Title:
LIQUID LEVEL DETECTION DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2013/111847
Kind Code:
A1
Abstract:
Provided is a technology capable of reliably detecting a liquid level held in a container via only an analog process even when the liquid level is low due to boiling. A liquid level detection device comprises: a probe selection unit (31) for selecting from among a plurality of probes the probe that energizes a heater; an input unit for inputting the output of the temperature sensor of the probe selected by the probe selection unit (31) as is, as an analog temperature signal VA(k); a signal processing unit (34) for outputting a process signal VB(k) for the temperature signal VA(k) synchronously with the energizing of the heater; a computation unit (35) for outputting a result by calculating the temperature signal VA(k) and the process signal VB(k); a gas-liquid determination unit (37) for determining in which state of gas or liquid a detection point exists on the basis of the output result of the calculation; and a display unit (38) for displaying the determination result from the gas-liquid determination unit (37).
Inventors:
NISHIMURA KENTARO
NAGASE KATSUMOTO
SHIRAISHI FUJIO
TAKADA YUKA
NAGASE KATSUMOTO
SHIRAISHI FUJIO
TAKADA YUKA
Application Number:
PCT/JP2013/051560
Publication Date:
August 01, 2013
Filing Date:
January 25, 2013
Export Citation:
Assignee:
TOSHIBA KK (JP)
International Classes:
G01F23/22; G21C17/035; G21C19/07
Foreign References:
| JPS56114718A | 1981-09-09 | |||
| JP2005134230A | 2005-05-26 | |||
| JPS59107213A | 1984-06-21 | |||
| JPH01140134U | 1989-09-26 | |||
| JP2013007721A | 2013-01-10 | |||
| JPH10153681A | 1998-06-09 |
Other References:
See also references of EP 2808658A4
Attorney, Agent or Firm:
TOKYO INTERNATIONAL PATENT FIRM (JP)
Patent business corporation Tokyo international patent firm (JP)
Patent business corporation Tokyo international patent firm (JP)
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Claims: