipment, wherein:

[0026] The sending and receiving of the P0 port, P1 port and P2 port of the tested product are connected with the P0 port optical port, P1 port optical port and P2 port optical port of the corresponding 1394 photoelectric repeater through the 1394 bus respectively;

[0027] The P0 port electrical port, the P0 port electrical port, and the P0 port electrical port of the 1394 optical repeater are respectively connected to the P0 port, the P1 port, and the P2 port of the 1394 bus analysis device through the 1394 bus;

[0028] The output of the 1394 bus analysis device is connected to the host computer.

[0029] The advantages and effects of the utility model may be:

[0030] (1) We independently designed a 1394 optical-electrical repeater to achieve mutual conversion between 1394 optical-electrical signals and support up to 24 port tests. It has the advantages of easy operation and low cost.

[0031] (2) We have independently designed a 1394 bus test device that can configure up to three independent 1394 channels (nodes), with three ports per channel, and can be set to three functional modes: CC, RN, and BM. We provide standard DLL and supporting applications. This device is used in the fields of optical 1394 bus development and debugging, optical 1394 bus data communication, and optical 1394 bus simulation testing.

[0032] (3) Design a signal quality test method, including the test of the port sending characteristics of the product under test and the test of the port receiving characteristics of the product under test.

[0033] (4) The test equipment can realize automatic testing and is easy to operate, which greatly reduces the manpower required for testing the product under test and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution implemented by the utility model, the following is a brief introduction to the drawings required for use in the embodiments of the utility model. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a schematic diagram of a 1394 bus analysis device according to an embodiment of the present utility model.

[0036] Figure 2 It is a schematic diagram of a photoelectric repeater according to an embodiment of the utility model.

[0037] Figure 3 It is a schematic diagram of testing the port transmission characteristics of a tested product in one embodiment of the utility model.

[0038] Figure 4 It is a schematic diagram of a test of the port receiving characteristics of a tested product according to an embodiment of the present utility model.

[0039] Figure 5 This is a schematic diagram of a functional test of a product under test according to an embodiment of the utility model. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0041] The features of various aspects of the utility model embodiment will be described in detail below. In the detailed description below, many specific details are proposed in order to fully understand the utility model. However, it is obvious to those of ordinary skill in the art that the utility model can also be implemented without these specific details. The following description of the embodiment is only for a better understanding of the utility model by illustrating the example of the utility model. The utility model is not limited to any specific settings and methods provided below, but covers all tested product structures and methods covered without departing from the spirit of the utility model. Any improvement, replacement, etc. In the various drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity of the utility model.

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other, and the embodiments can be referenced and cited to each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] Figure 1 It is a schematic diagram of a 1394 bus analysis device according to an embodiment of the present utility model.

[0044] The 1394 bus analysis equipment adopts the design implementation mode of carrier board + daughter board module, in which the 1394 carrier board realizes the PCI communication interface with the host and accesses and controls the 1394 node; the 1394 module realizes the single-channel military 1394 function, and each simulation board is configured with a maximum of 3 pieces; the carrier board and daughter board are connected with high-density connectors, and the external interface is a fiber optic interface.

[0045] This example uses the PowerPC processor MPC8245 as the main processor, with FLASH and SDRAM to complete configuration loading and data storage, and realize the control of the subcard. The 1394B bus protocol module implements the AS5643 protocol on the FPGA. Its completed functions include: receiving, sending and parsing STOF packets and asynchronous stream packets, supporting message integrity management and system integrity management, etc. The 1394 chip uses the TI chip TSB41BA3 to implement the protocol processing of the 1394B physical layer, including bus message transmission arbitration, encoding and decoding of 1394B data packets, data packet forwarding between nodes, and loop detection / disconnection. The optical module realizes external optical 1394 output.

[0046] Figure 2 It is a schematic diagram of a photoelectric repeater according to an embodiment of the utility model.

[0047] like Figure 2As shown in the figure, the 1394 photoelectric repeater is composed of 8 1394 photoelectric conversion boards. Each 1394 photoelectric conversion board can realize the interconnection with 3 ports of the product under test, realize the conversion of 1394 optical path and circuit, and then complete the test of various functions of the product under test. The 1394 photoelectric repeater can support the test of the product under test with a maximum of 24 ports.

[0048] Figure 3 It is a schematic diagram of testing the port transmission characteristics of a tested product in one embodiment of the utility model.

[0049] like Figure 3 As shown, the method may include the following steps:

[0050] Step 1: Connect the P0 port of the product under test to the optical splitter;

[0051] Step 2: Connect the P0 port receiving of the product under test to the P0 port sending of the 1394 optical repeater;

[0052] Step 3: Connect the two outputs of the optical splitter to the optical signal analysis device and the P0 port receiving port of the 1394 optical repeater respectively;

[0053] Step 4: Connect the P0 port (electrical port) of the 1394 optical repeater to the P0 port of the 1394 bus analysis device;

[0054] Step 5: Power on the 1394 photoelectric repeater, 1394 bus analysis equipment, and the product under test;

[0055] Step 6: Use the 1394 bus analysis equipment to confirm that the bus topology between the 1394 photoelectric repeater and the product under test is successfully established;

[0056] Step 7: Set up the optical signal analysis equipment and select the corresponding eye diagram template;

[0057] Step 8: Record the readings of the optical signal analysis device, where the average transmitted optical power measured by the optical signal analysis device is P1, and the actual average transmitted optical power of the tested finished product is P=P1+P2 (P2 is the link attenuation value);

[0058] Step 9: Repeat the above test for the remaining ports of the product under test and record the test results.

[0059] The self-developed 1394 photoelectric repeater can realize photoelectric conversion supporting up to 24 ports; and the self-developed 1394 bus test equipment can realize configuration of up to 3 independent 1394 channels (nodes) and support three functional modes of CC, RN and BM, thus realizing the fields of optical 1394 bus development and debugging, optical 1394 bus data communication, optical 1394 bus simulation test, etc.

[0060] The 1394 bus analysis device can be configured with up to 3 independent 1394 channels (nodes), each with 3 ports, and can be set to CC, RN and BM modes. It provides standard DLL and supporting applications. It is used in the fields of optical 1394 bus development and debugging, optical 1394 bus data communication, optical 1394 bus simulation test, etc.

[0061] The 1394 bus analysis device can support CC / RT / BM functions; support channel number, STOF period / precision, send / receive offset settings; support topology display function, bus reset operation, port status setting / monitoring function; support single packet sending, periodic sending, cyclic sending, and can set the number of times the STOF packet and asynchronous stream packet are sent: limited sending and unlimited repeated sending; support VPC, packet length, CRC fault settings; support recording function, and can distinguish VPC, packet length, CRC errors; support filtering function under recording function; support real-time monitoring function, including data packet count, error packet count, reset count, etc.

[0062] The 1394 photoelectric repeater consists of 8 1394 photoelectric conversion boards. Each 1394 photoelectric conversion board can realize the interconnection with 3 ports of the product under test. As a switching method, it can be connected with other tests to complete the function test of the product under test. The 1394 photoelectric repeater can support the test of 24 ports of the product under test at the same time.

[0063] Figure 4 It is a schematic diagram of a test of the port receiving characteristics of a tested product according to an embodiment of the present utility model.

[0064] like Figure 4 As shown, the method may include the following steps:

[0065] Step 1: Connect the P0 port, P1 port, and P2 port of the tested product to the P0 port, P1 port, and P2 port of the 1394 optical repeater respectively;

[0066] Step 2: Connect the P2 port of the product under test to the optical splitter;

[0067] Step 3: Connect the P2 port of the 1394 optical repeater to the optical attenuator;

[0068] Step 4: Connect the optical attenuator to the optical splitter;

[0069] Step 5: Connect the 2-way output of the optical splitter to the optical power meter and the 2-port receiver of the product under test;

[0070] Step 6: Connect the three ports of the 1394 optical repeater to the P0 port, P1 port and P2 port of the optical 1394 bit error test equipment;

[0071] Step 7: Power on the 1394 photoelectric repeater, bus error test equipment, and the product under test;

[0072] Step 8: Start the bus signal bit error test equipment test software. The default startup interface is the bit error rate test control panel.

[0073] Step 9: Click the config option and set the corresponding test rate;

[0074] Step 10: Set the optical oscilloscope attenuation and slowly lower it to confirm that the topology can be established normally;

[0075] Step 11: Power on and off the optical repeater to confirm that the topology can be established normally.

[0076] Step 12: Select the corresponding bit error rate and confidence level in the test table;

[0077] Step 13: After the test is completed, check the test results on the test interface;

[0078] Step 14: After the test is completed, the interface displays "PASS", indicating that the receiving characteristics test has passed. Continue to adjust the optical attenuator to lower the optical power. After the test is completed, the interface displays "FAIL", indicating that the receiving characteristics test has failed. Increase the optical power.

[0079] Step 15: Repeat steps 10-14 until the port sensitivity index of the device under test is tested;

[0080] Step 16: Repeat the above test for the remaining ports of the product under test and record the test results.

[0081] Figure 5 It is a schematic diagram of testing the port transmission characteristics of a tested product in one embodiment of the utility model.

[0082] like Figure 5 As shown, the method may include the following steps:

[0083] Step 1: Connect the P0 port, P1 port, and P2 port of the product under test to the three receiving ports of the 1394 photoelectric repeater;

[0084] Step 2: Connect the three ports of the 1394 optical repeater to the P0 port, P1 port and P2 port of the optical 1394 error test equipment;

[0085] Step 3: Connect the 1394 bus analysis device to the test host computer;

[0086] Step 4: Perform the following functional tests: STOF packet normal reception test, STOF packet VPC error injection detection test, STOF packet periodic error injection detection test, asynchronous flow packet sending test, asynchronous flow packet normal reception test, asynchronous flow packet VPC error injection detection test, asynchronous flow packet reception message ignoring test.

[0087] It should be noted that the above process operations can be combined and applied to different degrees. For the sake of simplicity, the implementation methods of various combinations are not described in detail. Those skilled in the art can flexibly adjust the order of the steps of the above method (or the position of the components of the tested product) according to actual conditions, or perform combination operations.

[0088] It should be noted that the implementation of the functional components shown in the above embodiments can be hardware, software or a combination of the two. When implemented in hardware, it can be an electronic circuit, an application specific integrated circuit (ASIC), a plug-in, a function card, etc. When implemented in software, it can be a program or code segment used to perform the required task. The program or code segment can be stored in a machine or readable medium, or it can be transmitted on a transmission medium or a communication link through a data signal carried in a carrier.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the utility model, and these modifications or substitutions should be included in the protection scope of the utility model.

Claims

1. A product port transmission characteristic test device based on 1394 bus, characterized in that: include: 1394 optoelectronic repeater, optical splitter, optical signal analysis equipment and 1394 bus analysis equipment, wherein: The P0 port receiving of the tested product is connected with the P0 port optical port sending of the 1394 photoelectric repeater through the 1394 bus; The P0 port of the product under test is connected to the input end of the optical splitter through the 1394 bus; The first output end of the optical splitter is connected to the optical port receiving port P0 of the 1394 optical repeater through the 1394 bus; The second output end of the optical splitter is connected to the optical signal analysis device; The P0 port electrical port of the 1394 optical repeater is connected to the P0 port of the 1394 bus analysis device through the 1394 bus.

2. The device for testing the product port transmission characteristics based on the 1394 bus according to claim 1, characterized in that: The 1394 bus analysis device has 3 independent 1394 channels.

3. The product port transmission characteristic testing device based on 1394 bus according to claim 1 is characterized in that: The 1394 bus analysis device has three ports per channel and can be set to three functional modes: CC, RN and BM.

4. The product port transmission characteristic testing device based on 1394 bus according to claim 1 is characterized in that: The 1394 photoelectric repeater consists of 8 1394 photoelectric conversion boards. Each 1394 photoelectric conversion board is interconnected with 3 ports of the product under test, and supports the testing of a maximum of 24 ports of the product under test.

5. A product port receiving characteristic test device based on 1394 bus, characterized in that: include: 1394 photoelectric repeater, optical splitter, optical attenuator, optical power meter, optical 1394 error code test equipment, including: The three electrical ports of the 1394 optical-electrical repeater are connected to the P0 port, P1 port and P2 port of the optical 1394 error test equipment through the 1394 bus; The P0 port and P1 port of the tested product send and receive respectively through the 1394 bus and the P0 port optical port and P1 port optical port of the 1394 photoelectric repeater to receive and send; The P2 port of the product under test receives a first output connection to the optical splitter via the 1394 bus; The optical port transmission of the P2 port of the 1394 optical repeater is connected to the input end of the optical attenuator through the 1394 bus; The output of the optical attenuator is connected to the input of the optical splitter via the 1394 bus; The second output of the optical splitter is connected to the optical power meter through the 1394 bus.

6. A product function test device based on 1394 bus, characterized in that: Including 1394 photoelectric repeater, 1394 bus analysis equipment, among which, The sending and receiving of the P0 port, P1 port and P2 port of the tested product are connected with the P0 port optical port, P1 port optical port and P2 port optical port of the corresponding 1394 photoelectric repeater through the 1394 bus respectively; The P0 port electrical port, the P0 port electrical port, and the P0 port electrical port of the 1394 optical repeater are respectively connected to the P0 port, the P1 port, and the P2 port of the 1394 bus analysis device through the 1394 bus; The output of the 1394 bus analysis device is connected to the host computer.

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