Detonator Control Circuit Signal Transmission
Solution Overview
Problem
Existing detonator systems face challenges in reducing charge current and improving signal-to-noise ratio (SNR) during operation, especially when communicating with a blasting device, and in managing variations in reference current due to changes in the number of detonators.
Innovation Solution
A detonator system with a control circuit that receives a first signal from a blasting device, transmits a second signal using current, and includes a charging circuit that stops charging operations while transmitting signals, utilizing a charging switch and control switch to manage voltage and current flow, thereby reducing charging current and improving SNR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detonator continuously charges during signal transmission, then the charging operation maintains continuous power supply, but the charge current increases and signal-to-noise ratio deteriorates
Solution Approach 1:
The charging circuit operates periodically by alternating between charging mode and signal transmission mode. During signal transmission, the charging operation is suspended to eliminate current noise, then resumes after transmission completes. This periodic operation allows reliable communication while minimizing harmful charge current interference.
Solution Approach 2:
The system dynamically switches between different operational states (charging and signal transmission) based on real-time needs. The control circuit monitors transmission requirements and adjusts the charging circuit's operation accordingly, transitioning from continuous charging to intermittent charging that accommodates signal transmission demands.
2Adaptability or versatility
If multiple detonators are connected to the blasting device, then the system can control more explosive charges, but the reference current variation increases and communication becomes unstable
Solution Approach 1:
The control circuit in each detonator monitors the reference current and provides feedback to adjust charging operations. When multiple detonators are connected, the system detects current variations and dynamically adjusts individual charging rates to maintain stable communication signals, allowing expanded system capacity without sacrificing communication reliability.
Data Source
AI summary
A detonator includes a control circuit and a charging circuit. The control circuit receives a first signal transmitted using a voltage applied to a cable by a blasting device and transmits a second signal to the blasting device using a current flowing to the cable. The charging circuit performs a charging operation by receiving the voltage through the cable. The charging circuit stops the charging operation while the control circuit transmits the second signal to the blasting device.