56 results about "Tiltmeter" patented technology

Method and apparatus for monitoring growth of fracture during hydraulic fracturing treatment of a ground formation. A series of tiltmeters are positioned at spaced apart tiltmeter stations at which tilt changes due to hydraulic fracturing treatment are measurable by those tiltmeters. Tilt measurements obtained from the tiltmeters at progressive times during the fracture treatment are compared with estimated tilt changes estimated from an assumed hydraulic fracturing propagation. Useful values for initially undetermined values of parameters of the model are derived using an inverse procedure. The data analysis may be performed in real time as the hydraulic treatment progresses using differing propagation models to determine a most probable model.

A device and method for quickly and accurately leveling a surface in either the horizontal or vertical plane while not in proximity to the surface being leveled. The device comprises a rigid base designed to be places on any surface to be leveled, inclinometer circuitry used to determine the position of the rigid base relative to level or plumb, wireless circuitry used to transmit the results of the inclinometer to a remotely transportable unit containing a digital display used to read the results of the inclinometer reading.

The treatment well tiltmeter system comprises one or more tiltmeter assemblies which are located within an active treatment well. The treatment well tiltmeter system provides data from the downhole tiltmeters, and can be used to map hydraulic fracture growth or other subsurface processes from the collected downhole tilt data versus time. The system provides tilt data inversion of data from each of the treatment well tiltmeter assemblies, and provides isolation of data signals from noise associated with the treatment well environment. As well, the treatment well tiltmeter system provides geomechanical modeling for treatment well processes.

This inclinometer comprises an upper part (4), a lower part (6) forming a pendulum suspended from the upper part by an articulation (8), at least two portions of optic fibre (20, 22) placed on either side of said articulation, the ends of each portion being fastened to the two parts, each portion being previously put under tension between said parts, and at least one Bragg grating (24) in one of the portions. Any variation in the inclination of a structure to which is fastened the upper part induces a stress on the grating, which then modifies a light propagating in the portion where it is placed. The variation in inclination is determined from the modified light. The invention applies in particular to the surveillance of civil engineering structures.

The invention discloses an omni-directional tide observation system under the well, which relates to a tide observation system. In the invention, a system mainframe box (B) on the ground (A) is connected with an instrument body (E) which is arranged in a protecting pipe (D) of a drilling well through the transmission cable (C). The structure of the interior of instrument body (E) comprises a hoisting hole (1), a pressing spring (3), a supporting pole (4), a location device (5), a ball head joint (6), a circuit unit, a gravimeter (9), a clinometer (11), a primary leveling device (12) and a precise leveling device (13), which are connected in turn from top to bottom. The invention integrates the gravity instrument with the clinometers, which is put under the well; the gravity solid tide in the upright direction and the horizontal solid tide in two directions can be observed synchronously at the same time and place; the invention provides reliable, precise and continuous observation data; the invention can also be used in a general cave with the qualification of a triangle base.

The invention relates to an optical inclinometer, in which radiation (S) is emitted from a radiation source (2). After passing through a receptacle (6, 6') containing at least one first medium (11, 13), said radiation (S) is reproduced in a camera (9). Information concerning the inclination of the inclinometer can be gathered from the position of the first medium (11, 13), in particular a liquid level, in relation to the inclinometer or the camera (9). The recording of the position of the first medium (11, 13) by a camera (9) permits the evaluation of a plurality of characteristics, in particular the form, dimension and position of a boundary layer (14).

The invention discloses a system and a method for the monitoring and early warning of volcanoes based on an inclinometer and the GPS. The system includes a tilt measurement subsystem, a GPS monitoring subsystem and a ground control early warning subsystem. The tilt measurement subsystem is configured to obtain the ground tilt degree according to deformation of the tilt measurement subsystem caused by the deformation of a ground structure due to the magmatic pressure or mass redistribution so as to determine the small deformation of the volcano ground movement and to make early warnings; the GPS monitoring subsystem is used for obtaining the original observation data to determine ground displacement amount caused by the volcano to administer corresponding volcano movement state monitoring; and the ground control early warning subsystem is used for receiving tilt measurement data and the GPS data of the tilt measurement subsystem and GPS monitoring subsystem, for processing the data and for analyzing and obtaining the early warning data and for making an early warning signal according to the set early warning value so as to realize the detection of volcano state. The system and the method of the invention make the monitoring of volcanoes more accurate and ensure the reliability of data.

Methods and related systems are described for downhole positioning of sensors such as accelerometers, gyroscopes, tiltmeters and geophones. The sensor or sensors are mounted within the spherical rotor of a spherical motor such that the device can be actively positioned in one or more orientations by activating the spherical motor.

The invention relates to the field of sinking pipe calibration measurement, in particular to a high-precision inclinometer calibration method, comprising the steps of charging a segment, to be mounted, of a sinking pipe to a shallow dock area, mounting a hydrostatic level and a first inclinometer in the segment to be mounted, and using the hydrostatic level and the first inclinometer to acquire initial inclinations of the segment to be mounted; charging the segment to be mounted to a deep dock area, mounting a second inclinometer, and using the initial inclination of the segment measured by the hydrostatic level to calibrate the second inclinometer; after the second inclinometer is calibrated, comparing with the initial inclination acquired by the first inclinometer; after qualification is verified, mounting the segment on a bed. The invention is intended to provide the high-precision inclinometer calibration method having low external environmental impact, good measurement synchronism and small calibration error.

The invention discloses a method for obtaining the deflection of a dam body on the basis of measurement values of measured points of a limited inclinometer. Correlation vector regression with high generalization capability for small samples is adopted, measurement values of existing limited inclination angles are used as output variables, influencing factors such as coordinates of the measured points, the water level, the temperature, the pore pressure and the time are adopted as input variables, a correlation vector machine model is established, the tangent value of the inclination angle of an arbitrary spatial point on a measurement line at specific time is predicted, space coordinates are adopted for performing explicit optimal polynomial fitting on the tangent values of the inclinationangles on the measurement line, integration is performed on an optimal polynomial, and a tilt meter or the displacement measurement value of the top (such as an opening of an inclination measurementtube) of the measurement line of the inclinometer or the displacement measurement value of the bottom (such as the bottom of the inclination measurement tube) of the measurement line of the inclinometer is utilized to determine an integration constant, so that the horizontal displacement distribution (deflection) along the axis of an entire vertical inclination measurement hole is obtained. The measurement values of different time and space are simultaneously utilized, the influence factors such as external loads and the time and space are taken into account, and the method can be popularizedto other situations such as a slope, other projects of the slope and the horizontal layout of the measurement line.

A tiltmeter to measure a variation in inclination of a structure from a given starting position. The tiltmeter has two pots, each pot contains an identical volume and identical height of an identical liquid. A communication device connects the two pots and allows the liquid to flow between the two pots by the principle of communicating vessels. Two optical measuring devices are provided, one optical measuring device per pot. Each optical measuring device measures a variation in height of the level of liquid in the associated pot. The optical measuring devices are fiber optic devices coupled to a common light source.

The invention discloses a crustal inclination measurement device and method adopting a force balance feedback quartz horizontal pendulum. The crustal inclination measurement device comprises a bottom plate, wherein a tower-shaped quartz rack is fixed on the bottom plate. A quartz pendulum rod is suspended on the rack through two quartz suspension springs, and is at an approximately horizontal state. A pendulum bob is inserted and mounted at one end of the pendulum rod, and first and second parallel metal plates are respectively arranged on the two sides of the vertically arranged pendulum bob. The pendulum bob is parallel with the first and second parallel metal plates, so as to form a differential plate capacitor, wherein the pendulum bob serves as a moving plate, and the first and second parallel metal plates serve as static plates. The first and second parallel metal plates are connected with output terminals of a fixed direct current voltage generation unit and a sine waveform generation unit; the pendulum bob is connected with the input terminal of a crustal inclination measurement circuit; the output terminal of the crustal inclination measurement circuit is connected with the pendulum bob through a feedback unit. The crustal inclination measurement device can realize accurate measurement of crustal inclination angle when small inclination of the ground occurs, and a closed-loop feedback structure is constructed to solves problems in the existing quartz horizontal pendulum clinometers.

A spherical movable contact is housed in housing portions of a first case and a second case so as to be able to roll, and is to come into or go out of contact with a first fixed contact and a second fixed contact. The first case and the second case are fixed to each other so as to form an integral body in such a manner that the first fixed contact and the second fixed contact are opposed to each other. At least one of the first fixed contact and the second fixed contact is divided. The movable contact is disposed so as to roll while bridging the first fixed contact and the second fixed contact. Contact portions where the movable contact is to contact the first fixed contact and the second fixed contact assume arc shapes, respectively.

The invention discloses a micro-incline generation device for field proving of a clinometer, and relates to a geological instrument proving technique. The device consists of a base, support screw rods, cushion blocks, a direct-current motor, a driving gear, a driven gear, piezoelectric ceramic, a sensing unit and a touch sheet. The method comprises the following steps of: (1) coarsely tuning for the first time; (2) coarsely tuning for the second time; (3) finely tuning by utilizing the piezoelectric ceramic 70; (4) measuring micro displacement of the clinometer through a precision displacement measuring meter; and (5) calculating the angle variation of the clinometer by the micro displacement, and comparing the angle variation of the clinometer with the output voltage variation of the clinometer, thereby obtaining a scale value. The micro-incline generation device for field proving of the clinometer provided by the invention has a small volume, is convenient to carry, is convenient to operate, saves time, is compatible with proving, and is suitable for proving the clinometer.