Electronic control module for detonator has protective screen between printed circuit card and tubular casing

摘要

The electronic control module consists of a printed circuit (PC) card (1) with components, contained within a tubular casing (12) of seamless stainless steel and embedded in a resin. It has a protective screen (3) between the card and the casing, the screen having an insulated surface towards the casing and a conducting surface facing the card and connected electrically to it. The electronic control module consists of a printed circuit (PC) card (1) with components, contained within a tubular casing (12) of seamless stainless steel and embedded in a resin. It has a protective screen (3) between the card and the casing, the screen having an insulated surface towards the casing and a conducting surface facing the card and connected electrically to it. The screen is made from a sheet of a supple and elastic plastic material with its conducting face, apart from an outer margin, coated with a conducting ink. The module also contains an electrochemical capacitive component in a shock-absorbing shell.