Method for obtaining blood pressure data from optical sensor

    公开(公告)号:AU6140601A

    公开(公告)日:2001-11-20

    申请号:AU6140601

    申请日:2001-05-10

    Applicant: MOTOROLA INC

    Abstract: An optical sensor generates blood pressure data by obtaining two dimensional images of the surface of the patient's body, such as in the vicinity of the radial artery in the wrist area. Blood flow in the patient causes light to be reflected off a flexible reflective surface applied against the patient with a hold down pressure, and the scattering of light is sensed with a two-dimensional array of photo-detectors. The output of the photo-detectors during systolic and diastolic events is calibrated against known blood pressure measurements taken with a conventional air-cuff sphygmomanometer. Linear calibration relationships between output signal and blood pressure are obtained during calibration for some set of the photo-detectors. When blood pressure data is obtained from the patient, the linear calibration relationship between output signals and blood pressure is applied to the output signals from the set of photo-detectors, resulting in blood pressure data. The method provides for compensation for changes in hold down pressure and translation or rotation of the optical sensor relative to the patient. A preferred optical sensor arrangement for use in performing the method is also described.

    METHOD FOR OBTAINING BLOOD PRESSURE DATA FROM OPTICAL SENSOR

    公开(公告)号:CA2379131A1

    公开(公告)日:2001-11-15

    申请号:CA2379131

    申请日:2001-05-10

    Applicant: MOTOROLA INC

    Abstract: An optical sensor (12) generates blood pressure data by obtaining two dimensional images of the surface of the patient's body, such as in the vicinity of the radial artery in the wrist area. Blood flow in the patient causes light to be reflected off a flexible reflective surface (14) applied against the patient with a hold down pressure, and the scattering of light i s sensed with a two-dimensional array (17) of photo-detectors (18). The output of the photo-detectors during systolic and diastolic events is calibrated against known blood pressure measurements taken with a conventional air-cuff sphygmomanometer. Linear calibration relationships between output signal and blood pressure (FIG. 25) are obtained during calibration for some set of the photo-detectors. When blood pressure data is obtained from the patient, the linear calibration relationship between output signals and blood pressure is applied to the output signals from the set of photo-detectors, resulting in blood pressure data. The method provides for compensation for changes in hol d down pressure and translation or rotation of the optical sensor relative to the patient. A preferred optical sensor arrangement for use in performing th e method is also described.

    OPTICAL NONINVASIVE BLOOD PRESSURE SENSOR AND METHOD

    公开(公告)号:CA2378166A1

    公开(公告)日:2001-11-15

    申请号:CA2378166

    申请日:2001-05-10

    Applicant: MOTOROLA INC

    Abstract: A blood pressure sensor (12) includes a source of photo-radiation, such as a n array (30) of laser diodes (30A-I). The sensor also includes a two- dimensional, flexible reflective surface (14). The reflective surface is nominally positioned relative to the radiation source such that the radiatio n travels in a direction normal to the reflective surface. The reflective surface is placed adjacent to the location on the patient where the blood pressure data is to be acquired. Radiation from the source is reflected off of the reflective surface onto a two-dimensional array (17) of photo-detectors (18). Systolic and diastolic blood pressure fluctuations in the patient are translated into deflections of the patient's skin. These deflections cause corresponding deflections in the two dimensional reflective surface. The associated movement of said flexible reflective surface (14) due to blood pulsation causes scattering patterns from said reflective surface to be detected by the two dimensional array (17) of photo-detectors (18). The outp ut from the array of photo-detectors is calibrated to blood pressure in mmHg during a calibration procedure to obtain a set of calibration relationships for one or more of the individual detectors. The calibration relationships a re then used during acquisition of blood pressure data to arrive at blood pressure data.

    VEHICLE-GROUND SURFACE MEASUREMENT SYSTEM
    47.
    发明公开
    VEHICLE-GROUND SURFACE MEASUREMENT SYSTEM 失效
    测量系统的变量之间的车间与路面

    公开(公告)号:EP0776488A4

    公开(公告)日:1998-11-18

    申请号:EP96913961

    申请日:1996-05-07

    Applicant: MOTOROLA INC

    CPC classification number: G01S13/003 G01S7/024 G01S13/325 G01S13/60

    Abstract: A measurement device (103) and method determines various metrics between a vehicle (101) and a ground surface (105) using a transmitter-antenna (109) for emitting energy including a portion directed down toward the ground surface. A receiving antenna (115) has a portion oriented facing toward the transmitter-antenna for receiving a portion of the emitting energy along a direct path (117), and a portion oriented facing downwardly toward the ground surface for receiving a portion of the emitting energy reflected from the ground surface along a reflected path (113). A decoder provides separate indications of forward (121) and sideward (123) velocity relative to motion of the vehicle along the ground surface. Furthermore, the decoder comprises means for determining vehicle height (125) dependent on a measured difference in path length, vehicle level (127), or front to rear tilt angle, dependent on polarization elliptical ratio changes, and road surface conditions (129) dependent on amplitude and phase changes that occur versus time.

    IMPROVED PORTABLE POWER SOURCE AND RF TAG UTILIZING SAME.
    48.
    发明公开
    IMPROVED PORTABLE POWER SOURCE AND RF TAG UTILIZING SAME. 失效
    VERBESSERTE TRAGBARE STRMVERSORGUNG UND HF ETIKETT UNTER VERWENDUNG DERSELBEN。

    公开(公告)号:EP0649587A4

    公开(公告)日:1996-07-03

    申请号:EP94913249

    申请日:1994-03-02

    Applicant: MOTOROLA INC

    CPC classification number: G01S13/756 H04B1/1607 Y10S323/906

    Abstract: An RF tag (10) includes an RF receiver (16) and an RF transmitter (18). A power source (12) provides power to the receiver and transmitter. The power source includes a plurality of energy converters (22, 24, 26, 28, 30 and 32). Each energy converter is responsive to a predetermined form of incident energy for converting its respective predetermined form of incident energy to electrical current. At least two of the energy converters are responsive to respective different predetermined forms of incident energy for providing electrical current. A storage capacitor (54) stores the electrical current provided by the energy converters and is coupled to the RF receiver and RF transmitter. A plurality of RF tags (10, 110, 140, 160) utilizing the power source 12 are also described.

    Abstract translation: RF标签(10)包括RF接收器(16)和RF发射器(18)。 电源(12)向接收器和发射器提供电力。 电源包括多个能量转换器(22,24,26,28,30和32)。 每个能量转换器响应于预定形式的入射能量,以将其各自的预定形式的入射能量转换成电流。 至少两个能量转换器响应于各自不同的预定形式的入射能量以提供电流。 存储电容器(54)存储由能量转换器提供的电流并耦合到RF接收器和RF发射器。 还描述了利用电源12的多个RF标签(10,110,140,​​160)。

    RF TAGGING SYSTEM AND RF TAGS AND METHOD.
    49.
    发明公开
    RF TAGGING SYSTEM AND RF TAGS AND METHOD. 失效
    RF标签系统和RF标签和方法。

    公开(公告)号:EP0619908A4

    公开(公告)日:1996-03-13

    申请号:EP93924967

    申请日:1993-10-20

    Applicant: MOTOROLA INC

    Abstract: RF tagging system (10) has a plurality of resonant circuits (13) on a tag (12). When the tag (12) enters a detection zone (14), the system determines the resonant frequencies of each of the resonant circuits (13) and produces a corresponding code. Preferably, resonant frequency detection is implemented by simultaneously radiating signals at each possible resonant frequency for the tag circuits (13). The system is useful for coding any articles such as baggage or production inventory. Preferably, the radiated signals are phase shifted during the detection process, and signals received by receiver antennas, besides transmitter signals, may be monitored to improve the reliability of detecting the resonant circuits (13). Also, a preferred step adjustment configuration for capacitive metalizations (106, 110) of the resonant circuits is described. For radiating signals into the detection zone (14), focused beam antennas (201) may be used such that each resonant circuit location on the tag can be separately monitored. Also, an apparatus (300) for producing customized resonant circuit tags in accordance with a specified input code is described.

    METHOD FOR OBTAINING BLOOD PRESSURE DATA FROM OPTICAL SENSOR
    50.
    发明公开
    METHOD FOR OBTAINING BLOOD PRESSURE DATA FROM OPTICAL SENSOR 审中-公开
    程序用于确定血压数据是通过光学传感器来

    公开(公告)号:EP1211974A4

    公开(公告)日:2008-12-03

    申请号:EP01935299

    申请日:2001-05-10

    Applicant: MOTOROLA INC

    Abstract: An optical sensor (12) generates blood pressure data by obtaining two dimensional images of the surface of the patient's body, such as in the vicinity of the radial artery in the wrist area. Blood flow in the patient causes light to be reflected off a flexible reflective surface (14) applied against the patient with a hold down pressure, and the scattering of light is sensed with a two-dimensional array (17) of photo-detectors (18). The output of the photo-detectors during systolic and diastolic events is calibrated against known blood pressure measurements taken with a conventional air-cuff sphygmomanometer. Linear calibration relationships between output signal and blood pressure (FIG. 25) are obtained during calibration for some set of the photo-detectors. When blood pressure data is obtained from the patient, the linear calibration relationship between output signals and blood pressure is applied to the output signals from the set of photo-detectors, resulting in blood pressure data. The method provides for compensation for changes in hold down pressure and translation or rotation of the optical sensor relative to the patient. A preferred optical sensor arrangement for use in performing the method is also described.

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