JP2006118444A - Safe arm device for laser ignited ordnance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe arm device for a 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, in an arm state but no transmission to any line in a safe state. <P>SOLUTION: The laser ignited ordnance has a laser oscillating device 1 for emitting ignition laser beams, and one or more optical fibers 6 for receiving the ignition laser beams, wherein the ignition laser beams are transmitted to the optical fibers 6 arranged away from the laser oscillating device 1 by a fixed clearance. In this case, a mechanism is provided for switching to transmit the ignition laser beams to the optical fiber 6 selected out of the one or more optical fibers 6 or not to transmit the ignition laser beams to any optical fibers 6 by controlling the irradiating direction of the ignition laser beams from the laser oscillating device 1. <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 applying a safe arm device for laser ignition products to a multistage rocket, the laser light for ignition of the laser oscillation device is given to each multistage 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 irradiation direction of the laser light for ignition from the apparatus, and have made the present invention.

  Accordingly, the present invention has a laser transmitter that emits an ignition laser beam and an optical fiber that receives one or more ignition laser beams, and the ignition laser beam emitted from the laser oscillator is separated from the laser oscillator by a fixed gap. In this case, the ignition laser beam is selected from the one or more optical fibers by controlling the irradiation direction of the ignition laser beam from the laser oscillation device. It is characterized by having a mechanism for switching so as to transmit to an optical fiber or not to transmit to any optical fiber.

  Here, a lens is disposed 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 beam for ignition, and the laser beam for ignition from the laser oscillation device is used. The mechanism for controlling the irradiation direction has a structure in which the laser oscillation device is driven to rotate by an electric motor.

  That is, the safe arm device for laser ignition product of the present invention has a simple structure by combining the switching mechanism of the irradiation direction of the laser light for ignition and the switching mechanism of transmission and cutoff path selection at the time of arm and safe. 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 is a plan view of an embodiment of a safe arm device for laser ignition pyrotechnics according to the present invention, and FIG. 2 is a side view of a laser oscillation device section.

  1 and 2, 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, and 5 is a safety barrier wall. , 6 are optical fiber core wires, 7 is an optical fiber connector, 8 is a condensing lens, 9 is a rotational drive motor, and 10 is a mounting frame for the laser oscillation device.

  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 irradiating 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 collects the laser light for ignition irradiated from the upstream side and transmits it to the optical fiber core 8 on the downstream side.

  FIG. 2 shows a mechanism for controlling the irradiation direction of the laser light for ignition to selectively transmit to each transmission optical fiber series 3, 4 and when not transmitting to any transmission optical fiber series 3, 4. Is described. As shown in the figure, the laser oscillation device 1 is attached to a laser oscillation device mounting base 10, and the rotational drive motor 9 is connected to the laser oscillation device mounting base 10. Therefore, by rotating the rotation drive motor 9, the laser oscillation device mounting base 10 and the laser oscillation device 1 can be rotated in a desired direction to control the irradiation direction of the ignition laser light emitted from the laser oscillation device 1. it can.

  In particular, the rotation drive motor 9 has a rotation angle set in advance, and is used for ignition emitted from the laser oscillation device 1 at a predetermined timing (for example, timing corresponding to ignition and non-ignition timing for each stage rocket motor). The irradiation direction of the 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 a safe mode state in which no rocket motor ignition device is ignited, the laser oscillation device 1 is connected to the transmission optical fiber series 3 for the first stage rocket motor and the transmission optical fiber series 4 for the second stage rocket motor. It is located in the direction that does not face. The direction of the laser oscillation device 1 in this case is not particularly limited, and can be directed in the middle direction between the transmission optical fibers 3 and 4 or in the direction facing the safe blocking wall 5.

  In the arm mode when the first stage rocket motor ignition device is ignited, the laser oscillation device attachment task 10 rotates as the rotation drive motor 9 rotates, and the irradiation direction of the laser oscillation device 1 is the first stage rocket motor. The laser light for ignition from the laser oscillation device 1 is finally transmitted downstream of the transmission optical fiber series 3 for the first stage rocket motor. The angular position in the irradiation direction of the laser oscillation device 1 shown in FIG. 1 represents a case where the laser light for ignition 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, the rotary drive motor 9 is similarly driven to rotate, so that the laser light for ignition from the laser oscillation device 1 is finally converted into the second stage rocket motor. The transmission optical fiber series 4 is transmitted downstream.

  In these arm modes, if the light emitting surface of the laser oscillation device 1 and the light receiving surfaces of the transmission optical fiber series 3 and 4 are not accurately aligned, the transmission loss of light energy increases. For this reason, for example, a method of applying an arrangement guide that enables the position of the laser oscillation device 1 to be arranged with high precision and a stopper that accurately stops the rotation drive motor 9 is adopted so as to keep transmission loss low.

  In the safe mode when none of the ignition devices is ignited, the rotation drive motor 9 is not driven to rotate, so the irradiation direction of the laser oscillation device 1 does not face any transmission optical fiber series 3 or 4. 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 transmitted to any of the transmission optical fiber series 3 and 4, and therefore the ignition of the downstream ignition device is ignited. Will never happen.

  There is nothing on the downstream side of the ignition laser light in the safe mode, but the reflection of the laser light has an adverse effect on the components in the system, or the reflected light enters the transmission optical fiber line and the transmission path is established. If it does, install the safety barrier 5. For the safety barrier 5, for example, a material that hardly reflects the laser light is used so that the reflected light of the laser light does not adversely affect the other.

  In the safe arm device for a laser ignition / ignition product of the present invention configured as described above, the laser light emitted from one laser oscillation device 1 is output from one or a plurality of optical fibers 6 in correspondence with the ignition timing. In the safe mode in which transmission can be reliably performed on the selected target optical fiber and transmission is not performed on any optical fiber, transmission is not reliably performed on 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 plane explanatory drawing of one Example of the safe arm apparatus for laser ignition pyrotechnics of this invention. It is side surface explanatory drawing of a laser oscillation apparatus part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Laser oscillation apparatus 2 ... Diffuse lens 3 ... Transmission optical fiber series for 1st stage rocket motors 4 ... Transmission optical fiber series for 2nd stage rocket motors 5 ... Safety barrier 6・ ・ ・ Optical fiber core 7 ・ ・ ・ Optical fiber connector 8 ・ ・ ・ Condensing lens 9 ・ ・ ・ Rotation drive motor 10 ・ ・ ・ Laser oscillation device mounting base

Claims (3)

Light that has a laser transmitter that emits laser light for ignition and an optical fiber that receives one or more laser light for ignition, and is arranged such that the laser light for ignition emitted from the laser oscillator is spaced apart from the laser oscillator by a fixed gap In the laser ignition product to be transmitted to the fiber, the ignition laser beam is transmitted to the optical fiber selected from the one or more optical fibers by controlling the irradiation direction of the ignition laser beam from the laser oscillation device. Or a safe arm device for laser-ignition pyrotechnics, characterized by having a mechanism for switching so as not to transmit 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 a laser ignition pyrotechnic product according to claim 1, wherein the laser oscillation device is rotationally driven by an electric motor in the mechanism for controlling the irradiation direction of the laser light for ignition from the laser oscillation device.

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