Registers – Transfer mechanism – Traveling pawl
Patent
1975-09-23
1977-08-09
Gruber, Felix D.
Registers
Transfer mechanism
Traveling pawl
235181, 324175, 340 5S, 343 8, G01P 342, G06G 719
Patent
active
040412938
ABSTRACT:
Method and apparatus for measuring the velocity of an object relative to a reference by means of signals that are transmitted and received by transmitters and receivers fixed to the object at a certain geometric distance from each other in the direction of measurement, signals being transmitted by the object and being reflected by the reference. The receivers set up signals which correspond to the auto-correlation and cross-correlation of the received signals, the correlation signals being functions of the transmitter-receiver system geometry and being substantially independent of the reflection properties of the reference. The auto-correlation and cross-correlation signals are operated on to determine a time shift therebetween which is a function of the displacement of the object over a given period of time, the velocity of the object relative to the reference location being determined from said time shift.
REFERENCES:
patent: 3689157 (1972-09-01), Andermo
patent: 3777133 (1973-12-01), Beck et al.
patent: 3804517 (1974-04-01), Meyr et al.
patent: 3824015 (1974-07-01), Petit et al.
patent: 3885873 (1975-05-01), Andermo
patent: 3958242 (1976-05-01), Sirven
patent: 3974500 (1976-08-01), Goldfischer
Gruber Felix D.
Jungner Instrument AB
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