CN111679227A - Coaxial cable channel state detection circuit and method - Google Patents
Coaxial cable channel state detection circuit and method Download PDFInfo
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- CN111679227A CN111679227A CN202010560700.1A CN202010560700A CN111679227A CN 111679227 A CN111679227 A CN 111679227A CN 202010560700 A CN202010560700 A CN 202010560700A CN 111679227 A CN111679227 A CN 111679227A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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Abstract
The invention discloses a detection circuit and a method for the channel state of a coaxial cable, which can comprise at least one detection sub-circuit, wherein each detection sub-circuit can comprise: and one end of the indicator light can be electrically connected with the central conductor of the coaxial cable, and the other end of the indicator light can be electrically connected with the shielding layer of the coaxial cable. The invention can detect the channel state of the coaxial cable by observing whether the indicator light emits light or not. The detection circuit provided by the embodiment can judge whether the coaxial cable breaks down, has high detection stability and reliability, is simple to operate and convenient to carry, and can realize real-time monitoring and daily operation and maintenance monitoring of the channel state of the coaxial cable.
Description
Technical Field
The invention relates to the technical field of coaxial cables, in particular to a circuit and a method for detecting the channel state of a coaxial cable.
Background
The coaxial cable is a cable which can be used for signal transmission (including analog signals and digital signals), has stronger anti-interference capability, shielding performance and stable data transmission performance, and can be widely applied to numerous fields such as cable televisions, long distance telephones, computer systems and the like.
The coaxial cable may include both open and closed channel states. The channel state of the coaxial cable can reflect the operation condition of the channel of the relay protection device of the power system, so that the effective monitoring of the channel state of the coaxial cable is very important.
However, the method for monitoring the channel state of the coaxial cable adopted by the prior art is complex and tedious.
Disclosure of Invention
In view of the above problems, the present invention provides a coaxial cable channel status detection circuit and method, which overcomes or at least partially solves the above problems, and the technical solution is as follows:
a coaxial cable channel condition detection circuit, said detection circuit comprising at least one detection subcircuit, each said detection subcircuit comprising: an indicator light;
one end of the indicator light in each detection sub-circuit is electrically connected with the central conductor of the coaxial cable, and the other end of the indicator light in each detection sub-circuit is electrically connected with the shielding layer of the coaxial cable; the shielding layer of the coaxial cable is grounded.
Optionally, each of the detection sub-circuits further includes: a switch;
in any of the detection subcircuits: one end of the switch in the detection sub-circuit is electrically connected with the central conductor of the coaxial cable, the other end of the switch in the detection sub-circuit is electrically connected with one end of the indicator light in the detection sub-circuit, and the other end of the indicator light in the detection sub-circuit is electrically connected with the shielding layer of the coaxial cable.
Optionally, each of the detection sub-circuits is uniformly arranged in a circumferential direction in one cross section of the coaxial cable.
Optionally, the detection circuit further includes: a low pass filter sub-circuit.
Optionally, one end of the low-pass filter sub-circuit is electrically connected to the central conductor of the coaxial cable, and the other end of the low-pass filter sub-circuit is electrically connected to the shielding layer of the coaxial cable.
Optionally, the indicator light in each detection sub-circuit is a light emitting diode.
Optionally, one end of the indicator light in each detection sub-circuit is electrically connected to the central conductor of the coaxial cable through the internal and external thread interfaces, and the other end of the indicator light in each detection sub-circuit is electrically connected to the shielding layer of the coaxial cable through the internal and external thread interfaces.
Optionally, the detection circuit further includes: and the temperature alarm is arranged around each indicator light.
Optionally, the detection circuit further includes: a light sensor and a controller;
the light sensor is arranged around each indicator light;
the light sensor is in communication with the controller.
A method for detecting a coaxial cable channel state, applied to the coaxial cable channel state detection circuit of claim 9, the method comprising:
the controller determines whether a target current signal sent by the light sensor is received, wherein the target current signal is a current signal generated by the light sensor when the light sensor measures light emitted by any indicator lamp;
if so, the controller determines that the coaxial cable is in a connected state,
otherwise, the controller determines that the coaxial cable is in a disconnected state.
The detection circuit and method for the coaxial cable channel state provided by the invention can comprise at least one detection sub-circuit, and each detection sub-circuit can comprise: and one end of the indicator light can be electrically connected with the central conductor of the coaxial cable, and the other end of the indicator light can be electrically connected with the shielding layer of the coaxial cable.
The invention can judge the fault state of the coaxial cable in time and simply by observing the state of the indicator lamp in the coaxial cable so as to process the fault state of the coaxial cable in time;
according to the invention, the direct detection of the channel state of the coaxial cable can be realized only by connecting the detection circuit between the central conductor and the shielding layer of the coaxial cable, so that the operation is simple and the carrying is convenient; the coaxial cable can be connected between the central conductor and the shielding layer of the coaxial cable without being detached after connection, so that the real-time monitoring and daily operation and maintenance monitoring of the channel state of the coaxial cable are realized;
the redundant indicator lamps arranged in the detection circuit can judge the channel state of the coaxial cable according to the light emitting condition of other indicator lamps when one or more indicator lamps fail to emit light due to self damage and the like, thereby avoiding misjudgment of the channel state of the coaxial cable and effectively improving the stability and reliability of the detection circuit.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a circuit diagram of a coaxial cable channel status detection circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a coaxial cable according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram illustrating various detection sub-circuits uniformly arranged along the circumferential direction in a cross section of a coaxial cable according to an embodiment of the present invention;
fig. 4 is a circuit diagram of another coaxial cable channel status detection circuit provided by an embodiment of the present invention;
fig. 5 is a circuit diagram of another coaxial cable channel status detection circuit provided by an embodiment of the present invention;
fig. 6 is a flowchart illustrating a method for detecting a coaxial cable channel status according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, the present embodiment provides a detection circuit for detecting a coaxial cable channel status, where the detection circuit may include at least one detection sub-circuit, and each detection sub-circuit may include: an indicator light 110;
one end of the indicator light 110 in each detection sub-circuit is electrically connected with the central conductor of the coaxial cable, and the other end of the indicator light 110 in each detection sub-circuit is electrically connected with the shielding layer of the coaxial cable; the shielding layer of the coaxial cable is grounded.
It should be noted that the coaxial cable can be divided into four layers, which are sequentially from inside to outside: center conductor, insulating layer, shielding layer and restrictive coating.
The central conductor may be a copper wire, the insulating layer may be plastic, the shielding layer may be a metal shielding layer, and the sheath layer may be an insulating layer rubber, that is, the coaxial cable may sequentially include four-layer structure including a copper core inner conductor 101, a plastic insulating medium 102, a metal shielding layer 103, and an insulating layer rubber 104 from inside to outside, as shown in fig. 2.
The metal shielding layer 103 may be a cylindrical mesh copper conductor wrapped on the inner and outer surfaces of the copper core.
It should be noted that the present invention is not limited to the specific type of coaxial cable, as the coaxial cable may be a baseband coaxial cable or a broadband coaxial cable.
Of course, the present invention is not limited to specific values of the parameters such as the electrical parameters and the dimensional parameters of the coaxial cable.
It should also be noted that the coaxial cable may transmit a current signal. The skilled person tests show that when the coaxial cable is in the connected state, a certain voltage value (for example, a voltage value between 1.5 volts and 2.0 volts) exists between the central conductor and the shielding layer, and when the coaxial cable is in the disconnected state, the voltage value between the central conductor and the shielding layer is reduced to a smaller value, even to zero. The invention can judge the channel state of the coaxial cable by detecting the voltage value.
Specifically, the detection sub-circuit is disposed between the central conductor and the shielding layer (i.e., between the insulating layers) of the coaxial cable, and after the indicator lamp 110 is disposed in the detection sub-circuit, the voltage value between the central conductor and the shielding layer of the coaxial cable can be detected by whether the indicator lamp 110 emits light, so as to detect the channel state of the coaxial cable.
When the indicator light 110 emits light, the voltage value between the central conductor and the shielding layer of the coaxial cable can be determined to reach a certain value, and then the coaxial cable is determined to be in a communication state;
when the indicator light 110 does not emit light, the present invention can determine that the voltage value between the central conductor and the shielding layer of the coaxial cable does not reach a certain value, and further determine that the coaxial cable is in a disconnected state.
The indicator light 110 may be a light emitting diode. The light emitting diode may emit light at a voltage value between 1.5 volts and 2.0 volts.
It is understood that when the indicator light 110 in the present embodiment emits light, the light emitted from the indicator light 110 can penetrate through the coaxial cable, so that the technician can observe the status of the indicator light 110 in the coaxial cable.
Optionally, the detection circuit may further include: a light sensor and a controller. Light sensors may be disposed about each indicator light 110, the light sensors being communicatively coupled to the controller.
Specifically, the light sensor may be located around each indicator light 110 and inside the coaxial cable, or may be located around each indicator light 110 and outside the coaxial cable.
Wherein the present invention can measure the light emitted from the indicator lamp 110 by the light sensor.
It is understood that, in order to avoid the influence of the ambient light on the light sensor, the indicator light 110 in the present embodiment may be an indicator light 110 capable of emitting light with a certain fixed characteristic, such as purple light. And the light sensor can generate a certain type of current signal when receiving the light with the characteristics. The present invention can determine whether any indicator light 110 is illuminated based on whether the light sensor is generating such a current model.
If the optical sensor is located around each indicator light 110 and inside the coaxial cable, the optical sensor can receive the light emitted by each indicator light 110 to generate a certain current signal and send the current signal to the controller;
if the optical sensor is located around each indicator light 110 and outside the coaxial cable, the optical sensor can receive the light emitted by each indicator light 110 and penetrating through the coaxial cable to generate a certain current signal, and send the current signal to the controller;
specifically, the present invention may also determine that the light sensor generates the target current signal when the controller receives the current signal, that is, at least one indicator light 110 in the coaxial cable is in a light-emitting state, so as to determine that the coaxial cable is in a connected state.
It is understood that, if the controller does not receive the current signal, the present invention can determine that the light sensor does not generate the target current signal, i.e., each indicator light 110 in the coaxial cable is not in the light-emitting state, so that it can determine that the coaxial cable is in the disconnected state.
It is understood that if the light sensor is disposed at a position around each indicator lamp 110 and outside the coaxial cable, the light sensor can perform measurement of light emitted from the indicator lamp 110 without contact with the coaxial cable. In this case, the present invention can realize non-contact detection of the coaxial cable channel state by the optical sensor and the controller.
Specifically, the controller can be in communication connection with the display screen of the monitoring room, and the determined channel state of the coaxial cable is sent to the display screen of the monitoring room, so that the channel state of the coaxial cable can be displayed to the outside on the display screen.
It should be noted that when the coaxial cable is to be connected and actually disconnected, the coaxial cable may have a fault, such as a break in the center conductor of the coaxial cable. At this time, the present invention can determine that the coaxial cable is in the fault state by that when none of the indicator lights 110 in the coaxial cable is in the non-lighting state, so as to timely process the fault state of the coaxial cable.
It can be understood that, in order to avoid the misjudgment of the coaxial cable channel state caused by the damage of the single indicator light 110 (for example, when the coaxial cable is in the normal connection state, and the indicator light 110 does not emit light due to the damage of the indicator light itself, the present invention may make the misjudgment that the coaxial cable is in the disconnection state due to the fact that the indicator light 110 does not emit light by the measurement), the present invention may provide a plurality of detection sub-circuits between the central conductor and the shielding layer of the coaxial cable, that is, may provide a redundant detection sub-circuit, and a redundant indicator light 110.
Specifically, the present invention can determine that the coaxial cable is in a connected state when it is detected that the indicator lamp 110 emits light in the detection circuit;
specifically, the present invention can determine that the coaxial cable is in the disconnected state when no light is emitted from the indicator lamp 110 in the detection circuit.
Specifically, the redundant detection sub-circuit provided by the invention can judge the channel state of the coaxial cable by the light-emitting condition of other indicator lamps 110 when one or more indicator lamps 110 fail to emit light due to self damage and the like, thereby avoiding misjudgment of the channel state of the coaxial cable and effectively improving the stability and reliability of the detection circuit.
The plurality of indicator lights 110 are arranged, and when the coaxial cable is in a connected state, light with higher brightness is emitted outwards integrally, so that the light sensor is favorable for collecting light energy emitted by the indicator lights 110, and technicians are favorable for observing the state of the indicator lights 110.
It should be further noted that, in the prior art, the channel state of the coaxial cable is indirectly detected mainly by detecting the attenuation loss of the channel through the optical power, the process involves the conversion between the electrical signal and the optical signal, the detection can be performed after the optical fiber interface is detached every time, and the operation is complicated and complicated.
The detection circuit provided by the invention can realize direct detection of the channel state of the coaxial cable only by connecting the central conductor of the coaxial cable with the shielding layer, and has the advantages of simple operation and convenient carrying; and the coaxial cable can be connected between the central conductor and the shielding layer of the coaxial cable without being detached after being connected in the coaxial cable, so that the real-time monitoring and the daily operation and maintenance monitoring of the channel state of the coaxial cable can be realized.
Alternatively, the detection sub-circuits may be arranged uniformly in the circumferential direction in one cross section of the coaxial cable. Fig. 3 is a schematic structural diagram of various detection sub-circuits provided in this embodiment, which are uniformly arranged in a circumferential direction in a cross section of a coaxial cable.
In fig. 3, the detection circuit is provided with eight detection sub-circuits, each provided with one indicator light 110, which are arranged in the same cross section of the coaxial cable, and which are evenly arranged circumferentially along the cross section; of course, the indicator lights 110 are all arranged in the cross section of the insulating layer 112 of the coaxial cable, and one end of each indicator light 110 is electrically connected with the central conductor 111 of the coaxial cable, and the other end of each indicator light 110 is electrically connected with the shielding layer 113 of the coaxial cable.
It is understood that when the detection sub-circuits are uniformly arranged in the circumferential direction in one cross section of the coaxial cable, the indicator lights 110 may be uniformly distributed in the circumferential direction in the cross section. At this time, when each indicator light 110 emits light, the brightness of the light can be uniformly distributed, and the heat generated by the light emission of the indicator light 110 can be prevented from being too concentrated, so that the coaxial cable is prevented from being damaged due to the temperature overrun.
Optionally, the detection circuit may further include: a temperature alarm, which may be disposed around each indicator light 110.
Specifically, the present invention can arrange the temperature sensor portion of a temperature alarm device of a suitable size at a position around each indicator light 110 and inside the coaxial cable according to the size parameter of the coaxial cable, so as to monitor the temperature of the coaxial cable at the part around the detection circuit.
Of course, the present invention may monitor the temperature of the coaxial cable in the portion around the detection circuit by disposing the temperature sensor portion around each indicator lamp 110 at a position outside the coaxial cable.
It should be noted that the specific location of the temperature alarm in the coaxial cable is not limited in the present invention.
Specifically, when the temperature exceeds the limit value, the invention can alarm to the outside through the temperature alarm, so as to avoid that the temperature of a certain position of the coaxial cable exceeds the limit value and damages the coaxial cable due to the light emitting and the heat emitting of the indicator lamp 110 of each detection sub-circuit.
Specifically, the temperature alarm can be connected with a monitoring screen of a monitoring room. When the temperature exceeds the limit value, the temperature alarm can be controlled to output the temperature alarm signal to the display screen of the monitoring room, so that the temperature alarm information can be displayed to the outside on the display screen.
Of course, the temperature alarm can be used for detecting the temperature of the coaxial cable when needed, and the temperature alarm does not need to be used for continuously monitoring the temperature of the coaxial cable. For example, the invention can periodically use a temperature alarm to detect the temperature of the coaxial cable.
Optionally, one end of the indicator light 110 in each detection sub-circuit is electrically connected to the central conductor of the coaxial cable through the internal and external threaded interfaces, and the other end of the indicator light 110 in each detection sub-circuit is electrically connected to the shielding layer of the coaxial cable through the internal and external threaded interfaces.
Specifically, the indicator lamp 110 is electrically connected with the central conductor through the internal and external thread threaded interfaces, and when the indicator lamp 110 is electrically connected with the shielding layer, the stability of the detection circuit installed in the coaxial cable is facilitated, the detection circuit is prevented from falling off or separating from the original installation position, and the detection circuit is convenient to disassemble.
It can be understood that when the coaxial cable is used in the power system relay protection device channel for data transmission, the invention can provide an effective and convenient scheme for detecting the operation condition of the power system relay protection device channel on site by monitoring the channel state of the coaxial cable in real time.
The detection circuit for the coaxial cable channel status proposed in this embodiment may include at least one detection sub-circuit, and each detection sub-circuit may include: and an indicator lamp 110, wherein one end of the indicator lamp 110 may be electrically connected to the central conductor of the coaxial cable, and the other end of the indicator lamp 110 may be electrically connected to the shielding layer of the coaxial cable, so that the channel state of the coaxial cable may be detected by observing whether the indicator lamp 110 emits light. The detection circuit provided by the embodiment can judge whether the coaxial cable breaks down, has high detection stability and reliability, is simple to operate and convenient to carry, and can realize real-time monitoring and daily operation and maintenance monitoring of the channel state of the coaxial cable.
Based on the detection circuit shown in fig. 1, the present embodiment provides another detection circuit for detecting a coaxial cable channel state, as shown in fig. 4, in the detection circuit, each detection sub-circuit may further include: a switch 200.
In any of the detection sub-circuits: one end of the switch 200 in the detection sub-circuit is electrically connected to the center conductor of the coaxial cable, the other end of the switch 200 in the detection sub-circuit is electrically connected to one end of the indicator lamp 110 in the detection sub-circuit, and the other end of the indicator lamp 110 in the detection sub-circuit is electrically connected to the shielding layer of the coaxial cable.
Specifically, after the switch 200 is disposed in the detection sub-circuit, the use of the detection sub-circuit can be controlled by the closing and opening of the switch 200.
When the channel state of the coaxial cable needs to be detected by using the detection sub-circuit, the switch 200 in the detection sub-circuit can be closed;
when the channel state of the coaxial cable is detected without using the detection sub-circuit, the switch 200 in the detection sub-circuit can be turned off, so as to reduce the consumption of the indicator lamp 110 and prolong the service life of the indicator lamp 110.
In the coaxial cable channel state detection circuit provided in this embodiment, the switch 200 is disposed in each detection sub-circuit, so that flexibility in controlling the detection sub-circuits can be increased.
Based on the detection circuit shown in fig. 1, the present embodiment provides another detection circuit for detecting the channel state of a coaxial cable, as shown in fig. 5, the detection circuit may further include: a low pass filter sub-circuit.
It should be noted that, in an operating environment of a relay protection device of a power system, a high-frequency signal may be a main interference source.
Specifically, in the working environment of the relay protection device of the power system, after the detection sub-circuit is connected to the coaxial cable, in order to avoid the interference of the high-frequency signal to the current signal transmitted by the coaxial cable through the detection sub-circuit as much as possible, the detection circuit may be provided with a low-pass filtering sub-circuit.
Specifically, one end of the low-pass filter sub-circuit may be electrically connected to the center conductor of the coaxial cable, and the other end of the low-pass filter sub-circuit may be electrically connected to the shielding layer of the coaxial cable.
The low-pass filter sub-circuit in this embodiment can block the high-frequency signal flowing into the coaxial cable through the detection sub-circuit, and effectively prevents the high-frequency signal from interfering with the current signal transmitted by the coaxial cable through the detection sub-circuit.
It should be noted that the specific circuit structure of the low-pass filter sub-circuit is not limited in the present invention. For example, the low-pass filter sub-circuit in this embodiment may be a passive filter circuit or an active filter circuit.
When the low-pass filtering sub-circuit in this embodiment is a passive filtering circuit, the low-pass filtering sub-circuit may be specifically an inverted-L filtering circuit, an LC pi-type filtering circuit, or an RC pi-type filtering circuit.
It is understood that, in other embodiments, the present invention may be combined with fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5 to provide another coaxial cable channel status detection circuit, where the detection circuit may include at least one detection sub-circuit, and each detection sub-circuit in the detection circuit may include: the indicator light 110 and the switch 200, the detection sub-circuits may be uniformly arranged along the circumference in one section of the coaxial cable, and the detection circuit may further include a low-pass filter sub-circuit, a temperature alarm, a light sensor and a controller.
In the detection circuit for the channel state of the coaxial cable provided by this embodiment, the low-pass filter sub-circuit is disposed in the detection circuit, so that interference of a high-frequency signal to a current signal transmitted by the coaxial cable through the detection sub-circuit can be prevented as much as possible.
Based on the above-mentioned detection circuit for detecting the coaxial cable channel status including the optical sensor and the controller, the present embodiment proposes a method for detecting the coaxial cable channel status, as shown in fig. 6, the method may include the following steps:
s10, the controller determines whether a target current signal sent by the light sensor is received, wherein the target current signal is a current signal generated when the light sensor measures light emitted by any indicator lamp; if so, go to step S21; otherwise, step S22 is executed.
Specifically, the light sensor may be located around each indicator light and at a position inside the coaxial cable, or may be located around each indicator light and at a position outside the coaxial cable.
The invention can measure the light emitted by the indicator lamp through the light sensor.
It will be appreciated that to avoid the influence of ambient light on the light sensor, the indicator light in this embodiment may be an indicator light that emits light with a certain fixed characteristic, such as a purple light. And the light sensor can correspondingly generate a corresponding type of target current signal when receiving the light with the characteristics. The invention can determine whether the indicator lamp is in the lighting state according to whether the optical sensor generates the target current signal.
If the optical sensor is positioned around each indicator light and at the position inside the coaxial cable, the optical sensor can receive the light emitted by each indicator light to generate a target current signal and send the target current signal to the controller;
if the optical sensor is located around each indicator light and outside the coaxial cable, the optical sensor can receive light emitted by each indicator light and penetrating through the coaxial cable to generate a target current signal, and the target current signal is sent to the controller.
S21, the controller determines that the coaxial cable is in a communication state;
specifically, the present invention can determine that the optical sensor generates the target current signal when the controller receives the target current signal, that is, at least one indicator lamp in the coaxial cable is in a light-emitting state, so that it can be determined that the coaxial cable is in a connected state.
S22, the controller determines that the coaxial cable is in a disconnected state.
It can be understood that, when the controller does not receive the target current signal, the present invention may determine that the light sensor does not generate the target current signal, that is, none of the indicator lights in the coaxial cable is in the light-emitting state, so that it may determine that the coaxial cable is in the disconnected state.
It will be appreciated that if the light sensor is disposed at a position around each indicator light and outside the coaxial cable, the light sensor can perform a measurement of the light emitted from the indicator light without contacting the coaxial cable. In this case, the present invention can realize non-contact detection of the coaxial cable channel state by the optical sensor and the controller.
Specifically, the controller can be in communication connection with the display screen of the monitoring room, and the determined channel state of the coaxial cable is sent to the display screen of the monitoring room, so that the channel state of the coaxial cable can be displayed to the outside on the display screen.
It should be noted that, in the prior art, the channel state of the coaxial cable is indirectly detected mainly by detecting the attenuation loss of the channel through the optical power, the process involves the conversion between the electrical signal and the optical signal, the detection can be performed after the optical fiber interface is detached every time, and the operation is complicated and complicated.
The invention can realize the direct detection of the channel state of the coaxial cable only by connecting the detection circuit with the coaxial cable, and has simple operation and convenient carrying; and the coaxial cable is connected without being detached, so that the real-time monitoring and daily operation and maintenance monitoring of the coaxial cable channel state are realized.
The method for detecting the coaxial cable channel state provided by the embodiment can judge whether the coaxial cable has a fault, the detection circuit has high detection stability and reliability, is simple to operate and convenient to carry, and can realize real-time monitoring and daily operation and maintenance monitoring of the coaxial cable channel state.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A coaxial cable channel condition detection circuit, said detection circuit comprising at least one detection sub-circuit, each said detection sub-circuit comprising: an indicator light;
one end of the indicator light in each detection sub-circuit is electrically connected with the central conductor of the coaxial cable, and the other end of the indicator light in each detection sub-circuit is electrically connected with the shielding layer of the coaxial cable; the shielding layer of the coaxial cable is grounded.
2. The detection circuit of claim 1, wherein each of the detection sub-circuits further comprises: a switch;
in any of the detection subcircuits: one end of the switch in the detection sub-circuit is electrically connected with the central conductor of the coaxial cable, the other end of the switch in the detection sub-circuit is electrically connected with one end of the indicator light in the detection sub-circuit, and the other end of the indicator light in the detection sub-circuit is electrically connected with the shielding layer of the coaxial cable.
3. The detection circuit of claim 1, wherein each of the detection sub-circuits is uniformly arranged in a circumferential direction in one cross-section of the coaxial cable.
4. The detection circuit of claim 1, further comprising: a low pass filter sub-circuit.
5. The detection circuit of claim 4, wherein one end of the low pass filter subcircuit is electrically connected to the center conductor of the coaxial cable and the other end of the low pass filter subcircuit is electrically connected to the shielding layer of the coaxial cable.
6. The detection circuit of claim 1, wherein the indicator light in each detection sub-circuit is a light emitting diode.
7. The detection circuit according to claim 1, wherein one end of the indicator light in each detection sub-circuit is electrically connected to the central conductor of the coaxial cable through an internal and external threaded interface, and the other end of the indicator light in each detection sub-circuit is electrically connected to the shielding layer of the coaxial cable through an internal and external threaded interface.
8. The detection circuit of claim 1, further comprising: and the temperature alarm is arranged around each indicator light.
9. The detection circuit of claim 1, further comprising: a light sensor and a controller;
the light sensor is arranged around each indicator light;
the light sensor is in communication with the controller.
10. A method for detecting a coaxial cable channel state, which is applied to the coaxial cable channel state detection circuit according to claim 9, the method comprising:
the controller determines whether a target current signal sent by the light sensor is received, wherein the target current signal is a current signal generated by the light sensor when the light sensor measures light emitted by any indicator lamp;
if so, the controller determines that the coaxial cable is in a connected state,
otherwise, the controller determines that the coaxial cable is in a disconnected state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560700.1A CN111679227A (en) | 2020-06-18 | 2020-06-18 | Coaxial cable channel state detection circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560700.1A CN111679227A (en) | 2020-06-18 | 2020-06-18 | Coaxial cable channel state detection circuit and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111679227A true CN111679227A (en) | 2020-09-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113325335A (en) * | 2021-08-04 | 2021-08-31 | 南昌龙旗信息技术有限公司 | Circuit failure detection circuit and method and intelligent electronic equipment |
| CN113391098A (en) * | 2021-06-15 | 2021-09-14 | 贵州电网有限责任公司 | Optical difference protection coaxial cable channel control device and control method thereof |
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| CN203117268U (en) * | 2013-03-20 | 2013-08-07 | 陕西赛普瑞电气有限公司 | Power cable multi-working-condition on-line detection system |
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| CN113391098A (en) * | 2021-06-15 | 2021-09-14 | 贵州电网有限责任公司 | Optical difference protection coaxial cable channel control device and control method thereof |
| CN113391098B (en) * | 2021-06-15 | 2023-04-07 | 贵州电网有限责任公司 | Optical difference protection coaxial cable channel control device and control method thereof |
| CN113325335A (en) * | 2021-08-04 | 2021-08-31 | 南昌龙旗信息技术有限公司 | Circuit failure detection circuit and method and intelligent electronic equipment |
| CN113325335B (en) * | 2021-08-04 | 2021-11-23 | 南昌龙旗信息技术有限公司 | Circuit failure detection circuit and method and intelligent electronic equipment |
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Application publication date: 20200918 |
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