WO1997021067B1 - Electronic explosives initiating device - Google Patents
Electronic explosives initiating deviceInfo
- Publication number
- WO1997021067B1 WO1997021067B1 PCT/GB1996/002987 GB9602987W WO9721067B1 WO 1997021067 B1 WO1997021067 B1 WO 1997021067B1 GB 9602987 W GB9602987 W GB 9602987W WO 9721067 B1 WO9721067 B1 WO 9721067B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- designed
- fire
- devices
- operating circuit
- Prior art date
Links
- 230000000977 initiatory Effects 0.000 title claims abstract 11
- 239000002360 explosive Substances 0.000 title claims abstract 9
- 238000010304 firing Methods 0.000 claims abstract 20
- 238000005422 blasting Methods 0.000 claims 13
- 230000001934 delay Effects 0.000 claims 2
- 230000002950 deficient Effects 0.000 claims 1
- 238000010998 test method Methods 0.000 claims 1
Abstract
An electronic explosives initiating device which includes a firing element which has a designed no-fire voltage and an operating circuit which operates at any voltage in a range of voltages which straddles the designed no-fire voltage.
Claims
AMENDED CLAIMS
[received by the International Bureau on 4 July 1 97 (04.07.97); original claims 1-22 replaced by amended claims 1-26 (5 pages)]
1 An electronic explosives initiating device which includes a bi-directional communication circuit, a firing element which is designed to be fired by a firing signal with a voltage which is greater than a designed no-fire voltage, and an operating circuit which is responsive to a firing signal at any voltage in a first range of voltages which straddles the designed no-fire voltage.
2 A device according to claim 1 wherein the designed no- fire voltage is verified by testing one or more samples taken from a batch of electronic explosives initiating devices which are designed to be substantially the same.
3 A device according to claim 2 which is tested with a firing signal at a voltage which is less than the designed no-fire voltage.
4 A device according to claim 4 wherein the bi¬ directional communication circuit operates at any voltage in a second range of voltages which straddles the designed no- fire voltage.
5 A device according to any one of claims 1 to 4 wherein the operating circuit, when connected to an operating voltage which is in the said first range and which is below the designed no-fire voltage, is in a linked state in which identity data, pertaining to the device and stored in the operating circuit, can be logged.
6 A device according to claim 5 which has a label which displays a number or code which corresponds to or which is based on the identity data.
7 A device according to claim 5 or 6 wherein the operating circuit, when connected to the operating voltage, is responsive to an externally applied control signal by means of which the operating circuit can be switched to an unlinked state.
8 A device according to any one of claims 1 to 4 which includes storage means for a unique identification code associated with the device and terminals which are connectable to a trunkline, the operating circuit being switchable to a first state, in which bi-directional communication can take place over the trunkline, upon receiving a first state-change signal, accompanied by the unique identification code, on the trunkline, and being switchable to a second state, in which the operating circuit is only responsive to a message on the trunkline under fault conditions, upon receiving a second state-change signal on the trunkline.
9 A device according to claim 8 wherein the operating circuit is switchable to the first state if the terminals are connected to the trunkline while a predetermined voltage is present on the trunkline or, while the terminals are connected to the trunkline, if the voltage on the trunkline is reduced below a predetermined level, and the said predetermined voltage is then applied to the trunkline.
10 A device according to any one of claims 1 to 9 wherein the firing element is a bridge and one or more links which are physically less robust than the bridge are positioned adjacent the bridge and are monitored for mechanical damage.
11 A device according to claim 10 wherein the operating circuit includes means for monitoring the link or links and
1 9
for renαering the ondge inoperative f mechanical damage to the link or links is detected.
12 A αevice according to any one of claims 1 to 11 wherein the operating circuit includes means for sensing the polarity of any electrical connection made to the device and for resolving the polarity of the connection.
13 A device according to any one of claims 1 to 12 which includes a sensing circuit which monitors a voltage applied to the device and which generates a warning signal if the voltage exceeds a pre-determined level.
14 A device according to any one of claims 1 to 13 which includes means for clamping a voltage which is applied to the device to a level below the designed no-fire voltage.
15 A blasting system which includes a plurality of devices, each device being according to claim 5, 6 or 7, and at least a first control unit to which the devices are connected and which is adapted to record at least the identity data of each αevice connected to it in a predetermined order.
16 A blasting system according to claim 15 wherein the first control unit is unable to produce a voltage which is greater than the designed no-fire voltage.
17 A blasting system according to claim 15 or 16 which includes a second control unit which is used to assign a respective time delay to each of the devices via the first control unit.
18 An electronic explosives initiating device which includes a bi-directional communication circuit and a firing element whicn has a designed no-fire voltage and which has
20
been tested at a confirmation no-fire voltage which is less than the designed no-fire voltage, the device further including an operating circuit which is responsive to a firing signal at any voltage in a range of voltages which straddles the designed no-fire voltage, and memory means in which identity data, pertaining to the device, is stored, the operating circuit, when connected to an operating voltage which is in the said range and which is below the designed no-fire voltage, being switched to a linked state in which the identity data can be accessed by external means.
19 A blasting system which includes a plurality of explosives initiating devices, each device including respective memory means in which identity data, pertaining to the device, is stored, and a respective operating circuit, control means, and connecting means, leading from the control means, to which each of the devices is separately connectable, the control means including test means for indicating the integrity of the connection of each device to the connecting means, when the connection is made, and storage means for storing the identity data from each device and the sequence in which the devices are connected to the connecting means.
20 A blasting system according to claim 19 wherein the operating circuit of each device, when the device is connected to the connecting means, is placed in a linked state which allows the identity data in the memory means to be accessed by the control means.
21 A blasting system according to claim 19 or 20 wherein the storage means includes means for storing positional information relating to each respective device.
2 1
22 A blasting system according to claim 19, 20 or 21 wherein the control means includes means for assigning time delays to each respective device.
23 A method of establishing a blasting system which includes the steps of connecting a plurality of explosives initiating devices, at respective chosen positions, to connecting means extending from control means, testing the integrity of each connection at the time the connection is made, storing in the control means identity data pertaining to each respective device and the sequence in which the devices are connected to the connecting means, and using the control means to assign predetermined time delays to the respective devices.
24 A method according to claim 23 which includes the step of storing positional information, relating to each respective device, in the control means.
25 A method of testing and using an electronic explosives initiating device which includes a firing element which is designed to be fired by a firing signal with a voltage which is greater than a designed no-fire voltage, the method including the steps of testing the integrity of the firing element by applying a firing signal which has a voltage which is lower than the designed no-fire voltage and, if the integrity of the firing element is satisfactory, incorporating the device in a blasting system in which the device is fired by a firing signal with a voltage which is greater than the designed no-fire voltage.
26 A method according to claim 25 which initially includes the step of verifying the designed no-fire voltage by testing at least one sample device taken from a batch of electronic explosives initiating devices which are designed to be substantially the same,
22
STATEMENT UNDER ARTICLE 19
The amended claims are intended to distinguish from the prior art cited by emphasising the following aspects of the invention. The firing element in the device is designed to be fired by a firing signal which has a voltage which is greater than a designed no-fire voltage. The operating circuit is responsive to a firing signal which may be at any voltage in a range of voltages which straddles the designed no-fire voltage. Thus the initiating device may be given valid arming and firing commands at a voltage level which is below the designed no-fire voltage and it is able to execute these commands. Upon executing these commands an initiating device which does not conform to the minimum design criteria will fire and thereby destroy itself. This type of testing is undertaken under factory conditions. It will be understood that each device is pre-tested under control conditions to eliminate those devices which have defective firing elements. Only those devices which pass the integrity test are incorporated in a blasting system. When the device is installed in a blasting system it is given valid arming and firing commands at a voltage level which is above the designed no-fire voltage. When the devices are connected to a trunkline in the blasting system the connection is done while a voltage is impressed on the trunkline. This voltage is below the designed no-fire voltage and due to prior testing the devices can be connected under "live" conditions to the blasting system.
23
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002241231A CA2241231C (en) | 1995-12-06 | 1996-12-04 | Electronic explosives initiating device |
| DE69615709T DE69615709T3 (en) | 1995-12-06 | 1996-12-04 | ELECTRONIC IGNITION DEVICE FOR EXPLOSIVES |
| EP96941118A EP0879393B2 (en) | 1995-12-06 | 1996-12-04 | Electronic explosives initiating device |
| KR1019980704257A KR19990071967A (en) | 1995-12-06 | 1996-12-04 | Electronic explosion starter |
| JP9521078A JP2000501496A (en) | 1995-12-06 | 1996-12-04 | Electronic detonator |
| AU10368/97A AU714098B2 (en) | 1995-12-06 | 1996-12-04 | Electronic explosives initiating device |
| NZ323428A NZ323428A (en) | 1995-12-06 | 1996-12-04 | Electronic detonator with bi-directional communication circuit |
| US09/091,013 US6085659A (en) | 1995-12-06 | 1996-12-04 | Electronic explosives initiating device |
| APAP/P/1998/001273A AP1036A (en) | 1995-12-06 | 1996-12-04 | Electronic explosives initiating device. |
| DE19681674T DE19681674T1 (en) | 1995-12-06 | 1996-12-04 | Electronic explosive device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA9510349 | 1995-12-06 | ||
| ZA95/10349 | 1995-12-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1997021067A1 WO1997021067A1 (en) | 1997-06-12 |
| WO1997021067B1 true WO1997021067B1 (en) | 1997-08-14 |
Family
ID=25585452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB1996/002987 WO1997021067A1 (en) | 1995-12-06 | 1996-12-04 | Electronic explosives initiating device |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US6085659A (en) |
| EP (1) | EP0879393B2 (en) |
| JP (1) | JP2000501496A (en) |
| KR (1) | KR19990071967A (en) |
| CN (1) | CN1074830C (en) |
| AP (1) | AP1036A (en) |
| AU (1) | AU714098B2 (en) |
| CA (1) | CA2241231C (en) |
| DE (2) | DE69615709T3 (en) |
| ES (1) | ES2164931T3 (en) |
| NZ (1) | NZ323428A (en) |
| TW (1) | TW333606B (en) |
| WO (1) | WO1997021067A1 (en) |
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- 1996-12-04 WO PCT/GB1996/002987 patent/WO1997021067A1/en not_active Application Discontinuation
- 1996-12-04 AP APAP/P/1998/001273A patent/AP1036A/en active
- 1996-12-04 CN CN96198901A patent/CN1074830C/en not_active Expired - Lifetime
- 1996-12-04 TW TW085114956A patent/TW333606B/en active
- 1996-12-04 KR KR1019980704257A patent/KR19990071967A/en not_active Application Discontinuation
- 1996-12-04 JP JP9521078A patent/JP2000501496A/en active Pending
- 1996-12-04 NZ NZ323428A patent/NZ323428A/en not_active IP Right Cessation
- 1996-12-04 DE DE69615709T patent/DE69615709T3/en not_active Expired - Lifetime
- 1996-12-04 DE DE19681674T patent/DE19681674T1/en not_active Withdrawn
- 1996-12-04 EP EP96941118A patent/EP0879393B2/en not_active Expired - Lifetime
- 1996-12-04 AU AU10368/97A patent/AU714098B2/en not_active Expired
- 1996-12-04 US US09/091,013 patent/US6085659A/en not_active Expired - Lifetime
- 1996-12-04 CA CA002241231A patent/CA2241231C/en not_active Expired - Lifetime
- 1996-12-04 ES ES96941118T patent/ES2164931T3/en not_active Expired - Lifetime
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