Device for determining the rotational speed of a rotating machine part using redundant sensors and evaluation circuits
A technology of rotating machines and sensors, applied in the field of measurement, can solve the problems of losing reliability of results, achieve high availability and improve reliability
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[0086] exist figure 1 A device 1 according to the invention for monitoring the number of revolutions of a rotating machine component 3 , in particular a turbine wheel, is shown in .
[0087] In order to detect the rotational speed signal of the rotating machine part 3 , three rotational speed sensors 9 are arranged on the wheel rim of the rotating machine part 3 , which sensors are arranged for example on the wheel rim and detect rotational marks or gear teeth during operation.
[0088] The output signal 11 of the rotational speed sensor 9 is connected in parallel with the signal input terminals 51 of the first component 5 and the second component 7, wherein the output signal 11 of one rotational speed sensor 9 is connected to the corresponding signal input terminals 51, 51, 71. The signal inputs 51 , 71 of the two components 5 , 7 are each connected to a computing unit 53 , 73 of the respective component 5 , 7 .
[0089] The speed of rotation of the rotary machine part 3 is...
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