Wireless Blasting Bridge Unit Command Verification
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Solution Overview
Problem
Conventional wireless blasting systems lack safety and controllability, as they can inadvertently fire detonators due to spurious noise or incorrect command interpretation, posing risks during remote operations.
Innovation Solution
Implementing a method where a wireless-enabled bridge unit sends multiple fire command messages to a blasting machine only after receiving proper acknowledgment, ensuring that the firing circuit is powered up only when a secure wireless link is established, and allowing for remote turn on/off and verification processes to prevent accidental detonations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single fire command message is sent from master controller to blasting machine, then the operation is simple and fast, but the system is vulnerable to spurious noise and accidental detonation
Solution Approach 1:
The system implements feedback by requiring the blasting machine to send an acknowledgment message back to the bridge unit after receiving the first fire command. The bridge unit only sends the second fire command if it receives this acknowledgment, creating a closed-loop control system that verifies proper command reception and system state before proceeding with detonation.
Solution Approach 2:
The system performs preliminary actions by sending the first fire command message followed by an acknowledgment exchange before the actual detonation occurs. This preliminary communication phase verifies the wireless link integrity and system readiness, ensuring that the second fire command (which triggers detonation) is sent only when conditions are confirmed safe.
2Speed
If the firing circuit is powered up continuously to ensure readiness, then the response time is fast, but the risk of accidental firing increases
Solution Approach 1:
The bridge unit performs preliminary actions by establishing the wireless link and exchanging acknowledgment messages before powering up the firing circuit. The system sends the first fire command and receives acknowledgment while the circuit remains unpowered, then only after verification does it enable power to the firing circuit, ensuring readiness without continuous power exposure.
3Object-affected harmful factors
If remote wireless control is implemented to improve operator safety, then the operator distance from blast site increases, but the controllability and verification capability decreases
Solution Approach 1:
The system maintains ease of operation despite remote control by implementing feedback through acknowledgment messages. The blasting machine sends acknowledgments back to the bridge unit, which relays them to the master controller, allowing the remote operator to verify each step of the process including command reception, arming status, and readiness confirmation.
Solution Approach 2:
The bridge unit acts as an intermediary between the remote master controller and the blasting machine. It receives wireless commands from the master controller, converts them to wired signals for the blasting machine, and relays acknowledgment messages back, enabling remote operation with full verification capability.
Data Source
Figure 1
Figure 2~3
Figure 4A
AI summary
Methods for wireless detonator blasting are presented.