流体スチフネスによる共振形圧力電気変換器
スポンサーリンク
概要
- 論文の詳細を見る
A novel electromechanical pressure transducer is proposed. Essentially, as shown in Fig. 1, it operates using the acoustical resonance due to the stiffness of a fluid in cavities and the mass of a vibrating body. This transducer is suited for application to telemetering systems because: (1) The absolute pressure, not the pressure difference, is transformed into an electrical signal. No parts of the transducer support any difference of static pressure. Therefore, error due to creep is avoidable. (2) The output signal is the frequency, not the amplitude. Pressure is transformed directly into a high-power ac signal by a simple electrical circuit. This paper includes the operation analysis of this transducer, an experimental check of its operation and the trial construction of a rather practical model. The input-output relation of this transducer, shown in Fig. 2, is given by Eq. (8) where k_V_0 is the stiffness of the cavity at pressure P=P_0. The symbols k_e and k_<ee> are the elastic support stiffness related to two respective deformation modes shown in Fig. 3. When the condition given by Eq. (10) or (12) occurs, Eq. (8) is reduced to the approximate Eq. (11) or (13). A novel electromechanical transducer having no biasing magnet is utilized in the first experimental model shown in Fig. 6. There are no large attractive forces and no fragile voice coils. Fig. 8 shows the oscillatory circuit using the first model. The input-output relation of this circuit is shown in Fig. 10, which satisfies Eq. (11). A rather practical small model was constructed using two elastic support thicknesses, 15μm and 6μm. The input-output relation of this model is shown in Fig. 12, which fits Eq. (13), because the smaller support size causes greater stiffnesses k_e and k_<ee>. The dependence of the output period of this model on temperature is shown in Fig. 13. This effect can be compensated for, just as with conventional strain-gauge type pressure transducers.
- 社団法人日本音響学会の論文
- 1975-11-01
著者
関連論文
- 小型スピーカにおける動的歪と高調波歪の関係とその解析
- マイクロホン小史 : 民生用途のマイクロホンを中心に(マイクロホン開発における各種技術分野の動向)
- ディジタルオーディオにおける時間ゆらぎ検知閾
- 第1部-分野別の流れ- 電気音響分野
- 筐体を振動体として用いる圧電形受話器
- 長岡技術科学大学の音響実験施設 (<特集>最近の各方面の音響設備)
- 動作減衰量に着目した各種電気音響変換器の比較
- 流体スチフネスによる共振形圧力電気変換器
- Kirchhoff-Huygens積分式による音場効果計算の誤差とその補正
- バフルの音場効果計算への Kirchhoff-Huygens 積分式の適用における誤差とその補正
- 不等間隔配列形指向性音源の一設計法
- 多重共振系の周波数特性の制御に関するモデル的考察
- 周波数変調方式を用いた微少変位測定法の検討