Pyrotechnic detonation constant current ignition module

Abstract

The invention provides an explosion-initiating constant-current ignition module for an initiating explosive device. The explosion-initiating constant-current ignition module comprises a preceding-stage current-limiting circuit and a backward-stage current-limiting circuit, and the preceding-stage current-limiting circuit and the backward-stage current-limiting circuit each comprises a current-limiting circuit and a drive and power circuit. The explosion-initiating constant-current ignition module for the initiating explosive device has the beneficial effects that a solid-state switch MOSFET is selected as a constant-current protection switch to be used for replacing an ignition circuit in former spacecraft initiating explosive devices, constant-current working can be conducted according to instructions, an instruction fault tolerance function is achieved, adjusting and current-limiting resistor replacing are not needed, multiple paths of initiating devices can share one ignition module, and the explosion-initiating constant-current ignition module is a restorable and reusable ignition circuit product. Therefore, the explosion-initiating constant-current ignition module has the advantages of being easy to operate, short in production and adjusting time, high in reliability and the like.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a constant-current ignition module for pyrotechnic detonation. Background technique [0002] At present, domestic pyrotechnic detonation devices are generally composed of relays, MOS tubes, and current-limiting resistors. figure 1 It is a schematic diagram of the working principle of the pyrotechnic detonation device of my country's satellites at present, and only one bus bar is shown in the figure. There are three magnetic latching relays on the detonation line as the power-on and power-off switches of the busbar and the return line and the control switch of the normally open electric explosion valve, and the four electronic switches are used as four insurances for the pyrotechnic detonation device, which can effectively prevent any one of them. False detonation caused by misoperation. Using the Hall current sensor as the measuring element of the detonation current requires the meas...

AI Technical Summary

Problems solved by technology

Therefore, the selection and replacement of current-limiting resistors is a very cumbersome process, which virtually increases the difficulty for the development of pyrotechnic controllers.

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