CN213544838U - Optical cable detection device - Google Patents
Optical cable detection device Download PDFInfo
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- CN213544838U CN213544838U CN202022957669.3U CN202022957669U CN213544838U CN 213544838 U CN213544838 U CN 213544838U CN 202022957669 U CN202022957669 U CN 202022957669U CN 213544838 U CN213544838 U CN 213544838U
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Abstract
The utility model discloses an optical cable detection device. The device includes: the vibration generator is arranged on the surface of soil and generates vibration, and the vibration generation time is sent to the optical cable vibration detector; the optical cable vibration detector receives the optical cable vibration signal, determines optical cable vibration starting time according to the optical cable vibration signal, obtains vibration time delay by subtracting the optical cable vibration starting time and vibration occurrence time, and determines the optical cable position according to the vibration time delay. Adopt the utility model discloses a device adopts the mode of surveying the vibration to carry out the optical cable and surveys, avoids because of the electromagnetic wave crosstalk or by the influence that near existence metal object of photometry cable brought, has improved the detection degree of accuracy.
Description
Technical Field
The utility model relates to an optical cable detection technology field especially relates to an optical cable detection device.
Background
When measuring the laying depth of the optical cable laid in the ground and the pipeline, an electromagnetic wave detection mode is adopted at present. One mode is that an electromagnetic signal is coupled to a metal core or a metal armor in the optical cable, then the electromagnetic signal is detected on the ground, and the trend of the optical cable is judged and the laying depth of the optical cable is measured according to the strength change condition of the received signal; the second mode is that electromagnetic signals are transmitted downwards on the ground, when the electromagnetic signals meet a metal core or metal armor in the optical cable in transmission, strong reflection is formed, the electromagnetic signals are reflected back to a receiver on the ground, and whether the optical cable exists under the ground or not and the laying depth of the optical cable is measured according to the received electromagnetic wave reflection signals.
When using electromagnetic waves to detect optical cables laid under the ground, because other metal pipelines, such as metal water pipes, power cables, and gas transmission pipelines, are often laid under the ground along with the optical cables, the presence of these metal objects makes it very difficult to detect the optical cables using electromagnetic waves. Therefore, when detecting an optical cable, how to detect the optical cable is not influenced by electromagnetic wave crosstalk or by the presence of metal objects near the optical cable to be detected, which is a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an optical cable detection device adopts the mode of surveying the vibration to carry out the optical cable and surveys, avoids because of the electromagnetic wave crosstalk or by the influence that near existence metal object of photometry cable brought, has improved the detection degree of accuracy.
In order to achieve the above object, the utility model provides a following scheme:
an optical cable detection device comprising:
an optical cable vibration detector and a vibration generator;
the optical cable vibration detector is wirelessly connected with the vibration generator;
the vibration generator is arranged on the surface of soil, and an optical cable is embedded in the soil; the vibration generator is used for generating vibration and sending the vibration generation time to the optical cable vibration detector;
the optical cable vibration detector is arranged at the first end of the optical cable and is connected with the optical fiber of the optical cable; the optical cable vibration detector is used for receiving an optical cable vibration signal, determining optical cable vibration starting time according to the optical cable vibration signal, subtracting the optical cable vibration starting time from the vibration occurrence time to obtain vibration time delay, and determining the position of the optical cable according to the vibration time delay.
Optionally, the optical cable detection apparatus further includes:
a fiber optic reflector;
the optical fiber reflector is arranged at the second end of the optical cable and is connected with the single optical fiber of the optical cable; the optical fiber reflector is used for reflecting the optical signal sent by the optical cable vibration detector.
Optionally, the optical cable vibration detector specifically includes:
the system comprises an optical cable vibration detection module, a processor and a first wireless transceiver;
the processor is respectively connected with the optical cable vibration detection module and the first wireless transceiver;
the optical cable vibration detection module is used for transmitting and receiving optical signals, and when the received optical signals contain optical cable vibration signals and the vibration intensity is greater than the vibration intensity threshold value, pulses are sent to the processor;
the processor is used for determining the vibration starting time of the optical cable when the pulse is received;
the first wireless transceiver is used for receiving the vibration generation time sent by the vibration generator and transmitting the vibration generation time to the processor; the processor is used for obtaining vibration time delay by making a difference between the vibration starting time of the optical cable and the vibration occurrence time, and determining the position of the optical cable according to the vibration time delay.
Optionally, the vibration generator specifically includes:
the vibration device, the vibration detection module and the second wireless transceiver;
the vibration detection module is arranged on the vibration device and is respectively and electrically connected with the vibration device and the second wireless transceiver;
the vibration detection module is used for recording the vibration occurrence time when the vibration device generates a vibration signal and transmitting the vibration occurrence time to the second wireless transceiver;
the second wireless transceiver is used for sending the vibration occurrence time to the first wireless transceiver.
Optionally, the vibration device specifically includes:
vibrating the block;
the vibrating block is used for generating a vibration signal when contacting a falling object.
Optionally, the vibration generator further includes:
a cable;
the vibration detection module and the second wireless transceiver are connected through the cable.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an optical cable detection device, which comprises an optical cable vibration detector and a vibration generator, wherein the vibration generator is arranged on the soil surface and generates vibration, and the vibration generator sends the vibration generation time to the optical cable vibration detector; the optical cable vibration detector receives the optical cable vibration signal, determines optical cable vibration starting time according to the optical cable vibration signal, obtains vibration time delay by subtracting the optical cable vibration starting time and vibration occurrence time, and determines the optical cable position according to the vibration time delay. The utility model discloses a mode of surveying the vibration carries out the optical cable and surveys, avoids because of electromagnetic wave crosstalk or by being surveyed near the influence that the optical cable exists the metal object and bring, has improved the detection degree of accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic diagram of a system composition of an optical cable detection device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the optical cable vibration detector according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the vibration generator according to an embodiment of the present invention;
fig. 4 is a schematic view of measuring the laying depth of the optical cable in the embodiment of the present invention;
fig. 5 is the embodiment of the utility model provides an optical cable lays the triangle geometry relation sketch map that the degree of depth calculated.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing an optical cable detection device adopts the mode of surveying the vibration to carry out the optical cable and surveys, avoids because of the electromagnetic wave crosstalk or by the influence that near existence metal object of photometry cable brought, has improved the detection degree of accuracy.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Examples
Fig. 1 is the embodiment of the utility model provides an optical cable detecting device's system composition schematic diagram, fig. 2 is the embodiment of the utility model provides an optical cable vibration detector constitutes the schematic diagram, fig. 3 is the embodiment of the utility model provides an embodiment vibration generator constitutes the schematic diagram, as shown in fig. 1-3, an optical cable detecting device, include: a fiber optic cable vibration detector and a vibration generator.
The optical cable vibration detector is wirelessly connected with the vibration generator; the vibration generator is arranged on the surface of soil, and an optical cable is embedded in the soil; the vibration generator is used for generating vibration and sending the vibration generation time to the optical cable vibration detector; the optical cable vibration detector is arranged at the first end of the optical cable and is connected with the optical fiber of the optical cable; the optical cable vibration detector is used for receiving optical cable vibration signals, determining optical cable vibration starting time according to the optical cable vibration signals, obtaining vibration time delay by subtracting the optical cable vibration starting time and vibration occurrence time, and determining the optical cable position according to the vibration time delay.
Optical cable detection device still includes: a fiber optic reflector; the optical fiber reflector is arranged at the second end of the optical cable and is connected with the single optical fiber of the optical cable; the optical fiber reflector is used for reflecting the optical signal sent by the optical cable vibration detector. The purpose of using a fiber optic reflector is to reflect the optical signal back along the incoming path so that a single fiber can be used for fiber optic cable vibration detection at a single end. The optical cable vibration detection can also be carried out by adopting double fibers at a single end, in this case, a fiber reflector is not needed, but two optical fibers are connected to form a loop at a far end. At one end of the tested optical cable, according to the working mode of the optical cable vibration detector, the optical cable vibration detector is connected to one or two optical fibers of the tested optical cable; connecting the corresponding optical fiber to an optical fiber reflector at the other end of the tested optical cable, or connecting two optical fibers to form a loop; the vibration generator is placed in a place where the laying depth of the optical cable needs to be measured, the optical cable vibration detector and the vibration generator are connected through a wireless communication link, and the vibration generator sends the vibration occurrence time to the optical cable vibration detector. The variation of the transmission delay of the wireless communication link is required to be less than 0.05 ms. The reflectivity value range of the optical fiber reflector is 0.01-1.
Optical cable vibration detector specifically includes: the system comprises a fiber optic cable vibration detection module, a processor and a first wireless transceiver (wireless transceiver 1). The processor is respectively connected with the optical cable vibration detection module and the first wireless transceiver; the optical cable vibration detection module is used for transmitting and receiving optical signals, and sending pulses to the processor when the received optical signals contain optical cable vibration signals and the vibration intensity is greater than the vibration intensity threshold value; the processor is used for determining the vibration starting time of the optical cable when the pulse is received; the first wireless transceiver is used for receiving the vibration generation time sent by the vibration generator and transmitting the vibration generation time to the processor; the processor is used for obtaining vibration time delay by making a difference between the vibration starting time of the optical cable and the vibration occurrence time, and determining the position of the optical cable according to the vibration time delay.
Vibration generator specifically includes: the device comprises a vibration device, a vibration detection module, a second wireless transceiver (a wireless transceiver 2) and a cable. The vibration detection module is arranged on the vibration device and is respectively and electrically connected with the vibration device and the second wireless transceiver; the vibration detection module is used for recording the vibration occurrence time when the vibration device generates the vibration signal and transmitting the vibration occurrence time to the second wireless transceiver; the second wireless transceiver is used for sending the vibration occurrence time to the first wireless transceiver. The vibration detection module is connected with the second wireless transceiver through a cable.
The vibration device includes a vibration block for generating a vibration signal when contacting a falling object (weight). The weight range is 1 kg-10 kg, and the material is metal or concrete; the vibrating block is a cylindrical body, the thickness range is 50 mm-200 mm, and the cross section area range is 0.09m2～1m2The material is concrete or hardwood; one side of the vibrating block is provided with a center point mark; the vibration detection module is fixed on the side of the vibrating block and is connected to the wireless transceiver 2 through a connecting cable. When the vibration generator generates vibration, the vibrating block is placed on the ground, the heavy hammer falls to the central point mark of the vibrating block from a selected height in a free-fall mode, and the heavy hammer impacts the vibrating block to generate a vibration signal; the vibration detection module detects the intensity and the occurrence time of a vibration signal and transmits the vibration signal to the remote wireless transceiver 1 through the wireless transceiver 2; the falling height of the heavy hammer ranges from 0.2m to 1 m.
The optical cable detection device further comprises a voice prompt device, wherein the voice prompt device is connected with the controller and used for carrying out voice prompt after the projection of the optical cable on the ground is obtained.
Fig. 4 is the embodiment of the utility model provides an in the embodiment of the measurement optical cable lays degree of depth sketch, fig. 5 is the embodiment of the utility model provides an in the embodiment of the optical cable lay deeplyAnd (4) a triangular geometrical relationship schematic diagram of degree calculation. In fig. 4 and 5, the vibration time delays obtained by the vibrations generated at vibration point 1, vibration point 2, and vibration point 3 are t1、t2、t3。
As shown in fig. 4-5, the specific operation process of the optical cable detection is as follows:
obtaining vibration time delay determined by an optical cable vibration detector after the vibration generator generates vibration at different positions; the vibration delay is the difference value between the vibration starting time of the optical cable and the vibration occurrence time, the vibration starting time of the optical cable is the time when the optical cable vibration detector receives the optical cable vibration signal, and the vibration occurrence time is the time when the vibration generator detects the vibration;
judging whether the difference value of the vibration time delays corresponding to two adjacent positions which are longer than the preset distance is smaller than the preset time delay or not, and obtaining a first judgment result;
if the first judgment result is yes, acquiring a vibration time delay set; all vibration time delays in the vibration time delay set are vibration time delays determined by the optical cable vibration detector after the vibration generator generates vibration at a plurality of positions in the vertical direction of a straight line formed by two adjacent positions;
and selecting the minimum vibration time delay in the vibration time delay set, and determining the position point of the vibration generator corresponding to the minimum vibration time delay as the projection of the optical cable on the ground.
Determining the projection of the optical cable on the ground as a first vibration point, and determining two position points selected in the vertical direction as a second vibration point and a third vibration point; the second vibration point is positioned between the first vibration point and the third vibration point, and the distance from the first vibration point to the second vibration point is equal to the distance from the second vibration point to the third vibration point;
obtaining the vibration time delay of the first vibration point, the vibration time delay of the second vibration point and the vibration time delay of the third vibration point;
according to the vibration time delay of the first vibration point, the vibration time delay of the second vibration point, the vibration time delay of the third vibration point and the distance from the first vibration point to the second vibration point, the optical cable laying depth is determined by adopting the following formula:
D2＝L2*(t2-t0)2/(t1-t0)2-L2
wherein the content of the first and second substances,
t0＝0.5*(t3 2-4t2 2+3t1 2)/(t3-4t2+3t1)
wherein D is the laying depth of the optical cable, L is the distance from the first vibration point to the second vibration point, and t1Is the vibration time delay of the first vibration point, t2Is the vibration time delay of the second vibration point, t3Is the vibration time delay of the third vibration point, t0Is an intermediate variable.
In particular, the method comprises the following steps of,
a) connecting a measuring system: according to the using mode of the optical cable vibration detector, the optical cable vibration detector is connected to one or two optical fibers of the optical cable to be detected at one end of the optical cable to be detected, and the corresponding used optical fibers are connected with an optical fiber reflector at the other end of the optical cable to be detected, or the two optical fibers are connected to form a loop.
b) Determining the projection of the measured cable on the ground at the measurement site: placing a vibration generator at a place where the optical cable is possibly laid to generate vibration; if the optical cable vibration detector at the far end does not detect the corresponding optical cable vibration, the position of the vibration generator is changed until the optical cable vibration detector detects the corresponding optical cable vibration; if the optical cable vibration detector at the far end detects the corresponding optical cable vibration, measuring the vibration time delay t; changing the position of a vibration generator every 0.1-0.5 m along a certain linear direction, and measuring the vibration time delay t at the same time, wherein if the vibration time delay t change measured at two positions with the interval of more than 1m is less than 0.2ms, the linear direction is considered to be approximately parallel to the trend of the tested cable, and the linear direction of movement needs to be changed; and recording the central mark position of the vibrating block at the vibrating point of the minimum value of the vibration time delay t, and considering that the tested cable is positioned vertically below the ground at the position, namely the central point of the vibrating block is a projection point of the tested cable on the ground.
c) Selecting a vibration point: and 3 vibration points, such as vibration points 1, 2 and 3 in fig. 4, are selected, and are on a straight line, the straight line is perpendicular to the trend of the optical cable, wherein the vibration point 1 is located on the projection of the measured optical cable on the ground, the vibration point interval is L, the value range of L is 0.5 m-2 m, and L is preferably equal to 1 m.
d) The vibration generator generates vibration at three vibration points respectively and obtains corresponding vibration time delay t1、t2、t3。
e) Calculating the cable laying depth D, D and L, t according to the triangular geometrical relationship shown in FIG. 51、t2、t3The relationship of (1) is:
D2＝L2*(t2-t0)2/(t1-t0)2-L2，
wherein t is0＝0.5*(t3 2-4t2 2+3t1 2)/(t3-4t2+3t1)。
In the above measurement steps, the vibration time delay of three point vibration points needs to be measured in total, so that the propagation speed of the vibration in the soil does not need to be involved in the calculation of the optical cable laying depth D. The interval values of the vibration points are the same, and the calculation relation for deducing the laying depth D of the optical cable can be simplified.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present description should not be construed as a limitation of the present invention.
Claims (6)
1. An optical cable detection device, comprising:
an optical cable vibration detector and a vibration generator;
the optical cable vibration detector is wirelessly connected with the vibration generator;
the vibration generator is arranged on the surface of soil, and an optical cable is embedded in the soil; the vibration generator is used for generating vibration and sending the vibration generation time to the optical cable vibration detector;
the optical cable vibration detector is arranged at the first end of the optical cable and is connected with the optical fiber of the optical cable; the optical cable vibration detector is used for receiving an optical cable vibration signal, determining optical cable vibration starting time according to the optical cable vibration signal, subtracting the optical cable vibration starting time from the vibration occurrence time to obtain vibration time delay, and determining the position of the optical cable according to the vibration time delay.
2. The fiber optic cable detection apparatus of claim 1, further comprising:
a fiber optic reflector;
the optical fiber reflector is arranged at the second end of the optical cable and is connected with the single optical fiber of the optical cable; the optical fiber reflector is used for reflecting the optical signal sent by the optical cable vibration detector.
3. The optical cable detection device according to claim 1, wherein the optical cable vibration detector specifically comprises:
the system comprises an optical cable vibration detection module, a processor and a first wireless transceiver;
the processor is respectively connected with the optical cable vibration detection module and the first wireless transceiver;
the optical cable vibration detection module is used for transmitting and receiving optical signals, and when the received optical signals contain optical cable vibration signals and the vibration intensity is greater than the vibration intensity threshold value, pulses are sent to the processor;
the processor is used for determining the vibration starting time of the optical cable when the pulse is received;
the first wireless transceiver is used for receiving the vibration generation time sent by the vibration generator and transmitting the vibration generation time to the processor; the processor is used for obtaining vibration time delay by making a difference between the vibration starting time of the optical cable and the vibration occurrence time, and determining the position of the optical cable according to the vibration time delay.
4. The optical cable detection device according to claim 3, wherein the vibration generator specifically comprises:
the vibration device, the vibration detection module and the second wireless transceiver;
the vibration detection module is arranged on the vibration device and is respectively and electrically connected with the vibration device and the second wireless transceiver;
the vibration detection module is used for recording the vibration occurrence time when the vibration device generates a vibration signal and transmitting the vibration occurrence time to the second wireless transceiver;
the second wireless transceiver is used for sending the vibration occurrence time to the first wireless transceiver.
5. The optical cable detection device according to claim 4, wherein the vibration device specifically comprises:
vibrating the block;
the vibrating block is used for generating a vibration signal when contacting a falling object.
6. The optical cable detection device of claim 5, wherein the vibration generator further comprises:
a cable;
the vibration detection module and the second wireless transceiver are connected through the cable.
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| CN202022957669.3U CN213544838U (en) | 2020-12-09 | 2020-12-09 | Optical cable detection device |
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| CN202022957669.3U CN213544838U (en) | 2020-12-09 | 2020-12-09 | Optical cable detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325836A (en) * | 2021-12-31 | 2022-04-12 | 安徽陶博士环保科技有限公司 | Submarine optical cable and photoelectric composite cable tracing method and device |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325836A (en) * | 2021-12-31 | 2022-04-12 | 安徽陶博士环保科技有限公司 | Submarine optical cable and photoelectric composite cable tracing method and device |
| CN114325836B (en) * | 2021-12-31 | 2022-11-22 | 安徽陶博士环保科技有限公司 | Method and device for tracing submarine optical cable and photoelectric composite cable |
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