A wireless monitoring device for preventing detachment of tunnel lining trolleys

Abstract

This utility model belongs to the field of tunnel construction monitoring technology, and discloses a wireless monitoring device for preventing detachment of tunnel lining trolleys. It includes a housing, a sealing plate, an antenna, and a battery module. A strong magnet is installed on the top of the housing. A receiving cavity is machined on the side wall of the housing, and the detection module is installed inside the receiving cavity. The antenna is installed below the housing. The sealing plate is installed on the side wall of the housing outside the receiving cavity, and a sealing strip seals the detection module inside the housing. The battery module is detachably installed on the side of the sealing plate away from the housing. Audible and visual alarms and reset buttons are also installed on both sides of the housing. A waterproof gland and a power indicator light are also provided on the bottom of the waterproof housing on the antenna side. This utility model adopts a wireless design, eliminating the cost and time of wiring, greatly improving the deployment cycle. It is also unaffected by differences in trolley size and traditional control cabinet location. Furthermore, the strong magnet installed on the housing reduces the difficulty of deployment.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel construction monitoring technology, specifically relating to a wireless monitoring device for preventing detachment of tunnel lining trolleys. Background Technology

[0002] Tunnel lining trolleys are specialized equipment that must be used in the secondary lining process of tunnel construction, for the construction of concrete lining on the inner wall of the tunnel. Existing lining trolleys require multiple monitoring points, which are connected to the control cabinet via cables. However, this cable connection method has the following problems: 1. Lining trolleys are generally not designed with cable routing in mind, or the reserved channels are unsuitable for the site environment, necessitating non-standard wiring, or even cutting grooves and holes in the lining trolley, posing safety hazards; 2. Due to the limited space in tunnels, the intersection rate of signal lines and power lines is high, easily causing strong electromagnetic interference, increasing the system's false alarm rate, which can interfere with construction operations; 3. The size and specifications of lining trolleys vary across different construction sites, while the monitoring system is mostly the same. To adapt to multiple sites, frequent wiring is required. However, changes in lining trolley size mean that signal lines cannot be reused after being cut, resulting in a high rate of cable waste; 4. If signal lines age or break, system shutdown is required for troubleshooting, resulting in high maintenance time and project costs; 5. Existing monitoring devices rely on the control cabinet for operation, posing a single point of failure risk. Therefore, a monitoring device that can solve the above problems is needed. Utility Model Content

[0003] The purpose of this utility model is to solve the problems in the background technology and provide a wireless monitoring device for preventing detachment of tunnel lining trolleys. This monitoring device adopts wireless communication, which solves the problem of wired deployment. At the same time, it adopts magnetic installation, which eliminates the need to drill holes on the trolley and effectively protects the integrity of the trolley.

[0004] The objective of this utility model is achieved through the following technical solution: A wireless monitoring device for preventing voiding of a tunnel lining trolley includes a housing, a sealing plate, an antenna, and a battery module. A strong magnet is installed on the top of the housing. A receiving cavity is machined on the side wall of the housing, and a detection module is installed inside the receiving cavity. The antenna is installed below the housing and passes through the housing to connect with the detection module. The sealing plate is installed on the side wall of the housing outside the receiving cavity, and together with a sealing strip, seals the detection module inside the housing. The battery module is detachably installed on the side of the sealing plate away from the housing. The battery module is connected to the detection module through a waterproof connector located at the bottom of the housing. Audible and visual alarms and reset buttons connected to the detection module are also installed on both sides of the housing. A waterproof gland and a power indicator light are also provided on the bottom of the waterproof housing on the antenna side.

[0005] The battery module is connected to the sealing plate by magnetic pillars and iron plates. The magnetic pillars are fixed at the four corners of the battery module, and the iron plates are embedded in the sealing plate.

[0006] A guide rail is installed inside the cavity, and the detection module is mounted on the guide rail. The detection module includes an I / O to RS-485 module, a wireless communication module, and a liquid level relay. The liquid level relay is used to detect signals. The liquid level relay is connected to the audible and visual alarm and the I / O to RS-485 module. The I / O to RS-485 module is connected to the wireless communication module, and the wireless communication module is connected to the antenna.

[0007] The beneficial effects of the anti-detachment wireless monitoring device for tunnel lining trolleys provided by this utility model are: (1) The wireless design eliminates the cost and time of wiring, greatly improving the deployment cycle. It is not affected by the size of the trolley or the position of the traditional control cabinet. Secondly, the box is equipped with strong magnets, which can be directly attached to the trolley or steel column without welding, drilling or other preparation work, thus reducing the workload. (2) Through wireless connection, using a dedicated communication protocol, there is no need to worry about electromagnetic interference caused by the mixed laying of traditional signal lines and power lines, and there is no need to worry about the risk of leakage in the humid environment of the tunnel. (3) Modular power supply is adopted, and backup batteries and waterproof plugs can be used to achieve quick replacement, avoiding detection interruption due to power failure. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a structural schematic diagram provided for an embodiment of the present utility model.

[0010] Figure 2 This is a side view structural diagram provided for an embodiment of the present utility model.

[0011] Figure 3 This is a schematic diagram of the internal structure of the box provided in an embodiment of the present utility model.

[0012] Figure 4 This is a schematic diagram of the installation position provided for an embodiment of the present utility model.

[0013] Figure 5 A flowchart illustrating an embodiment of this utility model.

[0014] The diagram shows the following markings: 1. Box body; 11. Strong magnet; 12. Receiving cavity; 13. Guide rail; 14. Audible and visual alarm; 15. Reset button; 16. Waterproof gland; 17. Power indicator light; 2. Detection module; 21. IO to 485 module; 22. Wireless communication module; 23. Liquid level relay; 3. Sealing plate; 31. Iron sheet; 4. Antenna; 5. Battery module; 51. Magnetic column; 52. Waterproof connector. Detailed Implementation

[0015] like Figures 1-3 As shown, the wireless monitoring device for preventing voiding of a tunnel lining trolley provided in this embodiment includes a housing 1, a sealing plate 3, an antenna 4, and a battery module 5. The housing 1 is injection molded from engineering plastic. A strong magnet 11 is installed on the top of the housing 1. A receiving cavity 12 is machined on the side wall of the housing 1. A guide rail 13 is installed in the receiving cavity 12. The detection module 2 is installed on the guide rail 13. The detection module 2 includes an IO to 485 module 21, a wireless communication module 22, and a liquid level relay 23. 23 is used for signal detection. The liquid level relay 23 is connected to the audible and visual alarm 14 and the IO to 485 module 21. The IO to 485 module 21 is connected to the wireless communication module 22. The wireless communication module 22 is connected to the antenna 4. The wireless communication module 22 adopts a LoRa wireless transmission module, and the antenna 4 adopts an SMA interface external antenna 4. The antenna 4 is installed below the housing 1 and passes through the housing 1 to connect to the wireless communication module 22 of the detection module 2. The housing 1 and the antenna 4 are fixed together with epoxy resin. The sealing plate 3 The detection module 2 is sealed inside the box 1 by a sealing strip on the side wall of the housing 1 outside the receiving cavity 12. The battery module 5 is detachably installed on the side of the sealing plate 3 away from the box 1. Magnetic posts 51 and iron plates 31 are installed between the battery module 5 and the sealing plate 3 for connection. The magnetic posts 51 are fixed at the four corners of the battery module 5, and the iron plates 31 are embedded in the sealing plate 3. The battery module 5 is connected to the detection module 2 through a waterproof connector 52 located at the bottom of the box 1. The female end of the waterproof connector 52... Fixed to the housing 1, the male connector of the waterproof connector 52 is connected to the battery module 5. A waterproof box is also provided on the outside of the battery module 5. The battery module 5 is connected through the exposed male connector. The male and female connectors adopt a reverse insertion protection design to avoid the dark environment of the tunnel affecting the power supply. The housing 1 is also equipped with an audible and visual alarm 14 and a reset button 15 connected to the detection module 2 on both sides. The bottom of the waterproof housing 1 on the side of the antenna 4 is also equipped with a waterproof gland 16 and a power indicator light 17. The detection line of the liquid level relay 23 is led out through the waterproof gland 16.

[0016] The method of using this utility model is as follows: like Figures 1-5As shown, the wireless monitoring device is attached to the detection position of the lining trolley using a strong magnet 11, or connected to the lining trolley using screws. The electrodes of the liquid level sensor are then pulled out from the waterproof gland 16, and the signal lines of the electrodes are connected to the waterproof membrane at the top of the tunnel via a grouting pipe. The common line is connected to the trolley structure. When the poured concrete reaches the position of the waterproof membrane at the top of the tunnel, the concrete acts as a conductive medium, creating a communication loop that triggers the liquid level relay 23, generating a concrete full-fill signal. Then, the IO-to-485 module 21 converts the signal to a 485 level signal, which is transmitted to the antenna 4 by the wireless communication module 22. The antenna 4 then sends the signal to the control cabinet. After logic processing, a feedback signal indicating that the concrete pouring is complete is finally output, and simultaneously, the audible and visual alarm 14 sounds an alarm.

[0017] Compared to existing limited detection methods: This solution uses wireless signal transmission, eliminating the need for laying signal cables and avoiding cable chaos caused by insufficient wiring space on the lining trolley or improper construction (such as interference caused by mixed signal and power lines); it uses strong magnets for installation, allowing direct attachment to the trolley template or steel column without welding or drilling, making installation convenient and without damaging the trolley structure, and adaptable to flexible deployment of trolleys of different sizes; the deployment scheme is not limited by trolley size or PLC control cabinet location, eliminating the need for customized cable lengths and solving the problem of excessively long or insufficient cables caused by differences in trolley size in traditional wired methods; it also reduces reliance on a single control node, preventing the entire detection system from being paralyzed due to control cabinet failure, and ensuring data continuity in critical construction stages such as concrete pouring.

[0018] Furthermore, antenna 4 employs a dedicated wireless communication protocol, which avoids signal distortion caused by electromagnetic interference (such as power cable coupling) in wired transmission, reducing system false alarms and interference with construction. It is also powered by battery module 5, eliminating the risk of leakage and making it more adaptable to humid tunnel environments. Moreover, antenna 4 utilizes LoRa technology in the Sub-GHz band (e.g., 433MHz / 868MHz / 915MHz), where electromagnetic waves have no direct coupling effect with static magnetic fields. Engineering tests show that even when a neodymium magnet (surface magnetic field >5000 Gauss) is placed close to the LoRa module antenna 4, the signal received strength (RSSI) and signal-to-noise ratio (SNR) fluctuations are both <1dB, far below the environmental noise threshold.

[0019] Battery module 5 employs modular power supply and is equipped with a backup battery, enabling rapid replacement and preventing testing interruptions due to power outages, thus ensuring continuous operation. Battery module 5 uses lithium-ion batteries, providing 72 hours of continuous operation (typical conditions) or 180 days of standby time. After 500 complete charge-discharge cycles, the battery retains over 80% of its capacity. Combined with overcharge / over-discharge protection circuitry, a 3-year replacement cycle is recommended under normal use, significantly reducing maintenance frequency. Actual battery life may vary slightly due to factors such as ambient temperature and signal strength.

[0020] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications and substitutions based on the technical solutions and inventive concepts provided by the present invention should be covered within the scope of protection of the present invention.

Claims

1. A void-filling prevention wireless monitoring device for a tunnel lining trolley, characterized by: The device includes a housing (1), a sealing plate (3), an antenna (4), and a battery module (5). A strong magnet (11) is installed on the top of the housing (1). A receiving cavity (12) is machined on the side wall of the housing (1). A detection module (2) is installed in the receiving cavity (12). The antenna (4) is installed below the housing (1) and passes through the housing (1) to connect with the detection module (2). The sealing plate (3) is installed on the side wall of the housing (1) outside the receiving cavity (12) and, together with the sealing strip, seals the detection module (2) in the housing. Inside the body (1), the battery module (5) is detachably installed on the side of the sealing plate (3) away from the box (1). The battery module (5) is connected to the detection module (2) through a waterproof connector (52). The waterproof connector (52) is located below the box (1). The box (1) is also equipped with an audible and visual alarm (14) and a reset button (15) connected to the detection module (2) on both sides. The bottom of the waterproof box (1) on the side of the antenna (4) is also equipped with a waterproof gland (16) and a power indicator light (17).

2. The void detection wireless monitoring device for a tunnel lining jumbo according to claim 1, characterized in that: A magnetic column (51) and an iron sheet (31) are installed between the battery module (5) and the sealing plate (3). The magnetic column (51) is fixed at the four corners of the battery module (5), and the iron sheet (31) is embedded in the sealing plate (3).

3. The void detection wireless monitoring device for a tunnel lining jumbo according to claim 1, characterized in that: The cavity (12) is equipped with a guide rail (13), and the detection module (2) is installed on the guide rail (13). The detection module (2) includes an IO to 485 module (21), a wireless communication module (22), and a liquid level relay (23). The liquid level relay (23) is used to detect signals. The liquid level relay (23) is connected to the audible and visual alarm (14) and the IO to 485 module (21). The IO to 485 module (21) is connected to the wireless communication module (22). The wireless communication module (22) is connected to the antenna (4).

Images