A series inclinometer

Abstract

This utility model discloses a series-connected inclinometer, belonging to the field of civil engineering technology. It includes a standard section for connecting inclinometers. A mounting base is bolted to the top of the standard section. A sensor housing is mounted on the top of the mounting base. Connection holes are provided on both sides of the sensor housing. A sensor cable adapted to the connection hole is installed inside the cavity of each connection hole, and the sensor cable is sealed to the connection hole with potting compound. An inclinometer PCB board is bolted to the cavity of the sensor housing, and the inclinometer PCB board is connected to the sensor cable. Several sets of sensor housings are provided, and these sets are connected by sensor cables. This design simplifies the installation of the inclinometer, reduces the installation difficulty, and minimizes the impact on monitoring accuracy.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering technology, specifically to a series inclinometer. Background Technology

[0002] The most commonly used equipment in civil engineering is the inclinometer. Currently, inclinometers are widely used for monitoring internal displacement of foundation pit retaining structures, slope landslide monitoring, dams and foundation walls, etc. Its application scenarios are wide and the demand is large. The requirements for monitoring points are also high. At present, two main methods are used: manual detection and automated online monitoring. In the future, the demand for automated online monitoring will increase.

[0003] In the on-site installation phase, existing inclinometers require prefabricated inclinometer tubes embedded in concrete structures or backfilling with expansive soil after drilling to fix the foundation before individual sensor installation can proceed. Since each sensor exists independently, a large number of auxiliary materials such as connecting rods, lead screws, and universal joints must be used during installation to achieve mechanical connection and positioning in order to ensure the relative positional accuracy between sensors. When the number of sensors increases, this multi-node mechanical connection method will cause the installation steps to increase exponentially, which not only significantly increases the installation difficulty but also easily affects the monitoring accuracy due to the accumulation of connection errors. Therefore, we need to propose a series inclinometer. Utility Model Content

[0004] The purpose of this invention is to provide a series-connected inclinometer. By combining the sensor housing, the inclinometer PCB board, and the mounting base, a standard unit of the inclinometer sensor can be easily assembled. Inclinometer units can be prefabricated according to the actual on-site monitoring requirements. Each inclinometer unit is mounted on a standard section, and then connected to the other units via sensor cables, facilitating the transport of the inclinometer to the installation site. During on-site installation, the sensor can be assembled and lowered into the inclinometer holes section by section, in conjunction with the standard section. This solution simplifies the installation operation of the inclinometer, reduces the installation difficulty, and minimizes the impact on monitoring accuracy, thus addressing the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a series inclinometer, comprising a standard section for connecting inclinometers, a mounting base bolted to the top of the standard section, a sensor housing provided at the top of the mounting base, connection holes on both sides of the sensor housing, a sensor cable adapted to the connection hole being provided in the inner cavity of the connection hole, and the sensor cable being sealed to the connection hole by potting compound, an inclinometer PCB board bolted to the inner cavity of the sensor housing, and the inclinometer PCB board being connected to the sensor cable wire, and several sets of sensor housings being provided, the several sets of sensor housings being connected to each other by sensor cables.

[0006] Preferably, the surface of the mounting base is provided with a placement groove that is adapted to the sensor housing, the inner cavity of the placement groove is fixed to the bottom end of the sensor housing with bolts, and the surface of the mounting base is provided with a U-shaped groove, the position of the U-shaped groove being aligned with the position of the connection hole.

[0007] Preferably, the sensor housing includes an upper shell and a lower shell, and a disassembly and assembly structure is provided between the upper shell and the lower shell for easy disassembly and assembly. The upper shell and the lower shell are connected through the disassembly and assembly structure.

[0008] Preferably, the disassembly and assembly structure includes an adjustment groove formed on the surface of the lower shell, an adjustment seat adapted to the adjustment groove is provided in the inner cavity of the adjustment groove, a push rod is fixedly connected to one end of the adjustment seat, and the push rod passes through the adjustment groove and extends to the outside of the lower shell, a locking block is fixedly connected to the top of the adjustment seat, and a locking groove adapted to the locking block is formed on the surface of the upper shell.

[0009] Preferably, both ends of the adjustment seat are integrally formed with support blocks, and the surface of the support blocks is slidably connected to the inner cavity of the adjustment groove.

[0010] Preferably, the surface of the adjusting seat has a through hole, and a support rod is slidably inserted into the inner cavity of the through hole of the adjusting seat. Both ends of the support rod are fixedly connected to the inner cavity of the adjusting groove, and a spring is sleeved on the outer surface of the support rod.

[0011] Preferably, the card block is L-shaped, and the end of the card block near the card slot has a beveled surface.

[0012] Preferably, a sealing plate is integrally formed on the lower surface of the upper shell, the sealing plate is arranged in a square shape, a sealing gasket is bonded and fixed to the inner side wall of the sealing plate, and a sealing groove adapted to the sealing gasket is formed on the upper surface of the lower shell.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model provides a series-connected inclinometer. By combining the sensor housing, the inclinometer PCB board, and the mounting base, a standard unit of the inclinometer sensor can be easily assembled. Through the setting of the standard section and the sensor cable, the assembled inclinometer unit can be installed on the standard section. Then, the inclinometer units on the standard section are connected through the sensor cable. During installation, the inclinometer can be assembled and lowered into the inclinometer hole section by section through the standard section. The above scheme simplifies the installation operation of the inclinometer, reduces the installation difficulty of the inclinometer, and reduces the impact on monitoring accuracy.

[0015] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a circuit block diagram of the inclinometer of this utility model;

[0017] Figure 2 This is a partial structural diagram of the inclinometer unit of this utility model installed on a standard section;

[0018] Figure 3 This is a schematic diagram of the structure of the mounting base and sensor housing after disassembly.

[0019] Figure 4 This is a top view of the lower shell of this utility model.

[0020] Figure 5 This is a schematic diagram of a partial cross-section of the sensor housing of this utility model;

[0021] Figure 6 This is a structural schematic diagram of the upper shell of this utility model viewed from below.

[0022] In the diagram: 1. Standard section; 2. Mounting base; 3. Sensor housing; 31. Upper shell; 32. Lower shell; 33. Adjustment groove; 34. Adjustment base; 35. Locking block; 36. Locking slot; 5. Sensor cable; 6. Inclinometer PCB board; 7. Placement groove; 8. U-shaped groove; 9. Support block; 10. Support rod; 11. Spring; 12. Sealing plate; 13. Sealing groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6This utility model provides a technical solution: a series inclinometer, including a standard section 1 for connecting inclinometers, a mounting base 2 fixed to the top of the standard section 1 by bolts, a sensor housing 3 provided at the top of the mounting base 2, connection holes 4 on both sides of the sensor housing 3, a sensor cable 5 adapted to the connection hole 4 provided in the inner cavity of the connection hole 4, and the sensor cable 5 and the connection hole 4 are sealed and connected by potting compound, an inclinometer PCB board 6 fixed to the inner cavity of the sensor housing 3 by bolts, and the inclinometer PCB board 6 is wired to the sensor cable 5, and several groups of sensor housings 3 are provided, and the several groups of sensor housings 3 are connected by sensor cables 5;

[0025] First, the inclinometer PCB board 6 is installed inside the sensor housing 3. Then, the sensor housing 3 is installed on the mounting base 2. The PCB board, sensor housing 3, and mounting base 2 are combined to form a simple standard unit of the inclinometer sensor. According to the actual field monitoring quantity requirements, inclinometer unit groups are prefabricated. Then, the prefabricated inclinometer unit groups are installed on the standard section 1 through the mounting base 2. Finally, the series-connected inclinometer is connected to the external measuring host through the cable connector. Then, according to the installation position, the standard section 1 is assembled section by section and lowered into the inclinometer hole for installation. The above scheme simplifies the installation operation of the inclinometer, reduces the installation difficulty of the inclinometer, and reduces the impact on monitoring accuracy.

[0026] The surface of the mounting base 2 has a placement groove 7 that fits the sensor housing 3. The inner cavity of the placement groove 7 is bolted to the bottom of the sensor housing 3. The surface of the mounting base 2 has a U-shaped groove 8, and the position of the U-shaped groove 8 is aligned with the position of the connection hole 4. The placement groove 7 on the surface of the mounting base 2 fits the sensor housing 3 and is used for precise positioning and installation of the sensor housing 3. The bottom of the sensor housing 3 is fixed to the inner cavity of the placement groove 7 by bolts. The position of the U-shaped groove is aligned with the connection hole 4, providing space and channel for the connection of the sensor cable 5, avoiding compression or obstruction during cable connection. The placement groove 7 can ensure the accuracy and stability of the sensor housing 3 installation, reduce the impact of installation deviation on monitoring, facilitate the connection of the sensor cable 5, make the cable connection smoother, reduce the risk of cable damage, and also facilitate later maintenance and repair.

[0027] The sensor housing 3 includes an upper housing 31 and a lower housing 32. A disassembly and assembly structure is provided between the upper housing 31 and the lower housing 32 for easy assembly and disassembly. The upper housing 31 and the lower housing 32 are connected by the disassembly and assembly structure, and the upper housing 31 and the lower housing 32 can be quickly assembled and disassembled through the disassembly and assembly structure, which facilitates the disassembly and assembly of the sensor housing 3 and facilitates the installation, replacement and maintenance of the inclinometer PCB board inside the sensor housing 3.

[0028] The disassembly and assembly structure includes an adjustment groove 33 on the surface of the lower shell 32. An adjustment seat 34 adapted to the adjustment groove 33 is provided in the inner cavity of the adjustment groove 33. A push rod is fixedly connected to one end of the adjustment seat 34, and the push rod passes through the adjustment groove 33 and extends to the outside of the lower shell 32. A locking block 35 is fixedly connected to the top of the adjustment seat 34. A locking groove 36 adapted to the locking block 35 is provided on the surface of the upper shell 31. Pushing the push rod can drive the adjustment seat 34 to slide in the adjustment groove 33, and the locking block 35 on the adjustment seat 34 moves accordingly. When the locking block 35 is inserted into the inner cavity of the locking groove 36, the upper shell 31 and the lower shell 32 can be fixed together, and the assembly work between the upper shell 31 and the lower shell 32 can be completed. When the locking block 35 is removed from the inner cavity of the locking groove 36, the upper shell 31 and the lower shell 32 can be released and separated.

[0029] Both ends of the adjusting seat 34 are integrally formed with support blocks 9, and the surface of the support blocks 9 is slidably connected to the inner cavity of the adjusting groove 33. By setting the support blocks 9, the two sides of the adjusting seat 34 can be supported, providing a guiding function for the adjusting seat 34 and improving the stability of the adjusting seat 34 when it moves in the inner cavity of the adjusting groove 33.

[0030] The surface of the adjusting seat 34 has a through hole, and a support rod 10 is inserted and slidably connected to the inner cavity of the through hole of the adjusting seat 34. Both ends of the support rod 10 are fixedly connected to the inner cavity of the adjusting groove 33. A spring 11 is sleeved on the outer surface of the support rod 10. With the setting of the spring 11, the adjusting seat 34 can be pushed to move towards the slot 36, so that the adjusting seat 34 continuously drives the locking block 35 to move towards the slot 36, thereby improving the stability of the locking block 35 and the slot 36 after combination.

[0031] The lower surface of the upper shell 31 is integrally formed with a sealing plate 12, which is arranged in a U-shape. A sealing gasket is bonded and fixed to the inner side wall of the sealing plate 12. The upper surface of the lower shell 32 is provided with a sealing groove 13 that matches the sealing gasket. When the upper shell 31 and the lower shell 32 are closed, the sealing gasket is embedded in the sealing groove 13 to form a sealing structure, preventing water, dust and other impurities from entering the shell. This effectively seals the shell and protects the inclinometer PCB board and other components inside from the influence of the external environment. It also improves the waterproof and dustproof performance of the sensor, extends the service life of the equipment, and ensures the stable operation of the monitoring work.

[0032] The locking block 35 is L-shaped, and the end of the locking block 35 near the slot 36 has a beveled surface. When installing the upper shell 31 and the lower shell 32, the beveled surface contacts the edge of the slot 36. As the upper and lower shells 32 close, the beveled surface is squeezed, which allows the adjusting seat 34 to slide automatically, so that the locking block 35 can smoothly enter the slot 36, achieving quick installation. The beveled surface design makes the installation of the upper shell 31 and the lower shell 32 more convenient and labor-saving, without the need for precise alignment of the locking block 35 and the slot 36, reducing the installation difficulty and improving the installation efficiency. At the same time, the L-shaped locking block 35 can ensure the firmness of the connection between the upper and lower shells 32.

[0033] In practical use: First, install the inclinometer PCB board 6 inside the sensor housing 3, and then install the sensor housing 3 on the mounting base 2. Combine the PCB board, sensor housing 3 and mounting base 2 to form a simple standard unit of inclinometer sensor. According to the actual field monitoring quantity requirements, prepare inclinometer unit groups in advance. Then, install the prepared inclinometer unit groups on the standard section 1 through the mounting base 2. Next, assemble the standard section 1 section by section according to the installation position and lower it into the inclinometer hole for installation. The above scheme simplifies the installation operation of the inclinometer, reduces the installation difficulty of the inclinometer, and reduces the impact on monitoring accuracy.

[0034] The specific implementation method of this system is as follows:

[0035] Inclinometer PCB Board 6: Since the MEMS accelerometer chip is a vibration-sensitive element, the PCB design must ensure that the chip is positioned close to the fastening screws. If the MEMS chip is installed in a location without screw support, the PCB's vibration will not be suppressed, leading to measurement errors. A two-stage surge protection circuit consisting of a GDT gas discharge tube, decoupling components, and a TVS diode can be used to improve system reliability. The system ground of the signal measurement circuit is connected to the surge protection ground (i.e., the metal part connected to earth) through resistors and capacitors. The entire circuit needs to consider low-power design because the power supply of the series-connected inclinometer is also series-connected. The more inclinometer units there are and the higher their power consumption, the faster the power supply voltage on the bus will drop, thus affecting the total number of inclinometer units that can be connected in series on the bus and the total measurement length. Communication can be achieved using RS485 or CAN. In order to further improve system reliability, the power supply and RS485 / CAN interface of each inclinometer unit can be designed to be fully isolated. This way, if a sensor on the serial inclinometer bus fails, it will not affect the operation of other sensors, thus improving system reliability.

[0036] Sensor housing 3: Can be made of stainless steel, such as 304 or 316L stainless steel. Sensor housing 3 provides a certain degree of strength protection for the circuit board and can also transfer surge energy to the ground. After the inclinometer PCB board 6 is fixed inside the sensor housing 3, potting compound is poured in. Sensor housing 3 can also be a semi-open housing.

[0037] Sensor cable 5: A four-core shielded cable is used. The shield is connected to the surge protection ground of the inclinometer PCB board 6 inside each inclinometer unit. In this way, the entire shield is also integrated with the metal mechanical parts of the sensor, improving the overall electromagnetic interference resistance.

[0038] Encapsulating Adhesive: When selecting a rigid encapsulating adhesive for sealing PCB circuits, factors such as material type (e.g., epoxy resin, polyurethane), environmental resistance, thermal properties, electrical properties, adhesive properties, processing properties, compliance with industry standards, and cost-effectiveness should be comprehensively considered to ensure the stability and reliability of the adhesive in the working environment and provide effective sealing and protection.

[0039] Standard Section 1: Generally, each standard section 1 has a fixed length of 1m or 2m. On each standard section 1, according to the requirements of soil displacement monitoring accuracy and monitoring depth, several sensor mounting bases 2 can be evenly arranged. The shape of these bases is a long strip of thin metal plate. Their main functions are: to fix the inclinometer unit, to bear the vertical tension of the series inclinometer (when multiple inclinometers are vertically placed into the inclinometer hole, to bear the total weight of the entire sensor group), and to facilitate standardized production and transportation. Compared with the traditional series inclinometer, the standard section is equivalent to simplifying the connecting rod, lead screw, universal joint, guide wheel and other components into a metal base plate.

[0040] Sensor mounting base 2: When leaving the factory, it is fixed on the standard section 1 according to the monitoring interval requirements. When installing the inclinometer unit on site, put the inclinometer unit into the sensor mounting base 2 and tighten the screws.

[0041] Cable connector: Due to the presence of water inside the inclinometer hole, an aviation connector with IP68 protection rating can be used to connect to the external host.

[0042] The series inclinometer will eventually be connected to an external host via a cable connector. The host has RS485 / CAN communication capability and the ability to supply power to the series inclinometer. The host can remotely connect to a monitoring platform and actively read the data from the series inclinometer and report it to the remote monitoring platform according to the measurement requirements.

[0043] The on-site installation steps for the tandem inclinometer are as follows: First, prepare the tandem inclinometer and several standard sections 1; then, install the inclinometer unit on the sensor mounting base 2 on the first and second standard sections 1; subsequently, place the first standard section 1 into the inclinometer hole and suspend it at the inclinometer nozzle using a temporary limiting device; then, connect the next standard section 1 with the inclinometer unit installed with fastening screws and continue to lower it, connecting the standard sections 1 in sequence according to the same steps.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A series-connected inclinometer, characterized in that, include: The standard section (1) is used to connect the inclinometer. The top of the standard section (1) is connected to the mounting base (2). The top of the mounting base (2) is provided with a sensor housing (3). Both sides of the sensor housing (3) are provided with connection holes (4). The inner cavity of the connection hole (4) is provided with a sensor cable (5) that is compatible with the connection hole (4). The sensor cable (5) and the connection hole (4) are sealed and connected by potting compound. The inner cavity of the sensor housing (3) is provided with an inclinometer PCB board (6), and the inclinometer PCB board (6) is connected to the sensor cable (5) wire. The sensor housing (3) is provided with several groups, and the several groups of sensor housings (3) are connected by sensor cables (5).

2. The series inclinometer according to claim 1, characterized in that: The surface of the mounting base (2) is provided with a placement groove (7) that is compatible with the sensor housing (3), and the inner cavity of the placement groove (7) is fixed to the bottom end of the sensor housing (3) with bolts. The surface of the mounting base (2) is provided with a U-shaped groove (8), and the position of the U-shaped groove (8) is aligned with the position of the connecting hole (4).

3. The series inclinometer according to claim 1, characterized in that: The sensor housing (3) includes an upper shell (31) and a lower shell (32), and a disassembly and assembly structure is provided between the upper shell (31) and the lower shell (32) for easy disassembly and assembly.

4. A series inclinometer according to claim 3, characterized in that: The disassembly and assembly structure includes an adjustment groove (33) opened on the surface of the lower shell (32) and an adjustment seat (34) adapted to the adjustment groove (33). One end of the adjustment seat (34) is fixedly connected to a push rod, and the push rod passes through the adjustment groove (33) and extends to the outside of the lower shell (32). The top end of the adjustment seat (34) is fixedly connected to a locking block (35). The surface of the upper shell (31) is provided with a slot (36) that is compatible with the card block (35).

5. A series inclinometer according to claim 4, characterized in that: Both ends of the adjustment seat (34) are integrally formed with support blocks (9), and the surface of the support blocks (9) is slidably connected to the inner cavity of the adjustment groove (33).

6. A series inclinometer according to claim 5, characterized in that: The surface of the adjusting seat (34) is provided with a through hole, and a support rod (10) is inserted and slidably connected to the inner cavity of the through hole of the adjusting seat (34). Both ends of the support rod (10) are fixedly connected to the inner cavity of the adjusting groove (33), and a spring (11) is sleeved on the outer surface of the support rod (10).

7. A series inclinometer according to claim 4, characterized in that: The card block (35) is L-shaped, and the end of the card block (35) near the card slot (36) has a beveled surface.

8. A series inclinometer according to claim 4, characterized in that: The lower surface of the upper shell (31) is integrally formed with a sealing plate (12), and the sealing plate (12) is arranged in a square shape. A sealing gasket is bonded and fixed to the inner side wall of the sealing plate (12). The upper surface of the lower shell (32) is provided with a sealing groove (13) that is compatible with the sealing gasket.

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