Optical fiber fault detection circuit and multifunctional cable maintenance equipment

Abstract

The utility model relates to the technical field of multifunctional cable maintenance equipment, and discloses an optical fiber fault detection circuit and multifunctional cable maintenance equipment, the optical fiber fault detection circuit is integrated in the multifunctional cable maintenance equipment and comprises a detection signal output sub-circuit and an optical fiber detection control sub-circuit, the optical fiber detection control sub-circuit is used for receiving an optical fiber detection enable signal output by the main control chip and outputting a control signal to the detection signal output sub-circuit according to the optical fiber detection enable signal; and the detection signal output sub-circuit is used for outputting an optical fiber fault detection signal to the optical fiber to be subjected to fault detection according to the control signal. Therefore, the optical fiber fault detection circuit can be integrated on multifunctional cable maintenance equipment (such as hunting receiving equipment), optical fiber fault detection can be realized without carrying special optical fiber fault detection equipment, and the optical fiber fault detection efficiency and convenience can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of multifunctional cable maintenance equipment, in particular to an optical fiber fault detection circuit and a multifunctional cable maintenance equipment. Background Art

[0002] At present, in order to improve the efficiency and reliability of cable maintenance, the cable maintenance method has been transformed from the original manual observation and / or simple measurement method to the maintenance method through cable maintenance equipment (such as line finding equipment, line matching equipment, line measuring equipment, etc.). Maintaining the cables through cable maintenance equipment is not only conducive to improving the cable maintenance efficiency, but also the corresponding results can be directly displayed by the cable maintenance equipment without relying on the experience of maintenance personnel. This also improves the reliability of cable maintenance to a certain extent.

[0003] When maintaining cables with cable maintenance equipment, optical fiber fault detection is one of the important cable maintenance items, and maintenance personnel are usually required to carry special optical fiber fault detection equipment. If special optical fiber fault detection equipment is not carried, optical fiber fault detection cannot be realized in time, which is not conducive to improving the efficiency and convenience of optical fiber fault detection. Utility Model Content

[0004] The utility model provides an optical fiber fault detection circuit and a multifunctional cable maintenance device, which can integrate the optical fiber fault detection circuit on the cable maintenance device, and can realize optical fiber fault detection without carrying special optical fiber fault detection equipment, which is beneficial to improving the efficiency and convenience of optical fiber fault detection.

[0005] In order to solve the above technical problems, the utility model discloses, in a first aspect, an optical fiber fault detection circuit, which is integrated in a multifunctional cable maintenance device, and comprises:

[0006] Detection signal output sub-circuit;

[0007] An optical fiber detection control subcircuit, wherein the signal output end of the optical fiber detection control subcircuit is electrically connected to the signal input end of the detection signal output subcircuit, the enabling end of the optical fiber detection control subcircuit is used to electrically connect to the optical fiber detection control end of the main control chip in the multifunctional cable maintenance device, the grounding end of the optical fiber detection control subcircuit is used to be grounded, and the power supply end of the optical fiber detection control subcircuit is used to electrically connect to a power supply, and the power supply is used to power the optical fiber fault detection circuit;

[0008] Among them, the optical fiber detection control subcircuit is used to receive the optical fiber detection enable signal output by the main control chip, and output a control signal to the detection signal output subcircuit according to the optical fiber detection enable signal; the detection signal output subcircuit is used to output an optical fiber fault detection signal to the optical fiber to be detected for fault according to the control signal.

[0009] As an optional implementation, in the first aspect of the utility model, the optical fiber fault detection circuit further includes a feedback subcircuit, wherein:

[0010] One end of the feedback subcircuit is electrically connected to the feedback end of the detection signal output subcircuit and the detection end of the optical fiber detection control subcircuit, and the other end of the feedback subcircuit is grounded;

[0011] The feedback subcircuit is used to collect the working parameters corresponding to the detection signal output subcircuit and feed back the working parameters to the optical fiber detection control subcircuit;

[0012] Wherein, the operating parameters at least include an operating voltage and / or an operating current.

[0013] As an optional implementation, in the first aspect of the utility model, the optical fiber fault detection circuit further includes: a protection subcircuit corresponding to the detection signal output subcircuit, wherein:

[0014] One end of the protection subcircuit is electrically connected to the signal output end of the optical fiber detection control subcircuit and the signal input end of the detection signal output subcircuit;

[0015] The other end of the protection subcircuit is electrically connected to the feedback end of the detection signal output subcircuit and the detection end of the optical fiber detection control subcircuit respectively.

[0016] As an optional implementation, in the first aspect of the utility model, the protection subcircuit includes: a power-on protection subcircuit and / or a power-off protection subcircuit.

[0017] As an optional implementation, in the first aspect of the utility model, the power-on protection subcircuit includes a capacitor C1.

[0018] As an optional implementation, in the first aspect of the utility model, the power-off protection subcircuit includes a diode D1;

[0019] The anode of the diode D1 is electrically connected to the feedback end of the detection signal output subcircuit and the detection end of the optical fiber detection control subcircuit respectively;

[0020] The cathode of the diode D1 is electrically connected to the signal output end of the optical fiber detection control subcircuit and the signal input end of the detection signal output subcircuit.

[0021] As an optional implementation, in the first aspect of the present utility model, the feedback sub-circuit includes a resistor R1.

[0022] The second aspect of the utility model discloses a multifunctional cable maintenance device, which at least includes any optical fiber fault detection circuit and a main control chip disclosed in the first aspect of the utility model.

[0023] As an optional implementation, in the second aspect of the utility model, the multifunctional cable maintenance device further includes a crystal plug detection circuit, and the crystal plug detection circuit includes:

[0024] A signal generating subcircuit, wherein the control end of the signal generating subcircuit is electrically connected to the crimping control signal output end of the main control chip, and the crimping test channel of the signal generating subcircuit is electrically connected to the cable access port, and the cable access port is used for cable access;

[0025] A signal conversion subcircuit, wherein the input end of the signal conversion subcircuit is electrically connected to the signal output end of the signal generation subcircuit, and the output end of the signal conversion subcircuit is electrically connected to the crimping detection signal input end of the main control chip.

[0026] As an optional implementation, in the second aspect of the utility model, the multifunctional cable maintenance device is a line-finding receiving device, and the multifunctional cable maintenance device further includes a line-finding circuit, and the line-finding circuit includes:

[0027] A line-finding signal receiving subcircuit, one end of which is used to receive a line-finding signal sent by a matching line-finding transmitting device, and the other end of which is electrically connected to a line-finding signal input end of the main control chip;

[0028] A line-finding result output subcircuit, wherein a control end of the line-finding result output subcircuit is electrically connected to a line-finding result output end of the main control chip;

[0029] A power supply subcircuit, wherein the power supply output end of the power supply subcircuit is electrically connected to the power supply end of the main control chip, and the power supply subcircuit is used to supply power to the multifunctional cable maintenance device.

[0030] The implementation of this utility model has the following beneficial effects:

[0031] The optical fiber fault detection circuit disclosed in the utility model is integrated in a multifunctional cable maintenance device, and includes: a detection signal output subcircuit and an optical fiber detection control subcircuit, the optical fiber detection control subcircuit is used to receive the optical fiber detection enable signal output by the main control chip, and output a control signal to the detection signal output subcircuit according to the optical fiber detection enable signal; the detection signal output subcircuit is used to output an optical fiber fault detection signal to the optical fiber to be detected for fault according to the control signal. It can be seen that the utility model can integrate an optical fiber fault detection circuit on a multifunctional cable maintenance device (such as a line-finding receiving device), and optical fiber fault detection can be realized without carrying a special optical fiber fault detection device, which is conducive to improving the efficiency and convenience of optical fiber fault detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

[0033] Figure 1 It is a structural schematic diagram of an optical fiber fault detection circuit applied to a multifunctional cable maintenance device disclosed in an embodiment of the utility model;

[0034] Figure 2 It is a structural schematic diagram of another optical fiber fault detection circuit applied to a multifunctional cable maintenance device disclosed in an embodiment of the utility model;

[0035] Figure 3 It is a structural schematic diagram of a multifunctional cable maintenance device disclosed in an embodiment of the utility model;

[0036] Figure 4 It is a structural schematic diagram of another multifunctional cable maintenance device disclosed in an embodiment of the utility model;

[0037] Figure 5 It is a structural schematic diagram of a crystal head detection circuit disclosed in an embodiment of the utility model;

[0038] Figure 6 This is a schematic diagram of the structure of a main control chip of a line-finding receiving device disclosed in an embodiment of the utility model;

[0039] Figure 7 It is a structural schematic diagram of a line-finding signal receiving subcircuit of a line-finding receiving device disclosed in an embodiment of the utility model;

[0040] Figure 8 It is a structural schematic diagram of a line-finding result output subcircuit of a line-finding receiving device disclosed in an embodiment of the utility model;

[0041] Fig. 9 The utility model discloses a schematic diagram of a power supply subcircuit of a line-finding receiving device. DETAILED DESCRIPTION

[0042] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the utility model and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection or an integrated electrical connection; it can be a mechanical electrical connection or a mutual communication connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. In addition, the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0044] The utility model discloses an optical fiber fault detection circuit and a multifunctional cable maintenance device, which can integrate an optical fiber fault detection circuit on a multifunctional cable maintenance device (such as a line-finding receiving device), and can realize optical fiber fault detection without carrying a special optical fiber fault detection device, which is conducive to improving the efficiency and convenience of optical fiber fault detection, and can also improve the user's experience of the cable maintenance device. Specifically, when the optical fiber fault detection circuit is integrated on the line-finding receiving device to form a multifunctional cable maintenance device, based on the multifunctional cable maintenance device, not only can fast line-finding be realized, but also optical fiber fault detection and optical fiber fault point positioning, such as optical fiber breakpoints, optical fiber bending points, and leakage points, can be realized quickly and conveniently. The following is a detailed description of each.

[0045] Embodiment 1

[0046] See also Figure 1 , Figure 1 This is a schematic diagram of a structure of an optical fiber fault detection circuit for a multifunctional cable maintenance device disclosed in an embodiment of the utility model. Figure 1The optical fiber fault detection circuit 101 shown is integrated in the multifunctional cable maintenance device 10, and the optical fiber fault detection circuit 101 includes:

[0047] Detection signal output subcircuit 1011;

[0048] The optical fiber detection control subcircuit 1012, the signal output end of the optical fiber detection control subcircuit 1012 is electrically connected to the signal input end of the detection signal output subcircuit 1011, the enable end of the optical fiber detection control subcircuit 1012 is used to electrically connect to the optical fiber detection control end of the main control chip 102 in the multi-functional cable maintenance device 10, the grounding end of the optical fiber detection control subcircuit 1012 is used for grounding, and the power supply end of the optical fiber detection control subcircuit 1012 is used to electrically connect to the power supply 1015, and the power supply 1015 is used to power the optical fiber fault detection circuit 101.

[0049] Among them, the optical fiber detection control subcircuit 1012 is used to receive the optical fiber detection enable signal (such as a high level signal) output by the main control chip 102, and output a control signal (such as a voltage signal, a current signal, etc.) to the detection signal output subcircuit 1011 according to the optical fiber detection enable signal; the detection signal output subcircuit 1011 is used to output an optical fiber fault detection signal to the optical fiber to be detected for fault according to the control signal. Optionally, the optical fiber fault detection signal can be an optical signal, and further, the optical signal can be a red light signal.

[0050] It can be seen that the embodiments of the utility model can integrate the optical fiber fault detection circuit on the multifunctional cable maintenance equipment (such as the line-finding receiving equipment), and can realize the optical fiber fault detection without carrying a special optical fiber fault detection equipment, which is beneficial to improving the efficiency and convenience of optical fiber fault detection, and can also improve the user experience of the cable maintenance equipment. Specifically, when the optical fiber fault detection circuit is integrated on the line-finding receiving equipment to form a multifunctional cable maintenance equipment, based on the multifunctional cable maintenance equipment, not only can fast line finding be realized, but also optical fiber fault detection and optical fiber fault point positioning, such as optical fiber breakpoints, optical fiber bending points, and leakage points, can be realized quickly and conveniently.

[0051] In an optional embodiment, if Figure 2 As shown, the optical fiber fault detection circuit 101 further includes a feedback subcircuit 1013, wherein:

[0052] One end of the feedback subcircuit 1013 is electrically connected to the feedback end of the detection signal output subcircuit 1011 and the detection end of the optical fiber detection control subcircuit 1012, and the other end of the feedback subcircuit 1013 is grounded;

[0053] The feedback subcircuit 1013 is used to collect the working parameters corresponding to the detection signal output subcircuit 1011 and feed back the working parameters to the optical fiber detection control subcircuit 1012; wherein the working parameters at least include the working voltage and / or the working current.

[0054] Further optional, such as Figure 2 As shown, the feedback subcircuit 1013 may include a resistor R1.

[0055] In this optional embodiment, after receiving the working parameters fed back by the feedback subcircuit 1013, the optical fiber detection control subcircuit 1012 determines whether the detection signal output subcircuit 1011 is working in a voltage-stabilized, constant-current state. Further, if it is determined that the detection signal output subcircuit 1011 is not working in a voltage-stabilized, constant-current state, the control signal output to the detection signal output subcircuit 1011 can be further adjusted to achieve voltage-stabilized, constant-current control of the detection signal output subcircuit 1011, thereby improving the output stability of the optical fiber fault detection signal. In addition, the feedback or collection of working parameters through resistors is also conducive to reducing circuit costs.

[0056] In another optional embodiment, Figure 2 As shown, the optical fiber fault detection circuit 101 further includes: a protection subcircuit 1014 corresponding to the detection signal output subcircuit 1011, wherein:

[0057] One end of the protection subcircuit 1014 is electrically connected to the signal output end of the optical fiber detection control subcircuit 1012 and the signal input end of the detection signal output subcircuit 1011;

[0058] The other end of the protection sub-circuit 1014 is electrically connected to the feedback end of the detection signal output sub-circuit 1011 and the detection end of the optical fiber detection control sub-circuit 1012 respectively.

[0059] It can be seen that this optional embodiment can also improve the control security of the main control chip 102 over the optical fiber fault detection circuit 101 through the protection sub-circuit 1014 .

[0060] In yet another optional embodiment, Figure 2 As shown, the protection subcircuit 1014 includes: a power-on protection subcircuit 10141 and / or a power-off protection subcircuit 10142 .

[0061] In this optional embodiment, further optional, such as Figure 2 As shown, the power-on protection sub-circuit 10141 includes a capacitor C1.

[0062] In this optional embodiment, further optional, such as Figure 2 As shown, the power-off protection subcircuit 10142 includes a diode D1. Wherein:

[0063] The anode of the diode D1 is electrically connected to the feedback end of the detection signal output subcircuit 1011 and the detection end of the optical fiber detection control subcircuit 1012 respectively;

[0064] The cathode of the diode D1 is electrically connected to the signal output end of the optical fiber detection control subcircuit 1012 and the signal input end of the detection signal output subcircuit 1011 .

[0065] It can be seen that this optional embodiment can not only improve the safety of the optical fiber fault detection circuit 101 when it is powered on through the power-on protection subcircuit 10141, but also improve the safety of the optical fiber fault detection circuit 101 when it is powered off through the power-off protection subcircuit 10142. In addition, the power-on protection and the power-off protection are respectively realized by capacitors and diodes, which is also conducive to reducing circuit costs.

[0066] In yet another optional embodiment, Figure 2 As shown, the optical fiber fault detection circuit 101 may also include the above-mentioned power supply 1015, and the power supply 1015 is used to perform a voltage adjustment operation on the original voltage to obtain the power supply voltage required by the optical fiber fault detection circuit 101, such as by Figure 2 U2 in the circuit performs a voltage reduction operation on the original high voltage 8V to obtain the power supply voltage 5V required by the optical fiber fault detection circuit 101.

[0067] It should be noted that the optical fiber detection control subcircuit 1012 is specifically composed of Figure 2 The chip U13 shown in the figure is implemented, and U13 can be specifically SGM2019-ADJYN5G. Among them, pin 3 of U13 is used as the enable end of the optical fiber detection control subcircuit 1012, pin 5 of U13 is used as the signal output end of the optical fiber detection control subcircuit 1012, and pin 4 of U13 is used as the detection end of the optical fiber detection control subcircuit 1012. The above-mentioned power supply 1015 can be specifically composed of Figure 2 The chip U14 shown in FIG. 1 is implemented, which can be specifically LY2509C50M. And the detection signal output sub-circuit 1011 is specifically Figure 2 The light emitting device J0 in the embodiment can be a red light emitting device. The pin 1 of the light emitting device J0 is used as the signal input terminal of the detection signal output subcircuit 1011, and the pin 2 of the light emitting device J0 is used as the feedback terminal of the detection signal output subcircuit 1011.

[0068] It can be seen that implementation Figure 2The described optical fiber fault detection circuit 101 can integrate the optical fiber fault detection circuit on the multifunctional cable maintenance equipment (such as the line search receiving equipment), and can realize the optical fiber fault detection without carrying a special optical fiber fault detection equipment, which is conducive to improving the efficiency and convenience of optical fiber fault detection, and can also improve the user's experience of the cable maintenance equipment. Specifically, when the optical fiber fault detection circuit is integrated on the line search receiving equipment to form a multifunctional cable maintenance equipment, based on the multifunctional cable maintenance equipment, not only can fast line search be realized, but also optical fiber fault detection and optical fiber fault point positioning, such as optical fiber breakpoints, optical fiber bending points, and leakage points, can be realized quickly and conveniently. In addition, the working state of the detection signal output subcircuit 1011 can be judged through the feedback subcircuit 1013. Further, the control signal can be adaptively adjusted according to the judgment result to realize the voltage stabilization and constant current control of the detection signal output subcircuit 1011, thereby improving the output stability of the optical fiber fault detection signal. In addition, the protection sub-circuit 1014 can also be used to improve the control security of the main control chip 102 over the optical fiber fault detection circuit 101. Furthermore, the power-on protection sub-circuit 10141 can be used to improve the security of the optical fiber fault detection circuit 101 when it is powered on, and the power-off protection sub-circuit 10142 can be used to improve the security of the optical fiber fault detection circuit 101 when it is powered off.

[0069] Embodiment 2

[0070] See also Figure 3 , Figure 3 This is a schematic diagram of the structure of a multifunctional cable maintenance device disclosed in an embodiment of the utility model. Figure 3 The multifunctional cable maintenance device 10 shown includes at least the optical fiber fault detection circuit 101 and the main control chip 102 described in any one of the first embodiments.

[0071] It should be particularly noted that the multifunctional cable maintenance device 10 also needs to include a basic functional circuit, which is used to implement the basic functions of the multifunctional cable maintenance device 10 .

[0072] It can be seen that implementation Figure 3 The described embodiment can integrate a fiber optic fault detection circuit on the multifunctional cable maintenance device 10, and can realize fiber optic fault detection without carrying a special fiber optic fault detection device, which is beneficial to improving the efficiency and convenience of fiber optic fault detection, and can also improve the user experience of the cable maintenance device.

[0073] In an optional embodiment, if Figure 4 As shown, the multifunctional cable maintenance device 10 further includes a crystal plug detection circuit 103, and the crystal plug detection circuit 103 includes:

[0074] The signal generating subcircuit 1031, the control end of the signal generating subcircuit 1031 is electrically connected to the crimping control signal output end of the main control chip 102, and the crimping test channel of the signal generating subcircuit 1031 is electrically connected to the cable access port, and the cable access port is used for cable access;

[0075] The signal conversion sub-circuit 1032 has an input end electrically connected to a signal output end of the signal generation sub-circuit 1031 , and an output end of the signal conversion sub-circuit 1032 electrically connected to a crimping detection signal input end of the main control chip 102 .

[0076] Further optional, such as Figure 4 As shown, the crystal plug detection circuit 103 may also include: a crimping condition output circuit 1033, the input end of which is electrically connected to the crimping detection result output end of the main control chip 102. The crimping condition output circuit 1033 is used to output corresponding indication information according to the crimping detection result provided by the main control chip 102.

[0077] It should be particularly noted that: if the basic function of the multifunctional cable maintenance device 10 is a crimping test function, the basic function circuit mentioned above is the crystal plug detection circuit 103 .

[0078] It can be seen that this optional embodiment can also integrate the crimping test function in the multifunctional cable maintenance device 10, further enriching the functions of the multifunctional cable maintenance device 10, so that the crimping test of the cable can be realized while performing basic maintenance operations on the cable, which is conducive to improving the convenience and efficiency of the crimping test of the cable. In addition, the crimping condition output circuit 1033 can be integrated in the crystal head detection circuit 103, expanding the indication function of the crystal head detection circuit 103, which is conducive to improving the indication efficiency and convenience of the crimping detection results, and thus is conducive to improving the efficiency and convenience of the relevant personnel in obtaining the crimping detection results.

[0079] Further optional, such as Figure 4 As shown, the signal conversion subcircuit 1032 may include an inverter 10321 and a feedback circuit 10322, wherein:

[0080] The input end of the inverter 10321 is electrically connected to the signal output end of the signal generating sub-circuit 1031, the output end of the inverter 10321 is electrically connected to one end of the feedback circuit 10322 and the crimping detection signal input end of the main control chip 101, the power supply end of the inverter 10321 is used to electrically connect to the power supply, and the ground end of the inverter 10321 is used for grounding; the other end of the feedback circuit 10322 is electrically connected to the input end of the inverter 10321.

[0081] In this optional embodiment, the signal output end of the signal generating subcircuit 1031 outputs an analog signal corresponding to the current capacitance value of the channel to be measured. After the analog signal is output to the signal conversion subcircuit 1032, a frequency pulse signal corresponding to the aforementioned analog signal is generated under the joint action of the inverter 10321 and the feedback circuit 10322. In this way, analog-to-digital conversion is realized based on the inverter 10321 and the feedback circuit 10322 to convert the analog signal into a frequency pulse signal that can be identified and judged by the main control chip 101, which is beneficial to ensure the reliability and accuracy of crimping detection based on the main control chip of the line finding receiving device after the crystal head detection circuit 103 is integrated on the line finding receiving device.

[0082] In this optional embodiment, further, the signal conversion subcircuit 1032 further includes an output protection subcircuit 10323, wherein:

[0083] One end of the output protection sub-circuit 10323 is electrically connected to the output end of the inverter 10321, and the other end of the output protection sub-circuit 10323 is electrically connected to the pressure connection detection signal input end of the main control chip 101;

[0084] and / or,

[0085] The signal conversion sub-circuit 1032 further includes an AC filtering sub-circuit 10324 , one end of which is electrically connected to the power supply end of the inverter 10321 , and the other end of which is grounded.

[0086] It can be seen that this optional embodiment can not only reduce the impact of the pulse frequency signal output by the inverter 10321 on the main control chip 101 through the output protection sub-circuit 10323, but also improve the stability of the power supply for the signal conversion sub-circuit 1032 by setting an AC filter sub-circuit 10324 at the power supply end of the signal conversion sub-circuit 1032, which is beneficial to improve the stability and reliability of the signal conversion performed by the signal conversion sub-circuit 1032.

[0087] In this optional embodiment, the crystal plug detection circuit 103 also includes an access protection subcircuit 1034 corresponding to each crimping test channel. For any crimping test channel, one end of the access protection subcircuit 1034 corresponding to the crimping test channel is used to electrically connect the access port corresponding to the crimping test channel in the cable access port, and the other end of the corresponding access protection subcircuit 1034 is electrically connected to the crimping test channel. It can be seen that the way of setting the access protection subcircuit 1034 between the access port and the crimping test channel can reduce the occurrence of abnormalities in the cable access port or the crimping test channel due to cable access.

[0088] Further optionally, the crimping status output circuit 1033 may also include an indication protection subcircuit 10332 corresponding to the indicator light 10331 .

[0089] It can be seen that this optional embodiment can intuitively output the crimping detection results through the indicator light 10331, and can also protect the indicator light through the indication protection subcircuit 10332, which is beneficial to saving the cost required to output the crimping detection results, and can also reduce the probability of the indicator light 10331 being damaged, thereby improving its safety.

[0090] In another optional embodiment, the specific circuit structure of the above-mentioned crystal plug detection circuit 103 can be as follows: Figure 5 As shown, Figure 5 This is a schematic diagram of the structure of a crystal head detection circuit disclosed in the embodiment of the utility model. Figure 5 As shown, the signal generation subcircuit 1031 may include U5, which is specifically an 8-channel multiplexer RS2251, Figure 5 In the example, pins 1, 2, 4, 5 and 12-15 of U5 are used as crimping test channels, pins 9-11 of U5 are used as control terminals of the signal generation subcircuit 1031 (which can also be understood as control terminals of the channel to be tested), and pin 3 of U5 is used as the signal output terminal of the signal generation subcircuit 1031; the inverter 10321 of the signal conversion subcircuit 1032 can correspond to Figure 5 In U4, pin 2 of U4 is used as the input end of the signal conversion subcircuit 1032, pin 4 of U4 is used as the output end of the signal conversion subcircuit 1032, pin 3 of U4 is used as the ground end, pin 5 of U4 is used as the power end, and the feedback circuit 10322 may include a resistor R11, the output protection subcircuit 10323 may include a resistor R10, and the AC filter subcircuit 10324 may include a capacitor C7. It should be particularly noted that in actual applications, the main control chip 102 can output a pulse square wave signal or a high and low level signal to pins 9-11 of U5, and U5 determines the current channel to be tested based on the correspondence between the pre-stored pulse square wave signal / high and low level signal and the crimping test channel.

[0091] Further, such as Figure 5 As shown, J3 is used as a cable access port, and the access protection subcircuit 1034 corresponding to each crimping test channel may include a protection resistor, Figure 4 The access protection sub-circuits 1034 corresponding to the eight crimping test channels correspond to Figure 5 R30-R37 in.

[0092] Further, such as Figure 4 As shown, the multifunctional cable maintenance device 10 can be a line-finding receiving device, and the multifunctional cable maintenance device 10 also includes a line-finding circuit 104, and the line-finding circuit 104 includes:

[0093] A line-finding signal receiving subcircuit 1041, one end of which is used to receive a line-finding signal sent by a matching line-finding transmitting device, and the other end of which is electrically connected to a line-finding signal input end of the main control chip 102;

[0094] A line search result output subcircuit 1042, wherein a control end of the line search result output subcircuit 1042 is electrically connected to a line search result output end of the main control chip 102;

[0095] The power supply sub-circuit 1043 has a power supply output terminal electrically connected to a power supply terminal of the main control chip 102 , and the power supply sub-circuit 1043 is used to supply power to the multifunctional cable maintenance device 10 .

[0096] It can be seen that this optional embodiment can integrate diversified functions into the line-finding receiving device, such as the crimping test function and / or the optical fiber fault detection function, thereby achieving the compatibility of the line-finding function with the crimping test function or the optical fiber fault detection function, enriching the functions of the line-finding receiving device, and helping to improve the convenience of using the line-finding receiving device by cable maintenance personnel.

[0097] In another optional embodiment, for the line-finding receiving device, the electronic components included in the main control chip 102, the connection relationship between the electronic components included therein, and the connection relationship between the included electronic components and other circuit structures are specifically referred to in Figure 6 , Figure 6 1 is a schematic diagram of the structure of a main control chip of a line-finding receiving device disclosed in an embodiment of the utility model; the electronic components included in the line-finding signal receiving subcircuit 1041, the connection relationship between the electronic components included therein, and the connection relationship between the electronic components included therein and other circuit structures are specifically referred to Figure 7 , Figure 7 1 is a schematic diagram of the structure of a line-finding signal receiving subcircuit of a line-finding receiving device disclosed in an embodiment of the utility model; the electronic components included in the line-finding result output subcircuit 1042, the connection relationship between the electronic components included therein, and the connection relationship between the electronic components included therein and other circuit structures are specifically referred to Figure 8 , Figure 8 1 is a schematic diagram of the structure of a line search result output subcircuit of a line search receiving device disclosed in an embodiment of the utility model; the electronic components included in the power supply subcircuit 1043, the connection relationship between the electronic components included therein, and the connection relationship between the electronic components included therein and other circuit structures are specifically referred to Fig. 9 , Fig. 9 The utility model is a schematic diagram of the structure of a power supply sub-circuit of a line-finding receiving device disclosed in an embodiment of the utility model.

[0098] It can be seen that the multifunctional cable maintenance device 10 described in the above embodiment can not only quickly and accurately realize crimping detection without switching modes or selecting functions, but also can start the crimping detection function after powering on and can also intuitively indicate the crimping detection results through indicator lights. In addition, the crimping detection function does not affect other functions of the multifunctional cable maintenance device 10. While expanding the functions of the multifunctional cable maintenance device 10, it improves the convenience and efficiency of crimping detection, thereby improving the convenience and efficiency of cable maintenance, and can also improve the user's experience of using the cable maintenance device. In addition, an optical fiber fault detection circuit is also integrated, and optical fiber fault detection can be realized without carrying a special optical fiber fault detection device, which is conducive to improving the efficiency and convenience of optical fiber fault detection.

[0099] The above is a detailed introduction to an optical fiber fault detection circuit and a multifunctional cable maintenance device disclosed in an embodiment of the utility model. The principle and implementation mode of the utility model are explained in this article using specific embodiments. However, the above preferred embodiments are not used to limit the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and the scope of application without departing from the spirit and scope of the utility model. Therefore, the scope of protection of the utility model shall be based on the scope defined in the claims.

Claims

1. An optical fiber fault detection circuit, characterized in that: The optical fiber fault detection circuit (101) is integrated in a multifunctional cable maintenance device (10), and the optical fiber fault detection circuit (101) comprises: Detection signal output subcircuit (1011); An optical fiber detection control subcircuit (1012), wherein a signal output end of the optical fiber detection control subcircuit (1012) is electrically connected to a signal input end of the detection signal output subcircuit (1011), an enabling end of the optical fiber detection control subcircuit (1012) is used to electrically connect to an optical fiber detection control end of a main control chip (102) in the multifunctional cable maintenance device (10), a grounding end of the optical fiber detection control subcircuit (1012) is used to be grounded, and a power supply end of the optical fiber detection control subcircuit (1012) is used to electrically connect to a power supply, and the power supply is used to supply power to the optical fiber fault detection circuit (101); The optical fiber detection control subcircuit (1012) is used to receive the optical fiber detection enable signal output by the main control chip (102), and output a control signal to the detection signal output subcircuit (1011) according to the optical fiber detection enable signal; the detection signal output subcircuit (1011) is used to output an optical fiber fault detection signal to the optical fiber to be detected for fault according to the control signal.

2. The optical fiber fault detection circuit according to claim 1, characterized in that: The optical fiber fault detection circuit (101) further comprises a feedback subcircuit (1013), wherein: One end of the feedback subcircuit (1013) is electrically connected to the feedback end of the detection signal output subcircuit (1011) and the detection end of the optical fiber detection control subcircuit (1012), and the other end of the feedback subcircuit (1013) is used for grounding; The feedback subcircuit (1013) is used to collect the working parameters corresponding to the detection signal output subcircuit (1011), and feed back the working parameters to the optical fiber detection control subcircuit (1012); Wherein, the operating parameters at least include an operating voltage and / or an operating current.

3. The optical fiber fault detection circuit according to claim 2, characterized in that: The optical fiber fault detection circuit (101) further comprises: a protection subcircuit (1014) corresponding to the detection signal output subcircuit (1011), wherein: One end of the protection subcircuit (1014) is electrically connected to the signal output end of the optical fiber detection control subcircuit (1012) and the signal input end of the detection signal output subcircuit (1011); The other end of the protection subcircuit (1014) is electrically connected to the feedback end of the detection signal output subcircuit (1011) and the detection end of the optical fiber detection control subcircuit (1012).

4. The optical fiber fault detection circuit according to claim 3, characterized in that: The protection subcircuit (1014) includes: a power-on protection subcircuit (10141) and / or a power-off protection subcircuit (10142).

5. The optical fiber fault detection circuit according to claim 4, characterized in that: The power-on protection subcircuit (10141) includes a capacitor C1.

6. The optical fiber fault detection circuit according to claim 4, characterized in that: The power-off protection subcircuit (10142) includes a diode D1; The anode of the diode D1 is electrically connected to the feedback end of the detection signal output subcircuit (1011) and the detection end of the optical fiber detection control subcircuit (1012). The cathode of the diode D1 is electrically connected to the signal output end of the optical fiber detection control subcircuit (1012) and the signal input end of the detection signal output subcircuit (1011).

7. The optical fiber fault detection circuit according to claim 2, characterized in that: The feedback subcircuit (1013) includes a resistor R1.

8. A multifunctional cable maintenance device, characterized in that: The multifunctional cable maintenance device (10) comprises at least the optical fiber fault detection circuit (101) as claimed in any one of claims 1 to 7 and a main control chip (102).

9. The multifunctional cable maintenance device according to claim 8, characterized in that: The multifunctional cable maintenance device (10) further comprises a crystal plug detection circuit (103), wherein the crystal plug detection circuit (103) comprises: A signal generating subcircuit (1031), wherein a control end of the signal generating subcircuit (1031) is electrically connected to a crimping control signal output end of the main control chip (102), and a crimping test channel of the signal generating subcircuit (1031) is electrically connected to a cable access port, and the cable access port is used for cable access; A signal conversion subcircuit (1032), wherein an input end of the signal conversion subcircuit (1032) is electrically connected to a signal output end of the signal generation subcircuit (1031), and an output end of the signal conversion subcircuit (1032) is electrically connected to a crimping detection signal input end of the main control chip (102).

10. The multifunctional cable maintenance device according to claim 8 or 9, characterized in that: The multifunctional cable maintenance device (10) is a line-finding receiving device, and the multifunctional cable maintenance device (10) further comprises a line-finding circuit (104), wherein the line-finding circuit (104) comprises: A line-finding signal receiving subcircuit (1041), one end of the line-finding signal receiving subcircuit (1041) is used to receive a line-finding signal sent by a matching line-finding transmitting device, and the other end of the line-finding signal receiving subcircuit (1041) is electrically connected to a line-finding signal input end of the main control chip (102); A line search result output subcircuit (1042), wherein a control end of the line search result output subcircuit (1042) is electrically connected to a line search result output end of the main control chip (102); A power supply subcircuit (1043), wherein a power supply output end of the power supply subcircuit (1043) is electrically connected to a power supply end of the main control chip (102), and the power supply subcircuit (1043) is used to supply power to the multifunctional cable maintenance device (10).

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