Building wall hollowing detection equipment and detection method

Abstract

The invention discloses building wall hollowing detection equipment and a detection method, and relates to the technical field of wall defect detection. The building wall hollowing detection equipment comprises a moving mechanism and a detection mechanism, the moving mechanism comprises a vehicle body, the vehicle body is provided with a rotating support, the rotating support is connected with a telescopic supporting rod, the telescopic supporting rod is connected with the detection mechanism, the detection mechanism comprises a fixing seat, the fixing seat is connected with a supporting rod, and the supporting rod is connected with the moving mechanism. The supporting rod is provided with a plurality of mounting rings with different diameters, the mounting rings coincide with the center of the fixing seat, the fixing seat is provided with a vibration exciter for impacting a wall body to generate vibration, and the mounting rings are provided with detectors for obtaining vibration data of the wall body. The number of the geophones on the mounting ring on the outer side is larger than the number of the geophones on the mounting ring on the inner side. The building wall hollowing detection equipment and the detection method have the beneficial effects that the detection is accurate, the hollowing range is determined, and subsequent accurate repair is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of wall defect detection, and in particular to a building wall hollowing detection device and a detection method. Background Art

[0002] Wall inspection is one of the essential inspection items for housing construction project acceptance. Traditional wall quality inspection methods mostly use the method of drilling holes or slots for sampling and verification. This method is not representative and has certain damage to the site. Hollow drum percussion inspection does not require destroying the wall. The staff uses a hollow drum hammer to knock on the wall, so that the hollow drum hammer hits the wall and makes a sound. According to the different sounds made by hollow and solid walls, for example, the sound of knocking on a wall without hollow drums is relatively dull, while the sound of knocking on a hollow drum position is often crisper, to judge whether there is a hollow part in the wall.

[0003] However, when workers use the hollowing hammer method to detect hollowing, they often need to rely on the experience of the inspectors, and the accuracy of the position judgment is relatively poor. The inspectors apply different forces and have different judgment standards for the sound, which can easily lead to misjudgment. In addition, it is difficult to determine the size and area of ​​the hollowing range by the hollowing hammer method. The wall needs to be chiseled open to determine the range, which is very inconvenient for repair.

[0004] Therefore, the prior art needs to be improved. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the judgment accuracy of the method of tapping with a hollow hammer is low, and the size and area of ​​the hollow range cannot be determined. The purpose is to provide a building wall hollowing detection device and detection method, which adopts the corresponding technical scheme and has the beneficial effects of accurate detection, determination of the hollowing range, and facilitation of subsequent precise repairs.

[0006] The present invention is achieved through the following technical solutions:

[0007] A building wall hollowing detection device comprises a moving mechanism and a detection mechanism, wherein the moving mechanism comprises a vehicle body, the vehicle body is provided with a rotating bracket, the rotating bracket is connected with a telescopic strut, the telescopic strut is connected with the detection mechanism, the detection mechanism comprises a fixed seat, the fixed seat is connected with a support rod, the support rod is provided with a plurality of mounting rings of different diameters, the mounting ring coincides with the center of the fixed seat, the fixed seat is provided with a vibration exciter for impacting a wall to generate vibration, the mounting ring is provided with a detector for acquiring wall vibration data, and the number of the detectors on the outer mounting ring is greater than the number of the detectors on the inner mounting ring.

[0008] Furthermore, in the present invention, the above-mentioned exciter includes an air storage bin connected to the fixed seat, the air storage bin is provided with a guide cylinder, a sliding hammer is provided in the guide cylinder, the air storage bin is connected to an air pump, the air storage bin is provided with a valve adapted to the guide cylinder, the air storage bin is also provided with an extension cylinder extending to the interior, and the extension cylinder is provided with an elastic rope for pulling the hammer close to the valve.

[0009] Furthermore, in the present invention, the end of the hammer that strikes is configured as a spherical end, a buffer pad is provided at the end of the hammer away from the spherical end, a conical groove is provided at the center of the end of the hammer away from the spherical end, the conical groove is aligned with the valve, and an exhaust groove is provided on the side wall of the hammer.

[0010] Furthermore, in the present invention, the above-mentioned mounting ring is provided with a mounting hole, an elastic vibration-damping ring is provided on the outer side of the detector, the outer side of the elastic vibration-damping ring is connected to the hole wall of the mounting hole, and the detector is provided with a skirt. When not detected, the bottom surface of the skirt is lower than the bottom surface of the detector, and the bottom surface of the detector is lower than the bottom surface of the mounting ring. During detection, the bottom surfaces of the skirt, the detector and the mounting ring are flush, and the stretched elastic vibration-damping ring drives the detector to press tightly for detection.

[0011] Furthermore, in the present invention, the above-mentioned rotating bracket includes a fixed rod connected to the vehicle body, the fixed rod is rotatably connected to a movable rod, the movable rod is connected to the telescopic support rod, and the fixed rod is also rotatably connected to a push rod, and the push rod is rotatably connected to the movable rod.

[0012] Furthermore, in the present invention, the fixing seat is connected with a connecting rod, the connecting rod is provided with a rotating wheel 1, the telescopic support rod is provided with a rotating wheel 2 cooperating with the rotating wheel 1, and the telescopic support rod is provided with a motor driving the rotating wheel 2 to rotate.

[0013] Furthermore, in the present invention, the detectors on the same mounting ring are evenly spaced and distributed.

[0014] Furthermore, in the present invention, the vehicle body is provided with telescopic supporting legs.

[0015] In a second aspect, the present invention further provides a detection method, which uses the above-mentioned building wall hollowing detection device and further includes the following steps:

[0016] Use a hollowing detection hammer to knock on the wall and mark the wall where hollowing is detected;

[0017] Drive the building wall hollowing detection equipment to the wall to be tested, operate the rotating bracket and telescopic support rod, and make the detector and exciter close to the marked wall;

[0018] The vibrator hits the marked wall surface, and the detector obtains the wall vibration data. The obtained vibration data is transformed into the frequency domain to obtain the vibration spectrum, and the area of ​​the defective area of ​​the wall is determined according to the vibration spectrum.

[0019] Furthermore, in the present invention, the vibration data acquired by the detector includes a signal of the vibration amplitude and a time signal when the vibration is received.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] 1. Accurate test results: The vibration exciter hits the wall to be tested to generate elastic waves. Several detectors are distributed in a ring around the central exciter. The propagation speed of the elastic waves of the wall without hollow drums is constant, and the vibration amplitude of the elastic waves of the wall without hollow drums is linearly attenuated. Therefore, according to the wall vibration data obtained by the detector (including the rotation intensity and the time when the vibration is detected), it can be determined which wall has defects. If multiple detectors detect defects, the wall covered by multiple detectors is the hollow drum range, and the area of ​​the hollow drum range can be calculated by computer. The test results are more accurate than manual knocking and can determine the size of the hollow drum range.

[0022] 2. Facilitate subsequent repairs: After detecting the specific range of hollowing, it can be repaired by opening holes and injecting grout, which reduces damage to the wall and achieves better repair effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0024] Figure 1 It is a schematic diagram of a building wall hollowing detection device of the present invention;

[0025] Figure 2 is a schematic diagram of the detection mechanism of the present invention;

[0026] Figure 3 It is a schematic diagram of the connection between the connecting rod and the telescopic support rod of the present invention;

[0027] Figure 4 The figure is a schematic diagram of the interior of the vibration exciter of the present invention (before striking);

[0028] Figure 5 is an internal schematic diagram of the vibration exciter of the present invention (when struck);

[0029] Figure 6 It is a cross-sectional schematic diagram of the mounting ring and the detector of the present invention (before detection);

[0030] Figure 7 A schematic diagram of a mounting ring and a geophone of the present invention;

[0031] Figure 8 It is a cross-sectional schematic diagram of the mounting ring and the detector of the present invention (during detection).

[0032] Markings and corresponding parts names in the accompanying drawings: 1-moving mechanism, 101-body, 102-telescopic supporting leg, 2-detection mechanism, 201-fixed seat, 202-support rod, 203-mounting ring, 2031-mounting hole, 204-connecting rod, 2041-rotating wheel one, 3-rotating bracket, 301-fixed rod, 302-movable rod, 303-push rod, 4-telescopic support rod, 401-rotating wheel two, 5-exciter, 501-air storage bin, 502-guide cylinder, 503-hammer, 5031-conical groove, 5032-exhaust groove, 504-valve, 505-extension cylinder, 506-elastic rope, 507-buffer pad, 6-detector, 601-elastic vibration damping ring, 602-skirt baffle. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0034] The following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the description of the embodiments of the present invention, "multiple" means at least 2. In the description of the embodiments of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example 1

[0037] Combination Figures 1 to 8 As shown, a building wall hollowing detection device according to Example 1 of the present invention can be used to detect defects such as hollowing and cracks inside the wall. The specific structure is described as follows.

[0038] Combination Figure 1 As shown, the building wall hollowing detection equipment of this embodiment mainly includes two parts: a moving mechanism 1 and a detection mechanism 2, wherein the moving mechanism 1 is used to facilitate the movement of the building wall hollowing detection equipment, and the detection mechanism 2 is used to perform defect detection on the wall surface.

[0039] Further, such as Figure 1 As shown, the mobile mechanism 1 adopts a platform trolley that can be driven independently in the prior art, which is convenient for rapid movement in the site and is conducive to moving to the front of the wall for timely detection when needed. The mobile mechanism 1 includes a vehicle body 101 and a telescopic support leg 102. The bottom of the vehicle body 101 is equipped with four wheels for easy walking. The telescopic support leg 102 is also installed at the bottom of the vehicle body 101. During detection, the telescopic support leg 102 is extended to the ground to lower the center of gravity of the building wall hollowing detection equipment, which is convenient for the building wall hollowing detection equipment to perform detection operations.

[0040] In some implementations of this embodiment, Figure 1 As shown, a rotating bracket 3 is installed on the vehicle body 101, and the rotating bracket 3 is used to raise the height of the detection mechanism 2. The rotating bracket 3 includes a fixed rod 301, a movable rod 302, and a push rod 303. The fixed rod 301 can be made of I-beam and is vertically fixed on the top of the vehicle body 101 by bolts. The right end of the movable rod 302 and the top end of the fixed rod 301 are rotatably connected by inserting a shaft.

[0041] like Figure 1 As shown, the bottom of the push rod 303 is hingedly connected to the left side of the middle position of the fixed rod 301, and the top of the push rod 303 is hingedly connected to the lower side of the middle position of the movable rod 302. The push rod 303 is configured as an electric push rod 303, which can be extended and shortened, and can lift or lower the detection mechanism 2, which is very convenient to use.

[0042] The telescopic support rod 4 is installed at the left end of the movable rod 302 . The telescopic support rod 4 is an electric telescopic rod. The telescopic support rod 4 is connected to the fixing seat 201 of the detection mechanism 2 .

[0043] Further, combined with Figure 1 and Figure 3As shown, a connecting rod 204 is installed on the right side of the fixed seat 201, and a rotating wheel 1 2041 is installed on the connecting rod 204, and a rotating wheel 2 401 is installed on the telescopic support rod 4. The rotating wheel 1 2041 and the rotating wheel 2 401 can be driven in the form of gear meshing or in the form of belts. A motor is also installed on the telescopic support rod 4, and the motor drives the rotating wheel 2 401 to rotate, and then drives the rotating wheel 1 2041 to rotate, so that the fixed seat 201 swings up and down, which is conducive to adjusting the angle to adapt to walls of different angles.

[0044] In some implementations of this embodiment, Figure 1 and Figure 2 As shown, the detection mechanism 2 includes three parts: a fixed seat 201, a support rod 202, and a mounting ring 203, wherein the fixed seat 201 is a circular metal base, and the three support rods 202 are all metal rods. The support rods 202 are fixedly connected to the side of the fixed seat 201, and the three support rods 202 are evenly spaced.

[0045] Further, combined with Figure 2 As shown, five mounting rings 203 are provided, and the diameters of the five mounting rings 203 are different. The mounting rings 203 and the support rod 202 are welded and fixed, and the centers (centers of circles) of the five mounting rings 203 coincide with the center (centers of circles) of the fixing seat 201 .

[0046] Furthermore, Figure 2 As shown, the detector 6 adopts a sensor that can detect vibration in the prior art. The number of detectors 6 on the outer mounting ring 203 is greater than the number of detectors 6 on the inner mounting ring 203. In this embodiment, the numbers of detectors 6 on the five mounting rings 203 from the inner side to the outer side are 15, 18, 24, 30, and 36 respectively. The detectors 6 on each mounting ring 203 are evenly distributed, and the intervals between any two adjacent detectors 6 are equal.

[0047] In some implementations of this embodiment, Figure 2 and Figure 4 As shown, the exciter 5 is installed at the center of the fixed base 201, and is used to impact the wall to generate vibration. The exciter 5 mainly includes three parts: a gas storage bin 501, a guide cylinder 502, and a hammer 503. The gas storage bin 501 has a chamber for storing high-pressure gas. The guide cylinder 502 is cylindrical and is installed at the bottom of the gas storage bin 501. The bottom of the gas storage bin 501 has a hole, and the internal channel of the guide cylinder 502 is connected to the chamber of the gas storage bin 501 through the hole.

[0048] Further, combined with Figure 4As shown, a valve 504 is installed at the hole at the bottom of the gas storage bin 501. The valve 504 adopts an electric gas valve in the prior art, which is used to control the high-pressure gas in the chamber to spray toward the guide cylinder 502. The hammer 503 is cylindrical and installed inside the guide cylinder 502. The diameter of the hammer 503 is equal to or slightly smaller than the inner diameter of the guide cylinder 502. The guide cylinder 502 guides the movement of the hammer 503, so that the hammer 503 accurately impacts the detection mark position.

[0049] Furthermore, two extension tubes 505 extending toward the inner chamber are installed on the bottom surface of the gas storage bin 501, and the lower end openings of the extension tubes 505 are aligned and connected with the top end openings of the guide tubes 502. Figure 4 As shown, an elastic rope 506 is connected to the top wall of the extension tube 505, and the lower end of the elastic rope 506 extends into the guide tube 502 and is fixedly connected to the top surface of the hammer body 503. The two elastic ropes 506 are symmetrically distributed to ensure that the tension of the elastic ropes 506 on the hammer body 503 is balanced.

[0050] Combination Figure 3 and Figure 4 As shown, the lower end of the hammer body 503 is an impact end, and the lower end of the hammer body 503 is designed as a spherical end. The upper end of the hammer body 503 is a flat end, and a rubber cushion 507 is installed on the upper end of the hammer body 503 to reduce the impact of the hammer body 503 when it is pulled back.

[0051] Before impact Figure 4 As shown, at this time, since the gas storage bin 501 is connected to the air pump, the valve 504 is closed, and the air pump inflates the internal chamber through the pipe connected to the upper left corner of the gas storage bin 501 to increase the internal gas pressure. Then the valve 504 is opened, and the high-pressure gas is released from the valve 504 and impacts the center position of the top surface of the hammer body 503. The thrust of the gas is greater than the pulling force of the elastic rope 506, so the gas pushes the hammer body 503 to move downward quickly, and the spherical end of the hammer body 503 impacts the wall to generate vibration. At this time, Figure 5 After the hammer 503 strikes, the gas pressure is released, and the elastic rope 506 pulls the hammer 503 back to contact the bottom surface of the gas storage bin 501 again, preparing for the next strike.

[0052] It should be noted that the computer that plays a control role is installed on the vehicle body 101. The computer is connected to the air pump, valve 504, and detector 6 through cables. The detector 6 feeds back the acquired wall vibration data to the computer.

[0053] Combination Figure 4As shown, further, a conical groove 5031 is provided at the center of the top of the hammer body 503, and the conical groove 5031 is aligned with the valve 504 so that the ejected gas impacts in the conical groove 5031. Long strip-shaped exhaust grooves 5032 are provided on both sides of the side wall of the hammer body 503, so that the elastic rope 506 can pull the hammer body 503 back.

[0054] In some implementations of this embodiment, the impact of the exciter 5 not only causes the wall to vibrate, but also causes the fixing base 201, the support rod 202, and the mounting ring 203 to vibrate, and thus the detector 6 fixed on the mounting ring 203 may produce a large error. Figure 6 , Figure 7 and Figure 8 As shown, a circular mounting hole 2031 is opened on the mounting ring 203, and the detector 6 is placed in the mounting hole 2031. An elastic vibration damping ring 601 is connected between the detector 6 and the mounting hole 2031. The elastic vibration damping ring 601 can be made of a rubber ring sheet. The inner wall of the elastic vibration damping ring 601 is fixedly connected to the outer wall of the detector 6, and the outer wall of the elastic vibration damping ring 601 is fixedly connected to the hole wall of the mounting hole 2031.

[0055] Furthermore, a skirt 602 is provided on the detector 6, and the skirt 602 is used to cover the probe of the detector 6 during detection to prevent external interference with the detection of the detector 6. The skirt 602 is made of rubber.

[0056] Combination Figure 6 As shown, when not testing, the bottom surface of the skirt 602 is lower than the bottom surface of the detector 6, and the bottom surface of the detector 6 is lower than the bottom surface of the mounting ring 203. During testing, the moving mechanism 1 drives the mounting ring 203 to press against the wall, and at this time, the skirt 602, the detector 6 and the bottom surface of the mounting ring 203 press against the wall and are level, and at this time, the elastic vibration damping ring 601 is stretched, driving the detector 6 to press against the wall for testing. The impact of the exciter 5 drives the mounting ring 203 to vibrate, and since the elastic vibration damping ring 601 can play a role in vibration reduction, reducing the impact caused by the vibration of the mounting ring 203, the detection result of the detector 6 is more accurate.

[0057] Example 2

[0058] This embodiment provides a detection method, which adopts the building wall hollowing detection equipment in Embodiment 1.

[0059] During detection, first use a hollow detection hammer to knock on the wall, and mark the wall where hollows are detected, such as drawing a circle with chalk. Manual detection has low costs and is very suitable for preliminary defect detection.

[0060] Drive the building wall hollowing detection device to the wall to be detected, operate the rotating bracket 3 and the telescopic support rod 4, and make the detector 6 and the exciter 5 close to the marked wall surface;

[0061] The exciter 5 strikes the marked wall surface, and the detector 6 obtains the wall vibration data, and performs frequency domain transformation on the obtained vibration data to obtain a vibration spectrum, and determines the area of ​​the defective region of the wall according to the vibration spectrum.

[0062] The vibration data acquired by the detector 6 includes the signal of the vibration amplitude and the time signal when the vibration is received. If the wall is free of defects, the speed of vibration transmission from the inside to the outside is uniform, and the attenuation of the vibration intensity (amplitude) is linear. The vibration data collected by the detector 6 at the defective part and the time of receiving the vibration are deviated from the normal situation, indicating that there is a defect in the wall at the detector 6. If multiple detectors 6 detect defects, the wall covered by multiple detectors 6 is the hollow range, and the area of ​​the hollow range can be calculated using a computer.

[0063] In summary, the present invention provides a building wall hollowing detection device, which includes a moving mechanism 1 and a detection mechanism 2, the moving mechanism 1 includes a body 101, the body 101 is provided with a rotating bracket 3, the rotating bracket 3 is connected to a telescopic strut 4, the telescopic strut 4 is connected to the detection mechanism 2, the detection mechanism 2 includes a fixed seat 201, the fixed seat 201 is connected to a support rod 202, the support rod 202 is provided with a plurality of mounting rings 203 of different diameters, the mounting ring 203 coincides with the center of the fixed seat 201, the fixed seat 201 is provided with an exciter 5 for impacting the wall to generate vibration, the mounting ring 203 is provided with a detector 6 for obtaining wall vibration data, and the number of detectors 6 on the outer mounting ring 203 is greater than the number of detectors 6 on the inner mounting ring 203. The vibrator 5 includes an air storage bin 501 connected to the fixing seat 201, the air storage bin 501 is provided with a guide cylinder 502, a sliding hammer 503 is provided in the guide cylinder 502, the air storage bin 501 is connected to an air pump, the air storage bin 501 is provided with a valve 504 adapted to the guide cylinder 502, and the air storage bin 501 is also provided with an extension cylinder 505 extending to the inside, and the extension cylinder 505 is provided with an elastic rope 506 for pulling the hammer 503 close to the valve 504. The end of the hammer 503 that strikes is configured as a spherical end, and the end of the hammer 503 that is away from the spherical end is provided with a buffer pad 507. A conical groove 5031 is provided at the center of the end of the hammer 503 that is away from the spherical end, and the conical groove 5031 is aligned with the valve 504, and an exhaust groove 5032 is provided on the side wall of the hammer 503. The mounting ring 203 is provided with a mounting hole 2031, and an elastic damping ring 601 is provided on the outer side of the detector 6, and the outer side of the elastic damping ring 601 is connected to the hole wall of the mounting hole 2031. The detector 6 is provided with a skirt 602. When not detecting, the bottom surface of the skirt 602 is lower than the bottom surface of the detector 6, and the bottom surface of the detector 6 is lower than the bottom surface of the mounting ring 203. When not detecting, the bottom surfaces of the skirt 602, the detector 6 and the mounting ring 203 are level, and the stretched elastic damping ring 601 drives the detector 6 to press against each other for detection. The rotating bracket 3 includes a fixed rod 301 connected to the vehicle body 101, and the fixed rod 301 is rotatably connected to the movable rod 302, and the movable rod 302 is connected to the telescopic support rod 4. The fixed rod 301 is also rotatably connected to the push rod 303, and the push rod 303 is rotatably connected to the movable rod 302. The fixing seat 201 is connected with a connecting rod 204, the connecting rod 204 is provided with a rotating wheel 1 2041, the telescopic support rod 4 is provided with a rotating wheel 2 401 matched with the rotating wheel 1 2041, and the telescopic support rod 4 is provided with a motor driving the rotating wheel 2 401 to rotate. The detectors 6 are evenly spaced on the same mounting ring 203. The vehicle body 101 is provided with a telescopic support leg 102.The present invention also provides a detection method, which uses the above-mentioned building wall hollowing detection equipment, and also includes using a hollowing detection hammer to knock the wall surface to mark the wall surface where hollowing is detected; driving the building wall hollowing detection equipment to the wall to be detected, operating the rotating bracket 3 and the telescopic support rod 4, so that the detector 6 and the exciter 5 are close to the marked wall surface; the exciter 5 knocks the marked wall surface, the detector 6 obtains the wall vibration data, and performs frequency domain transformation on the obtained vibration data to obtain a vibration spectrum, and determines the area of ​​the defective area of ​​the wall according to the vibration spectrum. The vibration data obtained by the detector 6 includes a signal of the vibration amplitude and a time signal when receiving the vibration.

[0064] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any 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 building wall hollowing detection device, characterized in that: The invention comprises a moving mechanism (1) and a detection mechanism (2), wherein the moving mechanism (1) comprises a vehicle body (101), the vehicle body (101) is provided with a rotating bracket (3), the rotating bracket (3) is connected to a telescopic support rod (4), the telescopic support rod (4) is connected to the detection mechanism (2), the detection mechanism (2) comprises a fixing seat (201), the fixing seat (201) is connected to a support rod (202), the support rod (202) is provided with a plurality of mounting rings (203) of different diameters, the mounting ring (203) coincides with the center of the fixing seat (201), the fixing seat (201) is provided with an exciter (5) for impacting a wall to generate vibration, the mounting ring (203) is provided with a detector (6) for obtaining wall vibration data, and the number of the detectors (6) on the outer mounting ring (203) is greater than the number of the detectors (6) on the inner mounting ring (203).

2. The building wall hollowing detection device according to claim 1, characterized in that: The vibrator (5) comprises an air storage bin (501) connected to the fixing seat (201), the air storage bin (501) being provided with a guide cylinder (502), a sliding hammer (503) being provided inside the guide cylinder (502), the air storage bin (501) being connected to an air pump, the air storage bin (501) being provided with a valve (504) adapted to the guide cylinder (502), the air storage bin (501) being further provided with an extension cylinder (505) extending to the interior, the extension cylinder (505) being provided with an elastic rope (506) for pulling the hammer (503) close to the valve (504).

3. The building wall hollowing detection device according to claim 2, characterized in that: The end of the hammer body (503) for striking is configured as a spherical end, and a buffer pad (507) is provided at the end of the hammer body (503) away from the spherical end. A conical groove (5031) is provided at the center of the end of the hammer body (503) away from the spherical end, and the conical groove (5031) is aligned with the valve (504). An exhaust groove (5032) is provided on the side wall of the hammer body (503).

4. The building wall hollowing detection device according to claim 1, characterized in that: The mounting ring (203) is provided with a mounting hole (2031); an elastic vibration damping ring (601) is provided on the outer side of the detector (6); the outer side of the elastic vibration damping ring (601) is connected to the hole wall of the mounting hole (2031); the detector (6) is provided with a skirt block (602); when not being tested, the bottom surface of the skirt block (602) is lower than the bottom surface of the detector (6); the bottom surface of the detector (6) is lower than the bottom surface of the mounting ring (203); when testing, the bottom surfaces of the skirt block (602), the detector (6) and the mounting ring (203) are flush, and the stretched elastic vibration damping ring (601) drives the detector (6) to press against each other for testing.

5. The building wall hollowing detection device according to claim 1, characterized in that: The rotating bracket (3) comprises a fixed rod (301) connected to the vehicle body (101); the fixed rod (301) is rotatably connected to a movable rod (302); the movable rod (302) is connected to the telescopic support rod (4); the fixed rod (301) is also rotatably connected to a push rod (303); the push rod (303) is rotatably connected to the movable rod (302).

6. The building wall hollowing detection device according to claim 5, characterized in that: The fixing seat (201) is connected to a connecting rod (204), the connecting rod (204) is provided with a rotating wheel 1 (2041), the telescopic support rod (4) is provided with a rotating wheel 2 (401) matched with the rotating wheel 1 (2041), and the telescopic support rod (4) is provided with a motor for driving the rotating wheel 2 (401) to rotate.

7. The building wall hollowing detection device according to claim 1, characterized in that: The detectors (6) are evenly spaced and distributed on the same mounting ring (203).

8. The building wall hollowing detection device according to claim 1, characterized in that: The vehicle body (101) is provided with telescopic supporting legs (102).

9. A detection method, characterized in that: The building wall hollowing detection device as claimed in claim 1 further comprises the following steps: Use a hollowing detection hammer to knock on the wall and mark the wall where hollowing is detected; Drive the building wall hollowing detection device to the wall to be detected, operate the rotating bracket (3) and the telescopic support rod (4), and make the detector (6) and the exciter (5) close to the marked wall surface; The vibration exciter (5) strikes the marked wall surface, and the detector (6) obtains the wall vibration data, and performs frequency domain transformation on the obtained vibration data to obtain a vibration spectrum, and determines the area of ​​the defective region of the wall according to the vibration spectrum.

10. The detection method according to claim 9, characterized in that: The vibration data acquired by the detector (6) includes a signal of the vibration amplitude and a time signal when the vibration is received.

Images