JPS6150011A - Water detector - Google Patents
Water detectorInfo
- Publication number
- JPS6150011A JPS6150011A JP17286184A JP17286184A JPS6150011A JP S6150011 A JPS6150011 A JP S6150011A JP 17286184 A JP17286184 A JP 17286184A JP 17286184 A JP17286184 A JP 17286184A JP S6150011 A JPS6150011 A JP S6150011A
- Authority
- JP
- Japan
- Prior art keywords
- water
- resistor
- potential
- electrode
- diode
- 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.)
- Granted
Links
Classifications
-
- 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
- G01F23/24—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 resistance of resistors due to contact with conductor fluid
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は電極による水検知に関するものである。[Detailed description of the invention] Industrial applications The present invention relates to water sensing using electrodes.
従来例の構成とその問題点
従来安価な水検知装置として、２本の電極に交流電圧を
印加し、両電極間の電圧をＰＵＴで検出する方法かある
。その構成を第３図を用いて説明する。１は水検知電極
（以下水電極と称す）で、交流電源２と抵抗３を介して
接続されている。水電極１と抵抗３で分圧された電位は
抵抗４を介してＰＵＴ５のゲートＧに印加されている。Conventional Structure and Problems Conventionally, as an inexpensive water detection device, there is a method of applying an alternating current voltage to two electrodes and detecting the voltage between the two electrodes using a PUT. Its configuration will be explained using FIG. 3. Reference numeral 1 denotes a water detection electrode (hereinafter referred to as water electrode), which is connected to an AC power source 2 via a resistor 3. The potential divided by the water electrode 1 and the resistor 3 is applied to the gate G of the PUT 5 via the resistor 4.
またＰＵＴ５のアノードＡには交流電源２を抵抗６と抵
抗７．８そして逆電流防止ダイオード９で分圧した電位
が印加されている。ＰＵＴ５のアノードＡ電位を抵抗７
，８で分圧しトランジスタ１００ベース、エミッタ間に
印加し、コレクタは制御ンステム１１と接続されている
。Further, a potential obtained by dividing the AC power supply 2 by a resistor 6, a resistor 7.8, and a reverse current prevention diode 9 is applied to the anode A of the PUT 5. The anode A potential of PUT5 is connected to resistor 7.
, 8 and applied between the base and emitter of the transistor 100, and the collector is connected to the control system 11.
次に動作を説明すると、水が水電極１に触れない時、Ｐ
ＵＴ５のゲートＧに印加される電位は、交流電源２と同
じ振幅となり、アノードＡ電位はゲートＧ電位を越えな
いから、アノードＡ−カソードに間にはほとんど電流が
流れずトランジスタ１０ばＯＮし、水がないことを示し
ている。そして水が水電極１に触れると、ＰＵＴ５のゲ
ートＧ電位は抵抗３と水電極１間の水抵抗により分圧さ
れた電位となり、アノードＡ電位はゲー）Ｇ電位より高
くなり、アノードＡ−カソードに間は導通ずる。したが
って、アノードＡの電位はＯｖとなリトランジスタ１０
は○ＦＦＬ水があることを示す。そしてこの信号により
、制御ンステム１１は水の有無を検知する。Next, to explain the operation, when water does not touch water electrode 1, P
The potential applied to the gate G of the UT5 has the same amplitude as the AC power supply 2, and the anode A potential does not exceed the gate G potential, so almost no current flows between the anode A and the cathode, and the transistor 10 is turned on. It shows that there is no water. When water touches the water electrode 1, the gate G potential of the PUT 5 becomes a potential divided by the water resistance between the resistor 3 and the water electrode 1, and the anode A potential becomes higher than the anode A-cathode potential. There is continuity between the two. Therefore, the potential of the anode A is Ov, and the transistor 10
indicates that ○FFL water is present. Based on this signal, the control system 11 detects the presence or absence of water.
ここで、水が水電極１を満たしている時、第４図に示す
ようにＰＵＴ５のデー１−Ｇ−カソードに間（’１ＮＰ
Ｎｈランノスタのコレクターエミッタ間と等価となり、
入方向に電流か流れる時だけ抵抗４か水電極１と並列に
接続された状態となる。したがって水電極１間の電位か
下がり、第５図のように■＋と■−のバランスがくずれ
直流分ど
１の不の部域を越えるため陽極酸化を生じ、その結果電
極が腐食し始め長時間の使用で電極が消失してしまう。Here, when water fills the water electrode 1, as shown in FIG.
It is equivalent to the collector-emitter of Nh Lannosta,
Only when a current flows in the input direction, the resistor 4 is connected in parallel with the water electrode 1. Therefore, the potential between the water electrodes 1 decreases, and as shown in Figure 5, the balance between ■+ and ■- is disrupted, and the DC component exceeds the negative region of 1, causing anodic oxidation.As a result, the electrodes begin to corrode and become long. The electrodes will disappear over time.
したがって水があるにもかかわらす、水電極１間に電流
が流れなくなり、水検知動作ができなくなる。Therefore, even though water is present, no current flows between the water electrodes 1, making it impossible to detect water.
発明の目的
本発明は上記問題点に錨みてなしたもので、水ＴＪｉｌ
’Ｍの防食を目的としたものである。Purpose of the Invention The present invention has been made in view of the above-mentioned problems.
The purpose is to prevent corrosion of 'M.
発明の構成
本発明は上記目的を達成するため、水電極と並列にダイ
オード、抵抗を接続し、交流の不平衡分を相殺するよう
にしである。Structure of the Invention In order to achieve the above object, the present invention connects a diode and a resistor in parallel with the water electrode to cancel out the unbalanced component of the alternating current.
実施例の説明
以下その一実施例を第１図を用いて説明するが、上記従
来例と共通部分は同一番号を付記して説明は省略し、異
なる部分のみ説明すると、水電極１にはこれと並列にダ
イオード１２と抵抗１３との直列回路が接続しである。DESCRIPTION OF THE EMBODIMENTS One embodiment will be explained below using FIG. A series circuit consisting of a diode 12 and a resistor 13 is connected in parallel with .
ここでダイオード１２はカンードＫが抵抗３及び４側に
接続されている。Here, the diode 12 has a canard K connected to the resistors 3 and 4.
したかって、水電極１にかかる電圧がＶ＋の時は抵抗４
の並列接続で電位が下がるが、■−の時も抵抗１３の並
列接続で同様に電位が下がり、直流分ＶＤＣは、水電極
１の不働態域を越えない。Therefore, when the voltage applied to water electrode 1 is V+, resistance 4
The potential is lowered by the parallel connection of the resistors 13, but when the resistors 13 are connected in parallel, the potential is similarly lowered when the resistors 13 are connected in parallel, and the direct current component VDC does not exceed the passive region of the water electrode 1.
例えば、第２図は５ＵＳ３０４の不働態域の一例を示し
、この場合は前記直流分ＶＤＣかおよそ０．５ｖを越え
ると陽極酸化が始まり腐食してしまう。しかしながら本
発明によれば上記直流分ＶＤＣはＯ，ＳＶよりも極端に
小さいｏ■近くであるため長期間使用しても水電極１の
陽極酸化はおこらず、消耗しない。 、
発明の効果
このように本発明によれば、水電極にかかる直流電圧が
不働態域を越えるようなことがなくなり、したがって長
い年月の使用に対しても水電極の腐食は起こらなくなり
、長期間にわたって確実に水検知できる耐久性の高い水
検知装置となる。For example, FIG. 2 shows an example of the passive region of 5US304, and in this case, when the direct current component VDC exceeds about 0.5 V, anodic oxidation begins and corrosion occurs. However, according to the present invention, since the direct current component VDC is close to o, which is extremely smaller than O and SV, the water electrode 1 is not anodic oxidized and is not consumed even if it is used for a long period of time. , Effects of the Invention As described above, according to the present invention, the DC voltage applied to the water electrode will not exceed the passive state range, and therefore the water electrode will not be corroded even after many years of use. This is a highly durable water detection device that can reliably detect water over a period of time.
第１図は本発明の一実施例における水検知装置の回路図
、第２図は５ＵＳ３０４の不働態域を示すグラフ、第３
図は従来の水検知装置の回路図、第４図は同一部の部分
の等価回路図、第５図は同従来例の電圧の波形図である
。
１ ・・水検知電極、２・・・・・交流電源、３ ・抵
抗、５・ ・ＰＵＴ、１２・・ ダイオード、１３・抵
抗。
代理人の氏名 弁理士 中 尾 敏 男 はか１名第１
図
第２図
ｏ ｏ、ｓｖ
第３図
第４図
第５図
ゝＶ−FIG. 1 is a circuit diagram of a water detection device according to an embodiment of the present invention, FIG. 2 is a graph showing the passive state area of 5US304, and FIG.
The figure is a circuit diagram of a conventional water detection device, FIG. 4 is an equivalent circuit diagram of a portion of the same, and FIG. 5 is a voltage waveform diagram of the conventional example. 1... Water detection electrode, 2... AC power supply, 3... Resistor, 5... PUT, 12... Diode, 13... Resistor. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2 o o, sv Figure 3 Figure 4 Figure 5 ゝV-
Claims (2)
と直列接続された抵抗と、上記水検知電極と抵抗に交流
電圧を印加し発生する水検知電極間の電位をＰＵＴで検
出する水検知装置において、上記水検知電極間にＰＵＴ
と逆方向にダイオードと抵抗を接続したことを特徴とす
る水検知装置。(1) PUT detects the potential between two insulated water sensing electrodes, a resistor connected in series with the water sensing electrode, and the water sensing electrode generated by applying an AC voltage to the water sensing electrode and the resistor. In the water detection device, there is a PUT between the water detection electrodes.
A water detection device characterized by connecting a diode and a resistor in the opposite direction.
特許請求の範囲第１項記載の水検知装置。(2) The water detection device according to claim 1, wherein one side of the water detection electrode is a can body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17286184A JPS6150011A (en) | 1984-08-20 | 1984-08-20 | Water detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17286184A JPS6150011A (en) | 1984-08-20 | 1984-08-20 | Water detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6150011A true JPS6150011A (en) | 1986-03-12 |
| JPH028247B2 JPH028247B2 (en) | 1990-02-23 |
Family
ID=15949651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17286184A Granted JPS6150011A (en) | 1984-08-20 | 1984-08-20 | Water detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6150011A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032938A (en) * | 2010-11-11 | 2011-04-27 | 苏州合欣美电子科技有限公司 | Water flow detection circuit of ecological house |
-
1984
- 1984-08-20 JP JP17286184A patent/JPS6150011A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032938A (en) * | 2010-11-11 | 2011-04-27 | 苏州合欣美电子科技有限公司 | Water flow detection circuit of ecological house |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH028247B2 (en) | 1990-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR880013652A (en) | Arc welding power supply system for consumable electrode and its control method | |
| JPS6150011A (en) | Water detector | |
| JPH01204675A (en) | Method for informing liquid amount remaining in instillator container | |
| JPH0519387B2 (en) | ||
| JPS6029246A (en) | Contact sensor for electric discharge machine | |
| JPH0714463A (en) | Contact signal judging device | |
| JP3082110B2 (en) | Water detection circuit | |
| JPH0435010Y2 (en) | ||
| JPH0435714Y2 (en) | ||
| JPH048355Y2 (en) | ||
| JPH0351533B2 (en) | ||
| JPH02113180U (en) | ||
| JPH0726753Y2 (en) | Microcomputer signal input circuit | |
| JPS61171943U (en) | ||
| JP2655533B2 (en) | Sensor connection judgment circuit in constant potential electrolysis type gas measurement device | |
| JPS63201420A (en) | Flame detector | |
| JPH0473171B2 (en) | ||
| JPH052813U (en) | Power supply for electric discharge machine | |
| JPS601890Y2 (en) | Welding torch contact detection circuit | |
| JP2713424B2 (en) | Power failure detection circuit | |
| JPH0450502Y2 (en) | ||
| JPH0227522U (en) | ||
| JPS6324311A (en) | Temperature controller | |
| JPH0354766B2 (en) | ||
| JPS6118240B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |