公开(公告)号：EP0249871B1

公开(公告)日：1995-04-26

申请号：EP87108383.8

申请日：1987-06-10

申请人： IDAB INCORPORATED

发明人： Watts, Leonard A. ,  Johnson, William A. ,  Sawabini, Charles E.

IPC分类号： G06M7/00 ,  G06M7/10 ,  G06M7/06

CPC分类号： G06M7/00

公开(公告)号：EP0249871A3

公开(公告)日：1989-12-27

申请号：EP87108383.8

申请日：1987-06-10

申请人： IDAB INCORPORATED

发明人： Watts, Leonard A. ,  Johnson, William A. ,  Sawabini, Charles E.

IPC分类号： G06M7/00 ,  G06M7/10 ,  G06M7/06

CPC分类号： G06M7/00

摘要： Articles, moving along a delivery path, are counted by directing a stream of pressurized air toward one major surface of the passing articles, the direction of the air stream being transverse to the direction of travel. Sensors arranged about the air stream detect the acoustic signal which varies with changes in the profile of the passing articles, exemplified by signa­tures. The detected acoustic signal is divided into a plurali­ty of frequency ranges which, in one preferred embodiment are averaged to reduce the effect of noise which may be present in only limited ones of the frequency bands. The averaged signals are then compared against the aforesaid thresholds to determine the instantaneous state of the articles, exemplified by a signa­ture stream to generate count signals.

公开(公告)号：EP0249871A2

公开(公告)日：1987-12-23

申请号：EP87108383.8

申请日：1987-06-10

申请人： IDAB INCORPORATED

发明人： Watts, Leonard A. ,  Johnson, William A. ,  Sawabini, Charles E.

IPC分类号： G06M7/00 ,  G06M7/10 ,  G06M7/06

CPC分类号： G06M7/00

摘要： Articles, moving along a delivery path, are counted by directing a stream of pressurized air toward one major surface of the passing articles, the direction of the air stream being transverse to the direction of travel. Sensors arranged about the air stream detect the acoustic signal which varies with changes in the profile of the passing articles, exemplified by signa­tures. The detected acoustic signal is divided into a plurali­ty of frequency ranges which, in one preferred embodiment are averaged to reduce the effect of noise which may be present in only limited ones of the frequency bands. The averaged signals are then compared against the aforesaid thresholds to determine the instantaneous state of the articles, exemplified by a signa­ture stream to generate count signals.

摘要翻译： 沿着输送路径移动的物品通过将加压空气流引导到通过物品的一个主表面来计数，空气流的方向横向于行进方向。 围绕空气流布置的传感器检测随着通过物品的轮廓的变化而变化的声信号，以签名为例。 检测到的声信号被分成多个频率范围，在一个优选实施例中，它们被平均以减小可能存在于仅有限频带中的噪声的影响。 然后将平均信号与上述阈值进行比较，以确定物品的瞬时状态，例如用于生成计数信号的签名流。