Hollow drum detecting and marking device for thin-layer concrete terrace

Abstract

A thin-layer concrete terrace hollowing detection and marking device comprises a detection vehicle, a knocking hammer, a microphone, a sound signal collecting unit and an automatic spraying machine, and is characterized in that the detection vehicle is provided with a rectangular steel frame vehicle frame, the knocking hammer is used for detecting hollowing, the microphone is used for collecting sound, and the automatic spraying machine is connected with the sound signal collecting unit through a transmission line. A spraying machine control switch signal is transmitted to the automatic spraying machine, and sound collected by the microphone is transmitted to the sound oscilloscope through the sound transmission line; the sound oscilloscope is used for converting sound signals into different curves, and judging the non-hollowing terrace ground and the hollowing terrace ground by observing curve changes of different sounds; the hollowing detecting and marking device for the thin-layer concrete terrace has the advantages that the hollowing detecting and marking device is easy to manufacture and reliable to use, the hollowing position of the terrace can be visually and accurately recognized, and the construction efficiency of large-area hollowing detecting and marking is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of building decoration and renovation construction, and specifically relates to a device for detecting and marking hollowing of thin-layer concrete floors. Background Art

[0002] At present, civil construction projects such as underground garages and residential interior floors require the construction of a thin layer of concrete floor on the structural concrete layer during decoration. However, the thickness of this floor is generally only 50mm-100mm, which is particularly prone to hollowing. The causes of hollowing and cracking may include material problems, construction problems, environmental factors, etc. Specifically, poor material quality, improper base treatment, non-standard construction technology, changes in ambient temperature and humidity, etc. may all cause the floor to hollow and crack. Therefore, before treatment, it is necessary to conduct a comprehensive inspection of the floor to find the specific location of the hollowing and cracking and mark it for subsequent repairs and rectification. The original floor hollowing detection technology still relies on the inspector's ears to identify. If it encounters a noisy environment, its accuracy will be greatly reduced. Moreover, because each inspector has different standards for judging sound, the final judgment of floor hollowing will also be biased.

[0003] Chinese patent CN119086719B describes a device for inspecting and repairing hollowing in lightweight and heavy-duty floors. While this device can detect hollowing by changing the striking position of a force-accumulating striking unit on a guide slider, it cannot mark the hollowing in real time. Therefore, the industry needs to develop an integrated device with reinforced profiles to improve both detection and marking, which has become an urgent engineering challenge. Summary of the Invention

[0004] The purpose of the present invention is to provide a thin-layer concrete floor hollow detection and marking device that converts the knocking sound of the hollow into a visual signal.

[0005] To achieve the above objectives, the technical solution of the present invention is: A thin-layer concrete floor hollow detection and marking device includes a detection vehicle, a percussion hammer, a microphone, a sound signal collection unit, and an automatic sprayer, and is characterized by: The inspection vehicle has a rectangular steel frame, two wheels and a transmission shaft are provided at the bottom of the frame, and a handle is provided at the top of the frame. When the inspection vehicle is in use, one person operates the handle to move on a large floor. The knocking hammer is a knocking hammer for detecting hollow drums. When the wheel drives the rotating shaft to rotate, the knocking hammer is made to knock the ground regularly through the crank arm. The wheel and the rotating shaft are fixedly connected and rotate simultaneously as a whole, and the rotating shaft and the frame are connected through a bearing; the crank of the rotating shaft rotates at a constant speed, and the rocker is driven by the connecting rod to swing back and forth around the fixed axis. When the crank rotates one circle, the rocker completes one reciprocating swing, and the knocking hammer is fixed on the rocker; The microphone is a sound collecting microphone, which is used to collect the sound produced by the hammer hitting the ground. If there is a hollow on the ground, the frequency of the sound produced by the hammer is different from the frequency of the sound produced by the hammer hitting the ground without a hollow. Therefore, the sound signals of different frequencies will show different curves on the oscilloscope, converting the difference in sound into a more intuitive and accurate visual identification. The sound signal collection unit includes a microphone, an analog signal processor, an analog-to-digital converter, a waveform generator and a display. The microphone can convert sound energy into electrical energy and convert sound vibrations into electrical signals. The analog signal processor processes analog signals, amplifies and filters the analog signals output from the microphone, and the analog-to-digital converter converts the processed analog signals into digital signals for computer processing and storage. The waveform generator and display use software to import digital audio files, and the software restores the digital signals into waveform graphs for display. The automatic sprayer transmits the sprayer control switch signal to the automatic sprayer through the transmission line, sprays the paint to the hollow part of the ground and makes a mark. The automatic sprayer controls the switch to control the sprayer to spray the ground so as to mark the corresponding position; the paint nozzle of the sprayer matches the knocking position of the hollow, and can spray the paint to the corresponding position The inspection vehicle is connected to the hammer, microphone, sound signal collection unit, and automatic sprayer to act as a carrier. The sound collected by the microphone is transmitted to the sound oscilloscope via a sound transmission line. The sound oscilloscope converts the sound signal into different curves. By observing the changes in the different sound curves, it is possible to determine whether the floor surface is hollow or not. The thin-layer concrete floor hollowing detection and marking device of the present invention can also be further implemented by adopting the following technical measures.

[0006] The aforementioned thin-layer concrete floor hollowing detection and marking device, wherein the microphone and the oscilloscope matched therewith are integrated devices.

[0007] The aforementioned thin-layer concrete floor hollowing detection and marking device, wherein the software is Adobe Audition or Audacity.

[0008] After adopting the above technical solution, the thin-layer concrete floor hollowing detection and marking device of the present invention has the following advantages: 1. Simple to assemble and reliable to use; 2. Can intuitively and accurately identify the location of floor hollowing; 3. Improve the construction efficiency of large-area hollowing detection and marking. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 Schematic diagram of the structure of an embodiment of the present invention; Figure 2A schematic diagram of a striking hammer motion mechanism according to an embodiment of the present invention; Figure 3 A collection block diagram is used for the sound digitization process of an embodiment of the present invention.

[0010] In the figure: 1 detection wheel, 2 knocking hammer, 3 microphone, 4 sound transmission line, 5 automatic sprayer, 6 sound oscilloscope, 7 sprayer control switch, 8 sprayer transmission line, 9 sprayer paint nozzle, 10 detection vehicle frame, 11 power supply battery pack, 12 connecting pulley, 13 rotating shaft, 14 fixed shaft, 15 connecting rod, 16 sliding block. DETAILED DESCRIPTION

[0011] The present invention will be further described below with reference to the embodiments and the accompanying drawings.

[0012] Example 1 The thin-layer concrete floor hollow detection and marking device of the present invention comprises a detection vehicle, a knocking hammer, a microphone, a sound signal collection unit, and an automatic sprayer.

[0013] Please refer to Figure 1-3The detection wheel 1 can be operated and pushed by one person during use, making it quick and easy to use on large floors. When the wheel drives the rotating shaft to rotate, the hammer 2 for detecting hollows uses a crank arm to allow the hammer to strike the ground regularly. The wheel and the rotating shaft are fixedly connected and rotate simultaneously as a whole, while the rotating shaft and the frame are connected by a bearing; the crank of the rotating shaft rotates at a constant speed, and the rocker is driven by a connecting rod to swing back and forth around the fixed axis. When the crank rotates one circle, the rocker completes one reciprocating swing, and the hammer is fixed to the rocker. Hammer movement mechanism. The microphone 3 for collecting sound collects the sound produced by the hammer hitting the ground; if there is a hollow in the ground, the frequency of the sound produced by the knocking is different from the frequency of the sound produced by knocking on a solid ground without hollows. Therefore, sound signals of different frequencies will display different curves on the oscilloscope, thereby converting the difference in sound into a more intuitive and accurate visual identification. The microphone 3, oscilloscope, etc. are all commercially available integrated equipment and are existing mature scientific and technological products. The microphone used for sound signal collection converts sound energy into electrical energy, converting sound vibrations into electrical signals. In analog signal processing, the analog signal output from the microphone requires amplification, filtering, and other processing. In analog-to-digital conversion, the processed analog signal is converted into a digital signal for computer processing and storage. Waveform generation and display utilize specialized software (such as Adobe Audition or Audacity). After importing a digital audio file, the software can convert the digital signal into a waveform for display. Sound transmission line 4 transmits the sound collected by the microphone to an acoustic oscilloscope. An automatic sprayer 5 sprays paint onto the floor where the hollows are located, marking them. The acoustic oscilloscope 6 converts the sound signals into different curves. By observing the changes in these different sound curves, it is possible to determine whether the floor is hollow or not. The sprayer control switch 7 controls the sprayer to spray paint onto the floor, marking the corresponding locations. The sprayer transmission line 8 transmits the sprayer control switch signal to the automatic sprayer. The sprayer's paint nozzle 9 aligns with the location of the hollows struck, spraying paint to the corresponding locations. The inspection vehicle frame 10 connects various components and plays a bearing role. The rotating shaft 13 is connected synchronously with the traveling rotating shaft of the inspection vehicle.

[0014] Example 2 Installation steps of the thin concrete floor hollowing detection and marking device of the present invention: (1) The inspection vehicle frame is connected into a whole, with two wheels and a transmission shaft installed at the front end and an operating handle at the rear end.

[0015] (2) Connect the hollow hammer to the drive shaft through the crankshaft. When the drive shaft rotates, the hollow hammer will move up and down regularly within a certain range and hit the ground.

[0016] (3) The microphone for collecting the knocking sound is fixed on the side of the hammer near the knocking point.

[0017] (4) Install the automatic sprayer on the inspection vehicle frame and point its nozzle at the ground, on the same surface as the hammer.

[0018] (5) Install the oscilloscope on the frame of the testing vehicle and connect the power supply battery pack 11 to it.

[0019] (6) Detect the handlebar position to fix the sprayer switch and transmit the signal to the sprayer through the transmission line.

[0020] Example 3 Method for using the thin-layer concrete floor hollowing detection and marking device of the present invention: (1) When the inspection vehicle is pushed forward, the hollow hammer continuously and regularly strikes the ground, and different sound signals are displayed through the oscilloscope; (2) The inspector observes the fluctuation of the sound signal displayed by the oscilloscope to distinguish the hollow area and the non-hollow area on the walking line; (3) Use the control switch and automatic sprayer to spray mark the hollow area of ​​the floor.

[0021] The present invention offers substantial advantages and significant technological advancements. The device for detecting and marking hollowing in thin concrete floors is simple to manufacture, reliable to use, and can intuitively and accurately identify the location of hollowing in the floor. It is easy for workers to operate and master, saving construction labor costs. It improves the efficiency of large-area hollowing detection and marking, achieving twice the result with half the effort.

[0022] The above embodiments are intended to illustrate the present invention only and are not intended to limit the present invention. Persons skilled in the art may make various modifications or variations without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions are intended to fall within the scope of the present invention and are defined by the claims.

Claims

1. A device for detecting and marking hollowing in thin concrete floors, comprising a detection vehicle, a hammer, a microphone, a sound signal collection unit, and an automatic sprayer, characterized in that: The inspection vehicle has a rectangular steel frame, two wheels and a transmission shaft are provided at the bottom of the frame, and a handle is provided at the top of the frame. When the inspection vehicle is in use, one person operates the handle to move on a large floor. The knocking hammer is a knocking hammer for detecting hollow drums. When the wheel drives the rotating shaft to rotate, the knocking hammer is made to knock the ground regularly through the crank arm. The wheel and the rotating shaft are fixedly connected and rotate simultaneously as a whole, and the rotating shaft and the frame are connected through a bearing; the crank of the rotating shaft rotates at a constant speed, and the rocker is driven by the connecting rod to swing back and forth around the fixed axis. When the crank rotates one circle, the rocker completes one reciprocating swing, and the knocking hammer is fixed on the rocker; The microphone is a sound collecting microphone, which is used to collect the sound produced by the hammer hitting the ground. If there is a hollow on the ground, the frequency of the sound produced by the hammer is different from the frequency of the sound produced by the hammer hitting the ground without a hollow. Therefore, the sound signals of different frequencies will show different curves on the oscilloscope, converting the difference in sound into a more intuitive and accurate visual identification. The sound signal collection unit includes a microphone, an analog signal processor, an analog-to-digital converter, a waveform generator and a display. The microphone can convert sound energy into electrical energy and convert sound vibrations into electrical signals. The analog signal processor processes analog signals, amplifies and filters the analog signals output from the microphone, and the analog-to-digital converter converts the processed analog signals into digital signals for computer processing and storage. The waveform generator and display use software to import digital audio files, and the software restores the digital signals into waveform graphs for display. The automatic sprayer transmits the sprayer control switch signal to the automatic sprayer through the transmission line, sprays the paint to the hollow part of the ground and makes a mark. The automatic sprayer controls the switch to control the sprayer to spray the ground so as to mark the corresponding position; the paint nozzle of the sprayer matches the knocking position of the hollow, and can spray the paint to the corresponding position Among them: the inspection vehicle is connected to the hammer, microphone, sound signal collection unit, and automatic sprayer to play a carrying role; the sound collected by the microphone is transmitted to the sound oscilloscope through a sound transmission line; the sound oscilloscope converts the sound signal into different curves, and by observing the changes in the curves of different sounds, it can be judged whether the floor surface is hollow or not.

2. The thin concrete floor hollowing detection and marking device according to claim 1, characterized in that: The microphone and the oscilloscope matched therewith are integrated devices.

3. The thin concrete floor hollowing detection and marking device according to claim 1, characterized in that: The software is Adobe Audition and Audacity.

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