CN219831345U - Cable automatic detection circuit and cable automatic detection device - Google Patents

Abstract

The present disclosure provides a cable automatic detection circuit and a cable automatic detection device. The cable automatic detection circuit includes: a first branch including a first power source, a first indicator, and a first switch connected in series with each other; a first switching circuit connected in parallel with the first branch and including a first node, a second node, and a third node at different positions; and the second switch circuit is connected with the first switch circuit in parallel, wherein the first node is used for being electrically connected with a first wire in the cable, the second node is used for being electrically connected with a second wire in the cable, and the third node is used for being electrically connected with a third wire in the cable. The automatic cable detection circuit disclosed by the utility model can detect whether a cable is normal or not.

Description

Cable automatic detection circuit and cable automatic detection device

Technical Field

The present disclosure relates generally to the field of cables, and more particularly, to an automatic cable detection circuit and an automatic cable detection device.

Background

After a wind generating set (also can be simply called a set, a fan or a wind generating set) causes a communication fault due to a line (including a cable), whether a communication cable is broken or not can be often only measured, but the specific broken line position is not easy to distinguish. The communication cable may also be interrupted at the slip ring or the communication plug, as the communication cable passes through the slip ring and the communication plug. In addition, the cable is complex, and the cable is fixed by using the binding belts at a plurality of places, so that the replacement of the communication cable is very inconvenient. Therefore, the method has a critical effect on shortening fault processing time and reducing labor intensity of maintenance workers for the disconnection condition of the communication cable with complex field environment, complex wiring and longer cable, and the disconnection position of the cable is rapidly and accurately judged.

The current method for troubleshooting the DP cable comprises a multimeter measuring method, a DP analyzer measuring method and a breakpoint measuring method.

When using a multimeter to measure, the male head is not easily contacted with the stylus probe and the DB-9 pin, and the measurement is very inconvenient. In addition, because the communication cable is generally in a networking structure, and various communication modes (such as RS485, DP and CanOpen) are also involved in the unit electrical cabinet, the method for measuring only the terminal resistance of the DP plug can not detect whether the cable has a problem or has cross connection. For example, if a DP cable on one side is connected to an RS485 cable on the other side, since both communications have termination resistances, it is detected that the resistance is in a normal range, so that a person may misunderstand that the cable is normal, and a large directional disturbance is caused to troubleshooting of a communication failure.

The DP analyzer is expensive, and is suitable for online analysis of communication quality, and is not suitable for searching for faults of communication cables.

The breakpoint measurement method cannot detect the condition that the communication cable is connected in error, sometimes the communication cable penetrates into the iron pipe, the implementation is difficult, and the breakpoint measurement method is not suitable for detecting the communication cable with complex wiring.

Disclosure of Invention

It is an object of the present disclosure to provide a cable automatic detection circuit capable of detecting whether a cable is normal.

According to a first aspect of the present disclosure, a cable automatic detection circuit includes: a first branch including a first power source, a first indicator, and a first switch connected in series with each other; a first switching circuit connected in parallel with the first branch and including a first node, a second node, and a third node at different positions; and the second switch circuit is connected with the first switch circuit in parallel, wherein the first node is used for being electrically connected with a first wire in the cable, the second node is used for being electrically connected with a second wire in the cable, and the third node is used for being electrically connected with a third wire in the cable.

According to an embodiment of the present disclosure, the cable automatic detection circuit may further include: a second branch including a second power source, a second indicator, and a second switch connected in series with each other; a third switching circuit connected in parallel with the second branch and including fourth, fifth and sixth nodes at different positions; and a fourth switching circuit connected in parallel with the third switching circuit, wherein a fourth node is used for being electrically connected with the first line, a fifth node is used for being electrically connected with the second line, and a sixth node is used for being electrically connected with the third line.

According to an embodiment of the present disclosure, the cable automatic detection circuit may further include: a first plug including a first terminal connected to the first node, a second terminal connected to the second node, and a third terminal connected to the third node; and/or a second plug, including a first signal terminal connected with the fourth node, a second signal terminal connected with the fifth node, and a third signal terminal connected with the third node, wherein the first terminal, the second terminal, and the third terminal are respectively used for electrically connecting to one end of the cable, and the first signal terminal, the second signal terminal, and the third signal terminal are respectively used for electrically connecting to the other end of the cable.

According to an embodiment of the present disclosure, the cable may be a DP cable, the first node, the second node, and the third node may be respectively for electrically connecting to a first communication signal line, a second communication signal line, and a ground line of the DP cable, the first terminal, the second terminal, and the third terminal may be respectively for electrically connecting to the first communication signal line, the second communication signal line, and the ground line, and the first signal terminal, the second signal terminal, and the third signal terminal may be respectively for electrically connecting to the first communication signal line, the second communication signal line, and the ground line.

According to an embodiment of the present disclosure, the first switching circuit may include a first SPDT switch or a first SPTT switch, and/or the third switching circuit may include a second SPDT switch or a second SPTT switch, wherein the second node may be connected to a common terminal of the first SPDT switch or the first SPTT switch, the first node may be connected to a first terminal of the first SPDT switch or the first SPTT switch, the third node may be connected to a second terminal of the first SPDT switch or the first SPTT switch, the fifth node may be connected to a common terminal of the second SPDT switch or the second SPTT switch, the fourth node may be connected to a first terminal of the second SPDT switch or the second SPTT switch, and the sixth node may be connected to a second terminal of the second SPDT switch or the second SPTT switch.

According to an embodiment of the present disclosure, the first switching circuit may include a first DPDT switch, and/or the third switching circuit may include a second DPDT switch, wherein the first node may be connected to a second common terminal of the first DPDT switch, the second node may be connected to a first terminal and a fourth terminal of the first DPDT switch, the third node may be connected to the second common terminal of the first DPDT switch, the fourth node may be connected to the first common terminal of the second DPDT switch, the fifth node may be connected to the first terminal and the fourth terminal of the second DPDT switch, and the sixth node may be connected to the first common terminal of the second DPDT switch.

According to an embodiment of the present disclosure, the first switching circuit may include a first SPST switch and a second SPST switch connected in series with each other, and/or the third switching circuit may include a third SPST switch and a fourth SPST switch connected in series with each other, wherein the second node is located between a first end of the first SPST switch and a first end of the second SPST switch, the first node may be connected to a second end of the first SPST switch, the third node may be connected to a second end of the second SPST switch, the fifth node may be located between a first end of the third SPST switch and a first end of the fourth SPST switch, the fourth node may be connected to a second end of the third SPST switch, and the sixth node may be connected to a second end of the fourth SPST switch.

According to an embodiment of the present disclosure, the second switching circuit may include a fifth SPST switch, and/or the fourth switching circuit may include a sixth SPST switch, wherein a first end of the fifth SPST switch may be connected to the first node, a second end of the fifth SPST switch may be connected to the third node, a first end of the sixth SPST switch may be connected to the fourth node, and a second end of the sixth SPST switch may be connected to the sixth node.

According to an embodiment of the present disclosure, at least one of the first indicator and the second indicator may include an LED lamp or a buzzer.

According to a second aspect of the present disclosure, a cable automatic detection device includes the cable automatic detection circuit described above.

The cable detection circuit according to the embodiment of the disclosure can detect whether a cable is connected wrongly, so that the problem of inconvenient measurement by using a universal meter is avoided.

Drawings

The foregoing and other objects and features of exemplary embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate the embodiments by way of example, in which:

fig. 1 is a schematic diagram showing a cable automatic detection circuit according to a first embodiment of the present disclosure;

fig. 2 is a schematic diagram showing a cable automatic detection circuit according to a second embodiment of the present disclosure;

fig. 3 is a schematic diagram showing a cable automatic detection circuit according to a third embodiment of the present disclosure;

fig. 4 is a schematic diagram illustrating an automatic cable detection device according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram showing a cable automatic detection circuit according to a fourth embodiment of the present disclosure;

fig. 6 is a schematic diagram showing a cable automatic detection circuit according to a fifth embodiment of the present disclosure;

fig. 7 is a schematic diagram showing a cable automatic detection circuit according to a sixth embodiment of the present disclosure; and

fig. 8 is a schematic diagram showing a cable automatic detection circuit according to a seventh embodiment of the present disclosure.

Detailed Description

The following detailed description is provided to assist in obtaining a thorough understanding of the structures described herein. In addition, descriptions of the contents well known in the art will be omitted or simplified for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein.

Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs after understanding this disclosure. Unless explicitly so defined herein, terms (such as those defined in a general dictionary) should be construed to have meanings consistent with their meanings in the context of the relevant art and the present disclosure, and should not be interpreted idealized or overly formal.

Unless specifically stated otherwise, like numbers generally refer to like elements (e.g., components, steps, and methods). The reference numerals described in the previous embodiments, which are again present in the latter embodiments, may be omitted. In addition, technical features described in different or the same embodiment may be combined in any manner as long as the combined embodiment or technical solution is complete and can solve the technical problem of the present utility model or realize technical effects described or not described in the present utility model but can be determined according to the complete technical solution.

The cable automatic detection circuit can detect whether a cable is normal or not. The cable automatic detection device is provided with the indicator and the power supply, realizes the function of 4-way sharing, does not need to be provided with a plurality of indicators and the power supply, can simplify the circuit structure, and reduces the module volume.

The automatic cable detection circuit comprises two parts with completely identical circuit functions, each part can be freely matched, and each module can realize the functions of short circuit and LED indication. Preferred embodiments of the present disclosure will be described below in conjunction with fig. 1 to 8.

Fig. 1 is a schematic diagram illustrating a cable automatic detection circuit according to a first embodiment of the present disclosure, fig. 2 is a schematic diagram illustrating a cable automatic detection circuit according to a second embodiment of the present disclosure, fig. 3 is a schematic diagram illustrating a cable automatic detection circuit according to a third embodiment of the present disclosure, and fig. 4 is a schematic diagram illustrating a cable automatic detection device according to an embodiment of the present disclosure.

Referring to fig. 1, the automatic cable detection circuit according to the first embodiment of the present disclosure includes a first branch, a first switch circuit SW1, and a second switch circuit SW2.

Referring to fig. 1, the first branch may include a first power source B1, a first indicator, and a first switch SW3 connected in series with each other. The first indicator may be an LED (e.g., a red LED lamp) or a buzzer, and the first power B1 may be a 5V dc power.

The first switching circuit SW1 may be connected in parallel with the first branch and includes a first node a, a second node B and a third node C located at different positions. The second switching circuit SW2 may be connected in parallel with the first switching circuit SW 1.

The first node a is for electrical connection with a first wire in the cable, the second node B is for electrical connection with a second wire in the cable, and the third node C is for electrical connection with a third wire in the cable. The type of the cable herein is not particularly limited, but may be a DP cable or the like.

The first wire of the cable, the second wire of the cable and the third wire of the cable may be a first communication wire, a second communication wire and a ground wire (shielding wire) of the cable, respectively.

Specifically, referring to fig. 1 and 2, the cable may be a DP cable, and the first node a, the second node B, and the third node C are respectively electrically connected to a first communication signal line 3 (e.g., a communication H line), a second communication signal line 8 (e.g., a communication L line), and a ground line 5 of the DP cable.

Referring to fig. 2, the cable may be a CanOpen cable, and the first node a, the second node B, and the third node C are respectively for electrically connecting to a first communication signal line 2, a second communication signal line 7, and a ground line 5 of the CanOpen cable.

At the time of detection, the first node a, the second node B, and the third node C may be connected to the DP cable plug P1, respectively, by flying leads (i.e., to the above-described three wires in the cable). A plug can also be installed in the detection circuit, and the plug is connected with the plugs P1 or P2 at two ends of the cable to be detected in a matching way.

Specifically, referring to fig. 3, the cable automatic detection circuit of the embodiment of the present disclosure may further include a first plug P3. As an example, the cable automatic detection circuit of the embodiment of the present disclosure may further include a third plug P4. That is, a single-sided detection circuit may connect two plugs.

The first plug P3 and/or the third plug P4 may include a first terminal connected to the first node a, a second terminal connected to the second node B, and a third terminal connected to the third node C. The first plug P3 and/or the third plug P4 may further include six terminals in addition to the first terminal, the second terminal, and the third terminal, that is, the first plug P3 and/or the third plug P4 may be DB-9 plugs, and may be adapted to any one of a DP cable and a CanOpen cable. The first plug P3 may be a DB-9 male and the third plug P4 may be a DB-9 female.

As an example, the first plug P3 and the third plug P4 may be a male or female head of any one of the adaptation DP cable and the CanOpen cable, respectively. That is, the cable automatic detection circuit may be connected with the plug P1 or P2 of the cable to be detected through one of the first plug P3 and the third plug P4.

At the time of detection, one (e.g., a female) of the first plug P3 and the third plug P4 may be connected to one end of a cable to be detected, and the other end of the cable to be detected may be connected to a plug (e.g., a male) of another cable automatic detection circuit. This will be described in detail below.

The cable automatic detection device of the present disclosure may include the cable automatic detection circuit described above, and the cable automatic detection device of the present disclosure may be as shown with reference to fig. 4, and the cable automatic detection device may include a single DB-9 plug. Although not shown, the cable automatic detection device may further include another DB-9 plug located on the opposite side of the side on which the DB-9 plug is provided.

As described above, the two DB-9 plugs may be adapted to at least one of a DP cable and a CanOpen cable. When adapting a DP cable, the two DB-9 plugs may be a male and a female head, respectively.

In addition, although the cable automatic detection apparatus of the present disclosure is shown to include only the left side portion of the cable automatic detection circuit, the cable automatic detection apparatus of the present disclosure may also include the right side portion of the cable automatic detection circuit, in other words, the cable automatic detection apparatus of the present disclosure may integrate the left side portion and the right side portion of the cable automatic detection circuit, and the integrated cable automatic detection circuit may include two plugs, or may include four plugs. The construction of the right side portion of the cable automatic detection circuit may be the same as that of the left side portion of the cable automatic detection circuit described above, which will be described in detail below.

Fig. 5 is a schematic diagram showing a cable automatic detection circuit according to a fourth embodiment of the present disclosure, fig. 6 is a schematic diagram showing a cable automatic detection circuit according to a fifth embodiment of the present disclosure, fig. 7 is a schematic diagram showing a cable automatic detection circuit according to a sixth embodiment of the present disclosure, and fig. 8 is a schematic diagram showing a cable automatic detection circuit according to a seventh embodiment of the present disclosure.

Referring to fig. 5, the cable automatic detection circuit of the fourth embodiment of the present disclosure may further include a second branch, a third switch circuit SW4, and a fourth switch circuit SW5.

The second branch may include a second power source B2, a second indicator, which may include at least one of an LED (e.g., an LED lamp) and a buzzer, and a second switch SW6 connected in series with each other.

The third switching circuit SW4 may be connected in parallel with the second branch and includes fourth, fifth and sixth nodes D, E and F at different positions. The fourth switching circuit SW5 may be connected in parallel with the third switching circuit SW 4.

The fourth node D may be used for electrical connection with a first wire in the cable, the fifth node E may be used for electrical connection with a second wire in the cable, and the sixth node F may be used for electrical connection with a third wire in the cable.

The second branch, the third switch circuit SW4, and the fourth switch circuit SW5 of the cable automatic detection circuit of the fourth embodiment of the present disclosure may have the same configurations as the first branch, the first switch circuit SW1, and the second switch circuit SW2, respectively.

Although not shown, the cable automatic detection circuit of the embodiment of the present disclosure may further include a second plug and/or a fourth plug, and the configurations of the second plug and the fourth plug may be the same as the configurations of the first plug P3 and the third plug P4, respectively, as described above.

The second plug and/or the fourth plug may include a first signal terminal connected to the fourth node D, a second signal terminal connected to the fifth node E, and a third signal terminal connected to the third node C. The second and/or fourth plug may comprise six further signal terminals in addition to the first, second and third signal terminals, that is, the second and/or fourth plug may be a DB-9 plug and the second and/or fourth plug may be adapted to one of a DP cable and a CanOpen cable.

That is, the first, second, and third terminals of the first plug P3 may be respectively used to electrically connect to one end of the cable, and the first, second, and third signal terminals of the second plug may be respectively used to electrically connect to the other end of the cable. Specifically, the first terminal, the second terminal, and the third terminal may be used to electrically connect to the first communication signal line, the second communication signal line, and the ground line, respectively, and the first signal terminal, the second signal terminal, and the third signal terminal may be used to electrically connect to the first communication signal line, the second communication signal line, and the ground line, respectively.

Taking a DP cable as an example, when the cable is a DP cable and the first plug P3 or the third plug P4 is a plug adapted to the DP communication cable, the first plug P3 or the third plug P4 at the left side portion of the automatic detection circuit for cable may be inserted into the DP plug at one end of the DP cable, and the second plug or the fourth plug at the right side portion of the automatic detection circuit for cable may be inserted into the DP plug at the other end of the DP cable, thereby forming the detection circuit.

Referring to fig. 5 and 6, the first switching circuit SW1 may include a first SPDT switch or a first SPTT switch, and the third switching circuit SW4 may include a second SPDT switch or a second SPTT switch. Specifically, referring to fig. 5, when the first switching circuit SW1 includes a first SPDT switch, the third switching circuit SW4 includes a second SPTT switch. Referring to fig. 6, when the first switching circuit SW1 includes a first SPTT switch, the third switching circuit SW4 includes a second SPTT switch, and as an example, when the first switching circuit SW1 includes a first SPTT switch, the third switching circuit SW4 may include a second SPDT switch.

Referring to fig. 5, a second node B may be connected to a common terminal of a first SPDT switch, a first node a may be connected to a first terminal of the first SPDT switch, a third node C may be connected to a second terminal of the first SPDT switch, a fifth node E may be connected to a common terminal of the second SPDT switch, a fourth node D may be connected to a first terminal of the second SPDT switch, and a sixth node F may be connected to a second terminal of the second SPDT switch.

At 3-8 detection, SW2 is opened, SW3 is opened, SW1 is in a first position (common terminal is connected with first terminal), SW5 is opened, SW6 is closed, SW4 is in a second position (common terminal is connected with second terminal), that is, a first branch in the cable automatic detection circuit is opened, a second branch in the cable automatic detection circuit is turned on, and a current path can be: b2→d→a→sw1→b→e→sw4→sw6→d2→b2.

At the time of 5-8 detection, SW2 is opened, SW3 is opened, SW1 is in a second position (the common terminal is connected with the second terminal), SW5 is opened, SW6 is closed, SW4 is in a first position (the common terminal is connected with the first terminal), that is, a first branch in the cable automatic detection circuit is opened, a second branch in the cable automatic detection circuit is turned on, and a current path can be: b2→sw4→e→b→sw1→c→f→sw6→d2→b2.

During 3-5 detection, SW2 is closed, SW3 is opened, SW1 can be in a first position or a second position, SW5 is opened, SW6 is closed, SW4 is in a suspended position (or a third position), that is, a first branch in the cable automatic detection circuit is opened, a second branch in the cable automatic detection circuit is turned on, and a current path can be: b2→d→a→sw2→c→f→sw6→d2→b2.

Referring to fig. 6, the first switching circuit SW1 may include a first SPTT switch and the third switching circuit SW4 may include a second SPTT switch.

The second node B may be connected to a common terminal of the first SPTT switch, the first node a may be connected to a first terminal of the first SPTT switch, the third node C may be connected to a second terminal of the first SPTT switch, the fifth node E may be connected to a common terminal of the second SPTT switch, the fourth node D may be connected to a first terminal of the second SPTT switch, and the sixth node F may be connected to a second terminal of the second SPTT switch. SW1

At 3-8 detection, SW2 is opened, SW3 is opened, SW1 is in a first position (common terminal is connected with first terminal), SW5 is opened, SW6 is closed, SW4 is in a second position (common terminal is connected with second terminal), that is, a first branch in the cable automatic detection circuit is opened, a second branch in the cable automatic detection circuit is turned on, and the current path can be: b2→d→a→sw1→b→e→sw4→sw6→d2→b2.

At the time of 5-8 detection, SW2 is opened, SW3 is opened, SW1 is in a second position (the common terminal is connected with the second terminal), SW5 is opened, SW6 is closed, SW4 is in a first position (the common terminal is connected with the first terminal), that is, a first branch in the cable automatic detection circuit is opened, a second branch in the cable automatic detection circuit is turned on, and a current path can be: b2→sw4→e→b→sw1→c→f→sw6→d2→b2.

During 3-5 detection, SW2 is closed, SW3 is opened, SW1 can be in a first position, a second position or a suspended position (or a third position), SW5 is opened, SW6 is closed, SW4 is in a suspended position (or a third position), that is, a first branch in the cable automatic detection circuit is opened, a second branch in the cable automatic detection circuit is conducted, and a current path can be: b2→d→a→sw2→c→f→sw6→d2→b2.

Referring to fig. 7, the first switching circuit SW1 of the cable automatic detection circuit of the sixth embodiment of the present disclosure may include a first DPDT switch and/or the third switching circuit SW4 may include a second DPDT switch.

Specifically, the first node a may be connected to a first common terminal of the first DPDT switch, the second node B may be connected to a first terminal and a fourth terminal of the first DPDT switch, the third node C may be connected to a second common terminal of the first DPDT switch, the fourth node D may be connected to a second common terminal of the second DPDT switch, the fifth node E may be connected to a first terminal and a fourth terminal of the second DPDT switch, and the sixth node F may be connected to a first common terminal of the second DPDT switch. The second and third terminals of the first and second DPDT switches may be floating.

At the time of 5-8 detection, SW2 is opened, SW3 is opened, SW1 is in a first position (a first common terminal is connected with a second terminal, a second common terminal is connected with a fourth terminal), SW5 is opened, SW6 is closed, SW4 is in a first position (a first common terminal is connected with a second terminal, a second common terminal is connected with a fourth terminal), that is, a first branch in the cable automatic detection circuit is opened, a second branch in the cable automatic detection circuit is turned on, and a current path may be: b2→sw4→e→sw1→c→f→sw6→d2→b2.

At 3-8 detection, SW2 is opened, SW3 is opened, SW1 is in the second position (the first common terminal is connected with the first terminal, the second common terminal is connected with the third terminal), SW5 is opened, SW6 is closed, SW4 is in the second position (the first common terminal is connected with the first terminal, the second common terminal is connected with the third terminal), that is, the first branch in the cable automatic detection circuit is opened, the second branch in the cable automatic detection circuit is turned on, and the current path may be: b2→d→a→sw1→b→e→sw4→f→sw6→d2→b2.

At 3-5 detection, SW2 is closed, SW3 is open, SW1 is in the second position (the first common terminal is connected to the first terminal, the second common terminal is connected to the third terminal), SW5 is open, SW6 is closed, SW4 is in the first position (the first common terminal is connected to the second terminal, the second common terminal is connected to the fourth terminal), that is, the first branch in the cable automatic detection circuit is open, the second branch in the cable automatic detection circuit is on, and the current path may be: b2→d→a→sw2→c→f→sw6→d2→b2.

Referring to fig. 8, the first switching circuit SW1 includes a first SPST switch SW1-1 and a second SPST switch SW1-2 connected in series with each other, and/or the third switching circuit SW4 includes a third SPST switch SW4-1 and a fourth SPST switch SW4-2 connected in series with each other, wherein the second node B is located between a first end of the first SPST switch SW1-1 and a first end of the second SPST switch SW1-2, the first node a is connected to a second end of the first SPST switch SW1-1, the third node C is connected to a second end of the second SPST switch SW4-1, the fifth node E is located between a first end of the third SPST switch SW4-1 and a first end of the fourth SPST switch SW4-2, the fourth node D is connected to a second end of the third SPST switch SW4-1, and the sixth node F is connected to a second end of the fourth SPST switch SW 4-2.

When 5-8 is detected, SW2 is opened, SW3 is opened, SW1-1 is opened, SW1-2 is closed, SW5 is opened, SW6 is closed, SW4-1 is closed, SW4-2 is opened, a first branch in the cable automatic detection circuit is opened, a second branch in the cable automatic detection circuit is conducted, and a current path can be as follows: b2→sw4-1→e→b→sw1-2→c→f→sw6→d2→b2.

During 3-8 detection, SW2 is opened, SW3 is opened, SW1-1 is closed, SW1-2 is opened, SW5 is opened, SW6 is closed, SW4-1 is opened, SW4-2 is closed, a first branch in the cable automatic detection circuit is opened, a second branch in the cable automatic detection circuit is conducted, and a current path can be as follows: b2→d→a→sw1-1→b→e→sw4-2→sw6→d2→b2.

When 3-5 is detected, SW2 is closed, SW3 is opened, SW1-1 is opened, SW1-2 is opened, SW5 is opened, SW6 is closed, SW4-1 is opened, SW4-2 is opened, a first branch in the cable automatic detection circuit is opened, a second branch in the cable automatic detection circuit is conducted, and a current path can be as follows: b2→d→a→sw2→c→f→sw6→d2→b2.

In addition, each of the left side portion and the right side portion of the cable automatic detection circuit can complete self-inspection, and at the time of self-inspection, the cable is pulled out, SW3 and SW2 are closed to complete self-inspection of the left side portion, and SW6 and SW5 are closed to complete self-inspection of the right side portion.

Referring to fig. 5 to 8, the second switching circuit SW2 may include a fifth SPST switch, and/or the fourth switching circuit SW5 may include a sixth SPST switch, wherein a first terminal of the fifth SPST switch is connected to the first node a, a second terminal of the fifth SPST switch is connected to the third node C, a first terminal of the sixth SPST switch is connected to the fourth node D, and a second terminal of the sixth SPST switch is connected to the sixth node F.

However, the present disclosure is not limited thereto, and the second switch circuit SW2 and/or the fourth switch circuit SW5 may further include other types of switches. Each switch of the present disclosure may include a toggle switch or a micro switch, however, each switch of the present disclosure may be implemented with other types of switches (e.g., MOSFETs).

The cable detection circuit according to the embodiment of the present disclosure can detect whether a cable is normal or not.

The cable detection circuit according to the embodiment of the present disclosure can detect whether or not a cable is misconnected, avoiding various inconveniences caused by using a multimeter measurement method or the like.

According to the cable detection device disclosed by the embodiment of the disclosure, when in detection, the LED indication function is positioned at the right side part of the cable automatic detection circuit, so that the detection by personnel is facilitated.

The cable detection device according to the embodiment of the disclosure can be directly inserted into the DP head, thereby facilitating field operation and fault investigation.

The cable detection device can detect whether a line is conducted or not, and can detect whether the line is misplaced or not.

The cable detection circuit according to the embodiment of the disclosure has the advantages of simple circuit structure, easy realization, small volume, low cost and convenient carrying.

According to the cable detection device disclosed by the embodiment of the disclosure, the cable detection device can be directly connected with the DP plug in the unit, so that the communication line detection is realized in one step, the problem that the DP line is inconvenient to measure and the line crossing error is not easy to find is solved, and the cable detection device is particularly suitable for detection under the condition that the lines are arranged and bound.

Although a few exemplary embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents, e.g., the technical features of the different embodiments may be combined.

Claims (10)

1. An automatic cable detection circuit, comprising:

a first branch including a first power source (B1), a first indicator, and a first switch (SW 3) connected in series with each other;

a first switching circuit (SW 1) connected in parallel with the first branch and including a first node (a), a second node (B) and a third node (C) at different positions;

a second switching circuit (SW 2) connected in parallel with the first switching circuit (SW 1),

wherein the first node (a) is for electrical connection with a first wire in a cable, the second node (B) is for electrical connection with a second wire in the cable, and the third node (C) is for electrical connection with a third wire in the cable.

2. The automatic cable detection circuit of claim 1, further comprising:

a second branch including a second power source (B2), a second indicator, and a second switch (SW 6) connected in series with each other;

a third switching circuit (SW 4) connected in parallel with the second branch and including a fourth node (D), a fifth node (E) and a sixth node (F) at different positions;

a fourth switching circuit (SW 5) connected in parallel with the third switching circuit (SW 4),

wherein the fourth node (D) is for electrical connection with the first line, the fifth node (E) is for electrical connection with the second line, and the sixth node (F) is for electrical connection with the third line.

3. The automatic cable detection circuit of claim 2, further comprising:

a first plug including a first terminal connected to the first node (a), a second terminal connected to the second node (B), and a third terminal connected to the third node (C); and/or

A second plug comprising a first signal terminal connected to the fourth node (D), a second signal terminal connected to the fifth node (E) and a third signal terminal connected to the third node (C),

the first terminal, the second terminal and the third terminal are respectively used for being electrically connected to one end of the cable, and the first signal terminal, the second signal terminal and the third signal terminal are respectively used for being electrically connected to the other end of the cable.

4. The cable automatic detection circuit according to claim 3, wherein the cable is a DP cable, the first node (a), the second node (B), the third node (C) are respectively for electrically connecting to a first communication signal line, a second communication signal line, and a ground line of the DP cable, the first terminal, the second terminal, and the third terminal are respectively for electrically connecting to the first communication signal line, the second communication signal line, and the ground line, and the first signal terminal, the second signal terminal, and the third signal terminal are respectively for electrically connecting to the first communication signal line, the second communication signal line, and the ground line.

5. The automatic cable detection circuit of any one of claims 2 to 4, wherein,

the first switching circuit (SW 1) comprises a first SPDT switch or a first SPTT switch, and/or,

the third switching circuit (SW 4) comprises a second SPDT switch or a second SPTT switch,

wherein the second node (B) is connected to a common terminal of the first SPDT switch or the first SPTT switch, the first node (A) is connected to a first terminal of the first SPDT switch or the first SPTT switch, the third node (C) is connected to a second terminal of the first SPDT switch or the first SPTT switch,

the fifth node (E) is connected to a common terminal of the second SPDT switch or the second SPTT switch, the fourth node (D) is connected to a first terminal of the second SPDT switch or the second SPTT switch, and the sixth node (F) is connected to a second terminal of the second SPDT switch or the second SPTT switch.

6. The automatic cable detection circuit of any one of claims 2 to 4, wherein,

the first switching circuit (SW 1) comprises a first DPDT switch, and/or,

the third switching circuit (SW 4) comprises a second DPDT switch,

wherein the first node (A) is connected to a first common terminal of the first DPDT switch, the second node (B) is connected to a first terminal and a fourth terminal of the first DPDT switch, the third node (C) is connected to a second common terminal of the first DPDT switch,

the fourth node (D) is connected to the second common terminal of the second DPDT switch, the fifth node (E) is connected to the first terminal and the fourth terminal of the second DPDT switch, and the sixth node (F) is connected to the first common terminal of the second DPDT switch.

7. The automatic cable detection circuit of any one of claims 2 to 4, wherein,

the first switching circuit (SW 1) comprises a first SPST switch and a second SPST switch connected in series with each other, and/or

The third switching circuit (SW 4) comprises a third SPST switch and a fourth SPST switch connected in series with each other,

wherein the second node (B) is located between a first end of the first SPST switch and a first end of the second SPST switch, the first node (A) is connected to a second end of the first SPST switch, the third node (C) is connected to a second end of the second SPST switch,

the fifth node (E) is located between the first end of the third SPST switch and the first end of the fourth SPST switch, the fourth node (D) is connected to the second end of the third SPST switch, and the sixth node (F) is connected to the second end of the fourth SPST switch.

8. The automatic cable detection circuit according to any one of claims 2 to 4, wherein the second switching circuit (SW 2) comprises a fifth SPST switch and/or the fourth switching circuit (SW 5) comprises a sixth SPST switch,

wherein a first end of the fifth SPST switch is connected to the first node (a), a second end of the fifth SPST switch is connected to the third node (C), a first end of the sixth SPST switch is connected to the fourth node (D), and a second end of the sixth SPST switch is connected to the sixth node (F).

9. The cable automatic detection circuit of claim 2, wherein at least one of the first indicator and the second indicator comprises an LED light or a buzzer.

10. A cable automatic detection apparatus, characterized by comprising the cable automatic detection circuit according to any one of claims 1 to 9.