Double-line constant-current ignition driving circuit

Abstract

The invention discloses a double-line constant-current ignition driving circuit. The problem that after an existing ignition device carries out ignition, ignition bridge wires are in lap joint, and dangerous short circuit current is generated is solved. During ignition, an ignition time-delay circuit provides high-spot levels, and passes through a second triode V2 base electrode current limiting resistor R4 and a second triode V2 base electrode current limiting resistor R6, and then the ignition time-delay circuit is connected with a second triode V2. The level of a grid electrode of a first P-type field effect transistor Q1 is lowered, the first P-type field effect transistor Q1 is connected, and current of a lithium battery power source 1 flows out to a drain electrode through a source electrode of the first P-type field effect transistor. The current can be output to a source electrode of a second P-type field effect transistor Q2 through an adjustable resistor R8. Voltage obtained after voltage dividing of a divider resistor R9 and a second divider resistor R10 is applied to a grid electrode of the second P-type field effect transistor Q2. At this moment, the second P-type field effect transistor is connected, current flows out to the drain electrode from the second P-type field effect transistor and finally flows into an explosive bolt ignition bridge wire, and an explosive bolt is ignited. The circuit is simple in structure, ignition current can be adjusted conveniently, and generation of dangerous short circuit current is effectively restrained.

Description

technical field [0001] The invention relates to an electronic ignition circuit, in particular to an electronic ignition circuit for an explosive bolt. Background technique [0002] Explosive bolt is a kind of bolt with a cavity inside, and explosives and ignition bridge wire are installed in the cavity. The electronic ignition circuit inputs rated ignition current to the ignition bridge wire to detonate the explosive in the cavity, so that the whole bolt is separated into two parts. part; at present, existing explosive bolt ignition devices are designed according to the rated ignition current required by specific explosive bolts, and cannot be suitable for the ignition requirements of different explosive bolts; the ignition current designs of existing electronic ignition devices are all relatively Large, its power supply is a lithium battery with limited capacity. After the ignited explosive bolt explodes, the two poles of the ignition bridge wire are lapped to the metal wal...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a dual-channel constant current ignition driving circuit, which solves the technical problem that the existing ignition device cannot ignite multiple explosive bolts of the same type at the same time and the ignition bridge wire overlaps after ignition to form a dangerous short-circuit current.

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