JP2006118443A - Safe arm device for laser ignited ordnance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe arm device for laser ignited ordnance having a simple, miniaturizable structure and capable of positively performing switching transmission of ignition laser beams from a laser oscillating device to an objective line selected out of a plurality of transmission lines, corresponding to ignition timing in an arm state but no transmission to any line in a safe state. <P>SOLUTION: The laser ignited ordnance has the laser oscillating device 1, one or more optical fibers 6 receiving emitted ignition laser beams, and a direction control device 10 for controlling the traveling direction of an optical path of the ignition laser beams, wherein the ignition laser beams are transmitted to the optical fibers arranged away from the laser oscillating device by a fixed clearance. In this case, a mechanism is provided for switching to transmit or not to transmit the ignition laser beams from the laser oscillating device to the optical fiber selected out of the one or more optical fibers by controlling the direction control device. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

  The present invention relates to a safe arm device for laser ignition products. More specifically, the present invention relates to a safety device applied to laser ignition products for aerospace products such as rockets, artificial satellites, aircraft, and missiles.

  Conventionally, many pyrotechnics ignition parts of aerospace products have been electrically ignited to electrically ignite explosives. However, with the adoption of laser ignition products that ignite explosives with laser light, safe arm devices have been developed that serve as safety devices for the laser ignition products. As such a safe arm device for laser ignition pyrotechnics, a method of providing a safe mechanism by blocking laser light with a shielding object has been considered.

  For example, there has been proposed a safe arm device for a laser ignition / ignition product having a mechanism for inserting a shutter in the gap between the upstream optical path side optical fiber and the downstream optical path side optical fiber for transmitting the laser light for ignition. (For example, refer to Patent Document 1). In the method described in Patent Document 1, since the upstream side and the downstream side of the shutter are in a one-to-one relationship, it is advantageous for controlling the ignition of one laser ignition product by one laser oscillation device. It is.

JP-A-8-303300

  When a multi-stage rocket is equipped with a laser-ignited safe arm device, the laser light for ignition of the laser oscillation device is given to each multi-stage rocket ignition device at a predetermined timing (according to the ignition timing of each stage rocket). Timing and ignition timing) are necessary. However, in the system described in Patent Document 1, since the upstream side and the downstream side of the shutter are in a one-to-one relationship, there is a problem that it cannot be applied to a multistage rocket as it is.

  As a solution to this problem, it is possible to use the same number of safe arm devices for laser ignition pyrotechnics for each multistage rocket ignition device. The problem arises that it must be large. As another solution, in the method described in Patent Document 1, a means can be considered in which a downstream transmission path is branched into a plurality of parts and a mechanism for switching the transmission path at a predetermined timing is provided. In order to add a new mechanism, there arises a problem that the structure of the system must be complicated.

  As described above, in the safe arm device for laser ignition pyrotechnics described in Patent Document 1, when applied to a multistage rocket, a complicated structure must be taken. There was a very difficult problem.

  The present inventors have removed the above-described problems, switching the laser light for ignition from the laser oscillation device to a target path selected from a plurality of transmission paths at the time of arm, As a result of earnest research for the purpose of providing a safe arm device for laser ignition pyrotechnics that can be reliably transmitted without being transmitted through any path, and that has a simple and miniaturizable structure, laser oscillation The inventors have found a simple system that can be switched to a predetermined transmission path or cutoff path only by controlling the traveling direction of the laser light for ignition from the apparatus, and have made the present invention.

  Accordingly, the present invention includes a laser oscillation device that emits an ignition laser beam, one or more optical fibers that receive the ignition laser beam, and a direction control device that controls the traveling direction of the optical path of the ignition laser beam. In a laser ignition pyrotechnic product for transmitting an ignition laser beam emitted from an oscillation device to an optical fiber disposed at a certain distance from the laser oscillation device, the laser beam for ignition from the laser oscillation device is controlled by controlling the direction control device. Is transmitted to an optical fiber selected from the one or a plurality of optical fibers, or is switched so as not to be transmitted to any optical fiber.

  Here, a lens is arranged on the light emitting surface of the laser oscillation device and the light receiving surface of the optical fiber in order to reliably transmit the laser light for ignition, and the traveling direction of the laser light for ignition is controlled. In order to achieve this, the direction control device is constituted by a mirror, the direction control device is attached to an electric motor or the like, and is rotationally driven by the electric motor.

  That is, the safe arm device for laser ignition products of the present invention has a simple structure by performing transmission and cutoff path selection at the time of arm and safe using a switching mechanism for the direction of travel of the laser light for ignition. Is something that can be done.

  According to the present invention, in spite of a simple and miniaturizable structure, the laser light for ignition from the laser oscillation device can be switched and transmitted to a target path selected from a plurality of transmission paths at the time of arm, In safe time, it is possible to reliably carry out no transmission to any path.

  The present invention will be specifically described with reference to the drawings. FIG. 1 shows an embodiment of a safe arm device for laser ignition pyrotechnics according to the present invention.

  In FIG. 1, 1 is a laser oscillation device, 2 is a diffusion lens, 3 is a transmission optical fiber series for the first stage rocket motor, 4 is a transmission optical fiber series for the second stage rocket motor, 5 is a sleeve, and 6 is an optical fiber core. Reference numeral 7 denotes an optical fiber connector, 8 denotes a condenser lens, 9 denotes a rotary drive motor, and 10 denotes a reflecting mirror.

  Although not shown in the drawing, an ignition device of a rocket motor, for example, is located downstream of each optical fiber 6, and the ignition laser light from the safe arm device for laser ignition and pyrotechnics is used to ignite the inside of the ignition device. The ignition agent is ignited, and finally the propellant in the rocket motor is ignited.

  As the laser oscillation device 1, a laser oscillation device having an output in which the transmitted laser light sufficiently ignites the igniting agent is used. From the viewpoint of downsizing the entire system, for example, a high output type laser diode is used. A diffusion lens 2 is disposed on the light emitting surface of the laser oscillation device 1. The diffusion lens 2 is a single-sided convex lens, and plays a role of diffusing and emitting the ignition laser light emitted from the laser oscillation device 1 downstream.

  The first stage rocket motor transmission optical fiber series 3 and the second stage rocket motor transmission optical fiber series 4 are composed of an optical fiber core wire 6, an optical fiber connector 7, and a condenser lens 8. An optical fiber core wire 6 is held at the center of the optical fiber connector 7. A condensing lens 8 is disposed on the light receiving surface of the optical fiber connector 7. The condensing lens 8 is a convex lens on one side, and condenses the ignition laser light emitted from the upstream and transmits it to the optical fiber core 8 on the downstream side.

  The laser oscillation device 1, the first stage rocket motor transmission optical fiber series 3, and the second stage rocket motor transmission optical fiber series 4 are connected by a sleeve 5. In the case of this embodiment, the sleeve has a shape in which three cylinders are combined, and the center axis of each cylinder is on the same plane so that the laser light for ignition is transmitted to each optical fiber series 3 and 4 without deviation. They are arranged so as to overlap.

  Inside the sleeve 5, the laser oscillation device 1, the first stage rocket motor transmission optical fiber series 3, and the position where the optical axes of the second stage rocket motor transmission optical fiber series 4 overlap are centered. The reflecting mirror 10 constituting the direction control device is arranged and plays a role of reflecting the ignition laser beam. The reflecting mirror 10 is inserted into the inside from the bottom surface of the sleeve 5, and the lower part of the reflecting mirror 10 is connected to the rotation drive motor 9.

  The rotary drive motor 9 constitutes a mechanism for switching the traveling direction of the laser light for ignition. The rotation drive motor 9 has a rotation angle set in advance, and rotates the reflecting mirror 10 at a predetermined timing (for example, timing corresponding to ignition and non-ignition timing for each stage of the rocket motor). The traveling direction of the ignition laser beam can be switched. For example, an electric motor is used as the rotation drive motor 9.

  Next, the operation mechanism will be described.

  In the safe mode when none of the ignition devices is ignited, the rotational drive motor 9 is not rotationally driven. Therefore, the initial position of the reflecting mirror 10 is a position where the traveling direction of the laser light for ignition does not reflect and transmit to any of the transmission optical fiber series 3 and 4. For this reason, even if the laser oscillation device 1 emits an ignition laser beam due to a malfunction due to a stray current or the like, the ignition laser beam is not reflected and transmitted to any of the transmission optical fiber series 3 and 4, and therefore, the downstream ignition The device will not ignite.

  In the arm mode in which the first stage rocket motor ignition device is ignited, the reflecting mirror 10 is rotated by the rotational drive of the rotary drive motor 9, and the traveling direction of the laser oscillation device 1 is the transmission optical fiber for the first stage rocket motor. The laser beam for ignition from the laser oscillation device 1 is finally transmitted downstream from the transmission optical fiber series 3 for the first stage rocket motor. The angle position of the reflecting mirror 10 shown in FIG. 1 represents the case where the ignition laser beam is transmitted to the transmission optical fiber series 3 for the first stage rocket motor.

  Even in the arm mode when the second stage rocket motor ignition device is ignited, by similarly rotating the reflecting mirror 10, the laser light for ignition from the laser oscillation device 1 is finally used for the second stage rocket motor. It is transmitted downstream of the transmission optical fiber series 4.

  In these arm modes, if the position of the reflecting mirror 10 is not accurately arranged, the transmission loss of light energy increases. For this reason, in order to keep transmission loss low, for example, an arrangement guide that allows the position of the reflecting mirror 10 to be arranged with high accuracy and a stopper that accurately stops the rotary drive motor 9 are applied.

  In the above-described first embodiment, the direction control device that controls the traveling direction of the ignition laser beam is configured by the reflecting mirror 10. The reflecting mirror 10 may be configured such that one side is configured as a reflecting surface, or both surfaces are configured as reflecting surfaces.

  Further, a two-position or three-position linear reciprocating drive means may be employed as the direction control device. In this case, the first stage rocket motor transmission optical fiber series 3 and the second stage rocket motor transmission optical fiber series 4 are arranged in parallel, and the laser oscillation device 1 is arranged to face these series 3 and 4, A three-position linear reciprocating drive means as a direction control device is provided.

  The laser oscillation device 1 and the first stage rocket motor are moved by moving the laser oscillation device 1 or the first stage rocket motor transmission optical fiber series 3 or the second stage rocket motor transmission optical fiber series 4 by the direction control device. By selectively making the transmission optical fiber series 3 or the second stage rocket motor transmission optical fiber series 4 face each other, or by arranging the laser oscillation device 1 at a position that does not face each series 3, 4, the laser It is possible to control the traveling direction of the laser light for ignition from the oscillation device 1.

  Further, a 90 degree prism may be adopted as the direction control device. In this case, the laser oscillation device 1, the first stage rocket motor transmission optical fiber series 3, and the second stage rocket motor transmission optical fiber series 4 are arranged in parallel, and the three-position linear reciprocating drive means as the switching mechanism is used. It is comprised so that it can drive by.

  In the direction control device, the linear reciprocating drive means is operated to move the prism by 90 degrees, thereby reflecting the ignition laser beam from the laser oscillation device 1 and changing the traveling direction of the ignition laser beam to the first direction. It is possible to control so as to lead to the transmission optical fiber series 3 for the stage rocket motor or the transmission optical fiber series 4 for the second stage rocket motor.

  In the safe arm device for a laser ignition product of the present invention having the above-described configuration, the laser light emitted from one laser oscillation device 1 is selected from one or a plurality of optical fibers 6 corresponding to the ignition timing. In the safe mode in which data can be reliably transmitted to the target optical fiber and is not transmitted to any optical fiber, it is not reliably transmitted to any optical fiber. For this reason, it can be advantageously applied to laser ignition products for aerospace products having a plurality of ignition parts having different ignition timings, including multistage rockets.

It is explanatory drawing of one Example of the safe arm apparatus for laser ignition pyrotechnics of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Laser transmitter 2 ... Diffuse lens 3 ... Transmission optical fiber series for 1st stage rocket motors 4 ... Transmission optical fiber series for 2nd stage rocket motors 5 ... Sleeve 6 ... Optical fiber core wire 7 ・ ・ ・ Optical fiber connector 8 ・ ・ ・ Condensing lens 9 ・ ・ ・ Rotation drive motor 10 ・ ・ ・ Reflective mirror

Claims (4)

Ignition emitted from a laser oscillation device having a laser oscillation device that emits an ignition laser beam, one or more optical fibers that receive the laser beam for ignition, and a direction control device that controls the traveling direction of the optical path of the laser beam for ignition In a laser ignition pyrotechnic product for transmitting a laser beam for a laser beam to an optical fiber disposed at a certain distance from the laser oscillation device, the one or a plurality of ignition laser beams from the laser oscillation device are controlled by controlling the direction control device. A safe arm device for a laser ignition / ignition product, which has a mechanism for switching to transmit to an optical fiber selected from the above optical fibers or to prevent transmission to any optical fiber. The safe arm device for a laser ignition / ignition product according to claim 1, wherein lenses are arranged on the light emitting surface of the laser oscillation device and the light receiving surface of the optical fiber. 3. The safe arm device for laser ignition pyrotechnics according to claim 1, wherein the direction control device is constituted by a mirror. 4. The laser ignition according to claim 1, wherein the direction control device is rotationally driven by an electric motor in the mechanism for controlling the traveling direction of the laser light for ignition from the laser oscillation device using the direction control device. Safe arm device for pyrotechnics.

Images