A test fixture for an optical transmission device

Abstract

This invention belongs to the field of optical transmission equipment performance testing technology, specifically providing a test fixture for optical transmission equipment. The fixture includes a test computer and a test platform, which is formed by two side plates (left and right), a top and bottom cover plate, a bottom plate, a front panel, and a back plate. The test platform has a DB9 female connector, an RJ45 adapter socket, and a 12-pin circular connector. The outer side of the 12-pin circular connector connects to the product under test (DUT). The outer side of the DB9 female connector connects to the test computer, and the inner side connects to the inner side of the RJ45 adapter socket. The outer side of the RJ45 adapter socket connects to the DUT. The bottom plate of the test fixture has an AC contactor for power adaptability testing of the DUT. By using this test fixture, there is no need to build the test platform several times; only a few minutes are needed to connect the DUT to the test fixture, and all tests can be completed by operating the fixture. The structure is simple and the operation is convenient.

Description

Technical Field

[0001] This invention relates to the field of optical transmission equipment performance testing technology, and more specifically, to a testing fixture for optical transmission equipment. Background Technology

[0002] With the rapid development of communication technology, optical fiber communication technology has become an important means of communication. Optical fiber transmission systems have advantages such as large capacity, long transmission distance, and strong anti-interference ability, and play an irreplaceable role in communication transmission.

[0003] Optical transmission equipment is a type of device used in fiber optic communication; essentially, it's a converter that transforms electrical signals into optical signals and vice versa. Based on transmission method, optical transmission equipment is divided into two categories: digital optical transmission equipment and analog optical transmission equipment. Digital optical transmission equipment digitizes the image, voice, and data signals to be transmitted, then multiplexes these digital signals, converting multiple low-speed digital signals into a single high-speed signal, and then converts this signal back into an optical signal. At the receiving end, the optical signal is converted back into an electrical signal, the high-speed signal is decomposed into the original multiple low-speed signals, and finally, these data signals are restored to the original image, voice, and data signals. Analog optical transmission equipment modulates the signal to be transmitted by amplitude or frequency, then converts the modulated electrical signal into an optical signal; at the receiving end, the optical signal is converted back into an electrical signal, and then the signal is demodulated to restore the image, voice, or data signal.

[0004] After optical transmission equipment is mass-produced, its performance needs to be tested, including camera testing, RS422 interface performance testing, power adaptability testing, and relay control testing. Each performance indicator test requires a separate test platform. While it's possible to test all the indicators of the optical transmission equipment, setting up several test platforms can take an hour to complete all performance tests, resulting in a significant time commitment for the testing platform setup. Summary of the Invention

[0005] This invention addresses the technical problems of inconsistent and inefficient construction of optical transmission equipment performance testing platforms in existing technologies.

[0006] The present invention provides a test fixture for an optical transmission device, including a test computer and a test fixture. The test fixture is formed by two test fixture side plates distributed on the left and right, a test fixture cover plate and a test fixture bottom plate distributed on the top and bottom, and a test fixture front panel and a test fixture back panel distributed on the front and back.

[0007] The test fixture panel is equipped with a DB9 female connector, an RJ45 adapter socket, and a 12-pin circular connector.

[0008] The outer side of the DB9 female connector is connected to the test computer, and the inner side is connected to the inner side of the RJ45 adapter socket. The outer side of the RJ45 adapter socket is connected to the product under test.

[0009] The test fixture base plate is equipped with an AC contactor for power adaptability testing of the product under test. The AC contactor is connected to the inside of a 12-pin circular connector, and the outside of the 12-pin circular connector is connected to the product under test.

[0010] Preferably, the test fixture consists of two test fixture side plates distributed on the left and right, a test fixture cover plate and a test fixture bottom plate distributed on the top and bottom, and a test fixture front panel and a test fixture back panel distributed on the front and back, all made of bakelite.

[0011] Preferably, the product under test includes product under test A and product under test B, which are connected by optical fiber to transmit data. Product under test A is connected to an RJ45 adapter socket, product under test B is connected to the outside of an RJ45 adapter socket, and product under test A is connected to the outside of a 12-pin circular connector.

[0012] Preferably, the test fixture panel is provided with an RJ45 network interface, one end of which is connected to a camera and the other end is connected to the product under test B.

[0013] Preferably, the test fixture base plate is provided with an AC contactor for power adaptability testing of the product under test. By manually pressing the button switch on the test fixture panel, a TTL control signal is output. The TTL control signal is transmitted to the AC contactor in the test fixture through the product under test to control the closing of the AC contactor. At the same time, the working status of the product under test is observed when the AC contactor is in the closed state.

[0014] When the control contact is disconnected, the 220V AC power supply of the product under test will automatically switch to 48V DC power supply. At the same time, observe the product signal transmission and the status of the AC contactor to observe the working status of the product under test.

[0015] Preferably, the test fixture base plate is provided with an AC contactor control board, which is used to control the closing or opening of the AC contactor.

[0016] Preferably, the test fixture base plate is provided with a power module, and the test fixture back plate is provided with a power socket. The power socket is connected to an external power source, which supplies power to the product under test on one hand, and supplies power to the test fixture on the other hand through voltage conversion via the power module.

[0017] Preferably, the test fixture base plate is provided with a PoE network cable power supply interface for powering the camera.

[0018] Preferably, the test fixture cover plate is provided with an arc-shaped handle for handling and moving the test fixture.

[0019] Preferably, the test fixture panel is provided with a terminal block for connecting an external multimeter, and the terminal block is internally connected to the product under test.

[0020] Beneficial Effects: This invention provides a test fixture for optical transmission equipment, comprising a test computer and a test fixture. The test fixture is formed by two side plates distributed left and right, a cover plate and a base plate distributed top and bottom, and a front and back panel and a back plate distributed front and rear. The test fixture panel is equipped with a DB9 female connector, an RJ45 adapter socket, and a 12-pin circular connector. The outer side of the DB9 female connector connects to the test computer, and the inner side connects to the inner side of the RJ45 adapter socket. The outer side of the RJ45 adapter socket connects to the product under test. The base plate of the test fixture is equipped with an AC contactor for power adaptability testing of the product under test. The AC contactor connects to the inner side of the 12-pin circular connector, and the outer side of the 12-pin circular connector connects to the product under test. By using the test fixture, it is unnecessary to build the test platform several times. Only a few minutes are needed to connect the product under test to the test fixture, and all tests can be completed by operating the test fixture. The structure is simple and the operation is convenient. Attached Figure Description

[0021] Figure 1 An exploded view of a test fixture structure for an optical transmission device provided by the present invention;

[0022] Figure 2 This invention provides a test wiring diagram for a test fixture of an optical transmission device.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Power socket, 2. PoE network cable power supply interface, 3. Test fixture back plate, 4. AC contactor, 5. Test fixture side plate, 6. AC220-DC48 power module, 7. Test fixture front panel, 8. Test fixture base plate, 9. Terminal block, 10. 12-pin circular connector, 13. DB9 female connector, 14. Push button switch, 15. AC contactor control board, 16. Test fixture cover plate, 17. Bow-shaped equipment handle. Detailed Implementation

[0025] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0026] Figure 1This invention provides a test fixture for an optical transmission device, comprising a test computer and a test fixture. The test fixture is formed by two side plates distributed left and right, a cover plate 16 and a base plate 8 distributed top and bottom, and a front panel 7 and a back plate 3 distributed front and back. The test fixture panel 7 is provided with a DB9 female connector 13, an RJ45 adapter socket, and a 12-pin circular connector 10. The outer side of the DB9 female connector 13 connects to the test computer, and the inner side connects to the inner side of the RJ45 adapter socket. The outer side of the RJ45 adapter socket connects to the product under test. The test fixture base plate 8 is provided with an AC contactor 4 for power adaptability testing of the product under test. The AC contactor 4 connects to the inner side of the 12-pin circular connector 10, and the outer side of the 12-pin circular connector 10 connects to the product under test. By using the test fixture, it is not necessary to build the test platform several times. Only a few minutes are needed to connect the product under test to the test fixture, and all tests can be completed by operating the test fixture. The structure is simple and the operation is convenient.

[0027] The test fixture base plate 8 is equipped with a power module 6, an AC contactor 4, and an AC contactor control board 15. The test fixture back plate 3 is equipped with a power socket 1, which is connected to an external power source. This power socket 1 supplies power to the product under test and, through voltage conversion by the power module 6, supplies power to the test fixture. The multi-channel, three-hole power socket 1 is fixed to the test fixture back plate 3 with screws. After an external power source is introduced, it supplies power to the product under test and, through voltage conversion by the AC220-DC48 power module 6, supplies power to the test fixture.

[0028] In a preferred embodiment, the test fixture comprises two side plates distributed on the left and right, a cover plate 16 and a base plate 8 distributed on the top and bottom, and a front and rear panel 7 and a back plate 3, all made of bakelite. Bakelite has high mechanical strength, good insulation, heat resistance, and corrosion resistance.

[0029] In a preferred embodiment, the product under test includes product under test A and product under test B. Product under test A and product under test B are connected by optical fiber to transmit data. Product under test A is connected to an RJ45 adapter socket, product under test B is connected to the outside of an RJ45 adapter socket, and product under test A is connected to the outside of a 12-pin circular connector 10.

[0030] Specifically, product B under test is powered via a 220V aviation interface power supply cable connected to a multi-channel three-prong power socket 1. The RJ45 network interface and RJ45 adapter socket on the test fixture panel 7 are both connected to the network port of product B under test via network cables for data signal transmission between the test fixture and product B. A USB-to-485 & 422 serial cable connects the test computer to the test fixture for data and signal command transmission between the two. Furthermore, product A under test and product B under test are connected via fiber optic cable for command data transmission between them.

[0031] During the simulated camera control test, the PC (test computer) logs into the browser, enters the camera's IP address, and transmits the data to the product under test (DUT) A via a USB-to-485 & 422 serial cable. DUT A then transmits the data to DUT B via fiber optic cable, and DUT B transmits the data to the test fixture via a network cable, thus enabling control of the camera on the fixture.

[0032] The specific process for performing RS422 interface performance testing on the product is as follows: The test host computer software on the PC (test computer) sends 485 & 422 signals to the product under test (A) via a USB-to-485 & 422 serial cable. Specifically, the test computer is connected to DB9 female connector 13 on the test fixture, the other end of DB9 female connector 13 is connected to an RJ45 adapter socket, and the RJ45 adapter socket is connected to the product under test (B).

[0033] Specifically, there are 11 RJ45 adapter sockets in total. Two of them are connected to the internal AC contactor control board 15 and are connected to the product to transmit control signals from the AC contactor 4. The other nine RJ45 adapter sockets are connected to nine DB9 female connectors 13 and are connected to the product to perform RS422 interface performance testing. The DB9 female connectors 13 are used to connect and test the product to transmit signals.

[0034] Product A under test transmits data to Product B under test via optical fiber. Product B then transmits the data to the test fixture via an RJ45 adapter. This allows for testing of the RS422 interface performance of the products, including transmission rate and bit error rate.

[0035] The test fixture base plate 8 is equipped with an AC contactor 4 for power adaptability testing of the product under test (DUT). A TTL control signal is output by manually pressing the button switch 14 on the test fixture panel 7. This TTL control signal is transmitted via the DUT to the AC contactor 4 in the test fixture, controlling its closure. The operating status of the DUT is observed when the AC contactor 4 is closed. When the contactor is open, the DUT's 220V AC power supply automatically switches to 48V DC power. The signal transmission and the status of the AC contactor 4 are observed, along with the DUT's operating status. Specifically, the TTL control signal is transmitted to the DUT A through a 12-pin circular connector 10. The DUT B can also receive the TTL control signal from the DUT A via optical fiber. Following these steps completes the power adaptability test of the DUT.

[0036] When performing remote control testing on a product, after the product under test is powered on, the switches on the test fixture panel 7 are sequentially closed / opened to output TTL control signals. The TTL control signals are transmitted through the product under test A, and then transmitted through optical fiber to the product under test B, which in turn controls the AC contactor 4. The closed and open states of the AC contactor 4 are observed. The AC contactor 4 is tested by controlling the switches of the test fixture, and the state of the AC contactor 4 is observed accordingly.

[0037] The test fixture base plate 8 is equipped with a PoE network cable power supply interface 2 for powering the camera. The PoE network cable power supply interface 2 is used to connect a 1080P camera with a focal length of 2.8mm to power the camera of the product under test. Then, one end of the RJ45 network interface is connected to the camera, and the other end is connected to the product for camera function testing.

[0038] In a preferred embodiment, the test fixture panel 7 is equipped with a push-button switch 14 with a built-in green indicator light, which is connected to the internal AC contactor control board 15 for controlling and testing the AC contactor 4 of the product.

[0039] In a preferred embodiment, a bow-shaped equipment handle 17 made of 304 stainless steel is installed on the test fixture cover plate 16 for handling and moving the test fixture.

[0040] In a preferred embodiment, the test fixture panel 7 is provided with a terminal block 9 for connecting an external multimeter, and the product under test is connected to the terminal block 9. The voltage or current of the product under test is viewed using the multimeter.

[0041] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0042] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0043] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0044] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0045] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0046] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A test fixture for an optical transmission device, characterized by, The test tool is surrounded by two test tool side plates distributed left and right, test tool cover plates and test tool bottom plates distributed up and down, test tool face plates and test tool back plates distributed front and back; The test tool face plate is provided with a DB9 female head, an RJ45 adapter socket and a 12-core circular connector; The DB9 female head is connected with a test computer outside and with the RJ45 adapter socket inside, and the RJ45 adapter socket is connected with the product under test outside. The test tool bottom plate is provided with an AC contactor for power adaptability test of the product under test, which is connected with the 12-core circular connector inside and the product under test outside, and the 12-core circular connector is connected with a power module inside. TTL control signals are output by manually pressing the button switch on the test tool face plate, transmitted to the AC contactor in the test tool through the product under test, and used to control the closing of the AC contactor, while the working state of the product under test is observed when the AC contactor is in the closed state. When the AC contactor is controlled to be disconnected, the 220V AC power supply of the product under test is automatically switched to a 48V DC power supply, while the state of the product signal transmission and the AC contactor is observed, and the working state of the product under test is observed.

2. The test fixture for optical transmission equipment according to claim 1, wherein The two test tool side plates distributed left and right, the test tool cover plates and the test tool bottom plates distributed up and down, the test tool face plates and the test tool back plates distributed front and back are all made of bakelite.

3. The test fixture for optical transmission equipment according to claim 1, wherein The product under test includes product A and product B, the product A and the product B are connected through an optical fiber to transmit data, the product B is connected with the RJ45 adapter socket outside, and the product A is connected with the 12-core circular connector outside.

4. The test fixture for optical transmission equipment according to claim 3, wherein The test tool face plate is provided with an RJ45 network interface, one end of which is connected with a camera, and the other end is connected with the product B.

5. The test fixture for optical transmission equipment according to claim 1, wherein The test tool bottom plate is provided with an AC contactor control panel for controlling the closing or disconnection of the AC contactor.

6. The test fixture for optical transmission equipment according to claim 1, wherein The test tool bottom plate is provided with a power module, and the test tool back plate is provided with a power socket, which is connected with a power source, for supplying power to the product under test and supplying power to the test tool through the power module.

7. The test fixture for optical transmission equipment according to claim 1, wherein The test tool bottom plate is provided with a POE network cable power supply interface for supplying power to the camera.

8. The test fixture for optical transmission equipment according to claim 1, wherein The test tool cover plate is provided with an arc-shaped equipment handle for carrying and moving the test tool.

9. The test fixture for optical transmission equipment according to claim 1, wherein The test tool face plate is provided with a terminal for connecting an external multimeter, and the terminal is connected with the product under test.

Images