Opto-electronic Hybrid Safety Ignition

Safety design is one of key parts in weapon systems. Photoelectric combination ignition isolates explosives from power supply by a optical way. This essentially eliminates the possibility of accidental RF energy coupling to the exploder, so that ignition by EMI is avoid. The ignition way follows the energy excludability principle. Ignition authorization is controlled by optical codes. That means it follows the information excludability principle. Finally, the system can be opened for once-forbidden try, that is to say, it follows accident suffocation principle to some degree. At the same time, photoelectric combination ignition is implemented by a way that a photoelectric converter in the exploding cell converts exterior energy to electric one and then the energy storage capacitor is charged and discharged. This ignition way only need moderate optical power density, and is easier to be realized.In this paper, theoretical analysis is made about some components of the ignition system, the control subsystem is researched, and the relevant circuits are designed, as follows:1. Based on the safety principle, the control system of photoelectric combination ignition is constructed in which energy and code is transmitted independently and both energy and ignition are controlled by 24-bits code.2. In order to realize the control circuit of ignition system, researches on relevant components are done to some degree. They include: match and coupling between the output optical fiber of lasers and photoelectric cells; equivalent circuits of the photoelectric cell array and its output characteristics; operating principle and experiment of discharge characteristics of SCB.3. Based on the system scheme of control circuit, the read-write code circuit, the laser emitting code control circuit, the optical code controlled ignition circuit and the secret key circuits have been studied, analyzed and designed. Especially, the technique of micro power dissipation is solved by circuit design. A novel and simple optical pulse receiver has been designed for the special requirement of optical code receiving.4. Photoelectric combination ignition system is constructed, and the prototype is brought forth by reasonable system design and match. Based on test and analysis of the ignition system, an improved scheme is presented. For example, an assumption of a optical signal feedback method is used for energy storage in the capacity of the ignition device for more controllability.