Abstract: The present invention relates to a procedure for measuring the wheel angle on steerable vehicles. When determining large course angles, such as maximum wheel deflection, the course angle itself, which is difficult to measure, is not measured directly. Instead, the wheel camber (or turning) is measured and this angle is then utilized to calculate the course angle sought, with the aid of known values of straight course angles of the wheel and gradient of the kingpin.

Abstract: The present invention relates to a measurement system for measuring wheel angles and determining the position of chassis units on a vehicle. The measurement system includes a measuring unit which can be mounted on a vehicle and arranged to measure angles and distances in the horizontal plane with reference to the longitudinal axis of the vehicle, and in the vertical plane with reference to the vertical direction. The results of measurement are fed to a control unit, connected to the measuring unit by a lead. A computer which compiles and computes the measurement results, and provides information on the vehicle wheel alignment angles and the positions of vehicle chassis units by means of a display monitor or a printer connected to the control unit.

Abstract: In order to improve the measuring accuracy in optical distance meters determining transit-time, the meters having optical senders emitting short pulses (11), optical receivers in which the reflected pulse received from the object to which the distance is being measured is converted to a corresponding electrical pulse (12), the signal received is repeatedly digitalized (13a, 13b, etc.) and these digital values are stored in a memory. Each of these stored values, is then fed from the memory one by one a predetermined number of times (14a, 14b, etc.) to a digital low-pass filter with deriving characteristic within its pass band. The number of computations of this filter before the output magnitude (15a, 15b, etc.) of the filter passes zero (16) constitutes a measurement (17) of the distance to the object being measured.

Abstract: An apparatus for determining the roll position of a spinning projectile with the aid of polarized electro-magnetic radiation comprises a transmitter for emitting polarized radiation in a direction towards the projectile and a polarization-sensitive receiver disposed in the projectile for receiving the polarized radiation. The polarized radiation emitted from the transmitter has an asymmetric wave-form which is formed by superimposing at least two mutually phase-interlocked radiation components of the wavelength relationship of 2:1 and/or multiples thereof, and the polarization-sensitive receiver includes a single receiver antenna.

Abstract: Transmitter and receiver devices are included in an active optic proximity fuse for providing increased resistance to aerosols. The transmitter and receiver units operate with optical radiation and include a signal processing unit which reacts to a target located in a sensing region and reflecting optical radiation emitted from the transmitter device to the receiver device. The sensing region displays, most proximal a carrier of the proximity fuse, an inner sensing limit which is located at an inner distance from the carrier. The signal processing unit operates with preparatory signal processing and/or time measurement of reflected signals when the target is located within the sensing region, and emits an activation signal only when the target passes the inner sensing limit.

Abstract: A proximity fuse for a launchable unit, for example a missile, includes transmitters for emitting optic radiation in a plurality of narrow part lobes, and receivers for receiving optic radiation emitted through the part lobes and reflected from a target towards which the unit is homing in. The receivers are enabled to discern reflecting radiation derived from each respective part lobe from the radiation emitted and reflected from other part lobes. The radiation derived from each respective part lobe is processed individually in the receiver.

Abstract: An apparatus for measuring the coordinates of a target object with respect to a reference point within a particular field of view. A mask having a radiation transparent portion bounded by a straight line and a substantially logarithmic curve meeting at the reference point rotates about the reference point at a reference frequency to modulate a beam of radiant energy from the target object. The modulated beam is applied to a detector that generates corresponding electrical pulses having a duration that corresponds to the radial distance of the target object from the reference point. The phase shift of the pulses with respect to the reference frequency determines the angular position of the target.

Abstract: A missile is provided with a proximity fuze arranged to transmit a signal and to receive echoes for activating an explosive charge when an object is within range. A signal processing device located between the receiver of the fuze and the charge is responsive to signals from the receiver and to a blocking signal of predetermined duration, and operates to transmit a control signal for initiating explosion of the charge only if the blocking signal has terminated and a predetermined time interval has elapsed, preceding occurrence of a receiver output signal, during which interval no output signal was produced by the receiver.

Abstract: Apparatus for controlling the output power of a laser diode the beam of which is directed in a selected direction toward a target so as to enable a missile or the like to be directed along the beam toward the target. The apparatus includes a circuit which supplies a variable amount of power to the diode, and a circuit which is responsive to the radiation emitted by the diode, and the latter circuit generates a signal which is proportional to the magnitude of the emitted radiation. A control circuit is provided which is initiated into operation at the time of firing of the missile and generates a signal which represents the desired increase in magnitude of the radiation emitted by the diode during the time of travel of the missile toward the target.

Abstract: A device is provided for controlling the sensitivity of a receiver of the type comprising a photosensitive element operative to convert radiant energy into electric signals and having an amplifier connected to the output of the photosensitive element and signal processing members for separating a useful signal from interfering background radiation. A sensor device is connected to the photosensitive element to sense the direct current which the element emits in response to radiation from the sun or other strong sources of disturbance, the sensor device being operative to emit a signal when the direct current exceeds a predetermined value, and a switching device responsive to said signal operates to switch the amplifier from a given fixed sensitivity level to a lower fixed level of sensitivity.

Abstract: A radiation emitter for a projectile comprises a pyrotechnical charge located within the body of the projectile, and connected via a channel within the body to an opening in the side of said projectile to emit radiation via said opening when the pyrotechnical charge has been ignited. The radiation emitter may comprise the transmitter unit of a proximity fuze carried by the projectile.

Abstract: A projectile comprises an elongated casing containing a payload, a proximity fuze, a transmitter unit operative to transmit a beam of radiation toward a target, and a receiver unit responsive to radiation reflected from the target for controlling the proximity fuze to selectively initiate operation of the payload at a predetermined distance from the target. The transmitter unit is located adjacent the tail end of the projectile rearward of the payload and comprises a pyrotechnical charge positioned at the extreme rear of the projectile and operative, when ignited, to cause emission of light via a lens in an opening in the side of the projectile to form the transmitted beam of radiation. The receiver unit is located adjacent the nose end of the projectile forward of the payload to maximize the measuring base between the transmitted and received beams of radiation, and comprises an optical system associated with an interference filter, radiation detector, and electronic control circuit.