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Ultrasonic pressure sensor and operation method thereof

A pressure sensor, ultrasonic technology, applied in the direction of fluid pressure measurement, instrumentation, measurement force, etc. using acoustic methods, which can solve problems affecting sensor performance, changes, and limited sensor capabilities.

Inactive Publication Date: 2011-06-01
周敢
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Additionally, changes in the application environment such as temperature and pressure can significantly alter the Fabry-Perot etalon properties and negatively affect sensor performance
Also, the high frequency response of this design is limited by the finite thickness of the etalon layer, and the sensor has limited ability to probe the geometry laterally

Method used

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  • Ultrasonic pressure sensor and operation method thereof
  • Ultrasonic pressure sensor and operation method thereof
  • Ultrasonic pressure sensor and operation method thereof

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Embodiment Construction

[0020] figure 1 A schematic diagram of one embodiment of an ultrasonic pressure sensor 100 constructed in accordance with the principles of the present invention is shown. The ultrasonic pressure sensor 100 employs a Michelson interferometer structure. Laser light from laser 101 passes through optical circulator 102 , beam splitter 104 and focusing lens 112 and is coupled into optical fiber 120 . Optical fiber 120 acts as a probe for ultrasonic pressure sensor 100 ; for this reason, optical fiber 120 is referred to herein as probe optical fiber 120 . Beam splitter 104 also splits a portion of the laser light and directs it through optical phase shifter 106 and reflects off mirror 108 . The distal end 124 of the detection fiber 120 has a reflective coating at its tip such that laser light reaching the distal end 124 is substantially reflected back. The two reflected beams of light from the mirror 108 and from the fiber distal end 124 travel back and are combined in the beam ...

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Abstract

The invention provides an ultrasonic pressure sensor and a method for detecting ultrasonic pressure. In one embodiment, the ultrasonic pressure sensor comprises an interferometer (1) and a photoelectric detector (2), wherein the interferometer is provided with a reference arm and a signal arm comprising a sensing optical fiber; the sensing optical fiber is provided with a reflective coating at the far end of the sensing optical fiber, and is configured as ultrasonic wave coupled close to the far end; the interferometer is configured for receiving laser and generating two output beams on the basis of the ultrasonic wave; and the photoelectric detector is coupled to the interferometer and configured for generating an electronic signal on the basis of the two output beams.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of U.S. Patent Application Serial No. 11 / 315,546, filed December 22, 2005, entitled "Image-Guided Laser Catheter," and is further based on an application filed by Zhou on February 28, 2007 US Provisional Patent Application Serial No. 60 / 891,986, entitled "Ultrasonic Sensor," both of which are commonly owned with the present application and are incorporated herein by reference. technical field [0003] The present invention relates generally to ultrasonic pressure sensors, and more particularly to ultrasonic pressure sensors and methods of operation thereof. Background technique [0004] Ultrasonic pressure sensors measure ultrasonic pressure and convert it into a voltage signal. These sensors are used in a wide variety of applications ranging from non-destructive testing of materials, marine biology, to medical imaging. In medical imaging, an ultrasound transducer emits high...

Claims

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Application Information

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IPC IPC(8): G01L1/25G01L11/06
Inventor 周敢
Owner 周敢
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