Spark Discharge Detection Using Waveform Extension Circuit
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Solution Overview
Problem
Existing spark discharge detection devices face challenges in accurately and efficiently detecting spark discharges in sliding energization mechanisms due to varying wear rates and unpredictable current flows, leading to increased costs from high-speed sampling requirements and storage needs.
Innovation Solution
A spark discharge detection device comprising a discharge detection unit, a waveform extension circuit, and a determination circuit that extends the discharge waveform in the time direction and determines discharge occurrence based on signal thresholds, allowing for accurate detection without high-cost, high-speed sampling components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-speed sampling is used to detect spark discharge accurately, then detection accuracy is improved, but device cost increases
Solution Approach 1:
The patent transforms the detection approach from the time dimension (high-speed sampling) to the amplitude dimension (waveform extension). By extending the amplitude of the detected waveform signal, the system can identify spark discharges using lower sampling rates, thus resolving the contradiction between detection accuracy and device cost.
2Productivity
If high-speed sampling is used to detect spark discharge, then detection speed is improved, but storage capacity requirements increase
Solution Approach 1:
The patent shifts the detection strategy from time-based high-speed sampling to amplitude-based waveform extension. This dimensional transformation reduces the data storage requirements while maintaining detection effectiveness, as the system processes fewer samples with enhanced amplitude characteristics rather than storing numerous high-speed samples.
3Reliability
If high-speed sampling is used, then early stage detection capability is improved, but electronic component cost increases
Solution Approach 1:
The patent applies preliminary signal processing through waveform extension before final detection. By pre-enhancing the amplitude of detected signals, the system enables reliable early-stage spark discharge detection using less expensive electronic components, rather than relying solely on high-speed sampling hardware.
Data Source
AI summary
A spark discharge detection device includes a discharge detector, a waveform extension circuit, and determination circuit. The discharge detector includes a metal electrode that detects discharge between an electrode and a sliding body that is in contact with and sliding surface of the electrode. The waveform extension circuit configured to extend a discharge waveform output from the discharge detector in a time direction. The determination circuit configured to determine that discharge has occurred in the sliding body when a signal value exceeds a first threshold and a time during which the signal value exceeds the first threshold is held for a time longer than a first time for the output of the waveform extension circuit.