WO1994015169B1 - Digital delay unit - Google Patents
Digital delay unitInfo
- Publication number
- WO1994015169B1 WO1994015169B1 PCT/US1993/012319 US9312319W WO9415169B1 WO 1994015169 B1 WO1994015169 B1 WO 1994015169B1 US 9312319 W US9312319 W US 9312319W WO 9415169 B1 WO9415169 B1 WO 9415169B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- output
- delay unit
- electric
- input
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 claims abstract 15
- 230000035939 shock Effects 0.000 claims abstract 4
- 238000005474 detonation Methods 0.000 claims abstract 3
- 238000005422 blasting Methods 0.000 claims abstract 2
- 238000004146 energy storage Methods 0.000 claims 5
- 238000006243 chemical reaction Methods 0.000 claims 3
- 239000004020 conductor Substances 0.000 claims 3
- 101710028361 MARVELD2 Proteins 0.000 claims 1
- VWDWKYIASSYTQR-UHFFFAOYSA-N Sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims 1
- 239000003990 capacitor Substances 0.000 claims 1
- 230000000717 retained Effects 0.000 claims 1
- 230000001808 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
Abstract
An extended delay detonator assembly (1) provides a pre-selected, electronically controlled delay between an incoming non-electric impulse input signal from, e.g., a shock tube (10) or other input transmission line, and detonation of the output charge (44) the energy from which may be used to set off a blasting charge or to transfer the signal to another signal transmission line such as output shock tube (216). In another embodiment, the delay detonator is disposed in a housing (12) closed at one end and opened at the other end for coupling to the input transmission line (10), the signal from which may be amplified by a booster charge (20) mounted within the housing (12). A piezoelectric generator (30) converts the optionally amplified impulse input signal to electrical output energy. A battery-powered programmable electric delay circuit such as that contained in digital delay module (232) is activated by the electrical output from piezoelectric generator (30), counts the pre-selected delay period, at the end thereof ignites an electrically operable output charge (44).
Claims
AMENDED CLAIMS
[received by the International Bureau on 6 July 1994 (06.07.94); original claims 1, 3, 5-10, 16 and 27 amended; original claim 2 cancelled; remaining claims unchanged (4 pages)]
1. An electrical delay unit for use in blasting initia¬ tion systems energized by a non-electric impulse signal com¬ prises a housing means having one end thereof dimensioned and configured to be coupled to an input transmission line capable of transmitting a non-electric impulse input signal has: (i) a signal conversion means disposed in signal-com¬ municating relationship to the transmission line for receiv¬ ing a non-electric input impulse signal from the transmis¬ sion line and converting the impulse signal to an electrical output signal; (ii) an electric circuit including delay means having an output conductor means, the electric circuit being connected to the signal conversion means to receive therefrom the electrical output signal and thereupon to start counting a selected time interval and, upon lapse of the time interval, to transmit the electrical output signal to the output conductor means; the electric circuit further including a battery means connected thereto to supply power for counting the selected time interval independently of the electrical output signal; (iii) an electrically operable ig¬ niter means connected to the output conductor means of the electric circuit and to an output charge; the igniter means being energized to detonate the output charge upon receipt of the electrical output signal from the electric circuit.
2. CANCELED
3. The delay unit of. claim 1 wherein the power output of the battery means is insufficient to energize the igniter means sufficiently to detonate the output charge.
4. The delay unit of claim 1 wherein the electric cir¬ cuit comprises means to convert the electrical output signal to a first signal which starts the counting of the time in¬ terval and a second signal which energizes the igniter means at the end of the time interval.
5. The delay unit of claim 1 including an input trans¬ mission line coupled thereto.
6. The delay unit of claim 1 wherein the electric cir¬ cuit comprises an oscillator for generating cycles connected to the battery means to receive power therefrom for generat¬ ing cycles, a counter connected to the oscillator for count¬ ing the cycles, and means for preloading the counter with an initial value.
7. The delay unit of claim 1 wherein the signal conver¬ sion means comprises (a) a transducer for converting the im¬ pulse input signal to electrical energy and (b) an energy storage means connected to the transducer to receive there¬ from and store electrical energy for release from the energy storage means as the electrical output signal and the elec¬ tric circuit comprises (c) an oscillator for generating cy¬ cles connected to the battery means to receive power there¬ from for counting the cycles, (d) a counter connected to the oscillator, and (e) means for preloading the counter with an initial value.
8. The delay unit of claim 1 comprising a delay detona¬ tor and wherein the housing means comprises a tubular, elec¬ trically conductive body closed at the end thereof opposite the one. end and wherein items (i), (ϋ) and (iii) of claim 1 are enclosed within the housing.
9. The delay unit of claim 1 including a booster charge disposed within the housing and positioned to be detonated by the impulse input signal received from the input trans¬ mission line to amplify the impulse input signal received by the signal conversion means.
10. The delay unit of claim 1 wherein the signal con¬ version means comprises (a) a transducer for converting the impulse input signal to electrical energy and (b) an energy storage means connected to the transducer to receive there¬ from and store electrical energy for release from the energy storage means as the electrical output signal.
11. The delay unit of claim 10 wherein the transducer comprises a piezoelectric generator and the energy storage means comprises a storage capacitor.
12. The delay unit of claim 10 including an input transmission line coupled thereto.
13. The delay unit of claim 12 wherein the input trans¬ mission line comprises an input transmission tube.
14. The delay unit of claim 12 wherein the input trans¬ mission tube comprises a shock tube.
15. The delay unit of claim 12 wherein the input trans¬ mission line comprises a low energy detonating cord.
16. The delay unit of claim 1 wherein the housing means comprises one or more output line retainer means for retain¬ ing one or more output transmission lines in proximity to the output charge whereby detonation of the output charge can ignite one or more output transmission lines disposed therein.
24. The delay unit of claim 23 further including one or more output transmission lines retained by the output line retainer means.
25. The delay unit of claim 23 wherein the one or more output transmission lines comprise an output transmission tube.
26. The delay unit of claim 25 wherein the transmission tubes comprise shock tubes.
27. A method for interposing a time delay between the application of a non-electric impulse input signal received from an input transmission line and the detonation of an output charge, comprising the steps of:
(a) converting the non-electric input impulse signal to a first electric signal;
(b) transmitting the first electric signal to an os¬ cillator;
(c) counting the number of cycles generated by the oscillator in response to the first electric signal by em¬ ploying an electronic timer;
(d) generating a second electric signal upon the completion of a preprogrammed count of the number of cycles;
(e) transmitting the second electric signal to an electrically operable output charge to detonate the output charge; and
(f) supplying power to carry out the counting of step (c) independently of the first electric signal.
28. The method of claim 27 wherein the electronic timer is powered by a battery means.
29. The method of claim 27 or claim 28 further compris¬ ing igniting one or more output transmission lines with the energy generated by the. output charge to emit one or more output signals.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP94913871A EP0677164B1 (en) | 1992-12-22 | 1993-12-17 | Digital delay unit |
| AU65858/94A AU677391B2 (en) | 1992-12-22 | 1993-12-17 | Digital delay unit |
| ES94913871T ES2150491T3 (en) | 1992-12-22 | 1993-12-17 | NUMERICAL TIMING UNIT. |
| DE69329155T DE69329155T2 (en) | 1992-12-22 | 1993-12-17 | DIGITAL DELAY UNIT |
| BR9307715-7A BR9307715A (en) | 1992-12-22 | 1993-12-17 | Digital return unit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/994,676 | 1992-12-22 | ||
| US07/994,676 US5435248A (en) | 1991-07-09 | 1992-12-22 | Extended range digital delay detonator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1994015169A1 WO1994015169A1 (en) | 1994-07-07 |
| WO1994015169B1 true WO1994015169B1 (en) | 1994-08-18 |
Family
ID=25540922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1993/012319 WO1994015169A1 (en) | 1992-12-22 | 1993-12-17 | Digital delay unit |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5435248A (en) |
| EP (1) | EP0677164B1 (en) |
| JP (1) | JP2845348B2 (en) |
| AU (1) | AU677391B2 (en) |
| BR (2) | BR9307715A (en) |
| CA (1) | CA2151911C (en) |
| DE (1) | DE69329155T2 (en) |
| ES (1) | ES2150491T3 (en) |
| WO (1) | WO1994015169A1 (en) |
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-
1992
- 1992-12-22 US US07/994,676 patent/US5435248A/en not_active Expired - Lifetime
-
1993
- 1993-12-17 ES ES94913871T patent/ES2150491T3/en not_active Expired - Lifetime
- 1993-12-17 JP JP6515319A patent/JP2845348B2/en not_active Expired - Fee Related
- 1993-12-17 AU AU65858/94A patent/AU677391B2/en not_active Expired
- 1993-12-17 BR BR9307715-7A patent/BR9307715A/en not_active IP Right Cessation
- 1993-12-17 EP EP94913871A patent/EP0677164B1/en not_active Expired - Lifetime
- 1993-12-17 WO PCT/US1993/012319 patent/WO1994015169A1/en active IP Right Grant
- 1993-12-17 CA CA002151911A patent/CA2151911C/en not_active Expired - Lifetime
- 1993-12-17 DE DE69329155T patent/DE69329155T2/en not_active Expired - Fee Related
- 1993-12-22 BR BR9305208A patent/BR9305208A/en not_active IP Right Cessation
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