Title:
【発明の名称】無線式液量測定装置
Document Type and Number:
Japanese Patent JP2859312
Kind Code:
B2
Abstract:
PURPOSE:To omit wiring work and to make it possible to measure a liquid level accurately by transmitting the liquid level and the temperature of a tank by radio, correcting the temperature of the liquid at the receiving side, and converting the data into the quantity of liquid. CONSTITUTION:A liquid-level/temperature transmitting device 1 which is attached to each underground tank 2 has a temperature detector 22 in the cabinet of the device 1. The liquid level data obtained through a liquid-level/temperature measuring means 20 and the temperature data in the cabinet from the detector 22 are converted into frequency signals through a control means 10 and a voltage/frequency converting means 24. Thereafter, the signal is superimposed on a radio-frequency carrier wave through a modulating and transmitting means 17. The signal is transmitted to a display and control device 3 in an office 4 at a remote site from the tank 2 by radio. In the device 3 which has received the signal, the signal is once stored in a storage means. Thereafter, data are read out. The liquid level is corrected with the temperature data in the cabinet based on the specified conversion data. Then, the corrected data are converted into the quantity of the liquid. The liquid quantity is corrected based on the temperature of the liquid and converted into the liquid quantity at reference temperature. The liquid level is displayed on a corresponding display device.
Inventors:
SHIMAMURA YOSHIO
KAWABE MASARU
SHIMIZU MAKOTO
KAWABE MASARU
SHIMIZU MAKOTO
Application Number:
JP20540389A
Publication Date:
February 17, 1999
Filing Date:
August 07, 1989
Export Citation:
Assignee:
TATSUNO MEKATORONIKUSU KK
International Classes:
G08C17/00; G01F23/00; (IPC1-7): G01F23/00; G08C17/00
Domestic Patent References:
| JP5961717A | ||||
| JP63210728A | ||||
| JP6189639U |
Attorney, Agent or Firm:
Katsuhiko Kimura (1 outside)