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    • 1. 发明授权
    • Impedance analysis technique for frequency domain characterization of magnetoelastic sensor element by measuring steady-state vibration of element while undergoing constant sine-wave excitation
    • 通过测量元件的稳态振动同时进行恒定正弦波激励的磁弹性传感器元件频域表征的阻抗分析技术
    • US07912661B2
    • 2011-03-22
    • US11710294
    • 2007-02-23
    • Kefeng ZengKeat Ghee OngXiping YangCraig A. Grimes
    • Kefeng ZengKeat Ghee OngXiping YangCraig A. Grimes
    • G01R23/16
    • G01N29/2412G01L1/125G01L1/127G01N29/028G01N29/036G01N29/4436G01N2291/02818G01N2291/02827
    • Circuitry and program code adapted for carrying out an associated technique for characterizing the response of one or more magnetoelastic sensor elements during exposure to an excitation field generated by an interrogation coil: including: (a) measuring a total sensor signal from the coil with the sensor element positioned within the excitation field within a spacing created by a winding of the coil; and (b) automatically determining: (i) a total measured impedance spectrum from said total sensor signal so measured, and (ii) a plurality of magnitude values representing the real part of a reconstructed impedance spectrum for the sensor element. The reconstructed impedance spectrum for the sensor element, having been calculated by subtracting an impedance generally attributable to the coil during the time an AC excitation signal is provided, from the total measured impedance. Subtraction of coil impedance from total complex impedance is accomplished by separate subtraction of the real part and of the imaginary part, represented as follows Re[Zs(ω)]=Re[Zt(ω)]−Re[Zc(ω)]  Equation (12) and Im[Zs(ω)]=Im[Zt(ω)]−Im[Zc(ω)]  Equation (13) where subscript “t” indicates total complex impedance, “s” indicates sensor element impedance, and “c” indicates coil impedance.
    • 电路和程序代码,适于执行相关技术,用于表征一个或多个磁弹性传感器元件在暴露于由询问线圈产生的激励场的响应时的响应:包括:(a)用传感器测量来自线圈的总传感器信号 元件位于由线圈的绕组产生的间隔内的激励场内; 和(b)自动确定:(i)来自所测量的所述总传感器信号的总测量阻抗谱,以及(ii)表示传感器元件的重构阻抗谱的实部的多个幅度值。 通过从总测量的阻抗中减去通常归因于线圈的阻抗计算的传感器元件的重构阻抗谱。 线圈阻抗从总复阻抗的减法是通过实部和虚部的分离减法来实现的,如下所示:Re [Zs(ω)] = Re [Zt(ω)] -Re [Zc(ω) (12)和Im [Zs(ω)] = Im [Zt(ω)] - Im [Zc(ω)]等式(13)其中下标“t”表示总复阻抗,“s”表示传感器元件阻抗, “c”表示线圈阻抗。
    • 2. 发明申请
    • System/unit and method employing a plurality of magnetoelastic sensor elements for automatically quantifying parameters of whole blood and platelet-rich plasma
    • 采用多个磁弹性传感器元件的系统/单元和方法,用于自动量化全血和富血小板血浆的参数
    • US20080261261A1
    • 2008-10-23
    • US12080472
    • 2008-04-02
    • Craig A. GrimesKefeng ZengKeat Ghee OngXiping Yang
    • Craig A. GrimesKefeng ZengKeat Ghee OngXiping Yang
    • C12Q1/02C12M1/00
    • G01N33/4905
    • A system/analyzer-unit and method/platform—using information obtained from at least one, adapted for a plurality of, magnetoelastic sensor elements in contact with one or more samples comprising blood from a patient—for automatically quantifying one or more parameters of the patient's blood. Information obtained from emissions measured from each of the sensor elements is uniquely processed to determine a quantification about the patient's blood, such as, quantifying platelet aggregation to determine platelet contribution toward clot formation; quantifying fibrin network contribution toward clot formation; quantifying platelet-fibrin clot interactions; quantifying kinetics of thrombin clot generation; quantifying platelet-fibrin clot strength; and so on. Structural aspects of the analyzer-unit include: a cartridge having at least one bay within which a sensor element is positioned; each bay in fluid communication with both (a) an entry port for injecting a first blood sample composed of blood taken from the patient (human or other mammal), and (b) a gas vent through which air displaced by injecting the first blood sample into the bay.
    • 从至少一个获得的系统/分析仪单元和方法/平台使用信息,其从适于与包含来自患者的血液的一个或多个样本接触的多个磁弹性传感器元件获得,用于自动量化一个或多个参数 患者血液 从每个传感器元件测量的排放获得的信息被独特地处理以确定关于患者血液的量化,例如量化血小板聚集以确定血小板对凝块形成的贡献; 量化纤维蛋白网络对凝块形成的贡献; 定量血小板 - 纤维蛋白凝块相互作用; 定量凝血酶凝块产生动力学; 定量血小板 - 纤维蛋白凝块强度; 等等。 分析器单元的结构方面包括:具有传感器元件定位在其中的至少一个隔间的盒; 每个隔间与(a)用于注射由患者(人或其他哺乳动物)取得的血液组成的第一血液样本的进入口和(b)通过注射第一血液样本而排出空气的排气口 进入海湾。
    • 3. 发明授权
    • Network of sensor nodes assemblies and method of remote sensing within liquid environments
    • 传感器节点组件网络和液体环境中的遥感方法
    • US07319411B2
    • 2008-01-15
    • US10622244
    • 2003-07-18
    • Keat Ghee OngCraig A. Grimes
    • Keat Ghee OngCraig A. Grimes
    • G08C17/00
    • G08C19/04G01N2001/021
    • A network of remote sensing node assemblies, a first and second of which each has a sensor element, as well as associated technique and program code for transmitting information collected about a liquid environment. The network provides the capability of sensing the liquid to collect a wide variety of types of information/data about the liquid and any surrounding environments, and transmitting from the originating node assembly to a different node within acoustic transmission range, and then transmitting further to a third node assembly where the information may be processed and communicated to a user, or further transmitted by way of suitable medium, preferably as electromagnetic signals, to a host location for processing into a compilation of data. Each of at least two sensing node assemblies has at least one sensor element adapted for operation while immersed within the liquid, a source of power, and a transducer for receiving acoustic waves/signals transmitted from another node assembly. The transducer is adapted for emitting sensor information collected by one or more sensor element(s) at that node, as well as acting as a pass-through node for information collected at other nodes. A third node assembly of the network is adapted for receiving and processing sensor information acoustically transmitted from other nodes. The third node can have its own processor unit(s) and means for transmitting sensor information to a remote host, whether originating at the third node (if so equipped) or another node assembly.
    • 遥感节点组件的网络,其中第一和第二个具有传感器元件,以及用于发送关于液体环境收集的信息的相关技术和程序代码。 网络提供了感测液体以收集关于液体和任何周围环境的各种类型的信息/数据的能力,以及从发声节点组件到声传播范围内的不同节点的传送,然后进一步传送到 第三节点组件,其中信息可以被处理并传送给用户,或者通过合适的介质进一步发送,优选地作为电磁信号发送到主机位置以用于处理数据的汇编。 至少两个感测节点组件中的每一个具有至少一个适于在浸入液体内的操作的传感器元件,功率源和用于接收从另一个节点组件传输的声波/信号的换能器。 传感器适于发射由该节点处的一个或多个传感器元件收集的传感器信息,以及用作在其他节点处收集的信息的直通节点。 网络的第三节点组件适于接收和处理从其他节点声学传输的传感器信息。 第三节点可以具有其自己的处理器单元和用于将传感器信息发送到远程主机的装置,无论是从第三节点(如果配备的话)发起的还是来自另一节点组件。
    • 4. 发明授权
    • Temperature, stress, and corrosive sensing apparatus utilizing harmonic response of magnetically soft sensor element (s)
    • 利用磁性软传感器元件的谐波响应的温度,应力和腐蚀性感测装置
    • US06639402B2
    • 2003-10-28
    • US10061840
    • 2002-01-31
    • Craig A. GrimesKeat Ghee Ong
    • Craig A. GrimesKeat Ghee Ong
    • G01N2700
    • G01N27/72G01N17/00
    • A temperature sensing apparatus including a sensor element made of a magnetically soft material operatively arranged within a first and second time-varying interrogation magnetic field, the first time-varying magnetic field being generated at a frequency higher than that for the second magnetic field. A receiver, remote from the sensor element, is engaged to measure intensity of electromagnetic emissions from the sensor element to identify a relative maximum amplitude value for each of a plurality of higher-order harmonic frequency amplitudes so measured. A unit then determines a value for temperature (or other parameter of interst) using the relative maximum harmonic amplitude values identified. In other aspects of the invention, the focus is on an apparatus and technique for determining a value for of stress condition of a solid analyte and for determining a value for corrosion, using the relative maximum harmonic amplitude values identified. A magnetically hard element supporting a biasing field adjacent the magnetically soft sensor element can be included.
    • 一种温度感测装置,包括可操作地布置在第一和第二时变询问磁场内的由软磁材料制成的传感器元件,所述第一时变磁场以比第二磁场的频率高的频率产生。 离开传感器元件的接收器被接合以测量来自传感器元件的电磁辐射的强度,以识别如此测量的多个高次谐波频率振幅中的每一个的相对最大振幅值。 然后,单元使用所标识的相对最大谐波振幅值来确定温度值(或interst的其他参数)。 在本发明的其它方面,重点是用于确定固体分析物的应力条件的值并使用所标识的相对最大谐波振幅值来确定腐蚀值的装置和技术。 可以包括支持邻近磁性软传感器元件的偏置场的磁性硬质元件。
    • 5. 发明授权
    • Technique and electronic circuitry for quantifying a transient signal using threshold-crossing counting to track signal amplitude
    • 技术和电子电路,用于使用阈值交叉计数来量化瞬态信号以跟踪信号幅度
    • US07113876B2
    • 2006-09-26
    • US10936125
    • 2004-09-08
    • Kefeng ZengKeat G. OngCraig A. Grimes
    • Kefeng ZengKeat G. OngCraig A. Grimes
    • G01R13/00G01N11/00
    • G01N29/4427G01N9/002G01N29/032G01N29/11G01N29/2412G01N29/46G01N2291/014G01N2291/02818G01N2291/0422G01N2291/0426G01N2291/0427
    • Circuitry adapted for carrying out associated techniques for: (a) calculating a damping factor, e.g., a damping ratio represented by ζ, or a quality factor Q, where ζ≈1/2Q, for a transient signal received, having been emitted from a resonator-type sensor element; (b) determining amplitude, A, of the transient signal; or (c) generating a frequency response dataset of interrelated points for the transient signal. A threshold comparison circuit is included for converting the transient signal received into a first and second digital waveform; the first digital waveform represents cycle crossings of the transient signal associated with a first threshold value, and the second digital waveform represents cycle crossings of the transient signal associated with a second threshold value. The transient signal may be converted, likewise, into third, and so on, digital waveforms, whereby the third digital waveform represents cycle crossings of the transient signal associated with a third threshold value. Respective digital counters are included, each of which is adapted for determining a total number of cycles of the first, second, third, and so on, digital waveform. A processing unit of suitable speed and capacity is employed for the calculating of the damping factor, determining an amplitude, and/or generating a frequency response dataset.
    • 电路适于执行相关技术,用于:(a)计算阻尼因子,例如由zeta表示的阻尼比或质量因子Q,其中对于从接收到的瞬态信号接收的瞬态信号,zeta≈1/ 2Q 谐振器型传感器元件; (b)确定瞬态信号的振幅A; 或(c)产生用于瞬态信号的相关点的频率响应数据集。 包括阈值比较电路,用于将接收的瞬态信号转换为第一和第二数字波形; 第一数字波形表示与第一阈值相关联的瞬态信号的周期交叉,并且第二数字波形表示与第二阈值相关联的瞬态信号的周期交叉。 瞬态信号也可以同样地转换为数字波形的第三等等,由此第三数字波形表示与第三阈值相关的瞬态信号的周期交叉。 包括各自的数字计数器,每个数字计数器适用于确定第一,第二,第三等等数字波形的总周期数。 采用合适的速度和容量的处理单元来计算阻尼因子,确定幅度和/或生成频率响应数据集。
    • 7. 发明授权
    • Resonant antenna
    • 共振天线
    • US4809009A
    • 1989-02-28
    • US148007
    • 1988-01-25
    • Dale M. GrimesCraig A. Grimes
    • Dale M. GrimesCraig A. Grimes
    • H01Q21/29H01Q21/00
    • H01Q21/29
    • A resonant antenna suitable for transmission and for reception over a broad range of frequencies combines electric and magnetic multipoles generated by linear and loop elements respectively. The minimum requirement is one electric and one magnetic dipole and one electric and magnetic quadrupole. The electric elements are driven in time quadrature with the magnetic elements. The elements of the minimum requirement lie in the same plane and along the same axis. The minimum number of elements for a free standing antenna is three loops and three dipoles. Maximum transmission and reception occur only in the same direction along the axis. The size of the antenna is reduced by introducing a ground conductor or plane along the antenna axis and eliminating the half elements on one side thereof and is further reduced by introducing a second ground plane normal to the first at the midpoint of its length and eliminating the quarter elements on one side.
    • 适用于传输和在宽频率范围内接收的谐振天线分别组合由线性和环路元件产生的电和磁多极。 最小要求是一个电和一个磁偶极子和一个电和四极杆。 电子元件与磁性元件及时正交驱动。 最小要求的要素位于同一平面上并沿同一轴线。 自由立体天线的最小元件数是三个环和三个偶极子。 最大传输和接收只发生在沿着轴的相同方向。 通过沿着天线轴引入接地导体或平面并消除其一侧上的半个元件并减小天线的尺寸,并且通过在其长度的中点处引入与第一接地平面垂直的第二接地平面,并且消除 四分之一元素在一边。
    • 9. 发明授权
    • Electrically-small low Q radiator structure and method of producing EM waves therewith
    • 电小型低Q散热器结构及其产生电磁波的方法
    • US06437750B1
    • 2002-08-20
    • US09614950
    • 2000-07-12
    • Craig A. GrimesDale M. GrimesFaton TefikuGang Lui
    • Craig A. GrimesDale M. GrimesFaton TefikuGang Lui
    • H01Q2100
    • H01Q21/26H01Q5/40H01Q7/00H01Q9/16H01Q21/24
    • An electrically small radiator structure for radiating electromagnetic waves having an electrical size, k*a, with a value less than &pgr;/2 and above &pgr;/20,000 and configured to have at least a first and second magnetic, or electric, dipole element. Dipole elements are preferably oriented such that a source-associated standing energy value for the structure, or Wds(tR), is low, Radiative Q value preferably less than ⅓(k*a)3; and each of the elements, whether paired with respective electric dipole elements, is in electrical communication through a feed circuit to at least one power source. Further, a first dipole pair (or element) oriented orthogonally with respect to a second pair (or element) are in voltage phase-quadrature; the structure is operational at a frequency below 5 GHz; and dipole moments oriented such that the following is generally satisfied: a divergence of the Poynting vector of the pairs with respect to retarded time, namely ∇|tR·N, has a value less than 1.0. Also, a method of producing electromagnetic waves using an electrically small radiator structure, including configuring the structure to have at least a first and second pair of dipole moments and an electrical size, k*a, with a value less than &pgr;/2 and above &pgr;/20,000; and powering a first feed area of the first pair and a second feed area of the second pair with at least one source operating at a frequency to radiate the waves.
    • 一种用于辐射具有小于pi / 2并高于pi / 20,000的电尺寸k * a的电磁波的电小型辐射器结构,并且被配置为具有至少第一和第二磁性或电偶极元件。 偶极元件优选地被定向成使得结构的源相关的驻波能量值(Wds(tR))为低,辐射Q值优选地小于1/3(k * a)3; 并且每个元件,无论是否与相应的电偶极元件配对,都通过馈电电路与至少一个电源电连通。 此外,相对于第二对(或元件)正交定向的第一偶极对(或元件)处于电压相位正交; 该结构在低于5GHz的频率下运行; 并且偶极矩被定向为使得通常满足以下:相对于延迟时间的对的坡印亭矢量的发散,即∇| tR.N具有小于1.0的值。 此外,使用电小型辐射器结构产生电磁波的方法,包括将该结构配置为具有至少第一和第二对偶极矩和电尺寸k * a,其值小于pi / 2及以上 pi / 20,000; 以及对所述第一对的第一馈送区域和所述第二对的第二馈送区域供电,其中至少一个源以频率操作以辐射所述波。
    • 10. 发明授权
    • Magnetoelastic sensing apparatus and method for remote pressure query of an environment
    • 用于环境的远程压力查询的磁弹感测装置和方法
    • US06393921B1
    • 2002-05-28
    • US09502663
    • 2000-02-11
    • Craig A. GrimesPlamen G. StoyanovDimitris Kouzoudis
    • Craig A. GrimesPlamen G. StoyanovDimitris Kouzoudis
    • G01L910
    • G01L9/16
    • A pressure sensing apparatus for operative arrangement within an environment, having: a sensor comprising a hermetically-sealed receptacle, at least one side of which has an flexible membrane to which a magnetically hard element is attached. Enclosed within the receptacle is a magnetostrictive element that vibrates in response to a time-varying magnetic field. Also included is a receiver to measure a plurality of successive values for magneto-elastic emission intensity of the sensor taken over an operating range of successive interrogation frequencies to identify a resonant frequency value for the sensor. Additional features include: (a) the magnetically hard element may be adhered to an inner or outer side of, or embedded within, the membrane; (b) the magnetostrictive element can include one or more of a variety of different pre-formed, hardened regions; (c) the magneto-elastic emission may be a primarily acoustic or electromagnetic emission; and (d) in the event the time-varying magnetic field is emitted as a single pulse or series of pulses, the receiver unit can detect a transitory time-response of the emission intensity of each pulse (detected after a threshold amplitude value for the transitory time-response is observed). A Fourier transform of the time-response can yield results in the frequency domain. Also, an associated method of sensing pressure of an environment is included that uses a sensor having a magnetostrictive element to identify a magneto-elastic resonant frequency value therefore. Using the magneto-elastic resonant frequency value identified, a value for the pressure of the environment can be identified.
    • 一种用于在环境内操作地布置的压力感测装置,其具有:传感器,其包括密封的容器,其至少一侧具有柔性膜,磁性元件附接到所述柔性膜。 封闭在容器内的是磁致伸缩元件,其响应于时变磁场而振动。 还包括接收器,用于测量在连续询问频率的操作范围上拍摄的传感器的磁弹性发射强度的多个连续值,以识别传感器的谐振频率值。 附加特征包括:(a)磁性硬元件可以粘附到膜的内侧或外侧或嵌入膜内; (b)磁致伸缩元件可以包括多种不同的预成型的硬化区域中的一种或多种; (c)磁弹性发射可以是主要的声学或电磁发射; 和(d)在时变磁场作为单个脉冲或一系列脉冲发射的情况下,接收器单元可以检测每个脉冲的发射强度的瞬时时间响应(在阈值振幅值 观察到短暂的时间反应)。 时间响应的傅立叶变换可以在频域中产生结果。 此外,包括感测环境压力的相关方法,其使用具有磁致伸缩元件的传感器来识别磁弹性谐振频率值。 使用识别的磁弹性共振频率值,可以确定环境压力的值。