Acoustic transmitting transducer apparatus
阅读：697发布：2023-07-29
专利汇可以提供Acoustic transmitting transducer apparatus专利检索，专利查询，专利分析的服务。并且An illustrative embodiment of the present invention includes acoustic transmitting transducer apparatus for use in well borehole logging which provides a sharper, more intense pulse of acoustic energy than heretofore possible while at the same time eliminating undesirable electric fields in the vicinity of the transducer element. Novel circuit means including remote mounted charge storage means, switching means, voltage transforming means and isolation circuitry together with mechanical end clamping are combined to produce this result.，下面是Acoustic transmitting transducer apparatus专利的具体信息内容。
1. Apparatus for generating acoustic energy in a well borehole comprising: an acoustic transducer element having two terminal connections; voltage transforming means having a primary and a secondary, the secondary being connected across the terminal connections of said transducer element; electrical energy storage means coupled to said primary of said voltage transforming means; means for discharging said energy storage means through said voltage transforming means thereby to apply high voltage across the transducer element; and means electrically coupled between said transducer element and said voltage transforming means for damping oscillations following the application of the high voltage across said transducer element.
2. The apparatus of claim 1 wherein said transducer element comprises a piezoelectric element.
3. The apparatus of claim 1 wherein said damping means comprises a unidirectional current conduction device.
4. The apparatus of claim 3 wherein said damping means further includes resistance means for damping the oscillations of said transducer element induced by the discharge of said energy storage means.
5. The apparatus of claim 1 wherein said voltage transforming means comprises an autotransformer.
6. The apparatus of claim 2 further including means for applying mechanical pressure against the ends of said piezoelectric element to increase the damping rate thereof.
7. Apparatus for generating acoustic energy in a well borehole comprising: a cylindriCal piezoelectric transducer element having two terminal connections and mounted with its ends clamped under a mechanical pressure; voltage transforming means having a primary and a secondary, the secondary being connected across the terminals of said transducer element; capacitive electrical storage means coupled to said primary of said voltage transforming means, means for discharging said energy storage means through said voltage transforming means thereby to apply a high voltage across the transducer element; and means electrically coupled between said transducer element and said voltage transforming means for damping oscillations following the application of the high voltage across said transducer element.
8. The apparatus of claim 7 wherein said damping means includes resistance means for damping the oscillations of said transducer element induced by the discharge of said energy storage means.
9. Apparatus for generating acoustic energy in a well bore comprising: an acoustic transducer element having two terminal connections; voltage transforming means having a primary and a secondary, the secondary being connected across the terminal connections of said transducer element; electrical energy storage means coupled to said primary of said voltage transforming means for supplying, upon discharge, electrical energy to said voltage transforming means thereby to apply a high voltage across said transducer element; and means electrically coupled between said transducer element and said voltage transforming means for damping oscillations after the application of the voltage across said transducer element.
10. Borehole logging apparatus comprising: a housing sized for passage in a well bore; acoustic transducer means disposed intermediate the length of said housing and operative to transmit and receive acoustic energy; circuit means for energizing a transducer means to emit an acoustic impulse and including high voltage capacitive means; electrical logging means disposed above and below said acoustic transducer means on said housing for emitting and detecting electrical energy; and said capacitive means being disposed in said housing and remotely positioned relative to said impulse emitting transducer means, thereby to electrically shield the electrical charge on said capacitive means relative to said electrical logging means.
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