JP2722654B2 - Washing machine control device - Google Patents
Washing machine control deviceInfo
- Publication number
- JP2722654B2 JP2722654B2 JP1102653A JP10265389A JP2722654B2 JP 2722654 B2 JP2722654 B2 JP 2722654B2 JP 1102653 A JP1102653 A JP 1102653A JP 10265389 A JP10265389 A JP 10265389A JP 2722654 B2 JP2722654 B2 JP 2722654B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- emitting element
- receiving element
- light receiving
- light
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 産業上の利用分野 本発明は槽内の濁度を検出して洗濯運転の制御を行な
う洗濯機の制御装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a washing machine that detects a turbidity in a tub and controls a washing operation.
従来の技術 従来より、発光素子と受光素子とにより洗濯液の濁度
を検出して、その濁度に応じて洗濯時間及びすすぎ時間
を設定する方法が提案されている。そして、前述の受光
素子からの出力を洗濯開始初期において初期値設定して
受発光素子のバラツキを補正していた。この初期値設定
方法としては、発光素子の制御電流をＯから順次大きく
していき、受光素子の出力信号が所定値範囲内に達した
時点で、初期値設定完了としていた。2. Description of the Related Art Conventionally, there has been proposed a method of detecting turbidity of a washing liquid using a light emitting element and a light receiving element, and setting a washing time and a rinsing time according to the turbidity. Then, the output from the light receiving element is set to an initial value at the beginning of washing to correct the variation of the light receiving and emitting element. In this initial value setting method, the control current of the light emitting element is sequentially increased from O, and the initial value setting is completed when the output signal of the light receiving element reaches within a predetermined value range.
発明が解決しようとする課題 しかしながら、このような方法では受光素子及び発光
素子の表面の汚れなどによる経年変化による生じた特性
のバラツキによって、受光素子の出力信号が所定値に達
するまでの時間が長くなるという課題を有していた。こ
のような課題が生ずることにより、受光素子及び発光素
子間の光の透過度が安定するときが短い、洗濯開始時や
すすぎ時に設定を行なおうとする場合なかなか値が安定
しないという不都合が生ずる。SUMMARY OF THE INVENTION However, in such a method, the time required for the output signal of the light receiving element to reach a predetermined value is long due to variations in characteristics caused by aging due to contamination of the surface of the light receiving element and the light emitting element. Had the problem of becoming When such a problem occurs, there are disadvantages that the time when light transmittance between the light receiving element and the light emitting element is stable is short, and the value is not stable when setting is attempted at the start of washing or at the time of rinsing.
本発明は上記課題に鑑み、初期値設定時間を短縮する
ことを目的とする。The present invention has been made in view of the above problems, and has as its object to reduce the initial value setting time.
課題を解決するための手段 上記目的を達成するために本発明は、発光素子と受光
素子とにより槽内の液の濁度変化を検出する濁度検出器
と、前記発光素子への制御電流を変化させる電流制御回
路と、前記受光素子の出力信号が所定範囲内になるよう
前記電流制御回路により電流を可変する制御手段とを有
し、前記制御手段は、微少電流を前記発光素子に流し、
このときの受光素子の出力信号に基づいて、発光素子へ
の電流の値を予測し、予測した値の電流を増減させて、
受光素子の出力信号が、所定の範囲にはいるようにした
ものである。Means for Solving the Problems In order to achieve the above object, the present invention provides a turbidity detector that detects a change in turbidity of a liquid in a tank using a light emitting element and a light receiving element, and a control current to the light emitting element. A current control circuit for changing, and control means for varying the current by the current control circuit so that the output signal of the light receiving element falls within a predetermined range, the control means flowing a small current to the light emitting element,
Based on the output signal of the light receiving element at this time, the value of the current to the light emitting element is predicted, and the current of the predicted value is increased or decreased,
The output signal of the light receiving element is set to fall within a predetermined range.
作用 本発明の洗濯機の制御装置は、上記構成により、受光
素子や発光素子の表面に経年変化による汚れが付着して
特性にバラツキが生じても、そのバラツキに応じて発光
素子に流すべき電流を予測し、その予測した電柱値を実
際に発光素子に流すことにより、受光素子の出力を確認
しながら受光素子の出力が所定の範囲に収まるよう制御
電流を増減させ、微調整を行うようにする。これにより
受発光素子の初期値設定が予測と微調整の２ステップで
行うことができるようになり、初期値設定時間が短時間
で行うことができるようになったものである。Effect of the Invention The washing machine control device according to the present invention has the above-described configuration. Even if the surface of the light receiving element or the light emitting element is stained due to aging and the characteristics are varied, the current to be supplied to the light emitting element according to the variation. By predicting the power pole value to the light emitting element, the control current is increased or decreased so that the output of the light receiving element falls within a predetermined range while checking the output of the light receiving element, and fine adjustment is performed. I do. As a result, the initial value setting of the light emitting / receiving element can be performed in two steps of prediction and fine adjustment, and the initial value setting time can be performed in a short time.
実施例 以下、本発明の一実施例を添付図面にもとづいて説明
する。第１図は本発明の全自動洗濯機の概略構成図であ
り、１は固定式洗濯外槽、２は洗濯液、３は内槽で壁面
に多数の穴を有している。４はパルセータで、内槽３の
内底部に配置されている。５は洗濯液２を排水弁６を通
じて排水するための排水管で、外槽１の底部に接続され
ている。７はこの排水管５に設置された発光素子であ
り、８はこの発光素子７に対峙させて設置された受光素
子であり、この発光素子７と受光素子８により濁度検出
器を構成している。９はパルセータ４用のモータ、10は
モータ制御部である。11はマイクロコンピュータからな
る全自動洗濯機の制御手段であり、その出力端子とし
て、パルスを出力すると共にそのパルスのデューティ比
が変化可能なパルス出力端子（PWM端子）を有してい
る。このPWM信号を入力し、D/A変換するD/A回路12と、
このD/A回路12の出力電圧を入力し、その電圧値に応じ
た定電流を発光素子７に流す定電流回路13とからなり、
このD/A回路12と定電流回路13とから発光素子７への制
御電流を線形的に変化させる電流制御回路を構成してい
る。14は受光素子８の出力信号を電圧変換する電圧変換
回路であり、その出力電圧はマイクロコンピュータ11の
A/D入力端子に入力されている。Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic structural view of a fully automatic washing machine according to the present invention, wherein 1 is a fixed washing outer tub, 2 is a washing liquid, and 3 is an inner tub having many holes in a wall surface. Reference numeral 4 denotes a pulsator, which is arranged on the inner bottom of the inner tank 3. Reference numeral 5 denotes a drain pipe for draining the washing liquid 2 through a drain valve 6, which is connected to the bottom of the outer tub 1. Reference numeral 7 denotes a light-emitting element provided in the drain pipe 5, and reference numeral 8 denotes a light-receiving element provided to face the light-emitting element 7. The light-emitting element 7 and the light-receiving element 8 constitute a turbidity detector. I have. 9 is a motor for the pulsator 4 and 10 is a motor control unit. Numeral 11 denotes a control means of a fully automatic washing machine comprising a microcomputer, which has a pulse output terminal (PWM terminal) which outputs a pulse and whose duty ratio can be changed as an output terminal. A D / A circuit 12 that receives the PWM signal and performs D / A conversion,
A constant current circuit 13 to which an output voltage of the D / A circuit 12 is input and a constant current corresponding to the voltage value is supplied to the light emitting element 7;
The D / A circuit 12 and the constant current circuit 13 constitute a current control circuit that linearly changes the control current to the light emitting element 7. A voltage conversion circuit 14 converts the output signal of the light receiving element 8 into a voltage.
Input to the A / D input terminal.
マイクロコンピュータ11のPWM端子の出力信号波形は
第２図に示すように、周期Ｔは一定であり、ハイレベル
のパルス幅tHが変化することにより、デューティ比が変
化するものである。このPWM端子の出力信号をD/A回路12
と定電流回路13とにより、発光素子７の制御電流IFを第
３図に示すように線形的に変化させる。この制御電流IF
の分解能は、28＝256とし、IFの最大値を100mAとする
と、100mA/28≒0.4mAとなる。また、発光素子７と受光
素子８からなる濁度検出器の伝達特性は、第４図に示す
ように、伝達特性が良いものと、悪いものとがある。ま
た。洗濯機を使用していくに従い、排水管５が汚れてく
るため、等価的に伝達特性が劣化してくることが考えら
れる。ここで、マイクロコンピュータ11は、洗濯開始初
期にこの濁度検出器の受光素子８の出力信号を電圧変換
回路14を経てA/D入力端子に入力し、この入力電圧VOが
所定値になるように、発光素子７の制御電流IFを決定
し、その後受光素子８の出力信号の変化度合から、洗濯
やすすぎの終了判定を行なうように制御するものであ
る。As shown in FIG. 2, the output signal waveform of the PWM terminal of the microcomputer 11 has a constant period T, and the duty ratio changes as the high-level pulse width t H changes. The output signal of this PWM pin is
And by the constant current circuit 13, linearly varied to show the control current I F of the light-emitting element 7 in Figure 3. This control current IF
The resolution, and 2 8 = 256, and the maximum value of I F and 100 mA, a 100 mA / 2 8 ≒ 0.4 mA. The transfer characteristics of the turbidity detector including the light-emitting element 7 and the light-receiving element 8 have good and bad transfer characteristics as shown in FIG. Also. As the washing machine is used, the drain pipe 5 becomes dirty, so that it is considered that the transfer characteristics are equivalently deteriorated. Here, the microcomputer 11 inputs the output signal of the light receiving element 8 of the turbidity detector to the A / D input terminal via the voltage conversion circuit 14 at the beginning of the washing, and the input voltage V O becomes a predetermined value. as described above, to determine the control current I F of the light-emitting element 7, in which the degree of change in the subsequent output signal of the light receiving element 8, is controlled to perform end determination washing and rinsing.
ここで、マイクロコンピュータ11が、濁度検出器の受
光素子８の出力電圧VOをVAになるように発光素子７の制
御電流IFを決定する方法を、第４図，第５図，第６図に
もとづいて説明する。Here, the microcomputer 11, a method for the output voltage V O of the light receiving element 8 turbidity detector to determine the control current I F of the light emitting element 7 so as to V A, Fig. 4, FIG. 5, This will be described with reference to FIG.
マイクロコンピュータ11は、最初に微少電流5mAを発
光素子７を流し、このときの受光素子８の出力電圧VOを
A/D入力より入力する。このとき第４図に示すように濁
度検出器の伝達特性が良いものであればVO＝1.5Vとな
り、悪いものであればVO＝0.5Vとなった場合を考えてみ
る。ただし濁度検出器の伝達特性はこの２つの場合だけ
でなく無数の組合せが存在することはいうまでもない。
次に、マイクロコンピュータ11は、この最初の出力電圧
VOの値に応じて、予めその内部ROMにメモリされた第６
図のVOとIFテーブルにもとずき、次に濁度検出器の発光
素子７に流す制御電流IFを決定するようにしている。す
なわち、VO＝0.5Vであれば、次に流すIFを30mAとし、VO
＝1.5Vであれば、IF＝10mAとするものである。そして、
この第６図にもとづくIFを流したときの受光素子の出力
電圧VOを再度入力し、このVOが所定値内かどうかを判断
し、所定値内であれば、濁度検出器の発光素子７の電流
設定を終了する。ここで、VOが所定値ではなく、所定値
以下であれば、発光素子の電流IFを増加し、濁度検出器
の受光素子の出力電圧VOを入力し、所定値に達したかど
うかを判断する。また、VOが所定値以上であれば、発光
素子の電流IFを減少し、再度、出力電圧VOを入力し、所
定値に達したかどうかを判断するものである。ただし、
このときのIFの増減中はマイクロコンピュータ11のPWM
出力端子の最小制御電流であり、先に述べたように0.4m
A程度の電流である。The microcomputer 11 first supplies a small current of 5 mA to the light emitting element 7 and outputs the output voltage V O of the light receiving element 8 at this time.
Input from A / D input. At this time, as shown in FIG. 4, consider the case where V O = 1.5 V if the transfer characteristic of the turbidity detector is good and V O = 0.5 V if the transfer characteristic is poor. However, it goes without saying that the transfer characteristics of the turbidity detector include not only these two cases but also countless combinations.
Next, the microcomputer 11 calculates the first output voltage
According to the value of V O , the sixth memory previously stored in its internal ROM
Motozuki the V O and I F table of FIG, then is adapted to determine the control current I F flowing through the light-emitting element 7 of turbidity detector. That is, if V O = 0.5V, then the flow I F and 30 mA, V O
= If 1.5V, it is an I F = 10 mA. And
The output voltage V O of the light receiving element when a current of I F based on the Figure 6 re-enter, the V O is determined whether a predetermined value, if it is within the predetermined value, the turbidity detector The current setting of the light emitting element 7 ends. Here, V O is not a predetermined value, equal to or less than a predetermined value, increasing the current I F of the light emitting element, and inputs the output voltage V O of the light receiving elements of the turbidity detectors, or reaches a predetermined value Judge whether or not. Also, if V O is greater than a predetermined value, it reduces the current I F of the light emitting element, in which again inputs the output voltage V O, to determine if it has reached a predetermined value. However,
PWM of I F during the increase or decrease the microcomputer 11 at this time
The minimum control current of the output terminal, which is 0.4 m
The current is about A.
このように、マイクロコンピュータ11の制御手段は、
濁度検出器の伝達特性の大きさを、発光素子へ最初に流
す電流による受光素子の出力電圧により判断するので、
濁度検出器の感度調整を短時間で行なえるものである。Thus, the control means of the microcomputer 11
Since the magnitude of the transfer characteristic of the turbidity detector is determined by the output voltage of the light receiving element due to the first current flowing to the light emitting element,
The sensitivity of the turbidity detector can be adjusted in a short time.
なお、上記実施例では濁度検出器の感度調整を洗濯開
始初期に行なったが、外槽１内に水の無い場合、すすぎ
前の給水中のように光の透過率が安定しているときに行
なってもよい。In the above embodiment, the sensitivity of the turbidity detector was adjusted at the beginning of washing. However, when there is no water in the outer tub 1, when the light transmittance is stable as in water supply before rinsing. May be performed.
発明の効果 以上のように本発明は、最初に微少電流を濁度検出器
の発光素子に流し、このときの受光素子の出力信号の値
に応じて、発光素子に流す電流の値を予測し、この予測
した電流を発光素子に流すことにより受光素子の出力が
所定の範囲内にはいるよう発光素子の電流値を増減させ
ることにより微調整をはかる。これにより、濁度検出器
の伝達特性のバラツキ、経年変化による受発光素子の汚
れの度合いによる伝達特性のバラツキなどに関係なく濁
度検出器の感度調整を短時間で行うことができるもので
ある。Effect of the Invention As described above, according to the present invention, a small current is first applied to the light emitting element of the turbidity detector, and the value of the current applied to the light emitting element is predicted according to the value of the output signal of the light receiving element at this time. Fine adjustment is performed by increasing or decreasing the current value of the light emitting element so that the output of the light receiving element falls within a predetermined range by flowing the predicted current through the light emitting element. Accordingly, the sensitivity of the turbidity detector can be adjusted in a short time regardless of the variation in the transmission characteristics of the turbidity detector, the variation in the transmission characteristics due to the degree of contamination of the light receiving / emitting element due to aging, and the like. .
第１図は本発明の一実施例を示す洗濯機の制御装置を示
すブロック図、第２図は同パルス出力信号を示す図、第
３図は同パルス出力信号のハイレベル幅tHと発光素子の
電流特性を示す図、第４図は濁度検出器の伝達特性を示
す図、第５図は同濁度検出器の感度調整方法を示すフロ
ーチャート、第６図は同マイクロコンピュータに予めメ
モリされたROMの内容を示す図である。 １……外槽、２……洗濯液、３……内槽、７……発光素
子、８……受光素子、11……制御手段（マイクロコンピ
ュータ）、12……D/A回路、13……定電流回路、14……
電圧変換回路。FIG. 1 is a block diagram showing a control device of a washing machine according to an embodiment of the present invention, FIG. 2 is a diagram showing the pulse output signal, and FIG. 3 is a diagram showing a high level width t H and light emission of the pulse output signal. FIG. 4 is a diagram showing a current characteristic of the element, FIG. 4 is a diagram showing a transfer characteristic of the turbidity detector, FIG. 5 is a flowchart showing a sensitivity adjusting method of the turbidity detector, and FIG. FIG. 6 is a diagram showing the contents of a ROM that has been selected. DESCRIPTION OF SYMBOLS 1 ... Outer tub, 2 ... Washing liquid, 3 ... Inner tub, 7 ... Light emitting element, 8 ... Light receiving element, 11 ... Control means (microcomputer), 12 ... D / A circuit, 13 ... … Constant current circuit, 14 ……
Voltage conversion circuit.
Claims (1)
度変化を検出する濁度検出器と、前記発光素子への制御
電流を変化させる電流制御回路と、前記受光素子の出力
信号が所定範囲内になるよう前記電流制御回路により電
流を可変する制御手段とを有し、前記制御手段は、微少
電流を前記発光素子に流し、このときの受光素子の出力
信号に基づいて、発光素子への電流の値を予測し、予測
した値の電流を増減させて、受光素子の出力信号が、所
定の範囲にはいるようにした洗濯機の制御装置。1. A turbidity detector for detecting a change in turbidity of a liquid in a tank by a light emitting element and a light receiving element, a current control circuit for changing a control current to the light emitting element, and an output signal of the light receiving element. And control means for varying the current by the current control circuit so that the current falls within a predetermined range. The control means supplies a small current to the light emitting element and emits light based on an output signal of the light receiving element at this time. A control device for a washing machine which predicts a value of a current to an element and increases or decreases the current of the predicted value so that an output signal of the light receiving element falls within a predetermined range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1102653A JP2722654B2 (en) | 1989-04-21 | 1989-04-21 | Washing machine control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1102653A JP2722654B2 (en) | 1989-04-21 | 1989-04-21 | Washing machine control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02280793A JPH02280793A (en) | 1990-11-16 |
| JP2722654B2 true JP2722654B2 (en) | 1998-03-04 |
Family
ID=14333202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1102653A Expired - Fee Related JP2722654B2 (en) | 1989-04-21 | 1989-04-21 | Washing machine control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2722654B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0793918B2 (en) * | 1992-02-04 | 1995-10-11 | 三洋電機株式会社 | Dishwasher controller |
| DE10061237A1 (en) * | 2000-12-08 | 2002-06-27 | Bsh Bosch Siemens Hausgeraete | Washing machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59197290A (en) * | 1983-04-25 | 1984-11-08 | 松下電器産業株式会社 | Washer |
-
1989
- 1989-04-21 JP JP1102653A patent/JP2722654B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02280793A (en) | 1990-11-16 |
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