CA2199121A1 - Range-gated field disturbance sensor with range-sensitivity compensation - Google Patents

Range-gated field disturbance sensor with range-sensitivity compensation

Info

Publication number
CA2199121A1
CA2199121A1 CA002199121A CA2199121A CA2199121A1 CA 2199121 A1 CA2199121 A1 CA 2199121A1 CA 002199121 A CA002199121 A CA 002199121A CA 2199121 A CA2199121 A CA 2199121A CA 2199121 A1 CA2199121 A1 CA 2199121A1
Authority
CA
Canada
Prior art keywords
burst
range
bursts
sequence
transmitter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002199121A
Other languages
French (fr)
Other versions
CA2199121C (en
Inventor
Thomas E. Mcewan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lawrence Livermore National Security LLC
Original Assignee
Thomas E. Mcewan
The Regents Of The University Of California
Lawrence Livermore National Security, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomas E. Mcewan, The Regents Of The University Of California, Lawrence Livermore National Security, Llc filed Critical Thomas E. Mcewan
Publication of CA2199121A1 publication Critical patent/CA2199121A1/en
Application granted granted Critical
Publication of CA2199121C publication Critical patent/CA2199121C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/0507—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves  using microwaves or terahertz waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/0209—Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/18—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein range gates are used
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • G01S13/348—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using square or rectangular modulation, e.g. diplex radar for ranging over short distances
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection

Abstract

A field disturbance sensor operates with a relatively low power, provides an adjustable operating range, is not hypersensitive at close range, allows co-location of multiple sensors, and is inexpensive to manufacture. The sensor includes a transmitter (11) that transmits a sequence of bursts (19) of electromagnetic energy. The transmitter frequency is modulated at an intermediate frequency. The sequence of bursts has a burst repetition rate and each burst has a burst width and comprises a number of cycles at a transmitter frequency. The sensor includes a receiver (21) which receives electromagnetic energy at the transmitter frequency, and includes a mixer (22) which mixes a transmitted burst with reflections of the same transmitted burst to produce an intermediate frequency signal. Circuitry, responsive to the intermediate frequency signal indicates disturbances in the sensor field. The burst repetition rate is randomly or pseudo-randomly modulated so that bursts in the sequence of bursts have a phase which varies.
CA002199121A 1994-09-06 1995-08-29 Range-gated field disturbance sensor with range-sensitivity compensation Expired - Lifetime CA2199121C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/300,769 US5521600A (en) 1994-09-06 1994-09-06 Range-gated field disturbance sensor with range-sensitivity compensation
US08/300,769 1994-09-06
PCT/US1995/011046 WO1996007931A1 (en) 1994-09-06 1995-08-29 Range-gated field disturbance sensor with range-sensitivity compensation

Publications (2)

Publication Number Publication Date
CA2199121A1 true CA2199121A1 (en) 1996-03-14
CA2199121C CA2199121C (en) 2006-05-09

Family

ID=23160511

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002199121A Expired - Lifetime CA2199121C (en) 1994-09-06 1995-08-29 Range-gated field disturbance sensor with range-sensitivity compensation

Country Status (10)

Country Link
US (1) US5521600A (en)
EP (1) EP0779992B1 (en)
JP (2) JP3631254B2 (en)
CN (1) CN1104648C (en)
AT (1) ATE227851T1 (en)
AU (1) AU692921B2 (en)
CA (1) CA2199121C (en)
DE (1) DE69528840T2 (en)
MX (1) MX9701648A (en)
WO (1) WO1996007931A1 (en)

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Also Published As

Publication number Publication date
JP3631254B2 (en) 2005-03-23
JP3819924B2 (en) 2006-09-13
EP0779992A4 (en) 1999-05-06
EP0779992B1 (en) 2002-11-13
DE69528840T2 (en) 2003-09-04
CN1104648C (en) 2003-04-02
JPH10505670A (en) 1998-06-02
AU692921B2 (en) 1998-06-18
EP0779992A1 (en) 1997-06-25
CN1157657A (en) 1997-08-20
JP2005121665A (en) 2005-05-12
CA2199121C (en) 2006-05-09
MX9701648A (en) 1997-06-28
WO1996007931A1 (en) 1996-03-14
US5521600A (en) 1996-05-28
ATE227851T1 (en) 2002-11-15
DE69528840D1 (en) 2002-12-19
AU3462395A (en) 1996-03-27

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MKEX Expiry

Effective date: 20150831