JPS6128824A - 静電容量検出電極 - Google Patents

静電容量検出電極

Info

Publication number
JPS6128824A
JPS6128824A JP14924284A JP14924284A JPS6128824A JP S6128824 A JPS6128824 A JP S6128824A JP 14924284 A JP14924284 A JP 14924284A JP 14924284 A JP14924284 A JP 14924284A JP S6128824 A JPS6128824 A JP S6128824A
Authority
JP
Japan
Prior art keywords
electrode
measured
electrostatic capacity
detection
capacitance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14924284A
Other languages
English (en)
Inventor
Naoyuki Omatoi
大纏　直之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP14924284A priority Critical patent/JPS6128824A/ja
Publication of JPS6128824A publication Critical patent/JPS6128824A/ja
Priority to US07/011,509 priority patent/US4789822A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
    • G01D5/2405—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by varying dielectric
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/265—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/266—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/268—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors mounting arrangements of probes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/44—Modifications of instruments for temperature compensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2605—Measuring capacitance

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、差動形静電容量式の検出電極であって、ガラ
スや樹脂、ゴム等で製作されたチューブやパイプ等の中
の液面や２液の界面を、外部から隔壁を介して検出する
電極構造に関するものである。
（従来の技術） 従来、ホース等の内部における液体の有無を調べるには
、円筒型のセンサーヘッドをホース等に近づけて静電容
量を検出している。
（発明が解決しようとする問題点） この円筒型のセンサーヘッドを一安定的に取付けるため
には、特別に金具や装置を作らねばならす、その材質も
堅くて変形不可能であるため、ホース等に密着できず、
測定精度が悪かった。
従って本発明の目的は、平面から半円形まで自由に変形
可能であり、密着取付が容易であるため、測定に至便で
精度の向上が可能な静電容量検出電極を提供することで
ある。
（問題点を解決するための手段） 以下、添付図面中の参照符号を用いて説明すると、本発
明の静電容量検出電極は、被測定物体ｌの外面に沿って
変形可能な可撓性材料より成るものである。
（作用） この静゛マシ容量検出電極は、被測定物体１の外面に沿
って当接させ、該外面に倣って変形させた後、ベルト等
の適当な結着手段をその外側から施すことによって、被
測定物体１に固定される。
（実施例） 図示の実施例の静電容量検出電極は、検出電極部２、接
地電極部３及び補償電極部４という３枚のフレキシブル
電極板を各々フィルム７で絶縁して圧接し、これを塩化
ビニル等の軟質プラスチック材質のケース５に収容した
ものである。
このように形成された静電容量検出電極は、ベルト６等
で被測定物体５に締刊けられ、被測定物体７表面に倣っ
て密着する。そのため、被測定物体７内部の薬液の静電
容量の変化を正確に検出できる。
この静電容量検出電極は、直径１０ｍｍ位の輸血用チュ
ーブ等から直径５０〜６０ＣＩ１１位の塩化ビニル製の
プラント用配管等にも使用できる６前記電極部の材料と
しては、金属箔、金属網、金属の蒸着フィルム等が使用
できる。用途例としては、点滴ホースの点滴液検出、輸
血用ホースの血液検出、タンク液面検出、石油ストーブ
の石油液面検出、オイルホースの欠油検出、自動車の潤
滑油配管の油検出、注薬ホースの薬液検出等があげられ
る。
（発明の効果） 本発明の静電容量検出電極は、平面から半円形まで変形
可能な金属箔等の可撓性材料より成るので、静電容量検
出電極は被測定物体のイ、面に沿って密接させることが
できる。そのため、静電容量の検出を精度高く行なうこ
とができる。
また、この静電容量検出電極はベルト等の容易に入手及
び利用可能な補助手段によって、該被測定物体に安定に
保持させることができるので、特別の機械や器具類を準
備する必要がなく、使用上の取扱いに至便である。
現用の食品工業や薬品工業の機器や装置、プラント等の
非平面部分に対しても穴開は等の加工処理を施す必要な
く、簡単に着脱できるので、静電容量検出の適用範囲が
更に拡大され、測定対象物において制約がなくなる。
【図面の簡単な説明】
第１図は本発明の一実施例に係る静電容量検出電極を示
し、第２図は該静電容量検出電極の内部に収容された検
出電極部、接地電極部、補償電極　　　　（部及び絶縁
フィルムの分解斜視図、第３図は該静電容量検出電極を
ベルトでパイプに密着させた状態の斜視図である。 第４図は従来の円筒型センサーの測定状態の斜視図であ
る。 １・・・被測定物体、２・・・検出電極部、３・・・接
地電極部、４・・・補償電極部、５・・・ケース、６・
・・ベルト、７・・・絶縁フィルム、８・・・センサー
電子回路、９・・・検出面

Claims (1)

    【特許請求の範囲】
  1. 被測定物体の外面に沿って変形可能な可撓性材料より成
    る静電容量検出電極。
JP14924284A 1984-07-18 1984-07-18 静電容量検出電極 Pending JPS6128824A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP14924284A JPS6128824A (ja) 1984-07-18 1984-07-18 静電容量検出電極
US07/011,509 US4789822A (en) 1984-07-18 1987-02-06 Three-electrode sensor for phase comparison and pulse phase adjusting circuit for use with the sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14924284A JPS6128824A (ja) 1984-07-18 1984-07-18 静電容量検出電極

Publications (1)

Publication Number Publication Date
JPS6128824A true JPS6128824A (ja) 1986-02-08

Family

ID=15470986

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14924284A Pending JPS6128824A (ja) 1984-07-18 1984-07-18 静電容量検出電極

Country Status (1)

Country Link
JP (1) JPS6128824A (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6358112A (ja) * 1986-08-27 1988-03-12 Naoyuki Omatoi 位相比較測定用３極センサ−
EP1881307A3 (de) * 2006-07-18 2008-12-24 RAWE ELECTRONIC GmbH Füllstandssensor für Fluide und/oder Schüttgüter
JP2012002576A (ja) * 2010-06-15 2012-01-05 Aisan Ind Co Ltd 液位センサ
JP2013509896A (ja) * 2009-11-05 2013-03-21 メデラ ホールディング アーゲー ドレナージポンプユニット

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6358112A (ja) * 1986-08-27 1988-03-12 Naoyuki Omatoi 位相比較測定用３極センサ−
EP1881307A3 (de) * 2006-07-18 2008-12-24 RAWE ELECTRONIC GmbH Füllstandssensor für Fluide und/oder Schüttgüter
JP2013509896A (ja) * 2009-11-05 2013-03-21 メデラ ホールディング アーゲー ドレナージポンプユニット
JP2012002576A (ja) * 2010-06-15 2012-01-05 Aisan Ind Co Ltd 液位センサ

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