Concrete slab thickness detection device and method

Abstract

The invention provides a concrete slab thickness detection device and method. The concrete slab thickness detection device comprises a first rod body, a second rod body, an adjusting assembly and a probe. The second rod body is telescopically arranged at the lower end of the first rod body. The adjusting assembly is connected with the first rod body and the second rod body and adjusts the length of the second rod body extending out of the bottom end of the first rod body; the probe is fixed at the lower end of the first rod body and extends along the telescopic direction of the second rod body; a first annular electrode is arranged at the lower end of the second rod body, and a plurality of second annular electrodes are distributed in the axial direction of the probe at intervals; in the using state, the first annular electrodes are used for stretching into unsolidified to-be-detected concrete along with the second rod bodies, the current on-off states of the second annular electrodes are recognized through the detection module, the positions of the second annular electrodes corresponding to the surface of the concrete are determined, and the actual thickness of the concrete slab is obtained. The concrete slab thickness detection device can be suitable for slab thickness detection of different concrete slabs.

Description

Technical Field

[0001] This application relates to the field of building construction, and more specifically, to a device and method for detecting the thickness of concrete slabs. Background Technology

[0002] When pouring concrete for a building structure, the thickness of the concrete slab needs to be measured after the concrete slab is poured. Currently, fixed welded inserts are commonly used. However, since most building structures have multiple slab thicknesses, corresponding inserts need to be made for each thickness. Using this method requires carrying inserts of the corresponding dimensions for all slab thicknesses in the structural layer, which is not convenient and easily wastes steel, resulting in limited adoption of inserts in construction operations. At the same time, when using fixed welded inserts and traditional manual measurement methods, it relies heavily on the visual observation and touch of the workers to judge the actual height of the concrete. This is not only greatly affected by factors such as the flatness of the concrete surface and the lighting conditions of the working environment, but also suffers from low accuracy and a large error range. Summary of the Invention

[0003] This application provides a device and method for detecting the thickness of concrete slabs, which can be applied to the detection of the thickness of different concrete slabs.

[0004] Specifically, this application is implemented through the following technical solution: One aspect of this application provides a concrete slab thickness detection device, comprising: First rod; The second rod is telescopically mounted at the lower end of the first rod; An adjustment component, connecting the first rod and the second rod, is used to adjust the length of the second rod extending beyond the bottom of the first rod according to the design thickness of the concrete to be measured; The probe is fixed to the lower end of the first rod and extends along the extension and retraction direction of the second rod; The lower end of the second rod is provided with a first annular electrode, and the probe is provided with a plurality of second annular electrodes at axial intervals. The first annular electrode is electrically connected to one pole of the power supply, and the plurality of second annular electrodes are all connected to the other pole of the power supply and electrically connected to the detection module. In use, the first annular electrode is inserted into the uncured concrete to be tested along with the second rod. The detection module identifies the current on / off state of multiple second annular electrodes, determines the position of the second annular electrode corresponding to the concrete surface, and obtains the actual thickness of the concrete slab.

[0005] Optionally, the adjustment component includes: The first transmission rod is radially inserted through the first rod body and extends into the second rod body; The second rod body has an axially extending long groove, and one side of the inner wall of the long groove has an axially extending long strip tooth. The first transmission rod has annular teeth on the rod segment located in the long groove; The annular teeth and the elongated teeth mesh with each other, and rotating the first transmission rod can drive the second rod to extend or retract along the axial direction of the first rod.

[0006] Optionally, the probe includes: The housing has multiple electrode windows spaced apart along the axial direction; The inner core is fixedly disposed within the housing; Multiple second annular electrodes are fixed to the inner core and extend from their respective electrode windows to be exposed outside the housing.

[0007] Optionally, two probes are symmetrically arranged at the lower end of the first rod; Each of the probes is provided with a plurality of second annular electrodes spaced apart along the axial direction; The tilt state of the uncured concrete surface is determined by comparing the height of the highest point of the second annular electrode in the conductive state on the two probes.

[0008] Optionally, a circular base is fixedly installed at the bottom of the first rod. The diameter of the circular base is larger than the diameter of the first rod. A pressure sensor is installed on the lower surface of the circular base and is electrically connected to the detection module to detect whether the rod has touched the bottom.

[0009] Another aspect of this application provides a method for detecting the thickness of a concrete slab, using the aforementioned concrete slab thickness detection device, comprising: S1. Based on the design thickness of the concrete to be measured, adjust the length of the second rod extending beyond the bottom of the first rod to be equal to the design thickness. S2. Insert the detection device into the uncured concrete to be tested, so that the first annular electrode is immersed in the uncured concrete to be tested. S3. The detection module detects the continuity between the first annular electrode and each of the second annular electrodes, and determines the actual height information of the concrete to be detected based on the position of the highest second annular electrode in the continuity state.

[0010] Optionally, in step 3, determining the actual height information of the concrete to be tested includes: The position of the bottom end of the first rod corresponding horizontally to the probe is used as the reference zero point; By identifying the highest-positioned second annular electrode in the conductive state, the position of the highest-positioned second annular electrode relative to the reference zero point is obtained, and the actual height information of the concrete to be tested is determined.

[0011] Optionally, two probes are symmetrically arranged at the lower end of the first rod of the detection device, and each probe is provided with the plurality of second annular electrodes spaced apart along the axial direction; The detection method further includes: determining the position of the second annular electrode at the highest position of the two probes in the conductive state, so as to obtain the height of the two measuring points of the concrete to be tested; The tilt angle of the concrete surface to be tested is obtained based on the height difference between the two measurement points and the fixed horizontal distance between the two probes.

[0012] Optionally, a circular base is fixedly installed at the bottom of the first rod of the detection device. The diameter of the circular base is larger than the diameter of the first rod. A pressure sensor is installed on the lower surface of the circular base and is electrically connected to the detection module to detect whether the bottom has been touched. In the detection method, step S2 includes: The detection device is inserted into the uncured concrete to be tested to obtain the pressure value detected by the pressure sensor; When the pressure value suddenly changes and exceeds the preset threshold, it is determined that the circular base has contacted the bottom surface of the template and the insertion is stopped.

[0013] This application provides a concrete slab thickness detection device and method. The adjustable range of the second rod in this application allows the detection device to adapt to the slab thickness measurement needs of most building structural layers. During the insertion of the device into the uncured concrete, as the device moves vertically downwards, the first annular electrode at the lower end of the second rod is immersed in the concrete. Simultaneously, due to the downward extension design of the probe, a portion of its length is also immersed in the concrete. Based on the conductivity of the uncured concrete, the first annular electrode and the second annular electrode on the probe immersed in the concrete form a closed circuit through the concrete medium. The detection module can accurately locate the concrete surface height by locking the highest conductive second annular electrode. This detection device provides reliable data support for precise control of concrete slab thickness. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a concrete slab thickness detection device shown in an exemplary embodiment of this application; Figure 2 This is a partial enlarged view of a concrete slab thickness detection device illustrated in an exemplary embodiment of this application; Figure 3 This is a side cross-sectional view of the adjustment component shown in an exemplary embodiment of this application; Figure 4 This is a front cross-sectional view of the adjustment component shown in an exemplary embodiment of this application; Figure 5 This is a partial schematic diagram of a probe shown in an exemplary embodiment of this application; Figure 6 This is a radial cross-sectional view of the probe shown in an exemplary embodiment of this application; Figure 7 This is a schematic diagram of the lower end of the first rod shown in an exemplary embodiment of this application; Figure 8 This is an exemplary embodiment of the present application illustrating a flowchart of a method for detecting the thickness of a concrete slab.

[0015] Wherein: 100, first rod body; 110, circular base; 200, second rod body; 210, first annular electrode; 220, long groove; 221, long toothed strip; 300, adjustment component; 310, first transmission rod; 311, annular toothed strip; 400, probe; 410, second annular electrode; 420, housing; 421, electrode window; 430, inner core. Detailed Implementation

[0016] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0017] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0018] refer to Figure 1 , Figure 2 and Figure 5This application provides a concrete slab thickness detection device, including: a first rod 100, a second rod 200, an adjustment assembly 300, and a probe 400. The second rod 200 is telescopically disposed at the lower end of the first rod 100. An adjustment component 300 connects a first rod 100 and a second rod 200, and is used to adjust the length of the second rod 200 extending beyond the bottom of the first rod 100 according to the designed thickness of the concrete to be tested. A probe 400 is fixed to the lower end of the first rod 100 and extends along the extension and retraction direction of the second rod 200. A first annular electrode 210 is provided at the lower end of the second rod 200, and multiple second annular electrodes 410 are axially spaced on the probe 400. The first annular electrode 210 is electrically connected to one pole of a power supply, and the multiple second annular electrodes 410 are all connected to the other pole of the power supply and electrically connected to the detection module. In use, the first annular electrode 210 is used to extend into the uncured concrete to be tested along with the second rod 200. The detection module identifies the current on / off state of the multiple second annular electrodes 410, determines the position of the second annular electrode 410 corresponding to the concrete surface, and obtains the actual thickness of the concrete slab.

[0019] The extension length of the second rod 200 can be flexibly adjusted within the range of 0-70cm to accommodate the measurement needs of concrete slabs of different thicknesses within this range, eliminating the need for separate measuring tools for single slab thicknesses. The probe 400 can be set to approximately 10cm in length. Because it extends downwards along the extension direction of the second rod 200, when the device is inserted into the uncured concrete, part of the probe 400 will inevitably be immersed in the concrete, ensuring stable contact and avoiding detection errors caused by poor contact. The first annular electrode 210 and multiple second annular electrodes 410 can also be connected to two power supplies respectively, forming a closed circuit through the uncured concrete. This allows the detection module to detect the current flow, thereby completing the concrete height identification. The power supply configuration can be flexibly selected according to the actual construction scenario's requirements.

[0020] The second rod has an adjustable range of 200mm. The detection device of this application can be adapted to the plate thickness measurement needs of most building structural layers, completely replacing the traditional fixed welded inserts. There is no need to make special tools for different plate thicknesses, which reduces the waste of steel raw materials, avoids the cumbersome process of carrying multiple sizes of tools during construction, simplifies the work preparation process, and significantly improves the ease of operation.

[0021] During the insertion of the device into the uncured concrete, as the device moves vertically downward, the first annular electrode 210 at the lower end of the second rod 200 is immersed in the concrete along with the rod. At the same time, due to the downward extension design of the probe 400, a portion of it will inevitably be immersed in the concrete. At this time, based on the conductivity of the uncured concrete, the first annular electrode 210 and the second annular electrode 410 on the probe 400 immersed in the concrete form a closed circuit through the concrete medium. If a single power supply connection is used, the current flows from one pole of the power supply through the first annular electrode 210 into the concrete, and then back to the other pole of the power supply through the second annular electrode 410 at the corresponding height. The detection module simultaneously captures the current on / off signals of each second annular electrode 410. If a dual power supply connection is used, the two power supplies are connected to the first annular electrode 210 and the second annular electrode 410 respectively. The concrete acts as a conductive medium to make the circuit conductive, and the detection module can also identify the current signal. Moreover, as the height of the concrete surface changes, the position of the second annular electrode 410 on the probe 400 in the conductive state will also change accordingly. By locking the highest conductive second annular electrode 410, the detection module can accurately locate the height of the concrete surface.

[0022] This detection device completely eliminates manual visual inspection and tactile judgment, and completely eliminates the interference of subjective and environmental factors such as light intensity, concrete surface flatness, and operator experience. It significantly reduces measurement errors, provides reliable data support for precise control of concrete slab thickness, and effectively avoids quality hazards such as insufficient structural bearing capacity, cracking, and leakage caused by slab thickness deviation.

[0023] In one embodiment, reference Figure 3 and Figure 4 The adjusting assembly 300 includes: a first transmission rod 310, which radially passes through a first rod body 100 and extends into a second rod body 200; a long groove 220 is formed along the axial direction of the second rod body 200, and an axially extending elongated tooth 221 is provided on the inner wall of one side of the long groove 220; annular teeth 311 are provided on the rod section of the first transmission rod 310 located in the long groove 220; wherein, the annular teeth 311 and the elongated teeth 221 mesh with each other, and rotating the first transmission rod 310 can drive the second rod body 200 to extend or retract along the axial direction of the first rod body 100. Specifically, the first transmission rod 310 is rotatably fixed to the cylindrical wall of the first rod body 100 by bearings, which ensures both the flexibility of rotation of the first transmission rod 310 and stable positioning. The meshing teeth can be designed with a fine tooth structure with a module of 0.5-1mm, and with the densely arranged teeth, millimeter-level telescopic adjustment can be achieved to precisely match the design requirements of different plate thicknesses.

[0024] refer to Figure 5 and Figure 6In one embodiment, the probe 400 includes: a housing 420 having a plurality of electrode windows 421 spaced apart along the axial direction; an inner core 430 fixedly disposed inside the housing 420; and a plurality of second annular electrodes 410 fixed on the inner core 430 and extending out from the corresponding electrode windows 421 to be exposed outside the housing 420.

[0025] The housing 420 is made of wear-resistant insulating material, and the edges of the electrode window 421 are rounded to avoid scratching the second annular electrode 410. Simultaneously, the window size is precisely matched to the second annular electrode 410 to ensure a tight fit and no loosening or displacement after the electrode is extended. The inner core 430 is fixedly embedded within the housing 420, serving as the core mounting base for the second annular electrode 410. It is made of high-strength insulating material, which can be a high-strength material with an insulating coating. The inner core 430 has a large diameter and excellent compressive and bending strength. When inserted into uncured concrete, it can withstand soil resistance and external impacts, maintaining a vertical posture without deformation.

[0026] The first annular electrode 210 has only its annular end face exposed to the concrete, while the rest of the electrode and the connection with the second rod 200 are wrapped with an insulating sleeve. Other areas of the second rod 200 are coated with an insulating layer. The second annular electrode 410 has only the part extending out of the electrode window 421 exposed, and the connection with the inner core 430 is sealed with insulating glue. The inner core 430 and the shell 420 between adjacent electrodes are treated with basic insulation to form an effective insulation barrier.

[0027] Combination Figure 7 In one embodiment, two probes 400 are symmetrically arranged at the lower end of the first rod 100; each probe 400 is provided with multiple second annular electrodes 410 spaced apart along the axial direction; by comparing the height of the highest second annular electrode 410 in the conductive state on the two probes 400, the tilt state of the uncured concrete surface can be determined. The two symmetrically arranged probes 400 can simultaneously acquire the height data of two measuring points on the concrete surface. By comparing the heights of the highest conductive electrodes, it is possible to quickly and intuitively determine whether the concrete surface is tilted, providing a clear basis for subsequent leveling operations. Based on the tilt determination result, workers can selectively scrape away high areas of the concrete and add material to low areas, avoiding blind leveling and improving leveling efficiency and accuracy.

[0028] In one embodiment, combined with Figure 2A circular base 110 is fixedly installed at the bottom of the first rod 100. The diameter of the circular base 110 is larger than that of the first rod 100. A pressure sensor is installed on the lower surface of the circular base 110 and is electrically connected to the detection module to detect whether the device has touched the bottom. The larger diameter of the circular base 110 increases the contact area between the device and the bottom surface of the template, making the device more stable and preventing it from tipping over during insertion. The pressure sensor, electrically connected to the detection module, can automatically identify whether the device has touched the bottom without manual judgment. This solves the problems of inaccurate visual inspection of the bottom position and the influence of insertion depth or shallowness on the detection results. The bottom-touching detection function helps workers quickly locate the bottom surface of the template, ensuring the stability of the bottom position of the first rod 100. This provides a benchmark for subsequent thickness calculations using the bottom of the first rod 100 as a reference, improving the consistency and accuracy of the detection results.

[0029] refer to Figure 8 Another aspect of this application provides a method for detecting the thickness of a concrete slab, using the aforementioned concrete slab thickness detection device, comprising: S1. Based on the design thickness of the concrete to be measured, adjust the length of the second rod 200 extending beyond the bottom of the first rod 100 to be equal to the design thickness. S2. Insert the testing device into the uncured concrete to be tested, so that the first annular electrode 210 is immersed in the uncured concrete to be tested. S3. The detection module detects the on / off state between the first annular electrode 210 and each of the second annular electrodes 410, and determines the actual height information of the concrete to be detected based on the position of the highest second annular electrode 410 in the on state.

[0030] The system automates plate thickness detection by adjusting rod length, inserting the device, and detecting on / off signals. It is simple and easy to operate, suitable for workers of varying skill levels. The detection module determines the actual height by identifying the position of the highest conductive electrode, directly outputting the specific height value. It can also compare the actual height with the design thickness, visually displaying the deviation between the actual and design values ​​(too high or too low), eliminating the need for workers to perform additional calculations. With wireless signal transmission, the detection data can be transmitted to a monitor in real time for remote viewing by workers or foremen. This avoids workers having to bend down close to uncured concrete to check data, improving operational safety and allowing managers to simultaneously monitor construction quality for efficient control.

[0031] In one embodiment, step 3, determining the actual height information of the concrete to be tested, includes: taking the position of the bottom end of the first rod 100 horizontally corresponding to the position on the probe 400 as a reference zero point; and obtaining the position of the highest second annular electrode 410 relative to the reference zero point by identifying the highest second annular electrode 410 in the conducting state, thereby determining the actual height information of the concrete to be tested.

[0032] This embodiment explicitly uses the position of the probe 400 at the bottom of the first rod 100 as the reference zero point. This zero point also corresponds to the highest point of the designed concrete thickness, making the calculation process simple and direct. Based on a unified zero point, the positive and negative deviations of the actual height relative to the design value can be directly displayed. Higher than the zero point is positive, and lower is negative. Workers can intuitively know whether the concrete pouring height meets the standard, facilitating timely adjustments.

[0033] In one embodiment, two probes 400 are symmetrically arranged at the lower end of the first rod 100 of the detection device, and a plurality of second annular electrodes 410 are arranged axially at intervals on each probe 400; the detection method further includes: determining the position of the highest second annular electrode 410 in the conducting state on the two probes 400 respectively, to obtain the height of the two measuring points of the concrete to be tested; and obtaining the tilt angle of the surface of the concrete to be tested based on the height difference between the two measuring points and the fixed horizontal distance between the two probes 400.

[0034] This embodiment uses the height data of the dual probes 400 and a fixed horizontal spacing to calculate the tilt angle of the concrete surface using trigonometric functions, achieving quantitative detection of the tilt state. Compared to simply determining whether it is tilted, this provides more accurate data support for leveling operations. Furthermore, more probes 400 can be added in the circumferential direction of the first rod 100 to acquire height data from multiple measurement points on the concrete surface. By constructing a more specific surface tilt model using multiple sets of data, workers can develop targeted leveling plans, improve leveling accuracy, reduce concrete material waste, and ensure that the flatness of the slab meets design requirements.

[0035] In one embodiment, a circular base 110 is fixedly installed at the bottom of the first rod 100 of the detection device. The diameter of the circular base 110 is larger than the diameter of the first rod 100. A pressure sensor is installed on the lower surface of the circular base 110 and is electrically connected to the detection module to detect whether it has touched the bottom. In the detection method, step S2 includes: inserting the detection device into the uncured concrete to be tested and obtaining the pressure value detected by the pressure sensor; when the pressure value changes abruptly and exceeds a preset threshold, it is determined that the circular base 110 has contacted the bottom surface of the template and the insertion is stopped.

[0036] This embodiment uses a pressure sensor to collect pressure values ​​in real time. Utilizing the characteristic that the pressure value changes abruptly due to the reaction force generated on the bottom surface of the template upon contact with the bottom, it achieves automatic bottom contact determination with high accuracy, avoiding errors from subjective human judgment. A preset pressure threshold can be adapted to the load-bearing characteristics of different template materials, preventing inaccurate bottom contact determination due to variations in template material. When the pressure value exceeds the threshold, it automatically prompts and stops insertion, preventing damage to the template due to excessive insertion or displacement of the detection benchmark due to insufficient insertion. This protects the construction template, ensures the accuracy of the detection benchmark, reduces the workload of manual monitoring of the insertion process, and improves work efficiency.

[0037] It should be noted that the technical solutions or features described in the above embodiments can be combined or complemented by each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A concrete slab thickness detection device, characterized by, The utility model relates to a kind of concrete plate thickness detection device, including: First rod body (100); Second rod body (200), it is telescopically arranged in the lower end of the first rod body (100); Adjusting assembly (300), the first rod body (100) is connected with the second rod body (200), for the length of the second rod body (200) according to the design thickness of the concrete to be measured is adjusted to extend the bottom end of the first rod body (100); Probe (400), fixed in the lower end of the first rod body (100), and extend along the telescopic direction of the second rod body (200); The lower end of the second rod body (200) is equipped with first annular electrode (210), the axial interval of the probe (400) is equipped with multiple second annular electrode (410), the first annular electrode (210) is electrically connected with one pole of power supply, and multiple second annular electrode (410) is connected with the other pole of power supply and is electrically connected with detection module; Wherein, in use state, the first annular electrode (210) is used for with the second rod body (200) is inserted into the concrete to be measured that has not solidified, the current on-off state of multiple second annular electrode (410) is identified by the detection module, the position of the second annular electrode (410) corresponding to the concrete surface is determined, and the actual thickness of the concrete plate is obtained.

2. The concrete slab thickness detection apparatus according to claim 1, wherein The adjusting assembly (300) includes: First transmission rod (310), it is radially arranged in the first rod body (100) and extends into the second rod body (200); The long slot (220) is opened in the axial direction on the second rod body (200), and the inner wall of one side of the long slot (220) is equipped with the axially extending long strip tooth (221); The ring tooth (311) is arranged on the rod segment of the first transmission rod (310) in the long slot (220); Wherein, the ring tooth (311) and the long strip tooth (221) are engaged with each other, and the first transmission rod (310) can be driven to drive the second rod body (200) to extend or retract along the axial direction of the first rod body (100) by rotating.

3. The concrete slab thickness detection apparatus of claim 1, wherein The probe (400) includes: Shell (420), multiple electrode windows (421) are arranged at intervals in the axial direction; Inner core (430), fixedly arranged in the shell (420); Multiple second annular electrode (410) is fixed on the inner core (430), and respectively extends from the corresponding electrode window (421) to expose outside the shell (420).

4. The concrete slab thickness detection apparatus of claim 1, wherein The lower end of the first rod body (100) is symmetrically equipped with two probes (400); Multiple second annular electrode (410) is arranged at intervals in the axial direction on each probe (400); By comparing the height of the highest position second annular electrode (410) in the on state of two probes (400), the inclination state of the un-solidified concrete surface is judged.

5. The apparatus for detecting the thickness of a concrete slab as defined in claim 1, wherein The bottom of the first rod body (100) is fixedly provided with a circular base (110), the diameter of the circular base (110) is greater than that of the first rod body (100), and a pressure sensor is arranged on the lower surface of the circular base (110) and electrically connected with the detection module, and is used for detecting whether the bottom is touched.

6. A method of detecting the thickness of a concrete slab, characterized by, The concrete plate thickness detection device of claim 1 is used for detection, comprising: S1, adjusting the length of the second rod body (200) protruding from the bottom end of the first rod body (100) to be equal to the design thickness of the to-be-detected concrete according to the design thickness of the to-be-detected concrete; S2, inserting the detection device into the un-solidified to-be-detected concrete, so that the first annular electrode (210) is immersed in the un-solidified to-be-detected concrete; S3, detecting the on-off state between the first annular electrode (210) and each second annular electrode (410) through the detection module, and determining the actual height information of the to-be-detected concrete according to the position of the highest second annular electrode (410) in the on state.

7. The method for detecting the thickness of concrete slabs as described in claim 6, characterized in that, In step 3, the actual height information of the to-be-detected concrete is determined, comprising: Taking the position on the probe (400) corresponding to the horizontal bottom end of the first rod body (100) as a reference zero point; By identifying the highest second annular electrode (410) in the on state, the position of the highest second annular electrode (410) relative to the reference zero point is obtained, and the actual height information of the to-be-detected concrete is determined.

8. The method for detecting the thickness of concrete slabs as described in claim 6, characterized in that, The lower end of the first rod body (100) of the detection device is symmetrically provided with two probes (400), and the plurality of second annular electrodes (410) are arranged on each probe (400) in an axial direction. The detection method further comprises: determining the positions of the highest second annular electrodes (410) in the on state on the two probes (400) respectively, to obtain the heights of two measurement points of the to-be-detected concrete; According to the height difference between the two measurement points and the fixed horizontal distance between the two probes (400), the inclination angle of the surface of the to-be-detected concrete is obtained.

9. The method for detecting the thickness of concrete slabs as described in claim 6, characterized in that, The bottom of the first rod body (100) of the detection device is fixedly provided with a circular base (110), the diameter of the circular base (110) is greater than that of the first rod body (100), and a pressure sensor is arranged on the lower surface of the circular base (110) and electrically connected with the detection module, and is used for detecting whether the bottom is touched; In the detection method, the step S2 comprises: Inserting the detection device into the un-solidified to-be-detected concrete to obtain the pressure value detected by the pressure sensor; When the pressure value suddenly changes and exceeds a preset threshold value, it is determined that the circular base (110) has contacted the bottom surface of the formwork, and the insertion is stopped.

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