A well lid controller woken up by wireless bluetooth short distance

Abstract

The utility model relates to the technical field of well lid controller and disclose a kind of well lid controller of short-range wake-up using wireless bluetooth, including controller body, the lateral wall of controller body is fixed with connecting rod, sleeve is fixed on the connecting rod, sliding cylinder is sealingly connected in the inside of sleeve, the top of sliding cylinder is fixed with the antenna placement shell for placing receiving signal antenna, the inside of sleeve is equipped with telescopic mechanism.The scheme passes through mechanical telescopic antenna structure, makes antenna dynamic disengagement metal shield area under the premise of not reforming well lid, improves the stability of bluetooth signal, adopts bistable locking and rotation interlocking mechanism, ensures reliable operation, prevents false touch, does not need motor drive, maintenance-free and low power consumption, and compact structure, theftproof and anti-blocking, suitable for the intelligent transformation of various hole well lids, with high reliability, low cost, easy deployment and other advantages, provide a feasible technical scheme for the wisdom of urban underground pipe network.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover controller technology, and in particular to a manhole cover controller that uses wireless Bluetooth for short-range wake-up. Background Technology

[0002] A manhole cover controller that utilizes Bluetooth for near-field wake-up is a low-power intelligent device. It is normally in a deep sleep state to save power. When maintenance personnel approach the manhole cover with a mobile phone or handheld device, the wake-up mechanism is triggered via Bluetooth signal. The controller then starts up and establishes a connection to perform data transmission, status query, or parameter setting. After completing the operation, it automatically returns to sleep mode. This technology extends battery life and is suitable for remote monitoring and management of various types of manhole covers in cities, improving the level of intelligence of municipal facilities.

[0003] The antenna in the manhole cover controller is used to receive external Bluetooth wake-up signals and transmit manhole cover status data. However, in current smart manhole cover control systems, the antenna design structure restricts the actual application effect of the equipment. In existing technologies, smart manhole cover controllers generally adopt a structural design that integrates the Bluetooth antenna into the device body and installs it on the lower inner side of the manhole cover. Since the main body of the manhole cover is mostly cast from highly conductive metal materials such as cast iron or ductile iron, its physical characteristics create a significant electromagnetic shielding effect, which strongly attenuates the Bluetooth wireless signal operating in the 2.4 GHz ISM band. This leads to a decrease in antenna radiation efficiency, causing the wake-up signal to fail to be delivered reliably, and the device to fail to enter the working state normally. In order to troubleshoot communication failures, maintenance personnel often need to manually open the manhole cover to approach the device for debugging or data reading. This process increases the operational safety risks and labor costs, seriously reduces the response efficiency of pipeline network maintenance, and restricts the large-scale deployment and sustainable operation of urban IoT terminals. Utility Model Content

[0004] The purpose of this invention is to solve the problem of poor signal reception caused by the antenna being blocked by the metal manhole cover in existing smart manhole cover controllers, and to propose a method for waking up a manhole cover controller using wireless Bluetooth at close range.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A manhole cover controller that uses Bluetooth for short-range wake-up includes a controller body, a connecting rod fixed to the side wall of the controller body, a sleeve fixed to the connecting rod, a sliding cylinder slidably connected inside the sleeve, an antenna housing for placing a receiving signal antenna fixed to the top of the sliding cylinder, and a telescopic mechanism inside the sleeve for controlling the extension and retraction of the sliding cylinder.

[0007] As a preferred embodiment of this utility model, the telescopic mechanism includes a limiting ring fixedly connected to the inner side of the sleeve. The inner side of the limiting ring is inclined. The sleeve has two driving blocks inside, which are slidably connected to the inner side of the sleeve via guide members. The top and bottom of the driving blocks are both provided with inclined surfaces. The inner bottom surface of the limiting ring has two matching grooves, which are adapted to the upper half of the driving blocks. The side wall of the sliding cylinder has two slots, and a locking block is slidably connected inside the slot. A second spring is provided between the locking block and the inner side of the slot. A first spring is provided between the bottom of the sliding cylinder and the inner bottom surface of the sleeve.

[0008] As a preferred technical solution of this utility model, a fixing plate is fixed on the inner bottom surface of the sleeve. The fixing plate has a rectangular cross-section. A through-hole is opened on the inner side of the slot. The through-hole is connected to the inside of the sliding cylinder. A limit rod is fixed on the side wall of the locking block facing the central axis of the sliding cylinder. The limit rod passes through the through-hole. A rotating ring is rotatably connected to the bottom of the sliding cylinder. The top end of the spring is fixed to the rotating ring. Two blocking blocks are fixed on the inner side of the sleeve. The blocking blocks are located between the limit ring and the driving block, and the blocking blocks and the driving block are staggered.

[0009] As a preferred technical solution of this utility model, the guide includes a groove and a slider. The groove is opened on the inner side of the sleeve, the slider is slidably connected in the groove, and the slider is fixed to the drive block.

[0010] As a preferred embodiment of this utility model, both the slider and the groove have a T-shaped cross-section.

[0011] As a preferred embodiment of this utility model, the antenna is placed outside the housing in a spherical structure.

[0012] This utility model has the following beneficial effects:

[0013] This solution integrates the antenna into a movable module, enabling dynamic adjustment of the antenna position without altering the manhole cover's structure. This ensures the antenna operates outside the metal shielding area, significantly improving RF link budget and signal penetration loss, and guaranteeing the stability of Bluetooth wake-up and data transmission. The device employs a bistable mechanical locking mechanism and a rotary interlock safety structure, combined with a spring energy storage and release principle. While achieving controllable pressing, rotating, and popping actions, it effectively prevents accidental triggering and extension, balancing structural safety and operational efficiency. The overall design eliminates the need for an external power supply to drive the actuator, avoiding the failure risks and power consumption burden introduced by vulnerable components such as motors and electromagnets. This solution achieves efficient compatibility between intelligent sensing terminals and municipal infrastructure, providing a highly reliable, low-cost, and easily deployable technical path for the intelligent transformation of urban underground pipe networks. It also facilitates the modification of existing manhole covers, demonstrating promising engineering application prospects and promotional value. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a manhole cover controller that utilizes wireless Bluetooth for short-range wake-up according to this utility model.

[0015] Figure 2 This is a cross-sectional view of the sliding cylinder, the limiting ring, and the blocking block;

[0016] Figure 3 This is a cross-sectional view of the sliding cylinder, the limiting ring, and the driving block;

[0017] Figure 4 for Figure 3 Enlarged view of the structure at point A;

[0018] Figure 5 Top view of the fixing plate and the limiting rod;

[0019] Figure 6 This is a schematic diagram of the internal structure of the sleeve.

[0020] In the diagram: 1 Controller body, 11 Connecting rod, 21 Sleeve, 211 Fixing plate, 212 Spring 1, 213 Rotating ring, 22 Sliding cylinder, 221 Antenna placement shell, 31 Slot, 32 Through opening, 33 Limiting rod, 34 Locking block, 35 Spring 2, 41 Limiting ring, 411 Adaptor slot, 42 Drive block, 43 Slide groove, 44 Slider, 5 Blocking block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-6A near-field wake-up controller for a manhole cover using Bluetooth wireless technology includes a controller body 1. A connecting rod 11 is fixed to the side wall of the controller body 1. The connecting rod 11 is hollow and allows for the insertion of a wire. A sleeve 21 is fixed to the connecting rod 11. A sliding cylinder 22 is slidably connected to the inside of the sleeve 21. An antenna housing 221 is fixed to the top of the sliding cylinder 22. The Bluetooth signal receiving antenna in the controller body 1 is placed in the antenna housing 221. During installation, the controller is fixed to the lower surface of the manhole cover with bolts. The manhole cover has holes for opening the cover, assisting drainage, and ventilation. During installation, the antenna housing 221 is placed below and directly opposite the holes. The sleeve 21 has a telescopic mechanism inside to control the extension and retraction of the sliding cylinder 22. When the sliding cylinder 22 retracts, the antenna placement shell 221 is placed below the hole in the manhole cover, which will not affect the normal passage above the manhole cover. When the controller signal reception is poor, the telescopic mechanism extends the antenna placement shell 221 above the hole. In this way, the antenna is located above the manhole cover, reducing the shielding effect of the manhole cover on the signal, thereby ensuring the stable transmission and reception of the Bluetooth signal. In addition, the antenna placement shell 221 has a spherical structure, so rainwater above the manhole cover will not accumulate on the antenna placement shell 221. At the same time, the gas in the well can also move steadily upward along the surface of the antenna placement shell 221 and be discharged from the hole. In addition, the sleeve 21, the sliding cylinder 22, and the antenna placement shell 221 are all made of high-strength engineering plastics such as polycarbonate and polyphenylene sulfide, which ensures the stability of the device structure and meets the requirements of signal transmission.

[0023] Furthermore, the telescopic mechanism includes a limiting ring 41 fixedly connected to the inner side of the sleeve 21. The inner side of the limiting ring 41 is inclined, that is, the cross-section of one side of the limiting ring 41 is a right-angled triangle. The sleeve 21 is provided with two driving blocks 42. The driving blocks 42 are slidably connected to the inner side of the sleeve 21 through guide members. The top and bottom of the driving blocks 42 are provided with inclined surfaces. The inner bottom surface of the limiting ring 41 has two fitting grooves 411. The fitting grooves 411 are adapted to the upper half of the driving blocks 42. When the driving blocks 42 contact the limiting ring 41, the upper half of the driving blocks 42, including the inclined surface at the top, is located inside the fitting grooves 411. At this time, the inner side of the limiting ring 41 and the inclined surface at the bottom of the driving blocks 42 together form a complete included angle surface. The sliding cylinder 22 has two slots 31 on its side wall. A locking block 34 is slidably connected inside the slots 31. A spring 35 is provided between the locking block 34 and the inner side of the slot 31. The side wall of the locking block 34 also has an inclined surface. A spring 212 is provided between the bottom of the sliding cylinder 22 and the inner bottom surface of the sleeve 21. Additionally, the guide includes a groove 43 and a slider 44. The groove 43 is located inside the sleeve 21, and the slider 44 is slidably connected within the groove 43 and fixed to the driving block 42. Furthermore, both the slider 44 and the groove 43 have T-shaped cross-sections to ensure the limiting effect of the groove 43 on the slider 44 and the stability of the device structure. Under this design, the device operates in two states: the first is... In the retraction operation of the antenna placement housing 221, the operator uses a finger or thin rod to press down the sliding cylinder 22 through the hole in the manhole cover. The locking block 34 first contacts the limiting ring 41. Under the inclined setting of the inner side of the limiting ring 41, the locking block 34 retracts into the locking groove 31. When the locking block 34 moves below the limiting ring 41, it is reset and extended again under the action of the second spring 35. At this time, the first spring 212 is in a compressed state, and the first spring 212 makes the top of the locking block 34 abut against the bottom of the limiting ring 41, thus fixing the position of the sliding cylinder 22. The second working state is that the antenna placement housing 221 extends out of the hole. In the first state, the sliding cylinder 22 is pressed down further, and the locking block 34 contacts the driving block 42. Under the action of the top slope of block 42, the locking block 34 retracts into the slot 31 until it moves below the driving block 42. Then, the sliding cylinder 22 is released. Under the action of spring 212, the sliding cylinder 22 and the locking block 34 move upward quickly. During the upward movement, the locking block 34 abuts against the driving block 42 and drives the driving block 42 to move upward until the top of the driving block 42 is locked into the adapter slot 411. At this time, the limiting ring 41 restricts the movement of the driving block 42. Under the action of the bottom slope of the driving block 42, the locking block 34 retracts into the slot 31 again until it moves to the inclined inner position of the limiting ring 41. Then, under the action of spring 35, it extends. At this time, the compressed spring 212 is released, and the antenna placement shell 221 can extend.

[0024] Furthermore, a fixing plate 211 is fixed to the inner bottom surface of the sleeve 21. The fixing plate 211 has a rectangular cross-section and is coaxially arranged with the sliding cylinder 22. A through-hole 32 is provided on the inner side of the slot 31, which is connected to the inside of the sliding cylinder 22. A limit rod 33 is fixed on the side wall of the locking block 34 facing the central axis of the sliding cylinder 22. The limit rod 33 passes through the through-hole 32. A rotating ring 213 is rotatably connected to the bottom of the sliding cylinder 22. The top end of the spring 212 is fixed to the rotating ring 213. Two blocking blocks 5 are fixed to the inner side of the sleeve 21. 5 is located between the limiting ring 41 and the driving block 42. Viewed from above, the blocking block 5 and the driving block 42 are offset. In the initial state, the two limiting rods 33 are along the length of the fixing plate 211, and the locking block 34 remains extended. When the sliding cylinder 22 moves down until the locking block 34 contacts the blocking block 5, the fixing plate 211 blocks the retraction of the locking block 34, preventing the sliding cylinder 22 from moving further down, i.e., the antenna housing 221 cannot extend. At this point, rotating the sliding cylinder 22 ninety degrees causes the locking block 34 to be offset from the blocking block 5. Simultaneously, as... Figure 5 As shown in the diagram, the two limiting rods 33 are located in the width direction of the fixed plate 211. At this time, there is a moving space between the limiting rods 33 and the fixed plate 211, which ensures that the locking block 34 can retract normally when it encounters the driving block 42. In addition, the top of the antenna placement shell 221 is provided with a screw head. The shape of the screw head can be specially designed and matched with a screw cap. This design can play an anti-theft role and prevent non-operating personnel from controlling the position of the antenna.

[0025] The specific working principle of this utility model is as follows:

[0026] When the antenna needs to be retracted, first use a tool to press down the sliding cylinder 22 through the hole in the manhole cover. The locking block 34 slides into the slot 31 along the inclined surface inside the limiting ring 41 and compresses the second spring 35. When the locking block 34 passes the limiting ring 41 and moves down to below it, the second spring 35 pushes the locking block 34 to reset and extend. At this time, the first spring 212 is in a compressed state, the top of the locking block 34 abuts against the bottom of the limiting ring 41, and the sliding cylinder 22 is stably locked in the retracted position. This is the completed state of the retraction operation.

[0027] When maintenance personnel need to perform Bluetooth communication but the signal is poor due to metal shielding, if an antenna extension operation is required after the antenna is retracted, the sliding cylinder 22 needs to be pressed down further. However, at this time, the locking block 34 will be blocked by the blocking block 5 during the downward contact with the driving block 42, and cannot move down. Specifically, since the limiting rod 33 and the fixing plate 211 are aligned in the length direction, when the locking block 34 attempts to compress the spring 35 to pass the blocking block 5, the fixing plate 211 will block the lateral displacement of the limiting rod 33, causing the locking block 34 to be unable to retract and the sliding cylinder 22 to be unable to move down further. This is a safety blocking mechanism to prevent the antenna from accidentally popping out under unauthorized or non-standard operation.

[0028] To remove this restriction, maintenance personnel need to rotate the sliding cylinder 22 by 90° during the downward pressing process, so that the relative position of the limiting rod 33 and the fixed plate 211 changes from alignment in the length direction to alignment in the width direction, thereby creating a lateral movement space between the limiting rod 33 and the fixed plate 211. At this time, the locking block 34 and the blocking block 5 are misaligned in the vertical direction, and the sliding cylinder 22 can continue to move downward. Then, the locking block 34 retracts into the locking groove 31 under the action of the inclined surface at the top of the driving block 42, until the locking block 34 passes over the driving block 42 and is located below it. Then, the external force is released, the spring 212 releases its stored energy, and pushes the sliding cylinder 22 downward. As the cylinder 22 moves upward rapidly, the locking block 34 abuts against the driving block 42 and pulls it up together until the top of the driving block 42 is embedded in the adapter groove 411 of the limiting ring 41. As the sliding cylinder 22 continues to move upward, under the guidance of the inclined bottom surface of the driving block 42 and the inclined inner side of the limiting ring 41, the locking block 34 is pressed back into the locking groove 31 until the locking block 34 moves above the limiting ring 41 and is reset and extended under the action of the second spring 35. At this time, the elastic energy stored in the first spring 212 is completely released, and the antenna rises above the manhole cover, leaving the metal shielding area, and realizing efficient Bluetooth signal transmission.

[0029] This design allows the antenna to extend and retract by pressing, rotating, and releasing, ensuring operational reliability and effectively preventing malfunctions. The entire process does not require opening the manhole cover, significantly improving maintenance efficiency and safety.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A manhole cover controller that utilizes Bluetooth for near-field wake-up, characterized in that, The controller includes a controller body (1), a connecting rod (11) is fixed to the side wall of the controller body (1), a sleeve (21) is fixed to the connecting rod (11), a sliding cylinder (22) is slidably connected inside the sleeve (21), an antenna placement shell (221) for placing a receiving signal antenna is fixed to the top of the sliding cylinder (22), and a telescopic mechanism is provided inside the sleeve (21) for controlling the extension and retraction of the sliding cylinder (22).

2. A manhole cover controller using Bluetooth for short-range wake-up according to claim 1, characterized in that, The telescopic mechanism includes a limiting ring (41) fixedly connected to the inner side of the sleeve (21). The inner side of the limiting ring (41) is inclined. The sleeve (21) has two driving blocks (42) inside. The driving blocks (42) are slidably connected to the inner side of the sleeve (21) through guide members. The top and bottom of the driving blocks (42) are both provided with inclined surfaces. The inner bottom surface of the limiting ring (41) has two matching grooves (411). The matching grooves (411) are adapted to the upper half of the driving blocks (42). The side wall of the sliding cylinder (22) is provided with two slots (31). The slots (31) are slidably connected with a locking block (34). The locking block (34) and the inner side of the slot (31) are provided with a second spring (35). The bottom of the sliding cylinder (22) and the inner bottom surface of the sleeve (21) are provided with a first spring (212).

3. A manhole cover controller using wireless Bluetooth for short-range wake-up according to claim 2, characterized in that, A fixing plate (211) is fixed on the inner bottom surface of the sleeve (21). The cross-section of the fixing plate (211) is rectangular. A through-hole (32) is opened on the inner side of the slot (31). The through-hole (32) is connected to the inside of the sliding cylinder (22). A limit rod (33) is fixed on the side wall of the block (34) facing the central axis of the sliding cylinder (22). The limit rod (33) passes through the through-hole (32). A rotating ring (213) is rotatably connected to the bottom of the sliding cylinder (22). The top end of the spring (212) is fixed to the rotating ring (213). Two blocking blocks (5) are fixed on the inner side of the sleeve (21). The blocking blocks (5) are located between the limit ring (41) and the driving block (42), and the blocking blocks (5) and the driving block (42) are staggered.

4. A manhole cover controller using wireless Bluetooth for short-range wake-up according to claim 3, characterized in that, The guide includes a groove (43) and a slider (44). The groove (43) is opened on the inner side of the sleeve (21). The slider (44) is slidably connected in the groove (43) and is fixed to the drive block (42).

5. A manhole cover controller using wireless Bluetooth for short-range wake-up according to claim 4, characterized in that, Both the slider (44) and the groove (43) have a T-shaped cross-section.

6. A manhole cover controller using wireless Bluetooth for short-range wake-up according to claim 5, characterized in that, The antenna housing (221) has a spherical structure on the outside.

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