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Apparatus and methods for time domain reflectometry

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01R-027/04
출원번호 US-0335101 (1994-11-17)
발명자 / 주소
  • Hook William R.,CAX
출원인 / 주소
  • Precision Moisture Instruments, Inc., CAX
대리인 / 주소
    Cassidy
인용정보 피인용 횟수 : 37  인용 특허 : 17

초록

Time Domain Reflectometry ("TDR") methods and apparatus for measuring propagation velocities of RF pulses to determine material liquid contents, moisture profiles, material levels and dielectric constants including: i) TDR probes and/or probe adaptors, including series averaging probes and multi-seg

대표청구항

[ I claim:] [1.] A probe for use with Time Domain Reflectometry apparatus of the type used to measure the moisture content of a material to be tested and employing an RF cable having first and second conductors for coupling said probe to the Time Domain Reflectometry apparatus, said probe comprising

이 특허에 인용된 특허 (17)

  1. Ross Gerald F. (Lexington MA), Apparatus and method for sensing a liquid with a single wire transmission line.
  2. Wann Laymond D. (Ponca City OK), Apparatus for detecting and locating leakage in underwater structures.
  3. Falls Robert A. (Lorton VA), Apparatus for measuring the electromagnetic impedance of soils.
  4. Katz Allen (Trenton NJ), Composite amplifier with efficient power reduction.
  5. Menninga Gysbert L. (Highland Park IL), Electric overvoltage gas arrester with metallic shorting mechanism.
  6. Bastida Ezio M. (Milan ITX), Instrument for measuring moisture in materials.
  7. Cournane Thomas C. (4475 de Maisonneuve Blvd. W. Westmount ; PQ H3Z 1L8 CAX) McSweeney Cyril F. (4800 de Maisonneuve Blvd. W. ; #217 Westmount PQ H3Z 1M2 CAX), Level measurement for storage silos.
  8. Krake Guss L. (6939 Harriet Ave. S. Minneapolis MN 55423), Level measuring system.
  9. Mackay Neilson A. M. (40 Point Crescent Kingston ; Ontario CAX K7M 3P2) Beal John C. (2 Mowat Ave. Kingston ; Ontario CAX K7M 1K1), Measurement of soil moisture.
  10. Mohr Charles L. (1440 Agnes Richland WA 99352) Reich Frederick R. (Richland WA), Methods and apparatus for time domain reflectometry determination of relative proportion, fluid inventory and turbulence.
  11. Takeda Keizi (Asaka JPX) Matsumoto Kenji (Asaka JPX) Nagata Masayoshi (Asaka JPX), Photographic materials for non-silver images and process for forming non-silver images.
  12. Nash, Thomas F., Process for measuring the electrical properties of liquids and granular substances.
  13. Kwok Sai W. (El Paso TX), RF Trap for a cable television trunk amplifier station.
  14. Wrench ; Jr. ; Edwin H. ; Hicks ; Jay C. ; McCartney ; Joseph F., Range division multiplexing.
  15. Malicki Marek (Lublin PLX) Skierucha Wojciech (Lublin PLX), Reflectometric moisture meter for capillary-porous materials, especially for the soil.
  16. Hook William R. (Box 10 Shawnigan Lake ; British Columbia CAX V0R 2W0), Timing markers in time domain reflectometry systems.
  17. Brant ; Jr. Donald S. (South Brunswick Township ; Middlesex County NJ), Transmission line shorting switch.

이 특허를 인용한 특허 (37)

  1. Viera, Joseph Andrew; Williams, Heyward Sturges, Apparatus and method for assessing volumetric moisture content and controlling an irrigator.
  2. Corak, Steven J.; Hunter, James L.; Skaling, Whitney, Apparatus and method for monitoring drying of an agricultural porous medium such as grain or seed.
  3. Robichaud Peter R. ; Hungerford Roger D. ; Gasvoda David S., Apparatus and method for the measurement of forest duff moisture content.
  4. Hook William R.,CAX, Apparatus and methods for generating unambiguous large amplitude timing makers in time domain reflectometry systems for measuring propagation velocities of RF pulses to determine material liquid cont.
  5. Griessbaum, Karl; Fehrenbach, Josef; Motzer, Jurgen, Combination of a feedthrough element for an electric high-frequency signal and a probe, and a level meter metering device including a combination of this type.
  6. Jiang, Zhiping; Li, Ming; Zhang, Xi-Cheng, Differential time domain spectroscopy method for measuring thin film dielectric properties.
  7. McEwan, Thomas E., Direct PWM reflectometer.
  8. Wang,Zhiyong; Dias,Rajendra; Goyal,Deepak, Electro-optic time domain reflectometry.
  9. Liang, Hsien-Chuan; Li, Shen-Chun; Hsu, Shou-Kuo, Electronic device and method for correcting time-domain reflectometers.
  10. Nacson, Sabatino; Fradkin, Boris, Fault prediction in electronic transmission networks.
  11. Dahan, Ofer, Flexible probe for measuring moisture content in soil.
  12. Dahan,Ofer, Flexible probe for measuring moisture content in soil.
  13. Li Ming ; Zhang Xi-Cheng ; Cho Gyu Cheon, Free-space time-domain method for measuring thin film dielectric properties.
  14. Pattee,Jack; Zhukov,Mikhail S., High resolution time interval measurement apparatus and method.
  15. Guenther ; Jr. Edgar T. ; Larrick Ronald J., Low frequency suppression circuit for a time domain reflectometer.
  16. Diede Kurt C. ; Lovegren Eric R., Low power radar level instrument with enhanced diagnostics.
  17. Diede Kurt C., Low power radar level transmitter having reduced ground loop errors.
  18. Thomas E. McEwan, Material level sensor having a wire-horn launcher.
  19. Lovegren, Eric R.; Schumacher, Mark S.; Johnson, James A.; Diede, Kurt C., Measurement of concentration of material in a process fluid.
  20. Thurairajaratnam, Aritharan; Nagar, Mohan; Govind, Anand; Ghahghahi, Farshad, Measurement of package interconnect impedance using tester and supporting tester.
  21. Kurt C. Diede, Measurement of process product dielectric constant using a low power radar level transmitter.
  22. Morrison John L., Method and apparatus for monitoring the integrity of a geomembrane liner using time domain reflectometry.
  23. Needle David L. ; Shepard Stan F. ; Gin Gary, Method and apparatus for remotely changing signal characteristics of a signal generator.
  24. Robichaud Peter R. ; Hungerford Roger D. ; Gasvoda David S., Method for the measurement of forest duff moisture content.
  25. Diede Kurt C. ; Richter Brian E., Multiple process product interface detection for a low power radar level transmitter.
  26. Joshi Kalpana Keshav,INX, Process and instrument for moisture measurement.
  27. Martin, Robert J., Remote temperature sensing long wave length modulated focal plane array.
  28. Yankielun, Norbert E.; Zabilansky, Leonard, Scour detection and monitoring apparatus adapted for use in lossy soils and method of employment thereof.
  29. Dresselhaus, Daniel D.; O'Brien, Kevin G., Soil moisture sensor and controller.
  30. Dresselhaus, Daniel D.; O'Brien, Kevin G., Soil moisture sensor and controller.
  31. Nagar, Mohan R.; Thurairajaratnam, Aritharan, Substrate impedance measurement.
  32. Schultz,Roger L.; Skinner,Neal G.; Dagenais,Pete C.; De Jesus,Orlando, System and method for determining downhole conditions.
  33. Yankielun, Norbert E., System and method for remotely monitoring an interface between dissimilar materials.
  34. Lovegren, Eric R.; Diede, Kurt C.; Carlson, Ryan R., Threshold setting for a radar level transmitter.
  35. Woodhead, Ian Maxwell; Platt, Ian Gregory, Time domain reflectometry system and method of use.
  36. Park,Jin Bae; Shin,Yong June; Yook,Jong Gwan; Powers,Edward J.; Song,Eun Seok; Kim,Joo Won; Choe,Tok Son; Sung,Seung Hoon, Time-frequency domain reflectometry apparatus and method.
  37. Fouda, Ahmed Elsayed; Donderici, Burkay; Goodman, George David, Time-lapse time-domain reflectometry for tubing and formation monitoring.
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