CN105915404B - The test macro of SpaceWire network link signal quality and the evaluation method of signal quality - Google Patents
The test macro of SpaceWire network link signal quality and the evaluation method of signal quality Download PDFInfo
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- CN105915404B CN105915404B CN201610086117.5A CN201610086117A CN105915404B CN 105915404 B CN105915404 B CN 105915404B CN 201610086117 A CN201610086117 A CN 201610086117A CN 105915404 B CN105915404 B CN 105915404B
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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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Abstract
The present invention provides a kind of test macros of SpaceWire network link signal quality, including SpaceWire network link level nature module, spaceborne network dress star test module and signal quality testing cassete, the spaceborne network dress star test module is connected to signal quality testing cassete by the SPACEWIRE network link level nature module, the signal quality testing cassete includes SpaceWire connector, signal circuit board, node device and signal circuit board on the SpaceWire connector connection star, draw signal wire measuring point on the signal circuit board.The invention also discloses the evaluation methods of signal quality.The present invention is transferred out the SpaceWire link DS four pairs of LVDS level signals encoded, by developing signal adapting device with oscillograph real-time detection differential signal waveform or signal eye diagram.
Description
Technical field
The present invention relates to the data interactions of SpaceWire information network, network engineering the field of test technology, and in particular, to
The test macro of SpaceWire network link signal quality and the evaluation method of signal quality.
Background technique
Along with being constantly progressive for China's Space Science and Technology, the application field of space technology is constantly expanded, spacecraft function
It is constantly promoted, this makes the quantity of the intensity of spacecraft internal unit system processes data and exchange information more and more huger, boat
Its task starts to face the challenge to complex data processing requirement, and the growth requirement of the spaceborne information exchange networking of spacecraft is increasingly
Urgently.
In existing engineering test, SpaceWire network and ground testing system do not have physical interface, can not examine in real time
Survey SpaceWire signal quality.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of SpaceWire network link signal qualities
Test macro and signal quality evaluation method.
According to an aspect of the present invention, a kind of test macro of SpaceWire network link signal quality is provided, it is special
Sign is, including SpaceWire network link level nature module, spaceborne network dress star test module and signal quality testing cassete,
The spaceborne network dress star test module is connected to signal quality by the SPACEWIRE network link level nature module and surveys
Box is tried, the signal quality testing cassete includes SpaceWire connector, signal circuit board, the SpaceWire connector connection
Node device and signal circuit board on star draw signal wire measuring point on the signal circuit board.
Preferably, the signal wire measuring point connection differential conversion equipment and oscillograph.
Preferably, the signal circuit board is equipped with banana bin and connect with SpaceWire signal lead, the signal electricity
Double-point double-throw switch is also equipped on the plate of road, the double-point double-throw switch connects SPACEWIRE signal wire.
According to another aspect of the present invention, it provides a kind of by above-mentioned SpaceWire network link signal quality
The evaluation method of test macro progress signal quality, characterized in that the signal quality testing cassete includes A node and B node,
A node and B node are set on the star, the evaluation method includes the following steps:
(1) the SpaceWire connecting cable of A node and B node on star is disconnected in the node side of signal quality box testing cassete；
(2) on the connector of the A node for the SpaceWire connecting cable access signal quality testing cassete that will be switched off；
(3) connector of signal quality testing cassete B node is connected with B node on star by test cable；
(4) A node, B node booting work on star, when SpaceWire link operates normally, are set using differential signal conversion
It is standby to be connected to Difference signal pair to be measured, signal waveform or signal eye diagram are tested by oscillograph.
Compared with prior art, the present invention have it is following the utility model has the advantages that
One kind is given in conjunction with DS coding characteristic by analysis SpaceWire physical layer signal level character
After SpaceWire network fills star, real-time detection PHY signal quality, i.e., by developing signal adapting device, by SpaceWire
Four pairs of LVDS level signals of link DS coding are transferred out, with oscillograph real-time detection differential signal waveform or signal eye diagram.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages 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 macro block diagram that the present invention constructs；
Fig. 4 is the DS signal eye diagram that the present invention surveys.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
As the SpaceWire network technology of cutting edge technology in current space flight, to meet high speed, high efficiency of transmission for main syllabus
Mark has good EMC characteristic, the functions such as error detection, abnormality processing, fault detection and recovery is supported, in spacecraft information
There is very important meaning in network application.
Referring to attached drawing 1, according to ECSS-E-50-12 consensus standard, SpaceWire network signal layer uses Data-Strobe
Coding (abbreviation DS coding) mode is made of, respectively Dout+, Dout- using LVDS level standard four pairs of differential pairs；Sout
+,Sout-；Din+, Din- and Sin+, Sin-.It is point-to-point by the realization of SpaceWire cable between SpaceWire network node
Communication, in the test of whole star, SpaceWire network and ground testing system do not have physical interface, can not real-time detection its transmission
Signal quality.
SpaceWire link is point-to-point transmission, Din+, Din- of A node by the Dout+ of connecting cable and B node,
Dout- is corresponding to be connected.After the network equipment fills star, bus monitor cannot be passed through as 1553B bus and be connected to ground test
System monitors the data interaction between node.For this problem, the present invention develops a SpaceWire signal quality test
Box is sealed in two connected A, B nodes by increasing a SpaceWire test cable.
Referring to attached drawing 2, SpaceWire signal quality testing cassete is by SpaceWire connector, signal measuring point and signal circuit
Board group at.SpaceWire physical layer electrical characteristic be LVDS level, it is contemplated that LVDS level to receiving and transmitting signal matching require compared with
Height, in the design of signal quality testing cassete, the signal wire of extraction is short as far as possible, and through experimental test, the signal line length of extraction is in 5cm
It is able to satisfy the requirement of SpaceWire link highest 200Mbps transmission rate below.
SpaceWire signal quality testing cassete is by SpaceWire connector, double-point double-throw switch, banana bin and signal
Circuit board composition, panel design are as shown in Figure 2.SpaceWire connector is for connecting node device on star；Signal circuit board
SpaceWire signal lead is realized with banana bin, and draws signal wire measuring point；Double-point double-throw switch is for control signal wire
On-off, can external Length discrepancy signal wire, DS signal time delay is extended to when examining or check each differential pair signal to SpaceWire link transmission
It influences.It says in a certain sense, signal quality testing cassete can regard the interface extended equipment of some node on star as.
Referring to attached drawing 3, tested using the signal quality testing cassete of SpaceWire signal quality test macro, SpaceWire
Cable, LVDS differential conversion equipment and oscillograph realize that the process of signal analysis method is as follows:
(1) the SpaceWire connecting cable of A node and B node on star is disconnected at B node end；
(2) the SpaceWire connecting cable access signal quality testing cassete that will be switched off is identified as the connector of " A node "
On；
(3) connector that signal quality testing cassete is identified as " B node " is connected with B node on star by test cable；
(4) A node, B node booting work on star, when SpaceWire link operates normally, are set using differential signal conversion
It is standby to be connected to Difference signal pair to be measured (such as Sin+ and Sin-), signal waveform or signal eye diagram are tested by oscillograph.
Referring to attached drawing 4, when the evaluation of SpaceWire signal eye diagram, that is, judge that SpaceWire signal eye diagram evaluation three is wanted
Element:
(1) eye subtended angle size.The element reflects SpaceWire signal magnitude, is the bigger the better.According to SpaceWire agreement
Standard, in order to enable receiving end correctly to parse, index request should be greater than 100mV；
(2) eye pouch size.The element reflects SpaceWire signal amplitude unstability, the smaller the better；
(3) how much is eye silk.The element reflects SpaceWire signal phase unstability, the smaller the better.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (4)
1. a kind of test macro of SpaceWire network link signal quality, which is characterized in that including SpaceWire lattice chain
Road level nature module, spaceborne network dress star test module and signal quality testing cassete, the spaceborne network fill star test module
Signal quality testing cassete, the signal quality testing cassete are connected to by the SpaceWire network link level nature module
Including SpaceWire connector, signal circuit board, node device and signal circuit on the SpaceWire connector connection star
Plate draws signal wire measuring point on the signal circuit board.
2. the test macro of SpaceWire network link signal quality according to claim 1, which is characterized in that described
Signal wire measuring point connects differential conversion equipment and oscillograph.
3. the test macro of SpaceWire network link signal quality according to claim 2, which is characterized in that described
Signal circuit board is equipped with banana bin and connect with SpaceWire signal wire, and it is double that double-pole is also equipped on the signal circuit board
Throw switch, the double-point double-throw switch connect SpaceWire signal wire.
4. a kind of test macro by SpaceWire network link signal quality as claimed in claim 2 or claim 3 carries out signal
The evaluation method of quality, which is characterized in that the signal quality testing cassete includes A node and B node, is set on the star
A node and B node, the evaluation method include the following steps:
(1) the SpaceWire connecting cable of A node and B node on star is disconnected at B node end；
(2) on the connector of the A node for the SpaceWire connecting cable access signal quality testing cassete that will be switched off；
(3) connector of signal quality testing cassete B node is connected with B node on star by test cable；
(4) A node, B node booting work are connect when SpaceWire link operates normally using differential signal conversion equipment on star
To Difference signal pair to be measured, signal waveform or signal eye diagram are tested by oscillograph.
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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 |
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| CN105915404B true CN105915404B (en) | 2019-01-08 |
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Families Citing this family (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 |
| CN109831349B (en) * | 2018-12-27 | 2021-02-09 | 中国空间技术研究院 | SpaceWire bus free topology bit error rate test system and method |
| CN110198186B (en) * | 2019-05-07 | 2020-09-25 | 北京航空航天大学 | High-speed SpaceWire optical fiber link test card capable of working offline |
| 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 |
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| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080123677A1 (en) * | 2006-08-31 | 2008-05-29 | Honeywell International Inc. | System management bus port switch |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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