Methods and devices for eddy current PCB inspection
    1.
    发明授权
    Methods and devices for eddy current PCB inspection 失效
    用于涡流PCB检测的方法和装置

    公开(公告)号:US06975108B2

    公开(公告)日:2005-12-13

    申请号:US10705865

    申请日:2003-11-13

    CPC classification number: G01N27/9033

    Abstract: A non-contact printed circuit board (PCB) electromagnetic testing system comprises at least one high resolution transducer operative to induce multi-frequency, multi-amplitude eddy currents in a tested PCB, each such transducer including both a high frequency excitation coil that serves also as a sensing coil and a direct current (DC) bias coil operative to provide an optimal transducer operating regime; a multi-frequency generator for providing AC and DC bias signals to each transducer; and a control mechanism for driving the transducer. Optionally, the system further comprises an external ferrite concentrator that enhances a magnetic field flux focus and depth of focus on the inspected PCB. The multi-frequency, multi-amplitude methods enable three-dimensional mapping of various features in the PCB with both high sensitivity and high resolution in respective operating regimes.

    Abstract translation: 非接触印刷电路板(PCB)电磁测试系统包括至少一个高分辨率传感器,其可操作用于在被测试的PCB中引入多频,多幅度涡流,每个这样的换能器包括同时服务的高频励磁线圈 作为感测线圈和可操作以提供最佳换能器操作状态的直流(DC)偏置线圈; 用于向每个换能器提供AC和DC偏置信号的多频发生器; 以及用于驱动换能器的控制机构。 可选地,该系统还包括外部铁氧体集中器,其增强被检查PCB上的磁场通量焦点和焦点深度。 多频,多幅度方法能够在各自的操作状态下对PCB中的各种特征进行三维映射,具有高灵敏度和高分辨率。

    APPARATUS AND METHODS FOR LOCKING RESONATING FREQUENCY OF A MINIATURE SYSTEM
    3.
    发明申请
    APPARATUS AND METHODS FOR LOCKING RESONATING FREQUENCY OF A MINIATURE SYSTEM 有权
    用于锁定微型系统的共振频率的装置和方法

    公开(公告)号:US20140218700A1

    公开(公告)日:2014-08-07

    申请号:US14342676

    申请日:2012-09-04

    Abstract: A resonance locking system for a pico-projector, the system comprising a resonance frequency sensor operative for sensing change in resonance frequency of a miniature mechanical device (10) including a moving mirror assembly having a driving frequency, by comparing a current resonance frequency to a reference; and a feedback loop changing at least one aspect of use of the miniature moving mirror assembly responsive to a current value of the resonance frequency measured by the sensor.

    Abstract translation: 一种用于微型投影仪的共振锁定系统,该系统包括谐振频率传感器,该谐振频率传感器用于通过将电流谐振频率与电流谐振频率进行比较来检测包括具有驱动频率的移动反射镜组件的微型机械装置(10)的谐振频率的变化 参考; 以及反馈回路,响应于由传感器测量的谐振频率的当前值,改变微型移动镜组件的使用的至少一个方面。

    Methods and devices for eddy current PCB inspection
    4.
    发明申请
    Methods and devices for eddy current PCB inspection 失效
    用于涡流PCB检测的方法和装置

    公开(公告)号:US20050104585A1

    公开(公告)日:2005-05-19

    申请号:US10705865

    申请日:2003-11-13

    CPC classification number: G01N27/9033

    Abstract: A non-contact printed circuit board (PCB) electromagnetic testing system comprises at least one high resolution transducer operative to induce multi-frequency, multi-amplitude eddy currents in a tested PCB, each such transducer including both a high frequency excitation coil that serves also as a sensing coil and a direct current (DC) bias coil operative to provide an optimal transducer operating regime; a multi-frequency generator for providing AC and DC bias signals to each transducer; and a control mechanism for driving the transducer. Optionally, the system further comprises an external ferrite concentrator that enhances a magnetic field flux focus and depth of focus on the inspected PCB. The mutli-frequesncy, multi-amplitude methods enable three-dimensional mapping of various features in the PCB with both high sensitivity and high resolution in respective operating regimes.

    Abstract translation: 非接触印刷电路板(PCB)电磁测试系统包括至少一个高分辨率传感器,其可操作用于在被测试的PCB中引入多频,多幅度涡流,每个这样的换能器包括同时服务的高频励磁线圈 作为感测线圈和可操作以提供最佳换能器操作状态的直流(DC)偏置线圈; 用于向每个换能器提供AC和DC偏置信号的多频发生器; 以及用于驱动换能器的控制机构。 可选地,该系统还包括外部铁氧体集中器,其增强被检查PCB上的磁场通量焦点和焦点深度。 多频多方法可以在各自的操作方式下对PCB中的各种特征进行三维映射,具有高灵敏度和高分辨率。

    Eye protection system wherein a low power laser controls a high power
laser
    5.
    发明授权
    Eye protection system wherein a low power laser controls a high power laser 失效
    眼保护系统,其中低功率激光器控制高功率激光

    公开(公告)号:US5837996A

    公开(公告)日:1998-11-17

    申请号:US887146

    申请日:1997-07-02

    Applicant: Eytan Keydar

    Inventor: Eytan Keydar

    CPC classification number: A61F9/022

    Abstract: A system for preventing damage to the eyes of a person being within a certain distance from a high-power laser, including a device for ascertaining the absence of a person within this range, and a device for actuating the high power laser only if the results indicate that no such person is present in the specified range. There is also provided a method for eye protection against damage by high-output lasers, which comprises examining such a range with a low power laser or other similar device, harmless to a person's eyes within the specific range, and for actuating high power laser radiation only after a clear indication that no person is present within the dangerous range.

    Abstract translation: 一种用于防止与大功率激光器在一定距离内的人的眼睛的损坏的系统,包括用于确定在该范围内不存在人的设备,以及仅在结果 表示该人不在指定范围内。 还提供了用于防止高输出激光器损伤的眼睛保护的方法,其包括用低功率激光器或其他类似装置检查这样的范围,在特定范围内对人的眼睛无害,并且用于致动大功率激光辐射 只有在明确指出,任何人不在危险范围之内。

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