Title:
LAMINATED DIELECTRIC THICKNESS DETECTION DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2015/085892
Kind Code:
A1
Abstract:
A laminated dielectric thickness detection device, being able to improve the sensitivity of the entire laminated dielectric thickness detection device while eliminating the zero voltage impact, by disposing, before an A/D converter (23), an appropriately amplified subtraction amplification unit (28) used for eliminating the zero voltage impact of thickness voltage. The laminated dielectric thickness detection device comprises a thickness sensor (21), a position voltage conversion unit (22), an A/D converter (23) and a control processor (24) all sequentially connected, and further comprises a dielectric position detection unit (25), a timer unit (26), a D/A converter (27) and a subtraction amplification unit (28); the dielectric position detection unit (25) is connected to the control processor (24), and is used to detect whether a detected dielectric passes through; the timer unit (26) is connected to the control processor (24); two ends of the D/A converter (27) are respectively connected to the control processor (24) and the reverse phase input end of the subtraction amplification unit (28); and the normal phase input end, reverse phase input end and output end of the subtraction amplification unit (28) are respectively connected to the position voltage conversion unit (22), the D/A converter (27) and the A/D converter (23). Also provided is a laminated dielectric thickness detection method.
Inventors:
GAO PING (CN)
LI MING (CN)
LI MING (CN)
Application Number:
PCT/CN2014/093233
Publication Date:
June 18, 2015
Filing Date:
December 08, 2014
Export Citation:
Assignee:
INTELLICASH EQUIPMENT CO LTD (CN)
International Classes:
G07D7/16; G01B7/06
Domestic Patent References:
| WO1986000160A1 | 1986-01-03 |
Foreign References:
| CN103673961A | 2014-03-26 | |||
| CN102722933A | 2012-10-10 | |||
| CN101754919A | 2010-06-23 | |||
| CN103136842A | 2013-06-05 | |||
| CN102176262A | 2011-09-07 | |||
| CN102842166A | 2012-12-26 |
Other References:
See also references of EP 3081897A4
None
None
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
北京集佳知识产权代理有限公司 (CN)
北京集佳知识产权代理有限公司 (CN)
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