Communication cable detection device
By introducing a signal transmitting device and a silicon controlled rectifier circuit into the communication cable testing device, combined with LED indicator lights, real-time continuity quality testing of the cable is achieved, solving the problem that existing technologies cannot detect momentary poor contact and ensuring the safe operation of the equipment.
Patent Information
- Application Number
- CN202422675350.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-11-01
AI Technical Summary
Existing communication cable testing devices can only detect the static continuity of cables and cannot effectively detect momentary poor contact or open circuits, which poses a potential risk to the safe operation of equipment.
Design a communication cable testing device, which uses a testing circuit composed of a signal transmitter, a silicon controlled rectifier (SCR), and a light-emitting diode (LED). The transmitter sends a pulse signal to the cable, and the SCR and current-limiting resistor are used to detect the conductivity of the wire core. The test results are displayed by LED indicator lights.
It enables real-time continuity quality detection of communication cables, and can quickly and accurately identify stability issues of wire cores and connectors, ensuring the safe operation of equipment.
Smart Images
Figure CN223756895U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to communication cable detection device field. BACKGROUND
[0002] Communication cable is the network main body of communication circuit, and there is no communication circuit without cable. Cable refers to the assembly of connecting circuit formed by cable ligation after the terminal of contact piece made of copper material is pressure connected with electric wire and cable, and the outside is further pressure insulated or additional metal shell. Cable industry chain includes electric wire and cable, connector, processing equipment, cable manufacturing and downstream application industry, and cable is widely applied in communication, household appliance, computer and communication equipment, various electronic instruments and the like.
[0003] In the production process of communication cable, each core wire in the cable needs to be detected, and whether each core wire is reliably connected with the connector also needs to be detected.
[0004] At present, when the communication cable is detected, two core wires in the communication cable are generally detected at the same time, the distal ends of the two core wires are short-circuited, and the two core wires are detected at the proximal end. If there is no open circuit, it indicates that the two core wires are normal. However, such a detection method is not very intuitive. At present, in order to intuitively reflect the detection result of each core wire of the cable, an LED lamp is used. When the LED lamp is on, it indicates that there is no open circuit. For example, a detection device currently includes a detection host and a detection slave. The detection host and the detection slave are respectively provided with an interface connected with a communication cable to be detected. When detecting, the communication cable to be detected is connected between the detection host and the detection slave. On the detection host side, a signal transmitting device is arranged, such as a 10Hz square wave signal transmitted from the host detection interface to the slave. A ground wire is arranged in the communication cable to be detected. When the two ends of the communication cable to be detected are respectively inserted into the detection interfaces of the detection host and the detection slave, the ground of the detection host is connected with the ground of the detection slave. In the detection machine, each core wire is connected with the ground. The LED is arranged at any position between the host transmitting end, the host detection interface, the core wire, the slave detection interface and the slave ground. At this time, the machine is started, and the detection host transmits the 10Hz square wave signal to the slave through the different core wires in turn. If the detection is performed, the last core wire in the detection port is connected with the ground wire through the corresponding pin of the host detection port. The pin on the host detection port is connected with the ground wire of the transmitting device. At the same time, the LED lamp is installed on the detection slave. The LED is arranged between the slave detection interface and the slave ground of the slave.
[0005] The above device for detecting communication cable can intuitively obtain whether each core wire in the communication cable is normal, but only detects the static state, and the phenomenon of occasional poor contact or instantaneous open circuit cannot be detected, which brings hidden danger to the safe operation of the equipment and brings difficulty to the maintenance of the equipment. CONTENT OF THE UTILITY MODEL
[0006] The utility model solves the technical problem of designing a communication cable detection device, which can detect the continuity of the communication line and the stability and reliability of the communication joint and each core wire.
[0007] The utility model discloses a technical scheme for achieving the technical purpose: a communication cable detection device, including detection host computer and detection vice machine, the detection host computer has first joint, and the detection vice machine has second detection joint, and the two ends of the communication cable to be measured are connected with the detection host computer and the detection vice machine by the first joint and the second detection joint respectively.
[0008] Further, the communication cable detection device described above: the transmitting device includes a pulse generator and a decimal counting module; the pulse output end of the pulse generator is connected with the CLK end of the decimal counting module, and the output end of the decimal counting module constitutes the output end of the transmitting device and is connected with the gate electrode of the thyristor Vi.
[0009] Further, the communication cable detection device described above: a diode Di is further arranged between the output end of the transmitting device and the anode of the thyristor Vi.
[0010] Further, the communication cable detection device described above: a current-limiting resistor Ri is further arranged between the cathode of the thyristor Vi and the i-th core wire in the first joint.
[0011] Further, the communication cable detection device described above: a light-emitting diode Li is arranged between the current-limiting resistor Ri and the i-th core wire in the first joint.
[0012] Further, the communication cable detection device described above: a switch tube Q1 is further arranged between the pulse output end of the pulse generator and the CLK end of the decimal counting module, and the switch tube Q1 is controlled by the last or the second last bit output end of the decimal counting module, and the switch tube Q1 is disconnected when the last or the second last bit output end of the decimal counting module outputs a high level.
[0013] Further, the communication cable detection device has the following features: the communication cable to be detected is a 10-core cable, one shielded wire and nine core wires; and the counter is a decimal counter.
[0014] Further, the communication cable detection device has the following features: the pulse generator is a NE555, and the decimal counter is a 4017.
[0015] The utility model not only can detect the on-off of communication line, but also can detect whether the conduction quality of communication joint and each core wire is stable and reliable.
[0016] The utility model will be further described in combination with the drawings and specific embodiments. DRAWINGS
[0017] The utility model discloses a communication cable detection device principle block diagram for example 1. Figure 1
[0018] The utility model discloses a host appearance drawing for example 1. Figure 2
[0019] The utility model discloses a slave appearance drawing for example 1. Figure 3 DETAILED DESCRIPTION For example, the utility model discloses a communication cable detection device.
[0020] And Figure 1 , Figure 2 , Figure 3 The embodiment is a detection device for an eight-core communication cable, which comprises a detection host and a detection slave. The detection host is provided with a first joint 1, and the detection slave is provided with a second detection joint 3. Two ends of the communication cable to be detected 2 are connected to the detection host and the detection slave by the first joint 1 and the second detection joint 3 respectively. The eight-core cable to be detected has eight core wires and a shielding wire G. Hereinafter, the core wire i is the ith core wire in the eight core wires, where i is the serial number of the core wire, and the maximum is 8. In other embodiments, if a ten-core cable is detected, the serial number is 10 at most. According to the number of core wires of the telecommunication cable to be detected, a signal transmitting device is included in the detection host, and the telecommunication cable to be detected includes a shielding wire G and other core wires. In the detection slave, a light-emitting diode L1 i is arranged between the core wire i and the shielding wire G. In the detection host, the ground of the signal transmitting device is connected to the shielding wire G, and the output end of the transmitting device is connected to the core wire i in the telecommunication cable to be detected. The device is characterized in that a thyristor Vi is further included, the gate and the cathode of the thyristor Vi are connected to the output end of the transmitting device and the core wire i in the first joint 1 respectively, and the anode of the thyristor Vi is connected to the positive electrode of the power supply. I is a natural number, which is the serial number of the core wire in the telecommunication cable to be detected. In practice, a loop is formed between the transmitting device, the first joint 1, the telecommunication cable to be detected 2, the second joint 3, the shielding wire G and the ground. The telecommunication signal flows in the loop. In the embodiment, the transmitting device includes an N555 pulse generator and a 7014 decimal counting module. The pulse output end of the pulse generator is connected to the CLK end of the counting module, and the output end of the counting module constitutes the output end of the transmitting device and is connected to the gate of the thyristor Vi. The 0-7 output end of the 7014 decimal counting module is connected to the first to eighth core wires in the eight-core cable, that is, the core wire 1, the core wire 2, the core wire 3, …, and the core wire 8.
[0021] The present application aims to design a detection device suitable for communication network cables. The device can not only detect the continuity of the communication cable, but also detect whether the communication joint and the conductivity of each core wire are stable and reliable. In this way, sudden failures caused by unstable conductivity of the communication network cable can be quickly and accurately investigated, and the safe operation of the equipment can be ensured.
[0022] The device of the embodiment comprises a detection host and a detection slave. The joint of the communication cable to be detected 2 is respectively inserted into the first joint 1 and the second joint 3 on the detection host and the detection slave. The detection host is composed of a shell, an internal circuit and the first joint 1. The host panel includes a power switch (Off / On), a switching switch (Scan / Hold) and a reset switch (Reset). The detection slave is composed of a shell, a circuit and a network cable socket, and does not have a control switch.
[0023] The detection host, detection slave circuit and each wire core of the measured cable are connected in series to form a multi-path parallel circuit. The host sends a pulse to scan each network wire core one by one. If the wire core is conductive, the LED indicator in the circuit flashes, indicating that the wire core is conductive, otherwise, the circuit is broken. By observing whether the LED of each path flashes, it can be preliminarily judged whether the wire core is conductive. At the same time, by observing the flashing order and position of the LED lights on the detection host and detection slave, it can be judged whether the connection and wire core correspondence is correct. If the 8-way LED indicator does not light up, it needs to be checked whether the shielding layer of the cable being detected is conductive, or whether the detection device is faulty, because the possibility of all 8 wire cores being broken is very low.
[0024] After completing the line detection, the stability of the wire core and the joint can be further detected, whether there is a poor contact condition. The implementation method is: each wire core detection circuit contains a small power thyristor, the anode of the thyristor is connected through a switch and a power supply. When the switch is closed, the anode of the thyristor and the positive electrode of the power supply are connected. Once the thyristor is conductive, it will not be turned off because of the disappearance of the pulse. The circuit always remains in the conductive state, that is, the LED light on the host and the slave is always on, indicating that the line is continuously conductive and stable. If there is a poor contact condition in the wire core or joint of a certain path, the current will be less than the minimum holding current of the thyristor, and the thyristor will immediately turn off, and the LED will be off. By observing whether the LED light is always on, it can be judged whether the conduction of each wire core of the detected communication cable is reliable and stable.
[0025] The host circuit also uses a PNP transistor Q1 as a switch. When Y8 outputs a high level, the base of Q1 connected to Y8 is disconnected, cutting off the pulse from NE555 to the 4017 module, so that the 4017 module stops outputting pulses to avoid interfering with the judgment of conduction stability. A reset button K1 is set. Press the reset button once, and the transistor Q1 is turned on, and the 4017 counting module resumes outputting pulses. In practice, the transistor Q1 can be controlled to be turned off after counting to the last digit in the counting module. Therefore, many times it is turned off when the last digit is high. In fact, only 8 bits are used in the decimal counter, so the transistor Q1 can also be turned off when the second last digit is high.
[0026] As Figure 1As shown, the detection host circuit comprises a power supply, a switch, a NE555 pulse generator, a 4017 decimal counting module, resistors, capacitors, and a shielded RJ45 socket. Since the embodiment is used to detect an eight-core communication cable, a decimal counting module is used. In fact, the device of the embodiment can also be used when a nine-core communication cable or a ten-core communication cable is used. If more cores are used, such as twelve cores, thirteen cores, or fifteen cores, a hexadecimal counter can be used. If more cores are used, the counter is multiplied and more output pins are provided.
[0027] The pulse generator composed of the NE555 and resistors and capacitors generates a pulse of about 2 Hz (which can be adjusted by an adjustable resistor) to trigger the clock end (CLK) of the 4017 module, so that the 4017 sequentially outputs high levels from the Y0 to Y9 output ends. For example, when the first pulse is generated, the output end Y0 is at a high level and the other output ends are at low levels. When the second pulse is generated, the output end Y1 is at a high level and the other output ends are at low levels. When the third pulse is generated, the output end Y2 is at a high level and the other output ends are at low levels. In this way, when the tenth output end Y9 is at a high level, the output end Y0 is again at a high level. As long as the pulses are continuously generated, the cycle is not stopped. This part is not the content of the present application, and thus is not described in detail.
[0028] As shown in Figure 1 , in the detection host circuit, V1 to V8 are eight small power thyristors. The anodes of the thyristors are connected to the positive pole of the power supply through the switch K1. The gates of the thyristors are connected to Y0 to Y7 through current-limiting resistors. The cathodes of the thyristors are connected to current-limiting resistors R1 to R8 and light-emitting diodes L1 to L8 in series to form eight loops. The ends of the eight loops are connected to the eight pins of the RJ45 socket. The negative pole of the power supply is connected to the shell of the RJ45 socket as a common end, such as the G terminal of Figure 1 .
[0029] The detection host circuit further comprises eight diodes D1 to D8. Y0 to Y7 supply power to the anodes of the eight thyristors through the eight diodes.
[0030] As shown in Figure 1 , the detection slave circuit comprises eight LED indicator lamps 1i of the same specification as the host. The anodes of the eight LED indicator lamps are connected to the eight pins of the RJ45 socket, and the cathodes are connected to the common end, that is, the shell of the RJ45 socket, such as the G terminal of Figure 1 .
[0031] Figure 2 The panel comprises a switch and eight indicator lamps L1 to L8, that is, Figure 1 , and the top end face is an RJ45 socket.
[0032] Figure 3To detect the appearance of the secondary machine, the top side contains an RJ45 socket, and the panel has 8 indicator lights from 1 to 8. Figure 1 L11-L18.
[0033] The shield layer of the detected line and the shell of the RJ45 connector form a common line. When the two ends of the detected line are inserted into the RJ45 sockets of the host and the secondary machine, the internal core of the detected line and the circuits of the host and the secondary machine together form a circuit as shown in Figure 1 In this embodiment, resistors R11-R20 are selected to be large resistance resistors greater than 1000Ω, which are used for current limiting and protection of the transistor trigger signal.
[0034] The power supply is selected to be 5-9V, and the output voltage of the 4017 counting module is close to the power supply voltage. The current limiting resistors R1-R8 are selected to have appropriate resistance values, so that the LED indicator lights in the circuit can be normally lit, and the brightness is soft and not dazzling.
[0035] When K is closed (corresponding to Figure 1 the switch On), K0 is open (corresponding to Figure 2 the switch Scan), the power indicator light L is on, NE555 starts to output pulses, and the 4017 counting module outputs high levels from Y0-Y9 output terminals in turn. When Y0 outputs a high level, the circuit formed by the series connection of the thyristor V1, R1 and L1 of the host, the first core of the detected network line, L11 of the secondary machine, and the shield layer of the detected network line is conducted, generating a current, and the indicator lights L1 on the host and L11 on the secondary machine are lit at the same time, indicating that the first core of the detected network line and the connector are normal. If they are not lit, it indicates that the core or the connector corresponding to this circuit is not working and has a fault. After Y0 high level output ends, L1 and L11 are extinguished, and Y1 outputs a high level. At this time, if L2 and L12 are lit, it indicates that the second core of the detected line and the connector are normal. In this way, when Y7 outputs a high level, the eighth core and L8 and L18 are lit at the same time, and thus the eight cores of the detected network line are scanned once. In this process, whether each core of the detected line is conducted and whether the corresponding connector pins and cores are correct can be judged by observing whether the 8-way indicator lights on the host and the secondary machine are lit.
[0036] After completing the line detection, K0 is also closed (corresponding to Figure 2The switch Hold) can further detect the stability of the core and the joint. At this time, the anode of the thyristor V1-V8 is connected through K0, K and the positive electrode of the power supply. When Y0-Y7 of the 4017 module outputs high level in turn, V1-V8 will be triggered to conduct in turn. If the circuit is normal, once it is turned on, it will not be turned off due to the disappearance of the high level of Y0-Y7, and the circuit will always remain in the on state, that is, each LED indicator on the host and the secondary machine is always on. If there is a poor contact in a core or a joint, the current of the corresponding circuit will be less than the minimum holding current of the thyristor, and the thyristor of the circuit will be immediately cut off, and the LED indicator connected in series with it will be turned off. Therefore, by observing whether the LED indicator of each circuit can keep on, it can be judged whether the cores and joints of the detected communication network line are reliable and stable.
[0037] During the detection process, when the LED indicator of each circuit is always on, the examiner can shake different parts of the detected line or the joint to capture the location of the poor contact of the communication cable. For example, when a certain part of the cable or a certain joint is shaken, the LED indicator is turned off, which indicates that this place is likely to be the fault of the cable. Repeated operation can improve the accuracy of diagnosis. This function is very practical for on-site troubleshooting of line faults.
[0038] When Y8 of 4017 outputs high level, PNP type triode Q1 is turned off, cutting off the pulse of CLK terminal of NE555 to 4017 module, and 4017 module stops scanning, Y8 remains high level, so Q1 remains off state. The function of this function is to let 4017 stop scanning. Because when V1-V8 are activated and turned on one by one, Y0-Y7 do not need to output high level again, if high level is output again, it will interfere with the judgment of the stability of the conduction. If you want to scan again, press K1 (K1 is a normally open self-resetting button switch, corresponding Figure 1 Reset), at this time Q1 is turned on due to the connection of the base and the negative electrode, the pulse of NE555 restores the CLK terminal of 4017 module, 4017 restores the cycle scanning, Y8 high level ends, then Y9, Y0, Y1, Y2, …, Y7 outputs high level in turn, until Y8 outputs high level again, Q1 is turned off, 4017 stops scanning again. That is, each time the Reset switch is pressed, the host is scanned once. The operation is simple and efficient.
Claims
1. A communication cable detection device, comprising a detection host and a detection slave, the detection host having a first connector (1) thereon, the detection slave having a second detection connector (3) thereon, two ends of a communication cable (2) to be detected being connected to the detection host and the detection slave by the first connector (1) and the second detection connector (3) respectively; a signal emitting device being included in the detection host, the communication cable to be detected including a shielding wire (G) and other core wires, a light emitting diode L1i being arranged between a core wire i and the shielding wire (G) in the detection slave, the ground of the signal emitting device being connected to the shielding wire (G) in the detection host, and the output end of the signal emitting device being connected to the core wire i in the communication cable to be detected respectively; characterized in that: Also included is a thyristor Vi, the gate and cathode of which are connected to the output of the transmitting device and the core wire i in the first joint (1) respectively, and the anode of which is connected to the positive pole of the power supply; i is a natural number, which is the serial number of the core wire in the communication cable to be tested.
2. The communication cable detection apparatus of claim 1, wherein: The transmitting device includes a pulse generator and a counting module; the pulse output end of the pulse generator is connected to the CLK end of the counting module, and the output end of the counting module constitutes the output end of the transmitting device and is connected to the gate of the thyristor Vi.
3. The communications cable detection apparatus of claim 2, wherein: A diode Di is further arranged between the output end of the transmitting device and the anode of the thyristor Vi, and the anode of the diode Di is connected to the output end of the transmitting device.
4. The communications cable detection apparatus of claim 3, wherein: A current-limiting resistor Ri is further arranged between the cathode of the thyristor Vi and the i-th core wire in the first joint (1).
5. The communications cable detection apparatus of claim 4, wherein: A light-emitting diode Li is arranged between the current-limiting resistor Ri and the i-th core wire in the first joint (1).
6. The communications cable detection apparatus of claim 5, wherein: A switch tube Q1 is further arranged between the pulse output end of the pulse generator and the CLK end of the decimal counting module, and the switch tube Q1 is controlled by the last bit output end of the decimal counting module, and the switch tube Q1 is turned off when the last bit output end of the decimal counting module outputs a high level.
7. The communications cable detection apparatus of claim 6, wherein: The communication cable to be tested is a 10-core cable, one shielded wire (G) and nine core wires; and the counting module is a decimal counter.
8. The communications cable detection apparatus of claim 7, wherein: The model of the pulse generator is NE555, and the model of the decimal counter is 4017.