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Marking or scanning apparatus with a measuring device for measuring the speed of an object and a method of measuring the speed of an object with such a marking or scanning apparatus
Marking or scanning apparatus with a measuring device for measuring the speed of an object and a method of measuring the speed of an object with such a marking or scanning apparatus
The invention relates to a measuring device for measuring the speed of an object, comprising a transmitter having a transmitting fibre for transmitting a light to the object, a receiver having a first receiving fibre and a second receiving fibre for receiving light reflected from the object, wherein the reflected light received by the first receiving fibre forms a first light signal and the reflected light received by the second receiving fibre forms a second light signal, and a sensor and signal processor means for detecting the first and second light signals, for determining a time shift between the first light signal and the second light signal and for converting the determined time shift to a speed value of the object, wherein the transmitting fibre, the first receiving fibre and the second receiving fibre are arranged in a common ferrule.;The invention further relates to a method for measuring the speed of an object.
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