摘要:
A method and apparatus are disclosed for scanning a surface of an object, transversely to a direction of motion. A scanner is provided for flying over the object at a flight altitude and flight velocity, having a system focal length, a scanning element rotating at a rotation speed which scans a surface over a scanning angle and a detector row, arranged at right angles to the scanning direction. A detector row is provided with a plurality of equal size individual detectors, which are capable of generating fundamental object pixels of a size which depends upon the distance from the object up to a maximum scanning distance. A standard object pixel, of a size corresponding to a fundamental object pixel, is driven at the maximum scanning distance. For each scanning sweep, via a sampling process, a uniform grid is formed which is composed of standard object pixels of a size corresponding to a fundamental object pixel at the maximum scanning distance in several lines and without gaps and/or overlaps. Uniform grids of consecutive sweeps have no gaps and overlaps between each other. A sampling process is performed for forming a uniform grid, independent of an actual flight altitude, and an actual flight velocity for each scanning sweep. The system focal length and the rotational speed of the scanner are controlled as functions of an actual flight altitude and flight velocity so that uniform grids, of consecutive scanning sweeps, have no gaps and/or overlaps between each other.
摘要:
A micromechanical actuator is suggested, the movable part of which, such as the diaphragm, the bending bar or a similar device, can be moved relative to a stationary part by a combination of electromagnetic and electrostatic forces. The manufacturing techniques and the applications of the actuator are described. The construction is very compact, that is, highly integrated.
摘要:
Integrated microsystem comprising electrical and nonelectrical, particularly optical functions in a laser system, wherein a base comprising anisotropically etchable semiconducting material on which etching structures for receiving optical and/or electro-optical and electrical/electronic and/or fluidic and/or mechanical elements or their mountings are arranged in predetermined distances and/or levels, as well as integrated switching circuits, and that at least a part of the optical, electro-optical or mechanical elements or their mounting is controllable and movable electrically in such a way that its position relative to the base is actively changeable, and that at least one sensor is provided which determines the effect of the position change on the function of at least a part of a microsystem and supplies a signal for repeated readjustment (self-adjusting) of optical elements and their mounting.
摘要:
A memory arrangement that includes a static memory cell with two MOSFETs that are connected such that an input signal for setting the memory cell is applied to one MOSFET, and the output of the other MOSFET is connected to the input of the first MOSFET, so that one MOSFET is always conductive while the other is blocked. The two MOSFETs are connected with positive feedback. In each case, the gate electrode is connected to a voltage equal to half the battery voltage. The source electrode of the first (N channel) MOSFET forms the input of the memory cell. The drain electrode of the first MOSFET is connected to the source electrode of the second (P channel) MOSFET. The blocking resistance of the drain-substrate diode of the first MOSFET is greater than the blocking resistance of the source-substrate diode of the second MOSFET. Also, the output voltage of the first (N channel) MOSFET is greater than the sum of the gate voltage and the threshold voltage of the second (P channel) MOSFET.
摘要:
The electro-optic measurement tapping device for a motion sensor movably arranged in a receptacle which can be rotated about a shaft, the deflection of the motion sensor from an initial position being detected and measured. The motiond detector has, on a side facing the rotating shaft of the receptacle, a scale provided with different optical characteristics in code form. In an axial bore of the rotating shaft, at least one fiber-optical light guide is arranged, one end of which is directed to the scale and the other end of which is directed to an electro-optic component, the electro-optic component being fixedly connected with a housing part bearing the rotating shaft of the receptacle.
摘要:
A process for joining variously shaped vacuum heat insulating elements having edges adapted to be butted against each other or to overlap each other. A bellows is tightly connected with each vacuum heat insulating element in the area of its edges, the free edge of the bellows projecting beyond the element. The heat insulating elements are positioned such that the edges of the bellows rest against one another in an aligned manner or overlap, and the bellows are tightly connected with one another. The heat insulating elements are then moved against one another until their edges rest against one another or overlap, and are tightly connected with one another. The gap at the joint formed between the heat insulating elements and the bellows is evacuated and closed off tightly.
摘要:
A device for detecting nitrogenous, phosphoric, chloric and/or oxygenous substances inside an object, particularly of explosives or addictive substances in pieces of luggage. A nuclear activating device stimulates the emission of positron radiation from nitrogen, phosphorous, chlorine and/or oxygen, and an activity measuring device records positron-electron annihilation radiation.
摘要:
An arthroscopic probe having an elongated shaft with a small probing hook, which can be used for diagnostic purposes and which, for therapeutic purposes, has a longitudinally displaceable optical fiber guided at the distal end of the probing hook so that it is curved by approximately 30.degree..
摘要:
A method for crystallizing substances, which are dissolved in a liquid at zero-gravity. In order to limit the extent of lattice defects occurring in the crystallized monocrystals as much as possible, it is provided, that the liquid during the crystallization is held as a quasi freely suspended liquid sphere and the substance in the liquid is crystallized using methods known per se. The liquid sphere is expediently held suspended within a space, which is limited from the outside by retaining elements. In a corresponding device, the retaining elements can be placed on the interior walls of a container.
摘要:
A method and arrangement for aligning a space vehicle with respect to a reference object is disclosed. A measuring direction is obtained by determining the angular orientation direction of the space vehicle with respect to the reference object and subsequently the space vehicle is aligned by means of actuators such that the measuring direction corresponds to a reference direction on the space vehicle. The actuators are driven by control signals which are derived from the measuring direction to cause control torques on the space vehicle. The orientation of the space vehicle and reference object is determined only with respect to a single measuring direction along a main axis of a direction sensor. The following steps are taken if the measuring direction does not correspond to the reference direction on the space vehicle:a) the space vehicle is rotated around the reference direction on the space vehicle,b) controlling a fault component of the direction of the reference object situated in the measuring direction by locking on a first control torque perpendicularly with respect to the reference direction on the space vehicle, andc) controlling the unmeasurable component of the direction of the reference object situated perpendicularly with respect to the measuring direction by locking on a second control torque perpendicularly with respect to the reference direction and perpendicularly with respect to the first steering moment.