公开(公告)号：US06749573B2

公开(公告)日：2004-06-15

申请号：US09784414

申请日：2001-02-13

申请人： Timothy D. Bryant ,  Mark W. Wynkoop ,  Nancy M. H. Holloway ,  Allan J. Zuckerwar

发明人： Timothy D. Bryant ,  Mark W. Wynkoop ,  Nancy M. H. Holloway ,  Allan J. Zuckerwar

IPC分类号： A61B700

CPC分类号： A61B5/4362 ,  A61B5/02411 ,  Y10S156/934 ,  Y10T29/42 ,  Y10T29/49005 ,  Y10T29/4913 ,  Y10T29/49163 ,  Y10T29/49169 ,  Y10T29/49798 ,  Y10T156/1082 ,  Y10T156/19

摘要： A fetal heart monitoring system preferably comprising a backing plate having a generally concave front surface and a generally convex back surface, and at least one sensor element attached to the concave front surface for acquiring acoustic fetal heart signals produced by a fetus within a body. The sensor element has a shape that conforms to the generally concave back surface of the backing plate. In one embodiment, the at least one sensor element comprises an inner sensor, and a plurality of outer sensors surrounding the inner sensor. The fetal heart monitoring system can further comprise a web belt, and a web belt guide movably attached to the web belt. The web belt guide being is to the convex back surface of the backing plate.

摘要翻译： 一种胎心监测系统，优选地包括具有大致凹入的前表面和大体上凸的后表面的背板，以及附接到所述凹前表面的至少一个传感器元件，用于获取由身体内的胎儿产生的声胎心脏信号。 传感器元件具有与背板的大致凹入的后表面一致的形状。 在一个实施例中，至少一个传感器元件包括内部传感器和围绕内部传感器的多个外部传感器。 胎儿心脏监测系统还可以包括腹板带和可移动地连接到腹板带的腹板带引导件。 卷筒带导向件是背衬板的凸背面。

公开(公告)号：US3964319A

公开(公告)日：1976-06-22

申请号：US592159

申请日：1975-07-01

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Allan J. Zuckerwar

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Allan J. Zuckerwar

IPC分类号： G01H3/12 ,  G01L9/12 ,  G01L11/00

CPC分类号： G01H3/12 ,  G01L9/12

摘要： Improvements in instrumentation suitable for measuring aircraft noise and sonic booms. A converter produces an electric current proportional to the sound pressure level at a condenser microphone. The electric current is transmitted over a cable and amplified by a zero drive amplifier. The converter consists of a local oscillator, a dual-gate field-effect transistor (FET) mixer and a voltage regulator/impedance translator. The local oscillator generates a carrier voltage that is applied to one of the gates of the FET mixer. The FET mixer mixes the microphone signal with the carrier to produce an electrical current at the frequency of vibration of the microphone diaphragm. The voltage regulator/impedance translator regulates the voltage of the local oscillator and mixer stages, eliminates the carrier at the output and provides a low output impedance at the cable terminals. The improvements include automatic tuning compensation against changes in static microphone capacitance and means for providing a remote electrical calibration capability.

摘要翻译： 仪器的改进适用于测量飞机噪音和声波。 A转换器产生与电容式麦克风上的声压级成比例的电流。 电流通过电缆传输并由零驱动放大器放大。 该转换器由本地振荡器，双栅场效应晶体管（FET）混频器和电压调节器/阻抗转换器组成。 本地振荡器产生施加到FET混频器的一个栅极的载波电压。 该麦克风信号与载波混合，以产生麦克风隔膜振动频率的电流。 电压调节器/阻抗转换器调节本地振荡器和混频器的电压，消除输出端的载波，并在电缆端子处提供低输出阻抗。 这些改进包括针对静态麦克风电容变化的自动调谐补偿和提供远程电气校准功能的手段。

公开(公告)号：US20090022341A1

公开(公告)日：2009-01-22

申请号：US11780500

申请日：2007-07-20

申请人： Qamar A. Shams ,  Allan J. Zuckerwar

发明人： Qamar A. Shams ,  Allan J. Zuckerwar

IPC分类号： H04R25/00

CPC分类号： H04R29/00 ,  G01H11/02 ,  H04R19/00

摘要： The present invention is an extremely low frequency (ELF) microphone and acoustic measurement system capable of infrasound detection in a portable and easily deployable form factor. In one embodiment of the invention, an extremely low frequency electret microphone comprises a membrane, a backplate, and a backchamber. The backchamber is sealed to allow substantially no air exchange between the backchamber and outside the microphone. Compliance of the membrane may be less than ambient air compliance. The backplate may define a plurality of holes and a slot may be defined between an outer diameter of the backplate and an inner wall of the microphone. The locations and sizes of the holes, the size of the slot, and the volume of the backchamber may be selected such that membrane motion is substantially critically damped.

摘要翻译： 本发明是一种极低频（ELF）麦克风和声学测量系统，其能够在便携和易于展开的形状因子中进行次声检测。 在本发明的一个实施例中，极低频驻极体麦克风包括膜，背板和后室。 后室被密封以允许在后室与麦克风外部基本上不进行空气交换。 膜的符合性可能小于环境空气的一致性。 背板可以限定多个孔，并且可以在背板的外径和麦克风的内壁之间限定狭槽。 可以选择孔的位置和尺寸，槽的尺寸和后室的体积，使得膜运动基本上被临界阻尼。

公开(公告)号：US06551251B2

公开(公告)日：2003-04-22

申请号：US09784413

申请日：2001-02-13

申请人： Allan J. Zuckerwar ,  Dennis L. Mowrey

发明人： Allan J. Zuckerwar ,  Dennis L. Mowrey

IPC分类号： A61B700

CPC分类号： A61B5/4362 ,  A61B5/02411 ,  A61B7/04

摘要： A fetal heart monitoring system and method for detecting and processing acoustic fetal heart signals transmitted by different signal transmission modes. One signal transmission mode, the direct-contact mode, occurs in a first frequency band when the fetus is in direct contact with the maternal abdominal wall. Another signal transmission mode, the fluid propagation mode, occurs in a second frequency band when the fetus is in a recessed position with no direct contact with the maternal abdominal wall. The second frequency band is relatively higher than the first frequency band. The fetal heart monitoring system and method detect and process acoustic fetal heart signals that are in the first frequency band and in the second frequency band.

公开(公告)号：US5448904A

公开(公告)日：1995-09-12

申请号：US243665

申请日：1994-05-11

申请人： Allan J. Zuckerwar ,  David C. Davis

发明人： Allan J. Zuckerwar ,  David C. Davis

IPC分类号： G01H3/00 ,  G01H17/00

CPC分类号： G01H3/005

摘要： An apparatus for calibrating an acoustic sensor. The apparatus includes a transmission material having an acoustic impedance approximately matching the acoustic impedance of the actual acoustic medium existing when the acoustic sensor is applied in actual in-service conditions. An elastic container holds the transmission material. A first sensor is coupled to the container at a first location on the container and a second sensor coupled to the container at a second location on the container, the second location being different from the first location. A sound producing device is coupled to the container and transmits acoustic signals inside the container.

摘要翻译： 一种用于校准声学传感器的装置。 该装置包括具有声学阻抗的传输材料，其在实际使用状态下应用声学传感器时存在的实际声学介质的声阻抗近似匹配。 弹性容器保持透射材料。 第一传感器在容器的第一位置处联接到容器，并且第二传感器在容器的第二位置处联接到容器，第二位置不同于第一位置。 声音产生装置耦合到容器并在容器内传送声信号。

公开(公告)号：US5146780A

公开(公告)日：1992-09-15

申请号：US773376

申请日：1991-10-07

申请人： Allan J. Zuckerwar ,  Kim Chi T. Ngo

发明人： Allan J. Zuckerwar ,  Kim Chi T. Ngo

IPC分类号： G01H3/00 ,  H04R29/00

CPC分类号： H04R29/004 ,  G01H3/005

摘要： A vacuum-isolation vessel for measurement of thermal noise in microphones s an outer vessel and an inner vessel suspended within the outer vessel. A high vacuum is created between the inner and outer vessels to provide acoustical isolation. The suspension assembly coupled between the inner and outer vessels provides a substantially vibration-free environment. Thus, thermal noise in a microphone mounted within the inner vessel is accurately measured, especially at low thermal noise levels and at low frequencies.

摘要翻译： 用于测量麦克风中的热噪声的真空隔离容器具有悬挂在外容器内的外容器和内容器。 在内部和外部容器之间产生高真空以提供声学隔离。 联接在内部和外部容器之间的悬架组件提供了基本上无振动的环境。 因此，安装在内部容器内的麦克风中的热噪声被精确测量，特别是在低热噪声水平和低频下。

公开(公告)号：US4770038A

公开(公告)日：1988-09-13

申请号：US829042

申请日：1986-02-13

申请人： Allan J. Zuckerwar ,  David S. Mazel

发明人： Allan J. Zuckerwar ,  David S. Mazel

IPC分类号： F17C13/02 ,  G01F23/296 ,  G01F23/28

CPC分类号： F17C13/021 ,  G01F23/2962 ,  G01F23/2968 ,  F17C2250/0417 ,  Y10S367/908

摘要： An ultrasonic depth gauge 20 for liquids under high pressure is comprised of a transducer assembly 21 and a supporting electronics unit 22. The transducer assembly is mounted into the bottom wall of a storage vessel 12 with its resonating surface directly exposed to the highly pressurized liquid 13 in the vessel. The transducer assembly consists of a conventional transducer element 38 rigidly bonded to the inside wall of a bored out conventional high-pressure plug 30 thereby forming a composite resonator 50. The element and the plug wall resonate as one upon electrical excitation of the element while the transducer element is completely shielded from any exposure to the liquid under high pressure. The composite resonator sends a vibration up to the surface of the liquid where it is reflected back to the composite resonator. The supporting electronics unit measures the vibration round-trip transit time which is proportional to the depth 15 of the liquid.

摘要翻译： 用于高压液体的超声波测深仪20包括换能器组件21和支撑电子单元22.换能器组件安装在储存容器12的底壁中，其谐振表面直接暴露于高压液体13 在船上 换能器组件由传统的换能器元件38组成，传统的换能器元件38刚性地结合到钻孔的常规高压塞30的内壁上，从而形成复合谐振器50.元件和塞壁在元件的电激励时作为一体谐振，而 传感器元件在高压下完全不受任何暴露于液体的影响。 复合谐振器向液体的表面发出振动，并将其反射回复合谐振器。 支撑电子单元测量与液体的深度15成比例的振动往返运行时间。

公开(公告)号：US4445378A

公开(公告)日：1984-05-01

申请号：US444150

申请日：1982-11-24

申请人： Allan J. Zuckerwar

发明人： Allan J. Zuckerwar

IPC分类号： G01H15/00 ,  G01N29/00

CPC分类号： G01H15/00

摘要： Method and apparatus for measuring the acoustic impedance of a surface in which the surface is used to enclose one end of the chamber of a Helmholz resonator. Acoustic waves are generated in the neck of the resonator by a piston driven by a variable speed motor through a cam assembly. The acoustic waves are measured in the chamber and the frequency of the generated acoustic waves is measured by an optical device. These measurements are used to compute the compliance and conductance of the chamber and surface combined. The same procedure is followed with a calibration plate having infinite acoustic impedance enclosing the chamber of the resonator to compute the compliance and conductance of the chamber alone. Then by subtracting, the compliance and conductance for the surface is obtained.

摘要翻译： 用于测量表面的声阻抗的方法和装置，其中表面用于封闭Helmholz谐振器的腔室的一端。 声波通过由变速马达通过凸轮组件驱动的活塞在谐振器的颈部中产生。 在室中测量声波，并且通过光学装置测量产生的声波的频率。 这些测量用于计算室和表面组合的顺应性和电导率。 遵循相同的过程，具有包围谐振器的腔室的无限声阻抗的校准板来计算腔室的顺应性和电导率。 然后通过减去获得表面的顺应性和电导率。

公开(公告)号：US4149423A

公开(公告)日：1979-04-17

申请号：US900842

申请日：1978-04-28

申请人： Robert A. Administrator of the National Aeronautics and Space Administration with respect to an invention of Frosch ,  Allan J. Zuckerwar

发明人： Robert A. Administrator of the National Aeronautics and Space Administration with respect to an invention of Frosch ,  Allan J. Zuckerwar

IPC分类号： G01L9/00 ,  G01L9/12 ,  G01L11/00

CPC分类号： G01L9/0072 ,  G01L19/04 ,  G01L9/12

摘要： Apparatus for measuring pressure fluctuations in air or other gases in an area of elevated temperature. A condenser microphone is located in the area of elevated temperature and electronics for processing changes in the microphone capacitance is located outside the area and connected to the microphone by means of a high-temperature cable assembly. The microphone includes apparatus for decreasing the undesirable change in microphone sensitivity at high temperatures. The high-temperature cable assembly operates as a half-wavelength transmission line in an AM carrier system and maintains a large temperature gradient between the two ends of the cable assembly. The processing electronics utilizes a voltage controlled oscillator for automatic tuning thereby increasing the sensitivity of the measuring apparatus.

摘要翻译： 用于测量高温区域的空气或其他气体中的压力波动的装置。 电容麦克风位于高温区域，用于处理麦克风电容变化的电子设备位于该区域外部，并通过高温电缆组件连接到麦克风。 麦克风包括用于降低高温下麦克风灵敏度的不期望的变化的装置。 高温电缆组件在AM载体系统中作为半波长传输线工作，并且在电缆组件的两端之间保持较大的温度梯度。 处理电子器件利用压控振荡器进行自动调谐，从而提高测量装置的灵敏度。

公开(公告)号：US4061041A

公开(公告)日：1977-12-06

申请号：US740156

申请日：1976-11-08

申请人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Allan J. Zuckerwar

发明人： James C. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Fletcher ,  Allan J. Zuckerwar

IPC分类号： G01H3/12

CPC分类号： G01H3/12

摘要： This invention is a device for measuring small differences between relatively high sound pressure levels at two different microphone sites. It provides electrical insertion voltages, "pilot" voltages, as a means for continuously monitoring the gains of two acoustical channels. The difference between two pilot voltages is utilized to force the gain of one channel to track the other channel.

摘要翻译： 本发明是用于测量两个不同麦克风位置处相对较高声压级之间的小差异的装置。 它提供电插入电压“导频”电压，作为连续监测两个声道的增益的手段。 利用两个导频电压之间的差异来强制一个通道的增益跟踪另一个通道。