SE8900515D0 - INITIATING SYSTEM - Google Patents

INITIATING SYSTEM

Info

Publication number
SE8900515D0
SE8900515D0 SE8900515A SE8900515A SE8900515D0 SE 8900515 D0 SE8900515 D0 SE 8900515D0 SE 8900515 A SE8900515 A SE 8900515A SE 8900515 A SE8900515 A SE 8900515A SE 8900515 D0 SE8900515 D0 SE 8900515D0
Authority
SE
Sweden
Prior art keywords
capacitor
light energy
energy
frequency
inductor
Prior art date
Application number
SE8900515A
Other languages
Swedish (sv)
Other versions
SE8900515L (en
Inventor
J R Simon
Original Assignee
Cxa Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cxa Ltd filed Critical Cxa Ltd
Publication of SE8900515D0 publication Critical patent/SE8900515D0/en
Publication of SE8900515L publication Critical patent/SE8900515L/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F42D1/045—Arrangements for electric ignition
    • F42D1/05—Electric circuits for blasting

Abstract

Pulsating coded light energy is identified in a firing unit which converts the light energy to electrical energy which is stored in a capacitor 12 and then transferred to an ignition resistor 68 of a detonator. A light bulb 9 and an LED 15 are energised with pulsed D.C. and are respectively coupled to a solar cell 10 and a photodiode 16. Each D.C. pulse causes cell 10 to convert light energy into electrical energy at a voltage insufficient to activate resistor 68 and this electrical energy is stored in an inductor 24. Each time a transistor 30, controlled by diode 16, turns off a high voltage spike is generated and the energy inductor 24 is transferred to capacitor 12. When the voltage on capacitor 12 reaches a predetermined level, a zener diode 37 turn on FET 45 to discharge capacitor 12 through ignition resistor 68. The system only operates within a given range of frequencies and duty cycles of the pulsed light energy. If the frequency or duty cycle is too low a capacitor 31 will not charge up so that an inverter 29 then provides a low impedance across capacitor 12 to inhibit activation of ignition resistor 68. The upper frequency limit depends on the frequency response of photo diode 16 and the time constant of the inductor circuit. The light energy may alternatively be coded by wavelength instead of by pulsating frequency/duty cycle. <IMAGE>
SE8900515A 1988-02-25 1989-02-15 TAENDSYSTEM SE8900515L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000559861A CA1326068C (en) 1988-02-25 1988-02-25 Detonator firing system

Publications (2)

Publication Number Publication Date
SE8900515D0 true SE8900515D0 (en) 1989-02-15
SE8900515L SE8900515L (en) 1989-08-26

Family

ID=4137513

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8900515A SE8900515L (en) 1988-02-25 1989-02-15 TAENDSYSTEM

Country Status (6)

Country Link
AU (1) AU602398B2 (en)
BR (1) BR8900823A (en)
CA (1) CA1326068C (en)
GB (1) GB2216349A (en)
SE (1) SE8900515L (en)
ZA (1) ZA889661B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPO906897A0 (en) 1997-09-09 1997-10-02 F F Seeley Nominees Pty Ltd Improvements in actuators
PE20060926A1 (en) 2004-11-02 2006-09-04 Orica Explosives Tech Pty Ltd ASSEMBLIES OF WIRELESS DETONATORS, CORRESPONDING BLASTING APPLIANCES AND BLASTING METHODS
WO2013151604A1 (en) 2012-01-13 2013-10-10 Los Alamos National Security, Llc Explosive assembly and method
US10273792B2 (en) 2013-07-15 2019-04-30 Triad National Security, Llc Multi-stage geologic fracturing
US10246982B2 (en) 2013-07-15 2019-04-02 Triad National Security, Llc Casings for use in a system for fracturing rock within a bore
WO2015009752A1 (en) 2013-07-15 2015-01-22 Los Alamos National Security, Llc Fluid transport systems for use in a downhole explosive fracturing system
CN110375599A (en) * 2019-07-16 2019-10-25 广西中爆电子科技有限公司 For the anti-radio frequency interference circuit in electric detonator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091734A (en) * 1977-02-22 1978-05-30 The United States Of America As Represented By The Secretary Of The Navy Aircraft to weapon fuze communication link
US4089268A (en) * 1977-03-30 1978-05-16 The United States Of America As Represented By The United States Department Of Energy Safe arming system for two-explosive munitions
EP0003396A1 (en) * 1978-02-01 1979-08-08 Imperial Chemical Industries Plc Control circuit for energizing an electrically ignited load
DE3138073A1 (en) * 1981-09-24 1983-04-14 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT FOR TRANSMITTING MEASURED VALUES TO A REMOTE SITE
FR2544069B1 (en) * 1983-04-07 1985-10-04 Seat Bourges Sa PROJECTILE CONTAINING AN ELECTRICALLY ACTIVABLE CHARGE AND WEAPON SYSTEM IMPLEMENTING SUCH A PROJECTILE
ATE45036T1 (en) * 1984-09-04 1989-08-15 Ici Plc METHOD AND DEVICE FOR SAFE REMOTE CONTROLLED INITIATION OF FIRING ELEMENTS.

Also Published As

Publication number Publication date
CA1326068C (en) 1994-01-11
SE8900515L (en) 1989-08-26
ZA889661B (en) 1989-10-25
GB2216349A (en) 1989-10-04
AU602398B2 (en) 1990-10-11
GB8904269D0 (en) 1989-04-12
AU1519988A (en) 1989-09-21
BR8900823A (en) 1989-10-17

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Legal Events

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Effective date: 19920901