音響記録データ圧縮アルゴリズムのDSPおよびFPGAプラットフォームの実装

Hang Hui^1,2, Xiaolong Hao^1,2, Fan Bai^1,2

¹Downhole Measurement and Control Laboratory of National Engineering Laboratory of Oil and Gas Drilling Technology, Xi'an 710065, China.

The Review of scientific instruments

|September 2, 2025

まとめ

波形変換を用いたダウンホールデータの圧縮は,遠隔検出の音響記録を大幅に改善します. この方法は,最小の歪みで50%の圧縮比を達成し,データ伝送とログの効率を高めます.

科学分野:

地理学
シグナル処理
データ圧縮

背景:

リモート検出の音響ログは,リアルタイムでデータアップロードし,迅速なログに挑戦しています.
ダウンホールデータ圧縮は,これらの制限を克服するための重要な戦略です.

研究の目的:

音響記録データのための波形変換ベースのデータ圧縮方法を体系的に分析する.
この圧縮アルゴリズムを実装するためのハードウェアプラットフォーム (DSPとFPGA) の開発と評価.

主な方法:

DSPとFPGAのハードウェアプラットフォームでウェーブレット変換ベースのデータ圧縮アルゴリズムを開発し実行しました.
解圧アルゴリズムをホストコンピュータに実装した.
圧縮比,歪み,実行時間に焦点を当てた実際の音響記録データを用いて性能を評価した.

主要な成果:

信号の形状と波の抽出に最小限の影響を及ぼす約50%の圧縮比を達成しました.
アルゴリズムは,圧縮比と歪みに関して,特定のハードウェアプラットフォーム (DSP vs. FPGA) との最小の関係を示しました.
FPGAの実装は,DSP (ミリ秒) よりも著しく速く (42 μs) で,メモリも少ない.

結論:

波形変換ベースのデータ圧縮は,重要な波形情報を保存して,遠隔検出の音響記録に有効です.
FPGAは,DSPと比較してリアルタイム処理に優れた性能を提供します.
このアプローチは,ログの効率を高め,コントローラーの作業量を軽減し,将来のツール設計のための参照を提供します.

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