Title:
【発明の名称】液面検知装置
Document Type and Number:
Japanese Patent JP2797100
Kind Code:
B2
Abstract:
PURPOSE:To improve reliability by making the nozzle part itself of a dispensing probe which is provided above the housing container of liquid, moves up and down and sucks the liquid a liquid level detecting sensor for detecting the electrostatic capacities of air and liquid in the housing container. CONSTITUTION:The dispensing probe 3 itself is also used as the liquid level detecting sensors 3a and 3b. A detection signal transmission circuit 11 detects both electrostatic capacities of the liquid (a) and the air (b) in the housing container 1 by using the sensors 3a and 3b and outputs a detection signal 11a. The signal 11a is cleared by means of a filter 12 and inputted in an arithmetic processing circuit 15. A basic clock signal 13a outputted from a basic clock transmission circuit 13 is inputted in the circuit 15. Various kinds of data on the air (b) and the liquid (a) in the container 1 are previously inputted in a liquid level setting circuit 14 and a data signal 14a for judging the liquid level is inputted in the circuit 15. The signal 11a is compared with the signal 13a in the circuit 15 and the wavelength l of the signal 11a is calculated as the number (n) of clocks of the signal 13a, which is compared with the signals 14a. Then, a liquid level detection signal 15a is outputted to be displayed 16.
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Inventors:
Fukuda Morishoma
Application Number:
JP18552988A
Publication Date:
September 17, 1998
Filing Date:
July 27, 1988
Export Citation:
Assignee:
Nippon Tektron Co., Ltd.
International Classes:
G01N35/10; G01F23/26; (IPC1-7): G01F23/26
Domestic Patent References:
| JP63111425A |
Attorney, Agent or Firm:
Okabe Tadashi