Patent ID: 11879716
Assignee: DETNET SOUTH AFRICA (PTY) LTD
Field: Other special machines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A detonator which is configured to be connected to an end of a shock tube which, upon ignition, generates a shock tube event at an end of the shock tube, the detonator including at least a first sensor and a second sensor, a processor and a timer, wherein the first sensor upon detecting a first characteristic associated with a shock tube event transmits a first signal at a time T0 to the processor which via the timer initiates a timing schedule in which:
(a) at a time T1, which is at an end of a first predetermined time interval (P1) commencing at the time T0, the processor determines whether the first sensor detects the first characteristic at the time T1,
(b) at a chosen time after T0 it is established whether prior to T0 the second sensor had detected a reference characteristic of a shock tube event,
(c) after a time T3 at which time the first characteristic, if produced by a genuine shock tube event, is absent, the processor determines whether the second sensor has sensed a second characteristic of the shock tube event, and
(d) wherein the shock tube event is validated if the second sensor has sensed such second characteristic.