Self-inspection circuit and method for protective switch in ignition circuit of pyrotechnics

Abstract

A self-check circuit and method for a protection switch in an initiating explosive device ignition circuit is provided. A main circuit is formed by a primary current limiting switch A, a secondary current limiting switch A, a safety switch A, and a short circuit protection switch A that are successively connected in series, wherein the primary current limiting switch A is connected in parallel with a primary current limiting resistor, the secondary current limiting switch is connected in parallel with a secondary current limiting resistor, the short circuit protection switch A is connected inparallel with an initiating explosive device, self-check circuits are disposed at the primary current limiting switch A, the secondary current limiting switch A, the safety switch A, and the short circuit protection switch A, the primary current limiting switch A, the secondary current limiting switch A, and the safety switch A are all in normally open states, and the short circuit protection switch A is in a normally closed state.

Description

Technical field [0001] The invention belongs to the field of self-checking circuits, and in particular relates to a self-checking circuit and method for a protective switch in an ignition circuit of a pyrotechnic device. Background technique [0002] Projectile launching is an indispensable test for the development of the same type of projectile. The ignition control system, as the command center for the launch of the projectile, plays a vital role in the entire launch process. It not only provides launch instructions for the projectile, but also provides trigger signals for the relevant systems that self-check the working status of the projectile during launch. Therefore, the ignition control system has become a very important part of the successful launch of the projectile. [0003] In order to prevent mis-ignition of pyrotechnic products, the current protection of pyrotechnic products adopts multi-level switches. The protection is achieved by closing the switches in stages and ...

AI Technical Summary

Problems solved by technology

In the case of access to pyrotechnics, it cannot meet the requirements of real-time self-inspection