Laser ignition system with double-security design

Abstract

The invention discloses a semiconductor laser ignition system with a double security design, which belongs to the field of semiconductor laser ignition systems. The semiconductor laser ignition system comprises a singlechip system, a voltage-controlled current source, a laser, a first optical fiber connector, a second optical fiber connector, a laser detonator joint, a laser detonator, a photoelectric detector, an upper computer, a current-limiting resistor, a current-limiting switch and a normally-closed relay, wherein the singlechip system is connected with the upper computer, the voltage-controlled current source, the current-limiting switch, the normally-closed relay and the photoelectric detector respectively; the current-limiting switch is connected in parallel to two ends of the current-limiting resistor; the normally-closed relay is connected in parallel to two ends of the laser; the laser is connected with the voltage-controlled current source, the current-limiting resistor, the current-limiting switch and the first optical fiber connector respectively; the photoelectric detector is connected with the second optical fiber connector; and the laser detonator joint is connected with the laser detonator. In a security mode, static electricity is prevented from puncturing the laser. In a detection mode, the detection light power output by the laser is kept in a safe range. In an ignition mode, the laser can work in a rated state.

Description

technical field [0001] The invention belongs to the field of semiconductor laser ignition systems, in particular to a semiconductor laser ignition system with double security design. Background technique [0002] In the laser ignition system, high-power laser pulses are transmitted to the surface of the ignition agent of the laser pyrotechnics through an optical fiber, thereby detonating the pyrotechnics. The self-detection function of the laser ignition system requires the detection of the continuity of the optical path, so the ignition laser needs to be able to output low-power safe detection light to irradiate the laser pyrotechnics, and the optical window of the laser pyrotechnics reflects part of the incident light to the detection fiber, and then The power of the reflected light is detected by the photodetector to judge the continuity of the optical path. [0003] In a traditional laser ignition system, the ignition laser is directly driven by a voltage-controlled cur...

AI Technical Summary

Problems solved by technology

This method has a simple structure but is difficult to guarantee safety. The stability of the voltage-controlled current source and any electromagnetic interference it receives will directly affect the output of the ignition laser, which in turn will lead to malfunctions of pyrotechnics.

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