31results about "Artificial horizons" patented technology

A process to control the trajectory of a spinning projectile. The projectile's accelerations are measured by means of an inertial unit in three axes within a reference linked to the projectile so as to prepare the piloting commands for the projectile's trajectory. The velocity vector V components (VX, VY, VZ) of the projectile are measured using a global positioning system (GPS) along three axes and within a land reference (GX, GY, GZ). Based on these measurements, the components (ΓX,ΓY,ΓZ) of the acceleration vector Γ are evaluated in the same land reference (GX, GY, GZ). At each of these measurements and periodical evaluations by the GPS, the Euler angles of the projectile are recalculated by combining the resultants of the velocity (V) and acceleration (Γ) measurements given by the GPS and those of the acceleration given by the inertial unit.

The present invention includes an artificial horizon device including a sensor unit with a movable platform, at least one actuator linked to the platform, and one or more sensors located on the platform for sensing the position orientation of the platform relative to an external mass or the motion of the platform. The horizon device also includes a processing unit signally connected to the sensors and the at least one actuator. The processing unit is adapted to receive signals from the sensors and send signals to the actuators to move the platform to a horizontal orientation. The horizon device also includes either a display unit comprising an indicator of a horizon line which substantially corresponds to the horizontal orientation of the platform or a secondary device.

The invention provides a levelling and horizontal error testing device which comprises a base, a granite surface plate, a levelling and aiming device, a transmission system and an electric control box. The levelling and aiming device comprises a photoelectric auto-collimator, a pentaprism, a silicone oil tray, a single-axial laser alignment device and a support, wherein the photoelectric auto-collimator is used for optical aiming of platform leveling errors, the pentaprism is used for bending and turning the measuring optical axis of the photoelectric auto-collimator at 90 degrees and then aims to a platform standard hexahedron, the silicone oil tray is used for zero correction of the photoelectric auto-collimator, the single-axial laser alignment device is used for accurate alignment of the optical axis of the auto-collimator, and the support is used for installing the photoelectric auto-collimator, the pentaprism, the silicone oil tray and the single-axial laser alignment device. The levelling and horizontal error testing device can achieve automatic alignment of the optical axis, meanwhile achieves automatic measurement of leveling errors and is high in testing efficiency and good in test data consistency.

The invention provides a device comprising a level line detector selectively oriented in reference to a surface; a moveable arm; and a processor in communication with the detector and arm to selectively move the arm, to maintain the arm in surface reference. In another embodiment, a system comprising a level line detector selectively oriented in reference to a surface; a moveable arm; a processor in communication with the detector and arm to selectively move the arm, to maintain the arm in surface reference; and a level line to communicate with the detector. In another embodiment, the invention also provides a method comprising: selectively orienting a level line detector in reference to a surface; detecting a level line; communicating detection data to a moveable arm; and moving the arm based on the data, to maintain surface reference.

Provided is a method for leveling seedbed land by utilizing a track device. Calibration of track U-shaped bracket positions is firstly achieved by using a twin-laser transmitting calibration device, then a plurality of track U-shaped brackets are fixed according to the positions calibrated by the twin-laser transmitting calibration device, gear hole type tracks used by a gear type land leveler are installed on the track U-shaped brackets, track base leveling and scribing devices are erected on the track U-shaped brackets laid on the track U-shaped brackets and use scribing stop blocks of track base leveling shovels to scribe the final installing positions of the gear hole type tracks while leveling track bases, the double tracks already installed on each track U-shaped bracket are wholly moved to the final installing positions of the corresponding gear hole type tracks, and the gear type land leveler is erected on the laid gear hole type tracks and can achieve efficient and high-quality seedbed leveling operation. The seedbed land leveled by using the method is flat, consistent in overall level and suitable for direct seedling raising and sowing operations and can meet the demand for efficient and high-quality seedbed land of modern agriculture.

The invention discloses a rapid leveling method for a surveying instrument tripod. The method is characterized in that the method is characterized by comprising the following steps: firstly, through holes are drilled in lower portions of sleeves of three supporting legs of the tripod, air bags extending in the axial direction and air inlets are formed in inner cavities of the supporting leg sleeves, during field surveying and mapping work, the three air bags are communicated through connecting parts, then a certain amount of air is inflated into the air bags through inflating equipment for inflating valves, and a support platform is in a suspension state; and then a palm is used for pressing the support platform at different acting points, a level bubble is observed at the same time, whenthe level bubble is observed to reach the horizontal state, fastening screws are screwed down to fix three scale sliding rods, all gate valves are closed at the same time, and the tripod is kept in the horizontal stable state.

The invention relates to the field of horizontal line and grade line marking technology and discloses an intelligent adjustable laser horizontal line and grade line marking instrument and method. The intelligent adjustable laser horizontal line and grade line marking instrument is used for line marking of a reference object. The instrument comprises an underframe support, a middle frame support and a working disc, wherein center shafts at two sides of the working disc are arranged on the middle frame support through upper and lower rotary mechanisms, the middle frame support is mounted on the underframe support through left and right rotary mechanisms, working faces of a hexagonal disc body of the working disc are respectively provided with a horizontal line laser window emitting laser horizontal graticule and a vertical line laser window emitting laser vertical graticule, and a leveling display tube used for adjusting a horizontal line is arranged on a front surface of the working disc. According to the invention, horizontal lines of a surrounding circle and grade oblique lines of walls and stairs at side surfaces of a road can be marked at the same time, so the problems of datum of gradients of the walls and stairs at the side surfaces of the road and simultaneous operation can be overcome, thereby improving precision operation of the gradients of the walls and stairs at the side surfaces. The intelligent adjustable laser horizontal line and grade line marking instrument has the advantages of a simple structure, convenient operation and low manufacturing cost.

The invention relates to a structural surface occurrence measuring method and a gravity center type structural surface occurrence measuring instrument, and in particular relates to a structural surface occurrence measuring method and a gravity center type structural surface occurrence measuring instrument which are applied to the field of civil engineering. The invention provides a gravity center type structural surface occurrence measuring instrument which is convenient to use, free of instrument level adjustment and capable of rapidly and accurately measuring structural surface occurrence. The gravity center type structural surface occurrence measuring instrument comprises a frame, a central partitioning plate and a spherical compass. The invention further provides a structural surface occurrence measuring method which comprises the following steps: A, placing the instrument on a structural surface horizontally; B, after the position of the central partitioning plate is stabilized, measuring a true dip direction angle; and C, measuring a true dip angle of the structural surface. By adopting the instrument and the method provided by the invention, the situation that a spirit level bubble is centralized while a compass edge is tightly close to the structural surface is not needed, or the dip angle does not need to be measured by adjusting a tubular spirit level or suspending hammer. The technical scheme of the invention is slightly affected by measurement environments and artificial factors, so that the measurement can be relatively accurately and rapidly implemented.

A microelectromechanical gyroscope having a supporting structure; a mass capacitively coupled to the supporting structure and movable with a first degree of freedom and a second degree of freedom, in response to rotations of the supporting structure about an axis; driving components, for keeping the mass in oscillation according to the first degree of freedom; a read interface for detecting transduction signals indicating the capacitive coupling between the mass and the supporting structure; and capacitive compensation modules for modifying the capacitive coupling between the mass and the supporting structure. Calibration components detect systematic errors from the transduction signals and modify the capacitive compensation modules as a function of the transduction signals so as to attenuate the systematic errors.

An aeroplane attitude indicator device includes a mobile rod which includes a first end connected by a link to a support fastened to the aeroplane and a second end to which is connected a moving body, at least one actuator for controlling the motions of the rod, and a system for piloting the at least one actuator as a function of information originating from an attitude detection system of the aeroplane, so as to orient the rod in a vertical direction. The assembly of rod and moving body correspond to a pendulum-like artefact. Also described is an aeroplane cockpit equipped with an attitude indicator device.

The invention discloses a visualization laser receiver. The visualization laser receiver comprises more than one group of sensitization arrays for detecting laser, a controller and a visualization interface, wherein the controller is used for driving the sensitization arrays and can receive a feedback signal, and the visualization interface is controlled by the controller so as to simulate the detected laser in a visual pattern; and the controller and the visualization interface and the sensitization arrays can form electric connection. The visualization laser receiver provided by the invention has the advantages that the position of a lasing surface can be visually reacted, the localization is rapid, the precision is good, and the visualization laser receiver is not limited by a field.

The invention provides a design method for horizontal reference and an apparatus thereof and enables designing and selecting of a horizontal reference platform to be realized and an unrealizable technical problem in background technology to be solved. According to the invention, the physical properties of mercury that mercury is in a liquid state at normal temperature and has a high density and a great buoyancy force are utilized, which enables the surface of a planar mirror floating on mercury to be parallel to a horizontal plane, thereby achieving the purpose of selecting a horizontal reference plane. The invention has the obvious advantages of high precision, high reliability, small volume, simple construction, convenient fabrication, installation and debugging, etc.

The invention relates to a leveling device (100) with a housing (110). The housing has an upper part (120). A signal unit (150) for generating an optical signal (152) is arranged on the upper part. The upper part (120) can rotate relative to a lower part (130) that is connected to at least one support leg (132, 134, 136). The signal unit (150) can irradiate the optical signal (152) in a self leveling mode. A floating ring (180) for sealing and reducing the radial gap is arranged between the lower part (130) and the upper part (120).

The invention discloses a disturbing gravity-based quasi-geoid land-sea seamless splicing method. In the method, the physical characteristic that the disturbing gravity is not limited by local height datum is fully utilized, a unified earth reference ellipsoid is taken as a coordinate reference frame, the land-sea unified disturbing gravity is calculated by adopting land-sea reference unified global navigation satellite system (GNSS) and gravity data, and the land-sea unified disturbing gravity is introduced to the more strict arithmetic provided by the invention so as to realize quasi-geoid land-sea seamless splicing. Different from the conventional fit algorithm for calculating land-sea height anomaly by utilizing gravity anomaly and a Stokes formula, the method is strict theoretically,and can eliminate result errors caused by the oddness of a kernel function.

An aeroplane attitude indicator device includes a mobile rod which includes a first end connected by a link to a support fastened to the aeroplane and a second end to which is connected a moving body, at least one actuator for controlling the motions of the rod, and a system for piloting the at least one actuator as a function of information originating from an attitude detection system of the aeroplane, so as to orient the rod in a vertical direction. The assembly of rod and moving body correspond to a pendulum-like artifact. Also described is an aeroplane cockpit equipped with an attitude indicator device.

The invention provides a river measuring method based on three-dimensional reconstruction, which comprises the following steps of firstly, establishing a coordinate system on a level gauge horizontalplate, and marking a plurality of coordinate points; then placing the level gauge at any position of the terrain to be measured, shooting a plurality of photos of the terrain to be measured from a plurality of angles and a plurality of distances, wherein at least ten photos comprise the level gauge; secondly, importing the shot pictures into visalSFM software, finding out all the pictures containing the gradienter in the software, and inputting marked coordinate points in each picture containing the gradienter; using the visual SFM software to restore the shooting position of the camera through calculation, and construct a to-be-detected terrain three-dimensional model according to the picture; and finally, dividing the to-be-measured area into grids, and interpolating points of the to-be-measured terrain three-dimensional model to the divided grid points to obtain a final river work model. According to the invention, through the mutual verification of a large number of points, a high-precision measurement result is provided.

The invention belongs to a mine survey staking-out technique, and particularly relates to a longitudinal calibration method in mounting a shaft device. The method comprises the steps: arranging a measurement vertical line, determining a horizontal mounting surface, and staking out a device position on the horizontal mounting surface. The longitudinal calibration method is simple, has strong operability, short mounting time and high mounting accuracy, and reduces the labor intensity.

The invention relates to the field of horizontal line and grade line marking technology and discloses an intelligent adjustable laser horizontal line and grade line marking instrument and method. The intelligent adjustable laser horizontal line and grade line marking instrument is used for line marking of a reference object. The instrument comprises an underframe support, a middle frame support and a working disc, wherein center shafts at two sides of the working disc are arranged on the middle frame support through upper and lower rotary mechanisms, the middle frame support is mounted on the underframe support through left and right rotary mechanisms, working faces of a hexagonal disc body of the working disc are respectively provided with a horizontal line laser window emitting laser horizontal graticule and a vertical line laser window emitting laser vertical graticule, and a leveling display tube used for adjusting a horizontal line is arranged on a front surface of the working disc. According to the invention, horizontal lines of a surrounding circle and grade oblique lines of walls and stairs at side surfaces of a road can be marked at the same time, so the problems of datum of gradients of the walls and stairs at the side surfaces of the road and simultaneous operation can be overcome, thereby improving precision operation of the gradients of the walls and stairs at the side surfaces. The intelligent adjustable laser horizontal line and grade line marking instrument has the advantages of a simple structure, convenient operation and low manufacturing cost.

The invention relates to a leveling device (100) with a housing (110) having an upper part (120) on which a signal unit (150) for generating an optical signal (152) is arranged, wherein , the upper part (120) is rotatably configured relative to the lower part (130) connected to at least one support foot (132, 134, 136), and wherein the signal unit (150) is configured for self-levelling radiation of an optical signal (152 ), a floating ring (180) for sealing and radial clearance reduction is arranged between the lower part (130) and the upper part (120).

There is provided a surveying instrument including a tripod which is installed on an installation surface and a surveying instrument main body which is provided on the tripod and laterally rotatable around a longitudinal axis, wherein the tripod includes a reference leg has a known relationship between a lower end of the reference leg and a machine reference point which is a machine center of the surveying instrument main body, and two auxiliary legs, the reference leg is installed in such a manner that a lower end of the reference leg coincides with a reference point, wherein the surveying instrument main body calculates a position of the machine reference point with respect to the reference point based on the positional relationship between the lower end of the reference leg and the machine reference point.

The invention relates to a bridge type tool for measuring a high-precision camera mounting surface, which consists of a parallel ruler (1), an angle piece (2), a U-bar (3), a support and levelness regulating device (4), a long support beam (5), a short support beam (6), a cushion block (7), a support rod (8) and a fastening piece; and under the premise of satisfying the high precision requirement on measuring the mounting surface, a measuring datum is transferred from the ground to the parallel ruler at the upper part of a top plate, so the problem that measure within a big envelope scope cannot be realized by using the traditional method is solved.