CN218647138U - Marine cable core continuity detection device - Google Patents

Marine cable core continuity detection device Download PDF

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Publication number
CN218647138U
CN218647138U CN202222423633.6U CN202222423633U CN218647138U CN 218647138 U CN218647138 U CN 218647138U CN 202222423633 U CN202222423633 U CN 202222423633U CN 218647138 U CN218647138 U CN 218647138U
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module
timer
input
resistor
pulse distributor
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章业成
翟昌宇
徐俊杰
孙鹏程
李嘉文
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Shanghai Shipbuilding Electronic Equipment Research Institute 726 Research Institute Of China Shipbuilding Corp
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Shanghai Shipbuilding Electronic Equipment Research Institute 726 Research Institute Of China Shipbuilding Corp
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Abstract

The utility model provides a marine cable core continuity detection device, the output of power module connects the input of test module, one end of the cable to be tested connects the output of test module through the first matching plug, the other end of the cable to be tested connects the input of display module through the second matching plug; the test module comprises an adapter module, a timer module and a counter module; the output end of the power supply module is connected with the input end of the adapter module, and the output end of the adapter module is respectively connected with the input end of the timer module and the first input end of the counter module; the output end of the timer module is connected with the second input end of the counter module; one end of the cable to be tested is connected with the output end of the counter module through the first matching plug. The utility model discloses the realization can judge the cable conductor condition of switching on, open circuit, string way fast directly perceivedly to cable conductor continuity short-term test, increases substantially cable conductor switches on detection efficiency.

Description

Marine cable core continuity detection device
Technical Field
The utility model relates to a cable maintenance equipment technical field specifically, relates to marine cable core continuity detection device, especially marine cable core continuity quick detection device.
Background
At present, with the rapid development of weapon equipment technology, the sensor equipment includes radio frequency, audio frequency, optical frequency equipment, etc., and in order to obtain better performance index, the number of sensors is continuously increased. With the increasing number of control cable and communication cable cores of the equipment, part of the cable cores reach 100 cores or more. The two ends of the cable are provided with connector plugs which are interconnected with sockets on the equipment, so that data transmission and communication control between the equipment are realized. The interconnection between the cable and the connector generally adopts a manual welding mode, namely, according to the convention of a wiring table, electric soldering iron, soldering tin and the like are used for welding the core wires in the cable with contact pins on the connector one by one. Because the contact pins on the connector are densely arranged and the number of cable cores is large, the conditions of core wire open circuit and serial circuit are inevitable during manual welding.
The method has the advantages that the defects of low detection efficiency, complex operation, low speed, large workload, poor accuracy, high possibility of human errors and the like are exposed for the detection of various multi-core cables, the core wires of the multi-core cables are difficult to find when the core wires are in series, and the contact pins of the multi-core connector are thin, so that the aerial plug is easy to bend or even break by using the contact pins of the universal meter.
Along with the rapid development of the automatic detection technology, the automatic detection of the cable is more and more emphasized, and the problems of rapid detection of cable assembly, reduction of the workload of cable detection personnel, and improvement of the detection accuracy and the detection efficiency of the cable are urgently needed to be solved.
Patent document CN113567889A discloses a device and a method for rapidly detecting connection relation of cable cores, the device includes a controller, a display connected with the controller, a left multi-way switch, a right multi-way switch and a digital multimeter, and the left multi-way switch, the right multi-way switch and the digital multimeter are connected with a cable to be detected through a transfer cable. This patent document still suffers from the drawback that the use of a multimeter can cause damage to the connector pins.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing a marine cable core continuity detection device.
According to the utility model provides a pair of marine cable heart yearn continuity detection device, include: the device comprises a power supply module, a test module and a display module;
the output end of the power supply module is connected with the input end of the testing module, one end of a cable to be tested is connected with the output end of the testing module through a first matching plug, and the other end of the cable to be tested is connected with the input end of the display module through a second matching plug;
the test module comprises an adapter module, a timer module and a counter module; the output end of the power supply module is connected with the input end of the adapter module, and the output end of the adapter module is respectively connected with the input end of the timer module and the first input end of the counter module; the output end of the timer module is connected with the second input end of the counter module; one end of the cable to be tested is connected with the output end of the counter module through a first matching plug.
Preferably, the timer module comprises a timer chip, a fixed resistor R1, a fixed resistor R2, a fixed resistor R3, a fixed resistor R4, an electrolytic capacitor C3 and an electrolytic capacitor C4;
the timing chip is an NE555N timer chip, the constant resistor R1 is a constant resistor of 2k omega, the constant resistor R2 is a constant resistor of 1k omega, the constant resistor R3 is a constant resistor of 120k omega, the constant resistor R4 is a constant resistor of 2k omega, the electrolytic capacitor C3 is an electrolytic capacitor of 4.7uF, and the electrolytic capacitor C4 is an electrolytic capacitor of 4.7 uF;
one end of the constant value resistor R2 is respectively connected with the adapter module, the counter module, one end of the constant value resistor R1, the RST pin of the timer chip and the VCC pin of the timer chip; the other end of the constant value resistor R2 is respectively connected with the adapter module, the counter module, the cathode of the electrolytic capacitor C3, the cathode of the electrolytic capacitor C4, a GND pin of the timer chip and one end of the constant value resistor R4;
the other end of the fixed resistor R1 is respectively connected with a DISC pin of the timer chip and one end of the fixed resistor R3; the other end of the constant value resistor R3 is respectively connected with the THR pin of the timer chip, the TRIG pin of the timer chip and the anode of the electrolytic capacitor C3;
the other end of the constant value resistor R4 is connected with an OUT pin of the timer chip;
and the anode of the electrolytic capacitor C4 is connected with a CVOLT pin of the timer chip.
Preferably, the counter module includes a first pulse distributor module, a second pulse distributor module and a nand gate circuit module;
the output end of the timer module is respectively connected with the input end of the first pulse distributor module and the input end of the NAND gate circuit module;
the output end of the first pulse distributor module is connected with the first input end of the second pulse distributor module, and the output end of the NAND gate circuit module is connected with the second input end of the second pulse distributor module;
one end of the cable to be tested is connected with the output end of the second pulse distributor module through the first matching plug.
Preferably, the first pulse distributor module adopts a single pulse distributor I;
the second pulse distributor module comprises fifteen pulse distributors II which are connected in series, and the pulse distributors I and the fifteen pulse distributors II are connected in series;
the NOT gate circuit module comprises four 2-input NAND gate cmos chips;
the output end of the timer module is respectively connected with the input end of a pulse distributor I and the input ends of the four 2-input NAND gate cmos chips, and the output ends of the four 2-input NAND gate cmos chips are respectively connected with a pulse distributor II.
Preferably, the pulse distributor I and the pulse distributor II both adopt a pulse distributor with the model number of CD 4017.
Preferably, the model of the four 2-input nand gate cmos chip is CD4011.
Preferably, the adapter module is a HW-100400C01 power adapter.
Preferably, the display module comprises a plurality of light emitting diode circuits;
the plurality of light emitting diode circuits comprise light emitting diodes and constant value resistors, and the cathodes of the light emitting diodes are connected with one ends of the constant value resistors; the positive electrode of the light emitting diode is connected with the second matching plug, and the other end of the constant value resistor is grounded.
Preferably, the resistance value of the fixed resistor is 1k Ω.
Preferably, the device also comprises a loudspeaker and a power switch;
two ends of the power switch are respectively connected with the power module and the test module; one end of the loudspeaker is connected with the display module, and the other end of the loudspeaker is grounded.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses realize the quick detection to cable conductor conductivity, can judge cable conductor conduction, open circuit, the string way condition fast directly perceivedly, increase substantially cable conductor conduction detection efficiency;
2. the utility model can reduce the intensity of manual channel-by-channel individual detection operation, and avoid the damage of the universal meter to the connector contact pin;
3. the utility model has the advantages of small volume, convenient carrying, strong universality and the like, and is convenient to use in the scenes of limited operation space of the naval vessels and the like;
4. the utility model designs the rapid detection of the conductivity of the cable core wire, has the rapid detection capability of the marine multi-core cable, and avoids the test error caused by manual negligence;
5. the utility model discloses liberation manpower resources has practiced thrift test time, improves detection efficiency greatly;
6. the utility model avoids the damage of the universal meter to the connector contact pin;
7. the utility model discloses have better commonality, also can popularize and be applied to the quick detection of large-scale equipment cable grafting state such as aircraft, communication.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a detection schematic diagram of the marine cable core conductivity detection device of the present invention;
fig. 2 is an overall structural diagram of the marine cable core conductivity detection device of the present invention;
FIG. 3 is an internal schematic view of portion A of FIG. 2;
fig. 4 is a schematic circuit diagram of the timer module of the present invention;
fig. 5 is a peripheral pin definition and a schematic circuit diagram of the nand gate circuit module of the present invention;
FIG. 6 is a schematic diagram of a cascade of four sets of NOT gate circuit blocks;
fig. 7 is a schematic diagram of the peripheral pin definition and circuit of the pulse distributor module according to the present invention;
fig. 8 is a schematic circuit diagram of the display module of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
Example 1:
as shown in fig. 1 to 8, the present embodiment provides a marine cable core conductivity detection device, including: the power module, test module and display module, the input of test module is connected to power module's output, the output of test module is connected through first matching plug to the one end of awaiting measuring cable, the other end of awaiting measuring cable passes through the input of second matching plug connection display module, test module includes the adapter module, timer module and counter module, the input of adapter module is connected to power module's output, the input of timer module and the first input of counter module are connected respectively to the output of adapter module, the second input of counter module is connected to the output of timer module, the output of awaiting measuring cable is through the output of first matching plug connection counter module. The adapter module is a HW-100400C01 power adapter.
The display module comprises a plurality of light emitting diode circuits, each light emitting diode circuit comprises a light emitting diode and a fixed value resistor, the negative electrode of each light emitting diode is connected with one end of the fixed value resistor, the positive electrode of each light emitting diode is connected with the second matching plug, and the other end of the fixed value resistor is grounded. The resistance of the fixed resistor is 1k omega.
The counter module comprises a first pulse distributor module, a second pulse distributor module and a NAND gate circuit module, the output end of the timer module is respectively connected with the input end of the first pulse distributor module and the input end of the NAND gate circuit module, the output end of the first pulse distributor module is connected with the first input end of the second pulse distributor module, the output end of the NAND gate circuit module is connected with the second input end of the second pulse distributor module, and one end of a cable to be tested is connected with the output end of the second pulse distributor module through a first matching plug.
The first pulse distributor module adopts a single pulse distributor I, the second pulse distributor module comprises fifteen pulse distributor II connected in series, the pulse distributor I is connected with the fifteen pulse distributor II in series, the NOT gate circuit module comprises four 2-input NAND gate cmos chips, the output end of the timer module is respectively connected with the input end of the pulse distributor I and the input end of the four 2-input NAND gate cmos chips, and the output ends of the four 2-input NAND gate cmos chips are respectively connected with the pulse distributor II. The first pulse distributor and the second pulse distributor both adopt the pulse distributor with the model number of CD4017, and the model number of a four 2-input NAND gate cmos chip is CD4011.
And two ends of the power switch are respectively connected with the power module and the testing module and used for switching on and switching off the power supply of the cable core wire continuity testing device. One end of the loudspeaker is connected with the display module, and the other end of the loudspeaker is grounded and is used for being matched with the light-emitting diode to check the conductivity of the cable core wire.
The timer chip, definite value resistance R1, definite value resistance R2, definite value resistance R3, definite value resistance R4, electrolytic capacitor C3 and electrolytic capacitor C4, the timer chip is NE555N timer chip, definite value resistance R1 is 2k omega definite value resistance, definite value resistance R2 is 1k omega definite value resistance, definite value resistance R3 is 120k omega definite value resistance, definite value resistance R4 is 2k omega definite value resistance, electrolytic capacitor C3 is 4.7uF electrolytic capacitor, electrolytic capacitor C4 is 4.7uF electrolytic capacitor. One end of the fixed value resistor R2 is respectively connected with the adapter module, the counter module, one end of the fixed value resistor R1, the RST pin of the timer chip and the VCC pin of the timer chip; the other end of the fixed value resistor R2 is respectively connected with the adapter module, the counter module, the cathode of the electrolytic capacitor C3, the cathode of the electrolytic capacitor C4, the GND pin of the timer chip and one end of the fixed value resistor R4, and the other end of the fixed value resistor R1 is respectively connected with the DISC pin of the timer chip and one end of the fixed value resistor R3; the other end of the constant value resistor R3 is connected with a THR pin of the timer chip, a TRIG pin of the timer chip and the anode of the electrolytic capacitor C3 respectively, the other end of the constant value resistor R4 is connected with an OUT pin of the timer chip, and the anode of the electrolytic capacitor C4 is connected with a CVOLT pin of the timer chip.
Example 2:
this embodiment will be understood by those skilled in the art as a more specific description of embodiment 1.
The embodiment provides a quick detection device for conductivity of a cable core for a ship, which can support quick detection of the conductivity of the cable core of 128 channels at most.
When the device uses, power adapter connects at the power supply port, and the cable both ends that await measuring are connected respectively at device input and output end, through emitting diode or speaker response condition, realize the cable core continuity short-term test, can judge cable core continuity, open circuit, the string way condition fast directly perceivedly, increase substantially cable core continuity detection efficiency, reduce the manual work and pursue the passageway and detect the operation intensity alone. Meanwhile, the device has the advantages of small size, convenience in carrying, high universality and the like, and is convenient to use in the situations of limited operation space of a naval vessel and the like.
The automatic detection device for conductivity of the core wire of the marine cable comprises a power adapter module, a timer, a pulse distributor, a NAND gate circuit, a light-emitting diode, a loudspeaker, a detection joint, a power switch and the like.
The device of the embodiment mainly comprises a test module and a display module. The AC220V or DC5V directly supplies power to the test module, under the condition that the external power supply condition is not allowed, the power can be directly supplied through the charger and the USB line, the test module regularly supplies power to 1-128 paths of core wires in sequence, and the conduction of the cable core wires is quickly detected through the response condition of the light-emitting diode or the loudspeaker.
The input end of the testing module is connected with the power input, the output end of the testing module is connected with one end of a cable to be tested through a matching plug, and the other end of the cable to be tested is connected with the display module through the matching plug.
The test module includes:
the 5V power input adapter module is used for converting an AC220V power supply into 5V direct-current voltage and supplying power to each component;
the timer module is also called a time base integrated circuit and is used for generating a high level signal at fixed time to serve as a switching signal of the back-end circuit;
and the counter circuit module sequentially provides corresponding level signals for 1-128 paths of core lines through 16 pulse distributors (CD 4017) and 4 four 2-input NAND gate cmos chips (CD 4011).
The working principle is as follows:
the power supply is connected, the two ends of the cable are respectively connected with the test module and the display module through the matching plugs, the switch is pressed, the device starts to operate, and whether the core wires are conducted, broken and connected in series or not is judged quickly and visually by observing the on and off of the light emitting diodes of the display module. If a certain street lamp is not lighted, the cable core wire is broken, and if two or more paths are simultaneously lighted, a series circuit exists.
Example 3:
those skilled in the art will understand this embodiment as a more specific description of embodiment 1.
The aim at of this embodiment overcomes the problem that current detection means can not better quick detection break-make and series circuit, and this embodiment provides a simple structure, convenient to use, quick, safe detection device, and the device only needs the staff to await measuring the cable access this device when the operation, presses the switch, only need observe emitting diode bright go out can.
In order to achieve the above purpose, the following technical solutions are adopted in this embodiment: a marine cable core continuity quick detection device includes:
the input end of the test module is connected with the power input, the output end of the test module is connected with one end (end A) of a cable to be tested through a matching plug, and the other end (end B) of the cable to be tested is connected with the display module through the matching plug.
The test module includes:
the 5V power input adapter module is used for converting an AC220V power supply into 5V direct-current voltage and supplying power to various component parts such as the test module, the display module and the like;
the timer module is also called a time base integrated circuit and is used for generating a high level signal at fixed time to serve as a switching signal of the back-end circuit;
and the counter circuit sequentially supplies power to 1-128 paths of core lines through 16 pulse distributors (CD 4017) and 4 four 2-input NAND gate cmos chips (CD 4011).
And the display module consists of 128 paths of light emitting diodes and a load.
As shown in fig. 1 to 8, a universal detection device for rapidly detecting the serial connection and the on-off of a cable core consists of a test module and a display module, wherein the test module comprises a timer module and a counter module.
As shown in fig. 1 to 4, the device for rapidly detecting the conductivity of the core wire of the marine cable specifically comprises the following steps: the power supply is connected, two ends of a cable AB are respectively connected to a test module and a display module through matching plugs, a switch is pressed down, the device starts to operate, an NE555N timer outputs a rising edge signal at regular time, a CD4017A starts to count the rising edge signal, firstly, a CD4017A 3 rd pin outputs a trigger signal to be connected to a CD4017B 15 th pin, the CD4017B resets and prepares for work, then 8 paths of outputs are sequentially generated, the output is transmitted to the display module through a cable to be tested, after a 11 th pin outputs a high level signal, a 13 th pin is pulled up and is transmitted to a CD4011 1 st pin (A1) and a CD4011 2 nd pin (B1) and a CD4011 3 rd pin (Y1) generates a new clock signal to a CD4017B 14 th pin, the CD4017A keeps at the moment, the CD4017B starts to work, the principle is the same as above, and the output of the CD4017P 128 th pin is completed. Whether the core wires are conducted or disconnected or not and whether the core wires are connected or disconnected or not are judged quickly and visually by observing the on-off of the light emitting diodes of the display module. If a certain street lamp is not lighted, the cable core wire is broken, and if two or more street lamps are simultaneously lighted, a series circuit exists. The debugging personnel can adjust the core wire welding according to the corresponding result.
As shown in fig. 3, the NE555N timer outputs a rising edge signal at regular time, the CD4017A starts to count the rising edge signal, firstly, the CD4017A outputs a trigger signal at pin 3 to be connected to pin 15 of the CD4017B, the CD4017B resets and prepares to work, then 8 paths of outputs are sequentially generated, the signal passes through a cable to be tested to the display module, after the pin 11 outputs a high level signal, the pin 13 is pulled up and is sent to pin 1 (A1) of the CD4011 and pin 2 (B1) of the CD4011 to be nand, the pin 3 (Y1) of the CD4011 generates a new clock signal to pin 14 of the CD4017B, at this time, the CD4017A keeps, the CD4017B starts to work, and the principle is the same as above until the output of the pin 128 of the CD4017P is completed. The CD4017A outputs a rising edge signal by an NE555N timer, and CD4017B-CD4017E, CD4017F-CD4017I, CD4017J-CD4017M and CD4017N-CD4017P output new rising edge signals by four CDs 4011 respectively, and the principle is the same as that described above. Each CD4017 has 8 outputs, 128 being directly connected to the first mating plug.
Compared with the prior art, the device of this embodiment, simple structure, the emergence mode is novel, can be under the circumstances that guarantees that heart yearn and heart yearn terminal are not destroyed, convenient quick detection cable heart yearn is expert, disconnected, cluster to the marine AC220V of accessible or the precious direct power supply that charges daily.
The utility model discloses the realization can judge cable conductor switch on, open circuit, the string way condition to cable conductor continuity short-term test fast directly perceivedly fast, increases substantially cable conductor switches on detection efficiency.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the present application.
The foregoing descriptions have been directed to embodiments of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. The utility model provides a marine cable core continuity detection device which characterized in that includes: the device comprises a power supply module, a test module and a display module;
the output end of the power supply module is connected with the input end of the testing module, one end of a cable to be tested is connected with the output end of the testing module through a first matching plug, and the other end of the cable to be tested is connected with the input end of the display module through a second matching plug;
the test module comprises an adapter module, a timer module and a counter module; the output end of the power supply module is connected with the input end of the adapter module, and the output end of the adapter module is respectively connected with the input end of the timer module and the first input end of the counter module; the output end of the timer module is connected with the second input end of the counter module; one end of the cable to be tested is connected with the output end of the counter module through a first matching plug.
2. The marine cable core continuity testing device according to claim 1, wherein the timer module includes a timer chip, a fixed resistor R1, a fixed resistor R2, a fixed resistor R3, a fixed resistor R4, an electrolytic capacitor C3, and an electrolytic capacitor C4;
the timer chip is an NE555N timer chip, the fixed resistor R1 is a 2k omega fixed resistor, the fixed resistor R2 is a 1k omega fixed resistor, the fixed resistor R3 is a 120k omega fixed resistor, the fixed resistor R4 is a 2k omega fixed resistor, the electrolytic capacitor C3 is a 4.7uF electrolytic capacitor, and the electrolytic capacitor C4 is a 4.7uF electrolytic capacitor;
one end of the constant value resistor R2 is respectively connected with the adapter module, the counter module, one end of the constant value resistor R1, the RST pin of the timer chip and the VCC pin of the timer chip; the other end of the fixed resistor R2 is respectively connected with the adapter module, the counter module, the cathode of the electrolytic capacitor C3, the cathode of the electrolytic capacitor C4, the GND pin of the timer chip and one end of the fixed resistor R4;
the other end of the fixed value resistor R1 is respectively connected with a DISC pin of the timer chip and one end of the fixed value resistor R3; the other end of the constant value resistor R3 is respectively connected with the THR pin of the timer chip, the TRIG pin of the timer chip and the anode of the electrolytic capacitor C3;
the other end of the constant value resistor R4 is connected with an OUT pin of the timer chip;
and the anode of the electrolytic capacitor C4 is connected with a CVOLT pin of the timer chip.
3. The marine cable core continuity testing device according to claim 1, wherein the counter module comprises a first pulse distributor module, a second pulse distributor module and a nand gate circuit module;
the output end of the timer module is respectively connected with the input end of the first pulse distributor module and the input end of the NAND gate circuit module;
the output end of the first pulse distributor module is connected with the first input end of the second pulse distributor module, and the output end of the NAND gate circuit module is connected with the second input end of the second pulse distributor module;
one end of the cable to be tested is connected with the output end of the second pulse distributor module through the first matching plug.
4. The marine cable core continuity testing arrangement according to claim 3, wherein the first pulse divider module employs a single pulse divider one;
the second pulse distributor module comprises fifteen pulse distributors II which are connected in series, and the pulse distributors I and the fifteen pulse distributors II are connected in series;
the NOT gate circuit module comprises four 2-input NAND gate cmos chips;
the output end of the timer module is respectively connected with the input end of a pulse distributor I and the input ends of the four 2-input NAND gate cmos chips, and the output ends of the four 2-input NAND gate cmos chips are all connected with a pulse distributor II.
5. The marine cable core conductivity detection device of claim 4, wherein the pulse distributor I and the pulse distributor II are both pulse distributors with the type of CD 4017.
6. The marine cable core conductivity detection device of claim 4, wherein the model number of the four 2-input nand gate cmos chip is CD4011.
7. The marine cable core continuity testing arrangement of claim 1, wherein the adapter module is a HW-100400C01 power adapter.
8. The marine cable core continuity testing arrangement according to claim 1, wherein the display module includes a plurality of light emitting diode circuits;
the plurality of light emitting diode circuits comprise light emitting diodes and constant value resistors, and the cathodes of the light emitting diodes are connected with one ends of the constant value resistors; the positive electrode of the light emitting diode is connected with the second matching plug, and the other end of the constant value resistor is grounded.
9. The marine cable core continuity testing device according to claim 8, wherein the resistance value of the fixed resistor is 1k Ω.
10. The marine cable core conductivity detection device according to claim 1, further comprising a speaker and a power switch;
two ends of the power switch are respectively connected with the power module and the test module; one end of the loudspeaker is connected with the display module, and the other end of the loudspeaker is grounded.
CN202222423633.6U 2022-09-13 2022-09-13 Marine cable core continuity detection device Active CN218647138U (en)

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Application Number Priority Date Filing Date Title
CN202222423633.6U CN218647138U (en) 2022-09-13 2022-09-13 Marine cable core continuity detection device

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Application Number Priority Date Filing Date Title
CN202222423633.6U CN218647138U (en) 2022-09-13 2022-09-13 Marine cable core continuity detection device

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CN218647138U true CN218647138U (en) 2023-03-17

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CN202222423633.6U Active CN218647138U (en) 2022-09-13 2022-09-13 Marine cable core continuity detection device

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