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Induction balance metal detector with inverse discrimination 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01V-003/10
출원번호 US-0587844 (1975-06-18)
발명자 / 주소
  • Hirschi Richard Edward (Sweet Home OR)
출원인 / 주소
  • White\s Electronics, Inc. (Sweet Home OR 02)
인용정보 피인용 횟수 : 48  인용 특허 : 0

초록

An induction balance metal detector is described which is capable of discriminating between different types of metal objects, such as bottle caps and coins, by amplitude discrimination of their corresponding receive signals. In addition, the detector is provided with a tuning control which is used t

대표청구항

An induction balance metal detector apparatus in which the improvement comprises: search head means including transmit coil means for producing an electromagnetic field in response to an electrical input signal, and receive coil means for producing received signals at the output of the receive coil

이 특허를 인용한 특허 (48)

  1. Van Kann, Frank Joachim; Winterflood, John, Actuatory and gravity gradiometer.
  2. Goodyear, Simon Wray; Collinge, Simon Edward James; Keene, Mark Nicholas, Apparatus for detecting ferromagnetic objects and screening people and equipment.
  3. Johnson Douglas L. (Lebanon OR), Balanced search loop for metal detector.
  4. Simon, Joseph S., Balancing circuit for a metal detector.
  5. Koroschetz, Helmut, Circuit arrangement and method for matching a demodulator.
  6. Lee, Jeong Jun, Combined loop type auto-mobile sensor using loop coil and parking information system the same.
  7. Crowley Christopher W., Device for selectively detecting metal objects.
  8. Sinclair Paul L. (Houston TX), Digital induction logging tool including means for compensating for phase shift errors.
  9. Cook Kenneth M. (456 E. Lincoln Ave. Palatine IL 60067) Hametta Alan W. (404 E. Marshall Arlington Heights IL 60004), Discriminating metal detector with compensation for ground minerals.
  10. Beling Thomas E. (Framingham MA) Spani Wayne M. (San Diego CA), Ferromagnetic object detector with comparison of signal maximums from a pair of detection coils.
  11. Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  12. Van Kann, Frank Joachim, Gravity gradiometer.
  13. Van Kann, Frank Joachim, Gravity gradiometer.
  14. Van Kann, Frank Joachim, Gravity gradiometer.
  15. Van Kann, Frank Joachim, Gravity gradiometer.
  16. Van Kann, Frank Joachim, Gravity gradiometer.
  17. Van Kann, Frank Joachim, Gravity gradiometer.
  18. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  19. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  20. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  21. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  22. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  23. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  24. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  25. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  26. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  27. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  28. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  29. Van Kann, Frank Joachim; Winterflood, John, Gravity gradiometer.
  30. Van Kann, Frank Joachim; Winterflood, John; Mann, Anthony Gordon, Gravity gradiometer.
  31. Ott Ellen ; Ott James H., Ground piercing metal detector having range, bearing and metal-type discrimination.
  32. Ellen Ott ; James H. Ott, Ground piercing metal detector method for detecting the location of a buried metal object.
  33. Clements Philip E. (Littleton CO), Hinged metal detection cover for a receptacle.
  34. Turner John E. (El Paso TX), Induction balance metal detector with ferrous and non-ferrous metal identification.
  35. Teichmann,Reinhard; Buck,Bernd; Schuetze,Joerg, Inductive proximity switch.
  36. Podhrasky Robert J. (Dallas TX), Low battery voltage indicator circuit for a metal detector.
  37. Gifford Jack D. (4943 W. Brown Glendale AZ 85302), Metal detector apparatus utilizing controlled phase response to reject ground effects and to discriminate between differ.
  38. Podhrasky Robert J. (Dallas TX), Metal detector circuit having automatic tuning with multiple rates.
  39. Podhrasky Robert J. (Dallas TX), Metal detector circuit with mode selection and automatic tuning.
  40. Parks Stephen I. (Derwood MD), Metal detector coil.
  41. Dykstra Donald W. (Forest Grove OR) Calvin Samuel E. (Forest Grove OR), Metal detector for locating objects with full sensitivity in the presence of distributed mineral material.
  42. Podhrasky Robert J. (Dallas TX), Metal detector having digital signal processing.
  43. Hyodo, Satoshi, Method for detecting metal foreign object on contactless power supply device, contactless power supply device, contactless power reception device, and contactless power supply system.
  44. Karbowski James P. (Philomath OR), Oscillator type metal detector with switch controlled fixed biasing.
  45. Garry L. Burton, Passive security device for detecting ferromagnetic objects.
  46. Pecori Peter M. (Alexandria VA), Portable buried object detection system with error reducing signal processing.
  47. Maher Anthony J. (Vermont South AUX), Search head for metal detectors.
  48. Karbowski James P. (Philomath OR), Transmitter-receiver loop buried metal object locator with switch controlled reference voltage.
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