WO2008061413A1 - Procédé, dispositif et système permettant de reconnaître un type de câble et un câble de commutation - Google Patents

Procédé, dispositif et système permettant de reconnaître un type de câble et un câble de commutation Download PDF

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Publication number
WO2008061413A1
WO2008061413A1 PCT/CN2007/001833 CN2007001833W WO2008061413A1 WO 2008061413 A1 WO2008061413 A1 WO 2008061413A1 CN 2007001833 W CN2007001833 W CN 2007001833W WO 2008061413 A1 WO2008061413 A1 WO 2008061413A1
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WO
WIPO (PCT)
Prior art keywords
cable
signal
identifying
identification
type
Prior art date
Application number
PCT/CN2007/001833
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English (en)
Chinese (zh)
Inventor
Huayu Chang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008061413A1 publication Critical patent/WO2008061413A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Definitions

  • the present invention relates to cable access device technology, and more particularly to a method, apparatus and system for identifying cable types and adapter cable devices.
  • a Synchronous/Asynchronous serial interface can support RS-232, RS-449, EIA-530, The level of the serial communication interface standard such as EIA-530-A, V.35 and X.21 is suitable for the corresponding transmission rate and transmission distance.
  • TTL Transistor-Transistor Logic
  • TTL logic levels are converted between levels including, but not limited to, the above serial communication interface standards.
  • An existing technique for identifying a cable is to select four pins in the cable plug, and the four pins identify the ID signal by four signals, and the four signals are respectively named: ID-3, ID-2, ID- 1 and ID — 0, the signals of the four pins are connected to the power supply through the pull-up resistors on the board.
  • ID-3, ID-2, ID- 1 and ID — 0 the signals of the four pins are connected to the power supply through the pull-up resistors on the board.
  • different cables are grounded or suspended by the four identification ID signals, thus identifying the ID signal.
  • Different levels are combined. One level combination corresponds to one type of cable.
  • EIA-530, EIA-530A, RS-232, RS-449 V.35 and V.21 are interface standards for serial communication;
  • DCE Data Communicate Equipment
  • DTE Data Terminal Equipment
  • An embodiment of the present invention provides a method, device, and system for identifying a cable type to reduce the occupation of a cable connector pin on a single board when the cable is identified.
  • Another aspect of an embodiment of the present invention further provides an adapter cable device,
  • a method of identifying a cable type including:
  • a matching of the signal value of the digital signal with a preset digital signal value and a cable type is performed to identify the cable type.
  • the method of the embodiment of the present invention converts the multi-channel identification signal into a single-board analog signal through a parallel circuit, so that only one pin needs to be occupied on the single board, and only one pin needs to be occupied regardless of several identification signals. It not only reduces the use of a limited number of pins on the cable connectors on the board, but also identifies more cable types without occupying the pins, and also recognizes the connectionless state, which can further satisfy the customer. Need.
  • An adapter cable device for connecting a standard cable and cable identification device including:
  • a first cable interface for connecting to a standard cable, receiving a multi-channel identification signal transmitted by the standard cable for identifying a cable type
  • a first adapter cable configured to synthesize the multi-channel identification signal into an analog signal
  • a first cable identification device interface for transmitting the analog signal output by the first adapter cable to the cable identification device.
  • a standard cable can be connected to the cable identification device, so that the cable identification device recognizes the type of the standard cable.
  • the adapter cable device only needs to combine the multi-channel identification signals of the identification cable type, and does not need to change the original cable plug or the socket, and the adapter cable device does not change the data service signal, so the data transmission and reception will not be affected. Signal transmission.
  • a device for identifying a cable type comprising:
  • a pull-up resistor connected to the pull-up power source for obtaining an analog signal outputted by the adapter cable device; an analog-to-digital converter unit for converting the analog signal into a digital signal and obtaining a signal value of the digital signal
  • the signal value uniquely corresponds to a cable type.
  • a system for identifying cable types including:
  • a patch cable device for connecting to a standard cable, and synthesizing the multi-channel identification signal of the standard cable type uniquely sent by the standard cable into an analog signal;
  • a device for identifying a cable type for converting an analog signal transmitted by the adapter cable device into a digital signal corresponding to a cable type.
  • the device and the system of the embodiment of the present invention input the analog signal of the multi-channel identification signal into the single board through the parallel circuit, so that only the single-board cable connector is needed. It occupies one pin, and only needs to occupy one pin for several identification signals, which not only reduces the occupation of a limited number of pins of the cable connector on the single board, but also recognizes the pin without occupying the pin. More cable types, as well as a connection-free status, can further meet customer needs.
  • FIG. 1 is a structural view of an adapter cable device according to an embodiment of the present invention.
  • FIG. 2 is a structural diagram of an apparatus for identifying a cable type according to an embodiment of the present invention
  • Figure 3 is a structural diagram of a system for identifying a cable type according to an embodiment of the present invention.
  • FIG. 4 is a flow chart of a method in accordance with an embodiment of the present invention.
  • FIG. 1 is a structural diagram of an adapter cable device according to an embodiment of the present invention.
  • the adapter cable device is mainly composed of three parts:
  • a first cable interface 101 configured to be connected to a standard cable (not shown) for receiving a multi-channel identification signal for identifying a cable type transmitted by the standard cable;
  • the signal is not changed by the cable interface.
  • the cable interface can be a socket, a plug, or other connection interface.
  • the specific interface is different depending on the specific usage environment. The specific type is defined as long as the complete reception of the signal of the standard cable is within the scope of the present invention. Even when there is no cable connection, there is no signal transmitted by the standard cable, but in fact there is still a signal in the circuit. For example, one end of the standard cable is grounded through a switch, and the other end is connected to a power supply through a pull-up resistor. When the switch is off, it means that there is no cable connection. At this time, the signal obtained on the first cable interface is the power signal (that is, the voltage value of the power source is obtained).
  • the first adapter cable 102 includes a parallel circuit having the same number of lines as the number of signals of the multiple identification signals, and is configured to synthesize the multiple identification signals by using parallel resistors preset on respective lines of the parallel circuit.
  • the parallel circuit consists of n signal lines, each of which has a corresponding resistance.
  • the parallel resistance on line one is, and the parallel resistance on line 2 is R 2 , ..., the line
  • the parallel resistance on N is R n , and each identification signal is synthesized into one analog signal after passing through each parallel resistance;
  • the number of signal lines is also determined by the specific use environment, which is determined by the number of cable types that need to be identified. For example, in the prior art, it is necessary to identify 12 types of cables, and four signal lines are required; the value of the resistance on the signal lines You can take the value at will. Of course, the higher the accuracy of the resistor, the better.
  • a first cable identification device interface 103 configured to be connected to the cable identification device, to transmit the one analog signal processed by the adapter cable to a device for identifying the cable type (not shown);
  • the cable identification device interface can also be any of a socket, plug or other interface
  • the first cable identification device interface 103 is different from the first cable interface 101 in that only one of the identification signals needs to be input to the cable identification device after the first identification cable 102 synthesizes the multiple identification signals, so that the adapter cable device The identification signal is synthesized and input to the cable identification device. Since the original multi-channel identification signal has only one way, the identification signal only occupies one pin on the board, and no matter how many pins are occupied by the original identification signal, After the cable unit is connected, there is only one board pin, which greatly improves the utilization of the pins on the board and saves the pins on the board.
  • the functional entities of the adapter cable device can also add the following functional units:
  • the second cable interface may be integrated with the first cable interface or may be separated;
  • a second adapter cable for receiving and transmitting the service data signal to the second cable identification device interface; likewise, the second adapter cable may be integrated or separated from the first adapter cable;
  • a second cable identification device interface for transmitting the service data signal to a device identifying the cable type.
  • the second cable identification device interface can also be integrated with the first cable identification device interface or can be separated.
  • the patch cable device does not require any changes to the business data, it only plays a role in forwarding the traffic data. Further, in order to ensure the accuracy of the cable type identification, the resistance values of the parallel resistors on the respective lines of the parallel circuit built in the adapter cable are different from each other, so that the equivalent resistance of the parallel circuit can be ensured under different conditions.
  • the resistance values of the parallel resistors are not the same or different, which is determined by the number of cable types to be identified; for example, two identification signals are combined to form an analog signal, if two identification signals need to be identified 4
  • the resistance values need to be different from each other; but if only three, or two, or one type of cables need to be identified, the resistances of the resistors on the two lines of the parallel circuit can be the same.
  • a device for identifying a cable type mainly includes: a pull-up resistor 201, an analog-to-digital converter unit 202, and a signal value matching unit 203.
  • the pull-up resistor 201 is configured to pull up the parallel circuit in the adapter cable device to the pull-up power source to obtain an analog signal output by the parallel circuit;
  • the pull-up resistor 201 is connected with a pull-up power supply, and an analog signal transmitted by the adapter cable reaches the board, and is pulled up to the power source through the pull-up resistor 201. At this time, the pull-up resistor 201 and the parallel resistor in the adapter cable are formed. a series resistor; the resistance value of the pull-up resistor 201, the voltage value of the pull-up power supply, and the resistance value r of each parallel resistor in FIG. 1 are known, so that the voltage value of the analog signal is measured.
  • the table can know the corresponding identification signal combination by the signal value, and the cable type corresponding to each identification signal combination is also known, so the cable type corresponding to the signal value can be easily obtained;
  • the analog to digital converter unit 202 is configured to convert the analog signal into a digital signal to obtain a signal value of the digital signal, the signal value uniquely corresponding to a cable type.
  • the interval between the individual analog signal values obtained above is not very large, as described above, r / The value of (R+r) is greater than 0 and less than or equal to 1, and each circuit component itself is also errory.
  • the above signal value can be amplified by the A/D converter. For example, using an 8-bit A/D converter, the value will be between 0 and 255. Similarly, if a 10 bit A/D converter is used, the value will be between 0 and 1023, so that between the values of the analog signals The interval is increased to separate the individual signal values to ensure accuracy in cable type identification.
  • the board is a digital signal
  • the device part for identifying the cable type provided by the embodiment of the present invention can only recognize the digital signal, so the analog signal is converted into a digital signal, so that the signal values are not overlapped. , also makes the signal easy to recognize, thereby performing the corresponding operation.
  • the cable type corresponding to the signal value can be determined. For example, a correspondence table of digital signal values and cable types is set in advance, and the cable type is obtained by manually finding the relationship table.
  • the signal value matching unit 203 may be further disposed in the device, configured to match the signal value of the digital signal with a preset digital signal value and a correspondence table of the cable, and identify the cable type or the connectionless state. Thus, the cable type is automatically obtained by the device.
  • the final digital signal values obtained are different according to different combinations of resistors and different A/D converters, but in the case where the combination of resistors is determined and the A/D converter determines the signal value. It is indeed finalized, so it is possible to determine the corresponding identification signal combination based on the obtained digital signal value, thereby determining the cable type.
  • the adapter cable device and the device for identifying the cable type provided by the embodiments of the present invention can make the identification signal occupy only one pin on the single board to accurately identify the type of the cable or be connected.
  • the state reduces the occupation of a limited number of pins on the board and improves the utilization of the board pins.
  • FIG. 3 it is a structural diagram of a system for identifying a cable type according to an embodiment of the present invention, and the system mainly includes:
  • the adapter cable device 301 is configured to be connected to a standard cable (not shown), and synthesize the multi-channel identification signal sent by the standard cable to identify the standard cable type into an analog signal; wherein 11, 12 In represents an n-way identification signal line, and each identification signal line corresponds to one identification signal;
  • the device 302 for identifying a cable is configured to convert an analog signal sent by the adapter cable device 301 into a digital signal, and match the signal value of the digital signal with a preset digital signal value and a correspondence table of the cable to identify The cable type is either disconnected.
  • the multi-channel identification signal is synthesized into the analog signal by a parallel circuit built in the adapter cable device 301;
  • the number of branches of the parallel circuit is the same as the number of signals of the multi-channel identification signal, and one identification signal corresponds to a shunt of a parallel circuit;
  • the multi-channel identification signals cannot be directly combined, so that parallel resistors having different resistance values are preset on each line of the parallel circuit;
  • the voltage drop occurs in each signal, and the resistance values are different from each other.
  • the equivalent resistance of each combination is different, and different combinations correspond to different cable types. Therefore, the correct identification of the cable type or the connectionless state is ensured; in the case of the same resistance value, as described above, although the resistance values may be the same, the equivalent resistance of each cable type is actually The value is not the same, so when the resistance value is the same, the cable type can be determined according to the last equivalent resistance of the parallel circuit or in the no connection state;
  • analog signal is converted to the digital signal by an analog to digital converter
  • the parallel resistances on the respective identification signal lines are respectively corresponding to IDJ ID-1, ID-2 and ID-3 in the background art, so that the ID__x is suspended.
  • the relationship between the ID_x and the cable type described in Table 1 becomes the correspondence table of the resistance Rx and the cable type described in Table 2, wherein the signal is suspended by the existing one.
  • the corresponding switch in the cable plug determines that when a certain identification signal is empty, the corresponding switch is disconnected, and one end of the switch is grounded.
  • the cable type can be determined by a combination of different parallel resistors; assuming that the resistance of the pull-up resistor is R, the resistance of the parallel circuit composed of the parallel resistor is r, according to the characteristics of the parallel circuit, in four When the resistors are connected, the resistance r of the parallel circuit is:
  • the voltage value V of the analog signal input to the board of the adapter cable can be obtained as follows:
  • V Vcc * r / ( R + r ), where Vcc is the voltage value of the pull-up power supply;
  • the values of the respective resistors are preferably different, so that each identification signal can be determined according to different situations, if there are two parallel connections If the values of the resistors are the same, there will be multiple signal values, and the true identification signal will not be recognized.
  • This example uses the following resistance value scheme:
  • R is the resistance value of the pull-up resistor.
  • R is the resistance value of the pull-up resistor.
  • the resistance values of the resistors are different; Improve the accuracy of the identification cable, the accuracy of each component including the resistor and the power supply should be as high as possible, that is, the difference between the nominal value of the component and its actual value should not be too large, and the accuracy is preferably 1%. And above.
  • each signal value has a floating value of ⁇ 2 because there is an error between the nominal value of the resistor and its actual value in practical applications, and the AD converter is also error-prone.
  • the floating value of ⁇ 2 can ensure the correct identification of the cable.
  • the floating value of only the - 2 of the serial number 16 is because the maximum value converted by the 8-bit A/D converter is only OxFF, so only the floating value of - 2;
  • the determination of the floating value is determined by the accuracy of each device. It can also be up and down. It can also be floated up and down. Of course, it can be determined by the specific use environment. Here is just a practical example. It is not true. The range of up and down float is limited.
  • FIG. 4 is a specific flowchart of the method according to the embodiment of the present invention: Step 401: Output the cable The multi-channel identification signal for identifying the cable type is output in parallel as one analog signal;
  • Each identification signal has its own communication line.
  • a parallel resistor is added to each communication line to form a parallel circuit, and then each signal through the parallel resistance is combined into one signal; because different cable corresponding identification signals Differently, in fact, when the cable is output, it is determined according to the identification signal which communication lines are open and which communication lines are unreachable, so that the total resistance value of the parallel combination of various parallel resistances according to the communication line is turned on and off. It will be different, so that the synthesized analog signal will vary depending on the combination of the parallel resistors.
  • the analog signal is pulled up to the pull-up power supply through the pull-up resistor, and the pull-up resistor and the resistor of the parallel circuit form a series circuit, and the resistance value of the pull-up resistor and the voltage value of the pull-up power source It is known that, according to the characteristics of the series circuit, the voltage value or current value of the analog signal can be obtained, thereby determining the resistance value of the parallel circuit, and the resistance values of the respective parallel resistors are also known, so according to the characteristics of the parallel circuit, According to the resistance value of the parallel circuit, it can be known which parallel resistances are effective in the parallel circuit, so that it can be known which identification signals are valid.
  • Step 402 Convert the analog signal into a digital signal.
  • the difference between the signal values of the respective analog signals after step 401 is not so great, and the ratio of the resistance value of the parallel circuit above and the sum of the resistance values of the pull-up resistor and the parallel circuit ranges from 0 to 1. Therefore, it needs to be converted into a digital signal by an A/D (Analog/Digital) converter.
  • the AI converter with different bit widths can make the free space between the analog signals larger, for example, a 6-bit A/D converter.
  • the converted value range becomes from 0 to 63, so that different signals can be identified more accurately, ensuring the accuracy of cable type identification.
  • Step 403 Match a signal value of the digital signal with a preset digital signal value and a cable type to identify the cable type. Since the values of the respective circuit components are known, the signal values of the corresponding digital signals after the combination of the above processes can be predetermined according to the combination of the various parallel resistances, so that the digital signal values and cable types can be preset. In the corresponding relationship table, in the actual application, the corresponding cable type can be found in the corresponding relationship table according to the actually obtained value, thereby performing other operations; of course, in order to improve the identified quasi-nitrification rate, generally the digital signal value is The corresponding relationship between the value range and the cable type. The specific operations are described above and will not be described here.
  • the method is not only applied to identify the cable type on the single board, and any technical solution that is provided by the embodiment of the present invention can be used in any solution that uses a multi-way identification signal to identify the type of the cable or even the type of the access line.
  • the type is identified, and the specific similarity is not described in detail here.
  • each parallel resistor can take a different value, which ensures The signal value of each of the parallel resistors combined to the last digital signal is unique.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Dc Digital Transmission (AREA)

Abstract

Un procédé permettant de reconnaître un type de câble comprend une étape de production de signaux d'identification multiplex en parallèle en tant que signal analogique dans le câble dans lequel les signaux d'identification multiplex sont utilisés pour identifier le type de câble (401); une étape de conversion du signal analogique en signal numérique (402); une étape d'adaptation de la valeur de signal du signal numérique à la relation correspondante entre la valeur de signal numérique prédéfinie et le type de câble; et une étape de reconnaissance du type de câble ou bien de sa situation liée à son état (403) connecté ou non connecté.
PCT/CN2007/001833 2006-11-24 2007-06-11 Procédé, dispositif et système permettant de reconnaître un type de câble et un câble de commutation WO2008061413A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2006101452656A CN100495053C (zh) 2006-11-24 2006-11-24 识别电缆类型的方法、装置及系统和转接电缆装置
CN200610145265.6 2006-11-24

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WO2008061413A1 true WO2008061413A1 (fr) 2008-05-29

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CN100495053C (zh) * 2006-11-24 2009-06-03 华为技术有限公司 识别电缆类型的方法、装置及系统和转接电缆装置
CN104508643B (zh) * 2012-09-20 2018-01-26 惠普发展公司，有限责任合伙企业 检测键位置以确定线缆类型
CN104330990B (zh) * 2014-10-16 2017-02-01 航天科工惯性技术有限公司 一种偶校验电缆型号识别方法及装置
CN104297606A (zh) * 2014-10-31 2015-01-21 上海飞机制造有限公司 一种可识别被测设备地址的转接电缆测试系统
CN104469347B (zh) * 2014-12-08 2016-08-24 硅谷数模半导体（北京）有限公司 视频传输电缆的检测电路和视频输出芯片
CN109581255A (zh) * 2017-09-29 2019-04-05 江西洪都航空工业集团有限责任公司 一种测试系统的防差错系统及方法
CN108169633B (zh) * 2017-12-07 2020-02-07 中国船舶重工集团公司第七0五研究所 一种利用非关联搜索算法测试绝缘性的方法
CN109063647A (zh) * 2018-08-02 2018-12-21 国网江苏省电力有限公司无锡供电分公司 目标电缆精准识别方法
CN109738787A (zh) * 2018-12-28 2019-05-10 上海新纪元机器人有限公司 一种电缆识别方法及系统
CN110940415B (zh) * 2019-11-07 2022-04-08 中国人民武装警察部队士官学校 激光感知系统和方法
CN111083666B (zh) * 2019-12-17 2024-02-23 联合汽车电子有限公司 网络节点标序方法、网络节点和网络系统
CN112067919B (zh) * 2020-07-28 2023-06-13 北京机电工程研究所 一种电缆类型自动识别装置及自动化测试方法

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CN1963547A (zh) 2007-05-16

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