Calibration system for a scanner-scale accounting for local acceleration due to gravity

    公开(公告)号:GB2461369A

    公开(公告)日:2010-01-06

    申请号:GB0908695

    申请日:2009-05-20

    Inventor: OLMSTEAD BRYAN L

    Abstract: The scale of a scanner-scale is automatically calibrated in its installed location via a calibration system mounted within the scanner-scale. This system comprises an accelerometer 30 which determines gravity calibration data, preferably by measuring the local acceleration due to gravity, and transfers that data to a processor 26 which uses the measurement to calibrate the scale 22 for the installed location. This allows the measurement of weight via the scale to be specifically adjusted for the installed location. The system may further comprise additional sensors 36, such as temperature 32 and humidity sensors, which provide additional information for use in calibrating the accelerometer and adjusting the calibration data. The system may be integrated into the scanner-scale, or disposed within a housing separate from it, communicating via a port of the scanner-scale.

    13.
    发明专利
    未知

    公开(公告)号:DE60140306D1

    公开(公告)日:2009-12-10

    申请号:DE60140306

    申请日:2001-08-24

    Inventor: ACOSTA JORGE L

    Abstract: A method of and a system for generating a dense pattern of scan lines. In a preferred configuration, a laser beam is directed into an inline beam dithering mechanism which dithers the beam over an angle parallel to the axis of rotation of the rotating facet wheel. The combination of the dithering mechanism and the scanning motion of the rotating facet wheel creates a dense scan pattern. Return light is retrodirectively collected by a collection element such as a collection lens onto a detector. A beam redirector such as a cone-shaped device having openings on both ends and a reflecting internal surface is disposed between the collection lens and the detector to redirect off-axis spot onto the detector. The system and method is applicable to both single and multiple beam systems and single and multiple window scanners.

    14.
    发明专利
    未知

    公开(公告)号:DE69941090D1

    公开(公告)日:2009-08-20

    申请号:DE69941090

    申请日:1999-09-13

    Abstract: A system and method for improving the accuracy of edge detection under high Inter-Symbol Interference, or ISI, conditions is disclosed. The amplified and filtered first derivative signal is offset by equal amounts in both directions to generate positive and negative offsets which serve as inputs to negative and positive peak detectors, respectively. The offset is determined by a fast adaptive peak detector provided by attenuating and AC-coupling the first derivative signal to the positive supply to drive a peak detector with a fairly short attack time, such that its output is nearly settled on the first peak of the first derivative signal, but having a decay time long enough to keep the threshold level approximately constant across the label. Peaks are qualified if the peak in question differs in amplitude from the previously qualified peak by the offset amount. Thus, peaks are qualified if their modulation depth exceeds a threshold, regardless of the absolute level of the peaks (such qualification strategy is referred to as modulation depth gating).

    17.
    发明专利
    未知

    公开(公告)号:DE60319809T2

    公开(公告)日:2009-04-23

    申请号:DE60319809

    申请日:2003-01-31

    Abstract: Methods of operation for data reader and security tag deactivation system whereby a data reader is equipped with EAS deactivation coils/modules disposed in the vicinity of the read volume or generally proximate thereto. System is operable to permit reading of the ID tag on an item, and upon a successful read, the deactivation unit is operable to (1) sense presence of an EAS tag; (2) if presence of EAS tag is sensed, energize the deactivation coil/module to deactivate the EAS tag; (3) sense if EAS tag is deactivated. If EAS tag is sensed to have been deactivated, the system signals and next item is scanned. Also, it may be operable to urge the operator to return an item to the read volume to enhance EAS tag deactivation, one method being by delaying good read acknowledgment until determining that the EAS tag which may have been previously detected has subsequently been deactivated.

    Zweiter Ordnung differenzierender Signalprozessor für einen Strichkodescanner sowie Signalverarbeitungsverfahren zum Verwenden von Strichkodescannern

    公开(公告)号:DE19882768B3

    公开(公告)日:2019-03-28

    申请号:DE19882768

    申请日:1998-10-15

    Abstract: Zweiter Ordnung differenzierender Signalprozessor für einen Strichkodescanner, wobei der zweiter Ordnung differenzierende Signalprozessor eingerichtet ist zum Erfassen von Strich- und Zwischenraum-Übergänge in einem Eingangssignal (220) darstellenden Rändern, wobei der zweiter Ordnung differenzierende Signalprozessor ein gesamtes Filterpolynom gerader Ordnung aufweist, das weiter aufweist:ein erstes Filter (104), welches das Eingangssignal (220) empfängt und ein gefiltertes Signal bereitstellt; einen ersten Ausgangskanal (126), der mit einem ersten Filter abschließt, welches ein komplexes Polpaar mit einer ersten Abschneidefrequenz und einem ersten Dämpfungsverhältnis aufweist, wobei der erste Ausgangskanal (126) das gefilterte Signal empfängt und die erste Ableitung (226) des Eingangssignals (220) erzeugt; undeinen zum ersten Ausgangskanal (126) parallelen zweiten Ausgangskanal (128), der mit einem zweiten Filter abschließt, welches ein komplexes Polpaar mit der ersten Abschneidefrequenz und dem ersten Dämpfungsverhältnis aufweist, wobei der zweite Ausgangskanal (128) das gefilterte Signal empfängt und die zweite Ableitung (228) des Eingangssignals (220) erzeugt;wobei das erste Filter (104) ein Tiefpaßfilter zweiter Ordnung ist und das zweite Filter ein Hochpaßfilter zweiter Ordnung ist; undwobei die Abschneidefrequenz und das Dämpfungsverhältnis des Tiefpaßfilters und des Hochpaßfilters im wesentlichen gleich sind.

    ADAPTIVE DATA READER AND METHOD OF OPERATING
    20.
    发明申请
    ADAPTIVE DATA READER AND METHOD OF OPERATING 审中-公开
    自适应数据读取器和操作方法

    公开(公告)号:WO2012005809A1

    公开(公告)日:2012-01-12

    申请号:PCT/US2011/036295

    申请日:2011-05-12

    Abstract: Disclosed systems (10) and methods preferably capture one or more images of an item (32) bearing an optical code (31) and analyze such images to determine whether the item (32) has a highly, or relatively highly, reflective surface (30) or not. Based on such a determination, operating parameters of the system (10), such as the gain, exposure time, and amount of illumination, are preferably automatically adjusted by the system (10) to capture a subsequent image of the item (32) where the subsequent image has sufficient contrast to decode the optical code (31). The subsequent image may include a plurality of images, and different operating parameters may be used to capture several, or each, of the plurality of images based on the determination of whether the item (32) has a highly, or relatively highly, reflective surface (30) or not.

    Abstract translation: 公开的系统(10)和方法优选地捕获携带光学代码(31)的物品(32)的一个或多个图像,并分析这些图像以确定物品(32)是否具有高度或相对高度的反射表面(30 ) 或不。 基于这样的确定,系统(10)的操作参数(诸如增益,曝光时间和照明量)优选地由系统(10)自动调整以捕获物品(32)的后续图像,其中 随后的图像具有足够的对比度来解码光学代码(31)。 随后的图像可以包括多个图像,并且可以使用不同的操作参数来基于物品(32)是否具有高度或相对高度的反射表面的确定来捕获多个图像中的几个或每个图像 (30)。

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