Device and method for detecting the position of a pre-embedded line pipe in a concrete floor

Abstract

This invention discloses a device and method for detecting the location of embedded conduits in concrete floor slabs, relating to the field of building engineering technology. It includes a detection mechanism for detecting the location of conduits. The detection mechanism comprises a body and a detection head. The body includes a data motherboard for processing signals, a positioning display for imaging and showing the conduit location based on the signals, and a power supply module. The detection head includes a signal transmitter and a signal receiver, both mounted at one end of the body. The data motherboard is electrically connected to the positioning display, the power supply module, and the detection head. This invention facilitates the detection of the location of embedded conduits.

Description

Technical Field

[0001] This application relates to the field of building engineering technology, and in particular to a device and method for detecting the location of pre-embedded conduits in concrete floor slabs. Background Technology

[0002] In modern building construction, electrical wires and other communication conduits are usually pre-installed before the concrete floor slab is poured, making them invisible later. However, during later construction and maintenance, due to reasons such as the installation and repair personnel not being the same construction team or workers who originally installed the conduits, or the passage of time causing workers to forget the conduit's location, maintenance personnel may not know the conduit's location. Therefore:

[0003] The first method involves observing the pipeline outlet and then excavating to determine the pipeline's location.

[0004] The second method involves attaching a signal-emitting device to the exposed end of the pipeline, and then using another detection device, which is held by staff and scanned on the floor to detect the location of the pipeline.

[0005] The above two methods are both inconvenient. One is completely manual and is prone to damaging pipelines; the other involves relatively numerous and bulky devices. Therefore, this application proposes a new technical solution. Summary of the Invention

[0006] To facilitate the detection of the location of embedded conduits, this application provides a device and method for detecting the location of embedded conduits in concrete floor slabs.

[0007] This application provides a device and method for detecting the location of embedded conduits in concrete floor slabs, employing the following technical solution:

[0008] The system includes a detection mechanism for detecting pipeline locations. The detection mechanism comprises a body and a detection head. The body includes a data motherboard for processing signals, a positioning display for imaging and showing the pipeline location based on the signals, and a power supply module. The detection head includes a signal transmitter and a signal receiver, both mounted at one end of the body. The data motherboard is electrically connected to the positioning display, the power supply module, and the detection head. The data motherboard is configured as follows:

[0009] Establish two timing modules, with one timing module used for timing the signal transmission time of the signal transmitter, and defined as t1;

[0010] Another timing module is used to time the signal reception time of the signal receiver head and is defined as t2;

[0011] Calculate the difference between t2 and t1 for any given signal period, and define the difference between t2 and t1 for any given signal period as the depth obtained by detection;

[0012] Compare multiple consecutive differences;

[0013] If the difference in a certain instance is less than the other adjacent differences on the time axis, a prompt message indicating that the corresponding conduit has been detected will be output and displayed on the positioning display.

[0014] Optionally, a balancing mechanism is also included, comprising a connecting ball and a bracket. The connecting ball is movably connected to a wall panel of the machine body away from the positioning display and is located at the end of the machine body away from the probe head. One end of the bracket is fixed to the connecting ball. The bracket extends first to the side, then upward, and finally extends towards the machine body. A crossbar is fixed on the bracket above the machine body. The length of the crossbar is greater than the width of the machine body. Both ends of the crossbar are provided with pull ropes. The ends of the two pull ropes slide vertically to the two side walls of the machine body, respectively. The weight of the end of the machine body closer to the probe head is greater than that of the end farther from the probe head.

[0015] Optionally, the two side walls of the machine body connected to the pull rope are provided with sliding grooves, and a movable block is slidably connected in the sliding grooves, with the pull rope connected to the movable block.

[0016] Optionally, the crossbar is provided with two linear guides corresponding to two pull ropes respectively. The ends of the pull ropes are connected to the sliders of the linear guides. A pressure diaphragm is provided in the groove and is located below the movable block at the highest point of the groove. The pressure diaphragm and the linear guides are electrically connected to the data motherboard. The data motherboard is configured to control the linear guides on the opposite sides to work if the pressure value fed back by the pressure diaphragm is greater than a preset value.

[0017] Optionally, it also includes a movable trolley for moving the detection mechanism. The movable trolley is equipped with a connecting frame, and a snap-fit ​​block is fixed at the upper end of the connecting frame. A snap-fit ​​groove is formed at the intersection of the transverse section and the upward extension section of the bracket. The snap-fit ​​block is inserted into the snap-fit ​​groove. A support rod is rotatably connected to the side wall of the connecting frame. A fixing groove for snapping the support rod is carved in the section of the bracket near the connecting ball. The end of the support rod is inserted into the fixing groove. The movable trolley has a notch for the signal of the probe to pass through. The movable trolley is an electric structure.

[0018] Optionally, bolts are threaded onto the side wall of the machine body, the pull rope is fixed to the bolts, and a fixing seat for fixing the bolts is installed on the movable trolley, the fixing seat having a threaded groove.

[0019] Optionally, the linear guide rail slider is provided with a rope winding assembly, the rope winding assembly includes a rotating seat and a rotating shaft, the rotating seat is fixedly connected to the slider, the rotating shaft is rotatably connected to the rotating seat and can move axially relative to the rotating seat, one end of the rotating shaft extends radially to a limit block, the rotating seat is provided with a limit groove for the limit block to engage, and the pull rope is arranged around the rotating shaft.

[0020] Optionally, the mobile car integrates a wireless communication module and is equipped with a remote controller. The wireless communication module is connected to the remote controller and the data motherboard. The data motherboard is configured to: if the difference in a certain time is less than other adjacent differences on the time axis, then the mobile car will trigger an alarm through a preset sound / light alarm.

[0021] The mobile vehicle is configured such that if it receives an audible / visual alarm command, it acquires multiple consecutive differences from the detection mechanism, compares the results, and performs movement control based on the comparison results.

[0022] This application provides a high-precision detection method for the location of embedded conduits in concrete floor slabs, employing the following technical solution:

[0023] A high-precision detection method for the location of embedded conduits in concrete floor slabs, applied to the high-precision detection device for the location of embedded conduits in concrete floor slabs as described in any one of claims 8, includes the following steps:

[0024] S1. Preparatory work, which includes:

[0025] Select the method of using the detection device;

[0026] If the selected usage method requires carrying the stand by hand, then install the stand onto the outer casing of the device;

[0027] If the selected usage method requires the use of a mobile cart, then connect the bracket on the outer shell of the machine to the mobile cart.

[0028] S2, Inspection pipeline, which includes:

[0029] The detection device is carried by hand or moved by a mobile cart.

[0030] Observe the pipeline position using the positioning display;

[0031] The specific location of the pipeline is determined based on the image transmitted back to the positioning display by the detection device.

[0032] S3, maintenance pipelines, which include:

[0033] The floor slab was excavated based on the detected pipeline locations;

[0034] Repair the pipeline.

[0035] In summary, this application includes the following beneficial technical effects: by emitting ultrasonic or electromagnetic waves as detection signals through the probe, when the signal encounters an obstacle, such as a pre-buried conduit, it will be reflected back and received by the probe, and then the signal will be transmitted to the data motherboard for analysis and processing. The distribution of pipelines in the floor slab can be intuitively observed through the positioning display, thereby making it more convenient to detect the location of pre-buried pipelines. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of this application;

[0037] Figure 2 This is a schematic diagram of the internal structure of the body of this application;

[0038] Figure 3 This is a schematic diagram of the balancing mechanism in this application;

[0039] Figure 4 This is a schematic diagram of the connection between the bracket and the connecting frame in this application;

[0040] Figure 5 yes Figure 4 Enlarged view of section A;

[0041] Figure 6 This is a schematic diagram of the data motherboard connection in this application;

[0042] Figure 7 This is a flowchart of the method in this application.

[0043] Explanation of reference numerals in the attached drawings: 1. Detection mechanism; 2. Balancing mechanism; 3. Movable trolley; 11. Body; 111. Data motherboard; 112. Positioning display; 113. Power supply module; 114. Movable block; 115. Pressure diaphragm; 12. Detector head; 121. Signal transmitter head; 122. Signal receiver head; 21. Connecting ball; 22. Bracket; 23. Crossbar; 24. Pull rope; 25. Linear guide rail; 26. Rope winding assembly; 261. Rotating seat; 262. Rotating shaft; 263. Limiting block; 31. Connecting frame; 32. Snap-fit ​​block; 33. Support rod; 34. Fixed seat; 35. Wireless communication module; 36. Remote control. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0045] This application discloses a device and method for detecting the location of pre-embedded conduits in concrete floor slabs.

[0046] Reference Figure 1 and Figure 2The high-precision detection device for the location of pre-embedded conduits in concrete floor slabs includes a detection mechanism 1 for detecting the location of the conduits. The detection mechanism 1 includes a body 11 and a detection head 12. The detection head 12 is installed at one end of the housing of the body 11. The housing of the body 11 has a cuboid structure and mainly includes three modules: a data motherboard 111, a positioning display 112, and a power supply module 113. The data motherboard 111 can be an integrated circuit board with a data processor, mainly used to receive and process the signals fed back from the detection head 12. The positioning display 112 can display the data results processed by the data motherboard 111 to the staff through the screen of the positioning display 112, which facilitates the staff to carry out the next step of work. The power supply module 113 supplies power to all modules and can be designed according to the needs of the working environment. It can be a power supply method with active power or passive power.

[0047] The probe 12 emits ultrasonic or electromagnetic waves as a detection signal. When the signal encounters an obstacle, such as a pre-buried conduit, it is reflected back and received by the probe 12. The signal is then transmitted to the data motherboard 111. The data motherboard 111 uses an embedded algorithm formula, such as v*t / 2, which is the signal transmission speed multiplied by the time interval between receiving signals divided by two, to calculate and analyze whether a pre-buried conduit has been detected. If it is presumed that a pre-buried conduit has been detected, the probe continues to detect based on the conduit path imaged by the positioning display 112 and the feedback information from the data motherboard 111. This makes it easier to detect the location of the pre-buried conduit and improves the accuracy of the detection.

[0048] The probe head 12 includes a signal transmitter 121 and a signal receiver 122. The data motherboard 111 is electrically connected to the positioning display 112, the power supply module 113, and the probe head 12. The data motherboard 111 is configured as follows:

[0049] Two timing modules are established, and one timing module is used to time the signal transmission time of the signal transmitter 121, and is defined as t1;

[0050] Another timing module is used to time the signal reception time of the signal receiver head 122, and is defined as t2;

[0051] Calculate the difference between t2 and t1 for any given signal period, and define the difference between t2 and t1 for any given signal period as the depth obtained by detection;

[0052] By comparing multiple consecutive differences, and observing the changes in the differences, it is possible to more intuitively determine whether there are obstacles, i.e., pre-embedded conduits, inside the floor slab.

[0053] If the difference in a given time step is less than any other adjacent difference on the time axis, a notification message indicating that the corresponding conduit has been detected is output and displayed on the positioning display 112. By analyzing and displaying the notification message on the positioning display 112, the location of the conduit within the floor slab can be seen more intuitively.

[0054] The preset signal transmission time is t1, and the first signal reception time is t2. During this period, the signal may be reflected and received multiple times. Therefore, we only consider the received signal t2, which is the closest to the transmission time t1. If the signal transmission speed in the floor slab is v, then the floor slab cross-sectional depth of the reflected signal is v*(t2-t1) / 2. However, since the speed is basically constant, it can be ignored. That is, we can analyze whether the pre-buried pipeline is detected by the fluctuation of the difference between t2 and t1. The minimum value of t2-t1 can be identified as the location of the pre-buried pipeline.

[0055] In another embodiment of this application:

[0056] Reference Figure 3 It also includes a balancing mechanism 2, which includes a connecting ball 21 and a bracket 22. The shell of the body 11 has a groove for the connecting ball 21 to be inserted into the wall panel away from the positioning display 112. The groove is located close to the end of the body 11 where the probe 12 is not installed. The connecting ball 21 is hinged in the groove. The bracket 22 is formed by the connecting ball 21 extending outward, then upward, and finally towards the body 11. A crossbar 23 is fixed on the bracket 22. The length of the crossbar 23 is greater than the width of the shell of the body 11. Pull ropes 24 are provided at both ends of the crossbar 23. The ends of the two pull ropes 24 are vertically slidably connected to the two side walls of the body 11, which can fix the body 11 and maintain its balance. The weight of the end of the body 11 closer to the probe head 12 is greater than the weight of the end farther from the probe head 12. A connecting ball 21 is installed on the side wall of the body 11. The connecting ball 21 and the body 11 are ball-hinged, so the body 11 can rotate and the heavier end faces downward. This setting can make the probe head 12 of the body 11 as vertical as possible to the floor, increasing the accuracy of the detected data. The mounting bracket 22 makes it easier to hold the body 11 and the structure of the bracket 22 will not hinder the rotation of the body 11.

[0057] Reference Figure 1 and Figure 3 The two side walls of the body 11 connected to the pull rope 24 are provided with sliding grooves, and movable blocks 114 are slidably connected in the sliding grooves. The pull rope 24 is connected to the movable blocks 114. The sliding grooves on the side walls of the body 11 can prevent the pull rope 24 from blocking the sides of the body 11 when it is tilted, so that the body 11 can be fixed without hindering its free rotation.

[0058] A linear guide rail 25 is connected to the crossbar 23 via bolts and nuts. There are two linear guide rails 25, each corresponding to one of the two pull ropes 24. The guide rails 25 are fixed to the crossbar 23. The sliders of the linear guide rails 25 are connected to the pull ropes 24. A pressure diaphragm 115 is installed in the slide groove of the housing 11, and the pressure diaphragm 115 is positioned below the movable block 114 located at the highest point of the slide groove. The pressure diaphragm 115 can be used to detect whether the movable block 114 has moved to the vicinity of the pressure diaphragm 115. When the movable block 114 moves to the pressure diaphragm 115, i.e., the bracket 22 tilts, one pull rope 24 moves downwards. However, the end of the pull rope 24 on the other side remains at the highest point of the slide groove, allowing the linear guide rail 25 to drive the pull rope 24 to move outwards, thus preventing the pull rope 24 from sticking tightly to the housing 11 and restricting the rotation and tilt of the housing 11. The pressure diaphragm 115 and the linear guide rails 25 are electrically connected to the data motherboard 111, which is configured as follows:

[0059] If the pressure value reported by the pressure diaphragm 115 is greater than the preset value, the linear guide 25 on the opposite side will be controlled to operate. The preset value is the value reported by the pressure diaphragm 115 when there is no moving block 114 contacting it. Since the pressure diaphragm 115 may report pressure even when there is no moving block 114 contacting it, a preset value can be used for comparison and to control the operation of the linear guide 25.

[0060] In another embodiment of this application:

[0061] Reference Figure 3 and Figure 4 The system also includes a movable trolley 3, which drives the detection mechanism 1. The movable trolley 3 is electrically powered and can be a remote-controlled trolley as used in existing technologies, which will not be described in detail here. A connecting frame 31 is mounted on the movable trolley 3. A snap-fit ​​block 32 is fixed to the upper end of the connecting frame 31. A snap-fit ​​groove is formed at the intersection of the transverse section and the upward extension section of the bracket 22. The snap-fit ​​block 32 is inserted into the snap-fit ​​groove, so the bracket 22 and the connecting frame 31 are snapped together. A support rod 33 is hinged to the side wall of the connecting frame 31. A fixing groove for the support rod 33 to snap into is carved in the section of the bracket 22 near the connecting ball 21. The end of the support rod 33 can be rotated to the fixing groove and inserted into the fixing groove, thereby further supporting the connecting frame 31 and the bracket 22. The movable trolley 3 has a notch for the signal of the detection head 12 to pass through. This structure facilitates the extension of the detection head 12 and its detection of the floor slab.

[0062] Reference Figure 1 and Figure 3The pull rope 24 and the body 11 are detachably connected, which can be by bolts. Bolts are threaded on the side wall of the body 11. The pull rope 24 can be wrapped around and tied to the bolts. The movable trolley 3 is equipped with a fixing seat 34 for the bolts to pass through. The fixing seat 34 has a threaded groove. When the movable trolley 3 is needed, the bracket 22 and the connecting frame 31 can be snapped together, the support rod 33 can be bent to the fixing groove and snapped into the fixing groove, the pull rope 24 can be removed from the side wall of the body 11, that is, the bolt can be unscrewed, and then the bolt and the pull rope 24 can be fixed to the fixing seat 34.

[0063] Reference Figure 1 and Figure 5 The linear guide 25 has a rope winding assembly 26 on its slider. The rope winding assembly 26 includes a rotating seat 261 and a rotating shaft 262. The rotating seat 261 is fixedly connected to the slider, and the rotating shaft 262 is rotatably connected to the rotating seat 261 and can move axially relative to the rotating seat 261. Both ends of the rotating shaft 262 extend outward beyond the side wall of the rotating seat 261. One end extends radially to a limiting block 263. The diameter of a section of the other end of the rotating shaft 262 is larger than the diameter of the through hole on the rotating seat 261, which can prevent the rotating shaft 262 from falling off when the limiting block 263 is pushed or pulled. A limiting groove is carved in one of the rotating seats 261 near the limiting block 263, and the limiting block 263 can be engaged in the limiting groove. The pull rope 24 is arranged around the rotating shaft 262. When it is not necessary to stretch the pull rope 24, the rope winding assembly 26 can lock the pull rope 24 in place.

[0064] Reference Figure 6 The mobile car 3 integrates a wireless communication module 35 and is equipped with a remote control 36. The wireless communication module 35 is connected to the remote control 36 and the data motherboard 111. The data motherboard 111 is configured as follows:

[0065] If the difference in a certain instance is less than the other adjacent differences on the time axis, then the moving car 3 will trigger an alarm via a preset sound / light alarm.

[0066] The configuration of the mobile vehicle is as follows: if it receives an alarm command from the sound / light alarm, it acquires multiple consecutive differences from the detection mechanism 1 and compares the results, and then controls the movement based on the comparison results.

[0067] A minimum value can be defined as the data whose difference is less than other adjacent differences on the time axis. When a minimum value occurs, the alarm sounds. After receiving the alarm command, the moving car detects and analyzes where it should move according to the command. For example, after the alarm sounds, if it moves to the left, a minimum value appears first and then disappears, or the minimum values ​​disappear between each other, then it continues to move to the right and returns to the original position. Then it moves forward from the position where the minimum value appeared. If the minimum value disappears again, it continues to return to the original position and moves in a different direction. If the minimum value does not disappear, it can continue to move in that direction until the minimum value disappears, then return to the position where the most recent minimum value appeared and repeat the above steps.

[0068] This application also discloses a high-precision detection method for the location of pre-embedded pipelines in concrete floor slabs.

[0069] Reference Figure 7 A high-precision detection method for the location of embedded pipelines in concrete floor slabs includes the following steps:

[0070] S1. Preparatory work, which includes:

[0071] Choose a method of using the detection device, such as: using the detection device directly by hand, using the support 22 by hand, or using it in conjunction with the mobile trolley 3.

[0072] If the selected usage method requires carrying the stand 22 by hand, then install the stand 22 onto the outer shell of the body 11;

[0073] If the selected usage method requires the use of the movable trolley 3, then connect the bracket 22 on the outer shell of the machine body 11 to the movable trolley 3, and install the machine body 11 and the movable trolley 3; connect the bracket 22 of the machine body 11 to the connecting frame 31 of the movable trolley 3, move the support rod 33, insert the support rod 33 into the fixing groove, and twist the pull rope 24 out from the side wall of the machine body 11 and install it on the fixing seat 34 of the movable trolley 3; by installing the machine body 11 on the movable trolley 3, it is not necessary to carry the machine body 11 by hand to check the pipeline position, which is more convenient.

[0074] S2, Inspection pipeline, which includes:

[0075] The detection device is carried by hand or moved by a mobile cart 3;

[0076] The pipeline position can be observed through the screen of the positioning display 112; after the data motherboard 111 processes the data results fed back by the probe 12, it will be presented to the staff through the screen of the positioning display 112, so that the pipeline position can be seen more intuitively.

[0077] The specific location of the pipeline is determined based on the image transmitted back to the positioning display 112 by the detection device.

[0078] S3, maintenance pipelines, which include:

[0079] The floor slab can be excavated based on the detected pipeline locations; once the specific locations of the pipelines are determined, the floor slab can be excavated.

[0080] Repair the pipeline.

[0081] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision detection device for the position of pre-embedded conduits in concrete floor slabs, characterized in that: The system includes a detection mechanism (1) for detecting pipeline locations. The detection mechanism (1) includes a body (11) and a detection head (12). The body (11) includes a data motherboard (111) for processing signals, a positioning display (112) for imaging and displaying pipeline locations based on signals, and a power supply module (113). The detection head (12) includes a signal transmitter (121) and a signal receiver (122), both of which are mounted on one end of the body (11). The data motherboard (111) is electrically connected to the positioning display (112), the power supply module (113), and the detection head (12). The data motherboard (111) is configured as follows: Two timing modules are established, and one timing module is used as the signal transmission time timing of the signal transmitter (121), and is defined as t1; Another timing module is used to time the signal reception time of the signal receiver head (122) and is defined as t2; Calculate the difference between t2 and t1 for any given signal period, and define the difference between t2 and t1 for any given signal period as the depth obtained by detection; Compare multiple consecutive differences; If the difference in a certain instance is less than the other adjacent differences on the time axis, the corresponding prompt message indicating that the tube has been detected will be output and displayed on the positioning display (112). It also includes a balancing mechanism (2), which includes a connecting ball (21) and a bracket (22). The connecting ball (21) is movably connected to the wall panel of the body (11) away from the positioning display (112) and is located at the end of the body (11) away from the probe (12). One end of the bracket (22) is fixed to the connecting ball (21). The bracket (22) first extends to the side and then extends upward, and finally extends towards the body (11). A crossbar (23) is fixed on the bracket (22) above the body (11). The length of the crossbar (23) is greater than the width of the body (11). Both ends of the crossbar (23) are provided with pull ropes (24). The ends of the two pull ropes (24) are vertically slidably connected to the two side walls of the body (11). The weight of the end of the body (11) closer to the probe (12) is greater than that of the end away from the probe (12). The two side walls of the body (11) connected to the pull rope (24) are provided with sliding grooves, and a movable block (114) is slidably connected in the sliding grooves. The pull rope (24) is connected to the movable block (114). The crossbar (23) is provided with two linear guides (25) corresponding to two pull ropes (24) respectively. The ends of the pull ropes (24) are connected to the sliders of the linear guides (25). The groove is provided with a pressure diaphragm (115) and the pressure diaphragm (115) is located below the movable block (114) at the highest point of the groove. The pressure diaphragm (115) and the linear guides (25) are electrically connected to the data motherboard (111). The data motherboard (111) is configured such that if the pressure value fed back by the pressure diaphragm (115) is greater than the preset value, the linear guides (25) on the opposite side are controlled to work.

2. The high-precision detection device for the position of embedded conduits in concrete floor slabs according to claim 1, characterized in that: It also includes a movable trolley (3) for moving the detection mechanism. A connecting frame (31) is installed on the movable trolley (3). A snap-fit ​​block (32) is fixed at the upper end of the connecting frame (31). A snap-fit ​​groove is formed at the intersection of the transverse section and the upward extension section of the bracket (22). The snap-fit ​​block (32) is inserted into the snap-fit ​​groove. A support rod (33) is rotatably connected to the side wall of the connecting frame (31). A fixed groove for snap-fitting the support rod (33) is dug in a section of the bracket (22) near the connecting ball (21). The end of the support rod (33) is inserted into the fixed groove. The movable trolley (3) has a notch for the signal of the probe (12) to pass through. The movable trolley (3) is an electric structure.

3. The high-precision detection device for the position of embedded conduits in concrete floor slabs according to claim 2, characterized in that: Bolts are threaded onto the side wall of the body (11), the pull rope (24) is fixed to the bolts, and a fixing seat (34) for fixing the bolts is installed on the movable trolley (3). The fixing seat (34) has a threaded groove.

4. The high-precision detection device for the position of embedded conduits in concrete floor slabs according to claim 3, characterized in that: The linear guide rail (25) has a rope winding assembly (26) on its slider. The rope winding assembly (26) includes a rotating seat (261) and a rotating shaft (262). The rotating seat (261) is fixedly connected to the slider. The rotating shaft (262) is rotatably connected to the rotating seat (261) and can move axially relative to the rotating seat (261). One end of the rotating shaft (262) extends radially to a limiting block (263). The rotating seat (261) has a limiting groove for the limiting block (263) to engage. The pull rope (24) is arranged around the rotating shaft (262).

5. The high-precision detection device for the position of embedded conduits in concrete floor slabs according to claim 4, characterized in that: The mobile car (3) integrates a wireless communication module (35) and is equipped with a remote controller (36). The wireless communication module (35) is connected to the remote controller (36) and the data motherboard (111). The data motherboard (111) is configured to: if the difference in a certain time is less than other adjacent differences on the time axis, then the mobile car (3) will alarm through a preset sound / light alarm. The mobile vehicle (3) is configured such that if it receives an audible / visual alarm command, it obtains multiple consecutive differences from the detection mechanism (1) and compares the results, and then performs movement control based on the comparison results.

6. A high-precision detection method for the location of pre-embedded conduits in concrete floor slabs, characterized in that: The application of the high-precision detection device for the location of embedded conduits in concrete floor slabs as described in any one of claims 2 to 5 includes the following steps: S1. Preparatory work, which includes: Select the method of using the detection device; If the selected usage method requires carrying the stand (22) by hand, then install the stand (22) to the outer shell of the body (11); If the selected usage method requires the use of the mobile cart (3), then the bracket (22) on the outer shell of the machine body (11) is snapped into the mobile cart (3); S2, Inspection pipeline, which includes: (3) Moving with the detection device by hand or on a mobile cart; Observe the pipeline position using the positioning display (112); The specific location of the pipeline is determined based on the image transmitted back to the positioning display (112) by the detection device; S3, maintenance pipelines, which include: The floor slab was excavated based on the detected pipeline locations; Repair the pipeline.

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