12results about "Hydrostatic levelling" patented technology

This utility model discloses a level instrument for monitoring the settlement of formwork in building engineering, belonging to the technical field of hydrostatic level instruments. It includes a liquid level cylinder, with a measuring rod axially fixed inside the cylinder. An electronic chamber is connected to the end of the measuring rod extending out of the liquid level cylinder. An inner cylinder is fixedly installed inside the liquid level cylinder, with a notch between the inner cylinder and the bottom wall of the liquid level cylinder to allow communication between them. A float, capable of sliding along the inside of the inner cylinder, is slidably mounted on the measuring rod. A first annular gap, 1mm to 2mm wide, is provided between the float and the inner wall of the inner cylinder. This utility model, by setting up an inner cylinder, creates a large viscous resistance to the vertical flow of liquid through the first annular gap between the inner cylinder and the float, effectively mitigating the impact of liquid disturbance on the stability of the float during construction. Furthermore, the inner cylinder can shield the float from direct impacts from external turbulence or air bubbles, placing it in a relatively stable liquid environment, minimizing the impact of process disturbances on the measurement.

The application discloses a static level measuring system calibration device and method, which comprises a rack, a fixed table and a water tank, wherein the rack is provided with a moving table, the moving table moves up and down through a linear displacement module on the rack, the moving table and the fixed table are respectively provided with a first static level and a second static level, the first static level is connected with the second static level through a flexible pipeline, and the second static level is connected with the water tank through a first pipeline; in the calibration process, the height value of the first static level is obtained through formula (4). Compared with the prior art, the position value of the first static level on the guide rail is automatically corrected through formula (4), the perpendicularity deviation existing in the installation environment is solved, and the calibration accuracy is ensured; the correction method is high in efficiency, and the height of the first static level does not need to be measured by using a laser interferometer after the first static level is moved each time.

This invention relates to the field of surface settlement monitoring technology, specifically to a method, device, and system for monitoring surface settlement around a foundation pit. The invention obtains a deviation allocation coefficient based on the similarity of the fluctuation between the liquid level reading within a preset window at the sampling time and the historical liquid level reading when there is no construction, as well as the construction status of the foundation pit. The monitoring period is divided into verification periods based on the measurement time. According to the deviation allocation coefficient, the degree of deviation between the liquid level reading and the elevation measurement value within the verification period is allocated to the sampling time within the verification period, obtaining the instantaneous correction increment at the sampling time. Based on the instantaneous correction increment in the previous verification period and the trend of the deviation between the liquid level reading and the elevation measurement value, the liquid level reading at the current time is adjusted to obtain the final settlement elevation. This invention dynamically allocates deviations based on construction status and temperature drift analysis, corrects the liquid level to obtain the final settlement elevation, and improves the reliability of settlement elevation under alternating dynamic and static conditions in foundation pits.

This application discloses a fiber optic grating static level, belonging to the technical field of static level instruments. It includes a main module and a protective module. The main module includes a base with placement slots on both sides of its top. Leveling components are respectively disposed inside the two placement slots. A connecting slot is formed on the top of the base, communicating with the two placement slots. A connecting pipe connects the two leveling components, located inside the connecting slot. The protective module includes a vertical rod fixedly connected to the top of the base. A top plate is fixedly connected to the top of the vertical rod. Through the cooperation of a worm gear, a worm wheel block, two gears, and four protective half-covers, rotating the worm gear causes the four protective half-covers to close in pairs, respectively covering the outer surfaces of the two leveling components for protection. This prevents any structure of the two leveling components from being exposed to the outside and prevents damage to the two leveling components.

The application provides a kind of steel structure building's collapse deformation detection device and monitoring method, it is related to physical sensor technical field, and outer pole is equipped in liquid storage tank, and first outer groove, second outer groove and third outer groove are formed on outer pole;When working fluid is heated, liquid level rises, and the highest point of second outer groove is higher than liquid level by outer pole moving up, and the amount of working fluid stored by second outer groove is reduced, and the amount of working fluid stored by third outer groove is increased, and the amount of reduction is less than the amount of increase, and the working fluid in liquid storage tank is reduced, so the liquid level drops;When working fluid is cooled, liquid level drops, and the lowest point of second outer groove is lower than the bottom wall of liquid storage tank by outer pole moving down, and the amount of working fluid stored by second outer groove is reduced, and the amount of working fluid stored by first outer groove is increased, and the amount of reduction is greater than the amount of increase, and the working fluid in liquid storage tank is increased, so the liquid level rises, to compensate for the rise and fall of liquid level, avoid unstable rise and fall fluctuation of liquid level, ensure detection accuracy and reliability of detection result.

The application is based on a vacuum preloading foundation settlement monitoring device and method based on the principle of communicating vessels: including a reference container unit arranged in a stable area outside the vacuum preloading site, each monitoring container unit arranged at each monitoring point in the vacuum preloading site, and a connecting pipeline system; the reference container unit includes a closed reference liquid storage tank for storing antifreeze liquid; each monitoring container unit includes a monitoring liquid storage tank with a pressure sensor arranged thereon; the connecting pipeline system includes a liquid passage pipe and an air passage pipe, the liquid passage pipe connects the reference liquid storage tank with the bottom of each monitoring liquid storage tank, and the air passage pipe connects the reference liquid storage tank with the top gas phase space of each monitoring liquid storage tank; a cloud processing center records the pressure sensor readings of each monitoring point before the vacuum preloading starts and after the system is stationary and stable, synchronously collects all pressure sensor readings at a set frequency after the vacuum preloading starts, and calculates and displays the cumulative settlement of the i-th monitoring point at time t based on the principle of communicating vessels.

This invention provides a layered settlement monitoring device and method for riprap foundations used in underwater blasting construction. It can be applied to the field of underwater foundation treatment monitoring in waterway engineering. The device includes: a reference system, a layered measuring point system, a pipeline protection system, and a data acquisition system. The reference system includes: a level tank and reference points; the layered measuring point system includes: several measuring devices arranged in layers along the depth direction of the foundation bed; the pipeline protection system includes: flexible protective pipes; the data acquisition system is communicatively connected to each differential pressure hydrostatic level for synchronously collecting differential pressure data before and after blasting construction.

The utility model discloses a kind of petroleum storage tank foundation settlement detection equipment, including petroleum storage tank, base, liquid storage cylinder structure, support structure and float ball scale structure, the petroleum storage tank is installed in the top of base, the outer surface of petroleum storage tank is equipped with fixed ring, the float ball scale structure is installed in the outer surface of petroleum storage tank by fixed ring, the support structure is installed in the side of petroleum storage tank, the liquid storage cylinder structure is installed in the recess of the top of support structure, the liquid storage cylinder structure is by sealing cover, water inlet, liquid storage cylinder is composed, the liquid storage cylinder structure and float ball scale structure are connected by communicating pipe between, the communicating pipe is transparent hose structure. Through the above structure, it can solve the problems, such as the detection equipment structure complex, insufficient precision, greatly influenced by environment and unable to real-time continuous monitoring in prior art, realize simple, efficient, accurate and real-time monitoring to petroleum storage tank foundation settlement.

The application relates to the technical field of health monitoring and management of civil structures, and discloses a kind of thermal power plant civil structure displacement monitoring management system and method, the method includes through multi-source heterogeneous sensor microsecond level synchronous acquisition, space-time unified data processing, structure type classification modeling, displacement component decoupling estimation, voxelized three-dimensional deformation field reconstruction, pattern matching identification and three-level dynamic early warning mechanism.The application can realize high-precision, real-time and intelligent structure displacement monitoring and risk prediction, and form a closed-loop emergency response through linkage with a DCS system.

The utility model embodiment provides a kind of static force level measurement system, comprising: minimum system unit, external communication unit, measurement unit, power unit, main shell and static force level assembly;The circuit board embedded in main shell is provided with minimum system unit, external communication unit, measurement unit, power unit;Minimum system unit is connected with external communication unit, measurement unit and power unit respectively;The main shell outside is provided with the navigation plug mounting plate, and static force level assembly is connected with measurement unit based on the navigation plug on the navigation plug mounting plate.Through the scheme, the problem of inconvenient installation of static force level measurement system in prior art can be solved.

The present application belongs to the technical field of civil engineering monitoring of urban rail transit, and particularly relates to a three-dimensional settlement-crack monitoring method and system for a static cutting transfer area of a subway exit. Three groups of monitoring point arrays are arranged, and data is collected by a total station and a static level dual-link. Geometric stability is checked based on redundant data of an external reference group, and a reference system is generated by combining double-link cross-chain consistency checking to generate a reliable marker. The construction event is used as a time anchor point, the main and auxiliary anchor points are matched, the linear time mapping model is combined to realize time alignment and generate corresponding reliable markers. The double-marker triggers a synchronous analysis window, and the spatiotemporal correlation characteristics of cracks and settlement indicators are combined to determine the cooperative deformation event, and the label with an evidence chain is output. The present application makes up for the defects of single-link data, solves the problem of time asynchronization of multiple collection ends, accurately identifies the deformation cause-effect relationship, forms a complete evidence chain, improves the monitoring reliability and rigor, and provides accurate support for the construction safety control and risk early warning of the transfer area.