Cable searching and aligning implementation circuit applied to cable maintenance equipment and cable maintenance equipment

Abstract

The utility model relates to the technical field of line searching and aligning, and discloses a line searching and aligning realization circuit applied to a cable maintenance device and the cable maintenance device, the line searching and aligning realization circuit comprises a line searching signal processing circuit and a line aligning signal transmission circuit, the line searching signal processing circuit comprises a line searching signal buffer circuit and a line searching signal transmission circuit, the first end of the alignment signal transmission circuit is electrically connected with the alignment control end of the first main control circuit and is used for grounding, and the second end of the alignment signal transmission circuit is electrically connected with the first cable interface; a first end of the hunting signal buffer circuit is electrically connected with a first hunting control end of the first main control circuit, a second end of the hunting signal buffer circuit is electrically connected with a second hunting control end of the first main control circuit, and a third end of the hunting signal buffer circuit is electrically connected with a first end of the hunting signal transmission circuit; the second end of the hunting signal transmission circuit is electrically connected with the first cable interface. Therefore, the line searching and aligning implementation circuit is simple in structure, and the power consumption of the line searching and aligning can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pair-finding, and in particular to a pair-finding circuit for cable maintenance equipment and the cable maintenance equipment. Background Art

[0002] Cable maintenance equipment with multiple integrated functions has appeared on the market. When cable maintenance personnel maintain communication cables, they can not only reduce the types and quantity of cable maintenance equipment they carry, but also continue to use the same cable maintenance equipment to perform other cable maintenance functions after performing a certain cable maintenance function. This greatly improves the convenience and efficiency of cable maintenance personnel in maintaining communication cables.

[0003] Currently, the most common multifunctional cable maintenance devices integrate both line-finding and line-aligning functions. After line-finding is complete, they switch to line-aligning mode to complete the alignment process. These devices typically use an MCU to connect multiple analog switches (such as the SGM3157) to transmit line-finding signals to the cable interface circuit and switch between the two modes. This results in high power consumption when performing the line-finding function.

[0004] It can be seen that how to reduce the power consumption of cable maintenance equipment when performing the line search function is a technical problem that needs to be solved. Utility Model Content

[0005] The utility model provides a pair-finding circuit for cable maintenance equipment and the cable maintenance equipment, which can improve the efficiency and convenience of pair-finding while reducing the power consumption of the cable maintenance equipment when performing the pair-finding function.

[0006] The first aspect of the present invention discloses a line-finding implementation circuit for a cable maintenance device, wherein the cable maintenance device includes at least a host end and a slave end, wherein the host end includes at least a first main control circuit, a first cable interface, and a line-finding implementation circuit, wherein the line-finding implementation circuit includes a line-finding signal processing circuit and a line-finding signal transmission circuit, wherein the line-finding signal processing circuit includes a line-finding signal buffer circuit and a line-finding signal transmission circuit, wherein:

[0007] The first end of the line signal transmission circuit is electrically connected to the line control end of the first main control circuit and the first end of the line signal transmission circuit is used for grounding, and the second end of the line signal transmission circuit is electrically connected to the first end of the first cable interface;

[0008] The first end of the line-finding signal buffer circuit is electrically connected to the first line-finding control end of the first main control circuit, the second end of the line-finding signal buffer circuit is electrically connected to the second line-finding control end of the first main control circuit, the third end of the line-finding signal buffer circuit is electrically connected to the first end of the line-finding signal transmission circuit, the fourth end of the line-finding signal buffer circuit is used to access the power supply voltage, and the fifth end of the line-finding signal buffer circuit is used for grounding; the second end of the line-finding signal transmission circuit is electrically connected to the first end of the first cable interface, and the third end of the line-finding signal transmission circuit is used for grounding;

[0009] Wherein, in the line-finding mode of the cable maintenance device, the second end of the first cable interface is used to connect to one end of the cable to be maintained, and the other end of the cable to be maintained is used to connect to the second cable interface included in the slave end.

[0010] As an optional implementation, in the first aspect of the present utility model, the line search signal buffer circuit includes:

[0011] Channel selection drive circuit, line search signal amplification circuit and line search signal buffer output circuit;

[0012] Wherein, a first end of the channel selection drive circuit is electrically connected to the first line search control end of the first main control circuit, a second end of the channel selection drive circuit is electrically connected to the input and output channel selection end of the line search signal buffer output circuit and is used to access the power supply voltage, and a third end of the channel selection drive circuit is used to be grounded;

[0013] A first end of the line-finding signal amplifying circuit is electrically connected to the second line-finding control end of the first main control circuit, a second end of the line-finding signal amplifying circuit is electrically connected to the signal input end of the line-finding signal buffer output circuit, and a third end of the line-finding signal amplifying circuit is grounded;

[0014] The signal output end of the line-searching signal buffer output circuit is electrically connected to the first end of the line-searching signal transmission circuit.

[0015] As an optional implementation, in the first aspect of the present utility model, the channel selection drive circuit includes a first MOS transistor;

[0016] Among them, the gate of the first MOS tube is electrically connected to the first line search control end of the first main control circuit; the drain of the first MOS tube is electrically connected to the input and output channel selection end of the line search signal buffer output circuit, and the drain of the first MOS tube is used to access the power supply voltage; the source of the first MOS tube is used to be grounded.

[0017] As an optional implementation, in the first aspect of the present utility model, the line-finding signal amplifying circuit includes a second MOS transistor;

[0018] Among them, the gate of the second MOS tube is electrically connected to the second line-finding control terminal of the first main control circuit; the drain of the second MOS tube is electrically connected to the signal input terminal of the line-finding signal buffer output circuit, and the drain of the second MOS tube is used to access the power supply voltage; the source of the second MOS tube is used to be grounded.

[0019] As an optional implementation, in the first aspect of the present utility model, the line search signal buffer output circuit includes a multi-channel bus buffer;

[0020] Wherein, the multi-channel bus buffer at least includes a plurality of output enable input pins, a plurality of data input pins, a plurality of data output pins, a power pin and a ground pin;

[0021] One of the multiple output enable input pins is used as the input and output channel selection terminal of the line search signal buffer output circuit; one of the multiple data input pins is used as the signal input terminal of the line search signal buffer output circuit; and one of the multiple data output pins is used as the signal output terminal of the line search signal buffer output circuit.

[0022] As an optional implementation, in the first aspect of the present utility model, the multi-channel bus buffer includes a four-channel bus buffer, and the four-channel bus buffer model is HC125;

[0023] Among them, there is a mutual correspondence between the output enable input pin used as the input and output channel selection end of the line-finding signal buffer output circuit, the data input pin used as the signal input end of the line-finding signal buffer output circuit, and the data output pin used as the signal output end of the line-finding signal buffer output circuit.

[0024] As an optional implementation, in the first aspect of the present utility model, the host end further includes a line protection circuit;

[0025] The first end of the line signal transmission circuit is electrically connected to the line control end of the first main control circuit and the first end of the line protection circuit, and the second end of the line protection circuit is grounded.

[0026] As an optional embodiment, in the first aspect of the present utility model, the line signal transmission circuit includes a plurality of line signal transmission channels, each of the line signal transmission channels includes at least a fixed resistor and a fuse connected in series, one end of the fixed resistor is electrically connected to the line control end of the first main control circuit and the first end of the line protection circuit respectively; one end of the fuse is electrically connected to the first end of the first cable interface;

[0027] and / or,

[0028] The line-finding signal transmission circuit includes multiple first line-finding signal transmission channels and multiple second line-finding signal transmission channels, and the first line-finding signal transmission channel and the second line-finding signal transmission channel are each composed of at least one capacitor; wherein, the first end of each of the first line-finding signal transmission channels is electrically connected to the third end of the line-finding signal buffer circuit, and the second end of each of the first line-finding signal transmission channels is electrically connected to the first end of the first cable interface; the first end of each of the second line-finding signal transmission channels is electrically connected to the first end of the first cable interface, and the second end of each of the second line-finding signal transmission channels is used for grounding.

[0029] As an optional implementation, in the first aspect of the present utility model, the slave end further includes a second main control circuit and a pairing line signal receiving circuit;

[0030] Among them, the pairing line signal receiving circuit includes multiple pairing line signal receiving channels; the first end of each of the pairing line signal receiving channels is electrically connected to the first end of the second cable interface, the second end of each of the pairing line signal receiving channels is electrically connected to the pairing line control end of the second main control circuit, and the third end of each of the pairing line signal receiving channels is used for grounding.

[0031] The second aspect of the present invention discloses a cable maintenance device, which includes at least a host end and a slave end. The host end includes at least a first main control circuit and a first cable interface. The host end also includes the line-finding implementation circuit applied to the cable maintenance device as described in any one of the present inventions.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] In the utility model, a line-finding implementation circuit applied to a cable maintenance device includes a line-finding signal processing circuit and a line-finding signal transmission circuit, and the line-finding signal processing circuit includes a line-finding signal buffer circuit and a line-finding signal transmission circuit, wherein the first end of the line-finding signal transmission circuit is electrically connected to the line-finding control end of the first main control circuit in the host end of the cable maintenance device and the first end of the line-finding signal transmission circuit is used for grounding, and the second end of the line-finding signal transmission circuit is electrically connected to the first end of the first cable interface in the host end; the first end of the line-finding signal buffer circuit is electrically connected to the first line-finding control end of the first main control circuit, the second end of the line-finding signal buffer circuit is electrically connected to the second line-finding control end of the first main control circuit, the third end of the line-finding signal buffer circuit is electrically connected to the first end of the line-finding signal transmission circuit, the fourth end of the line-finding signal buffer circuit is used to access the power supply voltage, and the fifth end of the line-finding signal buffer circuit is used for grounding; the second end of the line-finding signal transmission circuit is electrically connected to the first end of the first cable interface, and the third end of the line-finding signal transmission circuit is used for grounding. In the cable maintenance device's pairing mode, the second end of the first cable interface is used to connect to one end of the cable to be maintained, and the other end of the cable to be maintained is used to connect to the second cable interface on the slave side of the cable maintenance device. This shows that the pairing circuit structure used in the cable maintenance device of the present invention is simple, effectively reducing the power consumption of the pairing circuit. Furthermore, the pairing signal and the pairing signal are not grounded, which effectively reduces or avoids common ground interference of the pairing signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is a schematic diagram of a circuit for realizing line matching in a cable maintenance device disclosed in an embodiment of the present utility model;

[0036] Figure 2 This is a schematic structural diagram of another circuit for realizing line matching in cable maintenance equipment disclosed in an embodiment of the present utility model;

[0037] Figure 3 This is a structural diagram of a first main control circuit in a host terminal disclosed in an embodiment of the present utility model;

[0038] Figure 4 This is a schematic structural diagram of a line protection circuit in a host terminal disclosed in an embodiment of the present utility model;

[0039] Figure 5This is a structural diagram of a slave end disclosed in an embodiment of the present utility model;

[0040] Figure 6 This is a structural diagram of a second master control circuit in a slave terminal disclosed in an embodiment of the present utility model;

[0041] Figure 7 The present invention is a schematic structural diagram of a line-finding signal receiving circuit at a slave end disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0043] The terms "first," "second," and so on, in the specification and claims of this utility model and the accompanying drawings are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product, or end comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed therein, or may optionally include other steps or elements inherent to such process, method, product, or end.

[0044] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] The utility model discloses a pair-finding circuit and a cable maintenance device for cable maintenance equipment, which can realize the pair-finding function through a simple pair-finding circuit, effectively reducing the pair-finding power consumption, and the pair-finding signal and the pair-finding signal are not grounded, which can also effectively reduce or avoid the common ground interference of the pair-finding signal. Figure 1-7 The wire pairing realization circuit, the host end of the cable maintenance equipment, the slave end of the cable maintenance equipment, etc. involved in the present invention are described in detail.

[0046] Example 1

[0047] See also Figure 1 , Figure 1 The present invention discloses a schematic diagram of a circuit for realizing a pairing line in a cable maintenance device. The cable maintenance device includes at least a host end 10 and a slave end 20. The host end 10 includes at least a first main control circuit 101, a first cable interface 102, and a pairing line realization circuit 103. Figure 1 As shown, the line search implementation circuit 103 includes a line search signal processing circuit 1031 and a line search signal transmission circuit 1032. The line search signal processing circuit 1031 may include a line search signal buffer circuit 10311 and a line search signal transmission circuit 10312.

[0048] A first end of the line signal transmission circuit 1032 is electrically connected to the line control end of the first main control circuit 101 and the first end of the line signal transmission circuit 1032 is grounded, and a second end of the line signal transmission circuit 1032 is electrically connected to the first end of the first cable interface 102;

[0049] A first end of the line-finding signal buffer circuit 10311 is electrically connected to a first line-finding control end of the first main control circuit 101, a second end of the line-finding signal buffer circuit 10311 is electrically connected to a second line-finding control end of the first main control circuit 101, a third end of the line-finding signal buffer circuit 10311 is electrically connected to a first end of the line-finding signal transmission circuit 10312, a fourth end of the line-finding signal buffer circuit 10311 is used to receive a power supply voltage, and a fifth end of the line-finding signal buffer circuit 10311 is used for grounding; a second end of the line-finding signal transmission circuit 10312 is electrically connected to a first end of the first cable interface 102, and a third end of the line-finding signal transmission circuit 10312 is used for grounding;

[0050] In the pairing mode of the cable maintenance device, the second end of the first cable interface 102 is used to connect to one end of the cable to be maintained, and the other end of the cable to be maintained is used to connect to the second cable interface 201 included in the slave end 20.

[0051] As can be seen, the line-finding circuit 103 described in the embodiment of the present invention has a simple structure, low cost, and can effectively reduce the power consumption of the line-finding circuit. In addition, the line signal processing circuit 1031 and the line-finding signal transmission circuit 1032 do not share a common ground, that is, the line-finding signal and the line-finding signal do not share a common ground. This can also effectively reduce or avoid common ground interference of the line-finding signal.

[0052] In an optional embodiment, if Figure 1As shown, the host end 10 may further include a line protection circuit 104. The first end of the line signal transmission circuit 1032 is electrically connected to the line control end of the first main control circuit 101 and the first end of the line protection circuit 104, and the second end of the line protection circuit 104 is used for grounding. Further, the specific circuit structure of the line protection circuit 104 can be referred to. Figure 4 , Figure 4 This is a schematic diagram of the structure of a line protection circuit in a host terminal disclosed in an embodiment of the present utility model. Figure 4 As shown, the line protection circuit 104 may include multiple line protection sub-circuits 1041, further combined with Figure 2 As can be seen from the illustrated line signal transmission circuit 1032 , the line signal transmission circuit 1032 may include a plurality of line signal transmission channels 10321 . Preferably, one line signal transmission channel 10321 corresponds to one multi-channel line protection sub-circuit 1041 .

[0053] Further optionally, the line protection sub-circuit 1041 included in the line protection circuit 104 can be specifically Figure 4 The diodes D01 to D09 shown in FIG are provided, and the anode of each diode is grounded. The cathode of each diode serves as the first end of the line protection circuit 104 and is electrically connected to the first end of the line signal transmission circuit 1032. This optional embodiment can reduce the likelihood of burnout of the first main control circuit 101 due to the connection of the maintenance cable to the host end 10 through the line protection circuit 104, thereby improving the line finding safety of the line finding implementation circuit 103.

[0054] In another optional embodiment, Figure 2 As shown, the line search signal buffer circuit 10311 includes:

[0055] Channel selection drive circuit 103111, line search signal amplification circuit 103112 and line search signal buffer output circuit 103113;

[0056] The first end of the channel selection drive circuit 103111 is electrically connected to the first line search control end of the first main control circuit 101, the second end of the channel selection drive circuit 103111 is electrically connected to the input and output channel selection end of the line search signal buffer output circuit 103113 and is used to access the power supply voltage, and the third end of the channel selection drive circuit 103111 is used for grounding;

[0057] A first end of the line-finding signal amplifying circuit 103112 is electrically connected to the second line-finding control end of the first main control circuit 101, a second end of the line-finding signal amplifying circuit 103112 is electrically connected to the signal input end of the line-finding signal buffer output circuit 103113, and a third end of the line-finding signal amplifying circuit 103112 is grounded.

[0058] The signal output end of the line-searching signal buffer output circuit 103113 is electrically connected to the first end of the line-searching signal transmission circuit 10312 .

[0059] In this optional embodiment, further optional, such as Figure 2 As shown, the above-mentioned channel selection driving circuit 103111 includes a first MOS transistor Q3;

[0060] Among them, the gate of the first MOS transistor Q3 is electrically connected to the first line search control terminal CPU_CTRO_SCAN of the first main control circuit 101; the drain of the first MOS transistor Q3 is electrically connected to the input and output channel selection terminal of the line search signal buffer output circuit 103113, and the drain of the first MOS transistor Q3 is used to access the power supply voltage; the source of the first MOS transistor Q3 is used to be grounded.

[0061] In this optional embodiment, further optional, such as Figure 2 As shown, the line-finding signal amplifying circuit 103112 includes a second MOS transistor Q4;

[0062] Among them, the gate of the second MOS tube Q4 is electrically connected to the second line search control terminal CPU_SCAN_S of the first main control circuit 101; the drain of the second MOS tube is electrically connected to the signal input terminal of the line search signal buffer output circuit 103113, and the drain of the second MOS tube is used to access the power supply voltage; the source of the second MOS tube is used to be grounded.

[0063] It can be seen that this optional embodiment can realize channel selection and signal amplification through MOS tubes respectively, and has a simple structure and low cost.

[0064] In this optional embodiment, further optional, such as Figure 2 As shown, the line-hunting signal buffer output circuit 103113 includes a multi-channel bus buffer;

[0065] Wherein, the multi-channel bus buffer comprises at least a plurality of output enable input pins, a plurality of data input pins, a plurality of data output pins, a power pin and a ground pin;

[0066] One of the multiple output enable input pins is used as the input and output channel selection terminal of the line search signal buffer output circuit 103113; one of the multiple data input pins is used as the signal input terminal of the line search signal buffer output circuit 103113; one of the multiple data output pins is used as the signal output terminal of the line search signal buffer output circuit 103113.

[0067] In this optional embodiment, further optional, such as Figure 2As shown, the multi-channel bus buffer includes a four-channel bus buffer, and the four-channel bus buffer model is HC125;

[0068] Among them, there is a mutual correspondence between the output enable input pin used as the input / output channel selection terminal of the line-finding signal buffer output circuit 103113, the data input pin used as the signal input terminal of the line-finding signal buffer output circuit 103113, and the data output pin used as the signal output terminal of the line-finding signal buffer output circuit 103113. Figure 2 Taking the four-way bus buffer in FIG1 as an example, the output enable input pins of the four-way bus buffer are OE1 to OE4, the data input pins of the four-way bus buffer are A1 to A4, and the data output pins of the four-way bus buffer are Y1 to Y4. One output enable input pin OEn corresponds to one data input pin An and one data input pin Yn. Among them, the output enable input pin OE4, which serves as the input and output channel selection terminal of the line-finding signal buffer output circuit 103113, is used as the signal input terminal of the line-finding signal buffer output circuit 103113, and the signal output terminal of the line-finding signal buffer output circuit 103113 is pin Y4. In other words, the output enable input pin OE4 controls the output state of the buffer channel corresponding to the level control pin A4, and pin A4 is the input pin of the corresponding buffer channel, while pin Y4 is the output pin of the corresponding buffer channel.

[0069] It can be seen that this optional embodiment can realize the signal buffering and output functions of the line search signal buffer output circuit 103113 through a multi-channel bus buffer, and has a simple structure.

[0070] In this optional embodiment, further optional, such as Figure 2 As shown, the line signal transmission circuit 1032 includes a plurality of line signal transmission channels 10321, each of which includes at least a fixed value resistor (such as Figure 2 R01~R09) and fuses (as shown in Figure 2 F1~F9 shown in the figure), one end of the fixed resistor is electrically connected to the line control end (i.e. MCU_L1~MCU_L9) of the first main control circuit 101 and the first end of the line protection circuit 104; one end of the fuse is electrically connected to the first end of the first cable interface 102.

[0071] In this optional embodiment, further optional, such as Figure 2As shown, the line search signal transmission circuit 10312 includes a plurality of first line search signal transmission channels 103121 and a plurality of second line search signal transmission channels 103122. The first line search signal transmission channel 103121 and the second line search signal transmission channel 103122 are each composed of at least one capacitor, and further, each may include a resistor, and the capacitor and the resistor are connected in series; wherein the first end (such as Figure 2 , R8, R16, R20, R21, and one end of R54 shown in FIG) are electrically connected to the third end of the line-finding signal buffer circuit 10311, and the second end of each first line-finding signal transmission channel 103121 (as shown in FIG) is electrically connected to the third end of the line-finding signal buffer circuit 10311. Figure 2 The first end of each second line search signal transmission channel 103122 (as shown in FIG) is electrically connected to the first end of the first cable interface 102; Figure 2 The first end of each second search signal transmission channel 103122 (as shown in FIG) is electrically connected to the first end of the first cable interface 102, and the second end of each second search signal transmission channel 103122 (as shown in FIG) is electrically connected to the first end of the first cable interface 102. Figure 2 One end of R17, R22, R23 and R53 shown in FIG are used for grounding respectively.

[0072] It can be seen that this optional embodiment can also realize the line alignment function and line tracking function respectively by fuses, resistors and capacitors, which is simple to implement and low in cost.

[0073] In another optional embodiment, the structure of the first main control circuit 101 of the host terminal 10 can be referred to Figure 3 , Figure 3 This is a schematic diagram of the structure of the first main control circuit in a host terminal disclosed in an embodiment of the present utility model. Figure 3 As shown, the first main control circuit may include a main control chip U1 of model STM32F103VET6.

[0074] In another optional embodiment, the structure of the slave end 20 can be referred to Figure 5 , Figure 5 This is a schematic diagram of the structure of a slave terminal disclosed in an embodiment of the present utility model. Figure 5 As shown, the slave end 20 includes not only a second cable interface 201 , but also a second master control circuit 202 and a pairing signal receiving circuit 203 .

[0075] Furthermore, if Figure 5 As shown, the slave end 20 may further include a first indication circuit 204 and / or a second indication circuit 205. The first indication circuit 204 is used to output the line sequence result, and the second indication circuit 205 is used to output the correlation result between the line sequence fault and the received signal strength.

[0076] In this optional embodiment, further, the structure of the second main control circuit 202 of the slave terminal 20 can be found in Figure 6 , Figure 6 This is a schematic diagram of the structure of the second master control circuit in a slave terminal disclosed in an embodiment of the present utility model. Figure 6 As shown, the second main control circuit 202 may include a main control chip U22 of model STM32F103RBT6.

[0077] In this optional embodiment, further, the structure of the pairing signal receiving circuit 203 of the slave end 20 can be found in Figure 7 , Figure 7 This is a schematic diagram of a circuit for receiving a line signal from a slave terminal disclosed in an embodiment of the present utility model. Figure 7 As shown, the pairing line signal receiving circuit 203 includes a plurality of pairing line signal receiving channels 2031, and a first end (such as Figure 7 LINE1 to LINE8) are electrically connected to the first end of the second cable interface 201, and the second end of each pairing line signal receiving channel 2031 is electrically connected to the pairing line control end of the second main control circuit 202 (as shown in FIG. Figure 7 As shown in MCU_T 1 to MCU_T 8), the third end of each pair-finding line signal receiving channel 2031 is used for grounding.

[0078] Furthermore, each pairing line signal receiving channel 2031 may include a first resistor connected in parallel (eg Figure 7 R70, R72, R74, R76, R78, R80, R82 and R84) and Zener diodes (such as Figure 7 D1, D2, D3, D4, D6, D7, D8 and D9 shown), further comprising a second resistor (such as Figure 7 The cathode of the Zener diode serves as the first end of the pair-finding line signal receiving channel 2031, the anode of the Zener diode serves as the third end of the pair-finding line signal receiving channel 2031, and the other end of the second resistor electrically connected to the cathode of the Zener diode serves as the second end of the pair-finding line signal receiving channel 2031.

[0079] It can be seen that this optional embodiment can also expand the alignment function of the slave end 20 through a simple circuit, with a simple structure and high safety. In addition, it can also facilitate cable maintenance personnel to know the alignment results, related fault information, and signal strength information directly on the slave end 20, thereby improving the efficiency and convenience of cable maintenance personnel in obtaining alignment results, related fault information, and signal strength information, which is conducive to improving cable maintenance efficiency and cable maintenance convenience.

[0080] Example 2

[0081] The embodiment of the present utility model discloses a cable maintenance device, which includes at least a host end 10 and a slave end 20, and the host end 10 includes at least a first main control circuit 101 and a first cable interface 102, and the host end 10 also includes any pairing line implementation circuit 103 described in the first embodiment. In addition, other descriptions of the host end 10 and the slave end 20 can be specifically referred to the relevant descriptions in the first embodiment, and the embodiment of the present utility model will not be repeated. It can be seen that the cable maintenance device of the embodiment of the present utility model not only integrates the pairing line function, but also has a simple pairing line implementation circuit structure for realizing the pairing line function, which can effectively reduce the power consumption of the pairing line. In addition, the line-finding signal and the pairing signal do not share the same ground, which can also effectively reduce or avoid the common ground interference of the pairing line signal.

[0082] Furthermore, the line-finding implementation principle of the cable maintenance device disclosed in the present invention is as follows: in the line-finding mode, the main control chip U1 of the host end 10 sends a line-finding signal (such as a PWM signal) to the gate of the second MOS transistor Q4. After the line-finding signal is amplified by the second MOS transistor Q4, the line-finding signal is sent to the line-finding signal transmission circuit 10312 via the four-way bus buffer U8, specifically to LINE1, 2, 4, 5, and 9 lines in the line-finding signal transmission circuit 10312, and LINE3, 6, 7, and 8 lines are grounded;

[0083] After receiving the line-finding signal, the line-finding signal processing circuit 1031 emits a sound to remind the user that the other end of the cable is connected to the second cable interface 201 of the slave end 20. After the host end 10 successfully receives the handshake signal from the slave end 20, it automatically switches to the line-finding mode.

[0084] In the line mode, the main control chip U1 of the host end 10 directly sends the line signal to the line signal transmission circuit 1032. More specifically, the main control chip U1 sends the line signal to the line signal transmission circuit 1032 in the form of a running light.

[0085] At the same time, the slave end 20 receives the line alignment signal through the cable, and the first indication circuit 204 of the slave end 20 and the line sequence light of the host end 10 are synchronously lit to detect whether the cable is abnormal.

[0086] It should be further noted that in addition to the functional circuits mentioned in the present invention, the cable maintenance equipment may also include other functional circuits, such as a power supply circuit, a power status indication circuit, a button circuit, a mode selection circuit, a length measurement circuit, etc., and the present invention does not limit this.

[0087] The embodiments of the cable maintenance equipment and other related circuit structures described above are merely illustrative. The electronic components described as separate parts may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., they may be located in a single location or distributed across multiple network modules. Some or all of these modules may be selected based on actual needs to achieve the objectives of this embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0088] Finally, it should be noted that the line-finding circuit and cable maintenance equipment disclosed in the embodiments of the present invention are only preferred embodiments of the present invention, and are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A pair-finding circuit for a cable maintenance device, the cable maintenance device comprising at least a host end (10) and a slave end (20), the host end (10) comprising at least a first main control circuit (101), a first cable interface (102) and a pair-finding circuit (103), characterized in that: The line search implementation circuit (103) comprises a line search signal processing circuit (1031) and a line search signal transmission circuit (1032), and the line search signal processing circuit (1031) comprises a line search signal buffer circuit (10311) and a line search signal transmission circuit (10312), wherein: The first end of the line signal transmission circuit (1032) is electrically connected to the line control end of the first main control circuit (101), and the first end of the line signal transmission circuit (1032) is used for grounding, and the second end of the line signal transmission circuit (1032) is electrically connected to the first end of the first cable interface (102); The first end of the line-finding signal buffer circuit (10311) is electrically connected to the first line-finding control end of the first main control circuit (101); the second end of the line-finding signal buffer circuit (10311) is electrically connected to the second line-finding control end of the first main control circuit (101); the third end of the line-finding signal buffer circuit (10311) is electrically connected to the first end of the line-finding signal transmission circuit (10312); the fourth end of the line-finding signal buffer circuit (10311) is used to access the power supply voltage; the fifth end of the line-finding signal buffer circuit (10311) is used to be grounded; the second end of the line-finding signal transmission circuit (10312) is electrically connected to the first end of the first cable interface (102); and the third end of the line-finding signal transmission circuit (10312) is used to be grounded.

2. The line-matching circuit for cable maintenance equipment according to claim 1, characterized in that: The line-finding signal buffer circuit (10311) comprises: A channel selection drive circuit (103111), a line search signal amplifying circuit (103112), and a line search signal buffer output circuit (103113); Wherein, a first end of the channel selection drive circuit (103111) is electrically connected to a first line search control end of the first main control circuit (101), a second end of the channel selection drive circuit (103111) is electrically connected to an input / output channel selection end of the line search signal buffer output circuit (103113) and is used to access the power supply voltage, and a third end of the channel selection drive circuit (103111) is used to be grounded; A first end of the line-finding signal amplifying circuit (103112) is electrically connected to a second line-finding control end of the first main control circuit (101); a second end of the line-finding signal amplifying circuit (103112) is electrically connected to a signal input end of the line-finding signal buffer output circuit (103113); and a third end of the line-finding signal amplifying circuit (103112) is grounded. The signal output end of the line-finding signal buffer output circuit (103113) is electrically connected to the first end of the line-finding signal transmission circuit (10312).

3. The line-matching circuit for cable maintenance equipment according to claim 2, characterized in that: The channel selection drive circuit (103111) includes a first MOS transistor; The gate of the first MOS transistor is electrically connected to the first line search control terminal of the first main control circuit (101); the drain of the first MOS transistor is electrically connected to the input and output channel selection terminal of the line search signal buffer output circuit (103113), and the drain of the first MOS transistor is used to access the power supply voltage; and the source of the first MOS transistor is used to be grounded.

4. The line-matching circuit for cable maintenance equipment according to claim 2 or 3, characterized in that: The line-finding signal amplifying circuit (103112) includes a second MOS tube; The gate of the second MOS transistor is electrically connected to the second line-finding control terminal of the first main control circuit (101); the drain of the second MOS transistor is electrically connected to the signal input terminal of the line-finding signal buffer output circuit (103113), and the drain of the second MOS transistor is used to access the power supply voltage; and the source of the second MOS transistor is used to be grounded.

5. The line-matching circuit for cable maintenance equipment according to claim 2 or 3, characterized in that: The line-finding signal buffer output circuit (103113) includes a multi-channel bus buffer; Wherein, the multi-channel bus buffer at least includes a plurality of output enable input pins, a plurality of data input pins, a plurality of data output pins, a power pin and a ground pin; One of the multiple output enable input pins is used as the input / output channel selection terminal of the line search signal buffer output circuit (103113); one of the multiple data input pins is used as the signal input terminal of the line search signal buffer output circuit (103113); and one of the multiple data output pins is used as the signal output terminal of the line search signal buffer output circuit (103113).

6. The line-matching circuit for cable maintenance equipment according to claim 5, characterized in that: The multi-channel bus buffer includes a four-channel bus buffer, and the four-channel bus buffer model is HC125; Among them, there is a mutual correspondence between the output enable input pin used as the input and output channel selection end of the line search signal buffer output circuit (103113), the data input pin used as the signal input end of the line search signal buffer output circuit (103113), and the data output pin used as the signal output end of the line search signal buffer output circuit (103113).

7. The line-pairing circuit for cable maintenance equipment according to any one of claims 1, 2, 3 and 6, characterized in that: The host end (10) further includes a line protection circuit (104); The first end of the line signal transmission circuit (1032) is electrically connected to the line control end of the first main control circuit (101) and the first end of the line protection circuit (104), and the second end of the line protection circuit (104) is used for grounding.

8. The line-matching circuit for cable maintenance equipment according to claim 7, characterized in that: The line signal transmission circuit (1032) comprises a plurality of line signal transmission channels (10321), each of the line signal transmission channels (10321) comprising at least a fixed resistor and a fuse connected in series, one end of the fixed resistor being electrically connected to the line control end of the first main control circuit (101) and the first end of the line protection circuit (104); and one end of the fuse being electrically connected to the first end of the first cable interface (102); and / or, The line-finding signal transmission circuit (10312) includes a plurality of first line-finding signal transmission channels (103121) and a plurality of second line-finding signal transmission channels (103122), and the first line-finding signal transmission channels (103121) and the second line-finding signal transmission channels (103122) are each composed of at least one capacitor; wherein, the first end of each of the first line-finding signal transmission channels (103121) is respectively electrically connected to the third end of the line-finding signal buffer circuit (10311), and the second end of each of the first line-finding signal transmission channels (103121) is respectively electrically connected to the first end of the first cable interface (102); the first end of each of the second line-finding signal transmission channels (103122) is respectively electrically connected to the first end of the first cable interface (102), and the second end of each of the second line-finding signal transmission channels (103122) is respectively used for grounding.

9. The line-matching circuit for cable maintenance equipment according to claim 8, characterized in that: The slave end (20) further includes a second main control circuit (202) and a pairing line signal receiving circuit (203); The pairing line signal receiving circuit (203) comprises a plurality of pairing line signal receiving channels (2031); a first end of each pairing line signal receiving channel (2031) is electrically connected to a first end of a second cable interface (201), a second end of each pairing line signal receiving channel (2031) is electrically connected to a pairing line control end of the second main control circuit (202), and a third end of each pairing line signal receiving channel (2031) is grounded.

10. A cable maintenance device, comprising at least a host end (10) and a slave end (20), wherein the host end (10) comprises at least a first main control circuit (101) and a first cable interface (102), characterized in that: The host end (10) further comprises a line-pairing circuit for cable maintenance equipment according to any one of claims 1 to 8.

Images