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 PDF

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CN105915404A
CN105915404A CN 201610086117 CN201610086117A CN105915404A CN 105915404 A CN105915404 A CN 105915404A CN 201610086117 CN201610086117 CN 201610086117 CN 201610086117 A CN201610086117 A CN 201610086117A CN 105915404 A CN105915404 A CN 105915404A
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signal
spacewire
signal quality
node
test
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CN 201610086117
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Chinese (zh)
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董瑶海
王震
沈毅力
朱振华
杨炳轲
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上海卫星工程研究所
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing packet switching networks
    • H04L43/08Monitoring based on specific metrics

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

SpaceWi re网络链路信号品质的测试系统及信号品质的评价方法 Network link signal quality SpaceWi re test system and method for evaluating the quality of the signal

技术领域 FIELD

[0001 ]本发明涉及SpaceWire信息网络数据交互、网络工程测试技术领域,具体地,涉及SpaceWire网络链路信号品质的测试系统及信号品质的评价方法。 [0001] The present invention relates to a data exchange network information SpaceWire network engineering technical field testing, in particular, relates to a test system and a signal quality of SpaceWire network link signal quality evaluation method.

背景技术 Background technique

[0002]伴随着我国航天科技的不断进步,航天技术的应用领域不断拓展,航天器功能也不断提升,这使得航天器内部设备系统处理数据的强度和交换信息的数量越来越庞大,航天任务开始面临对复杂数据处理要求的挑战,航天器星载信息交互网络化的发展需求日益迫切。 [0002] Along with the continuous progress of China's space technology, space technology applications continues to expand, the spacecraft functions are rising, which makes the strength of the spacecraft system of internal device data processing and exchange of increasingly large amount of information, space mission begin to face the challenges of complex data processing requirements, spacecraft onboard information exchange network of increasingly urgent development needs.

[0003]在现有的工程测试中,SpaceWire网络与地面测试系统没有物理接口,无法实时检测SpaceWire信号品质。 [0003] In the existing engineering tests, SpaceWire network and ground test system with no physical interfaces, real-time signal quality can not be detected SpaceWire.

发明内容 SUMMARY

[0004]针对现有技术中的缺陷,本发明的目的是提供一种SpaceWire网络链路信号品质的测试系统及信号品质的评价方法。 [0004] For the prior art drawbacks, an object of the present invention is to provide a SpaceWire link signal quality evaluation method of the network system and a signal quality test.

[0005]根据本发明的一个方面,提供一种SpaceWire网络链路信号品质的测试系统,其特征是,包括SpaceWire网络链路电平特性模块、星载网络装星测试模块和信号品质测试盒,所述星载网络装星测试模块通过所述SPACEWIRE网络链路电平特性模块连接至信号品质测试盒,所述信号品质测试盒包括SpaceWire连接器、信号电路板,所述SpaceWire连接器连接星上节点设备与信号电路板,在所述信号电路板上引出信号线测点。 [0005] In accordance with one aspect of the invention, there is provided a SpaceWire network link signal quality test system, characterized in that, comprising a SpaceWire network link module level characteristics, spaceborne satellite network apparatus test modules and signal quality test cartridge, the spaceborne satellite network means connected to the signal quality test module via said cartridge SPACEWIRE network link level characteristics module, the signal quality SpaceWire cartridge comprising a connector, the signal circuit board, the connector connecting the star SpaceWire circuit board and the signal node device, the signal extraction circuit board test point a signal line.

[0006]优选地,所述信号线测点连接差分转换设备及示波器。 [0006] Preferably, the signal lines connecting measurement points and the differential conversion apparatus oscilloscope.

[0007]优选地,所述信号电路板安装有香蕉插座与SpaceWire信号走线连接,所述信号电路板上还安装有双刀双掷开关,所述双刀双掷开关连接SPACEWIRE信号线。 [0007] Preferably, the signal circuit board mounted with banana jack SpaceWire signal traces connected to a signal circuit board is also equipped with double pole double throw switch, the DPDT switch is connected SPACEWIRE signal line.

[0008]根据本发明的另一个方面,提供一种通过上述的SpaceWire网络链路信号品质的测试系统进行信号品质的评价方法,其特征是,所述信号品质测试盒包括A节点和B节点,在所述星上设定有A节点和B节点,所述评价方法包括如下步骤: [0008] According to another aspect of the present invention, there is provided a method of evaluating the quality of a signal via the network SpaceWire link signal quality testing system, wherein said signal quality test comprises a cartridge Node A and Node B, are set in the satellite node A and node B, the evaluation method comprising the steps of:

[0009] (I)在信号品质盒测试盒的节点端断开星上A节点与B节点的SpaceWire连接电缆; [0009] (I) A disconnect the star node and an end node in the Node B the signal quality of SpaceWire cassette cartridge connecting cable;

[0010] (2)将断开的SpaceWire连接电缆接入信号品质测试盒的A节点的连接器上; A node connector [0010] (2) connecting the disconnected cables SpaceWire access signal quality on the cartridge;

[0011] (3)通过测试电缆将信号品质测试盒B节点的连接器与星上B节点相连; [0011] (3) by the test cable connector signal quality test cell Node B and the Node B connected to the star;

[0012] (4)星上A节点、B节点开机工作,SpaceWire链路正常运行时,使用差分信号转换设备接至待测的差分信号对,通过示波器测试信号波形或信号眼图。 [0012] (4) on the star node A, B node start work, the SpaceWire link during normal operation, using a differential signal converting apparatus connected to the differential signal pairs tested, a test signal waveform by the oscilloscope or the signal eye.

[0013]与现有技术相比,本发明具有如下的有益效果: [0013] Compared with the prior art, the present invention has the following advantages:

[0014] 通过分析SpaceWire物理层信号电平特征,结合DS编码特点,给出了一种SpaceWire网络装星后,实时检测物理层信号品质,即通过研制信号转接装置,将SpaceWire链路DS编码的四对LVDS电平信号转接出,用示波器实时检测差分信号波形或信号眼图。 After [0014] By analyzing the characteristics SpaceWire level physical layer signal, DS coding binding characteristics, gives a SpaceWire star network installed, the physical layer signal quality detected in real time, i.e., by development of the signal switching means, the DS coding SpaceWire link four pairs of the LVDS level switching signal, the differential signal detected by real-time oscilloscope or a waveform signal eye.

附图说明 BRIEF DESCRIPTION

[0015]通过阅读参照以下附图对非限制性实施例所作的详细描述,本发明的其它特征、目的和优点将会变得更明显: [0015] By reading the following detailed description of non-limiting embodiments given with reference to the following figures, other features of the present invention, objects and advantages will become more apparent:

[0016]图1为SpaceWire协议标准物理层信号接点示意图; [0016] FIG. 1 is a schematic diagram of the signal contacts SpaceWire standard protocol physical layer;

[0017]图2为本发明信号品质测试盒设计框图; [0017] FIG. 2 is a block diagram of a signal quality test cassette is designed invention;

[0018]图3为本发明构建的信号品质测试系统框图; [0018] FIG 3 a block diagram of a signal quality test system of the present invention is constructed;

[0019]图4为本发明实测的DS信号眼图。 [0019] FIG. 4 DS signal measured eye diagram of the present invention.

具体实施方式 detailed description

[0020]下面结合具体实施例对本发明进行详细说明。 Specific embodiments of the present invention will be described in detail [0020] below in conjunction. 以下实施例将有助于本领域的技术人员进一步理解本发明,但不以任何形式限制本发明。 The following examples will assist those skilled in the art a further understanding of the invention, but do not limit the present invention in any way. 应当指出的是,对本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进。 It should be noted that one of ordinary skill in the art, without departing from the spirit of the present invention, further modifications and changes may be made. 这些都属于本发明的保护范围。 All these fall within the scope of the present invention.

[0021 ]作为当前航天中前沿技术的SpaceWire网络技术,以满足高速、高效传输为主要目标,具有良好的EMC特性,支持错误检测、异常处理、故障检测和恢复等功能,在航天器信息网络应用中有着非常重要的意义。 [0021] As the current space in the cutting-edge technology SpaceWire network technologies to meet high-speed, efficient transmission of the main objective, has good EMC characteristic supports error detection, exception handling, fault detection and recovery functions, used in aerospace information network It has a very important significance.

[0022] 参见附图1,根据ECSS-E-50-12协议标准,SpaceWire网络信号层采用Data-Strobe编码(简称DS编码)方式,采用LVDS电平标准,由四对差分对组成,分别为Dout+、Dout-;Sout+、Sout-; Din+、Din_及Sin+、Sin-。 [0022] Referring to FIG. 1, according to ECSS-E-50-12 standard protocol, the SpaceWire network signal layer using Data-Strobe encoding (encoding abbreviated DS) mode, the LVDS level criteria, the four pairs of differential pairs, respectively, Dout +, Dout-; Sout +, Sout-; Din +, Din_ and Sin +, Sin-. SpaceWire网络节点间是通过SpaceWire电缆实现点对点通信,在整星测试时,SpaceWire网络与地面测试系统没有物理接口,无法实时检测其传输信号品质。 SpaceWire between nodes is achieved by a network peer communication cable SpaceWire, when the entire star test, the test system and terrestrial SpaceWire no physical interface, the signal transmission quality can not be detected in real time.

[0023] SpaceWire链路是点对点传输,A节点的Din+、Din-通过连接电缆与B节点的Dout+、Dout-对应相连。 [0023] SpaceWire link is a point to point transmission, Din A node +, Din- Node B via the connection cable Dout +, is connected to the corresponding Dout-. 在网络设备装星后,不能像1553B总线那样通过总线监视器接至地面测试系统来监视节点之间的数据交互。 After loading star network device, not like as 1553B bus monitor connected to the ground via a bus system to monitor the test data exchange between nodes. 针对这一难题,本发明研制一个SpaceWire信号品质测试盒,通过增加一根SpaceWire测试电缆,将其串入两个相连的A、B节点。 For this problem, the present inventors have developed a test cell SpaceWire signal quality by increasing a SpaceWire test cable, which is connected in series with two A, B node.

[0024] 参见附图2,SpaceWire信号品质测试盒由SpaceWire连接器、信号测点和信号电路板组成。 [0024] Referring to figures 2, SpaceWire SpaceWire signal quality by the cartridge connector, the signal and the signal measuring point circuit boards. SpaceWire物理层电气特性为LVDS电平,考虑到LVDS电平对收发信号匹配性要求较高,在信号品质测试盒设计时,引出的信号线尽量短,经试验测试,引出的信号线长度在5cm以下能满足SpaceWire链路最高200Mbps传输速率的要求。 SpaceWire electrical characteristics of the physical layer LVDS level, taking into account the higher level matching LVDS transceiver requirement signal, the signal quality cartridge design, the signal line leads as short as possible, the experimental test, the length of the signal lines drawn in 5cm the following can meet the requirements of the highest transmission rate of 200Mbps SpaceWire link.

[0025] SpaceWire信号品质测试盒由SpaceWire连接器、双刀双掷开关、香蕉插座和信号电路板组成,其面板设计如图2所示。 [0025] SpaceWire SpaceWire signal quality by a cartridge connector, double-pole double-throw switch, and banana jack signal circuit boards, which panel design shown in Figure 2. SpaceWire连接器用于连接星上节点设备;信号电路板和香蕉插座实现SpaceWire信号走线,并引出信号线测点;双刀双掷开关用于控制信号线的通断,可外接不等长信号线,考查各差分对信号时延及DS信号时延对SpaceWire链路传输的影响。 SpaceWire connector for the star node device; and a signal circuit board to achieve the banana jack SpaceWire signal traces, and a signal line leads measuring point; double pole double throw switch for on-off control signal line, a signal line can be connected unequal Effect test delay each differential signal DS and the signal delay on SpaceWire link transmission. 从一定意义上说,信号品质测试盒可看作星上某个节点的接口延长设备。 In a certain sense, the signal quality test kit can be seen as a star on the interface to extend the device node.

[0026] 参见附图3,利用SpaceWire信号品质测试系统的信号品质测试盒、SpaceWire测试电缆、LVDS差分转换设备及示波器,实现信号分析方法的流程如下: [0026] Referring to Figure 3, the test system using the signal quality SpaceWire signal quality test cartridge, the test cable SpaceWire, LVDS differential conversion apparatus and oscilloscope, for signal analysis process is as follows:

ί0027] (I)在B节点端断开星上A节点与B节点的SpaceWire连接电缆; ί0027] (I) Disconnect the star node A Node B Node B at the end of the connecting cable SpaceWire;

[0028] (2)将断开的SpaceWire连接电缆接入信号品质测试盒标识为“A节点”的连接器上; [0028] (2) connecting the disconnected cables SpaceWire access signal quality on the cartridge identified as "A node" connector;

[0029] (3)通过测试电缆将信号品质测试盒标识为“B节点”的连接器与星上B节点相连; [0029] (3) the quality of the test signal cable cartridge identified as "Node B" in connection with Node B connected to the star;

[0030] (4)星上A节点、B节点开机工作,SpaceWire链路正常运行时,使用差分信号转换设备接至待测的差分信号对(如Sin+和Sin-),通过示波器测试信号波形或信号眼图。 [0030] (4) on the star node A, B node start work, the SpaceWire link during normal operation, using a differential signal converting apparatus connected to the differential signal to be measured (e.g., Sin + and Sin-), a signal waveform by the oscilloscope or signal eye.

[0031] 参见附图4,SpaceWire信号眼图的评价时,即判断SpaceWire信号眼图评价三要素: [0031] Referring to Figure 4 when evaluated SpaceWire signal eye, i.e. determination signal eye evaluation SpaceWire three elements:

[0032] (I)眼张角大小。 [0032] (I) the size of the opening angle of the eye. 该要素反映SpaceWire信号大小,越大越好。 The elements reflect SpaceWire signal size, the bigger the better. 根据SpaceWire协议标准,为了使接收端能正确解析,指标要求应大于I OOmV; The SpaceWire standard protocol, in order that the receiver can correctly resolve, the indicator should be greater than I OOmV;

[0033] (2)眼袋大小。 [0033] (2) the size of the bags under the eyes. 该要素反映SpaceWire信号幅度不稳定性,越小越好; The amplitude of the signal element reflects SpaceWire instability, as small as possible;

[0034] (3)眼丝多少。 [0034] (3) the number of silk eye. 该要素反映SpaceWire信号相位不稳定性,越小越好。 The SpaceWire element reflects the signal phase instability, the smaller the better.

[0035]以上对本发明的具体实施例进行了描述。 [0035] Specific examples of the above embodiments of the present invention have been described. 需要理解的是,本发明并不局限于上述特定实施方式,本领域技术人员可以在权利要求的范围内做出各种变形或修改,这并不影响本发明的实质内容。 Is to be understood that the present invention is not limited to the particular embodiments, those skilled in the art can make various changes and modifications within the scope of the appended claims, this does not affect the substance of the present invention.

Claims (4)

  1. 1.一种SpaceWire网络链路信号品质的测试系统,其特征在于,包括SpaceWire网络链路电平特性模块、星载网络装星测试模块和信号品质测试盒,所述星载网络装星测试模块通过所述SPACEWIRE网络链路电平特性模块连接至信号品质测试盒,所述信号品质测试盒包括SpaceWire连接器、信号电路板,所述SpaceWire连接器连接星上节点设备与信号电路板,在所述信号电路板上引出信号线测点。 A SpaceWire network link signal quality test system comprising SpaceWire network link module level characteristics, spaceborne satellite network apparatus test modules and signal quality test cartridge, the onboard network test module mounted star via the network link level characteristic SPACEWIRE module to signal quality test cartridge, the test cartridge comprising a signal quality SpaceWire connector, the signal circuit board, the connector SpaceWire star node device connected to the signal board in the said signal extraction circuit board test point a signal line.
  2. 2.根据权利要求1所述的SpaceWire网络链路信号品质的测试系统,其特征在于,所述信号线测点连接差分转换设备及示波器。 The SpaceWire network link signal quality testing system according to claim 1, wherein said signal line connecting measurement points and the differential conversion apparatus oscilloscope.
  3. 3.根据权利要求2所述的SpaceWire网络链路信号品质的测试系统,其特征在于,所述信号电路板安装有香蕉插座与SpaceWire信号走线连接,所述信号电路板上还安装有双刀双掷开关,所述双刀双掷开关连接SPACEWIRE信号线。 The network SpaceWire link signal quality testing system according to claim 2, wherein said signal circuit board mounted with banana jack SpaceWire signal traces connected to the signal pole mounted circuit board further double throw switch, the DPDT switch is connected SPACEWIRE signal line.
  4. 4.一种通过如权利要求2或3所述的SpaceWire网络链路信号品质的测试系统进行信号品质的评价方法,其特征在于,所述信号品质测试盒包括A节点和B节点,在所述星上设定有A节点和B节点,所述评价方法包括如下步骤: (1)在信号品质盒测试盒的节点端断开星上A节点与B节点的SpaceWire连接电缆; (2)将断开的SpaceWir e连接电缆接入信号品质测试盒的A节点的连接器上; (3)通过测试电缆将信号品质测试盒B节点的连接器与星上B节点相连; (4)星上A节点、B节点开机工作,SpaceWire链路正常运行时,使用差分信号转换设备接至待测的差分信号对,通过示波器测试信号波形或信号眼图。 A signal quality evaluation method of the SpaceWire network link signal quality test system as claimed in claim 2 or 3, wherein said signal quality test comprises a cartridge Node A and Node B, in the a star is set on the node and the node B, the evaluation method comprising the steps of: (1) disconnecting the star node B and node a SpaceWire end node connecting cable box signal quality test cartridge; (2) off the the connector apart SpaceWir e a cable connecting the access node a signal quality test cartridge; and (3) by the test cable connector signal quality test cell node B and the node B connected to the star; (4) a star node , B node work boot, the SpaceWire link during normal operation, using a differential signal converting apparatus connected to the differential signal pairs tested, a test signal waveform by the oscilloscope or the signal eye.
CN 201610086117 2016-02-15 2016-02-15 SpaceWire network link signal quality test system and signal quality evaluation method CN105915404A (en)

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Citations (4)

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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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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

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