Invention Grant
US07649356B2 Pulse induction metal detector having high energy efficiency and sensitivity 有权
具有高能量和灵敏度的脉冲感应金属探测器

  • Patent Title: Pulse induction metal detector having high energy efficiency and sensitivity
  • Patent Title (中): 具有高能量和灵敏度的脉冲感应金属探测器
  • Application No.: US10323966
    Application Date: 2002-12-18
  • Publication No.: US07649356B2
    Publication Date: 2010-01-19
  • Inventor: John L. Earle
  • Applicant: John L. Earle
  • Applicant Address: US OR Sweet Home
  • Assignee: White's Electronics, Inc.
  • Current Assignee: White's Electronics, Inc.
  • Current Assignee Address: US OR Sweet Home
  • Agent James Creighton Wray; Meera P. Narasimhan
  • Main IPC: G01V3/00
  • IPC: G01V3/00 G01V3/08 G01R19/00
Pulse induction metal detector having high energy efficiency and sensitivity
Abstract:
A pulse induction metal detector having high efficiency and sensitivity. Within the scope of the invention is a high efficiency hand-held metal detector for detecting a metal object, comprising a coil and a source of current flow in the coil. The source is adapted to produce one or more pulses of current in the coil. Preferably, at least two of the pulses are spaced apart in time at least about 20 microseconds during which current flow in the coil is substantially constant. The metal detector also comprises a detecting circuit for detecting a response to the current pulses, and a sampling circuit for sampling the response at predetermined times at least during the time of one of the pulses.
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