초록 ▼

A pressure and temperature transducer includes an elongate housing formed from double rotation cut crystal quartz, an elongate plate-like resonator formed from double rotation cut crystal quartz capable of vibrating under an applied electric field located within the housing, the resonator being form

A pressure and temperature transducer includes an elongate housing formed from double rotation cut crystal quartz, an elongate plate-like resonator formed from double rotation cut crystal quartz capable of vibrating under an applied electric field located within the housing, the resonator being formed in unitary construction with the housing. The long edges of the resonator are connected to the interior walls of the housing, and short edges of the resonator are free and extend across the interior of the housing in a substantially continuous curve. Electrodes are located on opposite faces of the resonator for applying an electric field which causes the resonator to vibrate. End caps, formed from double rotation cut crystal quartz, are provided at each end of the housing. A borehole tool includes a tool body which can be positioned in a borehole, a probe for sampling fluid in the borehole; and a pressure and/or temperature transducer, connected to the probe for making measurements on the fluid.

대표청구항 ▼

[ What is claimed is:] [1.] A transducer comprising:a) an elongate housing, the exterior of which can be exposed to a pressure to be measured; andb) an elongate plate-like resonator capable of vibrating under an applied electric field located within the housing and connected across interior walls, w

[ What is claimed is:] [1.] A transducer comprising:a) an elongate housing, the exterior of which can be exposed to a pressure to be measured; andb) an elongate plate-like resonator capable of vibrating under an applied electric field located within the housing and connected across interior walls, wherein long edges of the resonator are connected to the interior walls of the housing, and short edges of the resonator are free and extend across the interior of the housing in a substantially continuous curve.