Displacement detection device

Abstract

The utility model provides a displacement detection device comprising a protection tube, two ends of which are respectively provided with a first tube cap and a second tube cap; the detection rod is arranged in the protection tube, one end of the detection rod penetrates through the first tube cap to be fixedly connected with a first detection object, and the other end of the detection rod penetrates through the second tube cap to be fixedly connected with a second detection object; the displacement detection unit is arranged on the detection rod, and the displacement detection unit comprises a horizontal displacement potentiometer used for detecting the relative horizontal displacement amount between the first detection object and the second detection object and a settlement displacement potentiometer used for detecting the relative settlement displacement amount between the first detection object and the second detection object. The device disclosed by the utility model can realize horizontal displacement and settlement detection of a monitoring point, is integrally embedded in the monitoring point, is not interfered by factors such as construction procedures and environment, can realize continuous automatic monitoring, is stable and reliable in detection result, and is beneficial to improving the construction progress and reducing the construction cost.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel monitoring, in particular to a displacement detection device. Background Art

[0002] During the tunnel construction process, it is necessary to regularly monitor the settlement and horizontal displacement of the predetermined monitoring points. At present, the general method of detection is to use a manual total station. According to the relevant regulations, the initial support near the face of the newly built tunnel is inspected twice a day, with an optimal interval of 12 hours. Due to process problems, the inspection task will be arranged at night. Manual inspection often makes mistakes, and the monitoring points will be damaged by flying rocks from blasting, steel frames and construction equipment, making it difficult to maintain continuity of the inspection data. Automatic detection can be achieved by using displacement meters, static levels and three-dimensional laser scanners, but displacement meters and static levels cannot detect horizontal displacement, the detection accuracy of three-dimensional laser scanners cannot meet the requirements of the specifications, and the scanning and detection process will affect the construction progress. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a displacement detection device that can realize settlement and horizontal displacement detection of tunnel monitoring points.

[0004] Based on the above purpose, the utility model provides a displacement detection device, including:

[0005] A protective tube, wherein both ends of the tube body of the protective tube are respectively provided with a first tube cap and a second tube cap;

[0006] A detection rod is arranged in the protection tube, one end of the detection rod passes through the first tube cap and is fixedly connected to the first detection object, and the other end of the detection rod passes through the second tube cap and is fixedly connected to the second detection object;

[0007] The displacement detection unit is arranged on the detection rod, and the displacement detection unit includes a horizontal displacement potentiometer for detecting the relative horizontal displacement between the first detection object and the second detection object, and a settlement displacement potentiometer for detecting the relative settlement displacement between the first detection object and the second detection object.

[0008] Optionally, a first opening is formed on the protection tube at a position close to the first detection object and the second detection object, and a second opening is formed on the detection rod at a position corresponding to the first opening, and the first opening and the second opening are used for passing a first fixing member.

[0009] Optionally, a third opening is formed on the protection tube near the displacement detection unit, and a fourth opening corresponding to the third opening is formed on the detection rod, and the third opening and the fourth opening are used for passing a second fixing member.

[0010] Optionally, the protection tube includes a first tube body, a direct tube body, and a second tube body that are connected in sequence, and the direct tube body corresponds to the position of the displacement detection unit.

[0011] Optionally, the detection rod includes a first detection rod and a second detection rod, one end of the first detection rod is fixedly connected to the first detection object, and the other end is connected to the displacement detection unit; one end of the second detection rod is fixedly connected to the second detection object, and the other end is connected to the displacement detection unit.

[0012] Optionally, the other end of the first detection rod is connected to the displacement detection unit via a shift fork, and the other end of the second detection rod is connected to the displacement detection unit via a shift fork.

[0013] Optionally, one end of the detection rod is fixedly connected to the first detection object, and the other end of the detection rod is fixedly connected to the second detection object via a connecting member.

[0014] Optionally, the displacement detection unit includes a processor and an analog-to-digital conversion circuit, the signal output end of the horizontal displacement potentiometer is connected to the first signal input end of the analog-to-digital conversion circuit, the first signal output end of the analog-to-digital conversion circuit is connected to the first signal input end of the processor, the signal output end of the settlement displacement potentiometer is connected to the second signal input end of the analog-to-digital conversion circuit, and the second signal output end of the analog-to-digital conversion circuit is connected to the second signal input end of the processor.

[0015] Optionally, the processor is connected to the ground device via a multi-core cable, the ground device provides power to the processor via the multi-core cable, and the processor transmits the received signal to the ground device via the multi-core cable.

[0016] Optionally, the ground equipment includes a data forwarding device and a procurement and control host. The data forwarding device is buried in a protection box at a predetermined distance from the heading face. The procurement and control host is configured at the tunnel entrance. The processor is connected to the data forwarding device via a multi-core cable and transmits the received signal to the data forwarding device. The data forwarding device transmits the received signal to the procurement and control host wirelessly or by wire.

[0017] From the above description, it can be seen that the displacement detection device provided by the utility model includes: a protective tube and a detection rod and a displacement detection unit inside thereof, and the displacement detection unit includes a horizontal displacement potentiometer and a settlement displacement potentiometer. The device can realize the horizontal displacement and settlement detection of the monitoring point. The device is buried as a whole at the monitoring point, and will not be disturbed by factors such as construction procedures and environment. It can realize continuous automatic monitoring, and the detection results are stable and reliable, which is conducive to improving the construction progress and reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the exploded structure of the device of an embodiment of the utility model;

[0020] Figure 2 A side view of a device according to another embodiment of the present invention;

[0021] Figure 3 A side view of a device according to another embodiment of the present invention from another angle;

[0022] Figure 4 A schematic diagram of a device according to an embodiment of the utility model installed in a tunnel;

[0023] Figure 5 This is a structural block diagram of a displacement detection unit according to an embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of device wiring according to another embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0026] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the utility model should be the common meanings understood by people with ordinary skills in the field to which the disclosure belongs. The "first", "second" and similar words used in the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figure 1As shown, the embodiment of the present application provides a displacement detection device 300, including:

[0028] A protective tube 1, with a first tube cap 2 and a second tube cap 3 respectively disposed at both ends of the tube body of the protective tube;

[0029] A detection rod 4 is arranged in the protective tube, one end of the detection rod passes through the first tube cap 2 and is fixedly connected to the first detection object 100, and the other end of the detection rod passes through the second tube cap 3 and is fixedly connected to the second detection object 200;

[0030] The displacement detection unit 5 is arranged on the detection rod 4, and the displacement detection unit includes a horizontal displacement potentiometer 51 for detecting the relative horizontal displacement between the first detection object 100 and the second detection object 200, and a settlement displacement potentiometer 52 for detecting the relative settlement displacement between the first detection object 100 and the second detection object 200.

[0031] The displacement detection device provided in the embodiment of the present application includes a protective tube 1 and a detection rod 4 and a displacement detection unit 5 therein. The detection rod 4 is passed through the protective tube 1, and both ends of the detection rod 4 are respectively passed through the tube caps at both ends of the protective tube 1. One end of the detection rod 4 is fixedly connected to the first detection object 100, and the other end is fixedly connected to the second detection object 200.

[0032] In some embodiments, the first detection object 100 and the second detection object 200 are structural members arranged at monitoring points in the tunnel, and can be used to detect horizontal displacement and settlement displacement of the monitoring points. Figure 4 As shown, the first detection object 100 and the second detection object 200 can be two adjacent supporting steel frames in the tunnel, and the displacement detection device is connected to the two adjacent steel frames in a horizontal state. A horizontal displacement potentiometer 51 and a settlement displacement potentiometer 52 are set on the detection rod 4. When a relative displacement occurs between the first detection object 100 and the second detection object 200, the detection rod 4 is displaced accordingly. During the displacement process of the detection rod 4, the horizontal displacement potentiometer 51 senses the horizontal displacement signal of the detection rod 4, that is, the relative displacement signal between the first detection object 100 and the second detection object 200 in the horizontal direction, and the settlement displacement potentiometer 52 senses the settlement displacement signal of the detection rod 4, that is, the relative displacement signal between the first detection object 100 and the second detection object 200 in the vertical direction, thereby realizing the horizontal displacement and settlement displacement detection of the monitoring point.

[0033] In some embodiments, the detection rod 4 includes a first detection rod 41 and a second detection rod 42, one end of the first detection rod 41 is fixedly connected to the first detection object 100, and the other end is connected to the displacement detection unit 5; one end of the second detection rod 42 is fixedly connected to the second detection object 200, and the other end is connected to the displacement detection unit 5. In some embodiments, the other end of the first detection rod can be connected to the displacement detection unit through a fork, and the other end of the second detection rod can be connected to the displacement detection unit through a fork, which is convenient for assembly and prevents the displacement detection unit from being stuck during installation.

[0034] In some embodiments, the protection tube 1 includes a first tube body 11, a direct tube body 12, and a second tube body 13 connected in sequence, the direct tube body 12 corresponds to the position of the displacement detection unit 5, and the direct tube body 12 is used to accommodate the displacement detection unit 5. In some embodiments, the inner diameter of the direct tube body 12 is larger than the inner diameters of the first tube body 11 and the second tube body 13, and the inner diameter of the direct tube body 12 is adapted to the size of the displacement detection unit 5. In this way, when the device is assembled, the first detection rod, the first tube body, the displacement detection unit, the direct tube body, the second detection rod, the second tube body, etc. can be installed in sequence, which is convenient for assembly and disassembly.

[0035] In some embodiments, a first opening is formed on the protection tube 1, and a second opening is formed on the detection rod 4 at a position corresponding to the first opening. The first opening and the second opening are used to pass a first fixing member 6 to prevent relative displacement between the protection tube 1 and the detection rod 4.

[0036] In some embodiments, a first opening 141 is formed on the first tube body 11 near the side connected to the first detection object 100, a second opening is formed on the first detection rod 41 at a position corresponding to the first opening 141, a first opening 142 is formed on the second tube body 13 near the side connected to the second detection object 200, and a second opening is formed on the second detection rod 42 at a position corresponding to the first opening 142. When the displacement detection device is installed at the monitoring point, the first fixing members 61 and 62 are respectively inserted into the first openings 141 and 142 and the corresponding second openings to ensure the relevant position requirements during installation. After installation and before spraying concrete, the first fixing members 61 and 62 are pulled out to ensure that the device can realize the measurement function. At the same time, the protection tube 1 is used to protect the detection rod 4 and the displacement detection unit 5 therein to prevent the internal components from being squeezed by concrete, and to ensure that the detection rod 4 can change with the position changes of the first detection object 100 and the second detection object 100. The device is buried as a whole at the monitoring point, and its internal components are protected by a protective tube, which can prevent the internal components from being damaged by external interference and ensure that the internal components can stably and reliably detect displacement signals.

[0037] In some embodiments, the protective tube 1 has a third opening near the displacement detection unit 5, and the detection rod 4 has a fourth opening corresponding to the third opening. The third opening and the fourth opening are used to pass the second fixing member when installing the device at the monitoring point. After the device is installed, the second fixing member is pulled out, which is convenient for installation and can ensure that the detection rod can change with the position change of the first detection object and the second detection object after installation. In some methods, the second tube body 13 has a third opening, and the second detection rod 42 has a fourth opening at a position corresponding to the third opening. When installing the device at the monitoring point, the second fixing member is inserted into the third opening and the fourth opening to prevent the protective tube 1 from squeezing the internal components and ensure the smooth installation of the device as a whole.

[0038] In some other embodiments, the second tube body 13 is provided with multiple third openings, for example, four third openings, and two of the third openings are located on the first radial extension line of the second tube body 13, and the other two third openings are located on the second radial extension line of the second tube body 13; accordingly, fourth openings are respectively provided at positions corresponding to the third openings on the second detection rod 42. When installing the device, the four second fixing members 71, 72, 73, and 74 can be respectively inserted into the corresponding third openings and fourth openings. After the second fixing members are installed, two of the second fixing members 71 and 72 are arranged in parallel, and the other two second fixing members 73 and 74 are arranged in parallel, and two of the second fixing members 71 and 72 are arranged perpendicular to the other two second fixing members 73 and 74. This structure can effectively fix the relative position of the protection tube 1 and the detection rod 4 to avoid the protection tube squeezing the internal components during the installation process, and the positions of the protection tube 1 and the detection rod 4 are relatively fixed, which is beneficial to the installation of the overall device.

[0039] like Figure 2 , 3 As shown, in another embodiment, the length of the protective tube 1 can be flexibly set according to the specific application scenario. More specifically, the lengths of the first tube body 11 and the third tube body 13 can be flexibly set respectively. When the distance between the first detection object and the second detection object can directly install the displacement detection device, the two ends of the displacement detection device can be directly fixed on the first detection object and the second detection object respectively. When the distance between the first detection object and the second detection object is large and the displacement detection device cannot be directly installed, one end of the displacement detection device can be first fixed to one of the detection objects, and the other end is fixedly connected to the other detection object through a connector 9. For example, one end of the detection rod is fixedly connected to the first detection object, and the other end of the detection rod is fixedly connected to the second detection object through a connector (for example, threaded steel).

[0040] Optionally, the protective tube 1 may be made of a polyvinyl chloride (PVC) tube body, and according to application requirements, a PVC tube body with a diameter of 50, 75, 90 or 110 mm may be used. The first fixing member and the second fixing member may be fixing pins.

[0041] like Figure 5 As shown, in some embodiments, the displacement detection unit 5 includes a processor 53 and an analog-to-digital conversion circuit, the signal output end of the horizontal displacement potentiometer 51 is connected to the first signal input end of the analog-to-digital conversion circuit, the first signal output end of the analog-to-digital conversion circuit is connected to the first signal input end of the processor, the signal output end of the settlement displacement potentiometer 52 is connected to the second signal input end of the analog-to-digital conversion circuit, and the second signal output end of the analog-to-digital conversion circuit is connected to the second signal input end of the processor. The horizontal displacement signal sensed by the horizontal displacement potentiometer is converted into a digital horizontal displacement signal by the analog-to-digital conversion circuit and then transmitted to the processor, and the settlement displacement signal sensed by the settlement displacement potentiometer is converted into a digital settlement displacement signal by the analog-to-digital conversion circuit and then transmitted to the processor.

[0042] In some embodiments, the horizontal displacement potentiometer and the settlement displacement potentiometer adopt sliding rheostats. When the detection rod changes position with the relative displacement of the first detection object and the second detection object, the resistance value of the sliding rheostat changes, and the displacement is determined by the changed resistance value, that is, the horizontal sliding rheostat is used to detect the horizontal displacement signal, and the vertical sliding rheostat is used to detect the settlement displacement signal. In some methods, the sliding rheostat adopts a three-wire connection method, and the upper and lower fixed arms are connected to the reference voltage source to provide a reference voltage for the sliding rheostat. The displacement detection unit 5 also includes an emitter follower, which is used for impedance isolation to prevent other circuits from affecting the reference voltage source.

[0043] In some embodiments, the processor is connected to the ground equipment through a multi-core cable, the multi-core cable is inserted into the protective tube 1, the ground equipment provides power to the processor through the multi-core cable, and the processor transmits the digital horizontal displacement signal and the digital settlement displacement signal to the ground equipment through the multi-core cable for ground monitoring. In some embodiments, the processor is connected to the ground equipment through a four-core cable, two of which are used to provide power to the device, and the other two are used to transmit the digital horizontal displacement signal and the digital settlement displacement signal to the ground equipment.

[0044] like Figure 5 As shown, in some embodiments, in order to adapt to remote power supply and reduce the impact of line voltage drop, the ground equipment provides a 12-24V DC power supply to the processor, and the power supply is converted into a 5V operating voltage of the processor through a power supply circuit to power the device.

[0045] In some embodiments, the ground equipment includes data forwarding equipment, a collection and control host, etc. The data forwarding equipment can be buried in a protection box at a predetermined distance from the face, and the collection and control host can be configured at a location such as a tunnel entrance. The processor is connected to the data forwarding equipment through a multi-core cable, and transmits the digital horizontal displacement signal and the digital settlement displacement signal to the data forwarding equipment. The data forwarding equipment then transmits the received signal to the collection and control host wirelessly or wired to complete the collection of the displacement signal. Furthermore, the collection and control host can also transmit the collected signal to a remote server, and the server uniformly collects and monitors the signals of each monitoring point.

[0046] In some embodiments, as the tunnel construction progresses, several displacement detection devices may be installed and buried, and each displacement detection device may be connected to the ground equipment through its own multi-core cable to realize signal collection of each device. Figure 6 As shown, in order to simplify the wiring, two adjacent displacement detection devices can also be connected through a signal bus, and the signals detected by each displacement detection device are transmitted to the ground equipment through the signal bus. The ground equipment parses the received signals according to the unique identification of each displacement detection device to obtain the signals collected by each displacement detection device. The signal of each device is obtained by parsing according to the unique identification of the device, which is a common technology in this field, and the specific parsing method is not described in detail.

[0047] The displacement detection device provided in this embodiment includes a protection tube and a detection rod and a displacement detection unit therein. The protection tube is used to protect the internal components, and the displacement detection unit is used to detect the displacement of the detection rod along with the detection object, thereby realizing horizontal displacement and settlement detection of the monitoring point. By burying the entire device at the monitoring point, it will not be disturbed by factors such as construction procedures and environment, and can realize continuous automatic monitoring. The monitoring results are relatively accurate and reliable, which is conducive to improving construction progress and reducing construction costs.

[0048] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0049] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A displacement detection device, characterized in that: include: A protective tube, wherein both ends of the tube body of the protective tube are respectively provided with a first tube cap and a second tube cap; A detection rod is disposed in the protection tube, one end of the detection rod passes through the first tube cap and is fixedly connected to a first detection object, and the other end of the detection rod passes through the second tube cap and is fixedly connected to a second detection object; The displacement detection unit is arranged on the detection rod, and the displacement detection unit includes a horizontal displacement potentiometer for detecting the relative horizontal displacement between the first detection object and the second detection object, and a settlement displacement potentiometer for detecting the relative settlement displacement between the first detection object and the second detection object.

2. The device according to claim 1, characterized in that The protection tube has a first opening near the first detection object and the second detection object, the detection rod has a second opening corresponding to the first opening, and the first opening and the second opening are used to pass a first fixing member.

3. The device according to claim 1, characterized in that A third opening is formed on the protection tube near the displacement detection unit, and a fourth opening corresponding to the third opening is formed on the detection rod. The third opening and the fourth opening are used for passing a second fixing member.

4. The device according to claim 1, characterized in that The protection tube includes a first tube body, a direct tube body, and a second tube body which are connected in sequence, and the direct tube body corresponds to the position of the displacement detection unit.

5. The device according to claim 1, characterized in that The detection rod includes a first detection rod and a second detection rod, one end of the first detection rod is fixedly connected to the first detection object, and the other end is connected to the displacement detection unit; one end of the second detection rod is fixedly connected to the second detection object, and the other end is connected to the displacement detection unit.

6. The device according to claim 5, characterized in that The other end of the first detection rod is connected to the displacement detection unit through a shift fork, and the other end of the second detection rod is connected to the displacement detection unit through a shift fork.

7. The device according to claim 1, characterized in that One end of the detection rod is fixedly connected to the first detection object, and the other end of the detection rod is fixedly connected to the second detection object via a connecting member.

8. The device according to claim 1, characterized in that The displacement detection unit includes a processor and an analog-to-digital conversion circuit, the signal output end of the horizontal displacement potentiometer is connected to the first signal input end of the analog-to-digital conversion circuit, the first signal output end of the analog-to-digital conversion circuit is connected to the first signal input end of the processor, the signal output end of the settlement displacement potentiometer is connected to the second signal input end of the analog-to-digital conversion circuit, and the second signal output end of the analog-to-digital conversion circuit is connected to the second signal input end of the processor.

9. The device according to claim 8, characterized in that The processor is connected to the ground device via a multi-core cable, the ground device provides power to the processor via the multi-core cable, and the processor transmits the received signal to the ground device via the multi-core cable.

10. The device according to claim 9, characterized in that The ground equipment includes a data forwarding device and a collection and control host. The data forwarding device is buried in a protection box at a predetermined distance from the tunnel face. The collection and control host is configured at the tunnel entrance. The processor is connected to the data forwarding device through a multi-core cable and transmits the received signal to the data forwarding device. The data forwarding device transmits the received signal to the collection and control host wirelessly or wiredly.

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