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公开(公告)号：US20230188135A1
公开(公告)日：2023-06-15
申请号：US18086193
申请日：2022-12-21
Applicant: Cypress Semiconductor Corporation
Inventor： Paul WALSH , Kofi MAKINWA , Matheus PIMENTA , Çagri GÜRLEYÜK , Dermot MACSWEENEY , Daniel O KEEFFE , Dennis SEGUINE
CPC classification number: H03K17/9547 , H03K17/9502 , G01V3/102 , G01D5/2006 , G01R27/2611
Abstract: One inductive sensor is configured to maintain a fixed frequency in a resonant circuit. One apparatus includes an inductance-to-digital converter (LDC). The LDC includes a digital filter to measure an inductance change of a sensor and convert the inductance change to a digital value. The LDC further includes a digital control loop to maintain a fixed frequency in the sensor. The sensor forms an oscillator in the digital control loop. An output of the digital control loop is representative of the inductance change of the sensor.
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公开(公告)号：US20180241256A1
公开(公告)日：2018-08-23
申请号：US15956588
申请日：2018-04-18
Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Inventor： Ta-Yung YANG
Abstract: The present invention provides a method and an apparatus for controlling the wireless induction power supply. The apparatus comprises a transmitter control circuit and a receiver control circuit. The method comprises generating a plurality of switching signals for switching a transmitter winding and generating a power; detecting a level of a transmitter signal from the transmitter winding; and controlling a switch to deliver the power from a receiver winding to a load. The receiver winding is coupled to receive the powerfrom the transmitter winding. The switching signals will be disabled if the level of the transmitter signal is not higher than a threshold over a first period or the level of the transmitter signal is higher than a high-threshold over a second period. Accordingly, the method and the apparatus according to the present invention have the foreign object detection (FOD) function for the safety.
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3.发明申请PORTABLE DETECTOR FOR METALS DETECTION INCLUDING AN ADVANCED SYSTEM FOR AUTOMATIC STANDBY 有权用于金属检测的便携式检测器，包括用于自动待机的高级系统公开(公告)号：US20150035525A1
公开(公告)日：2015-02-05
申请号：US14451754
申请日：2014-08-05
Inventor： Alessandro Manneschi
IPC: G01V3/10
Abstract: The present invention relates to a portable detector (1) for metal detection, the detector including: a head (11) extending longitudinally and comprising an inductive transducer for measuring a variation in its inductance and/or for measuring parasite currents caused in the metals to be detected, and a body (13) including a controller programmed to control the activation or deactivation of a standby function of the detector, and a sensor for measuring displacement of the detector (1), and/or for measuring the orientation of the detector (1), the controller (20) controlling activation of the standby function as a function of signals received: of the inductive transducer on the one hand, and of the sensor on the other hand.
Abstract translation: 本发明涉及一种用于金属检测的便携式检测器（1），该检测器包括：纵向延伸的头部（11），包括用于测量其电感变化和/或用于测量金属中引起的寄生电流的感应换能器 以及包括被编程以控制检测器的待机功能的激活或去激活的控制器的主体（13）和用于测量检测器（1）的位移的传感器和/或用于测量检测器的取向的传感器 （1）中，所述控制器（20）控制所述备用功能的激活作为所述感应传感器和所述传感器接收的信号的函数。
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公开(公告)号：US20070200562A1
公开(公告)日：2007-08-30
申请号：US11711900
申请日：2007-02-28
Applicant: Osamu Shimomura , Tsutomu Nakamura , Kenji Takeda , Akitoshi Mizutani , Takao Ban
Inventor： Osamu Shimomura , Tsutomu Nakamura , Kenji Takeda , Akitoshi Mizutani , Takao Ban
IPC: G01R33/14
CPC classification number: G01V3/102
Abstract: An eddy current type sensor for detecting a conductor includes a LC circuit and an oscillator. The LC circuit has a coil and a capacitor connected in parallel with the coil. The oscillator supplies an alternating current of a predetermined oscillation frequency to the LC circuit. A signal voltage outputted from the LC circuit has a first voltage when the distance between the coil and the conductor is minimum and a second voltage when the distance between the coil and the conductor is maximum. A voltage difference between the first and second voltages has a first difference at a first temperature and has a second difference at a second temperature. The first and second differences become equal to each other at a first frequency and a second frequency. The oscillation frequency is set close to the first frequency or the second frequency.
Abstract translation: 用于检测导体的涡流型传感器包括LC电路和振荡器。 LC电路具有与线圈并联连接的线圈和电容器。 振荡器向LC电路提供预定振荡频率的交流电。 当线圈和导体之间的距离最小时，从LC电路输出的信号电压具有第一电压，当线圈和导体之间的距离最大时，第二电压。 第一和第二电压之间的电压差在第一温度下具有第一差异，并且在第二温度下具有第二差。 第一和第二差异在第一频率和第二频率处彼此相等。 振荡频率设定为接近于第一频率或第二频率。
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公开(公告)号：US5034704A
公开(公告)日：1991-07-23
申请号：US529357
申请日：1990-05-29
Applicant: Hidehiro Tomioka , Masakatsu Hosoya , Kenji Ueda
Inventor： Hidehiro Tomioka , Masakatsu Hosoya , Kenji Ueda
CPC classification number: G01V3/102 , H03K17/9505 , H03K17/954 , H03K2217/952
Abstract: A high frequency oscillation type proximity switch, comprising: an oscillation circuit having a first resonant frequency; a tank circuit connected in a positive feedback path of the oscillation circuit and including an LC resonant circuit having a second resonant frequency slightly different from the first resonant frequency; and a comparator circuit which discriminates the amplitude of an oscillation output of the oscillating circuit at a predetermined threshold level; the comparator producing a detection output signal when a nonmagnetic metallic object is brought to a certain proximity of a coil included in the LC resonant circuit and a level of the oscillation has thereby changed by a certain amount as a result of a change in the susceptance of the coil. Since the approach of a magnetic object increases the loss of the coil whereas the approach of a nonmagnetic metallic object increases the susceptance of the coil, it is possible to detect magnetic objects alone, nonmagnetic metallic objects alone, or both magnetic objects and nonmagnetic metallic objects alike by appropriately selecting the resonant frequencies of the oscillation circuit, and the tank circuit and the threshold level of the comparator circuit.
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Patent Agency Ranking
公开(公告)号：US5012206A
公开(公告)日：1991-04-30
申请号：US511767
申请日：1990-04-20
Applicant: Burkhard Tigges
Inventor： Burkhard Tigges
CPC classification number: H03K17/954 , G01V3/102 , H03K2217/952
Abstract: An inductive proximity switch in which a quartz oscillator is connected to a sensor resonant circuit having a sensor coil which is adapted to be influenced by the approach of electrically conductive nonmagnetic nonferrous metal (NF) objects and ferromagnetic metal (FE) objects. A detecting circuit detects when the sensor resonant circuit has an impedance which is indicative of either an NF object or an FE object at a predetermined switching distance from the sensor coil, thus causing the proximity switch to exhibit the same switching distance for both NF and FE objects. The oscillator frequency and the impedance of the sensor resonant circuit at the oscillator frequency are respectively set to be equal to a critical frequency and a critical impedance value at a critical response point defined by a point where impedance-frequency characteristic curves of the sensor resonant circuit under the influence of NF objects and FE objects at the predetermined switching distance intersect. The oscillator frequency and the natural resonant frequency of the sensor resonant circuit when it is uninfluenced by an approaching object are set to be slightly different from each other.
Abstract translation: 一种电感式接近开关，其中石英振荡器连接到具有传感器线圈的传感器谐振电路，所述传感器线圈适于受到导电非磁性有色金属（NF）物体和强磁性金属（FE）物体的接近的影响。 检测电路检测传感器谐振电路何时具有指示NF物体或FE物体在距离传感器线圈的预定切换距离处的阻抗，从而使接近开关对NF和FE展现相同的切换距离 对象 传感器谐振电路在振荡器频率下的振荡频率和阻抗分别设定为等于关键响应点的临界频率和临界阻抗值，临界响应点由传感器谐振电路的阻抗 - 频率特性曲线 在NF物体和FE物体的影响下，在预定的切换距离处相交。 当传感器谐振电路不受接近物体的影响时，振荡器频率和固有谐振频率被设置为彼此稍微不同。
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公开(公告)号：US4860756A
公开(公告)日：1989-08-29
申请号：US89190
申请日：1987-08-25
Applicant: Harvey W. Ko , Lynn W. Hart , Joseph P. Skura
Inventor： Harvey W. Ko , Lynn W. Hart , Joseph P. Skura
Abstract: An apparatus and method for non-invasive sensing of bone healing is disclosed. The apparatus and method uses an electromagnetic field to measure impedance changes at and about the bone fracture site during the healing process. The impedance change at the fracture site is a direct indication of the mechanical strength of the fracture site. A multi-coil sensor array is taught, which may be sutured to the patient's skin or mounted onto a plug that is inserted through a window in the cast.
Abstract translation: 公开了一种用于骨愈合的非侵入式感测的装置和方法。 该装置和方法使用电磁场来测量愈合过程中骨折部位处和周围的阻抗变化。 骨折部位的阻抗变化直接指示骨折部位的机械强度。 教导了多线圈传感器阵列，其可以缝合到患者的皮肤上或者被安装到插入通过铸件中的窗口的塞子上。
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公开(公告)号：US4839602A
公开(公告)日：1989-06-13
申请号：US927276
申请日：1986-11-04
Applicant: Charles D. Pletcher
Inventor： Charles D. Pletcher
CPC classification number: A24C5/3412 , G01N15/0656 , G01V3/102
Abstract: A device having a detector element for detecting small particles of metal moving in a stream of particulate matter, such as tobacco filler. The detector element is a coil through which the stream passes. The coil is the inductor of an oscillating circuit and is also part of the negative feedback loop of an operational amplifier. Inductance changes caused by the presence of metal become impedance changes that alter the amplifier gain, changing the amplitude of the AC component of an alternating current output signal. The signal peaks are shifted further, increasing detector amplitude, by coupling the signal through a capacitor to a source of potential so that the DC component of the signal also changes as the change in inductance allows current to flow through the capacitor.
Abstract translation: 一种具有用于检测在诸如烟草填料的颗粒物流中移动的金属的小颗粒的检测器元件的装置。 检测器元件是流通过的线圈。 线圈是振荡电路的电感器，也是运算放大器的负反馈环路的一部分。 由金属的存在导致的电感变化成为改变放大器增益的阻抗变化，改变交流输出信号的交流分量的振幅。 信号峰值进一步移动，通过将信号通过电容器耦合到电位源来增加检测器幅度，使得信号的DC分量也随着电感的变化而改变，从而使电流流过电容器。
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9.发明授权Non-invasive electromagnetic technique for monitoring bone healing and bone fracture localization 失效用于监测骨愈合和骨折定位的非侵入性电磁技术
公开(公告)号：US4688580A
公开(公告)日：1987-08-25
申请号：US753824
申请日：1985-07-11
Applicant: Harvey W. Ko , Lynn W. Hart
Inventor： Harvey W. Ko , Lynn W. Hart
CPC classification number: G01V3/102 , A61B5/053 , A61B5/4504
Abstract: An apparatus and method for non-invasive sensing of bone healing is disclosed. The apparatus and method uses an electromagnetic field to measure impedance changes at the bone fracture site during the healing process. The impedance change at the fracture site is a direct indication of the mechanical strength of the fracture site.
Abstract translation: 公开了一种用于骨愈合的非侵入式感测的装置和方法。 该装置和方法使用电磁场来测量愈合过程中骨折部位的阻抗变化。 断裂部位的阻抗变化直接指示骨折部位的机械强度。
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公开(公告)号：US4526177A
公开(公告)日：1985-07-02
申请号：US507358
申请日：1983-06-24
Applicant: Michael A. Rudy , Joseph Jacob
Inventor： Michael A. Rudy , Joseph Jacob
CPC classification number: A61B5/06 , G01V3/102 , H03K17/954
Abstract: A wire sensing coil is sealed in the tip of an elongate, rigid, plastic probe, and is connected by a coaxial cable releasably to a housing containing a fixed frequency, crystal-controlled oscillator, the output of which is applied through a high impedance resistor and the cable to the coil. The number of turns in the coil and the cable length are carefully selected so that the coil remains tuned to the frequency of the oscillator, except when the tip of the probe approaches a metal object, at which time the voltage drop across the coil decreases. The housing also contains an audible alarm, and a sensing circuit which detects the voltage drop across the coil, and which energizes the alarm when the voltage across the coil drops below a preset or predetermined level. The housing also contains a rechargable battery for supplying power to the oscillator and alarm circuits, and a recharging circuit for recharging the battery. A manually operable switch on the housing connects the battery to the oscillator when the switch is in its ON position, and connects the recharging circuit to the battery when in its OFF position.
Abstract translation: 线感测线圈密封在细长的刚性塑料探针的尖端中，并通过同轴电缆可释放地连接到包含固定频率的晶体振荡器的壳体，其输出通过高阻抗电阻器 和电缆到线圈。 仔细选择线圈中的匝数和电缆长度，使得线圈保持调谐到振荡器的频率，除非探头的尖端接近金属物体，此时线圈上的电压降降低。 外壳还包含一个声音报警器，以及检测线圈两端的电压降的检测电路，当线圈两端的电压下降到预设或预定的电平以下时，该报警器通电。 壳体还包含用于向振荡器和报警电路供电的可再充电电池，以及用于为电池充电的再充电电路。 当开关处于ON位置时，壳体上的手动开关将电池连接到振荡器，并且在处于OFF位置时将充电电路连接到电池。
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