CN105915404A - SpaceWire network link signal quality test system and signal quality evaluation method - Google Patents
SpaceWire network link signal quality test system and signal quality evaluation method Download PDFInfo
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- CN105915404A CN105915404A CN201610086117.5A CN201610086117A CN105915404A CN 105915404 A CN105915404 A CN 105915404A CN 201610086117 A CN201610086117 A CN 201610086117A CN 105915404 A CN105915404 A CN 105915404A
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- spacewire
- signal
- signal quality
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- network link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- Environmental & Geological Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Small-Scale Networks (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention provides a SpaceWire network link signal quality test system. The system comprises a SpaceWire network link level feature module, a space-borne satellite mounting test module and a signal quality test box, wherein the space-borne satellite mounting test module is connected with the quality test box through the SpaceWire network link level feature module, the signal quality test box comprises a SpaceWire connector and a signal circuit board, the SpaceWire connector is connected with a satellite node device and the signal circuit board, and a signal line test point is led out from the signal circuit board. The invention further discloses a signal quality evaluation method. According to the invention, through development of a signal switching apparatus, four DS-encoded LVDS level signals of a SpaceWire link are switched, and difference signal waveforms or signal eye patterns are detected in real time by use of an oscilloscope.
Description
Technical field
The present invention relates to SpaceWire information network data interaction, network engineering technical field of measurement and test, specifically,
Relate to test system and the evaluation methodology of signal quality of SpaceWire network link signal quality.
Background technology
Along with the continuous progress of China's Space Science and Technology, the application of space technology is constantly expanded, spacecraft function
The most constantly promoting, the quantity of this intensity making spacecraft internal unit system processes data and exchange information is increasingly
Huge, space mission starts to face the challenge that complex data processes requirement, the spacecraft spaceborne information Internet
Growth requirement the most urgent.
In existing engineering test, SpaceWire network and ground testing system do not have physical interface, it is impossible to real
Time detection SpaceWire signal quality.
Summary of the invention
For defect of the prior art, it is an object of the invention to provide a kind of SpaceWire network link signal product
The test system of matter and the evaluation methodology of signal quality.
According to an aspect of the present invention, it is provided that the test system of a kind of SpaceWire network link signal quality, its
Feature is, surveys including SpaceWire network link level nature module, spaceborne network dress star test module and signal quality
Examination box, described spaceborne network dress star test module is connected to letter by described SPACEWIRE network link level nature module
Number attribute test box, described signal quality testing cassete includes SpaceWire adapter, signal circuit board, described
SpaceWire adapter connects node device and signal circuit board on star, draws holding wire and survey on described signal circuit board
Point.
Preferably, described holding wire measuring point connects differential conversion equipment and oscillograph.
Preferably, described signal circuit board is provided with banana bin and is connected with SpaceWire signal lead, described signal electricity
Being also equipped with double-point double-throw switch on the plate of road, described double-point double-throw switch connects SPACEWIRE holding wire.
According to another aspect of the present invention, it is provided that a kind of by above-mentioned SpaceWire network link signal quality
Test system carries out the evaluation methodology of signal quality, it is characterized in that, described signal quality testing cassete includes A node and B joint
Point, is set with A node and B node on described star, and described evaluation methodology comprises the steps:
(1) on the node side disconnection star of signal quality box testing cassete, A node is connected cable with the SpaceWire of B node；
(2) SpaceWire that will be switched off connects on the adapter of the A node that cable accesses signal quality testing cassete；
(3) by test cable, the adapter of signal quality testing cassete B node is connected with B node on star；
(4) A node, B node start work on star, when SpaceWire link is properly functioning, uses differential signal conversion
Equipment is connected to Difference signal pair to be measured, by oscillograph test signal waveform or signal eye diagram.
Compared with prior art, the present invention has a following beneficial effect:
By analyzing SpaceWire physical layer signal level character, in conjunction with DS coding characteristic, give one
After SpaceWire network dress star, detect PHY signal quality in real time, i.e. by developing signal adapting device, will
Four pairs of LVDS level signals of SpaceWire link DS coding are transferred out, detect differential signal in real time with oscillograph
Waveform or signal eye diagram.
Accompanying drawing explanation
The detailed description made non-limiting example with reference to the following drawings by reading, other of the present invention is special
Levy, purpose and advantage will become more apparent upon:
Fig. 1 is SpaceWire consensus standard physical layer signal contact schematic diagram；
Fig. 2 is signal quality testing cassete design frame chart of the present invention；
Fig. 3 is the signal quality test system block diagram that the present invention builds；
Fig. 4 is the DS signal eye diagram that the present invention surveys.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following example will assist in those skilled in the art
Member is further appreciated by the present invention, but limits the present invention the most in any form.It should be pointed out that, the common skill to this area
For art personnel, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement.These broadly fall into
Protection scope of the present invention.
As the SpaceWire network technology of cutting edge technology in current space flight, based on satisfied high speed, high efficiency of transmission
Want target, there is good EMC characteristic, support the functions such as error detection, abnormality processing, fault detect and recovery,
Very important meaning is had in spacecraft information network is applied.
Seeing accompanying drawing 1, according to ECSS-E-50-12 consensus standard, SpaceWire network signal layer uses
Data-Strobe coding (being called for short DS coding) mode, uses LVDS level standard, is made up of four pairs of differential pairs,
It is respectively Dout+, Dout-；Sout+、Sout-；Din+, Din-and Sin+, Sin-.SpaceWire net
It is to realize point-to-point communication by SpaceWire cable between network node, when whole star is tested, SpaceWire network
Physical interface is not had, it is impossible to its transmission signal quality of detection in real time with ground testing system.
SpaceWire link is point-to-point transmission, and Din+, Din-of A node is by connecting cable and B node
Dout+, Dout-correspondence is connected.After network equipment dress star, it is impossible to pass through bus monitoring as 1553B bus
Device is connected to ground testing system to the data interaction monitoring between node.For this difficult problem, the present invention develops one
SpaceWire signal quality testing cassete, by increasing a SpaceWire test cable, is sealed in two phases
A even, B node.
Seeing accompanying drawing 2, SpaceWire signal quality testing cassete is by SpaceWire adapter, signal measuring point and letter
Number circuit board composition.SpaceWire physical layer electrical characteristic is LVDS level, it is contemplated that LVDS level is to transmitting-receiving
Signal Matching requires higher, and when signal quality testing cassete designs, the holding wire of extraction is the shortest, surveys through test
Examination, the holding wire length of extraction can meet SpaceWire link the highest 200Mbps transfer rate at below 5cm
Requirement.
SpaceWire signal quality testing cassete by SpaceWire adapter, double-point double-throw switch, banana bin and
Signal circuit board forms, and its panel designs as shown in Figure 2.SpaceWire adapter is used for connecting node on star and sets
Standby；Signal circuit board and banana bin realize SpaceWire signal lead, and draw holding wire measuring point；Double-pole is double
Throw switch for the break-make of control signal wire, can external Length discrepancy holding wire, extend to DS when examining or check each differential pair signal
The signal time delay impact on SpaceWire link transmission.Saying in a certain sense, signal quality testing cassete can be regarded as
The interface extended equipment of certain node on star.
See accompanying drawing 3, utilize SpaceWire signal quality to test the signal quality testing cassete of system, SpaceWire
Test cable, LVDS differential conversion equipment and oscillograph, it is achieved the flow process of signal analysis method is as follows:
(1) disconnect A node on star at B node end and be connected cable with the SpaceWire of B node；
(2) SpaceWire that will be switched off connects cable access signal quality testing cassete and is designated the company of " A node "
Connect on device；
(3) by test cable, signal quality testing cassete is designated adapter and the B node on star of " B node "
It is connected；
(4) A node, B node start work on star, when SpaceWire link is properly functioning, uses difference letter
Number conversion equipment is connected to Difference signal pair (such as Sin+ and Sin-) to be measured, tests signal waveform by oscillograph
Or signal eye diagram.
See accompanying drawing 4, during the evaluation of SpaceWire signal eye diagram, i.e. judge that SpaceWire signal eye diagram is evaluated
Three elements:
(1) eye subtended angle size.This key element reflection SpaceWire signal magnitude, is the bigger the better.According to SpaceWire
Consensus standard, in order to make receiving terminal correctly to resolve, index request should be greater than 100mV；
(2) eye pouch size.This key element reflection SpaceWire signal amplitude unstability, the smaller the better；
(3) eye silk is how many.This key element reflection SpaceWire signal phase unstability, the smaller the better.
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in
Stating particular implementation, those skilled in the art can make various deformation or amendment within the scope of the claims,
This has no effect on the flesh and blood of the present invention.
Claims (4)
1. the test system of a SpaceWire network link signal quality, it is characterised in that include SpaceWire
Network link level nature module, spaceborne network dress star test module and signal quality testing cassete, described spaceborne network dress star
Test module is connected to signal quality testing cassete, described signal by described SPACEWIRE network link level nature module
Attribute test box includes SpaceWire adapter, signal circuit board, and described SpaceWire adapter connects node on star
Equipment and signal circuit board, draw holding wire measuring point on described signal circuit board.
The test system of SpaceWire network link signal quality the most according to claim 1, it is characterised in that
Described holding wire measuring point connects differential conversion equipment and oscillograph.
The test system of SpaceWire network link signal quality the most according to claim 2, it is characterised in that
Described signal circuit board is provided with banana bin and is connected with SpaceWire signal lead, and described signal circuit board is also installed
Having double-point double-throw switch, described double-point double-throw switch connects SPACEWIRE holding wire.
4. one kind is entered by the test system of SpaceWire network link signal quality as claimed in claim 2 or claim 3
The evaluation methodology of row signal quality, it is characterised in that described signal quality testing cassete includes A node and B node, in institute
Stating and be set with A node and B node on star, described evaluation methodology comprises the steps:
(1) on the node side disconnection star of signal quality box testing cassete, A node is connected cable with the SpaceWire of B node；
(2) SpaceWire that will be switched off connects on the adapter of the A node that cable accesses signal quality testing cassete；
(3) by test cable, the adapter of signal quality testing cassete B node is connected with B node on star；
(4) A node, B node start work on star, when SpaceWire link is properly functioning, uses differential signal conversion
Equipment is connected to Difference signal pair to be measured, by oscillograph test signal waveform or signal eye diagram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610086117.5A CN105915404B (en) | 2016-02-15 | 2016-02-15 | The test macro of SpaceWire network link signal quality and the evaluation method of signal quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086117.5A CN105915404B (en) | 2016-02-15 | 2016-02-15 | The test macro of SpaceWire network link signal quality and the evaluation method of signal quality |
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| CN105915404A true CN105915404A (en) | 2016-08-31 |
| CN105915404B CN105915404B (en) | 2019-01-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546848A (en) * | 2016-10-21 | 2017-03-29 | 上海卫星工程研究所 | Spaceborne information network Electro-static Driven Comb engineering test system |
| CN109831349A (en) * | 2018-12-27 | 2019-05-31 | 中国空间技术研究院 | A kind of SpaceWire bus free topology error rate test system and method |
| CN110198186A (en) * | 2019-05-07 | 2019-09-03 | 北京航空航天大学 | It is a kind of can off-line working high speed SpaceWire optical fibre link circuit testing card |
| CN112291110A (en) * | 2020-09-29 | 2021-01-29 | 北京空间飞行器总体设计部 | SpaceWire network interface bypass detection device |
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| US20080123677A1 (en) * | 2006-08-31 | 2008-05-29 | Honeywell International Inc. | System management bus port switch |
| CN103076557A (en) * | 2012-11-30 | 2013-05-01 | 北京时代民芯科技有限公司 | Testing method of single event functional interruption of Spacewire circuit |
| CN103501238A (en) * | 2013-09-09 | 2014-01-08 | 中国航天科技集团公司第五研究院第五一三研究所 | Plug and play method based on SpaceWire |
| CN105072040A (en) * | 2015-07-31 | 2015-11-18 | 上海卫星工程研究所 | Efficient satellite SpaceWire Plug-and-Play (PnP) network topology construction method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080123677A1 (en) * | 2006-08-31 | 2008-05-29 | Honeywell International Inc. | System management bus port switch |
| CN103076557A (en) * | 2012-11-30 | 2013-05-01 | 北京时代民芯科技有限公司 | Testing method of single event functional interruption of Spacewire circuit |
| CN103501238A (en) * | 2013-09-09 | 2014-01-08 | 中国航天科技集团公司第五研究院第五一三研究所 | Plug and play method based on SpaceWire |
| CN105072040A (en) * | 2015-07-31 | 2015-11-18 | 上海卫星工程研究所 | Efficient satellite SpaceWire Plug-and-Play (PnP) network topology construction method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546848A (en) * | 2016-10-21 | 2017-03-29 | 上海卫星工程研究所 | Spaceborne information network Electro-static Driven Comb engineering test system |
| CN109831349A (en) * | 2018-12-27 | 2019-05-31 | 中国空间技术研究院 | A kind of SpaceWire bus free topology error rate test system and method |
| CN110198186A (en) * | 2019-05-07 | 2019-09-03 | 北京航空航天大学 | It is a kind of can off-line working high speed SpaceWire optical fibre link circuit testing card |
| CN112291110A (en) * | 2020-09-29 | 2021-01-29 | 北京空间飞行器总体设计部 | SpaceWire network interface bypass detection device |
| CN112291110B (en) * | 2020-09-29 | 2021-12-31 | 北京空间飞行器总体设计部 | SpaceWire network interface bypass detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105915404B (en) | 2019-01-08 |
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