- Patent Number:
6,970,087
- Appl. No:
10/626288
- Application Filed:
July 24, 2003
- نبذة مختصرة :
A metal detecting device for the detection of a metal object concealed in shoe or on a leg of a subject, including: a housing with a platform having an upper surface with indication areas thereon for the correct positioning of each of a subject's feet, left-foot and right-foot electromagnetic coils under the indication areas connected to a power supply via an oscillator and a switch, an electromagnetic shield divider between the left-foot and right-foot electromagnetic coils, a detection system for the detection of the placement of the subjects feet on the indication area, a processing unit for processing signals from the electromagnetic coils and detection system, and a display connected to the processing unit for displaying a warning signal if metal is detected.
- Inventors:
Stis, Gil (Ashdod, IL)
- Claim:
1. A metal detecting device for the detection of a metal object concealed in shoe or on a leg of a subject, comprising: a housing with a platform having an upper surface with indication areas thereon for the correct positioning of each of a subject's feet; left-foot and right-foot electromagnetic coils under the indication areas connected to a power supply via an oscillator and a switch; an electromagnetic shield divider between the left-foot and right-foot electromagnetic coils; a detection system for the detection of the placement of the subject's feet on the indication area; a processing unit for processing signals from the electromagnetic coils and detection system; and a display connected to the processing unit for displaying a warning signal if metal is detected.
- Claim:
2. A metal detecting device as claimed in claim 1 , wherein said power supply is a DC power source provided by a dedicated power pack.
- Claim:
3. A metal detecting device as claimed in claim 2 , wherein said power supply is rechargeable.
- Claim:
4. A metal detecting device as claimed in claim 1 , wherein said power supply is a mains power supply.
- Claim:
5. A metal detecting device as claimed in claim 1 , wherein said detection system for detection of the correct placement of the subject's feet comprising pairs of IR-LEDs and IR detectors.
- Claim:
6. A metal detecting device as claimed in claim 1 , further comprising two secondary metal detector coils per foot.
- Claim:
7. A method for detecting metal objects concealed in a shoe or on the lower part of a leg of a subject using a device as claimed in claim 1 , comprising the steps of: a. applying current to a first left-foot electromagnetic coil, and a first right-foot electromagnetic coil in turn for a short time period that is typically several milliseconds and recording eddy current signals therefrom; b. comparing signal from the first left-foot electromagnetic coil with signal from the first right-foot electromagnetic coil to eliminate effect of background interference; c. positively detecting the presence of a subject's legs, correctly positioned with respect to said indication on said platform via a detection system; d. comparing signal obtained from first left-foot electromagnetic coil with signal obtained from first right-foot electromagnetic coil when the presence of a correctly positioned subject's legs have been positively detected on said platform for differences; and e. displaying presence of any differences on said display.
- Claim:
8. A method for obtaining an indication of mass and position of a metal object connected to a leg of a subject using a system as claimed in claim 6 , comprising the steps of: a. applying current to a first left-foot electromagnetic coil, and a first right-foot electromagnetic coil in turn, for a short time period that is typically several milliseconds, and recording eddy current signals therefrom; b. comparing signal from the first left-foot electromagnetic coil with signal from the first right-foot electromagnetic coil to eliminate effect of background interference; c. positively detecting the presence of a subject's legs, correctly positioned with respect to said indication on said platform via a detection system; d. comparing signal obtained from first left-foot electromagnetic coil with signal obtained from first right-foot electromagnetic coil when the presence of a correctly positioned subject's legs have been positively detected on said platform for differences indicating presence of a metal object; e. comparing signal obtained from secondary left-foot electromagnetic coils with signal obtained from primary left-foot electromagnetic coil to obtain an indication of mass and position of a metal object situated on left leg; f. comparing signal obtained from secondary right-foot electromagnetic coils with signal obtained from primary right-foot electromagnetic coil to obtain an indication of mass and position of a metal object situated on right leg; and g. displaying details of any suspected metal objects on said display.
- Claim:
9. A method of assembling a metal detecting facility for detecting metal objects attached to the lower leg of a subject; said method comprising the steps of: a. enclosing a primary pair of horizontally aligned electromagnetic coils within a platform; b. connecting said pair of horizontally aligned electromagnetic coils via an oscillator and a switch, to a processor such that current is supplied to each of said pair of horizontally aligned electromagnetic coils in turn; c. indicating correct positioning of a subject's feet on upper surface of said platform; d. attaching a foot detection means to said platform for detection of feet on upper surface of said platform, and connecting said foot detection means to said processor; and e. coupling said processor to a display for indicating the detection of detected metal objects.
- Claim:
10. The method of claim 9 further comprising the step of attaching an electromagnetic damping screen in the vertical plane between said coils.
- Claim:
11. The method of claim 9 further comprising incorporating secondary pairs of electromagnetic coils aligned at an angle to said primary pairs of electromagnetic coils.
- Claim:
12. A method for detecting metal objects concealed in a shoe or on the lower part of a leg of a subject using a device as claimed in claim 2 , comprising the steps of: a. applying current to a first left-foot electromagnetic coil, and a first right-foot electromagnetic coil in turn for a short time period that is typically several milliseconds and recording eddy current signals therefrom; b. comparing signal from the first left-foot electromagnetic coil with signal from the first right-foot electromagnetic coil to eliminate effect of background interference; c. positively detecting the presence of a subject's legs, correctly positioned with respect to said indication on said platform via a detection system; d. comparing signal obtained from first left-foot electromagnetic coil with signal obtained from first right-foot electromagnetic coil when the presence of a correctly positioned subject's legs have been positively detected on said platform for differences; and e. displaying presence of any differences on said display.
- Claim:
13. A method for detecting metal objects concealed in a shoe or on the lower part of a leg of a subject using a device as claimed in claim 3 , comprising the steps of: a. applying current to a first left-foot electromagnetic coil, and a first right-foot electromagnetic coil in turn for a short time period that is typically several milliseconds and recording eddy current signals therefrom; b. comparing signal from the first left-foot electromagnetic coil with signal from the first right-foot electromagnetic coil to eliminate effect of background interference; c. positively detecting the presence of a subject's legs, correctly positioned with respect to said indication on said platform via a detection system; d. comparing signal obtained from first left-foot electromagnetic coil with signal obtained from first right-foot electromagnetic coil when the presence of a correctly positioned subject's legs have been positively detected on said platform for differences; and e. displaying presence of any differences on said display.
- Claim:
14. A method for detecting metal objects concealed in a shoe or on the lower part of a leg of a subject using a device as claimed in claim 4 , comprising the steps of: a. applying current to a first left-foot electromagnetic coil, and a first right-foot electromagnetic coil in turn for a short time period that is typically several milliseconds and recording eddy current signals therefrom; b. comparing signal from the first left-foot electromagnetic coil with signal from the first right-foot electromagnetic coil to eliminate effect of background interference; c. positively detecting the presence of a subject's legs, correctly positioned with respect to said indication on said platform via a detection system; d. comparing signal obtained from first left-foot electromagnetic coil with signal obtained from first right-foot electromagnetic coil when the presence of a correctly positioned subject's legs have been positively detected on said platform for differences; and e. displaying presence of any differences on said display.
- Claim:
15. A method for detecting metal objects concealed in a shoe or on the lower part of a leg of a subject using a device as claimed in claim 5 , comprising the steps of: a. applying current to a first left-foot electromagnetic coil, and a first right-foot electromagnetic coil in turn for a short time period that is typically several milliseconds and recording eddy current signals therefrom; b. comparing signal from the first left-foot electromagnetic coil with signal from the first right-foot electromagnetic coil to eliminate effect of background interference; c. positively detecting the presence of a subject's legs, correctly positioned with respect to said indication on said platform via a detection system; d. comparing signal obtained from first left-foot electromagnetic coil with signal obtained from first right-foot electromagnetic coil when the presence of a correctly positioned subject's legs have been positively detected on said platform for differences; and e. displaying presence of any differences on said display.
- Claim:
16. A method for detecting metal objects concealed in a shoe or on the lower part of a leg of a subject using a device as claimed in claim 6 , comprising the steps of: a. applying current to a first left-foot electromagnetic coil, and a first right-foot electromagnetic coil in turn for a short time period that is typically several milliseconds and recording eddy current signals therefrom; b. comparing signal from the first left-foot electromagnetic coil with signal from the first right-foot electromagnetic coil to eliminate effect of background interference; c. positively detecting the presence of a subject's legs, correctly positioned with respect to said indication on said platform via a detection system; d. comparing signal obtained from first left-foot electromagnetic coil with signal obtained from first right-foot electromagnetic coil when the presence of a correctly positioned subject's legs have been positively detected on said platform for differences; and e. displaying presence of any differences on said display.
- Current U.S. Class:
340/551
- Patent References Cited:
3971983 July 1976 Jaquet
5039981 August 1991 Rodriguez
5521583 May 1996 Frahm et al.
5680103 October 1997 Turner et al.
6791329 September 2004 Nelson
2005/0116825 June 2005 Manneschi
1329742 July 2003
- Primary Examiner:
Lieu, Julie Bichngoc
- Attorney, Agent or Firm:
Leone, George A.
- الرقم المعرف:
edspgr.06970087
Processing Request
No Comments.