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    • 7. 发明授权
    • Imaging apparatus and method
    • 成像设备及方法
    • US08619494B2
    • 2013-12-31
    • US13145260
    • 2010-01-21
    • Bajram Zeqiri
    • Bajram Zeqiri
    • G03B42/06A61B8/00G01H3/12
    • G01H3/125A61B8/00A61B8/0825A61B8/15A61B8/4281H01J31/495
    • A system (100) uses a pyroelectric membrane (122) and an ultrasound absorber (123) to measure the amount of ultrasonic energy received from a transmitter (105) through a sample (110). The thermal response of the pyroelectric membrane (122) is sensitive to ultrasound time-averaged intensity but is insensitive to the phase of the ultrasound. A waveform (200) shows rising (210), peak (220) and decaying (230) portions of a signal from the pyroelectric membrane (122) in response to on/off transitions of the transmitter (105). A system (300) uses a peak detector (333) to automatically turn the transmitter (105) on/off. A system (400) has background removal circuitry (444) to remove unwanted accelerometer-induced noise or electrical noise. A multi-element ultrasonic sensor (520) has cavities (555) so that a dummy sensor (521 b) can be used to compensate for unwanted accelerometer sensitivity of a sensor element (521 a). A sensor (620) has ultrasound absorbing (or reflective) regions (660) to compensate for unwanted accelerometer sensitivity. A system (900) has a low frequency path (909) sensitive to the pyroelectric effect, and a high frequency path (919) sensitive to the acoustic pressure amplitude, of a signal from a sensor (920). A sensor (1020) uses a pyroelectric material (1022) with poled regions (1099) separated by a non-poled region (1098).
    • 系统(100)使用热电膜(122)和超声波吸收器(123)来测量通过样品(110)从发射器(105)接收的超声能量的量。 热电膜(122)的热响应对超声时间平均强度敏感,但对超声波的相位不敏感。 响应于发射器(105)的接通/断开转换,波形(200)显示来自热电膜(122)的信号的上升(210),峰值(220)和衰减(230)部分。 系统(300)使用峰值检测器(333)来自动地打开/关闭发射器(105)。 系统(400)具有背景去除电路(444),以去除不需要的加速度计引起的噪声或电噪声。 多元件超声波传感器(520)具有空腔(555),使得可以使用虚拟传感器(521b)来补偿传感器元件(521a)的不期望的加速度计灵敏度。 传感器(620)具有超声波吸收(或反射)区域(660)以补偿不期望的加速度计灵敏度。 系统(900)具有对热电效应敏感的低频路径(909)和来自传感器(920)的信号对声压幅度敏感的高频路径(919)。 传感器(1020)使用具有由非极化区域(1098)分隔开的极化区域(1099)的热电材料(1022)。
    • 8. 发明申请
    • Imaging Apparatus and Method
    • 成像设备和方法
    • US20120010510A1
    • 2012-01-12
    • US13145260
    • 2010-01-21
    • Bajram Zeqiri
    • Bajram Zeqiri
    • A61B8/14
    • G01H3/125A61B8/00A61B8/0825A61B8/15A61B8/4281H01J31/495
    • A system (100) uses a pyroelectric membrane (122) and an ultrasound absorber (123) to measure the amount of ultrasonic energy received from a transmitter (105) through a sample (110). The thermal response of the pyroelectric membrane (122) is sensitive to ultrasound time-averaged intensity but is insensitive to the phase of the ultrasound. A waveform (200) shows rising (210), peak (220) and decaying (230) portions of a signal from the pyroelectric membrane (122) in response to on/off transitions of the transmitter (105). A system (300) uses a peak detector (333) to automatically turn the transmitter (105) on/off. A system (400) has background removal circuitry (444) to remove unwanted accelerometer-induced noise or electrical noise. A multi-element ultrasonic sensor (520) has cavities (555) so that a dummy sensor (521 b) can be used to compensate for unwanted accelerometer sensitivity of a sensor element (521 a). A sensor (620) has ultrasound absorbing (or reflective) regions (660) to compensate for unwanted accelerometer sensitivity. A system (900) has a low frequency path (909) sensitive to the pyroelectric effect, and a high frequency path (919) sensitive to the acoustic pressure amplitude, of a signal from a sensor (920). A sensor (1020) uses a pyroelectric material (1022) with poled regions (1099) separated by a non-poled region (1098).
    • 系统(100)使用热电膜(122)和超声波吸收器(123)来测量通过样品(110)从发射器(105)接收的超声能量的量。 热电膜(122)的热响应对超声时间平均强度敏感,但对超声波的相位不敏感。 响应于发射器(105)的接通/断开转换,波形(200)显示来自热电膜(122)的信号的上升(210),峰值(220)和衰减(230)部分。 系统(300)使用峰值检测器(333)来自动地打开/关闭发射器(105)。 系统(400)具有背景去除电路(444),以去除不需要的加速度计引起的噪声或电噪声。 多元件超声波传感器(520)具有空腔(555),使得可以使用虚拟传感器(521b)来补偿传感器元件(521a)的不期望的加速度计灵敏度。 传感器(620)具有超声波吸收(或反射)区域(660)以补偿不期望的加速度计灵敏度。 系统(900)具有对热电效应敏感的低频路径(909)和来自传感器(920)的信号对声压幅度敏感的高频路径(919)。 传感器(1020)使用具有由非极化区域(1098)分隔的极化区域(1099)的热电材料(1022)。