Slope displacement detection device

Abstract

The utility model relates to the technical field of new-generation information, and discloses a slope displacement detection device which comprises a pull rope displacement sensor, a ground fixing frame used for installing and fixing the pull rope displacement sensor and a controller. The pull rope displacement sensor comprises a sensor body, a detection pull rope connected with the sensor body and a connecting piece used for connecting the end of the detection pull rope with a ground fixing frame, and an auxiliary detection device for preventing distortion of detection data of the pull rope displacement sensor is arranged in the connecting piece. The auxiliary detection device comprises a laser sensor, a pressure sensor, a cantilever support and a fixed seat. The auxiliary detection device is arranged on the basis that an original pull rope displacement sensor detects the displacement of the edge skin, the vibration displacement amount of the pull rope is monitored synchronously through the laser sensor and the pressure sensor, the difference between rainwater impact vibration and slope real deformation can be accurately recognized after data fusion of the two, and traditional errors are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to new generation information technology field, concretely is a kind of slope displacement detection device. BACKGROUND

[0002] In the field of slope displacement monitoring, especially for the monitoring of dam slope, accurately obtaining the slope displacement is crucial to ensure the safety of the dam. Currently, the pull rope displacement sensor is widely used in dam slope displacement monitoring scenarios due to its convenient installation and cost-effectiveness. Its working principle is that the stretching or contraction of the pull rope with the deformation of the slope drives the internal measurement element (such as a potentiometer or encoder) to produce an electrical signal change, thereby realizing the detection of displacement.

[0003] However, under extreme weather conditions such as flood season and heavy rain, the monitoring accuracy of the existing pull rope displacement sensor faces significant challenges. Rainwater impact causes measurement error. During heavy rain, falling rainwater continuously impacts the pull rope, easily causing high-frequency vibration and displacement deformation of the pull rope. This vibration causes the pull rope to deviate from its original straight position, resulting in fluctuation of the reading of the internal measurement element of the sensor, causing measurement error, or even misjudging the false displacement caused by rainwater impact as real deformation of the slope.

[0004] Environmental interference superimposes data distortion, and high-altitude rainwater erosion causes changes in pull rope tension and displacement response lag; further introducing non-deformation error, causing distortion of monitoring data, making it difficult to accurately reflect the actual state of the slope. Therefore, it does not meet the existing needs, and for this purpose, we propose a slope displacement detection device. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of slope displacement detection device to solve the above background technology and the problem that the pull rope displacement sensor in current flood season and heavy rain and other extreme weather conditions, falling rainwater continuously impacts the pull rope, easily causes high-frequency vibration and displacement deformation of the pull rope, makes the pull rope deviate from its original straight position, causes the fluctuation of the reading of the internal measurement element of the sensor, causes measurement error, or even misjudges the false displacement caused by rainwater impact as real deformation of the slope.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A kind of slope displacement detection device, including pull rope displacement sensor, ground fixed frame for installing and fixing pull rope displacement sensor and controller, the pull rope displacement sensor includes sensor body, detection pull rope connected with the sensor body and the connecting piece for connecting the end of the detection pull rope with the ground fixed frame, the connecting piece is internally provided with auxiliary detection device for preventing the pull rope displacement sensor from detecting data distortion.

[0008] Preferably, the connecting piece comprises a fixed shaft, a mounting socket is arranged in the middle of the fixed shaft, an auxiliary detection box is arranged on the outer wall of one side of the fixed shaft, and the auxiliary detection device is arranged in the auxiliary detection box.

[0009] Preferably, the auxiliary detection device comprises a laser sensor, a pressure sensor, a cantilever frame and a fixed seat, the cantilever frame is arranged in an L-shaped structure, the cantilever frame is rotatably connected to the fixed seat through a rotating shaft, the fixed seat is arranged at the bottom of the auxiliary detection box, a through hole is arranged in one end of the cantilever frame for the detection pull rope to pass through, the pressure sensor is arranged at the bottom of the end of the cantilever frame away from the through hole, the bottom of the pressure sensor is connected to the bottom of the auxiliary detection box, the output end of the pressure sensor is abutted to the bottom of the end of the cantilever frame, and the laser sensor is arranged at the top of the auxiliary detection box at the end of the cantilever frame away from the pressure sensor.

[0010] Preferably, the detection pull rope is connected to the end of the fixed shaft through the auxiliary detection box shell and the through hole in sequence.

[0011] Preferably, the ground fixing frame comprises a frame body connected with a fixed pile pre-buried in a slope, a fixed vertical rod is connected to the top of the frame body, a limiting bolt is arranged on the outer wall of one side of the fixed vertical rod, and the fixed shaft is sleeved on the outer circumferential wall of the fixed vertical rod below the limiting bolt through the mounting socket.

[0012] Preferably, the laser sensor, the pressure sensor and the pull rope displacement sensor are electrically connected to the controller in a wireless transmission mode.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] 1. The application has the advantages of simple structure and low cost, the auxiliary detection device is arranged on the basis of the original pull rope displacement sensor for detecting the displacement of the slope, the laser sensor and the pressure sensor are used for synchronously monitoring the vibration displacement of the pull rope, the laser sensor is used for non-contact measurement of the swing amplitude of the cantilever frame, and the high-frequency vibration displacement of the pull rope caused by rainwater impact is captured; the pressure sensor is used for real-time quantization of the vibration impact force, and the difference between the rainwater impact vibration and the real deformation of the slope can be accurately identified after the data fusion, so that the traditional error is reduced.

[0015] 2. The L-shaped cantilever frame acts as a vibration conduction medium, and only when the pull rope deviates in a non-straight line does the swing triggered by rainwater impact occur, and the straight-line stretching of the pull rope does not cause the cantilever frame to move when the slope slowly deforms, so that misjudgment is avoided from the mechanical level.

[0016] 3. The auxiliary detection device is integrated in the connecting piece, does not need to transform the pull rope displacement sensor body, and reduces installation cost.

[0017] 4. In the extreme weather scene of flood season, heavy rain and the like, the traditional sensor often cannot work normally due to data distortion, leading to monitoring interruption, while the device can continuously and effectively collect data under the bad working condition, provides timely and accurate information support for dam safety emergency response, and significantly improves the safety management and emergency processing capacity of the dam under the extreme weather. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall axonometric view of the utility model;

[0019] Figure 2 It is the schematic view of the pull rope displacement sensor connected with the connecting piece through the auxiliary detection device of the utility model;

[0020] Figure 3 It is the schematic view of the connecting piece and the auxiliary detection device structure of the utility model;

[0021] Figure 4 It is the schematic view of the cantilever frame structure of the utility model;

[0022] Figure 5 It is the schematic view of the ground fixed frame structure of the utility model;

[0023] Figure 6 It is the controller and detection equipment connection block diagram of the utility model.

[0024] In the drawing: 1, pull rope displacement sensor; 11, detection pull rope; 12, connecting piece; 121, fixed shaft; 122, installation jack; 123, auxiliary detection box; 13, auxiliary detection device; 131, laser sensor; 132, pressure sensor; 133, cantilever frame; 134, fixed seat; 135, through hole; 2, ground fixed frame; 21, frame body; 22, fixed vertical rod. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] The various devices in the present application file all adopt conventional models in the prior art, and the control mode is controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art, and it is common knowledge in the art, so the present application will not be explained in detail.

[0027] Please refer to the drawings Figure 1 、 Figure 2 、 Figure 5 and Figure 6 , a slope displacement detection device, comprising a pull rope displacement sensor 1, a ground fixing frame 2 for installing and fixing the pull rope displacement sensor 1 and a controller, the pull rope displacement sensor 1 comprises a sensor body, a detection pull rope 11 connected with the sensor body and a connecting piece 12 for connecting the end of the detection pull rope 11 with the ground fixing frame 2, the connecting piece 12 is internally provided with an auxiliary detection device 13 for preventing the detection data of the pull rope displacement sensor 1 from being distorted, providing data calibration support for pull rope displacement monitoring, the connecting piece 12 comprises a fixed shaft 121, an installation insertion hole 122 is throughly provided in the middle of the fixed shaft 121, an auxiliary detection box 123 is connected and arranged on one side of the outer wall of the fixed shaft 121, the auxiliary detection device 13 is located inside the auxiliary detection box 123, the ground fixing frame 2 comprises a frame body 21 connected with the fixed pile pre-buried in the slope, a fixed vertical rod 22 is connected on the top of the frame body 21, a limiting bolt is arranged on one side of the outer wall of the fixed vertical rod 22, the fixed shaft 121 is sleeved on the outer circumferential wall of the fixed vertical rod 22 below the limiting bolt through the installation insertion hole 122, as shown in the drawing, a handle for height adjustment is arranged on the frame body 21, the height of the fixed vertical rod 22 can be adjusted by rotating the handle, and the adjustment is convenient to use.

[0028] In the normal working state of the present application, when the slope displacement occurs, the detection pull rope 11 will be stretched or contracted, the internal measuring element of the pull rope displacement sensor 1 will produce electrical signal change, and the displacement will be converted into electrical signal and transmitted to the controller.

[0029] The detection pull rope 11 is connected with the sensor body at one end, and is connected with the end of the fixed shaft 121 at the other end in sequence by penetrating the through hole 135 in the auxiliary detection device 13 and the shell of the auxiliary detection box 123. The fixed shaft 121 is sleeved on the outer circumferential wall of the fixed vertical rod 22 below the limiting bolt through the mounting hole 122. The body of the pull rope displacement sensor 1 is fixed with the ground fixed frame 2 below the dam slope side, so that the detection pull rope 11 is a straight line. The position of the fixed shaft 121 is limited by the limiting bolt, so that the fixed shaft 121 is stably connected with the fixed vertical rod 22. During detection, in extreme weather such as heavy rain, the falling rainwater impacts the detection pull rope 11, so that the pull rope generates high-frequency vibration and local deformation. The data of the pull rope displacement sensor 1 and the data of the auxiliary detection device 13 are sent to the controller through wireless transmission. On the data processing principle, the controller uses advanced data fusion algorithm and filtering algorithm. Through time sequence synchronization and cross verification of the multi-source data of the pull rope displacement sensor 1 and the auxiliary detection device 13, a reasonable threshold judgment condition is set, false displacement data caused by rainwater impact and other environmental factors is effectively identified and eliminated, and real slope deformation data is retained, so as to improve the accuracy and reliability of the monitoring data.

[0030] Please refer to the attached Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the auxiliary detection device 13 comprises a laser sensor 131, a pressure sensor 132, a cantilever frame 133 and a fixed seat 134. The cantilever frame 133 is arranged in an L-shaped structure, and the middle part of the cantilever frame 133 is rotatably connected to the fixed seat 134 through a rotating shaft. The fixed seat 134 is installed at the bottom of the auxiliary detection box 123. One end of the cantilever frame 133 is provided with a through hole 135 for detecting the through rope 11. In extreme weather such as heavy rain, the falling rainwater impacts the detection rope 11, causing the rope to vibrate at a high frequency and locally deform. At this time, the vibration of the rope is transmitted to the L-shaped cantilever frame 133 in the auxiliary detection device 13 through the through hole 135, driving the cantilever frame 133 to swing around the rotating shaft connected to the fixed seat 134. During the swinging process of the cantilever frame 133, one end will generate pressure changes to the pressure sensor 132, and the other end will change the distance between the laser sensor 131. The laser sensor 131 emits a beam of laser light to the top of the cantilever frame 133 through the internal laser emitter. The reflected light is captured by the receiver in the sensor after the laser light is reflected by the surface of the cantilever frame 133. According to the time difference (time of flight method) or phase difference (phase method) from emission to reception of the laser light, the propagation distance of the laser light is calculated. When the cantilever frame 133 swings due to the vibration of the rope, the distance between the cantilever frame 133 and the sensor changes. By monitoring the distance change in real time, the swing amplitude of the cantilever frame and the vibration displacement of the rope are converted into the swing amplitude of the cantilever frame and the vibration displacement of the rope. The distance change data is converted into an electrical signal, which is transmitted to the controller through wireless transmission for distinguishing between the true displacement of the rope and the false vibration caused by environmental interference (such as rain impact). When the detection rope 11 vibrates due to rain impact and other factors, it will drive the cantilever frame 133 to swing around the rotating shaft. The end of the cantilever frame 133 away from the through hole 135 presses the pressure sensor 132 downward, causing the internal sensitive element of the pressure sensor 132 to elastically deform. The deformation of the sensitive element causes the internal resistance value to change. The resistance change is converted into a voltage signal through a Wheatstone bridge circuit. The surface of the sensitive element generates an electric charge when it is subjected to pressure, which is converted into a voltage or current signal through a charge amplifier. The pressure sensor 132 transmits the electrical signal corresponding to the pressure change to the controller through the circuit, and cooperates with the data of the laser sensor 131 to judge whether the rope vibration is caused by environmental interference (such as rain impact), and then eliminates the false displacement data. The laser sensor 131 and the pressure sensor 132 convert the captured vibration data into an electrical signal, which is transmitted to the controller together with the data of the rope displacement sensor 1 through wireless transmission. After receiving the data, the controller fuses and analyzes the data of the rope displacement sensor 1 and the vibration data of the auxiliary detection device 13. If only the data of the rope displacement sensor 1 fluctuates, and the auxiliary detection device 13 does not detect high-frequency vibration signals, it is determined that the slope has a true displacement. If both data show fluctuations, the algorithm eliminates the false displacement data caused by rain impact, retains the effective data that truly reflects the deformation of the slope, and realizes accurate monitoring.The pressure sensor 132 is located at the bottom of the cantilever frame 133 away from the through hole 135, the bottom of the pressure sensor 132 is connected with the inner bottom of the auxiliary detection box 123, the output end of the pressure sensor 132 is in abutment with the end bottom of the cantilever frame 133, the laser sensor 131 is located at the top of the auxiliary detection box 123 in the cantilever frame 133 away from the pressure sensor 132, the output end of the laser sensor 131 is directed to the top of the cantilever frame 133 above the through hole 135, the laser sensor 131 adopts a non-contact measurement mode, measures the distance change with the top of the cantilever frame 133 through emitting laser, accurately captures the swing amplitude of the cantilever frame 133, and further obtains the vibration displacement amount of the pull rope; the pressure sensor 132 can realize real-time sensing of the pressure change generated when the cantilever frame 133 swings, and quantifies the vibration impact force. The two sensors work cooperatively, collect the pull rope vibration data from different dimensions, and provide multi-source information for data calibration; the detection pull rope 11 is sequentially connected with the shell of the auxiliary detection box 123, the through hole 135 and the end of the fixed shaft 121 away from the sensor body, when the slope slowly deforms, the detection pull rope 11 is linearly stretched and cannot cause the cantilever frame 133 to swing; when the rain impact causes the pull rope to produce non-linear offset vibration, the cantilever frame 133 swings, and the false displacement signal generated by the environmental interference is preliminarily filtered out from the mechanical level, the laser sensor 131, the pressure sensor 132 and the pull rope displacement sensor 1 are connected with the controller in a wireless electrical manner, the controller is installed in the dam monitoring room and is connected with the mobile phone of the on-duty personnel.

[0031] The L-shaped cantilever frame 133 in the auxiliary detection device 13 is connected with the fixed seat 134 through a rotating shaft, is installed at the bottom of the auxiliary detection box 123, and is connected with the end of the fixed shaft 121 after the detection pull rope 11 passes through the through hole 135 at one end of the cantilever frame 133. When the slope slowly deforms, the detection pull rope 11 only has linear stretching, and since the force transmission direction is parallel to the rotating shaft of the cantilever frame 133, the cantilever frame 133 cannot swing. In extreme rainstorm weather, rainwater impact causes the pull rope to have non-linear offset high-frequency vibration and local deformation. The force in the non-linear direction is transmitted to the cantilever frame 133 through the through hole 135 and drives the cantilever frame 133 to swing around the rotating shaft, preliminarily distinguishing, from a mechanical level, the real displacement of the slope and the false displacement signal caused by environmental interference. When the cantilever frame 133 swings under the influence of the vibration of the pull rope, the distance between the cantilever frame 133 and the laser sensor 131 changes. The laser sensor 131 emits laser and measures the return time of reflected light, accurately calculates the distance change of the top of the cantilever frame 133, and further captures the swing amplitude of the cantilever frame 133, so as to obtain the vibration displacement of the pull rope, and the accuracy can reach a high level. When the cantilever frame 133 swings, the end of the cantilever frame 133 changes the pressure on the pressure sensor 132. The pressure sensor 132 converts the pressure change into an electrical signal, and realizes real-time sensing and quantization of the impact force caused by the vibration of the pull rope. The two sensors work cooperatively, collect the vibration data of the pull rope from two different dimensions of displacement and impact force, provide multi-source information support for subsequent data calibration, and send the collected data to the controller through wireless transmission. The controller analyzes and processes the data by using advanced data fusion algorithm and filtering algorithm. When only the data of the pull rope displacement sensor 1 fluctuates, and the auxiliary detection device 13 does not detect high-frequency vibration signal, the controller determines that it is the real displacement of the slope. If the data of the pull rope displacement sensor 1 fluctuates, and the laser sensor 131 and the pressure sensor 132 of the auxiliary detection device 13 also detect vibration data, the false displacement data caused by rainwater impact is removed by algorithm, and the effective data that can truly reflect the deformation of the slope is retained, so as to realize accurate monitoring.

[0032] The laser sensor 131 and the pressure sensor 132 work cooperatively, and the device reduces the measurement error of the traditional pull rope displacement sensor 1 in extreme weather, can accurately capture the slight deformation of the slope, and timely discovers potential safety hazards, so as to provide strong guarantee for safe operation of the dam. The auxiliary detection device 13 is integrated in the connecting piece 12, does not need to modify the original pull rope displacement sensor 1, and can complete the upgrading of the whole device through simple installation and cooperation of the fixed shaft 121 and the ground fixed frame 2, so that the installation process is convenient and efficient, the equipment modification cost is greatly reduced, and the device is convenient for popularization and application in the existing dam slope monitoring system.

[0033] In the flood season, heavy rain and other extreme weather scenarios, the traditional sensor often due to data distortion and can not work properly, resulting in monitoring interruption. And the device by virtue of unique design and intelligent data processing mechanism, can continue, effectively collect data in harsh conditions, for dam safety emergency response to provide timely, accurate information support, significantly improve the dam in extreme weather safety management and emergency handling capacity.

[0034] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0035] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for detecting displacement of a slope, comprising a tensioned rope displacement sensor (1), a ground fixing frame (2) for fixing the tensioned rope displacement sensor (1) and a controller, characterized in that: The pull rope displacement sensor (1) comprises a sensor body, a detection pull rope (11) connected with the sensor body, and a connecting piece (12) for connecting the end of the detection pull rope (11) with the ground fixing frame (2), and the connecting piece (12) is internally provided with an auxiliary detection device (13) for preventing the detection data of the pull rope displacement sensor (1) from being distorted.

2. The device for detecting displacement of a slope according to claim 1, wherein: The connecting piece (12) comprises a fixed shaft (121), a mounting insertion hole (122) is formed through the middle of the fixed shaft (121), and an auxiliary detection box (123) is connected and arranged on one side of the outer wall of the fixed shaft (121), and the auxiliary detection device (13) is located in the auxiliary detection box (123).

3. The device for detecting displacement of a slope according to claim 2, wherein: The auxiliary detection device (13) comprises a laser sensor (131), a pressure sensor (132), a cantilever frame (133) and a fixed seat (134), the cantilever frame (133) is arranged in an L-shaped structure, the cantilever frame (133) is rotatably connected with the fixed seat (134) through a rotating shaft in the middle, the fixed seat (134) is mounted at the bottom of the auxiliary detection box (123), a through hole (135) for the detection pull rope (11) to pass through is formed through one end of the cantilever frame (133), the pressure sensor (132) is located at the bottom of the end of the cantilever frame (133) away from the through hole (135), the bottom of the pressure sensor (132) is connected with the inner bottom of the auxiliary detection box (123), the output end of the pressure sensor (132) abuts against the bottom of the end of the cantilever frame (133), and the laser sensor (131) is located at the top of the auxiliary detection box (123) in the cantilever frame (133) away from the pressure sensor (132) and away from the through hole (135).

4. The device for detecting displacement of a slope according to claim 3, wherein: The end of the detection pull rope (11) away from the sensor body is connected with the end of the fixed shaft (121) in sequence through the shell of the auxiliary detection box (123), the through hole (135) and the fixed shaft (121).

5. The device for detecting displacement of a slope according to claim 4, wherein: The ground fixing frame (2) comprises a frame body (21) connected with a fixed pile pre-buried in a slope, a fixed vertical rod (22) connected with the top of the frame body (21), and a limiting bolt arranged on one side of the outer wall of the fixed vertical rod (22), and the fixed shaft (121) is sleeved on the outer circumferential wall of the fixed vertical rod (22) below the limiting bolt through the mounting insertion hole (122).

6. The device for detecting displacement of a slope according to claim 3, wherein: The laser sensor (131), the pressure sensor (132) and the pull rope displacement sensor (1) are wirelessly connected with the controller through wireless transmission.

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