Thermal movement sensor

Details Thermal movement sensor Thermal movement sensor

2007-03-06

2007-03-06

Raevis, Robert (Department: 2856)

Thermal measuring and testing

Distance or angle

Reexamination Certificate

active

10526052

ABSTRACT:
A transducer for detecting movement of an article mounted for movement in a plane, the transducer comprising: a heater facing the plane of movement of the article and having a temperature dependent resistance; and, an edge defined in the article between regions of different thermal conductivity; wherein, as the article describes the movement, the edge moves relative to the heater producing a corresponding variation in heat loss from the heater and a corresponding variation in resistance of the heater.

REFERENCES:
patent: 4468136 (1984-08-01), Murphy et al.
patent: 4747698 (1988-05-01), Wickramasinghe et al.
patent: 5527110 (1996-06-01), Abraham et al.
patent: 6004030 (1999-12-01), Abraham et al.
patent: 2004/0129093 (2004-07-01), Hauge
Abraham et al., “Thermal Proximity Imaging of Hard-Disk Substrates”, IEEE Transactions on Mathematic, vol. 36, No. 6, Nov. 2000.
“Thermal Proximity Imaging of Hard-Disk Substrates”, David W. Abraham, et al. IEEE Transactions on Mathematics, vol. 36, No. 6, Nov. 2000, p. 3997-4004.

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