Title:
A METHOD FOR MEASURING LIQUID LEVEL IN LARGE OIL TANKS WITH ULTRASONIC WAVE
Document Type and Number:
WIPO Patent Application WO/2002/035190
Kind Code:
A1
Abstract:
A method for measuring liquid level in large oil tanks with ultrasonic wave, characterized in that a microcomputer sends a transmitter an instruction to launch ultrasonic pulse signals toward the liquid level under essential explosion proof conditions until a receiver receives an echo signal, the intensities of the ultrasonic pulse signals are increased from low to high or decreased from high to low. Compared to the prior art, the ultrasonic wave measuring liquid device according to the invention is capable of measuring liquid level in large oil tanks, whose explosion-proof level is iaIICT6, its accuracy excels 0.2% of the true distance, achieving a blind zone less than 15cm, and improving the degree of intelligentization and automation, and it is convenient to operate the device. It has been proved that the method according to the invention is a unique one that can measure liquid level in large oil tanks. However, prior ultrasonic wave measuring devices cannot measure the liquid level in large oil tanks.
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Inventors:
LU ZHI (CN)
LU SINING
LU SINING
Application Number:
PCT/CN2000/000745
Publication Date:
May 02, 2002
Filing Date:
December 29, 2000
Export Citation:
Assignee:
LU ZHI (CN)
International Classes:
G01F23/296; G01S7/524; G01S15/88; (IPC1-7): G01F23/296
Domestic Patent References:
| WO1997044641A1 | 1997-11-27 |
Foreign References:
| EP0262990A2 | 1988-04-06 | |||
| US4596144A | 1986-06-24 | |||
| CN1129322A | 1996-08-21 | |||
| CN1250154A | 2000-04-12 | |||
| CN2349557Y | 1999-11-17 |
Attorney, Agent or Firm:
LUNG TIN INTERNATIONAL PATENT & TRADEMARK AGENT LTD. (Tower B. Grand place No. 5 Huizhong Road
Chaoyang District, Beijing 1, CN)
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