A Short Delay Trigger Ignition Circuit

Abstract

The invention discloses a short-delay trigger ignition circuit, which comprises a power step-down circuit, a delay circuit and an ignition circuit; the power step-down circuit reduces the supply voltage of the power supply to the working voltage of the delay circuit; the delay circuit adopts two Monostable trigger, the first-level monostable trigger starts to delay according to the pulse signal loaded at the trigger signal input end, and the second-level monostable trigger outputs a trigger signal to trigger the ignition circuit after the delay setting time; the ignition circuit includes The charging current limiting resistor, energy storage capacitor and electric pyrotechnics are connected in series between the power supply and the ground; the two ends of the energy storage capacitor and electric pyrotechnics are connected in parallel with thyristors; the trigger signal input is loaded with a pulse signal to make the delay circuit output a trigger signal When the thyristor is triggered to conduct, the energy storage capacitor discharges the electric pyrotechnics through the thyristor, causing the electric pyrotechnics to detonate and ignite. The circuit can reliably start and work stably in a wide temperature range, especially at a low temperature, and can trigger an ignition circuit with a short delay working in a wide power supply range.

Description

Technical field [0001] The present invention relates to a delayed trigger ignition circuit, in particular a short delay trigger ignition circuit that can operate stably over a wide temperature range, especially at low temperatures, the principle is simpler, can operate over a wide power supply voltage range, and can output a large current. Background [0002] In fuze electronic systems, it is necessary to be able to start reliably and work stably in a wide temperature range, especially at low temperatures (such as -55 ° C), to operate in a wide supply voltage range of several volts to tens of volts, the principle is relatively simple, suitable for miniaturization of secondary integration delay delay in a few milliseconds of the so-called short delay trigger ignition circuit. [0003] At present, the delay trigger ignition circuit mostly uses the oscillation counting type or MCU software to achieve delay, which may not be reliable at low temperatures or has poor stability, comple...

AI Technical Summary

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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