Short delay trigger ignition circuit

Abstract

The invention discloses a short delay trigger ignition circuit. The short delay trigger ignition circuit comprises a power supply voltage reduction circuit, a delay circuit and an ignition circuit; the power supply voltage reduction circuit reduces the supply voltage of a power supply to the operating voltage of the delay circuit; the delay circuit adopts two-stage monostable triggers, the primarymonostable trigger performs delaying according to a pulse signal loaded by a trigger signal input end, and the secondary monostable trigger outputs a trigger signal to trigger the ignition circuit after delaying is performed for a set time; the ignition circuit comprises a charging current limiting resistor, an energy storage capacitor and an electric explosive device connected in series betweenthe power supply and ground; the two ends of the energy storage capacitor and the electric explosive device are connected with a thyristor in parallel; and when the trigger signal input end loads thepulse signal to enable the delay circuit to output the trigger signal to trigger the thyristor to be turned on, the energy storage capacitor performs discharging on the electric explosive device through the thyristor, and the electric explosive device is detonated and ignited. The short delay trigger ignition circuit can be reliably started and stably operated in a wide temperature range, especially at low temperature, and can be operated in a wide power supply range.

Description

technical field [0001] The invention relates to a delay trigger ignition circuit, in particular to a short delay trigger which can work stably in a wide temperature range, especially at low temperature, has a relatively simple principle, can work in a wide power supply voltage range, and can output a large current ignition circuit. Background technique [0002] In the fuze electronic system, it needs to be able to start reliably and work stably in a wide temperature range, especially at low temperature (such as -55°C), and work in a wide power supply voltage range from several volts to tens of volts. A so-called short-delay trigger ignition circuit that is simple and suitable for miniaturized secondary integration with a delay of several milliseconds. [0003] The current delay trigger ignition circuit mostly adopts the method of oscillation counting or MCU software to realize the delay, which may not start reliably or have poor stability at low temperature, the principle i...

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Problems solved by technology

[0003] The current delay trigger ignition circuit mostly adopts the method of oscillation counting or MCU software to realize the delay, which may not start reliably or have poor stability at low temperature, the principle is complicated, the performance requirements of the power supply are high, and it is difficult to carry out miniaturization and secondary integration. And other issues

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