Fault detection circuit, instrument, method, device, system, equipment and medium

Abstract

The present application provides a fault detection circuit, instrument, method, device, system, equipment and medium, wherein the fault detection circuit includes a first signal interface, a second signal interface, a first indicator light and a second indicator light; the first signal interface is used to connect to the transmitting end of the node device to be detected of the broadband satellite access network; the second signal interface is used to connect to the receiving end of the node device to be detected; the first indicator light has unidirectional conductivity, and the positive pole of the first indicator light is connected to the first signal interface; the negative pole of the first indicator light is grounded through a first protective resistor; the second indicator light has unidirectional conductivity, and the positive pole of the second indicator light is connected to the second signal interface through a second protective resistor; the negative pole of the second indicator light is connected to the first signal interface. The fault of the broadband satellite access network can be determined by the status of the first indicator light and the second indicator light, which is convenient and quick; and the fault detection circuit provided in the embodiment of the present application is easy to make and low in cost.

Description

Technical Field

[0001] The present application relates to the field of satellite communication technology, and in particular to fault detection circuits, instruments, methods, devices, systems, equipment and media. Background Art

[0002] At present, the fault handling of the transmitting and receiving site of the broadband satellite terminal station relies on the monitoring function in the satellite system modem, and checks and reads the current signal-to-noise ratio Eb / No value and the transmission error situation through the satellite modem Rx-PARAM. However, these monitoring functions can only provide monitoring data of the uplink and downlink signal levels and transmission error rates from the local transceiver equipment to the satellite transponder transceiver. If the fault occurs in other network element locations, it cannot be found locally, and it is impossible to provide the necessary data support for eliminating the entire transmission fault, and it is also impossible to provide the positioning and judgment capabilities of the initial opening stage and the entire network, including the ground circuit fault.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] In view of the above problems, the present application is proposed to provide a fault detection circuit, instrument, method, device, system, equipment and medium that overcome the above problems or at least partially solve the above problems.

[0005] A fault detection circuit is used to detect faults in a broadband satellite access network; the fault detection circuit comprises: a first signal interface, a second signal interface, a first indicator light and a second indicator light;

[0006] The first signal interface is used to connect to the transmitting end of the node device to be detected of the broadband satellite access network;

[0007] The second signal interface is used to connect to the receiving end of the node device to be detected;

[0008] The first indicator light has unidirectional conductivity, the positive electrode of the first indicator light is connected to the first signal interface; the negative electrode of the first indicator light is grounded through a first protection resistor;

[0009] The second indicator light has unidirectional conductivity, and the positive electrode of the second indicator light is connected to the second signal interface through a second protection resistor; the negative electrode of the second indicator light is connected to the first signal interface.

[0010] Optionally, a reverse blocking module is also included;

[0011] The reverse blocking module is connected in parallel with the second indicator light.

[0012] Optionally, the first indicator light and the second indicator light are both light emitting diodes, and the reverse blocking module includes a PNP transistor, an NPN transistor, and a diode;

[0013] The base of the PNP transistor is connected to the second signal interface via a third protection resistor, the emitter of the PNP transistor is grounded, and the collector of the PNP transistor is connected to the first signal interface via a fourth protection resistor;

[0014] The base of the NPN transistor is connected to the collector of the PNP transistor through a fifth protection resistor; the collector of the NPN transistor is grounded, the emitter of the NPN transistor is connected to the anode of the diode through a sixth protection resistor, and the cathode of the diode is connected to the first signal interface.

[0015] Optionally, the first signal interface and the second signal interface have a shielding layer.

[0016] Optionally, the first signal interface and the second signal interface include at least any one of a 25-pin data interface, a digital circuit BNC data interface, a 15-pin data interface, and an RJ45 interface.

[0017] A fault detection instrument comprises a housing and the fault detection circuit as described above, wherein the fault detection circuit is integrated in the housing, and the housing is provided with a first mounting interface connected to the first signal interface, and a second mounting interface connected to the second signal interface.

[0018] A fault detection method, the method comprising:

[0019] When a fault occurs in the broadband satellite access network, a current first indicator light state and a current second indicator light state of a fault detection circuit connected to a node device to be detected of the broadband satellite access network are obtained; wherein the fault detection circuit is the fault detection circuit according to any one of claims 1 to 5;

[0020] Determine a faulty link according to the current first indicator light state and the current second indicator light state;

[0021] A binary search method is used to locate the fault of the faulty link.

[0022] Optionally, the broadband satellite access network includes a local link where the node device to be detected is located, and a remote link connected to the node device to be detected via a broadband satellite; and determining the faulty link according to the current first indicator light state and the current second indicator light state includes:

[0023] When the current first indicator light state and the current second indicator light state are both in a bright state, determining that the remote link is a faulty link;

[0024] When the current first indicator light state or the current second indicator light state is dark, it is determined that the local link is a faulty link.

[0025] Optionally, the method further comprises:

[0026] When the current first indicator light state or the current second indicator light state is in a dark state, a circuit state relationship table is obtained, wherein the circuit state relationship table is used to record the association relationship between the first indicator light state and the second indicator light state and the fault cause;

[0027] The circuit state relationship table is searched according to the current first indicator light state and the current second indicator light state to determine the target fault cause.

[0028] Optionally, the adopting a binary method to locate the fault of the faulty link includes:

[0029] When the faulty link is a remote link, a remote node to be tested in the remote link is determined by a binary search method, and a loop is made toward the broadband satellite;

[0030] Updating the current first indicator light state and the current second indicator light state of the fault detection circuit, and continuing to determine the faulty link according to the current first indicator light state and the current second indicator light state;

[0031] When the faulty link is a local link, a dichotomy method is used to determine a local node to be tested in the local link;

[0032] A new node device to be detected is determined according to the local node to be detected, and the node device to be detected is updated with the new node device to be detected.

[0033] A fault detection device, comprising:

[0034] An indication status acquisition module, used for acquiring a current first indicator light status and a current second indicator light status of a fault detection circuit connected to a node device to be detected of the broadband satellite access network when a fault occurs in the broadband satellite access network; wherein the fault detection circuit is the fault detection circuit as described above;

[0035] A faulty link determination module, configured to determine a faulty link according to the current first indicator light state and the current second indicator light state;

[0036] The target fault location module is used to locate the fault of the faulty link by using a binary method.

[0037] Optionally, the broadband satellite access network includes a local link where the node device to be detected is located, and a remote link connected to the node device to be detected via a broadband satellite; the fault link determination module includes:

[0038] A first determination submodule, configured to determine that the remote link is a faulty link when both the current first indicator light state and the current second indicator light state are on;

[0039] The second determining submodule is used to determine that the local link is a faulty link when the current first indicator light state or the current second indicator light state is dark.

[0040] Optionally, the device may further include:

[0041] A relationship table acquisition module, used for acquiring a circuit state relationship table when the current first indicator light state or the current second indicator light state is in a dark state, wherein the circuit state relationship table is used for recording the association relationship between the first indicator light state and the second indicator light state and the cause of the fault;

[0042] The fault cause determination module is used to search the circuit state relationship table according to the current first indicator light state and the current second indicator light state to determine the target fault cause.

[0043] Optionally, the target fault locating module includes:

[0044] A looping submodule, used for, when the faulty link is a remote link, determining a remote node to be tested in the remote link by using a binary search method, and looping toward the broadband satellite;

[0045] A loop test submodule, used for updating the current first indicator light state and the current second indicator light state of the fault detection circuit, and continuing to determine the faulty link according to the current first indicator light state and the current second indicator light state;

[0046] A local node determination submodule, used for determining a local node to be tested in the local link by using a dichotomy method when the faulty link is a local link;

[0047] The node device to be detected updating submodule is used to determine a new node device to be detected according to the local node to be detected, and use the new node device to be detected to update the node device to be detected.

[0048] A fault detection system comprises a broadband satellite access network and the fault detection device as described above.

[0049] An electronic device comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the computer program implements the above-mentioned fault detection method when executed by the processor.

[0050] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the fault detection method described above is implemented.

[0051] This application has the following advantages:

[0052] The fault detection circuit provided by the embodiment of the present application can detect faults in the broadband satellite access network. Among them, the first signal interface of the fault detection circuit is used to connect the transmitting end of the node device to be detected of the broadband satellite access network; the second signal interface is used to connect the receiving end of the node device to be detected; the first indicator light has unidirectional conductivity, the positive pole of the first indicator light is connected to the first signal interface; the negative pole of the first indicator light is grounded through the first protection resistor; the second indicator light has unidirectional conductivity, the positive pole of the second indicator light is connected to the second signal interface through the second protection resistor; the negative pole of the second indicator light is connected to the first signal interface; when the transmitting end and the receiving end of the node device to be detected are normal, the first indicator light and the second indicator light are both bright, if there is a fault in the broadband satellite access network, it can be determined that the fault is at the far end of the device to be detected; when the transmitting end of the node device to be detected is abnormal, the first indicator light is dark; when the transmitting end of the node device to be detected is normal, but the receiving end is abnormal, the first indicator light is bright, and the second indicator light is dark; therefore, the fault of the broadband satellite access network can be determined by the states of the first indicator light and the second indicator light of the fault detection circuit provided by the embodiment of the present application, which is convenient and quick; and the fault detection circuit provided by the embodiment of the present application is easy to make and low in cost.

[0053] The fault detection method provided in the embodiment of the present application uses the above-mentioned fault detection circuit to detect faults in the broadband satellite access network. When a fault occurs in the broadband satellite access network, the current first indicator light state and the current second indicator light state of the fault detection circuit connected to the node device to be detected in the broadband satellite access network are obtained; the node device to be detected is located at any node in the broadband satellite access network; the fault link is determined according to the current first indicator light state and the current second indicator light state, and finally the fault link is located by using the binary method; by combining the fault detection circuit and the binary method, the efficiency of fault location can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0055] Figure 1 This is a schematic diagram of the network topology of a broadband satellite access network in an example of an embodiment of the present application;

[0056] Figure 2 A schematic diagram of a fault detection circuit provided in an embodiment of the present application;

[0057] Figure 3 This is a schematic diagram of electrical parameters of the LVDS interface transceiver circuit;

[0058] Figure 4 This is a schematic diagram of the electrical connection of the 25-pin physical interface;

[0059] Figure 5 A data connection diagram of the BNC physical interface used by G.703.U;

[0060] Figure 6 Interface circuit diagram of BNC physical interface used by G.703.U;

[0061] Figure 7 for Figure 6 A magnified schematic diagram of the output waveform of the middle interface;

[0062] Figure 8 This is a schematic diagram of the HDB3 code waveform;

[0063] Fig. 9 This is a schematic diagram of the HDB3 code waveform measured experimentally;

[0064] Fig.10 A schematic diagram of a fault detection instrument according to an embodiment of the present application;

[0065] Fig.11 A flowchart of a fault detection method according to an embodiment of the present application;

[0066] Fig.12 This is a schematic diagram of the location of fault detection in the mobile communication satellite access network;

[0067] Fig.13 This is a schematic diagram of the fault detection location of the mobile communication 4G satellite access system;

[0068] Fig.14 This is a structural block diagram of a fault detection device according to an embodiment of the present application. DETAILED DESCRIPTION

[0069] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0070] Satellite communication technology is a communication between two or more earth stations using artificial earth satellites as relay stations to forward radio waves. Figure 1 As shown in the figure, the satellite communication system has a long space transmission distance, up to 80,000 kilometers for uplink and downlink, a long two-way transmission delay, and a round-trip time (RTT) of up to 540ms. There are many ground circuit transmission nodes and network elements, and the routing is complex. The network units passed through belong to different regions and systems. For a given maximum window size (the product of bandwidth and delay RTT), a large round-trip delay will limit the transmission rate of the system. In order to cope with various fading in space transmission, the broadband satellite transmission system adopts advanced automatic error correction, high-gain antennas, variable coding scheme selection and other system gains to compensate for the space transmission loss. At the same time, in order to increase the system capacity, high-order modulation, carrier superposition, time slot insertion and other technologies have been developed. Accordingly, it is required that the faults of the entire satellite circuit and the entire network can be quickly located, judged and eliminated.

[0071] The circuit opening and fault repair of broadband satellite communication system involves the ground transmission system SDH equipment nodes or IP (Internet Protocol) network elements, transmission optical paths and data configuration, access network elements and data configuration, satellite modem equipment, IDU (In Door Unit), ODU (Out Door Unit) equipment, on-board transponders, network element equipment of ground terminal stations, as well as protocol conversion, cross-connection circuits, synchronous clocks, etc. From the transmission medium, it can be divided into optical paths, circuits, transmission multiplexing equipment, relay node equipment, optoelectronic interface equipment, etc.; from the fault type, it can be divided into physical layer faults and data link layer faults. Therefore, fast, accurate and reliable fault location judgment and positioning is the core work of emergency communication guarantee.

[0072] At present, the emergency site can only monitor the uplink and downlink channels of the satellite during the opening process of broadband satellite circuits. It is impossible to control the entire process of troubleshooting and conduct scheduling and fault problem analysis. It lacks the necessary technical means and is often unable to accurately determine at which node the fault occurs, resulting in delayed troubleshooting time and seriously affecting the efficiency of the opening of the emergency communication satellite circuit system.

[0073] One of the main technical concepts of the embodiments of the present application is to design a fault detection circuit driven by the baseband signal pulse level value of the broadband satellite access network according to the interface protocol and electrical characteristics of the broadband satellite access network, and to provide a first indicator light and a second indicator light with unidirectional conductivity in the fault detection circuit. The state of the communication link is intuitively displayed through the first indicator light and the second indicator light, so that the state of each network segment circuit can be discovered in time when the satellite circuit is opened, and the faults of each network segment can be discovered and judged and handled quickly and promptly.

[0074] Reference Figure 2 , shows a schematic diagram of a fault detection circuit provided in an embodiment of the present application; the fault detection circuit is used to detect faults in a broadband satellite access network. In the embodiment of the present application, the fault detection circuit may include: a first signal interface P1, a second signal interface P2, a first indicator light D1, and a second indicator light D2.

[0075] The first signal interface P1 is used to connect to the transmitter TX of the node device to be detected of the broadband satellite access network; the node device to be detected can be a device at any node in the broadband satellite access network. It can be understood that the device at any node in the broadband satellite access network has a transmitter TX and a receiver RX. Generally, the node device to be detected can be determined by a fault personnel or by a fault detection method.

[0076] The second signal interface P2 is used to connect to the receiving end RX of the node device to be detected.

[0077] The first indicator light D1 has unidirectional conductivity, and the positive electrode of the first indicator light D1 is connected to the first signal interface P1; the negative electrode of the first indicator light D1 is grounded through the first protection resistor R1.

[0078] The second indicator light D2 has unidirectional conductivity, and the positive electrode of the second indicator light D2 is connected to the second signal interface P2 through the second protection resistor R2; the negative electrode of the second indicator light D2 is connected to the first signal interface P1.

[0079] When the transmitting end TX and the receiving end RX of the node device to be detected are both normal, the first indicator light D1 and the second indicator light D2 are both bright. It should be noted that the bright state refers to the state observed by the human eye, and does not mean that the first indicator light D1 and the second indicator light D2 are continuously in the on state; at this time, if there is a fault in the broadband satellite access network, it can be determined that the fault is at the far end of the device to be detected. When the transmitting end TX of the node device to be detected is abnormal, the first indicator light D1 is dark; the dark state can indicate that the first indicator light D1 is continuously in the off state. When the transmitting end TX of the node device to be detected is normal, but the receiving end RX is abnormal, the first indicator light D1 is bright, and the second indicator light D2 is dark. Therefore, the fault of the broadband satellite access network can be determined by the state of the first indicator light D1 and the second indicator light D2 of the fault detection circuit provided in the embodiment of the present application, which is convenient and quick; and the fault detection circuit provided in the embodiment of the present application is easy to manufacture and has low cost.

[0080] In practical applications, a circuit state relationship table can be prepared according to the test principle of the fault detection circuit. The circuit state relationship table can be shown in Table 1 below, which is used to record the association between the first indicator light state D1 and the second indicator light state D2 and the cause of the fault; the corresponding detection results can also be recorded.

[0081] Table 1

[0082]

[0083]

[0084] In practical applications, combining the circuit state relationship table to realize fault detection can lower the technical threshold of satellite circuit fault handling and improve the speed and accuracy of fault judgment.

[0085] Considering that there are five commonly used transmission interface protocols, they are: RS-422, V.35, LVDS, G.703 and Ethernet protocols.

[0086] The broadband satellite baseband modem data interface types are:

[0087] RS-422: The minimum available rate is 15Mbps, using differential transmission, the voltage difference between the sender's AB end is:

[0088] +2~+6V, logic 1;

[0089] -2~-6V, logic 0.

[0090] V.35: The minimum available rate is 15Mbps.

[0091] LVDS: The minimum available rate is 20Mbps, and the theoretical limit rate is 1.923Gbps. The input voltage range of the receiver varies from 0V to +2.4V.

[0092] The data interfaces of the above three protocols (ie RS-422, V.35 and LVDS) use 25-pin, ie 25-pin data interface.

[0093] G.703: Use digital circuit BNC and 15-Pin data input and output interface.

[0094] Ethernet protocol: uses the RJ45 interface.

[0095] In order to make the fault detection circuit provided in the embodiment of the present application applicable to different transmission interface protocols, the first signal interface P1 and the second signal interface P2 in the above fault detection circuit include at least any one of a 25-pin data interface, a digital circuit BNC data interface, a 15-Pin data interface, and an RJ45 interface. It can be understood that the first signal interface P1 and the second signal interface P2 in the embodiment of the present application may include multiple types of data interfaces to improve the convenience of use of the fault detection circuit provided in the embodiment of the present application.

[0096] Furthermore, in some optional embodiments of the present application, the above-mentioned fault detection circuit may also include a reverse blocking module, and the reverse blocking module is connected in parallel with the second indicator light D2.

[0097] In order to prevent the reverse current from damaging the circuit, a reverse blocking module is added in this embodiment. The reverse blocking module is connected in parallel with the second indicator light D2, which can effectively protect the second indicator light D2.

[0098] Optionally, the first indicator light D1 and the second indicator light D2 are both light emitting diodes, and the reverse blocking module includes a PNP transistor Q1, an NPN transistor Q2, and a diode D3;

[0099] The base of the PNP transistor Q1 is connected to the second signal interface P2 via a third protection resistor R3 , the emitter of the PNP transistor Q1 is grounded, and the collector of the PNP transistor Q1 is connected to the first signal interface P1 via a fourth protection resistor R4 .

[0100] The base of the NPN transistor Q2 is connected to the collector of the PNP transistor Q1 through the fifth protection resistor R5; the collector of the NPN transistor Q2 is grounded, the emitter of the NPN transistor Q2 is connected to the anode of the diode D3 through the sixth protection resistor R6, and the cathode of the diode D3 is connected to the first signal interface P1.

[0101] Since light-emitting diodes have unidirectional conductivity and light-emitting characteristics, they meet the requirements of the first indicator light D1 and the second indicator light D2, and light-emitting diodes also have the advantages of low energy consumption, fast response time, and low price. Therefore, in this embodiment, light-emitting diodes can be selected as the first indicator light D1 and the second indicator light D2 to fully utilize the advantages of light-emitting diodes.

[0102] When the first indicator light D1 and the second indicator light D2 are light-emitting diodes, the corresponding reverse blocking module may specifically include a PNP transistor Q1, an NPN transistor Q2, and a diode D3. The base of the PNP transistor Q1 is connected to the second signal interface P2 through a third protection resistor R3, the emitter of the PNP transistor Q1 is grounded, and the collector of the PNP transistor Q1 is connected to the first signal interface P1 through a fourth protection resistor R4; the base of the NPN transistor Q2 is connected to the collector of the PNP transistor Q1 through a fifth protection resistor R5; the collector of the NPN transistor Q2 is grounded, the emitter of the NPN transistor Q2 is connected to the positive electrode of the diode D3 through a sixth protection resistor R6, and the negative electrode of the diode D3 is connected to the first signal interface P1; thereby, the second indicator light D2 is protected by reverse blocking.

[0103] In a specific example of the present application, the first protection resistor R1 is 300 ohms, the second protection resistor R2 is 100 ohms, the third protection resistor R3 and the fourth protection resistor R4 are both 51K ohms, the fifth protection resistor R5 is 10K ohms, and the sixth protection resistor R6 is 300 ohms.

[0104] It should be noted that the resistance values ​​of the various resistors in the above examples are only a set of experimental data in the fault detection circuit made by the inventor. In practical applications, they are not limited to the above examples. Those skilled in the art can appropriately adjust the resistance values ​​of the resistors according to the contents disclosed in the embodiments of the present application, as long as the overall circuit meets the corresponding interface impedance and other requirements.

[0105] Furthermore, in order to prevent components from being interfered with when the circuit is working, and to prevent components from emitting interference signals that affect the operation of the circuit when working, in some optional embodiments of the present application, the above-mentioned first signal interface P1 and the second signal interface P2 have a shielding layer. As shown in the figure, the GND connected between the first signal interface P1 and the second signal interface P2 indicates that the corresponding shielding layer is grounded, so as to take isolation measures for the components or circuits.

[0106] In some implementations, the first signal interface P1 and the second signal interface P2 are coaxial cable interfaces or twisted pair interfaces.

[0107] In order to facilitate technical personnel in this field to understand the present solution, the electrical characteristics of some data transmission interfaces of the broadband satellite access network will be introduced below, and the fault detection circuit provided in the embodiment of the present application will be introduced with specific examples.

[0108] Taking the LVDS protocol circuit as an example, the various circuits and signal parameters of LVDS are defined in the following two standards: IEEEP1996.3, which is mainly oriented to SCI (Scalable Coherent Interface). It defines the electrical characteristics of LVDS and also defines the encoding of packet exchange in the SCI protocol; ANS / EIA / EIA-644 (approved in November 1995), mainly defines the electrical characteristics of LVDS, and recommends parameters such as the maximum transmission rate and theoretical limit rate. The LVDS standard usually mentioned refers to the latter. The ANS / EIA / EIA-644 standard was revised and published in 2001. The corresponding pulse peak nominal voltages are: -2.7V and -1.1V respectively.

[0109] The electrical parameters of the LVDS interface transceiver circuit are as follows: Figure 3 As shown, the electrical connection diagram of the 25-pin physical interface is as follows Figure 4 Pick up Receive Data A on 25-pin pin 3, Receive Data B on pin 16, Receive Clock A on 25-pin pin 17, and Receive Clock B on pin 9.

[0110] The first signal interface P1 of the fault detection circuit provided in the embodiment of the present application is connected to the 25-pin pin 2 of the node device to be detected, and the second signal interface P2 is connected to the 25-pin pin 3 of the node device to be detected. This part of the circuit can be tested without looping the other end.

[0111] Similar to the LVDS protocol circuit, the current G.703U interface circuit is a digital transmission system primary group (i.e. PCM30) standard established by ITU-T and named by the European Postal and Telecommunications Association (CEPT). It is a form of time division multiplexing with a frame length of 256 bits, divided into 32 time slots, each time slot is 64Kbps. The physical and electrical characteristics of the circuit interface conform to the G.703 standard of ITU-T. HDB3 (High Density Bipolar of order 3code) encoding is used for broadband satellite line transmission. Its impedance characteristics are: unbalanced 75 ohms (corresponding to 75 ohm coaxial cable) and balanced 120 ohms (corresponding to 120 ohm twisted pair). The corresponding pulse peak nominal voltages are 2.37V and 3V respectively.

[0112] For the BNC physical interface used by G.703.U, the data connection is as follows Figure 5 As shown, the interface circuit is Figure 6 As shown, Figure 7 for Figure 6 The enlarged schematic diagram of the output waveform of the interface in the figure. It can be seen from the figure that the level value of the G.703.U interface is between -1.1V and -2.7V. When using the fault detection circuit, the first signal interface PI and the second signal interface P2 are connected to the receiving end RX and the transmitting end TX of the BNC in the device respectively, and the circuit can be tested without looping back at the opposite end.

[0113] To determine the working status of the receiving and transmitting circuits in a circuit, we need to study the signal parameters in the link and take corresponding reading measures.

[0114] For example, for signals transmitted using HDB3 (third-order high-density bipolar code) or AMI coding, the physical layer electrical parameters are shown in Table 2. The HDB3 code waveform is as follows: Figure 8 As shown in the experiment, the HDB3 code waveform is as follows Fig. 9 As shown in the figure, the measured waveform of HDB3 encoding shows that its positive and negative pulses are 2.37V, which can drive the light-emitting diode.

[0115] Table 2

[0116]

[0117]

[0118] Through the electrical characteristics of the data transmission interface introduced above, the following information can be obtained:

[0119] Data rate: 2048Kbps±50ppm;

[0120] Interface impedance: RJ45—120Ω;

[0121] BNC—75Ω;

[0122] Interface connector: RJ45 or BNC;

[0123] According to the above parameters, the short-circuit current of E1 circuit can be calculated:

[0124] Unbalanced line short-circuit current: 2.37V÷75Ω≈32mA;

[0125] Balanced line short-circuit current: 3V÷120Ω≈25mA.

[0126] The fault detection circuit provided in the embodiment of the present application can be considered to be designed based on the above information. Fig. 9 The data flow or basic clock signal indicates that the circuit state is in the data transmission state or idle state. At this time, there is an HBD3 pulse coding signal (data and system clock both use this type of coding) in the circuit, and the pulse level value is about 2.5V. In the first half cycle of the pulse, that is, the positive cycle, when its level value is greater than 0.9V, the first indicator light D1 obtains a forward voltage. When the current value is greater than 5mA, the first indicator light D1 is electronically excited and lights up. In the positive cycle, the diodes and transistors of other branches are subjected to reverse voltage, and the circuit is blocked, that is, the second indicator light D2, the diode D3, the PNP transistor Q1, and the NPN transistor Q2 are all blocked.

[0127] When the signal on the transmitting end TX side enters the negative cycle, if the circuit on the receiving end RX side is normal, the PNP transistor Q1 and the NPN transistor Q2 are subjected to a forward voltage, and the base voltage is excited by the voltage of the negative cycle, and a current flows through them, which forms a loop with the second signal interface P2 and the first signal interface P1. At this time, the second indicator light D2 has a forward voltage, which is applied to both sides of the second indicator light D2 through the second protection resistor R2, and a forward voltage is obtained, so that the second indicator light D2 lights up. When the signal on the transmitting end TX side enters the negative cycle, the first indicator light D1 does not light up. Since the frequency of the positive and negative cycle exchange exceeds the frequency visible to the naked eye, the first indicator light D1 lights up in the positive cycle and does not light up in the negative cycle, and it is still in a bright state as a whole. The second indicator light D2 does not light up in the positive cycle and lights up in the negative cycle, and it is also in a bright state as a whole. At this time, it means that the signal parameters of the circuit parts of the receiving end RX and the transmitting end TX are within the normal range, and the circuit is unblocked.

[0128] When the TX signal at the transmitting end enters a negative cycle, if the circuit at the receiving end RX side fails, such as when the receiving end RX is disconnected, the second indicator light D2 is turned off because the receiving end RX is disconnected, the base of the PNP transistor Q1 is suspended, the PNP transistor Q1 loses the excitation voltage, and the branch is in a disconnected state. No current flows through the second indicator light D2 and it does not light up. Since the second indicator light D2 is in a reverse voltage state and does not light up in any other cycle of the HBD3 pulse coding, when the circuit at the receiving end RX side fails, the second indicator light D2 is in a dark state.

[0129] The fault detection circuit provided in the embodiment of the present application can achieve impedance matching and level matching with the output of the circuit under test. Through a week-long circuit test experiment, no obvious changes were caused to the electrical parameters of the circuit under test, and the performance of the circuit under test was stable.

[0130] When the fault detection circuit provided by the embodiment of the present application is used for fault detection, the fault of the broadband satellite access network can be determined by the state of the first indicator light D1 and the second indicator light D2 of the fault detection circuit, which is convenient and quick; and the fault detection circuit provided by the embodiment of the present application is easy to manufacture and has low cost. In addition, combined with the use of the circuit state relationship table, the staff can quickly determine the cause of the fault by looking up the table, thereby reducing the technical threshold for troubleshooting.

[0131] like Fig.10 As shown, an embodiment of the present application also discloses a fault detection instrument, which includes a housing and a fault detection circuit as described above, wherein the fault detection circuit is integrated in the housing, and the housing is provided with a first installation interface 1001 connected to the first signal interface P1, and a second installation interface 1002 connected to the second signal interface P2.

[0132] In an optional embodiment of the present application, the housing of the fault detection instrument and the portions corresponding to the first indicator light D1 and the second indicator light D2 are transparent, so that the user can directly observe the status of the first indicator light D1 and the second indicator light D2.

[0133] In an optional embodiment of the present application, the fault detection instrument may further include a display screen, and the display screen is used to display a circuit state relationship table.

[0134] Of course, in some optional embodiments, the circuit status relationship table can also be displayed on the outside of the fault detector housing by printing, laser, etc., so that the user can refer to the circuit status relationship table and quickly know the status of the detected circuit.

[0135] The use of the fault detection instrument provided in the embodiment of the present application to perform fault detection on a broadband satellite access network has the following advantages over the existing fault handling methods:

[0136] 1. The fault detection instrument is small in size and light in weight, and is convenient for emergency communication personnel and vehicles to carry. The test and judgment are convenient and efficient, and the satellite circuit opening time is significantly improved. In addition, the fault detection instrument provided in the embodiment of the present application can also be applied to the communication systems of civil aviation, securities, banks, civil air defense, troops, hospitals, and television stations.

[0137] 2. Compared with traditional bit error testers imported from abroad, the fault detection instrument provided in the embodiment of the present application is low-cost and easy to use. One can be configured for each emergency broadband satellite terminal as a standard configuration device for the satellite ground station and can be used anytime and anywhere, greatly saving the time wasted in deploying test instruments when a fault occurs.

[0138] 3. Combined with the circuit status relationship table, it is convenient to quickly determine the on and off status of the transmission circuit. Operators do not need long-term training, which is more convenient for popularization and application.

[0139] Reference Fig.11 , shows a flowchart of a fault detection method provided by an embodiment of the present application. In the embodiment of the present application, the method may include the following steps:

[0140] Step 1101, when a broadband satellite access network fails, obtain a current first indicator light state and a current second indicator light state of a fault detection circuit connected to a node device to be detected of the broadband satellite access network.

[0141] Wherein, the fault detection circuit is the above-mentioned fault detection circuit, and the node device to be detected is located at any node in the broadband satellite access network.

[0142] Step 1102: determine a faulty link according to the current first indicator light state and the current second indicator light state.

[0143] Step 1103: Use a binary search method to locate the fault of the faulty link.

[0144] The fault detection method provided in the embodiment of the present application uses the above-mentioned fault detection circuit to detect faults in the broadband satellite access network. When a fault occurs in the broadband satellite access network, the current first indicator light state and the current second indicator light state of the fault detection circuit connected to the node device to be detected in the broadband satellite access network are obtained; the node device to be detected is located at any node in the broadband satellite access network; the fault link is determined according to the current first indicator light state and the current second indicator light state, and finally the fault link is located by using the binary method; by combining the fault detection circuit and the binary method, the efficiency of fault location can be improved.

[0145] Next, the fault detection method in this exemplary embodiment will be further described.

[0146] In step 1101, when a fault occurs in a broadband satellite access network, a current first indicator light state and a current second indicator light state of a fault detection circuit connected to a node device to be detected of the broadband satellite access network are obtained.

[0147] The fault detection method provided in the embodiment of the present application is used to troubleshoot and locate the fault when a broadband satellite access network fails. Whether a broadband satellite access network fails can be discovered through a network management system (also called a network management system) or through user reported data. For example, when a terminal cannot communicate normally, it means that a broadband satellite access network fails.

[0148] When it is determined that a fault occurs in the broadband satellite access network, the current first indicator light state and the current second indicator light state of the fault detection circuit connected to the node device to be detected of the broadband satellite access network are obtained. Exemplarily, when it is determined that a fault occurs in the broadband satellite access network, a node device of any node in the broadband satellite access network can be used as the node device to be detected, the fault detection circuit in the above embodiment can be connected to the node device to be detected, and then the first indicator light state and the second indicator light state of the fault detection circuit at this time are observed. For easy distinction, the first indicator light state at this time is recorded as the current first indicator light state, and the second indicator light state at this time is recorded as the current second indicator light state.

[0149] In step 1102, a faulty link is determined according to the current state of the first indicator light and the current state of the second indicator light.

[0150] It can be seen from the description of the preceding embodiments that the indicator light state of the fault detection circuit is related to the state of the node device to be detected to which it is connected. Therefore, whether the node device to be detected is normal can be judged based on the current first indicator light state and the current second indicator light state, so that the fault can be located subsequently based on the judgment result.

[0151] Exemplarily, the broadband satellite access network includes a local link where the node device to be detected is located, and a remote link connected to the node device to be detected via a broadband satellite; the above-mentioned determining the faulty link according to the current first indicator light state and the current second indicator light state may include:

[0152] When the current first indicator light state and the current second indicator light state are both in a bright state, determining that the remote link is a faulty link;

[0153] When the current first indicator light state or the current second indicator light state is dark, it is determined that the local link is a faulty link.

[0154] Combined with the description of the above fault detection circuit embodiment, it can be known that when the first indicator light state and the second indicator light state of the fault detection circuit are both in a bright state, it means that the receiving interface and the sending interface of the node device to be detected are normal, that is, the node device to be detected is normal, indicating that the local link where the node device to be detected is located is normal, and the fault location is the remote link, so the remote link is determined to be a faulty link. When at least one of the first indicator light state or the second indicator light state of the fault detection circuit is in a dark state, it means that at least one of the receiving interface or the sending interface of the node device to be detected is abnormal, that is, the node device to be detected is abnormal, indicating that the local link where the node device to be detected is located is faulty, so the local link is determined to be a faulty link.

[0155] When it is detected that the node device to be detected is abnormal, it can be explained that the node device to be detected cannot communicate normally with other devices, and it is necessary to further determine whether the node device to be detected has a problem on the receiving interface side or the sending interface side. In an optional embodiment of the present application, the following steps may also be included:

[0156] When the current first indicator light state or the current second indicator light state is in a dark state, a circuit state relationship table is obtained, wherein the circuit state relationship table is used to record the association relationship between the first indicator light state and the second indicator light state and the cause of the fault;

[0157] The circuit state relationship table is searched according to the current first indicator light state and the current second indicator light state to determine the target fault cause.

[0158] Among them, the circuit state relationship table is related to the design of the fault detection circuit, and is used to record the association between the first indicator light state and the second indicator light state and the cause of the fault, so that when the user uses the fault detection circuit, he can quickly and accurately determine the cause of the fault without understanding the principle of the fault detection circuit.

[0159] In this embodiment, when executing the fault detection method provided in the embodiment of the present application, the target fault cause can also be determined through the circuit state relationship table. The circuit state relationship table can refer to the one shown in Table 1 above.

[0160] It can be understood that when the current first indicator light is on and the current second indicator light is off, the corresponding target fault cause is the RX core wire and shield wire disconnection. When the current first indicator light and the second indicator light are both off, the corresponding target fault cause is the TX side welding detachment, cold welding, or disconnection.

[0161] It should be noted that when the current first indicator light state and the second indicator light state are both dark, it cannot be ruled out that there is no fault on the receiving end RX side, but it only means that there must be a fault on the transmitting end TX side.

[0162] In actual applications, after the fault is repaired based on the target fault cause detected at this time, if the network management still reports a link disconnection alarm, the node device to be detected can be fault-detected again, and then the fault can be troubleshooted based on the result of the re-detection.

[0163] In addition, the circuit state relationship table may also include a detection result, through which a faulty link may be determined.

[0164] Exemplarily, when the current first indicator light state is on and the current second indicator light state is off, the corresponding detection result is a local RX side circuit failure, that is, the faulty link is a link in the local link located on the receiving end side of the node device to be detected.

[0165] In step 1103, a binary search method is used to locate the fault of the faulty link.

[0166] After the faulty link is determined, since the faulty link is generally long and contains multiple nodes, it is necessary to further locate the specific node where the fault occurs. Therefore, the faulty link can be located by using the binary method.

[0167] Exemplarily, the above-mentioned using the dichotomy method to locate the fault of the faulty link may include:

[0168] When the faulty link is a remote link, a remote node to be tested in the remote link is determined by a binary search method, and a loop is made toward the broadband satellite;

[0169] Updating the current first indicator light state and the current second indicator light state of the fault detection circuit, and continuing to determine the faulty link according to the current first indicator light state and the current second indicator light state;

[0170] When the faulty link is a local link, a dichotomy method is used to determine a local node to be tested in the local link;

[0171] A new node device to be detected is determined according to the local node to be detected, and the node device to be detected is updated with the new node device to be detected.

[0172] In the process of using the binary search method to locate the fault of the faulty link, when the faulty link is a remote link, the binary search method is first used to determine the remote node to be tested, and then the test is performed in a loop manner, that is, the transceiver circuits are connected near the remote node to be tested, allowing the local network element to transmit and receive independently, and continue to obtain the current first indicator light state and the current second indicator light state of the fault detection circuit. At this time, the current first indicator light state and the current first indicator light state are obtained after the loop. Therefore, compared with the current first indicator light state and the current second indicator light state obtained before the loop, the current first indicator light state and the current second indicator light state are updated, and then, the faulty link is determined based on the updated current first indicator light state and the current second indicator light state.

[0173] Specifically, if the updated current first indicator light state and the current second indicator light state are both on, it means that the fault occurs on the link at the end of the remote node to be tested away from the broadband satellite. At this time, continue to use the binary search method to locate the fault link until the faulty node is located.

[0174] If the updated current first indicator light state and / or the current second indicator light state is dark, it indicates that the fault occurs in the link between the remote node to be tested and the broadband satellite. At this time, the binary search method is continued to be used to locate the fault in the faulty link until the faulty node is located.

[0175] In the process of locating the fault of a faulty link by using the binary search method, when the faulty link is a local link, the binary search method is used to determine the local node to be tested in the local link, and a new node device to be tested is determined based on the local node to be tested, that is, the local node device to be tested is determined as a new node device to be tested, and the new node device to be tested is used to update the node device to be tested, that is, the fault detection circuit is connected to the new node device to be tested, and the current first indicator light state and the current second indicator light state of the fault detection circuit are continuously obtained, as well as the subsequent process of determining the faulty link, until the node where the fault occurs is located.

[0176] The embodiment of the present application adopts the above-mentioned fault detection circuit to detect faults in the broadband satellite access network. When a fault occurs in the broadband satellite access network, the current first indicator light state and the current second indicator light state of the fault detection circuit connected to the node device to be detected of the broadband satellite access network are obtained; the node device to be detected is located at any node in the broadband satellite access network; the fault link is determined according to the current first indicator light state and the current second indicator light state, and the fault link is located by using the binary method; by combining the fault detection circuit and the binary method, the efficiency of fault location can be improved.

[0177] The fault detection method provided in the embodiment of the present application can accurately locate the fault location and give a judgment result in the first time, which is convenient for emergency handling of circuit faults and can meet the extremely high timeliness requirements of emergency communications.

[0178] In order to facilitate those skilled in the art to understand the fault detection method provided in the embodiment of the present application, Figure 12-13 The fault detection method provided in the embodiment of the present application is exemplarily explained and illustrated.

[0179] Fig.12 This is a schematic diagram of the location of fault detection in the mobile communication satellite access network; Fig.13 This is a schematic diagram of the fault detection location of the mobile communication 4G satellite access system. Fig.13 The detection principle and Fig.12 The detection principle is similar to that of Fig.12 The fault detection method provided in the embodiment of the present application is exemplarily described.

[0180] If the network administrator finds that the eNodeB cannot be connected, he can check the monitor function in the satellite system modem to view the status of the local satellite system. If the status of the local satellite is normal, it can be determined that the fault occurred at the remote end.

[0181] Specifically, use the test circuit, connect the test circuit to the upper end of the eNodeB, connect the first signal interface P1 and the second signal interface P2 to the transmitting end TX and the receiving end RX of the eNodeB, read the status of the first indicator light D1 and the second indicator light D2, and make a judgment by comparing with the circuit status relationship table. If there is no fault (the first indicator light D1 and the second indicator light D2 are both on), it means that the local link between the eNodeB and the broadband satellite is normal, and it can be determined that the fault occurs in the remote link, that is, the fault occurs in Fig.12 In the link containing the MSC node on the left side of the medium broadband satellite. If there is a fault (the first indicator light D1 and / or the second indicator light D2 are dark), it means that the local link has a fault. If the first indicator light D1 is bright and the second indicator light D2 is dark, it means that the link on the receiving end side of the eNodeB in the local link has a fault. Then, the first signal interface P1 and the second signal interface P2 in the fault detection circuit can be connected to the transmitting end TX and the receiving end RX of the DDF respectively, and the status of the first indicator light D1 and the second indicator light D2 can be read in the same way, and the judgment can be made by comparing with the circuit status relationship table.

[0182] Similarly, based on the status of the indicator light, you can determine whether it is a remote link fault or a local link fault.

[0183] If the fault is remote, you can also use a tester and adopt the transmission link fault handling binary method to perform fault diagnosis. The so-called binary method is to continuously disconnect the suspected transmission fault link, including all network elements, from the middle to split the link into two, and then locate the fault separately, excluding the fault-free link, until the fault unit that cannot be divided is found.

[0184] like Fig.12 , in the middle position of the link, the "loop detection position H" disconnects the link, makes a loop toward the satellite, continues to observe the status of the indicator light on the fault detection circuit, checks the circuit status relationship table, if no fault is found, straightens the loop, continues to use the binary search method, makes a loop at the "soft loop point N" position, observes the status of the indicator light on the fault detection circuit, checks the circuit status relationship table, if no fault is found, straightens the loop, continues to use the binary search method, makes a loop at the "soft loop point S", the optical path fault between the upper endpoint optical path N to S can be located, then continue to use the binary search method from the "soft loop point R" to continue to judge, if it is not the above fault, then it can be finally determined that the "soft loop point S" to the BSC side interface fault or data configuration error.

[0185] In order to accurately judge the circuit fault, the link position of each network element A, B, C, ... shown in the figure can be disconnected by disconnecting the link and then looping the receiving and transmitting signals. If it is an optical path, only a soft loop can be made, while the circuit part can be a soft loop or directly looped on the physical circuit, which is called a hard loop. Then add the fault detection circuit of this application on the DDF side, use the transmission link fault repair dichotomy method, locate the fault according to the status displayed by the indicator light in the fault detection circuit, and look up the circuit status relationship table.

[0186] It should be noted that, for the method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present application are not limited by the described order of actions, because according to the embodiments of the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.

[0187] Reference Fig.14 , shows a structural block diagram of an embodiment of a fault detection device of the present application, corresponding to the above-mentioned fault detection method embodiment, in the embodiment of the present application, the fault detection device may include the following modules:

[0188] The indication status acquisition module 1401 is used to acquire the current first indicator light status and the current second indicator light status of the fault detection circuit connected to the node device to be detected of the broadband satellite access network when a fault occurs in the broadband satellite access network; wherein the fault detection circuit is the fault detection circuit described in any of the above embodiments, and the node device to be detected is located at any node in the broadband satellite access network;

[0189] A faulty link determining module 1402, configured to determine a faulty link according to the current first indicator light state and the current second indicator light state;

[0190] The target fault location module 1403 is used to locate the fault of the faulty link by using a binary method.

[0191] Optionally, the broadband satellite access network includes a local link where the node device to be detected is located, and a remote link connected to the node device to be detected via a broadband satellite; the device status judgment module 1402 may include:

[0192] A first determination submodule, configured to determine that the remote link is a faulty link when both the current first indicator light state and the current second indicator light state are on;

[0193] The second determining submodule is used to determine that the local link is a faulty link when the current first indicator light state or the current second indicator light state is dark.

[0194] Optionally, the device may further include:

[0195] A relationship table acquisition module, used for acquiring a circuit state relationship table when the current first indicator light state or the current second indicator light state is in a dark state, wherein the circuit state relationship table is used for recording the association relationship between the first indicator light state and the second indicator light state and the cause of the fault;

[0196] The fault cause determination module is used to search the circuit state relationship table according to the current first indicator light state and the current second indicator light state to determine the target fault cause.

[0197] Optionally, the target fault location module 1403 may include:

[0198] A looping submodule, used for, when the faulty link is a remote link, determining a remote node to be tested in the remote link by using a binary search method, and looping toward the broadband satellite;

[0199] A loop test submodule, used for updating the current first indicator light state and the current second indicator light state of the fault detection circuit, and continuing to determine the faulty link according to the current first indicator light state and the current second indicator light state;

[0200] A local node determination submodule, used for determining a local node to be tested in the local link by using a dichotomy method when the faulty link is a local link;

[0201] The node device to be detected updating submodule is used to determine a new node device to be detected according to the local node to be detected, and use the new node device to be detected to update the node device to be detected.

[0202] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0203] The embodiment of the present application also discloses a fault detection system, which includes a broadband satellite access network and the fault detection device described above.

[0204] An embodiment of the present application also discloses an electronic device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program implements the fault detection method as described above when executed by the processor.

[0205] The embodiment of the present application further discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the fault detection method as described above is implemented.

[0206] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0207] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, devices, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0208] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0209] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0210] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0211] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0212] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0213] The above is a detailed introduction to a fault detection circuit, instrument, method, device, system, equipment and medium provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A fault detection circuit, characterized in that: Used to detect faults in broadband satellite access networks; The fault detection circuit comprises: a first signal interface, a second signal interface, a first indicator light, a second indicator light and a reverse blocking module; The first signal interface is used to connect to the transmitting end of the node device to be detected of the broadband satellite access network; The second signal interface is used to connect to the receiving end of the node device to be detected; The first indicator light has unidirectional conductivity, the positive electrode of the first indicator light is connected to the first signal interface; the negative electrode of the first indicator light is grounded through a first protection resistor; The second indicator light has unidirectional conductivity, the positive electrode of the second indicator light is connected to the second signal interface through a second protection resistor; the negative electrode of the second indicator light is connected to the first signal interface; The reverse blocking module is connected in parallel with the second indicator light; Wherein, the first indicator light and the second indicator light are both light emitting diodes, and the reverse blocking module includes a PNP transistor, an NPN transistor, and a diode; The base of the PNP transistor is connected to the second signal interface via a third protection resistor, the emitter of the PNP transistor is grounded, and the collector of the PNP transistor is connected to the first signal interface via a fourth protection resistor; The base of the NPN transistor is connected to the collector of the PNP transistor through a fifth protection resistor; the collector of the NPN transistor is grounded, the emitter of the NPN transistor is connected to the anode of the diode through a sixth protection resistor, and the cathode of the diode is connected to the first signal interface.

2. The fault detection circuit according to claim 1, characterized in that: The first signal interface and the second signal interface have a shielding layer.

3. The fault detection circuit according to claim 1, characterized in that: The first signal interface and the second signal interface include at least any one of a 25-pin data interface, a digital circuit BNC data interface, a 15-pin data interface, and an RJ45 interface.

4. A fault detection instrument, characterized in that: It comprises a housing and a fault detection circuit as described in any one of claims 1 to 3, wherein the fault detection circuit is integrated in the housing, and the housing is provided with a first mounting interface connected to the first signal interface, and a second mounting interface connected to the second signal interface.

5. A fault detection method, characterized in that: The method comprises: When a fault occurs in the broadband satellite access network, a current first indicator light state and a current second indicator light state of a fault detection circuit connected to a node device to be detected of the broadband satellite access network are obtained; wherein the fault detection circuit is the fault detection circuit according to any one of claims 1 to 3; Determine a faulty link according to the current first indicator light state and the current second indicator light state; A binary search method is used to locate the fault of the faulty link.

6. The method according to claim 5, characterized in that The broadband satellite access network includes a local link where the node device to be detected is located, and a remote link connected to the node device to be detected via a broadband satellite; the determining of the faulty link according to the current first indicator light state and the current second indicator light state includes: When the current first indicator light state and the current second indicator light state are both in a bright state, determining that the remote link is a faulty link; When the current first indicator light state or the current second indicator light state is dark, it is determined that the local link is a faulty link.

7. The method according to claim 6, characterized in that The method further comprises: When the current first indicator light state or the current second indicator light state is in a dark state, a circuit state relationship table is obtained, wherein the circuit state relationship table is used to record the association relationship between the first indicator light state and the second indicator light state and the fault cause; The circuit state relationship table is searched according to the current first indicator light state and the current second indicator light state to determine the target fault cause.

8. The method according to claim 6, characterized in that The adopting the binary method to locate the fault of the faulty link includes: When the faulty link is a remote link, a remote node to be tested in the remote link is determined by a binary search method, and a loop is made toward the broadband satellite; Updating the current first indicator light state and the current second indicator light state of the fault detection circuit, and continuing to determine the faulty link according to the current first indicator light state and the current second indicator light state; When the faulty link is a local link, a dichotomy method is used to determine a local node to be tested in the local link; A new node device to be detected is determined according to the local node to be detected, and the node device to be detected is updated with the new node device to be detected.

9. A fault detection device, characterized in that: The device comprises: An indication status acquisition module, used for acquiring a current first indicator light status and a current second indicator light status of a fault detection circuit connected to a node device to be detected of the broadband satellite access network when a fault occurs in the broadband satellite access network; wherein the fault detection circuit is the fault detection circuit according to any one of claims 1 to 3; A faulty link determination module, configured to determine a faulty link according to the current first indicator light state and the current second indicator light state; The target fault location module is used to locate the fault of the faulty link by using a binary method.

10. A fault detection system, characterized in that: It comprises a broadband satellite access network and the fault detection device as claimed in claim 9.

11. An electronic device, characterized in that: include: A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the fault detection method according to any one of claims 5 to 8.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the fault detection method according to any one of claims 5 to 8 is implemented.

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