Crack space change monitoring device and monitoring method

Abstract

The present invention discloses a crack space change monitoring device and a monitoring method. The monitoring method includes using a monitoring device to monitor the crack. The monitoring device includes a box body, a rotating arm, a reflector, a light source assembly and a spectroscope. One end of the rotating arm is slidably connected with a slider, and the other end extends into the box body and is hinged to the box body. The reflector is fixed to one end of the rotating arm extending into the box body, and the reflection path extends to the other end along the rotating arm. The light source assembly is arranged in the box body to form a plurality of incident light beams matched with the reflector, and different incident light beams correspond to different rotation angles of the rotating arm respectively. The spectroscope is arranged between the slider and the reflector, and a first light sensor and a second light sensor are respectively arranged on the two splitting paths, and the second light sensor is arranged on the slider. By monitoring the number and time of the first light sensor and the second light sensor sensing the light signal, the angle change and width change between the structures on both sides of the crack can be determined.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring the spacing or gap between objects or holes that are spaced apart, and in particular to a crack space change monitoring device and a monitoring method. Background Art

[0002] Concrete structures are widely used in highway, water transportation and construction engineering fields. Cracks in concrete structures are a common phenomenon. However, the existence of cracks not only affects the appearance of the building, but may also affect the structural safety of the structure and even cause significant loss of life and property.

[0003] Cracks can be divided into structural cracks and non-structural cracks according to their causes, and can be divided into static cracks, active cracks and developing cracks according to their manifestations. The causes of cracks are complex and their changing trends are difficult to predict. It is particularly important to correctly evaluate concrete cracks and take correct treatment measures. However, existing crack detection technologies only measure the width of cracks, and do not involve the relative movement direction of the structures on both sides of the cracks. It is impossible to understand the relative movement trend of the structures on both sides of the cracks through monitoring data. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention proposes a crack space change monitoring device and monitoring method, which can monitor the angle change and width change between the structures on both sides of the crack. The specific technical solution is as follows:

[0005] In a first aspect, a crack space change monitoring device is provided, comprising:

[0006] The box body has a strip-shaped through hole on the side wall;

[0007] A rotating arm, one end of which is slidably connected to a slider, and the other end of which extends into the box body along a strip-shaped through hole and is hinged to the box body;

[0008] A reflector is fixed at one end of the rotating arm extending into the box body, and a reflection path extends along the rotating arm to the other end;

[0009] A light source assembly is disposed in the box body and is used to form a plurality of incident light beams that cooperate with the reflector, and different incident light beams correspond to different rotation angles of the rotating arm;

[0010] The beam splitter is arranged between the slider and the reflector, and the first light sensor and the second light sensor are respectively arranged on the two beam splitting paths, and the second light sensor is arranged on the slider.

[0011] In combination with the first aspect, in a first implementable manner of the first aspect, the light source assembly includes a plurality of laser light sources, all of which are fixed on an inner wall surface of the box body facing the reflector and are arranged sequentially along a rotation path of the reflector.

[0012] In combination with the first aspect, in a second possible implementation of the first aspect, the light source assembly includes a laser light source and a plurality of total reflection mirrors, all of which are respectively arranged on the inner wall surfaces of the box body on both sides of the rotating arm, the laser light source is fixed on the inner wall surface of the box body, and the emitted laser is reciprocatedly reflected between all the total reflection mirrors to form a plurality of incident light beams.

[0013] In combination with the first aspect, in a third possible implementation of the first aspect, an installation cavity is opened in the rotating arm, and the installation cavity extends from one end of the rotating arm to the other end. The reflector, the beam splitter and the slider are all arranged in the installation cavity, and a light-through hole is opened in the installation cavity where the reflector is located.

[0014] In combination with the first aspect, in a fourth implementation manner of the first aspect, the beam splitter is a polarization beam splitter prism.

[0015] In combination with the first aspect, in a fifth implementation manner of the first aspect, it further includes a box body base and a slider base, and the box body base and the slider base are fixedly connected to the box body and the slider through support rods respectively.

[0016] In combination with the fifth aspect, in a sixth possible implementation of the first aspect, a rotating platform is provided on the base of the box body, the rotating platform is fixed to the box body through a support rod, and is provided with an angle sensor.

[0017] In a second aspect, a method for monitoring crack spatial changes is provided, comprising: using the above-mentioned crack spatial change monitoring device to monitor the spatial changes of cracks.

[0018] In conjunction with the second aspect, in a first implementable manner of the second aspect, using the crack spatial change monitoring device to monitor the spatial change of the crack includes:

[0019] The box body and the slider are fixedly installed on the structures on both sides of the crack respectively;

[0020] Start the light source assembly to emit a laser beam;

[0021] Collecting information about the number of times and time when the first light sensor and the second light sensor receive the light signal;

[0022] The width change and angle change of the crack are determined according to the number information and the time information.

[0023] In conjunction with the first implementable manner of the second aspect, in a second implementable manner of the second aspect, determining the width change includes:

[0024] Calculating a reception time difference of the optical signal according to time information of the optical signal received by the first optical sensor and the second optical sensor;

[0025] The distance data between the beam splitter and the slider is calculated by combining the receiving time difference and the speed of light;

[0026] The width variation of the crack is determined by combining the historical distance data between the beam splitter and the slider.

[0027] Beneficial effect: By adopting the crack space change monitoring device and monitoring method of the present invention, the box body and the slider can be respectively fixed on the structures on both sides of the crack, and multiple incident light beams can be formed in the box body through the light source assembly. When the structures on both sides of the crack move relatively, the rotating arm can rotate accordingly to drive the reflector to rotate. When the reflector rotates to the incident light beam, the incident light beam can be reflected on the spectroscope under the action of the reflector. The spectroscope can split the incident light beam into two light signals, which are respectively transmitted to the first light sensor and the second light sensor. By real-time monitoring the number of times and the time difference of the light signals received by the first light sensor and the second light sensor, the angle change and width change between the structures on both sides of the crack can be monitored in real time, without the need to separately set up an angle measuring device and a width measuring device to respectively monitor the width and angle change of the crack. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0029] Figure 1 A schematic diagram of the structure of a crack space change monitoring device provided by an embodiment of the present invention;

[0030] Figure 2 for Figure 1 The internal structure schematic diagram of the crack space change monitoring device shown;

[0031] Figure 3 for Figure 2 A side view of the crack space change monitoring device shown;

[0032] Figure 4 A schematic diagram of the structure of a crack space change monitoring device provided by another embodiment of the present invention;

[0033] Figure 5 A flow chart of a method for monitoring crack space changes provided by an embodiment of the present invention;

[0034] Reference numerals:

[0035] 1-box body, 2-strip through hole, 3-rotating arm, 4-slider, 5-reflector, 6-beam splitter, 7-first light sensor, 8-second light sensor, 9-laser light source, 10-box body base, 11-slider base, 12-rotating table, 13-total reflection mirror. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0037] Embodiment 1

[0038] like Figure 1 The structural schematic diagram of the crack space change monitoring device shown in FIG. 1 includes:

[0039] The box body 1 has a strip-shaped through hole 2 on its side wall;

[0040] The rotating arm 3 has one end slidably connected to the slider 4, and the other end extends into the box body 1 along the strip-shaped through hole 2 and is hinged to the box body 1;

[0041] A reflector 5 is fixed to one end of the rotating arm 3 extending into the box body 1, and a reflection path extends along the rotating arm 3 to the other end;

[0042] A light source assembly is disposed in the box body 1 and is used to form a plurality of incident light beams that cooperate with the reflector 5, and different incident light beams correspond to different rotation angles of the rotating arm 3;

[0043] The beam splitter 6 is disposed between the slider 4 and the reflector 5 , and a first light sensor 7 and a second light sensor 8 are respectively disposed on two beam splitting paths, and the second light sensor 8 is disposed on the slider 4 .

[0044] Specifically, if Figure 2 , Figure 3 As shown, the monitoring device is composed of a box body 1, a rotating arm 3, a reflector 5, a light source assembly and a spectroscope 6. A strip-shaped through hole 2 can be opened in the vertical direction on the side wall of the box body 1 to connect the inside of the box body 1. One end of the rotating arm 3 can extend into the box body 1 along the strip-shaped through hole 2 and be hinged to a connecting shaft horizontally arranged in the box body 1.

[0045] The other end of the rotating arm 3 is provided with a slider 4, which is slidably connected to the rotating arm 3. The slider 4 and the box body 1 can be vertically fixed on the structures on both sides of the crack. When the structures on both sides of the crack move relatively, such as one side of the structure sinks in the vertical direction, the rotating arm 3 will rotate accordingly. Or when one side of the structure moves in the horizontal direction, the slider 4 will move horizontally along the rotating arm 3 accordingly.

[0046] A reflector 5 can be fixedly arranged at one end of the rotating arm 3 extending into the box body 1, and when the rotating arm 3 rotates, the reflector 5 can rotate synchronously with the rotating arm 3. A light source assembly can be arranged in the box body 1, and the light source assembly can form a plurality of parallel incident light beams in the box body 1, and the incident light beams are perpendicular to the rotation plane of the rotating arm 3 and are sequentially spaced along the rotation path of the reflector 5.

[0047] When the reflector 5 rotates to the incident light beam, the incident light beam can propagate along the reflection path of the reflector 5 under the action of the reflector 5, and the reflection surface of the reflector 5 can be at an angle of 45 degrees with the rotating arm 3. In this way, the reflection path of the reflector 5 can extend along the rotating arm 3 to the slider 4.

[0048] A beam splitter 6 can be arranged between the reflector 5 and the slider 4. Under the action of the beam splitter 6, the reflected light beam of the reflector 5 can be divided into two light signals that propagate along two beam splitting paths respectively. A first light sensor 7 and a second light sensor 8 can be arranged on the two beam splitting paths respectively. The second light sensor 8 can be fixed on the slider 4 and can move with the slider 4.

[0049] Since there is a gap between adjacent incident light beams, when the reflector 5 rotates with the rotating arm 3 to between two adjacent incident light beams, since there is no incident light beam on the reflector 5, the first light sensor 7 and the second light sensor 8 cannot sense the light signal. When the reflector 5 rotates to the incident light beam, the first light sensor 7 and the second light sensor 8 can sense the light signal under the action of the reflector 5 and the beam splitter 6. Therefore, by monitoring the number of times the first light sensor 7 and the second light sensor 8 receive the light signal, the angle change of the structures on both sides of the crack can be determined.

[0050] Moreover, the time when the laser beam emitted by the light source assembly is transmitted to the optical splitter can be determined by the time when the first optical sensor 7 senses the optical signal. The time when the laser beam is transmitted to the slider 4 can be determined by the time when the second optical sensor 8 senses the optical signal. The time when the optical signal is transmitted from the optical splitter to the slider 4 can be determined by the time difference between the first optical sensor 7 and the second optical sensor 8 when the optical signal is sensed. The distance between the slider 4 and the optical splitter can be calculated in combination with the propagation speed of light, thereby determining the change in the width of the crack.

[0051] In this embodiment, optionally, the light source assembly includes a plurality of laser light sources 9 , all of which are fixed on the inner wall surface of the box body 1 facing the reflector 5 , and are arranged in sequence along the rotation path of the reflector 5 .

[0052] In this embodiment, the light source assembly can be composed of multiple laser light sources 9, all of which are evenly distributed on the inner wall surface of one side of the box body 1 around the rotation axis of the rotating arm 3, and the light propagation directions of all laser light sources 9 are perpendicular to the rotation plane of the reflector 5, and are arranged in sequence along the rotation path of the reflector 5. In this way, the laser light beams emitted by each laser light source 9 can correspond one by one to the different rotation angles of the rotating arm 3.

[0053] When the reflector 5 rotates to the laser light source 9, the laser light emitted by the laser light source 9 can be incident on the reflector 5 at an incident angle of 45 degrees, and then reflected on the beam splitter 6 at a reflection angle of 45 degrees, so that the first light sensor 7 and the second light sensor 8 sense the light signal. When the reflector 5 continues to rotate with the rotating arm 3 to between two adjacent laser light sources 9, there is no laser incident on the reflector 5, and the first light sensor 7 and the second light sensor 8 sense no light signal.

[0054] In this embodiment, optionally, an installation cavity is opened in the rotating arm 3, and the installation cavity extends from one end of the rotating arm 3 to the other end. The reflector 5, the beam splitter 6 and the slider 4 are all arranged in the installation cavity, and the installation cavity at the position of the reflector 5 is opened with a light through hole.

[0055] A long strip-shaped installation cavity may be provided inside the rotating arm 3, and the installation cavity may extend from one end to the other end of the rotating arm 3. A light-through hole may be provided at the rotating arm 3 where the laser light source 9 is aligned, and the light-through hole is connected to the installation cavity. The reflector 5 may be installed in the installation cavity directly opposite to the light-through hole, and the beam splitter 6 and the slider 4 may be installed in the installation cavity.

[0056] The laser emitted by the laser light source 9 can be injected into the mounting cavity through the light hole, and then reflected along the mounting cavity to the beam splitter 6 under the action of the reflector 5. In order to avoid the two beams of light separated by the beam splitter 6 from affecting each other, the beam splitter 6 can use a polarizing beam splitter prism, which can split the reflected light beam into two perpendicular light beams.

[0057] One of the light beams can be transmitted horizontally along the mounting cavity to the slider 4 to be received by the second light sensor 8, and the other can be transmitted vertically upward to be received by the first light sensor 7 disposed above the beam splitter 6. Since the propagation path of the laser is in a relatively closed mounting cavity, the interference of external light on the light sensor can be reduced.

[0058] In this embodiment, optionally, a box body base 10 and a slider base 11 are further included, and the box body base 10 and the slider base 11 are fixedly connected to the box body 1 and the slider 4 respectively through support rods.

[0059] In order to facilitate the installation of the box body 1 and the slider 4, the monitoring device is further provided with a box body base 10 and a slider base 11. The box body 1 is fixed to the box body base 10 located below through a support rod. Long through holes can be provided on both sides of the rotating arm 3 to connect to the installation cavity. Fixing ears can be provided on both sides of the slider 4. The fixing ears on both sides can extend out of the installation cavity along the through holes and be fixed to the slider base 11 located below the rotating arm 3 through the support rod. When in use, the box body base 10 and the slider base 11 can be fixed to the structures on both sides of the crack using rivets.

[0060] Embodiment 2

[0061] The second embodiment is substantially the same as the first embodiment, and the main difference is that a rotating platform 12 is provided on the box body base 10, the rotating platform 12 is fixed to the box body 1 through a supporting rod, and an angle sensor is provided.

[0062] Specifically, the structures on both sides of the crack may also shift in the horizontal direction. In order to monitor the angle change of the crack in the horizontal direction, a rotating table 12 can be set on the box base 10, and the support rod connected to the box body 1 can be fixed on the rotating table 12. In this way, when the structures on both sides of the crack shift in the horizontal direction, under the action of the rotating arm 3, the box body 1 can rotate along the direction of the structural deviation. The angle sensor set on the box base 10 can monitor the horizontal rotation angle of the box body 1, and the angle change of the crack in the horizontal direction can be immediately determined.

[0063] Embodiment 3

[0064] Embodiment 3 is substantially the same as Embodiment 1, the main difference being that the light source assembly comprises a laser light source 9 and a plurality of total reflection mirrors 13, all of the total reflection mirrors 13 are respectively arranged on the inner wall surfaces of the box body 1 on both sides of the rotating arm 3, the laser light source 9 is fixed on the inner wall surface of the box body 1, and the emitted laser is reciprocatedly reflected between all of the total reflection mirrors 13 to form a plurality of the incident light beams.

[0065] Specifically, if Figure 4 As shown, the light source assembly can be composed of a laser light source 9 and multiple total reflection mirrors 13. All total reflection mirrors 13 can be evenly distributed on the inner wall surface of the box body 1 on both sides of the rotating arm 3 along the vertical direction. The total reflection mirrors 13 on both sides of the rotating arm 3 can be alternately divided into vertical reflection mirrors 5 and horizontal reflection mirrors 5 in order from bottom to top.

[0066] The reflection path of the vertical reflector 5 forms an angle of 45 degrees with the normal line of the incident plane of the adjacent transverse reflector 5 located above on the same side. The reflection path of the transverse reflector 5 forms an angle of 45 degrees with the normal line of the incident plane of the vertical reflector 5 arranged opposite to the other side of the rotating arm 3. By alternately arranging the total reflection mirrors 13 on both sides of the rotating arm 3 in this way, a light propagation path in the shape of a staircase can be formed, which is alternately transmitted back and forth between the total reflection mirrors 13 on both sides of the rotating arm 3 from bottom to top.

[0067] The laser light source 9 can emit a laser beam along the incident light path of the total reflection mirror 13 located at the bottom, and the laser beam can be transmitted to the total reflection mirror 13 located at the top along the constructed light propagation path to form multiple incident light beams perpendicular to the rotation plane on the rotation path of the reflection mirror 5, thereby reducing the number of laser light sources 9.

[0068] A method for monitoring crack space changes includes: using the above-mentioned crack space change monitoring device to monitor the space changes of cracks.

[0069] In this embodiment, optionally, using the crack space change monitoring device to monitor the space change of the crack includes:

[0070] Step 1: fix the box body 1 and the slider 4 on the structures on both sides of the crack respectively;

[0071] Step 2, start the light source assembly to emit a laser beam;

[0072] Step 3, collecting the number of times and time information of the light signal received by the first light sensor 7 and the second light sensor 8;

[0073] Step 4: Determine the width change and angle change of the crack according to the number information and time information.

[0074] Specifically, if Figure 5 As shown, first, the box body 1 and the slider 4 need to be fixed to the structures on both sides of the crack, so that when the structures on both sides of the crack move in the vertical direction, the rotating arm 3 can rotate accordingly. Or when the structures on both sides of the crack move in the horizontal direction, the slider 4 can slide along the rotating arm 3 accordingly. By monitoring the angle change of the rotating arm 3 and the displacement of the slider 4, the angle change and width change of the crack can be determined.

[0075] Then, start the light source assembly, which can form multiple laser beams perpendicular to the rotation plane on the rotation path of the rotating arm 3. When the reflector 5 on the rotating arm 3 passes through these laser beams, the reflector 5 can reflect the laser beams to the beam splitter 6 set on the rotating arm 3. The beam splitter 6 can split the laser beam into two light signals, which are respectively transmitted to the first light sensor 7 located above the beam splitter 6 and the second light sensor 8 located on the slider 4.

[0076] Afterwards, the data collector can collect the number of times and time information of the light signal received by the first light sensor 7 and the second light sensor 8, where the number of times includes the number of times the light sensor receives the light signal, that is, the number of laser beams passing through the reflector 5. The time information includes the time when the light signal is sensed.

[0077] Finally, the rotation angle of the rotating arm 3 can be determined by the number of times the optical sensor receives the light signal and the corresponding rotation angle of the laser beam, and then the angle change on both sides of the crack can be determined. The time when the laser beam emitted by the light source assembly is transmitted to the optical splitter can be determined by the time when the first optical sensor 7 senses the light signal. The time when the laser beam is transmitted to the slider 4 can be determined by the time when the second optical sensor 8 senses the light signal. In this way, the time when the light signal is transmitted from the optical splitter to the slider 4 can be determined by the time difference between the first optical sensor 7 and the second optical sensor 8 sensing the light signal. The distance between the slider 4 and the optical splitter can be calculated in combination with the propagation speed of light, thereby determining the change in the width of the crack.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A crack space change monitoring device, characterized in that: include: The box body has a strip-shaped through hole on the side wall; A rotating arm, one end of which is slidably connected to a slider, and the other end of which extends into the box body along a strip-shaped through hole and is hinged to the box body; A reflector is fixed at one end of the rotating arm extending into the box body, and a reflection path extends along the rotating arm to the other end; A light source assembly is disposed in the box body and is used to form a plurality of incident light beams that cooperate with the reflector, and different incident light beams correspond to different rotation angles of the rotating arm; A beam splitter is arranged between the slider and the reflector, and a first light sensor and a second light sensor are respectively arranged on two light splitting paths, the second light sensor is arranged on the slider, and the beam splitter is a polarization beam splitter prism; It also includes a box body base and a slider base, which are fixedly connected to the box body and the slider through support rods respectively; The light source assembly includes a plurality of laser light sources, all of which are fixed on the inner wall surface of the box body facing the reflector and are arranged in sequence along the rotation path of the reflector.

2. A crack space change monitoring device, characterized in that: include: The box body has a strip-shaped through hole on the side wall; A rotating arm, one end of which is slidably connected to a slider, and the other end of which extends into the box body along a strip-shaped through hole and is hinged to the box body; A reflector is fixed at one end of the rotating arm extending into the box body, and a reflection path extends along the rotating arm to the other end; A light source assembly is disposed in the box body and is used to form a plurality of incident light beams that cooperate with the reflector, and different incident light beams correspond to different rotation angles of the rotating arm; A beam splitter is arranged between the slider and the reflector, and a first light sensor and a second light sensor are respectively arranged on two light splitting paths, the second light sensor is arranged on the slider, and the beam splitter is a polarization beam splitter prism; It also includes a box body base and a slider base, which are fixedly connected to the box body and the slider through support rods respectively; The light source assembly includes a laser light source and a plurality of total reflection mirrors, all of which are respectively arranged on the inner wall surface of the box body at both sides of the rotating arm, the laser light source is fixed on the inner wall surface of the box body, and the emitted laser beam forms an angle of 45 degrees with the mirror surface of the top or bottom total reflection mirror; The total reflection mirrors on both sides of the rotating arm are alternately divided into vertical reflection mirrors and transverse reflection mirrors in order from bottom to top, wherein the reflection path of the vertical reflection mirror forms an angle of 45 degrees with the normal of the incident plane of the adjacent transverse reflection mirror located above on the same side, and the reflection path of the transverse reflection mirror forms an angle of 45 degrees with the normal of the incident plane of the vertical reflection mirror arranged oppositely on the other side of the rotating arm.

3. The crack space change monitoring device according to claim 1 or 2, characterized in that: An installation cavity is provided in the rotating arm, and the installation cavity extends from one end of the rotating arm to the other end. The reflector, the beam splitter and the slider are all arranged in the installation cavity, and a light-through hole is provided in the installation cavity at the position of the reflector.

4. The crack space change monitoring device according to claim 1 or 2, characterized in that: A rotating platform is arranged on the box body base, the rotating platform is fixed to the box body through a supporting rod, and an angle sensor is arranged on the rotating platform.

5. A method for monitoring crack space changes, characterized in that: include: The crack spatial variation monitoring device as claimed in claim 1 or 2 is used to monitor the spatial variation of the crack.

6. The method for monitoring crack space changes according to claim 5, characterized in that: Using the crack space change monitoring device to monitor the space change of cracks includes: The box body and the slider are fixedly installed on the structures on both sides of the crack respectively; Start the light source assembly to emit a laser beam; Collecting information about the number of times and time when the first light sensor and the second light sensor receive the light signal; The width change and angle change of the crack are determined according to the number information and the time information.

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