GB2349759A - Radar heartbeat monitor - Google Patents

Radar heartbeat monitor Download PDF

Info

Publication number
GB2349759A
GB2349759A GB9908914A GB9908914A GB2349759A GB 2349759 A GB2349759 A GB 2349759A GB 9908914 A GB9908914 A GB 9908914A GB 9908914 A GB9908914 A GB 9908914A GB 2349759 A GB2349759 A GB 2349759A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
heartbeat
rti
gt
lt
device according
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.)
Withdrawn
Application number
GB9908914A
Other versions
GB9908914D0 (en )
Inventor
Bert Eric Tullsson
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.)
* AUTOLIV CELSIUS AB
AUTOLIV CELSIUS AB
Original Assignee
Autoliv Celsius Ab
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

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813Specially adapted to be attached to a specific body part
    • A61B5/6822Neck
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/02Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/021Measuring pressure in heart or blood vessels
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radiowaves
    • A61B5/0507Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radiowaves using microwaves or terahertz waves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/0002Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radiowaves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S13/00Systems 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
    • G01S13/88Radar or analogous systems specially adapted for specific applications

Abstract

A device for monitoring the heartbeat of a living body comprises a radar (1) which directs a beam of microwave radiation (e.g. within the frequency band 1-25 GHz) towards a body whose heartbeat is to be monitored. A phase-shift signal is derived representative of the phase-shift between the transmitted signal and the reflected signal. A controllable filter (3) (which may be a digital filter) filters the phase-shift signal to pass a frequency spectrum anticipated to contain signals corresponding to the heartbeat monitored. The output of the filter is passed to a spectral analysis unit (5) which provides a signal to control circuit (4) which controls the filter. An output signal representative of a heartbeat being monitored may be passed to an alarm (7) which may be associated with additional sensor means (8). The device may incorporate an antenna located in a support for the body whose heartbeat is to be monitored.

Description

DESCRIPTION OF INVENTION "IMPROVEMENTS IN OR RELATING TO A DEVICE FOR MONITORING A HEARTBEAT" THE PRESENT INVENTION relates to a device for monitoring a heartbeat.

There are many situations where it is desirable to be able to monitor a heartbeat.

Medical patients, both in hospital and at other locations, frequently require to have their heartbeat monitored. Additionally, it is desirable to be able to monitor the heartbeat of the driver of a vehicle or controller of machinery in order to determine whether the driver of the vehicle, or controller of the machinery is in a state where it is likely that the driver or controller may fall asleep.

The present invention seeks to provide an improved heartbeat monitoring apparatus.

According to one aspect of this invention there is provided a device for monitoring a heartbeat comprising a radar adapted to detect a beam of microwave radiation towards a living body whose heartbeat is to be monitored, and to derive a phase-shift signal representative of the phase-shift between a transmitted signal and a reflected signal, a controllable filter to filter the phaseshift signal and to pass a frequency spectrum anticipated to contain signals corresponding to the heartbeat to be monitored, an output of the filter being passed to a spectral analysis unit to conduct a spectral analysis to isolate the signals representative of the heartbeat, the spectral analysis unit being adapted to control the filter by reducing the pass-band width of the filter and selecting the pass-band frequency range so that the filter passes the signals corresponding to the heartbeat, the arrangement providing an output signal representative of the heartbeat being monitored.

Preferably the phase-shift signal is passed through <RTI>analogue-to-digital</RTI> converter, and the filter is a digital filter.

Conveniently means to monitor the output signal representative of the heartbeat and to generate an alarm signal if the monitored signal meets predetermined criteria.

Advantageously the alarm is associated with additional sensor means adapted to sense a parameter indicative of the approach of sleep to the person whose heartbeat is being monitored.

Conveniently the radar incorporates an antenna, the antenna being located in part of a support for the body whose heartbeat is to be monitored to direct said beam of microwave radiation towards the body supported by the support.

According to another aspect of this invention there is provided a device for monitoring a heartbeat of a living body, said device comprising a radar, the radar incorporating an antenna adapted to direct a lobe of radiation towards the person whose heartbeat is to be monitored, the antenna of the radar being mounted within a support for the body whose heartbeat is to be monitored.

Conveniently the support <RTI>for a</RTI> body is a seat.

Preferably the antenna is mounted in the back of the seat.

Alternatively the antenna is mounted in the squab of the seat.

In a further embodiment the support comprises a mattress or part of a bed.

Conveniently the antenna is mounted in a padded part of the support, the antenna being located within a radiation guide formed within the padded part of the support leading from the antenna to the surface of the padded part of the support being a surface which, in use, will be in contact or adjacent to part of the body whose heartbeat is to be monitored.

Preferably the radiation guide is formed from a generally tubular formation of a material impervious to microwave energy.

Conveniently said radiation guide is constituted by a fabric impregnated with a ferrite material.

Advantageously the device may incorporate a telemetry unit.

Preferably the radar operates at a power of between 1 and 10 milli-watts.

Conveniently the radar operates within the frequency band 1-25 gHz.

Preferably the radar operates at 2.45,5.8 or 24 gHz.

In order that the invention may be more readily understood, and so that further features thereof may be appreciated, the invention will now be described, by way of example, with reference to the accompanying drawings in which: FIGURE 1 is a block diagram of a preferred monitoring device in accordance with the invention, FIGURE 2 is a sectional view of an apparatus in accordance with the invention, and FIGURE 3 is a block diagram of a further embodiment of the invention.

<RTI>Referring</RTI> initially to Figure I of the accompanying drawings, a heartbeat monitoring unit comprises a radar apparatus 1 which incorporates an integral antenna adapted to transmit a lobe of electomagnetic radiation, such as microwave radiation towards a living body whose heartbeat is to be monitored.

The body may be a human body. The radiation, or at least part of the radiation, will be reflected by the body. The phase shift of the reflected signal as received by the radar relative to the signal transmitted by the radar is measured. Any change in phase shift is representative of a change of distance between the surface of the body and the radar. Part of the surface of the body moves with every heartbeat, and it is this movement that is to be detected and monitored.

The radar will transmit a lobe of microwave energy within the general frequency band of 1-25 gHz. For reasons of potential accuracy, the frequency band of 10-25 gHz is preferred, with the frequency of 24 gHz being especially preferred, since this frequency will it is believed, be available for general use.

Other frequencies available for general use are 2.45 gHz and 5.8 gHz, and thus these frequencies may find commercial favour for that reason. The preferred radar is a low power radar operating at a power of 1-10 <RTI>milli-watts.</RTI>

The radar may be a continuous wave radar, <RTI>or a</RTI> pulsed radar.

The radar is adapted to measure the phase shift between the transmitted signal and the received signal reflected from the person towards which the lobe of microwave radiation is detected. This signal will contain a component relating to the movement of the surface of the body caused by their heartbeat, and of course, any"background"that might be encountered by the lobe of radiation.

In the described embodiment of the invention, the output signal from the radar is passed to an <RTI>analogue-to-digital converter 2</RTI> which convents the original analogue signal into a digital signal. The digital signal is passed to a controllable filter 3 which is associated with a control circuit 4 adapted to control the filter 3.

The filter 3 is adapted initially to be a relatively broad band filter, passing signals and having a frequency within a range equivalent to that of the range of normal heartbeat frequencies, for example a range of <RTI>50-120</RTI> beats per minute.

The output of the filter 3 is passed to a spectral analysis circuit unit 5.

The spectral analysis unit operates to identify a signal passed by the filter 3 having a regular repeating frequency representative of a heartbeat. When the lobe of radiation is directed towards a person, such a signal will be present in the signal present at the output of the filter 3, since at least parts of the body of the person at whom the lobe of radiation is directed will move towards and away from the transmitting antenna of the radar with a frequency equal to the pulse rate.

The spectral analysis unit is connected to the control arrangement 4, and controls the filter 3 so that the filter <RTI>3</RTI> selectively passes a frequency band that incorporates the measured heartbeat frequency. The arrangement is such that should the heartbeat rate of the body at whom the lobe microwave energy is directed by the radar <RTI>1</RTI> should either rise or fall, the spectral analysis unit 5 will "follow"the rise or fall in heartbeat and will, through the control circuit 4, adjust the filter so that the filter 3 always passes the current heartbeat frequency of the body.

The output of the spectral analysis unit, in this embodiment, is passed to a monitor 6. The monitor 6 is adapted to monitor the heartbeat and to compare the measured heartbeat with heartbeat patterns that are typical of persons entering a state in which they are likely to fall asleep. It is well known that the rate of the heartbeat of a person who is about to fall asleep frequently falls, and should the monitor 6 detect such a situation, the monitor circuit 6 passes an output to an alarm circuit 7.

It is to be appreciated that the arrangement as described above may be mounted in a motor vehicle, or may be mounted in conjunction with machinery that is controlled by an operator, with the lobe of microwave energy being directed towards the driver of the vehicle, or the operator of the machine. In such an embodiment, the alarm circuit 7 may be an audible alarm <RTI>or a</RTI> visual alarm, or may be an arrangement which terminates operation of the machine.

In an arrangement of this type it is preferred that at least one additional sensor 8 is provided adapted to sense a parameter that may indicate that the vehicle driver, or machine operator, is approaching a state in which the driver or operator may fall asleep. Such a sensor may comprise, for example, a sensor adapted to sense whether the eyes of the driver/operator are open or closed, or a sensor adapted to sense whether the vehicle is being driven in an appropriate manner, or whether the machine is being operated in an appropriate manner.

However, it is to be understood that in an alternative embodiment the heartbeat monitoring unit may be used for medical purposes. The monitor circuit 6, in such an embodiment, will be adapted to respond to a predetermined heartbeat pattern, as may be appropriate.

Figure 2 illustrates a complete radar arrangement 10, which may be an arrangement incorporating the items described in Figure 1 in conjunction with the reference numerals <RTI>1</RTI> to 6, which is mounted in position in the seat-back <RTI>11</RTI> of a seat adapted to support a person 12 who is a driver of a vehicle, or the operator of a machine.

The radar unit 10 is located towards the rear of the back-rest <RTI>11</RTI> of the seat, and is spaced from the back Of the person 12 by padding <RTI>13.</RTI> The radar is adapted to transmit a lobe of radiation identifie in phantom, <RTI>14.</RTI> In order to constrain the lobe of radiation to have a desired pattern, part of the seatback 11, that forms the support of the torso of the person 12 occupying the seat, is configured to form a radiation impervious guide that directs the lobe 14 to occupy a desired position. The guide may have a generally tubular form surrounding the radar 10, and being directed towards the front part of the seatback <RTI>11.</RTI> The tubular guide 15 may be formed by a generally tubular structure surrounding the <RTI>radar 10,</RTI> and being directed towards the front part of the seatback <RTI>11.</RTI> The tubular guide 15 may be formed of a material that is impervious to microwave radiation. Thus the tubular guide 15 may be formed from a fabric soaked in a ferrite material and permitted to dry, which may be embedded within the padding of the seat or, alternatively, may be formed by an appropriate metalisation provided within the seat.

The region within the tubular radiation impervious guide will be filled with padding so that the radar and the radiation impervious guide do not lead to any discomfort for the occupant of the seat.

It can be seen, however, that the use of the guide 15 directs the lobe 14 of radiation from the radar 10 towards the back of the person 12 occupying the seat, thus minimising the risk of the lobe encountering any external"noise" The lobe 14 of radiation may be thus be constrained so that it is not a divergent lobe.

Whilst Figure 2 illustrates a radar device incorporated in the back of a seat which is acting as a support for a person, it is to be appreciated that a radar device of the type generally described above may be mounted using the same technique within a mattress of a bed that forms a support for a person.

It is to be appreciated that in appropriate circumstances, as shown in Figure 3, a radar device <RTI>10,</RTI> as mounted in a vehicle seat, or as mounted in a mattress, may be connected to a telemetry apparatus 16 adapted to transmit signals representative of the monitored heart rate or an alarm signal to a remote location. Thus, the present invention contemplates, within its scope, a mattress intended for use by a patient in a domestic situation, the mattress incorporating the described radar device, and being associated with a telemetry unit so that details of the heart beat of the patient or an alarm signal may be transmitted to a remote location for appropriate processing at that remote location.

Claims (20)

  1. CLAIMS: <RTI>1.</RTI> A device for monitoring a heartbeat comprising a radar adapted to detect a beam of microwave radiation towards a living body whose heartbeat is to be monitored, and to derive a phase-shift signal representative of the phase-shift between a transmitted signal and a reflected signal, a controllable filter to filter the phase-shift signal and to pass a frequency spectrum anticipated to contain signals corresponding to the heartbeat to be monitored, an output of the filter being passed to a spectral analysis unit to conduct a spectral analysis to isolate the signals representative of the heartbeat, the spectral analysis unit being adapted to control the filter by reducing the pass-band width of the filter and selecting the pass-band frequency range so that the filter passes the signals corresponding to the heartbeat, the arrangement providing an output signal representative of the heartbeat being monitored.
  2. 2. A device according to Claim I wherein the phase-shift signal is passed through <RTI>analogue-to-digital converter,</RTI> and the filter is a digital filter.
  3. 3. A device according to Claim I or 2 wherein the device further includes means to monitor the output signal representative of the heartbeat and to generate an alarm signal if the monitored signal meets predetermined criteria.
  4. 4. A device according to Claim 3 wherein the alarm is associated with additional sensor means adapted to sense a parameter indicative of the approach of sleep to the person whose heartbeat is being monitored.
  5. 5. A device according to any one of the preceding Claims wherein the radar incorporates an antenna, the antenna being located in part of a support for the body whose heartbeat is to be monitored to direct said beam of microwave radiation towards the body supporte by the support.
  6. 6. A device for monitoring a heartbeat of a living body, said device comprising a radar, the radar incorporating an antenna adapted to direct a lobe of radiation towards the person whose heartbeat is to be monitored, the antenna of the radar being mounted within a support for the body whose heartbeat is to be monitored.
  7. 7. A device according to Claim 5 or 6 wherein the support <RTI>for a</RTI> body is a seat.
  8. 8. A device according to Claim 7 wherein the antenna is mounted in the back of the seat.
  9. 9. A device according to Claim 7 wherein the antenna is mounted in the squab of the seat.
  10. 10. A device according to Claim 6 wherein the support comprises a mattress or part of a bed.
  11. 11. A device according to any one of Claims 5 to 10 wherein the antenna is mounted in a padded part of the support, the antenna being located within a radiation guide formed within the padded part of the support leading from the antenna to the surface of the padded part of the support being a surface which, in use, will be in contact or adjacent to part of the body whose heartbeat is to be monitored.
  12. 12. A device according to Claim <RTI>11</RTI> wherein the radiation guide is formed fi-om a generally tubular formation of a material impervious to microwave energy.
  13. 13. A device according to Claim <RTI>11 or 12</RTI> wherein said radiation guide is constituted by a fabric impregnated with a <RTI>femite</RTI> material.
  14. 14. A device according to any one of the preceding Claims incorporating a telemetry unit.
  15. 15. A device according to any one of the preceding Claims wherein the radar operates at a power of between 1 and 10 <RTI>milli-watts.</RTI>
  16. 16. A device according to any one of the preceding Claims wherein the radar operates within the frequency band 1-25 gHz.
  17. 17. A device according to Claim 16 wherein the radar operates at 2.45,5.8 or 24 gHz.
  18. 18. A heartbeat monitoring device substantially as herein described with reference to and as shown in Figure 1 of the accompanying drawings.
  19. 19. A heartbeat monitoring device substantially as herein described with reference to and as shown in Figure 2 of the accompanying drawings.
  20. 20. A heartbeat monitoring device substantially as herein described with reference to and as shown in Figure 3 of the accompanying drawings.
    20. A heartbeat monitoring device substantially as herein described with reference to and as shown in Figure 3 of the accompanying drawings.
    21. Any novel feature or combination of features disclosed herein.
    Amendments to the claims have been filed as follows 1. A device for monitoring a heartbeat comprising a radar adapted to direct a beam of microwave radiation towards a living body whose heartbeat is to be monitored, and to derive a phase-shift signal representative of the phase-shift between a transmitted signal and a reflected signal, a controllable filter to filter the phase-shift signal and to pass a frequency spectrum anticipated to contain signals corresponding to the heartbeat to be monitored, an output of the filter being passed to a spectral analysis unit to conduct a spectral analysis to isolate the signals representative of the heartbeat, the spectral analysis unit being adapted to control the filter by reducing the pass-band width of the filter and selecting the pass-band frequency range so that the filter passes the signals corresponding to the heartbeat, the arrangement providing an output signal representative of the heartbeat being monitored.
    2. A device according to Claim 1 wherein the phase-shift signal is passed through analogue-to-digital converter, and the filter is a digital filter.
    3. A device according to Claim 1 or 2 wherein the device further includes means to monitor the output signal representative of the heartbeat and to generate an alarm signal if the monitored signal meets predetermined criteria.
    4. A device according to Claim 3 wherein the alarm is associated with additional sensor means adapted to sense a parameter indicative of the approach of sleep to the person whose heartbeat is being monitored.
    5. A device according to any one of the preceding Claims wherein the radar incorporates an antenna, the antenna being located in part of a support for the body whose heartbeat is to be monitored to direct said beam of microwave radiation towards the body supported by the support.
    6. A device for monitoring a heartbeat of a living body, said device comprising a radar, the radar incorporating an antenna adapted to direct a lobe of radiation towards the person whose heartbeat is to be monitored, the antenna of the radar being mounted within a support for the body whose heartbeat is to be monitored.
    7. A device according to Claim 5 or 6 wherein the support <RTI>for a</RTI> body is a seat.
    8. A device according to Claim 7 wherein the antenna is mounted in the back of the seat.
    9. A device according to Claim 7 wherein the antenna is mounted in the squab of the seat.
    10. A device according to Claim <RTI>6</RTI> wherein the support comprises a mattress or part of a bed.
    <RTI>11.</RTI> A device according to any one of Claims 5 to 10 wherein the antenna is mounted in a padded part of the support, the <RTI>antenna</RTI> being located within a radiation guide formed within the padded part of the support leading from the antenna to the surface of the padded part of the support being a surface which, in use, will be in contact or adjacent to part of the body whose heartbeat is to be monitored.
    12. A device according to Claim 11 wherein the radiation guide is formed from a generally tubular formation of a material impervious to microwave energy.
    13. A device according to Claim <RTI>11 or 12</RTI> wherein said radiation guide is constituted by a fabric impregnated with a <RTI>ferrite</RTI> material.
    14. A device according to any one of the preceding Claims incorporating a telemetry unit.
    15. A device according to any one of the preceding Claims wherein the <RTI>radaroperatesatapowerofbetween I and lOmilli-watts</RTI> 16. A device according to any one of the preceding Claims wherein the radar operates within the frequency band 1-25 gHz.
    17. A device according to Claim 16 wherein the radar operates at <RTI>2.</RTI> 45,5 8 or 24 gHz.
    <RTI>18.</RTI> A heartbeat monitoring device substantially as herein described with reference to and as shown in Figure I of the accompanying drawings.
    19. A heartbeat monitoring device substantially as herein described with reference to and as shown in Figure 2 of the accompanying drawings.
GB9908914A 1999-04-19 1999-04-19 Improvements in or relating to a device for monitoring a heartbeat Withdrawn GB9908914D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9908914A GB9908914D0 (en) 1999-04-19 1999-04-19 Improvements in or relating to a device for monitoring a heartbeat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9908914A GB9908914D0 (en) 1999-04-19 1999-04-19 Improvements in or relating to a device for monitoring a heartbeat

Publications (2)

Publication Number Publication Date
GB9908914D0 GB9908914D0 (en) 1999-06-16
GB2349759A true true GB2349759A (en) 2000-11-08

Family

ID=10851814

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9908914A Withdrawn GB9908914D0 (en) 1999-04-19 1999-04-19 Improvements in or relating to a device for monitoring a heartbeat

Country Status (1)

Country Link
GB (1) GB9908914D0 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004089208A1 (en) * 2003-04-08 2004-10-21 Commonwealth Scientific And Industrial Research Organisation Microwave based monitoring system and method
WO2005092190A1 (en) * 2004-03-26 2005-10-06 Canon Kabushiki Kaisha Biological information monitoring apparatus
EP1803396A1 (en) * 2006-01-03 2007-07-04 Industrial Technology Research Institute Monitoring apparatus for physical movements of a body organ and method for the same
WO2007101343A1 (en) 2006-03-06 2007-09-13 Wireless 2000 Rf & Uwb Technologies Ltd. Ultra wideband monitoring systems and antennas
EP1935333A1 (en) * 2006-12-22 2008-06-25 Industrial Technology Research Institut Non-contact apparatus for monitoring cardiopulmonary activity signals and method for the same
EP2068703A2 (en) * 2006-09-21 2009-06-17 Noninvasive Medical Technologies, Inc. Apparatus and method for non-invasive thoracic radio interrogation
CN102988051A (en) * 2012-12-13 2013-03-27 中国人民解放军第四军医大学 Device and method for monitoring health of computer operator
US8545413B2 (en) 2006-12-13 2013-10-01 Industrial Technology Research Institute Non-contact apparatus for monitoring cardiopulmonary activity signals and method for the same
US8692717B2 (en) 2006-09-21 2014-04-08 Noninvasive Medical Technologies, Inc. Antenna for thoracic radio interrogation
EP2923642A1 (en) 2014-03-25 2015-09-30 Ulrich Scholten Application agnostic sensor, control computer and methods for operating
CN105476602A (en) * 2015-11-25 2016-04-13 方姝阳 Non-contact human vital sign measurement method and device
US9610015B2 (en) 2011-04-29 2017-04-04 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Radar apparatus for detecting multiple life—signs of a subject, a method and a computer program product

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085740A (en) * 1966-03-28 1978-04-25 Lockheed Corporation Method for measuring physiological parameter
US4513748A (en) * 1983-08-30 1985-04-30 Rca Corporation Dual frequency heart rate monitor utilizing doppler radar
US4991585A (en) * 1990-03-13 1991-02-12 Mmtc, Inc. Non-invasive respiration and/or heartbeat monitor or the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085740A (en) * 1966-03-28 1978-04-25 Lockheed Corporation Method for measuring physiological parameter
US4513748A (en) * 1983-08-30 1985-04-30 Rca Corporation Dual frequency heart rate monitor utilizing doppler radar
US4991585A (en) * 1990-03-13 1991-02-12 Mmtc, Inc. Non-invasive respiration and/or heartbeat monitor or the like

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Radar 97,IEE conference publication no.449, pages 150-154 *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004089208A1 (en) * 2003-04-08 2004-10-21 Commonwealth Scientific And Industrial Research Organisation Microwave based monitoring system and method
US7468034B2 (en) 2004-03-26 2008-12-23 Canon Kabushiki Kaisha Biological information monitoring apparatus
WO2005092190A1 (en) * 2004-03-26 2005-10-06 Canon Kabushiki Kaisha Biological information monitoring apparatus
EP1803396A1 (en) * 2006-01-03 2007-07-04 Industrial Technology Research Institute Monitoring apparatus for physical movements of a body organ and method for the same
WO2007101343A1 (en) 2006-03-06 2007-09-13 Wireless 2000 Rf & Uwb Technologies Ltd. Ultra wideband monitoring systems and antennas
US8428696B2 (en) 2006-03-06 2013-04-23 Sensiotec Inc. Ultra wideband monitoring systems and antennas
EP1996068A1 (en) * 2006-03-06 2008-12-03 Wireless 2000 RF & UWB Technologies Ltd. Ultra wideband monitoring systems and antennas
EP1996068A4 (en) * 2006-03-06 2011-10-19 Sensiotec Inc Ultra wideband monitoring systems and antennas
US8781563B2 (en) 2006-03-06 2014-07-15 Sensiotec Inc. Ultra wideband monitoring systems and antennas
EP2068703A2 (en) * 2006-09-21 2009-06-17 Noninvasive Medical Technologies, Inc. Apparatus and method for non-invasive thoracic radio interrogation
EP2068703A4 (en) * 2006-09-21 2011-07-20 Noninvasive Medical Technologies Inc Apparatus and method for non-invasive thoracic radio interrogation
US8692717B2 (en) 2006-09-21 2014-04-08 Noninvasive Medical Technologies, Inc. Antenna for thoracic radio interrogation
US8545413B2 (en) 2006-12-13 2013-10-01 Industrial Technology Research Institute Non-contact apparatus for monitoring cardiopulmonary activity signals and method for the same
CN102973254B (en) * 2006-12-22 2015-07-29 财团法人工业技术研究院 Non-contact method for acquiring cardiopulmonary activity signals and monitoring means
EP1935333A1 (en) * 2006-12-22 2008-06-25 Industrial Technology Research Institut Non-contact apparatus for monitoring cardiopulmonary activity signals and method for the same
CN102973254A (en) * 2006-12-22 2013-03-20 财团法人工业技术研究院 Non-contact type cardiopulmonary activity monitoring device and signal acquisition method thereof
US9610015B2 (en) 2011-04-29 2017-04-04 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Radar apparatus for detecting multiple life—signs of a subject, a method and a computer program product
CN102988051A (en) * 2012-12-13 2013-03-27 中国人民解放军第四军医大学 Device and method for monitoring health of computer operator
EP2923642A1 (en) 2014-03-25 2015-09-30 Ulrich Scholten Application agnostic sensor, control computer and methods for operating
US9746551B2 (en) 2014-03-25 2017-08-29 Ulrich Scholten Multi-application-transceiver device and methods for target monitoring
CN105476602A (en) * 2015-11-25 2016-04-13 方姝阳 Non-contact human vital sign measurement method and device

Also Published As

Publication number Publication date Type
GB9908914D0 (en) 1999-06-16 grant

Similar Documents

Publication Publication Date Title
Lindberg et al. Monitoring of respiratory and heart rates using a fibre-optic sensor
US6199904B1 (en) Detecting automobile seat occupant by microwave absorption
Baek et al. A smart health monitoring chair for nonintrusive measurement of biological signals
US6011477A (en) Respiration and movement monitoring system
US7306564B2 (en) Breath monitor
Lin Microwave sensing of physiological movement and volume change: A review
US7245956B2 (en) Unobtrusive measurement system for bioelectric signals
US7098674B2 (en) Occupant sensor
US5360008A (en) Respiratory and cardiac monitor
US6217525B1 (en) Reduced lead set device and method for detecting acute cardiac ischemic conditions
US20020145526A1 (en) Patient positioning monitoring apparatus and method of use thereof
US20030187341A1 (en) Method and system for extracting cardiac parameters from plethysmographic signals
Johnson‐Davies et al. Psychophysical tuning curves: Restricting the listening band to the signal region
US20040123667A1 (en) Remote-sensing method and device
US5590650A (en) Non-invasive medical monitor system
US20050107655A1 (en) Method and apparatus for the prevention of epileptic seizures
US5107855A (en) Apena monitor for detection of aperiodic sinusoidal movement
US20070008156A1 (en) Sleeping device and sleeper &#39;s in-bed state detection method
US7740588B1 (en) Wireless respiratory and heart rate monitoring system
US20090227882A1 (en) Ultra wideband monitoring systems and antennas
US5724024A (en) Device for detecting the presence of persons on seats
US20100170043A1 (en) Apparatus for monitoring vital signs
Inoue et al. Power spectral analysis of blood pressure variability in traumatic quadriplegic humans
US6204767B1 (en) Chair monitor
US5916179A (en) System and method for reducing iatrogenic damage to nerves

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)