JPS6139079B2 - - Google Patents
Info
- Publication number
- JPS6139079B2 JPS6139079B2 JP5168078A JP5168078A JPS6139079B2 JP S6139079 B2 JPS6139079 B2 JP S6139079B2 JP 5168078 A JP5168078 A JP 5168078A JP 5168078 A JP5168078 A JP 5168078A JP S6139079 B2 JPS6139079 B2 JP S6139079B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- led
- amount
- optical path
- ptr
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 claims description 17
- 238000005406 washing Methods 0.000 claims description 11
- 239000008237 rinsing water Substances 0.000 claims description 10
- 238000011109 contamination Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 101000821905 Homo sapiens Solute carrier family 15 member 4 Proteins 0.000 description 4
- 102100021484 Solute carrier family 15 member 4 Human genes 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 108091006595 SLC15A3 Proteins 0.000 description 3
- 102100021485 Solute carrier family 15 member 3 Human genes 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 101100407828 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) ptr-3 gene Proteins 0.000 description 2
- 101100351735 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) ptr-4 gene Proteins 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000013074 reference sample Substances 0.000 description 2
- 206010067482 No adverse event Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Description
【発明の詳細な説明】
本発明は、洗濯機のすすぎ水の汚れ度を効果的
に検知することのできるすすぎ検知装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rinse detection device that can effectively detect the degree of contamination of rinse water of a washing machine.
洗濯機の自動動作化が進められている昨今、す
すぎ水の汚れ度を検知することは節水等の諸問題
に対して重要な課題である。上記汚れ度を測定す
る装置としては、２組の発光受光素子対を用い、
一方の発光受光素子対で基準となる試料の光透過
度を測定し、他方の発光受光素子対で測定に供す
る試料の光透過度を測定する所謂ダブルビーム方
式によるものがある。しかしながらこの種の装置
では基準用の試料を必要とする上、受光信号の複
雑な演算処理を要する為に装置が大型化し、高価
なものとなつた。これが為に洗濯機の自動化に適
用するには問題があり、現状では予め定められた
時間に基づいて上記自動化を行つている。 Nowadays, automatic operation of washing machines is progressing, and detecting the degree of contamination of rinse water is an important issue for various issues such as water conservation. The device for measuring the degree of contamination uses two pairs of light-emitting and light-receiving elements,
There is a so-called double beam method in which one pair of light-emitting and receiving elements measures the light transmittance of a reference sample, and the other pair of light-emitting and receiving elements measures the light transmittance of the sample to be measured. However, this type of device requires a reference sample and requires complex arithmetic processing of the received light signal, making the device large and expensive. For this reason, there is a problem in applying it to automation of washing machines, and at present, the above automation is performed based on a predetermined time.
本発明は上記事情に鑑みてなされたもので、そ
の目的とするところは、簡易な構成にして洗濯す
すぎ水の汚れ度を効果的に検知することができ、
洗濯機の自動化に効果を奏すると共に、また節水
等の諸問題を解消できるすすぎ検知装置を実現
し、提供することにある。 The present invention has been made in view of the above circumstances, and its purpose is to effectively detect the degree of contamination of washing rinse water with a simple configuration.
An object of the present invention is to realize and provide a rinsing detection device that is effective in automating washing machines and can solve various problems such as water conservation.
以下図面を参照して本発明装置の一実施例を説
明する。 An embodiment of the apparatus of the present invention will be described below with reference to the drawings.
第１図は同装置の概略構成図で、ａは一部断面
図、ｂはａのＡ−Ａ断面図である。図中１は基台
で、透孔１ａに発光素子としての発光ダイオード
（LEDと略記する）２を挿入し、保持している。
また基台１の他端部側には透孔１ｂ，１ｃが穿か
れ、同透孔１ｂ，１ｃには受光素子としての２つ
のフオトトランジスタ（PTRと略記する）３，
４がそれぞれ挿入され、保持されている。この基
台１の上面、即ちLED２の発光面、及びPTR
３，４の受光面側には、例えばアクリル材からな
る透明板５が固着され、基台１の下部側を水密に
している。この水密にされた状態で本装置は、例
えば洗濯機の洗濯槽（図示せず）に取り付けられ
る。また、前記透明板５には、台形状に形成され
たアクリル材からなる光導波器６が取り付けられ
ている。この光導波器６は、光導入面６ａ、及び
光導出面６ｂ，６ｃを除く周面をアルミメツキ等
によりコーテイングされさらに防湿処理を施した
ものである。そして、同光導波器６は、前記光導
入面６ａをLED２に、光導出面６ｂ，６ｃを
PTR３，４にそれぞれ対向して配置されてい
る。しかして、LED２から発せられた光は、図
中一点鎖線で示すように光導波器６内を伝搬し、
台形部７，８によつてそれぞれ直角に反射され、
前記光導出面６ｂ，６ｃから放出されてPTR
３，４によりそれぞれ受光される。これらの光導
出面６ｂ，６ｃとPTR３，４の受光面、即ち透
明板５との間に例えばすすぎ水等の試料が介在さ
れる。尚、光導出面６ｂ，６ｃから透明板５まで
の間隔Lb，Lcは、LcがLbの1/3以下、ここでは
Lc＝５mm、Lb＝50mmになるように設定されてい
る。 FIG. 1 is a schematic configuration diagram of the same device, in which a is a partial cross-sectional view and b is a cross-sectional view taken along the line A-A of a. In the figure, reference numeral 1 denotes a base, into which a light emitting diode (abbreviated as LED) 2 as a light emitting element is inserted and held in a through hole 1a.
In addition, through holes 1b and 1c are bored at the other end of the base 1, and two phototransistors (abbreviated as PTR) 3, which serve as light receiving elements, are inserted into the through holes 1b and 1c.
4 are each inserted and retained. The upper surface of this base 1, that is, the light emitting surface of the LED 2, and the PTR
A transparent plate 5 made of, for example, an acrylic material is fixed to the light-receiving surface side of 3 and 4 to make the lower side of the base 1 watertight. In this watertight state, the device is attached to, for example, a washing tub (not shown) of a washing machine. Further, an optical waveguide 6 made of acrylic material and formed into a trapezoidal shape is attached to the transparent plate 5. This optical waveguide 6 has its circumferential surface, except for the light introduction surface 6a and the light output surfaces 6b and 6c, coated with aluminum plating or the like, and further subjected to moisture-proofing treatment. The optical waveguide 6 has the light introduction surface 6a connected to the LED 2 and the light output surfaces 6b and 6c connected to the LED 2.
They are arranged facing PTR3 and PTR4, respectively. Therefore, the light emitted from the LED 2 propagates within the optical waveguide 6 as shown by the dashed line in the figure.
reflected at right angles by the trapezoidal parts 7 and 8,
PTR is emitted from the light emitting surfaces 6b and 6c.
The light is received by 3 and 4, respectively. A sample such as rinsing water is interposed between these light emitting surfaces 6b, 6c and the light receiving surfaces of the PTRs 3, 4, that is, the transparent plate 5. Note that the distances Lb and Lc from the light emitting surfaces 6b and 6c to the transparent plate 5 are such that Lc is 1/3 or less of Lb, and here,
It is set so that Lc=5mm and Lb=50mm.
一方、前記LED２、及びPTR３，４は第２図
に示すように回路接続され、作動するようになつ
ている。PTR３はそのコレクタを電源＋Vcに接
続し、エミツタに負荷ＲLを接続している。そし
てLED２からの光を受光し、その受光量に相当
した電流を負荷ＲLに供給している。従つて負荷
ＲLには受光量に相当した、つまり前記すすぎ水
のにごり度に相当した電圧が生起され、出力され
る。またPTR４も、コレクタを電源＋Vcに接続
し、コレクタに負荷ｒLを接続しており、この負
荷に生起される電圧信号は誤差増幅器OPの反転
入力端に供給されている。またこの増幅器OPの
非反転入力端には電源＋Vcを抵抗R1，R2により
分圧した基準電圧が入力されている。従つて増幅
器OPは前記受光量を負帰還情報として入力し、
トランジスタTRを駆動して前記LED２の通電電
流、つまり発光量を制御している。尚、トランジ
スタTRは、コレクタをLED２を介して電源＋Vc
に接続し、エミツタを保護抵抗ｒを介して接地し
たものである。またPTR３は、測定用受光素子
として、PTR４は比較基準用受光素子として機
能するものである。 On the other hand, the LED 2 and PTRs 3 and 4 are connected in a circuit as shown in FIG. 2 and are activated. PTR3 has its collector connected to the power supply +Vc, and its emitter connected to the load R L. Then, it receives the light from the LED 2 and supplies a current corresponding to the amount of received light to the load R L. Therefore, a voltage corresponding to the amount of light received, that is, a voltage corresponding to the degree of turbidity of the rinsing water is generated in the load R L and output. PTR4 also has its collector connected to the power supply +Vc, and a load r L connected to the collector, and the voltage signal generated at this load is supplied to the inverting input terminal of the error amplifier OP. Further, a reference voltage obtained by dividing the power supply +Vc by resistors R 1 and R 2 is input to the non-inverting input terminal of this amplifier OP. Therefore, the amplifier OP inputs the amount of received light as negative feedback information,
The transistor TR is driven to control the current flowing through the LED 2, that is, the amount of light emitted. In addition, the collector of the transistor TR is connected to the power supply +Vc via LED2.
, and the emitter is grounded via a protective resistor r. Further, PTR3 functions as a light receiving element for measurement, and PTR4 functions as a light receiving element for comparison reference.
このように構成された本装置によれば、LED
２から発せられた光は試料としてのすすぎ水が介
在する測定用光路（光路長Lb）を介してPTR３
に受光されると共に、他方において、同じくすす
ぎ水が介在する比較基準用光路（光路長Lc）を
介してPTR４に受光される。そして、このPTR
４による受光情報に基づいてLED２の発光量が
負帰還制御され、一定に保たれる。このときの
PTR３による受光量がすすぎ水のにごり度とし
て測定され出力されることになる。またこのよう
な構成であれば、LED２が１つである為に光導
波器６における光導出面６ｂ，６ｃでの光強度が
等しく、例えば発光素子を２つ用いる場合のよう
なばらつきを生じることがない。しかも、比較基
準として用いるPTR４の光も、測定用の光と共
に試料としてのすすぎ水中を透過してくるので、
発光・受光面でのすすぎ水による汚れ等の受光条
件が均一化される。従つて、光透過面の汚れや
LED２の温度変化による発光量（発光強度）の
変化が極めて効果的に相殺される。またPTR
３，４の温度変化による特性変化も、同PTR
３，４を近接して配置しておくことにより均一化
がはかれ、その情報を以つてLED２の発光量を
制御する為、常に均一化された条件の基で測定を
行うことができる。しかもLED２の経年変化に
よる特性劣化に対しても同様に作用するので、そ
の悪影響が生じることはない。 According to this device configured in this way, the LED
The light emitted from PTR 3 passes through a measurement optical path (optical path length Lb) that includes rinsing water as a sample.
On the other hand, the light is received by the PTR 4 via a comparison reference optical path (optical path length Lc) in which rinsing water is also present. And this PTR
The amount of light emitted from the LED 2 is controlled by negative feedback based on the light reception information obtained by the LED 4, and is kept constant. At this time
The amount of light received by the PTR 3 is measured and output as the degree of turbidity of the rinse water. In addition, with this configuration, since there is only one LED 2, the light intensities at the light emitting surfaces 6b and 6c of the optical waveguide 6 are equal, and variations that occur when two light emitting elements are used, for example, are avoided. do not have. Furthermore, the PTR4 light used as a comparison standard also passes through the rinse water as a sample along with the measurement light.
Light-receiving conditions such as dirt caused by rinsing water on the light-emitting and light-receiving surfaces are made uniform. Therefore, dirt on the light transmitting surface and
Changes in the amount of light emitted (emission intensity) due to temperature changes of the LED 2 are offset extremely effectively. Also PTR
The characteristics change due to temperature change in 3 and 4 are also the same PTR.
By arranging LEDs 3 and 4 close to each other, uniformity is achieved, and this information is used to control the amount of light emitted from the LED 2, so measurements can always be performed under uniform conditions. Furthermore, since the same effect is applied to the deterioration of characteristics of the LED 2 due to aging, no adverse effects thereof will occur.
また前記の如くすすぎ水中の光路長Lb，Lcを
（Lb＞Lc）に設定したことは次のような理由によ
る。即ち測定に用いる光を単色光とし、Lbを介
した洗濯すすぎ水の透過率をTsとすると、Lcを
介した洗濯すすぎ水の透過率ＴRはランバートベ
ールの法則により次のように示される。 The reason why the optical path lengths Lb and Lc in the rinsing water are set to (Lb>Lc) as described above is as follows. That is, if the light used for measurement is monochromatic light and the transmittance of washing and rinsing water through Lb is Ts, the transmittance of washing and rinsing water through Lc is expressed as follows according to Lambert-Beer's law.
この式に示されるようにLe／Lbを適宜設定す
れば測定基準用としての受光量の変化（透過率の
変化）を極めて小さくすることができる。本発明
者らの実験によれば、Lbを介した透過率が10％
Ｔ変動しても、Lcを介した透過率は略80％Ｔ程
度で極めて安定であることが確認された。従つて
Lcを介して受光された光量が一定となるように
LED２の光量を制御し、このときにLbを介して
受光された光量から洗濯すすぎ水の汚れ度（透過
率）を極めて良好に検知することができる。 If Le/Lb is appropriately set as shown in this equation, the change in the amount of light received for measurement reference (change in transmittance) can be made extremely small. According to experiments conducted by the inventors, the transmittance through Lb is 10%.
It was confirmed that even when T fluctuates, the transmittance through Lc is approximately 80% T and is extremely stable. accordingly
So that the amount of light received through Lc is constant
By controlling the amount of light from the LED 2, the degree of contamination (transmittance) of the washing rinse water can be detected extremely well from the amount of light received via Lb at this time.
かくしてここに、極めて簡易な構成にて、汚れ
度を効果的に、且つ正確に測定することができ
た。 Thus, it was possible to effectively and accurately measure the degree of contamination with an extremely simple configuration.
なお本発明は上記実施例に限定されるものでは
ない。例えば光導波器６の形状、大きさ、その材
質等は仕様に応じて適宜定めればよいものであり
オプチカルフアイバを用いて構成してもよい。ま
たLED２の駆動や、PTR４による帰還制御も仕
様に応じて適宜行えばよい。また発光素子、及び
受光素子もLEDやPTRに限定されず、ランプや
太陽電池（CdS）等を用いるようにしてもよい。
以上要するに本発明はその要旨を逸脱しない範囲
で種々変形して実施することができる。 Note that the present invention is not limited to the above embodiments. For example, the shape, size, material, etc. of the optical waveguide 6 may be determined as appropriate according to specifications, and may be constructed using optical fiber. Further, driving of the LED 2 and feedback control using the PTR 4 may be performed as appropriate according to the specifications. Further, the light emitting element and the light receiving element are not limited to LEDs or PTRs, and lamps, solar cells (CdS), or the like may be used.
In summary, the present invention can be implemented with various modifications without departing from the gist thereof.
第１図は本発明装置の一実施例を示す概略構成
照、第２図は同装置の駆動電気回路構成図であ
る。
１……基台、２……発光素子（LED）、３……
受光素子（PTR：測定用）、４……受光素子
（PTR：比較基準用）、５……透明板、６……光
導波器。
FIG. 1 is a schematic diagram showing an embodiment of the device of the present invention, and FIG. 2 is a diagram showing the configuration of the driving electric circuit of the device. 1...Base, 2...Light emitting element (LED), 3...
Photo-receiving element (PTR: for measurement), 4... Photo-receiving element (PTR: for comparison reference), 5... Transparent plate, 6... Optical waveguide.
Claims (1)
れた光を洗濯すすぎ水中に設けた光路長の短い第
１の光路を介して受光する第１の受光素子および
上記第１の光路より長い光路長の光路を介して受
光する第２の受光素子と、前記第１の受光素子の
受光量が一定になるように前記発光素子の発光量
を制御する手段とを具備し、前記第２の受光素子
の受光量から前記すすぎ水の汚れ度を検知するよ
うにしたことを特徴とするすすぎ検知装置。1. One light-emitting element, a first light-receiving element that receives light emitted from this light-emitting element through a first optical path with a short optical path length provided in washing and rinsing water, and an optical path length longer than the first optical path. a second light-receiving element that receives light through an optical path; and means for controlling the amount of light emitted by the light-emitting element so that the amount of light received by the first light-receiving element is constant; A rinsing detection device characterized in that the degree of contamination of the rinsing water is detected from the amount of light received.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5168078A JPS54144046A (en) | 1978-04-28 | 1978-04-28 | Washing water turbidity detector |
| AU46240/79A AU523922B2 (en) | 1978-04-28 | 1979-04-19 | Apparatus for measuring the degree of rinsing |
| US06/031,738 US4257708A (en) | 1978-04-28 | 1979-04-20 | Apparatus for measuring the degree of rinsing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5168078A JPS54144046A (en) | 1978-04-28 | 1978-04-28 | Washing water turbidity detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54144046A JPS54144046A (en) | 1979-11-09 |
| JPS6139079B2 true JPS6139079B2 (en) | 1986-09-02 |
Family
ID=12893588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5168078A Granted JPS54144046A (en) | 1978-04-28 | 1978-04-28 | Washing water turbidity detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54144046A (en) |
-
1978
- 1978-04-28 JP JP5168078A patent/JPS54144046A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54144046A (en) | 1979-11-09 |
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