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1. 发明授权

US06927385B2 Optical sensor and method of suppressing interference light therefor 失效
标题翻译：光传感器及其干扰光的抑制方法
公开(公告)号：US06927385B2
公开(公告)日：2005-08-09
申请号：US10109567
申请日：2002-03-27
申请人： Hubert Adamietz , Yasunobu Sakai , Martin Schurer , Folke Ojemann , Jochen Betz , Gerold Stauss
发明人： Hubert Adamietz , Yasunobu Sakai , Martin Schurer , Folke Ojemann , Jochen Betz , Gerold Stauss
IPC分类号： G01D5/36 , G01D3/032 , G01V8/12 , H01J40/14
CPC分类号： G01D3/032 , G01V8/12
摘要： An optical sensor includes a light transmitter for transmitting pulsed light signals and a light receiver for receiving them. In order to suppress the effects of interfering noise light, the light signals are transmitted according to a specified pattern including pulses in packages separated from each other by a specified interval, the pulses within each of the packages following one another with a specified carrier frequency. Groups each including two or more such pulse packages may be employed. The light receiver converts a received light signal into an electrical signal and directly thereafter passes the electrical signal through a bandpass filter with a pass band including this carrier frequency. The light receiver may normalize received electrical pulses by suppressing those which are too low or narrow and uniformizing the width of those not suppressed, expand the pulses with the uniformized widths to improve accuracy of evaluation, integrate the expanded pulses and examine whether the integrated signal exceeds a specified threshold value.
摘要翻译：光学传感器包括用于传输脉冲光信号的光发射器和用于接收它们的光接收器。为了抑制干扰噪声光的影响，光信号根据包含彼此间隔一定间隔的包装中的脉冲的指定图案发送，每个包装内的脉冲具有指定的载波频率。可以采用包括两个或更多个这样的脉冲包的组。光接收器将接收到的光信号转换成电信号，并且直接通过具有包括该载波频率的通带的带通滤波器。光接收机可以通过抑制那些太低或较窄的并且使未被抑制的那些的宽度均匀化而使接收的电脉冲标准化，以均匀宽度扩大脉冲以提高评估的准确性，整合扩展的脉冲并检查积分信号是否超过指定的阈值。

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