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 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.

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 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.