Structural body settlement displacement monitoring device based on multi-sensor fusion

Abstract

The utility model discloses a structural body settlement displacement monitoring device based on multi-sensor fusion, which comprises a horizontal displacement monitor, a guide wheel assembly is integrated in the horizontal displacement monitor, the horizontal displacement monitor is connected with a stainless steel connecting pipe fitting, a settlement displacement meter is sleeved on the stainless steel connecting pipe fitting, and the stainless steel connecting pipe fitting is connected with the guide wheel assembly. The settlement displacement meter is mounted at the bottom of the horizontal displacement monitor, and the horizontal displacement monitor, the settlement displacement meter and the stainless steel connecting pipe fitting form a settlement monitoring unit of the settlement displacement monitoring device; and the data line is connected with the acquisition instrument. On the basis of a traditional settlement displacement sensor, the horizontal displacement monitor is additionally arranged, the horizontal displacement and settlement measurement functions are achieved, and more comprehensive monitoring data can be provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of settlement displacement monitoring, especially to a structure settlement displacement monitoring device based on multi-sensor fusion. BACKGROUND

[0002] With the acceleration of urbanization and the expansion of infrastructure, the demand for safety monitoring of building structures, geological environments and major projects (such as bridges, dams, subways, high-rise buildings, etc.) is increasingly urgent. Settlement displacement is one of the core indicators for evaluating structural stability and predicting geological disasters (such as landslides and ground subsidence). Long-term and accurate settlement monitoring can effectively prevent engineering accidents, reduce maintenance costs, and protect people's lives and property safety.

[0003] Traditional settlement monitoring methods mainly rely on manual measurement tools (such as leveling instruments and total stations) or single-point sensors (such as static leveling instruments and wire displacement meters). These methods have low efficiency, single function, poor environmental adaptability, and high maintenance costs. SUMMARY

[0004] The utility model aims at solving the above technical problem, and provides a structure settlement displacement monitoring device based on multi-sensor fusion.

[0005] In order to achieve the above technical purpose and meet the above technical requirements, the utility model adopts the following technical scheme: a structure settlement displacement monitoring device based on multi-sensor fusion, comprising a horizontal displacement monitor, a guide wheel assembly is integrally arranged inside the horizontal displacement monitor, the horizontal displacement monitor is connected with a stainless steel connecting pipe, the settlement displacement meter is sleeved on the stainless steel connecting pipe, the settlement displacement meter is installed at the bottom of the horizontal displacement monitor, the horizontal displacement monitor, the settlement displacement meter, and the stainless steel connecting pipe constitute a settlement monitoring unit of the settlement displacement monitoring device, the settlement displacement monitoring device comprises a plurality of settlement monitoring units, which can realize the dual functions of horizontal displacement monitoring and settlement monitoring; and further comprising a data line connected with the acquisition instrument.

[0006] Preferably, the adjacent settlement monitoring units are connected by hoses, the settlement displacement monitoring device can be installed in sections or installed in one piece, and the whole is preassembled and placed in the installation position.

[0007] Preferably, the stainless steel connecting pipe is a hollow connecting rod with a wire slot reserved inside, one end of the RS485 data line is connected with the settlement displacement monitoring device, and the other end is connected to the acquisition instrument for communication.

[0008] Preferably, the horizontal displacement monitor measures horizontal displacement data, the settlement unit measures vertical settlement data, and the measurement data is sent to the acquisition instrument in real time.

[0009] Preferably, the horizontal displacement monitor is a high-precision flexible horizontal displacement monitor.

[0010] Compared with the traditional structure, the utility model has the advantages of:

[0011] 1. The utility model discloses a horizontal displacement monitor is added on the basis of the traditional settlement displacement sensor, has two measurement functions of horizontal displacement and settlement, and can provide more comprehensive monitoring data.

[0012] High-precision measurement: using high-precision sensors, measurement error is small, and strict requirements of precision in engineering can be met.

[0013] Compact structure, easy to install and maintain: the cover monitoring device integrates settlement displacement meter and horizontal displacement monitor, the settlement displacement meter is installed at the bottom of the horizontal displacement monitor, reduces the requirement of installation space, and is convenient for field installation;The design reduces the installation difficulty of the equipment, and is simple to maintain, convenient for long-term use.

[0014] Real-time data transmission: supporting wireless data transmission, facilitating remote monitoring and real-time data analysis, and improving work efficiency.

[0015] Strong anti-interference ability: the equipment can work stably in complex environment, has strong anti-interference ability, and is suitable for various severe conditions.

[0016] 2. The sampling linear array topology is composed of multiple segments, supports multi-angle dynamic change capture, and measures horizontal displacement, vertical settlement and composite deformation parameters, and eliminates the visual blind area of traditional single-point monitoring. Sensor nodes realize signal synchronous transmission through a wireless communication module or wired transmission, ensure the real-time and continuity of monitoring data. Data is uploaded to monitoring software or platform in real time through the instrument, and the operation and maintenance personnel can remotely call the displacement trend spectrum of each monitoring point through the monitoring software or platform, without manual intervention on site, and the labor intensity is significantly reduced. Modular design is compatible with complex scene deployment, and is suitable for long-term stability evaluation of key parts such as bridge expansion joints and building foundations. Anti-interference protection device is equipped to improve the reliability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is an installation schematic sectional view of the utility model;

[0019] In the drawing: 1. settlement displacement meter, 2. stainless steel connecting pipe fitting, 3. horizontal displacement monitor, 4. guide wheel assembly, 5. data line, 6. hose. DETAILED DESCRIPTION

[0020] The utility model discloses further illustrate below.

[0021] Refer to the attached Figure 1 A kind of structural body settlement displacement monitoring device based on multi-sensor fusion, including horizontal displacement monitor 3, the horizontal displacement monitor 3 is integrally arranged with guide pulley assembly 4 inside, the horizontal displacement monitor 3 is connected with stainless steel connecting pipe fitting 2, the settlement displacement meter 1 is sleeved on stainless steel connecting pipe fitting 2, settlement displacement meter 1 is installed at the bottom of horizontal displacement monitor 3, the horizontal displacement monitor 3, settlement displacement meter 1, stainless steel connecting pipe fitting 2 constitute a settlement monitoring unit of settlement displacement monitoring device, the settlement displacement monitoring device includes several settlement monitoring units, can realize the dual function of horizontal displacement monitoring and settlement monitoring;Still include data line 5, data line 5 is connected with acquisition instrument.

[0022] In the preferred embodiment, adjacent settlement monitoring units are connected by hose 6, this structure is relatively flexible, from the first settlement monitoring unit to the last settlement monitoring unit can be adjusted independently, and is more expandable, and the measurement range is also wider. Settlement displacement monitoring device can be installed in sections, or installed in one piece, and is placed in the installation position after being preassembled into a whole.

[0023] In the preferred embodiment, the horizontal displacement monitor 3 is a high-precision horizontal displacement monitor.

[0024] In the preferred embodiment, the stainless steel connecting pipe fitting 2 is a hollow connecting rod with a wire slot reserved inside, and the RS485 data line 5 is connected to the settlement displacement monitoring device at one end and to the acquisition instrument at the other end for communication.

[0025] In the preferred embodiment, the horizontal displacement monitor 3 measures horizontal offset data, and the settlement unit measures vertical settlement data, and the measurement data is sent to the acquisition instrument in real time.

[0026] In the preferred embodiment, the horizontal displacement monitor 3 adopts a stainless steel shell with an integrated guide pulley assembly 4 inside, the guide pulley assembly 4 includes a pulley, a pulley connecting block, and an inclination sensor, the guide pulley assembly 4 is threadedly connected to the through hole of the side wall of the stainless steel shell through bolts, when installed in the pipeline, the outer edge of the pulley is in rolling contact with the inner wall of the pipeline, forming a dynamic displacement response interface, so that the sensor can be normally used when installed in the pipeline.

[0027] The settlement monitoring unit adopts a high-precision displacement sensor, which has a wide range of 0-500mm, and is particularly suitable for long-term settlement monitoring requirements in large construction projects, transportation infrastructure and geological engineering. By using temperature compensation algorithm and redundant measurement technology, the measurement accuracy of ±0.02%FS (full scale) can be achieved within the working temperature range of-35℃ to +85℃, which is converted into an absolute error of not more than ±0.1mm, which can accurately capture the subtle settlement changes of millimeter level.

[0028] The stainless steel connecting pipe fitting 2 adopts 304 stainless steel pipe fitting with a diameter of about 12mm. The pipe fitting is pre-buried with RS485 communication line and power supply line inside. The cable interface is sealed and packaged with silica gel sleeve, meeting the IP65 level protection.

[0029] In specific implementation, the device is installed on a stable base surface to avoid vibration or severe external force interference, ensuring the accuracy of measurement data. The installation position is ensured not to be affected by climate, environment or external objects such as strong wind and rain accumulation. The hole is drilled in advance, and the verticality of the hole is measured using plumb. The drilling depth penetrates through the soft soil layer, is greater than the thickness of the foundation compression layer, and reaches the bedrock with a depth of 500mm-1000mm. The settlement hole has a diameter of 50-60mm. After drilling, a PVC wall protection sleeve is used to temporarily support the hole wall to prevent collapse.

[0030] Referring to the accompanying drawings Figure 2 According to the engineering design requirements, coordinate positioning is performed at the installation position, the center of the measurement point is marked on the ground surface, and a cross-shaped positioning auxiliary line is set to ensure the axial alignment accuracy of subsequent drilling and instrument installation. Hole diameter control: use a hydraulic rotary drill with a 55mm (preferably 50-60mm) diamond drill bit to open the hole. The lithology change during drilling is recorded in real time; depth requirement: the drilling penetrates through unstable strata such as soft soil layer and fill layer, and the depth needs to exceed the theoretical thickness of the foundation compression layer (calculated according to the "Code for Design of Building Foundation" GB50007), and penetrate into the bedrock surface below 500-1000mm; hole protection: after drilling is completed, a PVC wall protection sleeve is used to temporarily support the hole wall to prevent the risk of hole shrinkage and collapse. Before pulling out the drill bit, remove the residue at the bottom of the hole. The installation needs to be completed within 10 minutes after the drill bit is pulled out to avoid deformation of the hole wall due to long-term exposure.

[0031] One-time molding installation: the device components are pre-assembled as a whole, and then hoisted vertically into the hole after being tied with a nylon sling. The orientation of the pipe body is adjusted manually to ensure that the guide groove is aligned with the preset monitoring direction. After the lower end of the pipe body contacts the bedrock surface, cement mortar is poured into the hole, and after solidification, an integral anchoring structure is formed.

[0032] Segmental installation: the device is modularized and prefabricated in 1m / segment modulus, the quick connection type interface is used between adjacent pipe segments, the rubber sealing ring and the guide key are embedded in the interface, the axial tensile strength is ensured to be greater than 5kN, and the guide grooves are continuously aligned; a conical guide head is installed at the bottom of the first pipe body, and is manually lowered to the hole bottom; the subsequent pipe segments are pulled through the guide chain, are quickly inserted at the hole and the installed pipe segment, and are fixed by rotating the locking buckle. After all the pipe segments are installed, non-shrinkage cement slurry is injected through the pre-buried grouting pipe, and the grouting pressure is controlled at 0.3-0.5MPa, and the slurry rises to the hole overflow and then stops.

[0033] The device adopts a concealed installation process, and the sensing unit is integrated in the underground structure layer in a non-exposed arrangement mode. The built-in layout not only avoids spatial interference of surface construction activities, but also effectively enhances the protection of the equipment by isolating through the entity barrier, so that the sensor is free from external mechanical impact, temperature and humidity fluctuations and chemical corrosion. The concealed installation strategy simultaneously realizes double technical advantages: first, the spatial avoidance design eliminates the cross influence of the monitoring system and the construction of the aboveground building; second, relying on the structural packaging, the environmental exposure rate of the sensor core components is reduced by more than 80%, thereby prolonging the service period of the equipment by more than 15 years, and the IP65 protection level and the multi-layer shielding structure significantly improve the mechanical damage and electromagnetic interference performance.

[0034] The device can be connected and communicated with a node device, the node system supports multipoint distributed networking measurement, after the monitoring device realizes real-time data transmission to the node through the RS485 communication protocol, the node is uploaded to the computer terminal after being processed by the CPU. The computer is installed with a matching professional analysis software, the initial state of the sensor is input, the initial framework is constructed, and after the data collection is started, the settlement-time curve can be automatically generated, comparison is conducted, and the node collection instrument can be selected with a loudspeaker or through the audio of the computer terminal, and when the monitoring value exceeds the preset threshold value, the early warning mechanism can be triggered, a millimeter-level precision vertical displacement dynamic monitoring solution is provided for engineering scenes such as deep foundation pit construction, dam safety monitoring and track traffic foundation treatment, the safety of the engineering structure is effectively ensured, and the precise monitoring requirement is met.

[0035] The above embodiments of the utility model are only used to clearly illustrate the examples made by the utility model, but are not used to limit the protection scope of the utility model, and all equivalent technical solutions also belong to the scope of the utility model, and the patent protection scope of the utility model should be limited by each claim.

Claims

1. A multi-sensor fusion based structural settlement displacement monitoring device, characterized by: The horizontal displacement monitor (3) is internally provided with a guide wheel assembly (4), is connected with a stainless steel connecting pipe (2), and a settlement displacement meter (1) is sleeved on the stainless steel connecting pipe (2); the settlement displacement meter (1) is installed at the bottom of the horizontal displacement monitor (3); the horizontal displacement monitor (3), the settlement displacement meter (1) and the stainless steel connecting pipe (2) constitute a settlement monitoring unit of a settlement displacement monitoring device; the settlement displacement monitoring device comprises a plurality of settlement monitoring units and can realize double functions of horizontal displacement monitoring and settlement monitoring; and a data line (5) is connected with the acquisition instrument.

2. The multi-sensor fusion based structural settlement displacement monitoring apparatus as claimed in claim 1, wherein: The adjacent settlement monitoring units are connected through a hose (6), the settlement displacement monitoring device is installed in sections or is integrally formed and installed at one time, and is placed in an installation position after being integrally preassembled.

3. The multi-sensor fusion based structural settlement displacement monitoring apparatus as claimed in claim 1, wherein: The stainless steel connecting pipe (2) is a hollow connecting rod, internally has a wire slot, and an RS485 data line (5) is connected at one end with the settlement displacement monitoring device and at the other end with the acquisition instrument to communicate.

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