CN218868230U

CN218868230U - Light transmission 1394B eye pattern testing device

Info

Publication number: CN218868230U
Application number: CN202223003452.4U
Authority: CN
Inventors: 张皓森; 张超; 叶有平; 杨舟; 李彧国; 张俊杰; 胡冀飞
Original assignee: Xian Flight Automatic Control Research Institute of AVIC
Current assignee: Xian Flight Automatic Control Research Institute of AVIC
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-04-14
Anticipated expiration: 2032-11-11

Abstract

The utility model belongs to the technical field of the avionics, a light transmission 1394B eye pattern testing arrangement is disclosed. The method comprises the following steps: the device comprises a bus tester, a test fixture, a photoelectric conversion fixture, tested equipment and an optical oscilloscope. The test signal output end of the bus tester is connected with the signal input end of the test fixture; the signal output end of the test fixture is connected with the electrical signal input end of the photoelectric conversion fixture; the optical signal output end of the photoelectric conversion clamp is connected with the optical signal input end of the tested equipment through an optical fiber; the optical signal output end of the tested equipment is connected with the optical signal input end of the optical oscillograph; and the trigger signal output end of the bus tester is connected with the trigger signal input end of the optical oscillograph. By introducing the low-cost photoelectric conversion clamp and the mature optical interface oscilloscope, the eye pattern test scheme of the optical transmission 1394B with low cost, short development period and high reliability is realized.

Description

Light transmission 1394B eye pattern testing device

Technical Field

The utility model belongs to the technical field of the avionics, especially, relate to a light passes 1394B eye pattern testing arrangement.

Background

The military 1394B bus technology is derived from a real-time data transmission high-speed interface provided by apple, and forms an IEEE1394B bus standard after being revised and improved for many times. Subsequently, SAE made a military 1394 protocol AS5643 based on 1394B in 2004, and a series of definitions and extensions were made to IEEE1394B to meet the requirements of military environment. The military 1394B bus technology is firstly applied to the American F35 airplane, then is applied to a new domestic airplane model in a large scale, becomes a symbolic technology of four generations of warplanes, and the reliability of the military 1394B bus technology is fully verified after years of practical application. The physical layer of the current military 1394B bus technology adopts an electric transmission medium, and the highest communication speed is 491.52Mbps.

With the application demand of the aviation management and avionics system for higher network transmission bandwidth and the mature development of optical interface devices and optical transmission technology, the military 1394B technology based on the optical medium physical layer becomes a new research direction. The light-transmitting 1394B gradually gains wide attention due to the advantages of strong anti-electromagnetic interference capability, weight reduction, speed increase and the like. Compared with the electric transmission 1394 technology, no mature test scheme aiming at indexes such as eye diagrams, bit error rates and the like of the optical transmission 1394B exists in the market at present, and the test indexes are important indexes for evaluating the performance of the optical transmission 1394 product. If a brand-new test system is developed for optical transmission, a long development period and capital investment are implied, and the application and development of the optical transmission 1394B technology are severely limited. Therefore, a highly reliable and low-cost test scheme and method for optical transmission 1394B is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the optical transmission 1394B eye pattern testing device is provided, the existing electric transmission 1394B eye pattern testing environment is modified, and the low-cost, short-development-period and high-reliability optical transmission 1394B eye pattern testing scheme is realized by introducing a low-cost photoelectric conversion clamp and a mature optical interface oscilloscope.

The technical scheme of the utility model: in order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize.

An optically transmissive 1394B eye test apparatus, the apparatus comprising at least: the device comprises a bus tester, a test fixture, a photoelectric conversion fixture, tested equipment and an optical wave indicator.

The test signal output end of the bus tester is connected with the signal input end of the test fixture;

the signal output end of the test fixture is connected with the electrical signal input end of the photoelectric conversion fixture;

the optical signal output end of the photoelectric conversion clamp is connected with the optical signal input end of the tested equipment through an optical fiber;

the optical signal output end of the tested equipment is connected with the optical signal input end of the optical oscillograph;

and the trigger signal output end of the bus tester is connected with the trigger signal input end of the optical oscillograph.

The utility model discloses technical scheme's characteristics and further improvement do:

(1) The bus tester is used for sending Tone signals to the test fixture and periodically sending trigger signals to the optical oscillograph.

(2) The test fixture is used for forwarding the Tone signal received from the bus tester to the photoelectric conversion fixture.

(3) The photoelectric conversion clamp is used for converting the electric signal into an optical signal and forwarding the optical signal to the tested equipment.

(4) The tested device is used for establishing connection after receiving the Tone signal and sending the coded signal to the optical oscillograph.

(5) The optical oscilloscope is used for displaying the received optical signal so as to acquire an optical transmission 1394B eye diagram.

The utility model discloses technical scheme reforms transform current telex 1394 eye pattern test environment, has realized low-cost, short development cycle, the high reliable light through introducing low-cost photoelectric conversion anchor clamps, ripe optical interface oscilloscope and has passed 1394B's eye pattern test scheme. The utility model discloses a light transmission 1394 eye pattern test flow is basically the same with telex 1394, and test software and most test equipment are all general, and the tester need not professional training and can get on the hand fast, has shortened product development and test cycle, has reduced manufacturing cost.

Drawings

FIG. 1 is a schematic diagram of a conventional 1394B eye diagram testing apparatus;

fig. 2 is a schematic view of the optical transmission 1394B eye pattern testing apparatus provided by the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment of the utility model provides a pair of required test equipment of light transmission 1394B eye pattern testing arrangement includes 1394B bus tester, light oscillograph, test fixture, photoelectric conversion anchor clamps and is surveyed unit and test host computer.

Use the signal of telecommunication test means as the basis, the difference is the utility model discloses an electrical test signal conversion with bus tester output is light signal for equipment under test's test is surveyed in the light signal input to the optical oscilloscope of light transmission 1394B equipment output simultaneously. The bus tester provides a trigger signal for the oscilloscope, and meanwhile, the upper computer test software is communicated with the oscilloscope for oscilloscope configuration. During the test, special test fixture is connected to the bus tester, sends the tone signal in order to initiate the connection process to equipment under test, and is different with the signal of telecommunication test, the utility model discloses the signal of telecommunication access self-grinding's photoelectric conversion anchor clamps with test fixture output is connected with equipment under test again, and equipment under test will receive and transmit test signal. And finally, connecting the optical signal output by the tested equipment with the optical oscillograph, observing and recording the eye pattern data of the optical signal on the optical oscillograph, and calculating the eye pattern index.

The eye pattern test is the key index of the signal quality of the sign send signal of stipulating in 1394B-2008 specification, for making the utility model discloses well biography 1394B eye pattern test implementation process and achievement are easily known, it is following to the utility model discloses further explain.

As shown in fig. 1, it is a conventional 1394 electric eye diagram testing platform. On the basis of the test, the optical transmission equipment is tested by introducing a photoelectric conversion module and an optical oscilloscope through a test idea of the electric transmission 1394B. As shown in fig. 2, for the utility model provides a light passes 1394 eye pattern test platform, test platform includes the bus tester, light oscilloscope, test fixture, photoelectric conversion anchor clamps and by the unit of being surveyed and test host computer.

The implementation flow is as follows:

(1) And the upper computer is connected with the bus tester and the optical oscillograph, so that the normal communication between the bus tester and the upper computer software is ensured.

(2) And connecting the trigger signal output by the bus tester with the trigger signal input port of the optical oscillograph.

(3) The bus tester is connected with the test fixture, and particularly, in the optical transmission test, the test fixture is connected with the photoelectric conversion fixture, and the electric signals are converted into optical signals to be connected with the tested equipment.

(4) Compared with fig. 1 and fig. 2, in the teletype test, the method directly connects the optical signal output by the tested device to the input channel of the optical oscilloscope, unlike the teletype test that the tested signal is received by the oscilloscope probe.

(5) And executing the test through upper computer software, observing and recording the eye pattern parameters in the optical oscillograph, and realizing the eye pattern test.

The utility model discloses technical scheme reforms transform present electricity transmission 1394 eye pattern test environment, has realized low-cost, short development cycle, the high reliable light transmission 1394B's eye pattern test scheme through introducing low-cost photoelectric conversion anchor clamps, ripe optical interface oscilloscope. The utility model discloses a light transmission 1394 eye pattern test flow is basically the same with telex 1394, and test software and most test equipment are all general, and the tester need not professional training and can get on the hand fast, has shortened product development and test cycle, has reduced manufacturing cost.

Claims

1. An optically transmissive 1394B eye pattern testing apparatus, said apparatus comprising at least: a bus tester, a test fixture, a photoelectric conversion fixture, a tested device and an optical wave indicator,

2. The optically transmissive 1394B eye pattern test apparatus of claim 1,

the bus tester is used for sending Tone signals to the test fixture and periodically sending trigger signals to the optical oscillograph.

3. The optically transmissive 1394B eye pattern testing apparatus of claim 2, wherein the test fixture is configured to forward Tone signals received from the bus tester to the optical-to-electrical conversion fixture.

4. The device according to claim 3, wherein the optical transceiver 1394B eye pattern testing apparatus comprises an optical conversion fixture for converting the electrical signal into an optical signal and forwarding the optical signal to the device under test.

5. The optically transmissive 1394B eye pattern testing apparatus of claim 4, wherein the device under test is configured to establish a connection after receiving the Tone signal and send the encoded signal to the optical oscilloscope.

6. The apparatus of claim 5, wherein the optical oscilloscope is configured to display the received optical signal to obtain an optical transmitted 1394B eye diagram.