Proximity sensor for X-ray apparatus

Details Proximity sensor for X-ray apparatus Proximity sensor for X-ray apparatus

2005-08-26

2009-06-16

Dole, Timothy J (Department: 2831)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S662000, C324S658000, C378S189000

Reexamination Certificate

active

07548075

ABSTRACT:
A capacitive proximity sensor comprising an emitter electrode (104) capacitively coupled to receive an electrode (102). A first active guard electrode (110), driven by the output of a unity gain amplifier (108), is provided in respect of the receive electrode (102), to shield parts thereof not facing a potential obstacle (122), and a grounded shield (126) is provided in respect of the emitter electrode (104) to shield parts thereof not facing a potential obstacle (122). A second active guard electrode (103) is provided between the emitter and receiver electrodes (104, 102), just behind the cover (106), which is also driven by the output of the amplifier (108). The second active guard electrode (103) acts to block shortened electric field lines (124) between the emitter and receiver electrodes (104, 102), thereby improving accuracy and reliability of the sensor.

REFERENCES:
patent: 3826979 (1974-07-01), Steinmann
patent: 5801340 (1998-09-01), Peter
patent: 5973318 (1999-10-01), Plesko
patent: 6081073 (2000-06-01), Salam et al.
patent: 6249130 (2001-06-01), Greer
patent: 7098674 (2006-08-01), Stanley et al.
patent: 2002/0000960 (2002-01-01), Yoshihara et al.
patent: 2002/0057238 (2002-05-01), Nitta et al.
patent: 2003/0016205 (2003-01-01), Mawabata et al.
patent: 2003/0080755 (2003-05-01), Kobayashi
patent: 2003/0122771 (2003-07-01), Sumiyoshi et al.
patent: 2004/0041756 (2004-03-01), Henmi et al.
patent: 2006/0097734 (2006-05-01), Roziere
patent: 2007/0242805 (2007-10-01), Somers
patent: 4006119 (1991-08-01), None
patent: 4006119 (1991-08-01), None
patent: 0518836 (1992-12-01), None
patent: 0564164 (1993-10-01), None
patent: 564164 (1993-10-01), None
patent: 0753438 (1997-01-01), None
patent: 518836 (2003-08-01), None
patent: 2809132 (2001-11-01), None
patent: 2378344 (2003-02-01), None
patent: 03077013 (2003-09-01), None

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