Wireless Blasting Primer Unit Using Magnetic Field Communication
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Solution Overview
Problem
Existing electronic blasting systems face challenges such as the need for physical connectors, line-of-sight requirements for wireless communication, and the sensitivity of detonators to electromagnetic interference, making them unsafe and inconvenient for use in certain environments like underground mining.
Innovation Solution
A through-rock wireless initiation system using a magnetic transmitting system to communicate with in-hole initiating apparatuses that contain no explosives, allowing for programmable timing and controlled burning without the need for physical connections or access to borehole collars, utilizing a light-sensitive explosive initiated by a light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional detonators are used for wireless initiation, then wireless communication capability is achieved, but sensitivity to electromagnetic interference and safety risks increase
Solution Approach 1:
The patent extracts the explosive function from the communication device by using a separate light-sensitive explosive component that is initiated by light rather than electromagnetic signals. The initiating apparatus contains no explosives, separating the wireless communication function from the explosive initiation function, thereby eliminating electromagnetic interference sensitivity while maintaining wireless initiation capability.
2Reliability
If physical connectors like det cord or electrical cables are used, then reliable connection is achieved, but complexity and safety risks in complicated applications increase
Solution Approach 1:
The patent replaces the mechanical and electrical connector systems with a wireless optical communication system. The initiating apparatus uses magnetic field communication to transmit initiation commands wirelessly to the explosive train, eliminating the need for physical connectors, cables, or det cord, thereby reducing device complexity while maintaining initiation reliability.
3Reliability
If line-of-sight radio frequency communication is used, then communication reliability is improved, but applicability in underground mining and obstructed environments deteriorates
Solution Approach 1:
The patent uses magnetic fields as an intermediary medium for communication that can penetrate rock and earth materials. The initiating apparatus generates magnetic fields that propagate through the ground to reach the explosive train, eliminating the line-of-sight requirement and enabling operation in underground mining and other obstructed environments where traditional radio frequency communication would fail.
4Object-affected harmful factors
If detonators with electromagnetic protection are used, then electromagnetic interference resistance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent extracts the electromagnetic sensitivity problem entirely from the system by using a light-based initiation mechanism rather than electromagnetic-based detonators. The light-sensitive explosive is initiated by optical signals from an LED or laser, which are not susceptible to electromagnetic interference, thereby eliminating the need for expensive electromagnetic protection and simplifying manufacturing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system simplifies electronic blasting, enhances safety by eliminating explosive components, and allows for reliable initiation without line-of-sight requirements, reducing complexity and cost while ensuring safe handling and storage.
Implementation Method 1
A magnetic transmitting system may be used to communicate initiation commands to a receiver device in a borehole
Implementation Method 2
A light source may be used to direct a beam of light through a transparent window to initiate a light-sensitive explosive
Data Source
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AI summary
An initiator apparatus (IA) for blasting, the apparatus including: a magnetic receiver for receiving a magnetic communication signal through the ground by detection of a magnetic field; a controller, in electrical communication with the magnetic receiver, for processing the magnetic communication signal to determine a command for blasting; and a light source in electrical communication with the controller for generating a light beam to initiate a light-sensitive explosive (LSE) in accordance with the command.