-
公开(公告)号：US5673554A
公开(公告)日：1997-10-07
申请号：US463614
申请日：1995-06-05
CPC分类号： F02P23/045 , F02C7/264
摘要： An ignition apparatus for a combustor includes a microwave energy source that emits microwave energy into the combustor at a frequency within a resonant response of the combustor, the combustor functioning as a resonant cavity for the microwave energy so that a plasma is produced that ignites a combustible mixture therein. The plasma preferably is a non-contact plasma produced in free space within the resonant cavity spaced away from with the cavity wall structure and spaced from the microwave emitter.
摘要翻译： 用于燃烧器的点火装置包括微波能量源，其以在燃烧器的谐振响应内的频率向燃烧器发射微波能量，该燃烧器用作用于微波能量的谐振腔，从而产生点燃可燃的等离子体 混合物。 等离子体优选是在谐振腔内的自由空间中产生的非接触等离子体，其与空腔壁结构间隔开并与微波发射器间隔开。
-
公开(公告)号：US4577414A
公开(公告)日：1986-03-25
申请号：US728976
申请日：1985-04-30
IPC分类号： G01C17/26
CPC分类号： G01C17/26
摘要： A remotely readable fiber optic compass. A sheet polarizer is affixed to a magnet rotatably mounted in a compass body, such that the polarizer rotates with the magnet. The optical axis of the sheet polarizer is preferably aligned with the north-south axis of the magnet. A single excitation light beam is divided into four identical beams, two of which are passed through the sheet polarizer and through two fixed polarizing sheets which have their optical axes at right angles to one another. The angle of the compass magnet with respect to a fixed axis of the compass body can be determined by measuring the ratio of the intensities of the two light beams. The remaining ambiguity as to which of the four possible quadrants the magnet is pointing to is resolved by the second pair of light beams, which are passed through the sheet polarizer at positions which are transected by two semicircular opaque strips formed on the sheet polarizer. The incoming excitation beam and the four return beams are communicated by means of optical fibers, giving a remotely readable compass which has no electrical parts.
摘要翻译： 遥控光纤罗盘。 片状偏振器固定在可旋转地安装在罗盘体中的磁体上，使得偏光镜与磁体一起旋转。 偏光片的光轴优选与磁铁的南北轴对准。 单个激发光束被分成四个相同的光束，其中两个光束通过片状偏光片并通过两个固定的偏振片，它们的光轴彼此成直角。 罗盘磁体相对于罗盘体的固定轴的角度可以通过测量两个光束的强度的比例来确定。 关于磁体指向的四个可能象限中的哪一个的剩余模糊度被第二对光束解析，第二对光束在形成在薄片偏振器上的两个半圆形不透明条带横切的位置上穿过薄片偏振器。 传入的激励光束和四个返回光束通过光纤传送，给出了一个远程读取的罗盘，没有电气部分。
-
公开(公告)号：US5465897A
公开(公告)日：1995-11-14
申请号：US220306
申请日：1994-03-29
IPC分类号： B06B1/06 , B23K20/02 , H01L41/24 , B23K1/19 , B23K101/36
CPC分类号： B06B1/0677 , B23K20/023 , H01L41/313
摘要： An ultrasonic transducer is formed as a diffusion bonded assembly of piezoelectric crystal, backing material, and, optionally, a ceramic wear surface. The mating surfaces of each component are silver films that are diffusion bonded together under the application of pressure and heat. Each mating surface may also be coated with a reactive metal, such as hafnium, to increase the adhesion of the silver films to the component surfaces. Only thin silver films are deposited, e.g., a thickness of about 0.00635 mm, to form a substantially non-compliant bond between surfaces. The resulting transducer assembly is substantially free of self-resonances over normal operating ranges for taking resonant ultrasound measurements.
摘要翻译： 超声波换能器形成为压电晶体，背衬材料和任选的陶瓷磨损表面的扩散接合组件。 每个组件的配合表面是在压力和热力的应用下扩散粘合在一起的银膜。 每个配合表面也可以涂覆有诸如铪的反应性金属，以增加银膜与组分表面的粘合性。 仅沉积薄的银膜，例如约0.00635mm的厚度，以在表面之间形成基本上非柔顺的结合。 所得到的换能器组件在正常操作范围内基本上没有自谐振，用于进行共振超声测量。
-
公开(公告)号：US5355731A
公开(公告)日：1994-10-18
申请号：US880393
申请日：1992-05-08
IPC分类号： G01H13/00
CPC分类号： G01H13/00
摘要： A method is provided for grading production quantities of spherical objects, such as roller balls for bearings. A resonant ultrasound spectrum (RUS) is generated for each spherical object and a set of degenerate sphere-resonance frequencies is identified. From the degenerate sphere-resonance frequencies and known relationships between degenerate sphere-resonance frequencies and Poisson's ratio, a Poisson's ratio can be determined, along with a "best" spherical diameter, to form spherical parameters for the sphere. From the RUS, fine-structure resonant frequency spectra are identified for each degenerate sphere-resonance frequency previously selected. From each fine-structure spectrum and associated sphere parameter values an asphericity value is determined. The asphericity value can then be compared with predetermined values to provide a measure for accepting or rejecting the sphere.
摘要翻译： 提供了用于对球面物体的生产量进行分级的方法，例如用于轴承的滚珠。 对于每个球形物体产生共振超声波谱（RUS），并且识别一组简并球体共振频率。 从退化球体共振频率和退化球共振频率与泊松比之间的已知关系可以确定泊松比与“最佳”球直径，以形成球体的球面参数。 从RUS，对于先前选择的每个简并球共振频率，识别精细结构的共振频谱。 从每个精细结构光谱和相关球参数值，确定非球面度值。 然后将非球面度值与预定值进行比较，以提供接受或拒绝球体的措施。
-
公开(公告)号：US5062296A
公开(公告)日：1991-11-05
申请号：US585557
申请日：1990-09-20
申请人： Albert Migliori
发明人： Albert Migliori
CPC分类号： G01N29/12
摘要： A resonant ultrasound spectroscopy method provides a unique characterization of an object for use in distinguishing similar objects having physical differences greater than a predetermined tolerance. A resonant response spectrum is obtained for a reference object by placing excitation and detection transducers at any accessible location on the object. The spectrum is analyzed to determine the number of resonant response peaks in a predetermined frequency interval. The distribution of the resonance frequencies is then characterized in a manner effective to form a unique signature of the object. In one characterization, a small frequency interval is defined and stepped though the spectrum frequency range. Subsequent objects are similarly characterized where the characterizations serve as signatures effective to distinguish objects that differ from the reference object by more than the predetermined tolerance.
摘要翻译： 共振超声波光谱法提供用于区分具有大于预定公差的物理差异的类似物体的物体的独特表征。 通过将激励和检测传感器放置在物体上的任何可访问位置，为参考对象获得共振响应谱。 分析频谱以确定在预定频率间隔中的谐振响应峰值的数量。 谐振频率的分布的特征在于有效地形成对象的唯一签名。 在一个表征中，通过频谱范围定义和步进小的频率间隔。 后续对象的特征在于，其中特征用作有效地区分与参考对象不同的对象超过预定公差的签名。
-
公开(公告)号：US4976148A
公开(公告)日：1990-12-11
申请号：US406007
申请日：1989-09-12
摘要： An ultrasound resonant spectrometer determines the resonant frequency spectrum of a rectangular parallelepiped sample of a high dissipation material over an expected resonant response frequency range. A sample holder structure grips corners of the sample between piezoelectric drive and receive transducers. Each transducer is mounted on a membrane for only weakly coupling the transducer to the holder structure and operatively contacts a material effective to remove system resonant responses at the transducer from the expected response range. i.e., either a material such as diamond to move the response frequencies above the range or a damping powder to preclude response within the range. A square-law detector amplifier receives the response signal and retransmits the signal on an isolated shield of connecting cabling to remove cabling capacitive effects. The amplifier also provides a substantially frequency independently voltage divider with the receive transducer. The spectrometer is extremely sensitive to enable low amplitude resonance to be detected for use in calculating the elastic constants of the high dissipation sample.
摘要翻译： 超声共振光谱仪确定在预期谐振响应频率范围内的高耗散材料的长方体样品的共振频谱。 样品架结构在压电驱动和接收换能器之间夹住样品的角。 每个换能器安装在膜上，用于仅将换能器弱耦合到保持器结构，并可操作地接触有效地将换能器处的系统谐振响应从预期响应范围移除的材料。 即诸如金刚石的材料以使响应频率高于该范围或阻尼粉末以排除在该范围内的响应。 平方律检波器放大器接收响应信号，并在连接电缆的隔离屏蔽上重新发送信号，以消除布线电容效应。 放大器还为接收换能器提供基本上频率独立的分压器。 光谱仪非常敏感，可以检测低振幅共振，以用于计算高耗散样品的弹性常数。
-
公开(公告)号：US4599551A
公开(公告)日：1986-07-08
申请号：US672228
申请日：1984-11-16
IPC分类号： H02K44/08
CPC分类号： H02K44/085
摘要： A thermoacoustic magnetohydrodynamic electrical generator includes an intrinsically irreversible thermoacoustic heat engine coupled to a magnetohydrodynamic electrical generator. The heat engine includes an electrically conductive liquid metal as the working fluid and includes two heat exchange and thermoacoustic structure assemblies which drive the liquid in a push-pull arrangement to cause the liquid metal to oscillate at a resonant acoustic frequency on the order of 1,000 Hz. The engine is positioned in the field of a magnet and is oriented such that the liquid metal oscillates in a direction orthogonal to the field of the magnet, whereby an alternating electrical potential is generated in the liquid metal. Low-loss, low-inductance electrical conductors electrically connected to opposite sides of the liquid metal conduct an output signal to a transformer adapted to convert the low-voltage, high-current output signal to a more usable higher voltage, lower current signal.
摘要翻译： 热声磁流体动力发电机包括耦合到磁流体动力发电机的本征不可逆热声热发动机。 热引擎包括作为工作流体的导电液体金属，并且包括两个热交换和热声结构组件，其以推挽装置驱动液体，以使液体金属以大约1000Hz的谐振频率振荡 。 发动机定位在磁体的磁场中并且被定向为使得液态金属在与磁体的磁场正交的方向上振荡，从而在液态金属中产生交替电位。 电连接到液态金属的相对侧的低损耗低电感电导体将输出信号传导到适于将低电压，高电流输出信号转换成更可用的较高电压，较低电流信号的变压器。
-
公开(公告)号：US4489553A
公开(公告)日：1984-12-25
申请号：US445650
申请日：1982-11-30
CPC分类号： F25B9/145 , F02G1/043 , F25B29/00 , F25B9/14 , F02G2243/52 , F05C2225/08 , F25B2309/003 , F25B2309/1404 , F25B2309/1407 , F25B2309/1408 , F25B2309/1413 , F25B2309/1416 , F25B2309/1417 , F25B2309/1419
摘要： A class of heat engines based on an intrinsically irreversible heat transfer process is disclosed. In a typical embodiment the engine comprises a compressible fluid that is cyclically compressed and expanded while at the same time being driven in reciprocal motion by a positive displacement drive means. A second thermodynamic medium is maintained in imperfect thermal contact with the fluid and bears a broken thermodynamic symmetry with respect to the fluid. the second thermodynamic medium is a structure adapted to have a low fluid flow impedance with respect to the compressible fluid, and which is further adapted to be in only moderate thermal contact with the fluid. In operation, thermal energy is pumped along the second medium due to a phase lag between the cyclical heating and cooling of the fluid and the resulting heat conduction between the fluid and the medium. In a preferred embodiment the engine comprises an acoustical drive and a housing containing a gas which is driven at a resonant frequency so as to be maintained in a standing wave. Operation of the engine at acoustic frequencies improves the power density and coefficient of performance. The second thermodynamic medium can be coupled to suitable heat exchangers to utilize the engine as a simple refrigeration device having no mechanical moving parts. Alternatively, the engine is reversible in function so as to be utilizable as a prime mover by coupling it to suitable sources and sinks of heat.
摘要翻译： 公开了一种基于本质上不可逆的传热过程的热机。 在典型的实施例中，发动机包括循环压缩和膨胀的可压缩流体，同时通过正位移驱动装置以往复运动驱动。 第二热力学介质保持与流体的不完全热接触并且相对于流体具有破裂的热力学对称性。 第二热力学介质是适于相对于可压缩流体具有低流体阻力的结构，并且还适于仅与流体进行温和的热接触。 在操作中，由于流体的循环加热和冷却之间的相位滞后以及所导致的流体和介质之间的热传导，热能被沿着第二介质泵送。 在优选实施例中，发动机包括声驱动器和容纳以共振频率驱动以保持在驻波中的气体的壳体。 发动机在声频下的运行提高了功率密度和性能系数。 第二热力学介质可以耦合到合适的热交换器，以将发动机用作没有机械运动部件的简单制冷装置。 或者，发动机的功能是可逆的，以便可以通过将发动机耦合到合适的热源和水槽来作为原动机。
-
29.发明授权High capacity dc-dc voltage converter suitable for charging electronic camera flash lamps 失效大容量dc-dc电压转换器适用于对电子照相机闪光灯充电
公开(公告)号：US4489370A
公开(公告)日：1984-12-18
申请号：US422012
申请日：1982-09-23
申请人： Albert Migliori
发明人： Albert Migliori
CPC分类号： H02M1/40 , H02M3/3378 , H05B41/32
摘要： A portable, battery-powered high capacity dc-dc voltage converter suitable for charging capacitor-based devices such as electronic camera flash lamps is disclosed. The voltage converter utilizes two high frequency metal oxide semiconductor field effect power transistors which are driven in a push-pull arrangement by an emitter-follower full wave bridge circuit. The transistors drive a low leakage inductance toroidal ferrite-core power transformer at a frequency which is sufficiently high to avoid saturation of the transformer, resulting in high efficiency and low power consumption. The output of the transformer is rectified to produce a high capacity dc charging signal on the order of 300 volts with a maximum current of 28 amps. The voltage converter is capable of recharging commercially available inexpensive electronic 100-watt flash lamps at a rate of once every 1.8 seconds, compared with a rate of 15 seconds for comparable prior art self-contained charging units.
摘要翻译： 公开了一种便携式，电池供电的大容量dc-dc电压转换器，适用于对诸如电子照相机闪光灯的基于电容器的装置进行充电。 电压转换器利用两个高频金属氧化物半导体场效应晶体管，其通过发射极跟随全波桥电路以推挽方式驱动。 晶体管以足够高的频率驱动低漏感环形铁氧体磁芯电力变压器，以避免变压器饱和，导致高效率和低功耗。 变压器的输出被整流，以产生大约300伏的高容量直流充电信号，最大电流为28安培。 电压转换器能够以每1.8秒一次的速率对市售的廉价电子100瓦闪光灯进行充电，与现有技术的独立充电单元的15秒的速率相比。
-
公开(公告)号：US4443837A
公开(公告)日：1984-04-17
申请号：US427978
申请日：1982-09-29
CPC分类号： G03B15/02 , F16M11/043 , F16M11/10 , F16M11/245
摘要： A mounting fixture for supporting up to two electronic flash lamps and a reflective light umbrella on a photographic light stand is disclosed. The fixture includes two orthogonal flash lamp shoe brackets and an integral deflectable locking arm for securing the fixture body to a vertical post of a light stand. A locking bolt passes through coaxial bores in the arm and the fixture body. The locking bolt includes a cylindrical head having a transverse bore for receiving a shaft of a reflective umbrella. A tubular locking collar is interposed on the shaft of the bolt between the fixture body and the head of the locking bolt. The locking collar includes a pair of diametrically opposed semicircular recess cut into its tubular end edge which are alignable with the openings of the bore in the head of the bolt. The locking collar, together with the bolt head, operates to secure an umbrella shaft in place when the bolt is tightened to secure the mounting fixture on a light stand.
摘要翻译： 公开了一种用于在照相灯架上支撑多达两个电子闪光灯和反光灯的安装夹具。 该固定装置包括两个正交的闪光灯支架支架和一体的可偏转的锁定臂，用于将灯具本体固定到灯架的立柱上。 锁定螺栓穿过臂和夹具本体中的同轴孔。 锁定螺栓包括具有用于接收反射伞的轴的横向孔的圆柱形头部。 管状锁定套环插入在固定体和锁定螺栓的头部之间的螺栓的轴上。 锁定环包括切割成其管状端边缘的一对径向相对的半圆形凹槽，其可与螺栓头部中的孔的开口对准。 当螺栓拧紧以将安装夹具固定在轻型支架上时，锁定环与螺栓头一起用于将伞轴固定到位。
-
-
-
-
-
-
-
-
-
搜索结果
32 条记录 (耗时 0.023 秒)
