Concrete slab thickness detection device

Abstract

The invention belongs to the technical field of detection equipment, and discloses a concrete slab thickness detection device which is technically characterized in that the concrete slab thickness detection device comprises a workbench, two groups of oppositely distributed vertical plates are fixedly mounted on the surface of the workbench, a slab body is placed between the two groups of vertical plates, and a conveying mechanism matched with the slab body is arranged between the two groups of vertical plates; the conveying mechanism comprises a conveying roller and a driving assembly, a detection mechanism matched with the plate body is arranged between the two sets of vertical plates, and the detection mechanism comprises an upper detection wheel, a lower detection wheel, a positioning assembly and a double-face detection assembly. The relative positions of the upper detection wheel and the lower detection wheel can be adjusted in real time on the upper surface and the lower surface of the plate body, the thickness change amplitude of the plate body is reflected through the movement amplitude of the upper detection wheel and the lower detection wheel in the vertical direction, the thickness of the plate body can be monitored in all directions from the upper surface and the lower surface of the plate body, and the thickness detection precision of the plate body is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and particularly to a concrete slab thickness detection device. Background Art

[0002] In construction projects, it is necessary to detect the project quality. Among them, the detection of the concrete thickness is a part of the project detection and acceptance. A relatively common measurement method is to drill holes on the floor slab. First, drill holes in the floor slab with a drill bit, and then pass the concrete slab thickness detection device through the holes for measurement.

[0003] Another detection device for the concrete slab thickness includes a measuring rod, a cursor slidably sleeved on the measuring rod, and a clamping plate fixedly connected to the bottom of the measuring rod. When measuring, the clamping plate is abutted against the surface of the concrete slab, and then the measuring rod is slid, and the thickness of the concrete slab is measured by the corresponding values of the cursor and the measuring rod.

[0004] This detection method of drilling holes is relatively complex and cannot perform multiple drilling detections on the surface of the concrete slab. When using this detection method of the measuring rod, it can only be detected along the edge position of the concrete slab, and cannot perform omnidirectional thickness detection on the surface of the concrete slab. Moreover, during the detection, the concavities and convexities on the upper and lower surfaces of the concrete slab cannot be synchronously detected, and the detection accuracy is relatively low and the error is relatively large. Summary of the Invention

[0005] The purpose of the present invention is to provide a concrete slab thickness detection device to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A concrete slab thickness detection device includes a workbench. Two groups of vertically arranged plates are fixedly installed on the surface of the workbench. A plate body is placed between the two groups of vertically arranged plates. A conveying mechanism cooperating with the plate body is arranged between the two groups of vertically arranged plates. The conveying mechanism includes conveying rollers and a driving component. A plurality of conveying rollers are arranged and distributed in parallel between the two groups of vertically arranged plates. The driving component is connected to the conveying rollers and is used to control the rotation of the plurality of conveying rollers. A detection mechanism cooperating with the plate body is arranged between the two groups of vertically arranged plates. The detection mechanism includes an upper detection wheel, a lower detection wheel, a positioning component and a double-sided detection component. A plurality of upper detection wheels and lower detection wheels are arranged and are respectively located on the upper and lower sides of the plate body. The positioning component is located between the two groups of vertically arranged plates and is respectively connected to the upper detection wheel and the lower detection wheel. The positioning component is used to control the plurality of upper detection wheels and lower detection wheels to be distributed in an inclined state along the width direction of the plate body. The double-sided detection component is connected to the positioning component. When the upper detection wheel and the lower detection wheel are respectively in contact with the upper and lower surfaces of the plate body, the positioning component monitors the thickness error of the plate body in an all-round way by cooperating with the double-sided detection component.

[0007] As a further solution of the present invention: The driving assembly includes a plurality of rotating columns rotatably installed between two vertical plates. The conveying rollers are fixedly installed on the surfaces of the rotating columns. Synchronous gear discs are fixedly installed on the surfaces of the rotating columns. A synchronous belt connects a plurality of synchronous gear discs together. One end of a rotating column extends outside the vertical plate and is connected to a motor.

[0008] As a further solution of the present invention: The positioning assembly includes a plurality of cross plates fixedly installed between two vertical plates. Upper positioning cylinders are respectively fixedly installed on the bottom walls of the plurality of cross plates. The plurality of upper positioning cylinders are distributed in an inclined state along the width direction of the plate body. Upper telescopic rods are slidably installed in the upper positioning cylinders. The bottom ends of the upper telescopic rods extend outside the upper positioning cylinders and are rotatably connected to upper detection wheels. A plurality of lower positioning cylinders opposite to the upper positioning cylinders are fixedly installed on the surface of the workbench. Lower telescopic rods are slidably installed in the lower positioning cylinders. The top ends of the lower telescopic rods extend outside the lower positioning cylinders and are rotatably connected to lower detection wheels. Compression springs are respectively fixedly installed in the upper positioning cylinders and the lower positioning cylinders. The telescopic ends of the compression springs are respectively connected to the upper telescopic rods and the lower telescopic rods.

[0009] As a further solution of the present invention: The double-sided detection assembly includes an upper connecting rod fixedly installed on the side wall of the upper telescopic rod. The end of the upper connecting rod far from the upper telescopic rod is fixedly installed with an upper detection block. A lower connecting rod is fixedly installed on the side wall of the lower telescopic rod. The end of the lower connecting rod far from the lower telescopic rod is fixedly installed with a lower detection block located directly below the upper detection block. A first vertical rod is fixedly installed on the surface of the lower detection block. The top end of the first vertical rod is fixedly installed with a lower pressure sensor located below the upper detection block. A second vertical rod is fixedly installed on the surface of the lower detection block. The top end of the second vertical rod passes through the upper detection block and extends above the upper detection block and is fixedly installed with an upper pressure sensor. The gap between the upper detection block and the upper pressure sensor is the qualified error range for the excess of the plate body thickness. The gap between the upper detection block and the lower pressure sensor is the qualified error range for the reduction of the plate body thickness.

[0010] As a further solution of the present invention: A controller is installed in the lower detection block. The upper pressure sensor and the lower pressure sensor are respectively electrically connected to the controller. An alarm is fixedly installed on the bottom wall of the lower detection block. The alarm is electrically connected to the controller.

[0011] As a further solution of the present invention: An electric cylinder is fixedly installed on the side wall of the upper telescopic rod. The electric cylinder is electrically connected to the controller. A marking pen is fixedly installed at the telescopic end of the electric cylinder.

[0012] As a further solution of the present invention: limiting grooves are respectively formed on the inner side walls of the upper positioning cylinder and the lower positioning cylinder, limiting blocks are respectively fixedly installed on the side walls of the upper telescopic rod and the lower telescopic rod, and the limiting blocks are slidably connected with the limiting grooves in the vertical direction.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: by arranging the positioning assembly and the double-sided detection assembly to cooperate with each other, the relative positions of the upper detection wheel and the lower detection wheel can be adjusted in real time on the upper and lower surfaces of the plate body. The change amplitude of the thickness of the plate body is reflected by the moving amplitude of the upper detection wheel and the lower detection wheel in the vertical direction. The thickness of the plate body can be monitored comprehensively from the upper and lower sides of the plate body, effectively improving the thickness detection accuracy of the plate body. It solves the problems that at present, it can only be detected along the edge position of the concrete slab, the thickness of the surface of the concrete slab cannot be detected comprehensively, and the concavities and convexities on the upper and lower surfaces of the concrete slab cannot be synchronously detected during the detection, resulting in low detection accuracy and large errors. Description of the Drawings

[0014] Figure 1 It is a three-dimensional structural schematic diagram of a concrete slab thickness detection device provided in an embodiment of the present invention.

[0015] Figure 2 It is a front view structural schematic diagram of a concrete slab thickness detection device provided in an embodiment of the present invention.

[0016] Figure 3 It is a schematic diagram of the plate body and its connection structure in a concrete slab thickness detection device provided in an embodiment of the present invention.

[0017] Figure 4 It is a schematic diagram of the upper detection wheel, the lower detection wheel and their connection structure in a concrete slab thickness detection device provided in an embodiment of the present invention.

[0018] Figure 5 It is a schematic diagram of the internal structure of the upper positioning cylinder in a concrete slab thickness detection device provided in an embodiment of the present invention.

[0019] Wherein: 1 - workbench, 2 - vertical plate, 3 - plate body, 4 - conveying mechanism, 41 - conveying roller, 42 - driving assembly, 421 - rotating column, 422 - synchronous gear disc, 423 - synchronous belt, 424 - motor, 5 - detection mechanism, 51 - upper detection wheel, 52 - lower detection wheel, 53 - positioning assembly, 531 - upper positioning cylinder, 532 - upper telescopic rod, 533 - lower positioning cylinder, 534 - lower telescopic rod, 535 - compression spring, 536 - cross plate, 54 - double-sided detection assembly, 541 - upper connecting rod, 542 - upper detection block, 543 - lower connecting rod, 544 - lower detection block, 545 - first vertical rod, 546 - lower pressure sensor, 547 - second vertical rod, 548 - upper pressure sensor, 6 - controller, 7 - alarm, 8 - electric cylinder, 9 - marker pen, 10 - limit groove, 11 - limit block. Detailed implementation manners

[0020] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0021] The following describes in detail the specific implementation of the present invention in combination with specific embodiments.

[0022] As Figure 1 、 Figure 2 shown, a structure diagram of a concrete slab thickness detection device provided by an embodiment of the present invention includes a workbench 1. Two groups of oppositely distributed vertical plates 2 are fixedly installed on the surface of the workbench 1. A plate body 3 is placed between the two groups of vertical plates 2. A conveying mechanism 4 cooperating with the plate body 3 is arranged between the two groups of vertical plates 2. The conveying mechanism 4 includes a conveying roller 41 and a driving assembly 42. Multiple groups of conveying rollers 41 are provided and are arranged side by side between the two groups of vertical plates 2. The driving assembly 42 is connected to the conveying roller 41, and the driving assembly 42 is used to control the rotation of multiple groups of conveying rollers 41. A detection mechanism 5 cooperating with the plate body 3 is arranged between the two groups of vertical plates 2. The detection mechanism 5 includes an upper detection wheel 51, a lower detection wheel 52, a positioning assembly 53 and a double-sided detection assembly 54. Multiple groups of upper detection wheels 51 and lower detection wheels 52 are provided and are respectively located on the upper and lower sides of the body 3. The positioning assembly 53 is located between the two groups of vertical plates 2 and is respectively connected to the upper detection wheel 51 and the lower detection wheel 52. The positioning assembly 53 is used to control multiple groups of upper detection wheels 51 and lower detection wheels 52 to be distributed in an inclined state along the width direction of the plate body 3. The double-sided detection assembly 54 is connected to the positioning assembly 53. When the upper detection wheel 51 and the lower detection wheel 52 are respectively in contact with the upper and lower surfaces of the plate body 3, the positioning assembly 53 monitors the thickness error of the plate body 3 in all directions by cooperating with the double-sided detection assembly 54.

[0023] During the production and processing of the plate body 3, a batch of plate bodies 3 are sequentially placed on the surface of the conveying rollers 41. The driving assembly 42 controls the rotation of multiple groups of conveying rollers 41 to push the plate body 3 to move between the two vertical plates 2. When the plate body 3 is moving, the positioning assembly 53 supports and positions the upper detection wheels 51 and the lower detection wheels 52. Multiple groups of upper detection wheels 51 roll along the upper surface of the plate body 3, and multiple groups of lower detection wheels 52 roll along the lower surface of the plate body 3. When the thickness of the upper and lower surfaces of the plate body 3 changes, the upper detection wheels 51 and the lower detection wheels 52 are synchronously fine-tuned in the vertical direction. Multiple groups of upper detection wheels 51 and lower detection wheels 52 are arranged side by side in the width direction of the plate body 3, and the thickness of the plate body 3 can be detected comprehensively. When the thickness of the plate body 3 increases beyond the qualified range or decreases beyond the qualified range, the double-sided detection assembly 54 can issue a warning signal in real time.

[0024] As Figure 1 , Figure 2 , Figure 3 shown, as a preferred embodiment of the present invention, the driving assembly 42 includes multiple rotating columns 421 rotatably installed between the two vertical plates 2. The conveying roller 41 is fixedly installed on the surface of the rotating column 421. A synchronous gear disk 422 is fixedly installed on the surface of the rotating column 421. Multiple synchronous gear disks 422 are commonly connected with a synchronous belt 423. One end of a group of rotating columns 421 extends outside the vertical plate 2 and is connected with a motor 424.

[0025] The plate body 3 is placed on the surface of the conveying roller 41. The motor 424 drives a group of rotating columns 421 to rotate, thereby driving the synchronous gear disks 422 to rotate synchronously. Multiple synchronous gear disks 422 cooperate with the synchronous belt 423 to drive multiple groups of rotating columns 421 to rotate synchronously. The rotating columns 421 drive the conveying rollers 41 to rotate synchronously, and the conveying rollers 41 can conveniently push the plate body 3 to translate between the two vertical plates 2.

[0026] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, as a preferred embodiment of the present invention, the positioning assembly 53 includes multiple cross plates 536 fixedly installed between two vertical plates 2. Multiple bottom walls of the cross plates 536 are respectively fixedly installed with upper positioning cylinders 531. The multiple upper positioning cylinders 531 are distributed in an inclined state along the width direction of the plate body 3. An upper telescopic rod 532 is slidably installed in the upper positioning cylinder 531. The bottom end of the upper telescopic rod 532 extends outside the upper positioning cylinder 531 and is rotatably connected to the upper detection wheel 51. Multiple lower positioning cylinders 533 opposite to the upper positioning cylinders 531 are fixedly installed on the surface of the workbench 1. A lower telescopic rod 534 is slidably installed in the lower positioning cylinder 533. The top end of the lower telescopic rod 534 extends outside the lower positioning cylinder 533 and is rotatably connected to the lower detection wheel 52. Compression springs 535 are respectively fixedly installed in the upper positioning cylinder 531 and the lower positioning cylinder 533. The telescopic ends of the compression springs 535 are respectively connected to the upper telescopic rod 532 and the lower telescopic rod 534.

[0027] The upper positioning cylinder 531 and the upper telescopic rod 532 cooperate with each other to position the upper detection wheel 51, and the lower positioning cylinder 533 and the lower telescopic rod 534 match each other to position the lower detection wheel 52. The compression spring 535 applies a thrust to the upper telescopic rod 532 and the lower telescopic rod 534 so that the upper detection wheel 51 and the lower detection wheel 52 are respectively in contact with the upper and lower surfaces of the plate body 3. When the plate body 3 moves horizontally, the upper detection wheel 51 and the lower detection wheel 52 roll relatively along the surface of the body 3. When the thickness of the plate body 3 changes, the upper detection wheel 51, the upper telescopic rod 532, the lower detection wheel 52, and the lower telescopic rod 534 move synchronously in a small amplitude in the vertical direction. When the thickness change of the plate body 3 exceeds the qualified error range, the double-sided detection assembly 54 can send out a warning signal in real time.

[0028] As Figure 2 , Figure 3 , Figure 4As shown, as a preferred embodiment of the present invention, the double-sided detection component 54 includes an upper connecting rod 541 fixedly installed on the side wall of the upper telescopic rod 532. One end of the upper connecting rod 541 away from the upper telescopic rod 532 is fixedly installed with an upper detection block 542. The side wall of the lower telescopic rod 534 is fixedly installed with a lower connecting rod 543. One end of the lower connecting rod 543 away from the lower telescopic rod 534 is fixedly installed with a lower detection block 544 located directly below the upper detection block 542. A first vertical rod 545 is fixedly installed on the surface of the lower detection block 544. The top end of the first vertical rod 545 is fixedly installed with a lower pressure sensor 546 located below the upper detection block 542. A second vertical rod 547 is fixedly installed on the surface of the lower detection block 544. The top end of the second vertical rod 547 passes through the upper detection block 542 and extends above the upper detection block 542 and is fixedly installed with an upper pressure sensor 548. The gap between the upper detection block 542 and the upper pressure sensor 548 is the qualified error range for the thickness of the plate body 3 to exceed. The gap between the upper detection block 542 and the lower pressure sensor 546 is the qualified error range for the thickness of the plate body 3 to decrease.

[0029] The upper telescopic rod 532 and the upper connecting rod 541 cooperate with each other to support and position the upper detection block 542. The lower telescopic rod 534 and the lower connecting rod 543 cooperate with each other to support and position the lower detection block 544. The first vertical rod 545 and the lower detection block 544 cooperate with each other to support and position the lower pressure sensor 546. The second vertical rod 547 and the lower detection block 544 cooperate with each other to support and position the upper pressure sensor 548. When the upper detection wheel 51 moves slightly in the vertical direction, the upper telescopic rod 532 and the upper connecting rod 541 cooperate with each other and can drive the upper detection block 542 to move synchronously in the vertical direction. When the lower detection wheel 52 moves slightly in the vertical direction, the lower telescopic rod 534 and the lower connecting rod 543 cooperate with each other and can drive the lower detection block 544 to move synchronously in the vertical direction. When the upper detection block 542 and the lower detection block 544 move in the vertical direction, the gap between the lower pressure sensor 546 and the upper pressure sensor 548 and the upper detection block 542 can be adjusted synchronously. When the thickness of a certain position of the plate body 3 is too thick beyond the qualified error range, the upper detection block 542 contacts the upper pressure sensor 548, and the upper detection block 542 exerts a thrust on the upper pressure sensor 548, and the upper pressure sensor 548 emits a signal for warning. When the thickness of a certain position of the plate body 3 is too thin beyond the qualified error range, the upper detection block 542 contacts the lower pressure sensor 546, and the upper detection block 542 exerts a thrust on the lower pressure sensor 546, and the lower pressure sensor emits a signal for warning.

[0030] As Figure 2 、 Figure 4As shown, as a preferred embodiment of the present invention, a controller 6 is installed inside the lower detection block 544, and the upper pressure sensor 548 and the lower pressure sensor 546 are electrically connected to the controller 6 respectively. An alarm 7 is fixedly installed on the bottom wall of the lower detection block 544, and the alarm 7 is electrically connected to the controller 6.

[0031] When the upper pressure sensor 548 or the lower pressure sensor 546 sends a pressure signal, the controller 6 controls the alarm 7 to send a warning signal, and the staff can understand the thickness change of the corresponding position of the plate body 3 in real time.

[0032] As Figure 2 、 Figure 4 As shown, as a preferred embodiment of the present invention, an electric cylinder 8 is fixedly installed on the side wall of the upper telescopic rod 532, the electric cylinder 8 is electrically connected to the controller 66, and a marking pen 9 is fixedly installed at the telescopic end of the electric cylinder 8.

[0033] When the controller 6 receives the electrical signal sent by the upper pressure sensor 548 or the lower pressure sensor 546, the controller 6 controls the electric cylinder 8 to start. The electric cylinder 8 pushes the marking pen 9 to move towards the plate body 3, and the marking pen 9 draws a mark at the corresponding position on the surface of the plate body 3, so that the staff can conveniently understand the position where the thickness of the plate body 3 is unqualified.

[0034] As Figure 4 、 Figure 5 As shown, as a preferred embodiment of the present invention, limiting grooves 10 are respectively formed on the inner side walls of the upper positioning cylinder 531 and the lower positioning cylinder 533, limiting blocks 11 are respectively fixedly installed on the side walls of the upper telescopic rod 532 and the lower telescopic rod 534, and the limiting blocks 11 are slidably connected to the limiting grooves 10 in the vertical direction.

[0035] When the upper telescopic rod 532 slides in the upper positioning cylinder 531 or the lower telescopic rod 534 slides in the lower positioning cylinder 533, the limiting blocks 11 slide synchronously in the limiting grooves 10, which can effectively improve the stability of the upper telescopic rod 532 and the lower telescopic rod 534.

[0036] The working principle of the present invention is as follows: the upper positioning cylinder 531 and the upper telescopic rod 532 cooperate with each other to position the upper detection wheel 51, and the lower positioning cylinder 533 and the lower telescopic rod 534 match each other to position the lower detection wheel 52. During the production and processing of the plate body 3, a batch of plate bodies 3 are sequentially placed on the surface of the conveying roller 41. The motor 424 drives a group of rotating columns 421 to rotate, thereby driving the synchronous gear disk 422 to rotate synchronously. Multiple groups of synchronous gear disks 422 and the synchronous belt 423 cooperate with each other to drive multiple groups of rotating columns 421 to rotate synchronously. The rotating columns 421 drive the conveying roller 41 to rotate synchronously, and the conveying roller 41 can conveniently push the plate body 3 to translate between the two vertical plates 2.

[0037] The extrusion spring 535 applies a thrust force to the upper telescopic rod 532 and the lower telescopic rod 534, so that the upper detection wheel 51 and the lower detection wheel 52 are respectively in contact with the upper and lower surfaces of the plate body 3. When the plate body 3 translates, the upper detection wheel 51 and the lower detection wheel 52 roll relatively along the surface of the body 3. When the thickness of the plate body 3 changes, the upper detection wheel 51, the upper telescopic rod 532, the lower detection wheel 52 and the lower telescopic rod 534 move synchronously in a small amplitude in the vertical direction. When the upper detection wheel 51 moves in a small amplitude in the vertical direction, the upper telescopic rod 532 and the upper connecting rod 541 cooperate with each other to drive the upper detection block 542 to move synchronously in the vertical direction. When the lower detection wheel 52 moves in a small amplitude in the vertical direction, the lower telescopic rod 534 and the lower connecting rod 543 cooperate with each other to drive the lower detection block 544 to move synchronously in the vertical direction. When the upper detection block 542 and the lower detection block 544 move in the vertical direction, the gap between the lower pressure sensor 546 and the upper detection block 542 and the upper pressure sensor 548 can be adjusted synchronously. When the thickness of a certain position of the plate body 3 exceeds the qualified error range, the upper detection block 542 contacts the upper pressure sensor 548, and the upper detection block 542 applies a thrust force to the upper pressure sensor 548, and the upper pressure sensor 548 emits a signal for warning. When the thickness of a certain position of the plate body 3 is thinner than the qualified error range, the upper detection block 542 contacts the lower pressure sensor 546, and the upper detection block 542 applies a thrust force to the lower pressure sensor 546, and the lower pressure sensor emits a signal for warning.

[0038] The above describes the preferred embodiments of the present invention in detail. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A device for detecting the thickness of a concrete slab, comprising a workbench, wherein two groups of vertically arranged plates are fixedly installed on the surface of the workbench and are distributed oppositely, and a slab is placed between the two groups of vertically arranged plates. It is characterized in that, A conveying mechanism that cooperates with the plate body is arranged between the two groups of vertical plates. The conveying mechanism includes conveying rollers and a driving component; A plurality of groups of the conveying rollers are arranged and distributed in parallel between the two groups of vertical plates. The driving component is connected to the conveying rollers, and the driving component is used to control the rotation of the plurality of groups of conveying rollers; A detection mechanism that cooperates with the plate body is arranged between the two groups of vertical plates. The detection mechanism includes an upper detection wheel, a lower detection wheel, a positioning component and a double-sided detection component; A plurality of groups of the upper detection wheels and the lower detection wheels are arranged and are respectively located on the upper and lower sides of the main body. The positioning component is located between the two groups of vertical plates and is respectively connected to the upper detection wheel and the lower detection wheel. The positioning component is used to control the plurality of groups of upper detection wheels and lower detection wheels to be distributed in an inclined state along the width direction of the plate body; The double-sided detection component is connected to the positioning component. When the upper detection wheel and the lower detection wheel are respectively in contact with the upper and lower surfaces of the plate body, the positioning component monitors the thickness error of the plate body in all directions by cooperating with the double-sided detection component.

2. The concrete slab thickness detection device according to claim 1, wherein, The driving component includes a plurality of rotating columns rotatably installed between the two groups of vertical plates. The conveying rollers are fixedly installed on the surface of the rotating columns. Synchronous tooth discs are fixedly installed on the surface of the rotating columns. The plurality of synchronous tooth discs are jointly connected by a synchronous belt. One end of a group of rotating columns extends to the outside of the vertical plate and is connected to a motor.

3. The thickness detection device for concrete slabs according to claim 1, wherein The positioning component includes a plurality of cross plates fixedly installed between the two groups of vertical plates. Upper positioning cylinders are respectively fixedly installed on the bottom walls of the plurality of cross plates. The plurality of upper positioning cylinders are distributed in an inclined state along the width direction of the plate body. An upper telescopic rod is slidably installed in the upper positioning cylinder. The bottom end of the upper telescopic rod extends to the outside of the upper positioning cylinder and is rotatably connected to the upper detection wheel. A plurality of lower positioning cylinders opposite to the upper positioning cylinders are fixedly installed on the surface of the workbench. A lower telescopic rod is slidably installed in the lower positioning cylinder. The top end of the lower telescopic rod extends to the outside of the lower positioning cylinder and is rotatably connected to the lower detection wheel. Compression springs are respectively fixedly installed in the upper positioning cylinder and the lower positioning cylinder. The telescopic ends of the compression springs are respectively connected to the upper telescopic rod and the lower telescopic rod.

4. The concrete slab thickness detection device according to claim 3, characterized in that, The double-sided detection component includes an upper connecting rod fixedly installed on the side wall of the upper telescopic rod. The upper detection block is fixedly installed at the end of the upper connecting rod far from the upper telescopic rod. A lower connecting rod is fixedly installed on the side wall of the lower telescopic rod. The lower detection block located directly below the upper detection block is fixedly installed at the end of the lower connecting rod far from the lower telescopic rod. A first vertical rod is fixedly installed on the surface of the lower detection block. The lower pressure sensor located below the upper detection block is fixedly installed at the top end of the first vertical rod. A second vertical rod is fixedly installed on the surface of the lower detection block. The top end of the second vertical rod passes through the upper detection block and extends above the upper detection block and is fixedly installed with an upper pressure sensor. The gap between the upper detection block and the upper pressure sensor is the qualified error range for the excess of the plate body thickness. The gap between the upper detection block and the lower pressure sensor is the qualified error range for the reduction of the plate body thickness.

5. The thickness detection device for a concrete slab according to claim 4, characterized in that, A controller is installed in the lower detection block. The upper pressure sensor and the lower pressure sensor are respectively electrically connected to the controller. An alarm is fixedly installed on the bottom wall of the lower detection block. The alarm is electrically connected to the controller.

6. The thickness detection device for a concrete slab according to claim 5, wherein, An electric cylinder is fixedly installed on the side wall of the upper telescopic rod. The electric cylinder is electrically connected to a controller, and a marking pen is fixedly installed at the telescopic end of the electric cylinder.

7. The concrete slab thickness detection device according to claim 3, wherein, Limiting grooves are respectively formed in the inner side walls of the upper positioning cylinder and the lower positioning cylinder. Limiting blocks are respectively fixedly installed on the side walls of the upper telescopic rod and the lower telescopic rod. The limiting blocks are slidably connected to the limiting grooves in the vertical direction.

Images