JPH03158111A - Rice cooker - Google Patents
Rice cookerInfo
- Publication number
- JPH03158111A JPH03158111A JP1298230A JP29823089A JPH03158111A JP H03158111 A JPH03158111 A JP H03158111A JP 1298230 A JP1298230 A JP 1298230A JP 29823089 A JP29823089 A JP 29823089A JP H03158111 A JPH03158111 A JP H03158111A
- Authority
- JP
- Japan
- Prior art keywords
- fuzzy inference
- ratio
- electrification
- determined
- electrification ratio
- 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
Links
- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 19
- 235000009566 rice Nutrition 0.000 title claims abstract description 19
- 240000007594 Oryza sativa Species 0.000 title claims abstract 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 13
- 235000013305 food Nutrition 0.000 claims description 4
- 238000010411 cooking Methods 0.000 abstract description 15
- 230000005484 gravity Effects 0.000 abstract description 3
- 241000209094 Oryza Species 0.000 description 16
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Cookers (AREA)
- Feedback Control In General (AREA)
- Control Of Temperature (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は最適炊飯を可能とした炊飯器に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rice cooker that enables optimum rice cooking.
従来の技術
従来の炊飯器における加熱手段への通電比率決定方法の
一例を以下に述べる。炊き上げ行程に入ると通電比率を
100%として急激に加熱し、所定の温度に達した時の
温度勾配θよりその後の通電比率αを決定していた。こ
の時αの決定はα =a本θ + b ・・・(1
)という線形式に基づいて行われていた。BACKGROUND OF THE INVENTION An example of a method for determining the energization ratio to heating means in a conventional rice cooker will be described below. When the cooking process begins, the energization ratio is set to 100% to rapidly heat the rice, and the subsequent energization ratio α is determined from the temperature gradient θ when a predetermined temperature is reached. At this time, the determination of α is α = a book θ + b ... (1
) was based on the linear form.
発明が解決しようとする課題
しかし前記(1)式は理想的な場合のことで、現実には
温度検出素子の特性や、設置位置等により(1)式のよ
うにリニアな関係にはならない。即ち、(1)式に基づ
いて決定される通電比率は最適なものではないという課
題があった。Problems to be Solved by the Invention However, the equation (1) above is for an ideal case, and in reality, the relationship is not as linear as the equation (1) due to the characteristics of the temperature detection element, the installation position, etc. That is, there was a problem that the energization ratio determined based on equation (1) was not optimal.
そこで本発明は、このような従来の課題を解決しようと
するものであって、加熱手段の通電比率をファジィ推論
により決定し最適な炊飯をする炊飯器を提供することを
目的とするものである。Therefore, the present invention aims to solve such conventional problems, and aims to provide a rice cooker that determines the energization ratio of the heating means by fuzzy reasoning and cooks rice optimally. .
課題を解決するための手段
前記目的を達成するために本発明は、ヒータ等の加熱装
置と、この加熱装置の通電比率を制御するトライアック
等のスイッチング素子とを有する加熱手段と、被調理物
の温度を検出するサーミスタ等の温度検出素子と、この
温度検出素子の検出値より通電比率を決定するファジィ
推論器と、このファジィ推論器により決定された通電比
率に応じて前記スイッチング素子を駆動する駆動装置と
を備えた炊飯器とするものである。Means for Solving the Problems In order to achieve the above objects, the present invention provides a heating means having a heating device such as a heater, a switching element such as a triac for controlling the energization ratio of the heating device, and A temperature detection element such as a thermistor that detects temperature, a fuzzy inference device that determines the energization ratio from the detected value of the temperature detection element, and a drive that drives the switching element according to the energization ratio determined by the fuzzy inference device. This is a rice cooker equipped with a device.
作 用
前記手段による作用は以下の通りである。即ち、温度検
出素子による被調理物の温度から、加熱手段の適当な通
電比率をファジィ推論器が決定する。この決定された通
電比率に応じて駆動装置がスイッチング素子を駆動する
ことにより炊飯を行うものである。この時、人間が経験
的に知っている炊飯のノウ・ハウをファジィ推論器に持
たせることにより、前記炊飯を最適なものとすることが
できる。Effects The effects of the above means are as follows. That is, the fuzzy reasoner determines an appropriate energization ratio for the heating means based on the temperature of the food detected by the temperature detection element. The driving device drives the switching element according to the determined energization ratio to cook rice. At this time, by equipping the fuzzy reasoner with rice cooking know-how that humans know from experience, the rice cooking can be made optimal.
実施例
本発明の一実施例を第1図〜第6図を基に説明する。本
体1の底部に設けた加熱手段3により鍋2を介して被調
理物を加熱する。加熱手段3は、ヒータ等の加熱装置と
この加熱装置の通電比率を制御するトライアック等のス
イッチング素子とで構成されている。4はサーミスタ等
の温度検出素子で、鍋2を介して被調理物の温度を検出
する。Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 6. The food to be cooked is heated through the pot 2 by the heating means 3 provided at the bottom of the main body 1. The heating means 3 is composed of a heating device such as a heater and a switching element such as a triac that controls the energization ratio of the heating device. Reference numeral 4 denotes a temperature detection element such as a thermistor, which detects the temperature of the food to be cooked via the pot 2.
5は放熱を防ぐ蓋である。5 is a lid that prevents heat radiation.
次に、通電比率の決定について第1図を基に説明する。Next, the determination of the energization ratio will be explained based on FIG. 1.
通電比率の決定は温度検出素子4の検出値を入力として
、ファジィ推論器6で推論決定することにより行われる
。この決定された通電比率に応じて駆動装置7が加熱手
段3を構成するスイッチング素子を駆動する。この時、
ファジィ推論器6および駆動装置7はマイクロコンピュ
ータで容易に実現できる。The energization ratio is determined by using the detected value of the temperature detecting element 4 as input and making an inference decision using the fuzzy inference device 6. The drive device 7 drives the switching elements constituting the heating means 3 according to the determined energization ratio. At this time,
The fuzzy inference device 6 and the driving device 7 can be easily realized with a microcomputer.
ファジィ推論の一実施例を第3図〜第6図を基に説明す
る。第3図は、炊飯実施時の温度検出素子4で検出した
温度変化を示している。炊き上げ行程では、通電比率を
100%とし、所定の温度T1に達した時の温度勾配θ
を検出する。これは温度検出素子4の検出値を微分する
ことで容易に得られる。この温度勾配θより、その後の
通電比率をファジィ推論で決定する。推論ルールは例え
ば「温度勾配θが大きければ、通電比率を小さくする。An example of fuzzy inference will be explained based on FIGS. 3 to 6. FIG. 3 shows temperature changes detected by the temperature detection element 4 during rice cooking. In the cooking process, the energization ratio is set to 100%, and the temperature gradient θ when the predetermined temperature T1 is reached.
Detect. This can be easily obtained by differentiating the detected value of the temperature detection element 4. From this temperature gradient θ, the subsequent energization ratio is determined by fuzzy reasoning. For example, the inference rule is ``If the temperature gradient θ is large, reduce the energization ratio.
」といったもので第4図に示す3個のルールからなる。”, which consists of three rules shown in Figure 4.
温度勾配θが「大きい」とか、通電比率を「小さく」と
いった定性的な概念は第5図(a)、(b)に示すメン
バーシップ関数により定量的に表現される。この時、推
論ルールおよびメンバーシップ関数は経験的に、もしく
は実験的に設計することができる。Qualitative concepts such as the temperature gradient θ being "large" or the energization ratio being "small" are expressed quantitatively by the membership functions shown in FIGS. 5(a) and 5(b). At this time, the inference rules and membership functions can be designed empirically or experimentally.
次に、推論演算の方法について述べる。第6図にファジ
ィ推論器8の具体的な構成について示す。以下同図を用
いて説明する。まず、通電比率推論ルール記憶手段12
に記憶されているルールに従って温度勾配適合度算出手
段9では、入力すなわち温度検出素子4の検出値の変化
分に対して温度勾配メンバーシップ関数記憶手段10に
記憶されているメンバーシップ関数とMAXをとること
により前件部の適合度を求める。次に後件部ミニマム演
算手段13では、通電比率メンバーシップ関数記憶手段
14に記憶されているメンバーシップ関数と前件部適合
度のMINをとってそのルールの結論とする。さらに、
通電比率推論ルール記憶手段12に記憶されている全て
のルールについてそれぞれの結論を求めた後、重心演算
手段11では全結論のMAXをとり、その重心を求める
ことにより、最終的な結論として加熱手段・\の通電比
率が得られる。Next, a method of inference calculation will be described. FIG. 6 shows the specific configuration of the fuzzy inference unit 8. This will be explained below using the same figure. First, the energization ratio inference rule storage means 12
According to the rules stored in the temperature gradient membership function storage means 10, the temperature gradient compatibility calculation means 9 calculates the membership function stored in the temperature gradient membership function storage means 10 and MAX for the input, that is, the change in the detected value of the temperature detection element 4. The goodness of fit of the antecedent part is determined by Next, the consequent part minimum calculation means 13 takes the MIN of the membership function stored in the energization ratio membership function storage means 14 and the antecedent part fitness, and determines the conclusion of the rule. moreover,
After determining the respective conclusions for all the rules stored in the energization ratio inference rule storage means 12, the center of gravity calculating means 11 takes the MAX of all the conclusions, and by determining the center of gravity, the heating means is determined as the final conclusion.・A current conduction ratio of \ can be obtained.
このようなファジィ推論によると負荷に応じたきめ細か
い通電比率の決定を行うことができ、最適な炊き上げを
行う事ができる。According to such fuzzy reasoning, it is possible to determine the energization ratio in detail according to the load, and it is possible to perform optimal cooking.
以上炊飯器の炊き上げ行程の通電比率決定について説明
したが、前炊きゃ追い炊きの行程についても同様に、温
度検出素子4の検出値を入力としてファジィ推論するこ
とにより最適に各行程の通電比率を決定できることは言
うまでもない。なお本実施例ではファジィ推論の後件部
変数を一般的な三角型としたが、実数値や関数で実現す
る方法も考えられる。The above has explained how to determine the energization ratio for the rice cooking process of the rice cooker, but similarly for the pre-cooking and additional cooking processes, the energization ratio for each process can be optimally determined by fuzzy reasoning using the detected value of the temperature detection element 4 as input. Needless to say, it is possible to determine In this embodiment, the consequent variable of the fuzzy inference is a general triangular type, but it is also possible to implement it using real values or functions.
発明の詳細
な説明したように本発明によると、被加熱物の温度状態
からファジィ推論により加熱手段の通電比率を決定する
ので、きめの細かい最適な炊飯を行うことができる。な
ぜならば1人間が経験的に知っている炊飯のノウ・ハウ
をファジィ推論器に容易に持たせることができるからで
ある。As described in detail, according to the present invention, the energization ratio of the heating means is determined by fuzzy reasoning from the temperature state of the object to be heated, so that detailed and optimal rice cooking can be performed. This is because the know-how of rice cooking that one person knows from experience can be easily provided to the fuzzy reasoner.
第1図は本発明の一実施例を示すブロック図、第2図は
同実施例の構成図、第3図は同炊飯過程における温度変
化を示す図、第4図はファジィ推論のルールを示す図、
第5図はファジィ推論のメンバーシップ関数を示す図、
第6図はファジィ推論器の構成を示す図である。
1・・・本体、2・・・鍋、3・・・加熱手段、4・・
・温度検出素子、6・・・ファジィ推論器、7・・・駆
動装置、8・・・マイクロコンピュータ。Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a block diagram of the embodiment, Fig. 3 is a diagram showing temperature changes during the rice cooking process, and Fig. 4 shows the rules of fuzzy inference. figure,
Figure 5 is a diagram showing the membership function of fuzzy inference,
FIG. 6 is a diagram showing the configuration of the fuzzy inference device. 1... Main body, 2... Pot, 3... Heating means, 4...
- Temperature detection element, 6... Fuzzy inference device, 7... Drive device, 8... Microcomputer.
Claims (1)
御するトライアック等のスイッチング素子とを有する加
熱手段と、被調理物の温度を検出するサーミスタ等の温
度検出素子と、この温度検出素子の検出値より通電比率
を決定するファジィ推論器と、このファジィ推論器によ
り決定された通電比率に応じて前記スイッチング素子を
駆動する駆動装置とを備えた炊飯器。A heating means having a heating device such as a heater, a switching element such as a triac that controls the energization ratio of this heating device, a temperature detection element such as a thermistor that detects the temperature of the food to be cooked, and detection of this temperature detection element. A rice cooker comprising: a fuzzy inference device that determines an energization ratio from a value; and a drive device that drives the switching element according to the energization ratio determined by the fuzzy inference device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1298230A JPH03158111A (en) | 1989-11-16 | 1989-11-16 | Rice cooker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1298230A JPH03158111A (en) | 1989-11-16 | 1989-11-16 | Rice cooker |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03158111A true JPH03158111A (en) | 1991-07-08 |
Family
ID=17856918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1298230A Pending JPH03158111A (en) | 1989-11-16 | 1989-11-16 | Rice cooker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03158111A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05219873A (en) * | 1992-02-14 | 1993-08-31 | Toshiba Corp | Oven controller |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60204002A (en) * | 1984-03-28 | 1985-10-15 | Fuji Electric Co Ltd | Mimic fuzzy estimating operating system of fuzzy control device |
JPS6198223A (en) * | 1984-10-19 | 1986-05-16 | シャープ株式会社 | Cooker |
JPS63131942A (en) * | 1986-11-21 | 1988-06-03 | Sharp Corp | Control system of air-conditioning machine |
-
1989
- 1989-11-16 JP JP1298230A patent/JPH03158111A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60204002A (en) * | 1984-03-28 | 1985-10-15 | Fuji Electric Co Ltd | Mimic fuzzy estimating operating system of fuzzy control device |
JPS6198223A (en) * | 1984-10-19 | 1986-05-16 | シャープ株式会社 | Cooker |
JPS63131942A (en) * | 1986-11-21 | 1988-06-03 | Sharp Corp | Control system of air-conditioning machine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05219873A (en) * | 1992-02-14 | 1993-08-31 | Toshiba Corp | Oven controller |
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