423results about "Hydrostatic levelling" patented technology

The invention provides a building safety monitoring equipment based on a Beidou satellite and a sensor, and a monitoring method. A monitoring station comprises an antenna; the antenna is connected with a signal acquisition controller; a base station for providing positioning reference information to a monitoring station is arranged at a fixed position; the base station is connected with a position service platform; the position service platform comprises a calculation module, an issuing module and stored positioning information; the position service platform is connected with a building safety monitoring platform; the building safety monitoring platform is provided with a processing module for processing positioning information from the position service platform and further comprises an analysis judgment module for analyzing the positioning information processed by the processing module and judging whether a monitoring point has deformation and displacement or not; the analysis judgment module is connected with an alarming module. By adopting the monitoring equipment and the monitoring method, provided by the invention, a safety state of a building is monitored; the monitoring equipment and the monitoring method have the advantages of high precision, no attention of people, acquisition of real-time data in a whole day, all-directional monitoring, trend analysis and early warning.

The invention provides a method for monitoring foundation settlement by using a static water level gauge and static water level gauges used in the method. Each static water level gauge is provided with a liquid communication opening; one static water level gauge is set to be a standard point and one static water level gauge is arranged at each point of a plurality of points to be measured; the liquid communication opening of the liquid container of the static water level gauge at the standard point is connected in series with the liquid communication openings of liquid containers of the static water level gauges at the points to be measured through liquid communication pipes. The static water level gauges are characterized in that: a liquid container air vent is arranged at the top part of the liquid container of each static water level gauge and a pressure senor cabin air vent is arranged on a pressure senor cabin, so that the influences of temperature and pressure of atmosphere are eliminated; based on a water level balance principle, a time slot foundation settlement value of a point to be measured is a difference value between a liquid level height hi of the static water level gauge at the point to be measured and the liquid level height h0 of the static water level gauge at the standard point, namely delta hi=h0-hi. According to the invention, the problem that a static water level system is easily affected by temperature and atmosphere change is solved.

The invention provides a railway settlement monitoring system and an online monitoring method. The monitoring system comprises a data collection station, a benchmark hydrostatic level gage and a monitoring hydrostatic level gage, wherein the data collection station, the benchmark hydrostatic level gage and the monitoring hydrostatic level gage are respectively provided with a cable connector, and the cable connector on the benchmark hydrostatic level gage and the cable connector on the monitoring hydrostatic level gage are connected with the data collection station through a cable after being serially connected with each other; the benchmark hydrostatic level gage and the monitoring hydrostatic level gage are respectively provided with a ventilation pipe connector and a liquid pipe connector, the ventilation pipe connectors on the benchmark hydrostatic level gage and the monitoring hydrostatic level gage are serially connected with each other through a gas pipe, and the liquid pipe connectors on the benchmark hydrostatic level gage and the monitoring hydrostatic level gage are serially connected with each other through a liquid pipe. The automatic monitoring of the settlement situation of a railway foundation, bridges and culverts, tunnels and transitional sections can be realized on the basis of the inductance frequency regulation principle and the intelligent monitoring method, the manual intervention factor is effectively eliminated, the measuring precision is improved, and the labor intensity of workers can be alleviated.

The invention relates to a low coherence optical monitoring system and method for micron settlement of the long-span foundation of a high speed railway, and belongs to the technical field of photo-electro-mechanical integration measurement. A central liquid storage tank and a reference liquid storage tank are arranged on the foundation of a non-settlement area; a plurality of testing liquid storage tanks are arranged on the foundation of a settlement area; the upper half parts of the liquid storage tanks are filled with gas; the bottom ends of the liquid storage tanks are communicated with one another through a liquid connecting pipeline; the upper ends of the liquid storage tanks are communicated with one another through a gas connecting pipeline; the liquid connecting pipeline for communicating the liquid storage tanks is communicated with the gas connecting pipeline for communicating the liquid storage tanks through a vertical observation pipeline; low coherence optical sensors are mounted inside the testing liquid storage tanks. A signal transmission system converts the measured optical information into an electric signal to be input into a computer, and the settlement is displayed in real time. The low coherence optical monitoring system is stable in performance and is not influenced by severe environments such as a tunnel, and the low coherence optical monitoring method is a novel optical fiber settlement monitoring method suitable for existing structures and new structures.

The invention discloses a satellite positioning and static leveling-based layered settlement monitoring system and method. The system comprises a base station, a monitoring station which is arranged in a settlement monitoring area and a monitoring center which communicates with the monitoring station, wherein the base station communicates with the monitoring station; the monitoring station comprises an observation pillar, a second Beidou satellite signal receiver mounted on the observation pillar, a data transmission unit, a plurality of layered settlement marks and a static level system; the static level system comprises a plurality of static level gauges; each layered settlement mark is provided with one static level gauge; one of the static level gauges is arranged on the observation pillar. The method comprises the following steps: I, setting of the monitoring system; II, data acquisition and transmission; III, data processing and analysis. According to the satellite positioning and static leveling-based layered settlement monitoring system and method, the calibration and correction problems of the instable working base points during the static leveling can be effectively solved, and the long-term, remote and real-time monitoring for the layered settlement deformation of the geologic bodies can be realized.

The invention relates to a method for monitoring the deep settlement of a foundation, which is characterized in that: a liquid level static pressure monitoring method is adopted; in the liquid level static pressure monitoring method, a container provided with a pressure sensor and a secondary instrument is adopted, taken as a pressure measuring reference container and fixed on the ground which isnot influenced by the foundation settlement; the height of a pressure sensing surface of the pressure sensor is greater than that of any one embedded settlement instrument; the embedded settlement instrument consists of a shell, a three-way joint, a pressure sensor, a secondary instrument circuit and a serial bus circuit and is electrically connected with other embedded settlement instruments anda ground measurement and control system through an electric serial bus; and the measurement and control system records a pressure value of each detection point, converts the pressure value into a foundation settlement value, and performs curve fitting to obtain a foundation section settlement outline.

The invention discloses a horizontal multipoint settlement monitoring device and a monitoring method thereof based on hydraulic measurement, which are used for settlement monitoring of buildings such as roadbeds or bridges. The monitoring device comprises a liquid storage tank arranged at a datum point part, monitoring containers, silicon micro differential pressure sensors, settlement collecting instruments and a settlement plate used for anchoring the silicon micro differential pressure sensors, wherein the monitoring containers, the silicon micro differential pressure sensors and the settlement collecting instruments are arranged at the datum point part and monitoring point parts; the liquid storage tank and the monitoring containers are communicated through communication pipes; membranes of the silicon micro differential pressure sensors are in contact with the liquid levels in the monitoring containers; the output ends of the silicon micro differential pressure sensors are connected with the input ends of the settlement collecting instruments; and all the silicon micro differential pressure sensors are communicated with the same air pipe. The monitoring method is achieved via the monitoring device; and according to the monitoring method, the pressure of the monitoring points and the datum point is detected through the silicon micro differential pressure sensors to obtain elevation changes of the monitoring points relative to the datum points, and then settlement changes are obtained through calculation. The monitoring device has the advantages of high measurement precision, good stability and simpleness and convenience in field mounting; and automatic monitoring is easily realized.

The invention provides a tunnel deformation real-time monitoring device and method. The tunnel deformation real-time monitoring device comprises a plurality of spirit levels and a laser distance measuring instrument, wherein the spirit levels are arranged at the top part of a tunnel and are used for measuring the vault crown settlement of the tunnel; the laser distance measuring instrument is arranged at the side wall of the tunnel, and is used for monitoring the surrounding convergence of the tunnel; the spirit levels and the laser distance measuring instrument are electrically connected witha data collection device, and the data collection device is electrically connected with a data base station. In the use process, the method comprises the following steps of selecting the deformationmeasuring points of the tunnel, and arranging the spirit levels, the laser distance measuring instrument, the data collection device and the data base station, so as to monitor the vault crown settlement and the surrounding convergence of the tunnel. The tunnel deformation real-time monitoring device and method have the advantages that the vault crown settlement and the surrounding convergence ofthe tunnel are respectively measured by the spirit levels and the laser distance measuring instrument, so as to more reliably monitor the deformation of the tunnel in real time; by arranging the monitoring type of data collection device and data base station, the unmanned duty type monitoring can be realized.

The invention belongs to the field of building settlement detection and relates to a multi-point remote monitoring system for settlement. The system comprises monitoring base point equipment, detecting point equipment, a communication pipe, a programmable logic controller, a power supply, general packet wireless service equipment and a data logging alarming device, wherein the power supply supplies power to the monitoring base point equipment, the detecting point equipment, the programmable logic controller, the general packet wireless service equipment and the data logging alarming device through cables; the monitoring base point equipment and the detecting point equipment are connected with each other through the communication pipe; monitoring data of the monitoring base point equipment and the detecting point equipment is transmitted to the programmable logic controller; the settlement amount of a monitoring point is analyzed and figured out; and the data is remotely transmitted through the general packet wireless service equipment. According to the invention, convenience for increasing and reducing the number of the monitoring points can be provided, the effectiveness and the intelligence of monitoring means are improved, secondary hazards caused by valve chamber settlements with different degrees can be found in time through real-time monitoring, safety accidents are prevented, and simple structural composition and simplicity in construction are achieved.

A Brillouin distributed optical fiber sensing based structural deflection and subsidence monitoring system comprises a deflection/subsidence physical quantity conversion portion based on the principle of communicating vessels, a physical parameter sensing portion based on the Brillouin distributed optical fiber sensing technology and a deflection/subsidence evaluation system, and is specifically characterized in that the liquid level in an oil tank is kept at a certain height, oil is delivered to sensing vessels fixed on a measured structure through an oil pressure header pipe and branch pipes, an optical fiber is wound through pulleys and fixed on a piston and a bottom plate in each vessel, and when the deflection/subsidence of a measured point is increased, the strain of each corresponding optical fiber is increased, an internal free optical fiber section is just influenced by the temperature and can implement temperature compensation for the other optical fibers, the Brillouin distributed optical fiber sensing technology is used for strain and temperature sensing, and the evaluation system evaluates deflection/subsidence finally. The Brillouin distributed optical fiber sensing based structural deflection and subsidence monitoring system is flexible to arrange and capable of achieving a great quantity of series connection and suitable for long-term health monitoring of large infrastructures.

The invention provides a method for improving monitoring accuracy of structural settlement and belongs to the fields of structural health monitoring and sensor application. The method for improving the monitoring accuracy of the structural settlement is characterized in that a fixed liquid level retainer which does not subside along with the structural settlement is adopted to serve as a reference liquid level, simultaneously a hydraulic balancing pipe is added at one end of a liquid pressure sensor to offset initial pressure-intensity deviation of the liquid pressure sensor, the measuring range of the e liquid pressure sensor is decreased, the measuring sensitivity of the liquid pressure sensor is improved, and the monitoring accuracy of the structural settlement is improved. In addition, calibration procedures in the measurement process are simplified, and the method only needs primary static initialized calibration and overcomes the defects including low accuracy and complicated calibration procedures in traditional structural settlement monitoring.

Provided is an altitude information acquiring device including a measuring unit which measures atmospheric pressure; a wireless communication unit which performs near field communication with an external device; an altitude information acquiring unit which acquires altitude information from an external positioning device through the wireless communication unit; an inversion detecting unit which detects an inversion of a changing direction of the atmospheric pressure periodically measured by the measuring unit; a communication control unit which controls a timing to acquire the altitude information through the wireless communication unit at a set timing, based on the inversion detected by the inversion detecting unit; and an integrated altitude change acquiring unit which acquires a rise altitude integrated value obtained by integrating an amount of altitude change upon a rise and a fall altitude integrated value obtained by integrating an amount of altitude change upon a fall, based on the acquired altitude information.

The invention discloses a long-term deflection monitoring system and method for a long-span bridge. The monitoring system comprises a plurality of static level gages which are installed on a monitored bridge body through multiple installation frames, the monitored bridge body is a box girder, and the installation frames are installed at the bottom of a box girder top board; each installation frame comprises a triangular supporting frame and a supporting board which is installed on the triangular supporting frame and is adjustable in installation height, the triangular supporting frames are transversely arranged in the bridge direction, and the static level gages are installed on the corresponding supporting boards. The monitoring system is easy and convenient to install and arrange, influence from external environment is small, the monitoring precision is high, and the use effect is good. The monitoring method comprises the first step of determining measured points and selecting a datum point, the second step of installing the installation frames, the third step of installing the static level gages, and the fourth step of monitoring the deflection for a long term. The process of monitoring the deflection for a long term comprises the steps of obtaining the initial liquid level height, determining the monitoring time points of the deflection and monitoring the deflection. The monitoring method is simple in step, convenient to implement, good in use effect and capable of effectively monitoring the deflection of the bridge for a long term.

The invention relates to an on-line monitoring method used for long distance linear infrastructure settlement tests, which is characterized in that several measuring points are distributed on a long distance linear infrastructure to be measured along linear direction according to requirement, a settlement test sensor is arranged at each measuring point, each settlement test sensor can be connected through a communicating pipe, the settlement sensor comprises a pressure membrane and a fiber grating sensor, a communication liquid in the communicating pipe is in a sealing state, according to a principle of the communicating pipe, liquid pressure intensity at each measuring point of the stationary communicating pipe is same, water pressure at different position can be deformed through the pressure membrane by the test system, corresponding displacement change can be measured by the fiber grating sensor, and finally settlement test at each measuring point can be realized. According to the method, settlement test at each measuring point can be realized by a pressure intensity transmission principle, and problems of limit measuring range and difficult balance of water surface due to pressure balance realized by flowing of the free water body in a static force level can be overcome.

The invention provides a static leveling device and a system. The static leveling device comprises a leveling box, a floating barrel and a vibratory string force transducer. The static leveling system comprises a reference level box disposed at the reference level point, one or more working level boxes disposed at the working level point, a water inlet tank, a water outlet tank, a water separator and a total air-flow pipe. By the above device and system, synchronous automatic measuring of all working level points can be realized, thus effectively eliminating artificial intervention factors in the static leveling result, greatly raising measuring precision and substantially minimizing artificial labor intensity.

The invention provides a GPS positioning-based settlement monitoring device and monitoring method. The device is characterized in that multiple static force level gauges arranged on concrete bases areincluded, and one of the static force level gauges serves as a datum point static force level gauge; a static GPS measurement terminal is arranged beside the datum point static force level gauge; allthe static force level gauges are mutually communicated through a liquid introduction communication pipe and a gas introduction communication pipe; and sensors in all the static force level gauges and the static GPS measurement terminal are all connected with an upper computer. By adopting the device to conduct height measurement on monitoring points, the advantages of being high in measurement precision and operation efficiency, capable of achieving automated real-time monitoring and the like are achieved compared with traditional leveling and trigonometric height measurement methods; compared with a single GPS measurement method, the device has the advantages that the multi-point height measurement and monitoring functions are achieved only by adopting one terminal, and therefore the equipment input cost is greatly reduced.

The invention discloses a two-way bracing wire device, which belongs to a measuring device in water conservation, communication and rock and soil field. It includes a fixing end, suspending end, bracing wire body, two-way measuring box, automatic water filling device, liquid storage barrel and connecting pipe, the two-way measuring box has a water box, floating bracket, manual measuring meter and two-way bracing wire device; the water box, liquid storage barrel and the automatic liquid filling device are connected together through the connecting pipe, the bracing wire is leaded in through the fixed end to the suspending end through each measuring bracket, and the wire are winded on the heavy wheel. The invention changes the single measuring aim of the single way bracing wire device and static force level device, realizes two functions with one wire.

The invention relates to a measuring device, in particular to an accurate measuring device for the vertical deformation of a space structure. The space structure vertical deformation measuring device of the present invention comprises a reference static level, a measurement static level, and a data processing module, and the reference static level and the measurement static level are respectively connected to the data processing module; the reference static level is arranged in the space structure On the fixed datum point of , the measurement static level is arranged on the top of the space structure, and the reference static level and the measurement static level are connected through pipelines. The device measures the vertical deformation of the space structure, has high measurement accuracy, long-term stable and reliable performance, a large measurement range and high sensitivity.

The invention discloses a tolerance settlement monitoring device. The device is connected to an external gas-guide pipe and a liquid-guide pipe. The tolerance settlement monitoring device comprises atank body, a separation plate, a breather pipe, and a pressure sensor. The invention discloses a tolerance settlement monitoring system. The system comprises the at least two tolerance settlement monitoring devices, a liquid storage tank, the gas-guide pipe, the liquid-guide pipe and an upper computer. The invention also discloses a tolerance settlement monitoring method. The method comprises thefollowing steps of monitoring a pressure signal and selecting a reference point; acquiring a first pressure signal change value and acquiring a second pressure signal change value; and acquiring a sedimentation value. An adaptation capability to an environment is increased, detection precision is improved, a pipeline blockage problem is overcome, construction efficiency is increased, a failure rate and maintenance cost are reduced, and the volatilization of a liquid medium is avoided.

The invention discloses a device and a method for measuring the vertical displacement of buildings, wherein using the principal of connected pipes to realize multipoint communication, the device converts small elevation variation at an equipment installation location into vertical position variation of a liquid level interface by measuring the position of the liquid level interface in a communicating container, and the vertical position variation of the liquid level interface is directly detected by a CCD sensor or a PSD photoelectric device. The functions of the CCD sensor or the PSD photoelectric device such as program control driving, signal processing and identification, data acquisition, communication with computers, etc. are implemented by using a single chip machine. The device integrates sensor and peripheral circuit and is manufactured by specially-designed moulds, thereby achieving good integrity and sealing performance and convenient installation. The device can be used for observing the vertical deformation of dam, bridge, dock, high slope, ground fissure, fault, weak intercalated layer, etc.