Method and apparatus for controlling passive projectiles

• US 4,738,411 A
• Filed: 05/02/1983
• Issued: 04/19/1988
• Est. Priority Date: 03/14/1980
• Status: Expired due to Fees

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Ahlstrom, Lars G. W., Flogvall, Anders G.
• Primary Examiner(s): Jordan, Charles T.
• Application Number:
  US06/490,747
• Time in Patent Office: 1,814 Days
• Field of Search: 244/3.1, 244/3.13, 244/3.15, 244/3.16, 244/3.19, 89/1.11, 89/157, 102/211, 102/213, 102/214, 102/374
• US Class Current: 244/3.15
• CPC Class Codes: F41G 3/145 using a target illuminator
• CPC Class Codes: F41G 7/226 Semi-active homing systems, i.e. comprising a receiver and involving auxiliary illuminating means, e.g. using auxiliary guiding missiles
• CPC Class Codes: F41G 7/2286 using radio waves
• CPC Class Codes: F41G 7/2293 using electromagnetic waves other than radio waves

Abstract

A method and a system for controlling explosive projectiles having homing devices or proximity fuses responsive to the reception of electromagnetic energy reflected from a target. The homing devices and the proximity fuses are passive receiving devices, fired along with transmitting projectiles which illuminate the target with electrmagnetic energy.

Claims

1. A system for controlling a predetermined offensive operation of a projectile fired against a target, comprising:

(a) at least one transmitting projectile having means for illuminating the target by transmitting electromagnetic radiation toward the target while said transmitting projectile moves along a trajectory;

(b) at least one receiving projectile having means for receiving transmitted radiation reflected by the target and means for performing said predefined offensive operation in response to said reflected radiation while said receiving projectile moves along a trajectory; and

(c) firing means for firing said projectiles into respective trajectories ending at the target, said projectiles being fired with sufficient regularity to ensure that the target is illuminated by at least one transmitting projectile whenever a receiving projectile is within receiving range of transmitted radiation reflected by the target;

(d) said firing means comprising a single firing device and a feeding means for successively feeding transmitting and receiving projectiles to said device in a predefined sequence.

2. A system as in claim 1 where the transmitted radiation has a wavelength in the range of approximately 3-8 mm.

3. A system as in claim 2 where the transmitting projectile includes an antenna adapted for transmitting the illuminating electromagnetic radiation in the form of a lobe having a maximum beam width of 30°

, said lobe being oriented in the general direction of motion of said transmitting projectile.