| 摘要 |
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. |
