U.S. Philips Corporation

Telecommunications Radioelectriques Et Telephoniques T.r.t.

Serge Paturel

Roland Allezard

Francois Magne

Francedillaois Magne

An anti-tank trap (1) is constituted by a support (2), a military payload (3), an igniter (4) and a sight (5). The firing on the target is carried out at the time t.sub.d in a plane .DELTA.. The invention is characterized by the following chronological series of stages:

Process for producing an automatic command for an anti-tank trap and

The arrangement (201) comprises an optical narrow detection beam (203) focussing system for a passive infrared radiation in accordance with a reference plane (U). A filter selects the spectral analysis band and at least one passive infrared radiation detector is provided in the focal plane. According to the invention, the arrangement comprises a first analog processing chain and a second digital processing chain by means of which it is possible to recover in accordance with a characteristic curve at least the undercarriage of vehicles. On this curve, each turning element of the undercarriage assumes the shape of an identifiable pulse. The arrangement is used in the identification of moving vehicles in a predetermined plane.

Intrusion detection and identification arrangement for land vehicles

The sensor (1), of the FM-CW type, comprises a transceiver aerial (2) which is rigidly attached to the support of the sensor and is of the frequency scanned beam steering type. The sensor radiates a frequency F of several GHz according to a sawtooth pattern which is nearly linear, generates a beat signal (F.sub.b) between a transmitted wave and a received wave an comprises an analog processing circuit (17) for the signal F.sub.b, digitizing means for F.sub.b (22), memories for time-division samples (28) and frequency-division samples (33), and digital processing means (31) transforming sequences (SU) of time-division samples into sequences (SV) of frequency-division samples. The order number of each sequence is representative of a strip of pixels of the map and the order number of a sample in a sequence is representative of a distance of a pixel on the map.

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Orsay, France

Serge Paturel