| 摘要 |
A monitoring system and associated method are provided to determine various parameters, such as the speed and/or angle of motion, of an object. The monitoring system includes a phototransmitter for illuminating the space through which the object will pass. The monitoring system also includes a plurality of photoreceivers spaced apart from one another with each photoreceiver including a plurality of receiver elements. The monitoring system further includes a controller to analyze output signals provided by the receiver elements and to detect the object in relation to a respective photoreceiver based upon differences between the output signals provided by the receiver elements of the respective photoreceiver. The controller is also configured to determine a parameter associated with the flight of the object, such as the speed and/or angle of motion of the object, based upon detection of the object in relation to each of a plurality of the photoreceivers.
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