Title:
METHOD FOR PRECISELY AND RELIABLY CONTROLLING LIQUID LEVEL OF PRESSURE TANK WITH MULTIPLE SENSORS
Document Type and Number:
WIPO Patent Application WO/2011/111942
Kind Code:
A2
Abstract:
The present invention relates to a method for controlling the liquid level of a pressure tank in a piping system which comprises: a pressure tank; a first level sensor, a second level sensor and a third level sensor which independently measure the level of liquid of the pressure tank; a gas supply device for supplying gas to the pressure tank; a filling valve for filling the pressure tank with gas supplied from the gas supply device; and an exhaust valve for exhausting gas from the pressure tank. The method comprises the steps of: measuring the liquid level of the pressure tank by means of the respective level sensors; calculating the absolute values of difference values between liquid level measurement values of the pressure tank which are measured by the respective level sensors, and calculating a measurement deviation value between the respective level sensors; comparing the calculated measurement deviation value between the respective level sensors with a preset deviation value; determining whether or not an abnormality occurs in each level sensor depending on a result of the comparison between the measurement deviation value and the preset deviation value; outputting the average value of the measurement values which excludes measurement values from level sensors determined to have an abnormality and includes only values from the remaining level sensors, as a liquid level control reference value for the pressure tank; and comparing the outputted control reference value with a preset pressure tank liquid level reference value, determining whether the liquid level in the pressure tank is rising or falling, and then filling the pressure tank with gas or exhausting gas from the pressure tank depending on a result of the determination.
Inventors:
YANG, Jae Gu (1210-503 Guwol Hillstate, 23 Guwol-dong Namdong-gu, Incheon 405-220, 405-220, KR)
양재구 (인천광역시 남동구 구월동 23 구월힐스테이트 1210-503, 405-220 Incheon, 405-220, KR)
YANG, Ji Suk (1210-503 Guwol Hillstate, 23 Guwol-dong Namdong-gu, Incheon 405-220, 405-220, KR)
양지석 (인천광역시 남동구 구월동 23 구월힐스테이트 1210-503, 405-220 Incheon, 405-220, KR)
양재구 (인천광역시 남동구 구월동 23 구월힐스테이트 1210-503, 405-220 Incheon, 405-220, KR)
YANG, Ji Suk (1210-503 Guwol Hillstate, 23 Guwol-dong Namdong-gu, Incheon 405-220, 405-220, KR)
양지석 (인천광역시 남동구 구월동 23 구월힐스테이트 1210-503, 405-220 Incheon, 405-220, KR)
Application Number:
KR2011/001417
Publication Date:
September 15, 2011
Filing Date:
March 02, 2011
Export Citation:
Assignee:
FLOWTECH CO., LTD. (B-706 Woolim Lions Valley, 425 Cheongcheon-dong Bupyeong-gu, Incheon 403-030, 403-030, KR)
플로우테크 주식회사 (인천광역시 부평구 청천동 425 우림라이온스밸리 B-706, 403-030 Incheon, 403-030, KR)
YANG, Jae Gu (1210-503 Guwol Hillstate, 23 Guwol-dong Namdong-gu, Incheon 405-220, 405-220, KR)
양재구 (인천광역시 남동구 구월동 23 구월힐스테이트 1210-503, 405-220 Incheon, 405-220, KR)
YANG, Ji Suk (1210-503 Guwol Hillstate, 23 Guwol-dong Namdong-gu, Incheon 405-220, 405-220, KR)
플로우테크 주식회사 (인천광역시 부평구 청천동 425 우림라이온스밸리 B-706, 403-030 Incheon, 403-030, KR)
YANG, Jae Gu (1210-503 Guwol Hillstate, 23 Guwol-dong Namdong-gu, Incheon 405-220, 405-220, KR)
양재구 (인천광역시 남동구 구월동 23 구월힐스테이트 1210-503, 405-220 Incheon, 405-220, KR)
YANG, Ji Suk (1210-503 Guwol Hillstate, 23 Guwol-dong Namdong-gu, Incheon 405-220, 405-220, KR)
International Classes:
F16L55/045; F17C13/00; G01F23/00; G01F25/00
Attorney, Agent or Firm:
OH, Chang Suk (204 Dongsan Bldg, 972-1 Juan 6-dong Nam-gu, Incheon 402-848, 402-848, KR)
Claims:
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