Cable on-off detection device

Abstract

The utility model provides a cable on-off detection device which comprises a cable interface module, a logic control module and an indication module, one end of a cable to be detected is electrically connected with the input end of the cable interface module, and the other end of the cable to be detected is electrically connected with the logic control module; the logic control module is provided with a plurality of test interfaces; one end of the indication module is electrically connected with the output end of the cable interface module, the other end is electrically connected with the power supply end, and the indication module is provided with a plurality of light-emitting parts; the number of the light-emitting parts is the same as that of the test interfaces and the leads of the to-be-tested cable, and the logic control module is used for sequentially switching the test interfaces and controlling the corresponding light-emitting parts to be turned on or off so as to indicate the on-off of the corresponding leads of the to-be-tested cable; the cable testing efficiency is improved, the cable connection state can be simply and visually shown, a user can conveniently judge whether the cable is connected or disconnected and whether missing connection and wrong connection occur or not, and cable detection and use are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of cable testing technology, and in particular to a cable continuity testing device. Background Technology

[0002] When working on the assembly site, proper cable wiring is crucial for ensuring the stable operation of the entire system. However, due to the complexity of the assembly site environment, the variety of cable types, and the uncertainty of human operation, it is often difficult to guarantee that every cable is connected accurately. Therefore, conducting continuity tests on the cables becomes an indispensable preliminary task.

[0003] Publication number CN211505837U discloses a continuity testing device supporting multiple types of cables, including: a cable input module, an LED indicator module, and a power supply module. The input end of the cable input module is connected to the cable under test, and the output end is connected to the input end of the LED indicator module. The power supply module is connected to the LED indicator module. The cable input module includes Slimline cable interfaces CON1 and CON2, MiniSAS cable interfaces CON3 and CON4, and Oculink cable interfaces CON5 and CON6. The LED indicator module includes a first group of LED indicator lights connected to the Slimline cable interface, a second group of LED indicator lights connected to the MiniSAS cable interface, and a third group of LED indicator lights connected to the Oculink cable interface.

[0004] Currently, cable continuity testing requires testing the continuity of each cable individually. Existing testing methods are inefficient and cannot simply and intuitively represent the cable connection status, thus causing inconvenience to cable testing. Utility Model Content

[0005] In view of this, the present invention proposes a cable continuity detection device, which improves the efficiency of cable testing and can simply and intuitively display the cable connection status, making it convenient for users to judge the continuity of the cable, whether there are missing connections or incorrect connections, and facilitating cable testing.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a cable continuity detection device, including a cable interface module, a logic control module, and an indicator module, wherein,

[0007] One end of the cable under test is electrically connected to the input terminal of the cable interface module, and the other end is electrically connected to the logic control module; the logic control module has several test interfaces.

[0008] One end of the indicator module is electrically connected to the output end of the cable interface module, and the other end is electrically connected to the power supply end. The indicator module has several light-emitting parts.

[0009] The number of light-emitting parts, test interfaces, and wires of the cable under test are the same and correspondingly set. The logic control module is used to switch the test interfaces sequentially and control the corresponding light-emitting parts to turn on and off, so as to indicate the continuity of the corresponding wires of the cable under test.

[0010] Based on the above technical solutions, preferably, the logic control module includes a mode switching switch, a button input unit, a timing pulse unit, and a logic control unit, wherein,

[0011] The mode switching switch has two input terminals and one output terminal; the output terminals of the button input unit and the timing pulse unit are electrically connected to the corresponding input terminals of the mode switching switch; the output terminal of the mode switching switch is electrically connected to the input terminal of the logic control unit, and the mode switching switch is used to switch the signal input mode of the logic control unit.

[0012] Based on the above technical solution, preferably, the button input unit includes a jog button SB2, resistors R35, R36, and R37, and an optocoupler U10. One end of the jog button SB2 is electrically connected to resistors R35 and R36, and the other end of the jog button SB2 is electrically connected to the power supply terminal. The other end of resistor R35 is electrically connected to the positive input terminal of optocoupler U10. The positive output terminal of optocoupler U10 is electrically connected to the power supply terminal. The negative output terminal of optocoupler U10 serves as the output terminal of button input unit 22 and is electrically connected to one end of resistor R37. The other end of resistor R36 is grounded together with the negative input terminal of optocoupler U10 and the other end of resistor R37.

[0013] Based on the above technical solution, preferably, the timing pulse unit includes a time base chip U1, a resistor R33, a capacitor C2, a capacitor C1, and an adjustment resistor RP1. Pin 7 of the time base chip U1 is electrically connected to one end of the resistor R33 and the adjustment resistor RP1, respectively. The other end of the adjustment resistor RP1 is electrically connected to pin 8, pin 4 of the time base chip U1, and the power supply terminal, respectively. The other end of the resistor R33 is electrically connected to pin 2, pin 6 of the time base chip U1, and the capacitor C2, respectively. Pin 5 of the time base chip U1 is electrically connected to the capacitor C1. The other end of the capacitor C2 is grounded along with pin 1 of the time base chip U1 and the other end of the capacitor C1. Pin 3 of the time base chip U1 serves as the output terminal of the timing pulse unit.

[0014] Based on the above technical solutions, preferably, the logic control unit includes counter U2, counter U3, inverter U11A, capacitor C3, resistor R34, OR gate U4A, AND gate U5A, decoder U6, decoder U7, decoder U8, decoder U9, and reset button SB1, wherein,

[0015] Pin 1 of counter U2 is electrically connected to resistor R34, capacitor C3, reset button SB1, and pin 1 of counter U3, respectively. Pin 2 of counter U2 serves as the input terminal of logic control unit 24. Pins 3, 4, 5, and 6 of counter U2 are grounded. Pin 7 of counter U2 is electrically connected to pins 9 and 10 of counter U2, the other end of resistor R34, pins 7, 9, and 10 of counter U3, and the power supply terminal, respectively. Pin 15 of counter U2 is electrically connected to the input terminal of inverter U11A. The output of inverter U11A is electrically connected to pin 2 of counter U3. The ground terminal of inverter U11A is connected to the other end of capacitor C3, the other end of reset button SB1, and pins 3, 4, 5, and 6 of counter U3 for common ground. Pin 14 of counter U2 is electrically connected to pin 1 of decoders U6, U7, U8, and U9. Pin 13 of counter U2 is electrically connected to pin 2 of decoders U6, U7, U8, and U9. Pin 12 of counter U2... Pin 11 of counter U2 is electrically connected to pin 3 of decoders U6, U7, U8, and U9, respectively. Pin 11 of counter U2 is electrically connected to the non-inverting input of OR gate U4A, the non-inverting input of AND gate U5A, pin 6 of decoder U7, and pins 5 and 4 of decoder U8, respectively. The output of OR gate U4A is electrically connected to pins 5 and 4 of decoder U6. The inverting input of OR gate U4A is electrically connected to the inverting input of AND gate U5A, pin 14 of counter U3, pin 6 of decoder U8, and pins 5 and 4 of decoder U7, respectively. 4. Electrical Connections: The output of AND gate U5A is electrically connected to pin 6 of decoder U9. The power supply terminals of counters U2, U3, OR gate U4A, AND gate U5A, decoders U6, U7, U8, and U9 are connected to the common power input terminal. The ground terminals of counters U2, U3, OR gate U4A, AND gate U5A, decoders U6, U7, U8, and U9 are grounded together. The output terminals of decoders U6, U7, U8, and U9 serve as the test interface for the logic control module.

[0016] Based on the above technical solutions, preferably, the cable interface module includes a common port and several connection ports, wherein the common port and several connection ports each have several connection terminals, and the two ends of each connection terminal of the common port are electrically connected to the test interface of the logic control module and one end of each wire of the cable under test, respectively; the two ends of each connection terminal of the several connection ports are electrically connected to the other end of each wire of the cable under test and one end of the indicator module, respectively.

[0017] Based on the above technical solutions, preferably, the connection terminal of the common port is equal to the sum of the connection terminals of several connection ports, and the connection terminals of the common port are arranged in a one-to-one correspondence with the connection terminals of the connection ports.

[0018] Based on the above technical solutions, preferably, the light-emitting part of the indicator module is a light-emitting diode, the negative terminal of the light-emitting diode is electrically connected to the connection terminal of the connection port, and the positive terminal of the light-emitting diode is connected to the power supply terminal.

[0019] Based on the above technical solutions, preferably, it also includes a voltage regulator module, wherein the input terminal of the voltage regulator module is electrically connected to an external DC power supply, and the output terminal of the voltage regulator module serves as a power supply terminal and is electrically connected to the indicator module and the logic control module respectively.

[0020] Based on the above technical solution, preferably, the voltage regulator module includes a voltage regulator chip U12, a capacitor C14, a polarized capacitor C13, a polarized capacitor C15, a capacitor C16, and a diode D7. The input terminal of the voltage regulator chip U12 is electrically connected to the negative terminal of the diode D7, an external power supply, and the positive terminals of capacitors C14 and C13, respectively. The output terminal of the voltage regulator chip U12 is electrically connected to the positive terminal of the diode D7, the power supply terminal, the positive terminal of the polarized capacitor C15, and one end of capacitor C16, respectively. The negative terminal of the polarized capacitor C13, the other end of capacitor C14, and the other ends of polarized capacitors C15 and C16 are electrically connected and grounded together.

[0021] The cable continuity detection device of this invention has the following advantages over the prior art:

[0022] (1) By connecting one end of the cable under test to the input end of the cable interface module and the other end to each test interface of the logic control module, the logic control module controls the sequential switching of the test interfaces to test each wire of the cable. The logic control module outputs low-level signals in sequence. When the low-level signal is sent to the corresponding indicator module, if the light-emitting part lights up, it indicates that the corresponding wire of the cable under test is in a connected state, thereby improving the efficiency of cable testing and providing a simple and intuitive representation of the cable connection status. This makes it convenient for users to judge whether the cable is connected or disconnected, whether there are any missing or incorrect connections, and facilitates cable testing.

[0023] (2) The signal input mode can be switched by switching the mode switch. When the switching button input unit is connected to the logic control unit, the test cable channel can be switched by manually pressing the button. When the switching timing pulse unit is connected to the logic control unit, the test cable channel can be switched automatically. It can flexibly adapt to different test requirements, supporting both manual testing to improve the flexibility of operation and automatic testing to improve the efficiency and accuracy of testing. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a circuit structure block diagram of the cable continuity detection device of this utility model;

[0026] Figure 2 This is a block diagram of the logic control module of the cable continuity detection device of this utility model;

[0027] Figure 3 This is the circuit wiring diagram of the cable continuity detection device of this utility model;

[0028] Figure 4 This is a circuit diagram of the button input unit of the cable continuity detection device of this utility model;

[0029] Figure 5 This is a circuit diagram of the timing pulse unit of the cable continuity detection device of this utility model;

[0030] Figure 6 The circuit diagram is for the logic control unit of the cable continuity detection device of this utility model.

[0031] Figure 7 This is a circuit diagram of the voltage regulator module of the cable continuity detection device of this utility model. Detailed Implementation

[0032] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0033] like Figure 1-7As shown, this utility model discloses a cable continuity detection device, characterized in that it includes a cable interface module 1, a logic control module 2, and an indicator module 3. One end of the cable under test is electrically connected to the input end of the cable interface module 1, and the other end is electrically connected to the logic control module 2. The logic control module 2 has several test interfaces. One end of the indicator module 3 is electrically connected to the output end of the cable interface module 1, and the other end is electrically connected to the power supply end. The indicator module 3 has several light-emitting parts 31. The number of light-emitting parts 31 is the same as the number of test interfaces and the wires of the cable under test, and they are correspondingly arranged. The logic control module 2 is used to sequentially switch the test interfaces and control the corresponding light-emitting parts 31 to turn on and off, thereby indicating the continuity or disconnection of the corresponding wires of the cable under test.

[0034] In this embodiment, the user connects one end of the cable under test to the input terminal of the cable interface module 1, and the other end to the test interfaces of the logic control module 2. The logic control module 2 controls the sequential switching of test interfaces to test each wire of the cable. The logic control module 2 outputs low-level signals in sequence. When the low-level signal is sent to the corresponding indicator module 3, if the light-emitting part 31 lights up, it indicates that the corresponding wire of the cable under test is in a connected state, thereby improving the efficiency of cable testing and providing a simple and intuitive representation of the cable connection status. This makes it convenient for users to judge whether the cable is connected or disconnected, and whether there are any missing or incorrect connections, thus facilitating cable testing.

[0035] The logic control module 2 in this embodiment includes a mode switching switch 21, a button input unit 22, a timing pulse unit 23, and a logic control unit 24. The mode switching switch 21 has two input terminals and one output terminal. The output terminals of the button input unit 22 and the timing pulse unit 23 are electrically connected to the corresponding input terminals of the mode switching switch 21, respectively. The output terminal of the mode switching switch 21 is electrically connected to the input terminal of the logic control unit 24. The mode switching switch 21 is used to switch the signal input mode of the logic control unit 24.

[0036] It should be noted that the logic control module 2 switches the signal input mode through the mode switching switch 21. When the switching button input unit 22 is connected to the logic control unit 24, the test cable channel can be switched by manually pressing the button. When the switching timing pulse unit 23 is connected to the logic control unit 24, the test cable channel is automatically switched. It can flexibly adapt to different test requirements, supporting both manual testing to improve operational flexibility and automatic testing to improve test efficiency and accuracy.

[0037] In a preferred embodiment, the button input unit 22 includes a jog button SB2, resistors R35, R36, and R37, and an optocoupler U10. One end of the jog button SB2 is electrically connected to resistors R35 and R36, and the other end of the jog button SB2 is electrically connected to the power supply terminal. The other end of resistor R35 is electrically connected to the positive input terminal of optocoupler U10. The positive output terminal of optocoupler U10 is electrically connected to the power supply terminal. The negative output terminal of optocoupler U10 serves as the output terminal of button input unit 22 and is electrically connected to one end of resistor R37. The other end of resistor R36 is grounded together with the negative input terminal of optocoupler U10 and the other end of resistor R37.

[0038] It should be noted that when the jog button SB2 is pressed, its contacts close, allowing current to flow from the power supply terminal through resistors R35 and R36 into the input LED of the optocoupler U10. After the LED emits light, it excites the phototransistor to conduct, thereby generating an electrical signal corresponding to the input signal at the output of the optocoupler U10. This electrical signal is at a low level and is transmitted to the logic control unit 24 through resistor R37 as a signal to trigger the test process.

[0039] In a preferred embodiment, the timing pulse unit 23 in this embodiment includes a time base chip U1, a resistor R33, a capacitor C2, a capacitor C1, and an adjustment resistor RP1. Pin 7 of the time base chip U1 is electrically connected to one end of the resistor R33 and the adjustment resistor RP1, respectively. The other end of the adjustment resistor RP1 is electrically connected to pin 8, pin 4 of the time base chip U1, and the power supply terminal, respectively. The other end of the resistor R33 is electrically connected to pin 2, pin 6 of the time base chip U1, and the capacitor C2, respectively. Pin 5 of the time base chip U1 is electrically connected to the capacitor C1. The other end of the capacitor C2 is grounded along with pin 1 of the time base chip U1 and the other end of the capacitor C1. Pin 3 of the time base chip U1 serves as the output terminal of the timing pulse unit 23.

[0040] It should be noted that the timer chip U1 is model NE555. When the power supply is on, the timer chip U1 starts to work. According to the voltage levels of pins 2 and 6, and the charging and discharging process of capacitor C2, pin 3 of the timer chip U1 will output a stable timing pulse signal. The frequency and duty cycle of this signal can be changed by adjusting the values ​​of resistor R33, capacitor C2 and adjusting resistor RP1.

[0041] In a preferred embodiment, the logic control unit 24 includes counter U2, counter U3, inverter U11A, capacitor C3, resistor R34, OR gate U4A, AND gate U5A, decoder U6, decoder U7, decoder U8, decoder U9, and reset button SB1.

[0042] Pin 1 of counter U2 is electrically connected to resistor R34, capacitor C3, reset button SB1, and pin 1 of counter U3, respectively. Pin 2 of counter U2 serves as the input terminal of logic control unit 24. Pins 3, 4, 5, and 6 of counter U2 are grounded. Pin 7 of counter U2 is electrically connected to pins 9 and 10 of counter U2, the other end of resistor R34, pins 7, 9, and 10 of counter U3, and the power supply terminal, respectively. Pin 15 of counter U2 is electrically connected to the input terminal of inverter U11A. The output of inverter U11A is electrically connected to pin 2 of counter U3. The ground terminal of inverter U11A is connected to the other end of capacitor C3, the other end of reset button SB1, and pins 3, 4, 5, and 6 of counter U3 for common ground. Pin 14 of counter U2 is electrically connected to pin 1 of decoders U6, U7, U8, and U9. Pin 13 of counter U2 is electrically connected to pin 2 of decoders U6, U7, U8, and U9. Pin 12 of counter U2 is... Do not electrically connect pin 3 of decoders U6, U7, U8, and U9. Pin 11 of counter U2 is electrically connected to the non-inverting input of OR gate U4A, the non-inverting input of AND gate U5A, pin 6 of decoder U7, and pins 5 and 4 of decoder U8, respectively. The output of OR gate U4A is electrically connected to pins 5 and 4 of decoder U6. The inverting input of OR gate U4A is electrically connected to the inverting input of AND gate U5A, pin 14 of counter U3, pin 6 of decoder U8, and pins 5 and 4 of decoder U7, respectively. Electrical connections: The output of AND gate U5A is electrically connected to pin 6 of decoder U9. The power supply terminals of counters U2, U3, OR gate U4A, AND gate U5A, decoders U6, U7, U8, and U9 are connected to the common power input terminal. The ground terminals of counters U2, U3, OR gate U4A, AND gate U5A, decoders U6, U7, U8, and U9 are grounded together. The output terminals of decoders U6, U7, U8, and U9 serve as the test interface for logic control module 2.

[0043] It should be noted that pin 1 of counters U2 and U3 is used to receive reset signals. When the reset button SB1 is pressed, a low-level signal is sent to pin 1 of the two counters through the debouncing circuit composed of resistor R34 and capacitor C3, so that the counters are reset to the initial state 0.

[0044] Specifically, the counter is model 74LS161 and the decoder is model 74LS138.

[0045] The working principle is as follows:

[0046] A clock signal is applied to the clock terminal of the counter. The counter increments whenever the clock signal has a rising edge. The Q0 to Q3 outputs of counters U2 and U3 are connected to the input terminals of multiple decoders. As the count increases, the output terminals Y0 to Y7 of the decoders are activated sequentially. Each activated output terminal represents a specific cable test interface. The activated decoder output terminals Y1-Y7 are connected to the corresponding wires of the cable, which sequentially controls the switching of test interfaces to test each channel. When the low level output of the decoder terminal is connected to the indicator module 3 through the corresponding cable wire, the light-emitting part 31 of the indicator module 3 lights up, indicating that the wire is in a connected state.

[0047] The cable interface module 1 in this embodiment includes a common port 11 and several connection ports 12. Both the common port 11 and the several connection ports 12 have several connection terminals. The two ends of each connection terminal of the common port 11 are electrically connected to the test interface of the logic control module 2 and one end of each wire of the cable under test, respectively. The two ends of each connection terminal of the several connection ports 12 are electrically connected to the other end of each wire of the cable under test and one end of the indicator module 3, respectively. The number of connection terminals of the common port 11 is equal to the sum of the number of connection terminals of the several connection ports 12, and the connection terminals of the common port 11 and the connection terminals of the connection ports 12 are arranged in a one-to-one correspondence.

[0048] It should be noted that in this embodiment, there are four connection ports 12, namely CT2, CT3, CT4 and CT5. CT2 has two connection terminals, which correspond to Y1 and Y2 of the common port 11 respectively. CT3 has five connection terminals, which correspond to Y3, Y4, Y5, Y6 and Y7 of the common port 11 respectively. CT4 has five connection terminals, which correspond to Y8, Y9, Y10, Y11 and Y12 of the common port 11 respectively. CT5 has three connection terminals, which correspond to Y13, Y14 and Y15 of the common port 11 respectively.

[0049] In this embodiment, the light-emitting part 31 of the indicator module 3 is a light-emitting diode. The negative terminal of the light-emitting diode is electrically connected to the connection terminal of the connection port 12, and the positive terminal of the light-emitting diode is connected to the power supply terminal.

[0050] This embodiment also includes a voltage regulator module 4. The input terminal of the voltage regulator module 4 is electrically connected to an external DC power supply, and the output terminal of the voltage regulator module 4 serves as a power supply terminal, which is electrically connected to the indicator module 3 and the logic control module 2 respectively.

[0051] The voltage regulator module includes a voltage regulator chip U12, capacitor C14, polarized capacitor C13, polarized capacitor C15, capacitor C16, and diode D7. The input terminal of the voltage regulator chip U12 is electrically connected to the negative terminal of diode D7, the external power supply, and the positive terminals of capacitors C14 and C13. The output terminal of the voltage regulator chip U12 is electrically connected to the positive terminal of diode D7, the power supply terminal, the positive terminal of polarized capacitor C15, and one end of capacitor C16. The negative terminal of polarized capacitor C13, the other end of capacitor C14, and the other ends of polarized capacitors C15 and C16 are electrically connected and grounded together.

[0052] It should be noted that voltage regulator module 4 converts +28V voltage to +5V voltage to power each unit.

[0053] This embodiment also includes a power switch S1, a fuse, a diode D1, and a power indicator light. The positive terminal of the power supply is electrically connected to one end of the power switch S1, and the other end of the power switch S1 is electrically connected to the fuse. The other end of the fuse is electrically connected to the negative terminal of the diode D1, the power indicator light, and the power supply terminal of the logic control module 2. The negative terminal of the power supply is electrically connected to the positive terminal of the diode D1, the other end of the power indicator light, and the ground terminal of the logic control module 2.

[0054] During testing, close the power switch S1 to supply power to the main board of logic control module 2 with +28V power. When the power indicator light comes on, the external DC power supply is normal.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cable continuity detection device, characterized in that, It includes a cable interface module (1), a logic control module (2), and an indicator module (3), wherein, One end of the cable under test is electrically connected to the input terminal of the cable interface module (1), and the other end is electrically connected to the logic control module (2); the logic control module (2) has several test interfaces; One end of the indicator module (3) is electrically connected to the output end of the cable interface module (1), and the other end is electrically connected to the power supply end. The indicator module (3) has several light-emitting parts (31). The number of light-emitting parts (31) is the same as that of the test interface and the wires of the cable under test and they are set accordingly. The logic control module (2) is used to switch the test interface in sequence and control the corresponding light-emitting parts (31) to turn on and off, so as to indicate the continuity of the corresponding wires of the cable under test.

2. The cable continuity detection device as described in claim 1, characterized in that: The logic control module (2) includes a mode switching switch (21), a button input unit (22), a timing pulse unit (23), and a logic control unit (24), wherein, The mode switching switch (21) has two input terminals and one output terminal; the output terminals of the button input unit (22) and the timing pulse unit (23) are electrically connected to the corresponding input terminals of the mode switching switch (21); the output terminal of the mode switching switch (21) is electrically connected to the input terminal of the logic control unit (24), and the mode switching switch (21) is used to switch the signal input mode of the logic control unit (24).

3. The cable continuity detection device as described in claim 2, characterized in that: The button input unit (22) includes a jog button SB2, resistors R35, R36, and R37, and an optocoupler U10. One end of the jog button SB2 is electrically connected to resistors R35 and R36, and the other end of the jog button SB2 is electrically connected to the power supply terminal. The other end of resistor R35 is electrically connected to the positive input terminal of optocoupler U10. The positive output terminal of optocoupler U10 is electrically connected to the power supply terminal. The negative output terminal of optocoupler U10 serves as the output terminal of the button input unit (22) and is electrically connected to one end of resistor R37. The other end of resistor R36 is grounded together with the negative input terminal of optocoupler U10 and the other end of resistor R37.

4. The cable continuity detection device as described in claim 2, characterized in that: The timing pulse unit (23) includes a time base chip U1, a resistor R33, a capacitor C2, a capacitor C1, and an adjustment resistor RP1. The pin 7 of the time base chip U1 is electrically connected to one end of the resistor R33 and the adjustment resistor RP1, respectively. The other end of the adjustment resistor RP1 is electrically connected to the pin 8, the pin 4 of the time base chip U1, and the power supply terminal, respectively. The other end of the resistor R33 is electrically connected to the pin 2, the pin 6 of the time base chip U1, and the capacitor C2, respectively. The pin 5 of the time base chip U1 is electrically connected to the capacitor C1. The other end of the capacitor C2 is grounded together with the pin 1 of the time base chip U1 and the other end of the capacitor C1. The pin 3 of the time base chip U1 serves as the output terminal of the timing pulse unit (23).

5. The cable continuity detection device as described in claim 2, characterized in that: The logic control unit (24) includes counter U2, counter U3, inverter U11A, capacitor C3, resistor R34, OR gate U4A, AND gate U5A, decoder U6, decoder U7, decoder U8, decoder U9, and reset button SB1, wherein, Pin 1 of counter U2 is electrically connected to resistor R34, capacitor C3, reset button SB1, and pin 1 of counter U3, respectively. Pin 2 of counter U2 serves as the input terminal of the logic control unit (24). Pins 3, 4, 5, and 6 of counter U2 are grounded. Pin 7 of counter U2 is electrically connected to pins 9 and 10 of counter U2, the other end of resistor R34, pins 7, 9, and 10 of counter U3, and the power supply terminal, respectively. Pin 15 of counter U2 is electrically connected to the input terminal of inverter U11A. The output of inverter U11A is electrically connected to pin 2 of counter U3. The ground terminal of inverter U11A is connected to the other end of capacitor C3, the other end of reset button SB1, and pins 3, 4, 5, and 6 of counter U3 for common ground. Pin 14 of counter U2 is electrically connected to pin 1 of decoders U6, U7, U8, and U9. Pin 13 of counter U2 is electrically connected to pin 2 of decoders U6, U7, U8, and U9. Pin 12 of counter U2 is... Do not electrically connect pin 3 of decoders U6, U7, U8, and U9. Pin 11 of counter U2 is electrically connected to the non-inverting input of OR gate U4A, the non-inverting input of AND gate U5A, pin 6 of decoder U7, and pins 5 and 4 of decoder U8, respectively. The output of OR gate U4A is electrically connected to pins 5 and 4 of decoder U6. The inverting input of OR gate U4A is electrically connected to the inverting input of AND gate U5A, pin 14 of counter U3, pin 6 of decoder U8, and pins 5 and 4 of decoder U7, respectively. The output of AND gate U5A is electrically connected to pin 6 of decoder U9. The power supply terminals of counters U2, U3, OR gate U4A, AND gate U5A, decoder U6, decoder U7, decoder U8 and decoder U9 are connected to the power input terminal. The ground terminals of counters U2, U3, OR gate U4A, AND gate U5A, decoder U6, decoder U7, decoder U8 and decoder U9 are grounded. The output terminals of decoders U6, U7, U8 and decoder U9 serve as the test interface of logic control module (2).

6. The cable continuity detection device as described in claim 1, characterized in that: The cable interface module (1) includes a common port (11) and several connection ports (12). The common port (11) and several connection ports (12) each have several connection terminals. The two ends of each connection terminal of the common port (11) are electrically connected to the test interface of the logic control module (2) and one end of each wire of the cable under test, respectively. The two ends of each connection terminal of the several connection ports (12) are electrically connected to the other end of each wire of the cable under test and one end of the indicator module (3), respectively.

7. The cable continuity detection device as described in claim 6, characterized in that: The connection terminals of the common port (11) are equal to the sum of the connection terminals of several connection ports (12), and the connection terminals of the common port (11) and the connection terminals of the connection ports (12) are arranged in a one-to-one correspondence.

8. The cable continuity detection device as described in claim 7, characterized in that: The light-emitting part (31) of the indicator module (3) is a light-emitting diode. The negative terminal of the light-emitting diode is electrically connected to the connection terminal of the connection port (12), and the positive terminal of the light-emitting diode is connected to the power supply terminal.

9. The cable continuity detection device as described in claim 1, characterized in that: It also includes a voltage regulator module (4), the input terminal of which is electrically connected to an external DC power supply, and the output terminal of which serves as a power supply terminal and is electrically connected to the indicator module (3) and the logic control module (2) respectively.

10. The cable continuity detection device as described in claim 9, characterized in that: The voltage regulator module (4) includes a voltage regulator chip U12, a capacitor C14, a polarized capacitor C13, a polarized capacitor C15, a capacitor C16, and a diode D7. The input terminal of the voltage regulator chip U12 is electrically connected to the negative terminal of the diode D7, the external power supply, the positive terminal of the capacitor C14, and the positive terminal of the polarized capacitor C13. The output terminal of the voltage regulator chip U12 is electrically connected to the positive terminal of the diode D7, the power supply terminal, the positive terminal of the polarized capacitor C15, and one end of the capacitor C16. The negative terminal of the polarized capacitor C13, the other end of the capacitor C14, and the other ends of the polarized capacitors C15 and C16 are electrically connected and grounded together.

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