公开(公告)号：US06651889B2

公开(公告)日：2003-11-25

申请号：US10217720

申请日：2002-08-13

申请人： William Martin Belknap ,  John Baird Keys

发明人： William Martin Belknap ,  John Baird Keys

IPC分类号： G06K710

CPC分类号： G06K7/10623

摘要： Techniques for determining a position for a rotating optical element, or spinner, of a bar code scanner are described. A diffractive element is positioned so as to be struck by a laser beam produced by a laser source and reflected from the spinner when the spinner is in a reference position. The diffractive element diffracts the reflected beam to produce a diffracted line which strikes a reference position photodetector, thereby causing the reference position photodetector to produce a reference position photosignal. The reference position photosignal can be read by a controller to determine when the spinner is in the reference position, and the position of a Hall sensor can be read at the same time in order to calibrate the reading of the Hall sensor with the reference position. Thereafter, the reading of the Hall sensor can be used to provide accurate position information for the sensor and the position information can be used to control activation and deactivation of the laser source when the spinner is in appropriate positions to produce a desired scan pattern.

公开(公告)号：US06702183B2

公开(公告)日：2004-03-09

申请号：US09836837

申请日：2001-04-17

申请人： David Lee Gregerson ,  Frank Stanley Hannah ,  William Martin Belknap ,  James Brian McCord

发明人： David Lee Gregerson ,  Frank Stanley Hannah ,  William Martin Belknap ,  James Brian McCord

IPC分类号： G06K710

CPC分类号： G06K7/10851 ,  G06K7/10584

摘要： Methods and apparatus for switching between scan patterns produced by a barcode scanner and for switching between allowing and inhibiting decoding of barcodes are disclosed. Depending on the position of a multiposition switch controlled by an operator, the scanner produces an omnidirectional scan pattern and immediately decodes barcodes falling within the field of view of the scanner, produces a single line scan pattern but inhibits decoding of barcodes until the switch is moved to a position to select allowing decoding of barcodes, or produces a single line scan pattern and immediately decodes barcodes falling within the field of view of the scanner. If the scanner has been set to decode barcodes using a single line scan pattern, a delay is imposed between the time the switch is set to select producing an omnidirectional scan pattern and the time at which the scanner begins to produce the omnidirectional scan pattern.

摘要翻译： 公开了用于切换由条形码扫描器产生的扫描图案和用于允许和禁止条形码解码之间切换的方法和装置。 根据由操作者控制的多位置开关的位置，扫描器产生全向扫描图案，并立即解码落在扫描仪视野内的条形码，产生单行扫描图案，但禁止条形码解码，直到开关移动 到允许对条形码进行解码的位置，或产生单行扫描图案，并立即解码落在扫描仪的视野内的条形码。 如果扫描仪被设置为使用单行扫描图案来解码条形码，则在开关设置为选择产生全向扫描图案的时间与扫描器开始产生全向扫描图案的时间之间施加延迟。

公开(公告)号：US06454169B1

公开(公告)日：2002-09-24

申请号：US09878705

申请日：2001-06-11

申请人： William Martin Belknap ,  John Baird Keys

发明人： William Martin Belknap ,  John Baird Keys

IPC分类号： G06K710

CPC分类号： G06K7/10623

摘要： Techniques for determining a position for a rotating optical element, or spinner, of a bar code scanner are described. A diffractive element is positioned so as to be struck by a laser beam produced by a laser source and reflected from the spinner when the spinner is in a reference position. The diffractive element diffracts the reflected beam to produce a diffracted line which strikes a reference position photodetector, thereby causing the reference position photodetector to produce a reference position photosignal. The reference position photosignal can be read by a controller to determine when the spinner is in the reference position, and the position of a Hall sensor can be read at the same time in order to calibrate the reading of the Hall sensor with the reference position. Thereafter, the reading of the Hall sensor can be used to provide accurate position information for the sensor and the position information can be used to control activation and deactivation of the laser source when the spinner is in appropriate positions to produce a desired scan pattern.

摘要翻译： 描述了用于确定条形码扫描器的旋转光学元件或旋转器的位置的技术。 衍射元件定位成当旋转器处于参考位置时由激光源产生的激光束和从旋转器反射而被撞击。 衍射元件衍射反射光束，产生与参考点光电检测器相撞的衍射线，从而使基准位置光电检测器产生参考位置光信号。 控制器可以读取参考位置光信号，以确定微调器何时处于参考位置，并且可以同时读取霍尔传感器的位置，以便校准具有参考位置的霍尔传感器的读数。 此后，可以使用霍尔传感器的读取来为传感器提供精确的位置信息，并且当旋转器处于适当的位置以产生期望的扫描图案时，可以使用位置信息来控制激光源的激活和去激活。