Device and method for measuring optical cable laying depth

Abstract

The present invention discloses a device and method for measuring the laying depth of an optical cable, the measuring device comprising: an optical cable vibration detection module, a vibration generating device and a wireless terminal; the vibration generating device is arranged at a position to be measured, and the vibration generating device is used to apply vibration at the position to be measured as a vibration source; the input end of the optical cable vibration detection module is connected to one end of the optical cable to be measured, and the output end of the optical cable vibration detection module is connected to the wireless terminal in a wireless manner; the optical cable vibration detection module is used to obtain the relative value of the vibration intensity of the optical cable to be measured under the action of the vibration source, and send the relative value of the vibration intensity to the wireless terminal; the wireless terminal is used to store and display the relative value of the vibration intensity. The present invention determines the laying depth of the optical cable based on the propagation attenuation law of the point vibration source through the measured relative value of the vibration intensity, thereby avoiding the interference of metal cables other than the optical cable and improving the accuracy of measuring the laying depth of the optical cable.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering measurement, and in particular to a device and method for measuring the laying depth of an optical cable. Background Art

[0002] Electromagnetic wave detection is currently used to measure the laying depth of buried and pipeline optical cables. One method is to couple electromagnetic signals to the metal core or metal armor in the optical cable, and then detect the electromagnetic wave signal on the ground, and judge the direction of the optical cable and measure the laying depth of the optical cable according to the changes in the strength of the received signal; the second method is to transmit electromagnetic signals downward from the ground. When the electromagnetic wave signal encounters the metal core or metal armor in the optical cable during transmission, a strong reflection is formed, and the electromagnetic wave signal is reflected back to the receiver on the ground. According to the received electromagnetic wave reflection signal, it is judged whether there is an optical cable under the ground and the laying depth of the optical cable is measured.

[0003] When using electromagnetic waves to detect optical cables laid underground, in addition to optical cables, there are often other metal pipelines laid along the same route underground, such as metal water pipes, power cables, and gas pipelines. The presence of these metal objects makes it very difficult to use electromagnetic waves to detect optical cables.

[0004] How to avoid interference from metal cables other than optical cables and improve the accuracy of measuring the laying depth of optical cables has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The object of the present invention is to provide a device and method for measuring the laying depth of an optical cable, so as to avoid the interference of metal cables other than the optical cable and improve the measurement accuracy of the laying depth of the optical cable.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A device for measuring the laying depth of an optical cable, the device comprising:

[0008] Optical cable vibration detection module, vibration generating device and wireless terminal;

[0009] The vibration generating device is arranged at the position to be measured, and the vibration generating device is used to apply vibration at the position to be measured, serving as a vibration source;

[0010] The input end of the optical cable vibration detection module is connected to one end of the optical cable under test, and the output end of the optical cable vibration detection module is connected to the wireless terminal in a wireless manner; the optical cable vibration detection module is used to obtain the relative value of the vibration intensity of the optical cable under test under the action of the vibration source, and send the relative value of the vibration intensity to the wireless terminal;

[0011] The wireless terminal is used to store and display the relative value of the vibration intensity.

[0012] Optionally, the optical cable vibration detection module includes an optical cable vibration detector, a processor and a wireless transceiver;

[0013] The input end of the optical cable vibration detector is connected to one end of the optical cable to be measured, and the output end of the optical cable vibration detector is connected to the processor;

[0014] The processor is connected to the wireless terminal through the wireless transceiver.

[0015] Optionally, the input end of the optical cable vibration detector is connected to one end of two optical fibers in the optical cable under test, and the other ends of the two optical fibers connected to the input end of the optical cable vibration detector are connected to a common point.

[0016] Optionally, the measuring device further comprises a fiber optic reflector;

[0017] The input end of the optical cable vibration detector is connected to one end of an optical fiber in the optical cable to be tested, and the optical fiber reflector is connected to the other end of the optical fiber connected to the input end of the optical cable vibration detector.

[0018] Optionally, the vibration generating device includes a heavy hammer, a vibration block and a heavy hammer retracting and releasing device;

[0019] The vibration block is arranged at a position to be measured, and a center point mark is arranged on the upper surface of the vibration block;

[0020] The weight retracting and releasing device is connected to the weight through a rope, and is used to make the weight fall to the center point mark on the upper surface of the vibration block in a free fall manner at a preset height.

[0021] Optionally, the wireless terminal is a mobile phone, a tablet or a PC.

[0022] A method for measuring the laying depth of an optical cable, the method being applied to a measuring device, and comprising the following steps:

[0023] A measuring device is used to determine multiple projection points of the optical cable under test on the ground;

[0024] Determine the direction of the optical cable under test according to multiple projection points of the optical cable under test on the ground;

[0025] Taking any one of the multiple projection points as a main vibration point, selecting multiple secondary vibration points on a straight line passing through the main vibration point and perpendicular to the direction of the optical cable under test;

[0026] Using a measuring device to measure relative values ​​of vibration intensity when vibration is applied to the main vibration point and each of the slave vibration points, to obtain a relative value of vibration intensity corresponding to the main vibration point and a relative value of vibration intensity corresponding to each of the slave vibration points;

[0027] Selecting a slave vibration point whose corresponding relative vibration intensity value is half of the relative vibration intensity value corresponding to the main vibration point from among the multiple slave vibration points as a measuring vibration point;

[0028] The distance between the main vibration point and the measured vibration point is measured as the laying depth of the optical cable.

[0029] Optionally, the step of using a measuring device to determine a plurality of projection points of the optical cable under test on the ground specifically includes:

[0030] Randomly select a first measurement point within a preset range;

[0031] Applying vibration to the first measuring point using the measuring device, and collecting a relative value of the vibration intensity corresponding to the first measuring point;

[0032] Determine whether the relative value of the vibration intensity corresponding to the first measurement point is greater than a first preset threshold value, and obtain a first determination result;

[0033] If the first judgment result indicates no, randomly select the next first measurement point within the preset range, and return to the step of "using the measuring device to apply vibration to the first measurement point, and collect the relative value of the vibration intensity corresponding to the first measurement point";

[0034] If the first judgment result indicates yes, then selecting a plurality of second measuring points within a preset range and within a line segment of a first preset length on a straight line passing through the first measuring point;

[0035] Using the measuring device to apply vibration to each of the second measuring points, and collecting a relative value of the vibration intensity corresponding to each of the second measuring points;

[0036] Determine whether a difference between a maximum value and a minimum value among the relative values ​​of vibration intensities corresponding to the plurality of second measurement points is greater than a second preset threshold, and obtain a second determination result;

[0037] If the second judgment result indicates no, the first measuring point is used as the rotation center to update the direction of the straight line passing through the measuring point, and the process returns to the step of "selecting a plurality of second measuring points within a preset range and within a line segment of a first preset length on the straight line passing through the first measuring point".

[0038] If the second judgment result indicates yes, selecting a plurality of third measuring points in a line segment of a second preset length on the updated straight line;

[0039] Using the measuring device to apply vibration to each of the third measuring points, and collecting a relative value of the vibration intensity corresponding to each of the third measuring points;

[0040] A third measurement point with the largest relative value of vibration intensity is selected from the plurality of third measurement points as a projection point.

[0041] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0042] The present invention discloses a device and method for measuring the laying depth of an optical cable, the measuring device comprising: an optical cable vibration detection module, a vibration generating device and a wireless terminal; the vibration generating device is arranged at a position to be measured, and the vibration generating device is used to apply vibration at the position to be measured as a vibration source; the input end of the optical cable vibration detection module is connected to one end of the optical cable to be measured, and the output end of the optical cable vibration detection module is connected to the wireless terminal in a wireless manner; the optical cable vibration detection module is used to obtain the relative value of the vibration intensity of the optical cable to be measured under the action of the vibration source, and send the relative value of the vibration intensity to the wireless terminal; the wireless terminal is used to store and display the relative value of the vibration intensity. The present invention determines the laying depth of the optical cable based on the propagation attenuation law of the point vibration source through the measured relative value of the vibration intensity, thereby avoiding the interference of metal cables other than the optical cable and improving the accuracy of measuring the laying depth of the optical cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 paying creative labor.

[0044] Figure 1 A structural diagram of a device for measuring the laying depth of an optical cable provided by the present invention;

[0045] Figure 2 A structural diagram of the optical cable vibration detection module provided by the present invention;

[0046] Figure 3 A structural diagram of the vibration generating device provided by the present invention;

[0047] Figure 4 A flow chart of a method for measuring the laying depth of an optical cable provided by the present invention;

[0048] Figure 5 A flow chart of a method for measuring the optical cable laying depth provided by an embodiment of the present invention;

[0049] Figure 6 Schematic diagram of a method for measuring the laying depth of an optical cable provided in an embodiment of the present invention;

[0050] Figure 7 A schematic diagram of the calculation of the optical cable laying depth provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0051] The object of the present invention is to provide a device and method for measuring the laying depth of an optical cable, so as to avoid the interference of metal cables other than the optical cable and improve the measurement accuracy of the laying depth of the optical cable.

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] like Figure 1 As shown, the present invention provides a device for measuring the laying depth of an optical cable, the measuring device comprising: an optical cable vibration detection module 1, a vibration generating device 2 and a wireless terminal 3; the vibration generating device 2 is arranged at a position to be measured, and the vibration generating device 2 is used to apply vibration at the position to be measured, as a vibration source; the input end of the optical cable vibration detection module 1 is connected to one end of the optical cable to be measured, and the output end of the optical cable vibration detection module 1 is connected to the wireless terminal 3 in a wireless manner; the optical cable vibration detection module 1 is used to obtain the relative value of the vibration intensity of the optical cable to be measured under the action of the vibration source, and send the relative value of the vibration intensity to the wireless terminal 3; the wireless terminal 3 is used to store and display the relative value of the vibration intensity.

[0054] like Figure 2 As shown, the optical cable vibration detection module 1 includes an optical cable vibration detector 1-1, a processor 1-2 and a wireless transceiver 1-3; the input end of the optical cable vibration detector 1-1 is connected to one end of the optical cable under test, and the output end of the optical cable vibration detector 1-1 is connected to the processor 1-2; the processor 1-2 is connected to the wireless terminal 3 through the wireless transceiver 1-3. That is, the optical cable vibration detector 1-1 is used to detect the vibration of the optical cable under test, and send the detected vibration signal of the optical cable under test to the processor 1-2 for processing, and the processor 1-2 sends the relative value of the vibration intensity to the wireless terminal at the vibration site through the wireless transceiver module via the wireless communication link. The measurement operator can obtain the relative value of the optical cable vibration intensity detected by the optical cable vibration detector in real time through the wireless terminal at the vibration site. The processor is an 89S52 type single chip microcomputer. The wireless terminal is a mobile phone, a tablet or a PC.

[0055] like Figure 3As shown, the vibration generating device 2 includes a weight, a vibration block and a weight retracting device; the vibration block is set at the position to be measured, and a center point mark is set on the upper surface of the vibration block; the weight retracting device is connected to the weight through a rope, and is used to make the weight fall freely at a preset height to the center point mark on the upper surface of the vibration block. The weight mass ranges from 1kg to 10kg, and the material is metal or concrete; the vibration block is a columnar body, with a thickness range of 50mm to 200mm and a cross-sectional area range of 0.09m 2 ~1m 2 , made of concrete or hardwood; one side of the vibration block has a center point mark. The vibration block is placed on the ground, and a heavy hammer falls from a selected height to the center point mark of the vibration block in a free fall manner. The heavy hammer hits the vibration block and generates a vibration signal. The vibration signal propagates downward from the center point of the vibration block through the ground. If there is an optical cable under the ground, the vibration signal will propagate to the optical cable and cause it to vibrate. The height of the heavy hammer falling ranges from 0.2m to 1m.

[0056] As a specific implementation but not limited to this implementation, the input end of the optical cable vibration detector is connected to one end of two optical fibers in the optical cable under test, and the other ends of the two optical fibers connected to the input end of the optical cable vibration detector are connected to a common point.

[0057] The present invention uses dual fibers to detect optical cable vibration at a single end. In this case, an optical fiber reflector is not required, but two optical fibers need to be connected at the far end to form a loop.

[0058] As another specific implementation but not limited to this implementation, the measuring device further includes a fiber optic reflector; the input end of the optical cable vibration detector is connected to one end of an optical fiber in the optical cable to be measured, and the fiber optic reflector is connected to the other end of the optical fiber connected to the input end of the optical cable vibration detector. The reflectivity of the fiber optic reflector ranges from 0.01 to 1.

[0059] The purpose of using a fiber optic reflector is to reflect the optical signal back along the path it came from. In this way, a single optical fiber can be used to detect optical cable vibration at a single end. The reflectivity of the fiber optic reflector ranges from 0.01 to 1.

[0060] Based on the above two specific implementation modes, in the present invention, at one end of the optical cable under test, the optical cable vibration detector is connected to one or two optical fibers of the optical cable under test according to the working mode of the optical cable vibration detector; at the other end of the optical cable under test, the corresponding optical fiber is connected to the optical fiber reflector, or two optical fibers are connected to form a loop; the vibration generating device is placed at the location where the optical cable laying depth needs to be measured, and the optical cable vibration detector and the wireless terminal are connected via a wireless communication link, and the optical cable vibration detector sends the detected relative value of the optical cable vibration intensity to the wireless terminal.

[0061] like Figure 1 As shown, at station A, an optical cable vibration detection module is placed at one end of the optical cable under test; at station B, a vibration generating device and a wireless terminal are placed at the location where the optical cable laying depth needs to be measured; at station C, an optical fiber reflector is used at the other end of the optical cable under test or two optical fibers are connected to form a loop to return the optical detection signal to station A.

[0062] At station A, one end of the optical cable under test, the optical cable vibration detection module is connected to one or two optical fibers of the optical cable under test according to the working mode of the optical cable vibration detector; at station C, the other end of the optical cable under test, the corresponding optical fiber used is connected to the optical fiber reflector, or the two optical fibers are connected to form a loop. The vibration generating device is placed at station B, where the optical cable laying depth needs to be measured. The optical cable vibration detection module and the wireless terminal are connected via a wireless communication link, and the optical cable vibration detection module sends the detected relative value of the optical cable vibration intensity to the wireless terminal. The wireless communication link can be connected by a radio station, a satellite communication link, or a communication link provided by a wireless mobile cellular network. The optical cable vibration detection module sends the detected relative value of the optical cable vibration intensity to the wireless terminal, and the measurement operator can obtain the relative value of the optical cable vibration intensity detected by the optical cable vibration detector in real time through the wireless terminal at the vibration site.

[0063] like Figure 4 As shown, the present invention also provides a method for measuring the laying depth of an optical cable, the measuring method is applied to a measuring device, and the measuring method comprises the following steps:

[0064] Step 401: Use a measuring device to determine a plurality of projection points of the optical cable under test on the ground.

[0065] The step 401 uses a measuring device to determine multiple projection points of the measured optical cable on the ground, specifically including: randomly selecting a first measuring point within a preset range; applying vibration to the first measuring point using the measuring device, and collecting the relative value of the vibration intensity corresponding to the first measuring point; judging whether the relative value of the vibration intensity corresponding to the first measuring point is greater than a first preset threshold value, and obtaining a first judgment result; if the first judgment result indicates no, randomly selecting the next first measuring point within the preset range, and returning to the step of "applying vibration to the first measuring point using the measuring device, and collecting the relative value of the vibration intensity corresponding to the first measuring point"; if the first judgment result indicates yes, selecting multiple second measuring points within the preset range and within a first preset length line segment on a straight line passing through the first measuring point; applying vibration to each of the second measuring points using the measuring device, and collecting the relative value of the vibration intensity corresponding to the first measuring point. Collect the relative value of vibration intensity corresponding to each second measurement point; determine whether the difference between the maximum value and the minimum value of the relative values ​​of vibration intensity corresponding to multiple second measurement points is greater than a second preset threshold value, and obtain a second judgment result; if the second judgment result indicates no, the first measurement point is the rotation center to update the direction of the straight line passing through the measurement point, and return to the step of "selecting multiple second measurement points within a preset range and within a first preset length line segment on the straight line passing through the first measurement point"; if the second judgment result indicates yes, select multiple third measurement points within the second preset length line segment on the updated straight line; use the measuring device to apply vibration to each of the third measurement points respectively, and collect the relative value of vibration intensity corresponding to each of the third measurement points; select the third measurement point with the largest relative value of vibration intensity from the multiple third measurement points as the projection point.

[0066] Step 402, determining the direction of the optical cable under test according to multiple projection points of the optical cable under test on the ground. Find multiple projection points of the optical cable under test on the ground, and the line connecting these projection points constitutes the direction of the optical cable under test.

[0067] Step 403: taking any one of the plurality of projection points as a main vibration point, and selecting a plurality of secondary vibration points on a straight line passing through the main vibration point and perpendicular to the direction of the optical cable under test.

[0068] Step 404 , using a measuring device to measure relative values ​​of vibration intensity when vibration is applied to the main vibration point and each of the slave vibration points, to obtain a relative value of vibration intensity corresponding to the main vibration point and a relative value of vibration intensity corresponding to each of the slave vibration points.

[0069] Step 405 , selecting a slave vibration point whose corresponding relative vibration intensity value is half of the relative vibration intensity value corresponding to the main vibration point from among the multiple slave vibration points as a measurement vibration point.

[0070] Step 406, measuring the distance between the main vibration point and the measurement vibration point as the optical cable laying depth.

[0071] As a specific implementation but not limited to this implementation, Figure 5 The method for measuring the optical cable laying depth of the present invention comprises the following steps:

[0072] a) Connect the measurement system: According to the usage mode of the optical cable vibration detector, at one end of the measured optical cable (station A), the optical cable vibration detector is connected to one or two optical fibers of the measured optical cable; at the other end of the measured optical cable (station C), the corresponding optical fiber used is connected to the optical fiber reflector, or two optical fibers are connected to form a loop; the optical cable vibration detector and the wireless terminal are connected via a wireless communication link, and the optical cable vibration detector sends the detected relative value of the optical cable vibration intensity to the wireless terminal at the vibration occurrence site (station B).

[0073] b) At station B, determine the projection of the measured optical cable on the ground at the measurement location: place a vibration generating device at a location where an optical cable may be laid to generate vibration; if the optical cable vibration detector does not detect the corresponding optical cable vibration, change the position of the vibration generating device until the optical cable vibration detector detects the corresponding optical cable vibration; read the relative value of the optical cable vibration intensity detected by the optical cable vibration detector from the wireless terminal; change the position of the vibration generating device along a certain straight line direction to generate vibration, and read the relative value of the optical cable vibration intensity at the same time. If the relative value of the optical cable vibration intensity measured at two locations with an interval of more than 1m varies by less than 10%, it is considered that the straight line direction is approximately parallel to the direction of the measured optical cable, and the straight line direction of the vibration generating device needs to be changed; at the vibration point where the maximum relative value of the optical cable vibration intensity is obtained, note the center point mark position of the vibration block, and it is considered that the measured optical cable is located vertically below the ground at this position, that is, the center point position of the vibration block is a projection point of the measured optical cable on the ground.

[0074] c) At station B, determine the direction of the optical cable under test: find multiple projection points of the optical cable under test on the ground. The lines connecting these projection points constitute the direction of the optical cable under test.

[0075] d) At station B, select vibration points: select different vibration points, which are on a straight line that is perpendicular to the direction of the optical cable under test, where vibration point 1 is located on the projection of the optical cable under test on the ground, and gradually move the vibration points in a direction away from vibration point 1.

[0076] e) Compare the relative values ​​of the vibration intensity of the optical cable at different vibration points: generate vibration at the selected vibration point, and obtain and record the corresponding relative values ​​of the vibration intensity of the optical cable, and compare the relative values ​​of the vibration intensity of the optical cable obtained when vibration is generated at each vibration point with the relative value A1 of the vibration intensity of the optical cable obtained when vibration is generated at vibration point 1.

[0077] f) Determine the laying depth of the optical cable: the relative value A of the optical cable vibration intensity obtained when the nth vibration point vibrates n =A1 / 2, define this vibration point as vibration point 2, measure the distance L from vibration point 2 to vibration point 1, and the optical cable laying depth D is equal to L.

[0078] like Figure 6 and 7 As shown in the figure, when the optical cable L from vibration point 2 to vibration point 1 is equal to the cable laying depth D, according to the triangular geometric relationship, the distance from vibration point 2 to the measured optical cable is 1.414 times the cable laying depth D. According to the propagation law of point vibration source in free space, the vibration intensity ratio of the same intensity generated by the vibration generating device is 2:1 after propagating from vibration point 1 and vibration point 2 to the measured optical cable. Therefore, when the relative value of the vibration intensity obtained by generating vibration at vibration point 2 is equal to half of the relative value of the vibration intensity obtained by generating vibration at vibration point 1, it can be considered that D is approximately equal to L.

[0079] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0080] The invention discloses a measuring device for the laying depth of an optical cable. The invention firstly generates a vibration signal using a vibration generating device at a position directly above the ground where the measured optical cable is laid, that is, at the projection of the measured optical cable on the ground, and measures the relative value of the vibration intensity of the measured optical cable at a remote end through an optical cable vibration detector; then, on the ground, the vibration generating device is moved in a vertical direction along the direction of the measured optical cable to change the position of the vibration point and measure the relative value of the vibration intensity of the measured optical cable; the relative value of the vibration intensity of the optical cable obtained by placing the vibration generating device at the projection of the measured optical cable on the ground is compared with the relative values ​​of the vibration intensity of the optical cable obtained at other vibration point positions, and the vibration point position where the relative value of the vibration intensity drops to half is found. According to the vibration energy attenuation law and triangular geometric relationship, the distance from the vibration point to the projection of the measured optical cable on the ground is equal to the laying depth of the measured optical cable.

[0081] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0082] This article uses specific examples to illustrate the principles and implementation methods of the invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A method for measuring the laying depth of an optical cable, characterized in that: The measuring method is applied to a measuring device for the laying depth of an optical cable, and the measuring device comprises: Optical cable vibration detection module, vibration generating device and wireless terminal; The vibration generating device is arranged at the position to be measured, and the vibration generating device is used to apply vibration at the position to be measured, serving as a vibration source; The input end of the optical cable vibration detection module is connected to one end of the optical cable under test, and the output end of the optical cable vibration detection module is connected to the wireless terminal in a wireless manner; the optical cable vibration detection module is used to obtain the relative value of the vibration intensity of the optical cable under test under the action of the vibration source, and send the relative value of the vibration intensity to the wireless terminal; The wireless terminal is used to store and display the relative value of vibration intensity; The measuring method comprises the following steps: A measuring device is used to determine multiple projection points of the optical cable under test on the ground; Determine the direction of the optical cable under test according to multiple projection points of the optical cable under test on the ground; Taking any one of the multiple projection points as a main vibration point, selecting multiple secondary vibration points on a straight line passing through the main vibration point and perpendicular to the direction of the optical cable under test; Using a measuring device to measure relative values ​​of vibration intensity when vibration is applied to the main vibration point and each of the slave vibration points, to obtain a relative value of vibration intensity corresponding to the main vibration point and a relative value of vibration intensity corresponding to each of the slave vibration points; Selecting a slave vibration point whose corresponding relative vibration intensity value is half of the relative vibration intensity value corresponding to the main vibration point from among the multiple slave vibration points as a measuring vibration point; The distance between the main vibration point and the measured vibration point is measured as the laying depth of the optical cable.

2. The method for measuring the laying depth of optical cable according to claim 1, characterized in that: The optical cable vibration detection module includes an optical cable vibration detector, a processor and a wireless transceiver; The input end of the optical cable vibration detector is connected to one end of the optical cable to be measured, and the output end of the optical cable vibration detector is connected to the processor; The processor is connected to the wireless terminal through the wireless transceiver.

3. The method for measuring the laying depth of optical cable according to claim 2, characterized in that: The input end of the optical cable vibration detector is connected to one end of two optical fibers in the optical cable to be tested, and the other ends of the two optical fibers connected to the input end of the optical cable vibration detector are connected at a common point.

4. The method for measuring the laying depth of optical cable according to claim 2, characterized in that: The measuring device also includes a fiber optic reflector; The input end of the optical cable vibration detector is connected to one end of an optical fiber in the optical cable to be tested, and the optical fiber reflector is connected to the other end of the optical fiber connected to the input end of the optical cable vibration detector.

5. The method for measuring the laying depth of optical cable according to claim 1, characterized in that: The vibration generating device comprises a heavy hammer, a vibration block and a heavy hammer retracting and releasing device; The vibration block is arranged at a position to be measured, and a center point mark is arranged on the upper surface of the vibration block; The weight retracting and releasing device is connected to the weight through a rope, and is used to make the weight fall to the center point mark on the upper surface of the vibration block in a free fall manner at a preset height.

6. The method for measuring the laying depth of optical cable according to claim 1, characterized in that: The wireless terminal is a mobile phone, a tablet or a PC.

7. The method for measuring the laying depth of optical cable according to claim 1, characterized in that: The method of using a measuring device to determine a plurality of projection points of the optical cable under test on the ground specifically includes: Randomly select a first measurement point within a preset range; Applying vibration to the first measuring point using the measuring device, and collecting a relative value of the vibration intensity corresponding to the first measuring point; Determine whether the relative value of the vibration intensity corresponding to the first measurement point is greater than a first preset threshold value, and obtain a first determination result; If the first judgment result indicates no, then randomly select the next first measurement point within the preset range, and return to the step of "using the measuring device to apply vibration to the first measurement point, and collect the relative value of the vibration intensity corresponding to the first measurement point"; If the first judgment result indicates yes, then selecting a plurality of second measuring points within a preset range and within a line segment of a first preset length on a straight line passing through the first measuring point; Using the measuring device to apply vibration to each of the second measuring points, and collecting a relative value of the vibration intensity corresponding to each of the second measuring points; Determine whether a difference between a maximum value and a minimum value among the relative values ​​of vibration intensities corresponding to the plurality of second measurement points is greater than a second preset threshold, and obtain a second determination result; If the second judgment result indicates no, the first measuring point is used as the rotation center to update the direction of the straight line passing through the measuring point, and the process returns to step "selecting a plurality of second measuring points within a preset range and within a line segment of a first preset length on the straight line passing through the first measuring point". If the second judgment result indicates yes, selecting a plurality of third measuring points in a line segment of a second preset length on the updated straight line; Using the measuring device to apply vibration to each of the third measuring points, and collecting a relative value of the vibration intensity corresponding to each of the third measuring points; A third measurement point with the largest relative value of vibration intensity is selected from the plurality of third measurement points as a projection point.

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