Matra

About: Matra is a based out in . It is known for research contribution in the topics: Signal & Detector. The organization has 1330 authors who have published 1216 publications receiving 17967 citations.

Dual-mode aircraft aerodynamic surface control system

Abstract: The unit has a joystick driving the servo-command and second circuit driving the electrical motor. In normal use the servocommand mechanism drives the aircraft surface, whilst in emergency where the servocontrol command does not work, the motor circuit drives the surface, with vibrations dampened by a servocontrol loop connection.

Apparatus for the investigation of surface chemistry

Abstract: A test piece (1) such as a sheet of metal is irradiated by a high power laser (4) in a vacuum chamber (2). The electromagnetic properties of the plasma formed at the irradiated metal surface are measured by three probes (5, 6, 7), these properties being indicative of the chemical nature of the irradiated surface.

System and method for protection against theft of an object

Abstract: The invention discloses a system providing protection against the theft of an object (13), the said system being located in a passageway and comprising: means for remote querying of electronic modules (10, 11) containing respectively an 'object' identification code (vi) of an object (13), or a 'person' identification code (pi) of a person in possession of an object; these means being capable of receiving the code emitted by each of these; a control module (18) linked to the said remote querying means (14, 15; 14', 15'; 16, 17; 16', 17'), capable of receiving these identification codes and carrying out matching of the 'object' and 'person' codes received and sanctioning the detection of an 'object' code unaccompanied by the corresponding 'person' code.

Method and apparatus for digital transmission of speech between mobile stations

Abstract: A method and a system for digital speech transmission by radio means make use of analysis by multi-pulse excited linear prediction. The system includes, at the transmission end, an MPLPC analysis unit (20) followed by a block encoding circuit (36) and by an interlacing circuit (38).

Image label updating device using serially connected modules

Abstract: A device for making adjustments to the label values of objects within an image being processed. The device, which receives a train of digital signals, identifies signal values within the train which are to be modified, and makes the appropriate modifications. The device comprises a multiple-route shift register arrangement which receives the train of signals and compares these values of each with a series of `to be corrected` values and, on detection of correspondence, replaces them with `correction` values in a third series.