Detnet South Africa (pty) Limited

Ael Mining Services Limited

Detnet South Africa Ltd

Detnet South Africa Proprietary Limited

Elmar Lennox Muller

Abraham Johannes Liebenberg

Andre Louis Koekemoer

Paul Dastoor

Warwick Belcher

Clifford Gordon Morgan

Pieter Stephanus Jacobus Halliday

Marius Christo Botha

Xiaojing Zhou

Glenn Bryant

Francois Venter

Tielman Christiaan Meyer

Christopher Malcolm Birkin

Craig Charles Schlenter

Albertus Abraham Labuschagne

Riaan Lingenfelder Van Wyk

Pieter Stephanus Halliday

Michiel Jacobus Kruger

Hendrik Cornelius Bezuidenhout

Trevor Watt

Ruan Smith

Tielman Christian Meyer

Chris Birkin

Christiaan Tielman Meyer

Pierre De Vos Mynhardt

Daniel August Julien Louis Maurissens

Pierre De Mynhardt

Shane Pheasant

Samir Kumar Mukhopadhyay

George Diederick Labuschagne

A blasting system which includes a blast site with a perimeter which surrounds the blast site, a plurality of spaced apart boreholes at the blast site, a plurality of detonator assemblies, each detonator assembly being positioned in a respective borehole, each detonator assembly including a respective receiver which is responsive to a magnetic signal transmitted from a control device and received by the receiver, a plurality of magnetic field strength meters (MFSMs) positioned at spaced apart locations on the perimeter, each MFSM including a respective unique identifier, each MFSM in response to a magnetic signal detected by the MFSM, producing a respective data signal which is dependent on the strength of the detected magnetic signal and which includes said unique identifier, and a communication arrangement for transmitting said data signals from said MFSMs to a data collection point.

Blasting system

Apparatus, for use in a wireless detonator system, which includes a portable housing, a bank of capacitors in the housing, first terminals for connection to selected capacitors to an antenna in the system, second terminals for connection to a transmitter, and a measurement and output arrangement which provides signals which indicate the integrity of such connections.

Apparatus for use in a wireless detonator system

A wireless detonator arrangement wherein an initiator is positioned between a power supply and a housing which contains an explosive and through which extends conductors which connect a signal processor to the power supply and to the initiator.

Wireless detonator arrangement

A wireless detonator initiating arrangement () which includes a first housing () which contains a receiver () and a signal processor (), a second housing () which contains an explosive (), a casing () which contains an initiator () which is responsive to the signal processor () to ignite the explosive () and a third housing () which contains a power source () to power the signal processor ().

Wireless initiating arrangement

A detonator assembly which includes a detonator arrangement comprising a detonator, a receiver which is responsive to a magnetic signal from a control centre and a control circuit which, in response to a signal from the receiver, regulates firing of the detonator, and which is characterised in that a fibre optic cable is connected to and extends from the detonator arrangement, and in that the detonator arrangement includes a transmitter/receiver module which is in signal communication with the fibre optic cable and the control circuit.

Detonator assembly

A safety arrangement for a wireless blasting system which includes a plurality of wireless detonator assemblies located at a blast zone wherein each route which provides access to the blast zone is monitored to detect removal of a wireless detonator assembly which is in an operative mode from the blast zone.

Safety arrangement for a wireless blasting system

A blasting system which is established using an autonomously controlled vehicle to traverse a blast site, moving from blast hole to blast hole and at each blast hole using robotic means to prepare each blast hole for detonation.

Method of and apparatus for establishing a blasting system

A wireless detonator system wherein a blast control unit communicates bidirectionally with at least one tagger and with detonators, prior to deployment thereof, using a NFC technique, and a transmitter/receiver assembly communicates with each detonator atan ultralow frequency.

Wireless detonator system

A wireless detonator assembly which includes a detonator, a receiver, a printed circuit board with a stored key which is hardwired onto the board during manufacture of the detonator assembly and control logic which allows the detonator to be fired only if the control logic extracts from a signal, received by the receiver, a reference key which is identical to the stored key.

Wireless detonator assembly

A spool for use in a blasting system which carries a coiled signal-transmitting conductor which is connected at one end to a detonator and at an opposed end to a connector.

Apparatus for use in a blasting system

A blasting system which includes control equipment and a plurality of detonators which are located in respective boreholes formed in rock, wherein signals from the detonators are magnetically transmitted wirelessly through the rock to the control equipment via different paths between successive detonators, and wherein a signal from the control equipment can be simultaneously transmitted to all of the detonators.

Bidirectional wireless detonator system

A shock tube for propagating and initiating a signal to an explosive charge which includes at least first and second elongate flexible conductors on a body of the detonator to enable two-way communication between the explosive charge and a blasting machine thereby to confirm the status of the detonator prior to sending a fire signal.

Conductive shock tube

A detonator for use in a detonating system, which detonator includes discriminating and validating arrangements which sense and validate at least one characteristic of at least one parameter produced by at least one of a light, acoustic, vibratory, magnetic or electrical signal event, and an electronic timer which executes a timing interval in response thereto.

Detonator

A sensor assembly for use in actuating an electronic detonator in response to a shock tube event propagated through a shock tube, the sensor assembly including support, and at least one sensor on a surface of the support, the support being configured to position the at least one sensor displaced laterally from a line of action of the shock tube event.

Detonator sensor assembly

A connector block for use with an electronic or electric detonator which includes a housing and, mounted in or to the housing, a power source, a radio receiver, a radio transmitter, a processor/logic unit and terminals for connection to at least one signal transmitting conductor.

Growing community of inventors

Centurion, South Africa

Elmar Lennox Muller