Intelligent washing machines utilize fuzzy control technology. In recent years, intelligent washing machines have increasingly appeared on the market. Their so-called "intelligence" mainly manifests in their ability to replace human judgment of the dirtiness and cleanliness of clothes, and to decide how to wash and whether to continue washing. How is this achieved?
When humans perceive the dirtiness of clothes, they rely on vision and touch; when judging the dirtiness of clothes, they also rely on experience. Similarly, intelligent washing machines also need to first perceive the dirtiness of clothes, and then make decisions on whether to wash and how to wash based on the experience "taught" to them by humans. However, the "dirtiness" or "cleanliness" of clothes is a complex and fuzzy nature, and it is difficult to have an exact and universally applicable criterion for judgment. Therefore, people let the washing machine "try washing" first to perceive the dirtiness or cleanliness of clothes. Although this perception method is not completely applicable to all fabrics and all types of dirtiness, it is relatively the most feasible to implement.
After determining the degree of dirtiness, the washing machine enters the stage of processing the perceived information to make decisions. The information obtained by the sensors can be relatively accurate, but such accuracy, as in the question of "how many hairs on the head constitute baldness", is difficult to determine an exact number, and there is no need for such accuracy, because people's judgment of "whether clothes are washed clean" is actually fuzzy. Therefore, when the washing machine judges whether to continue washing clothes, the information obtained or sent out can only be inaccurate. Fuzzy control is a relatively mature theory, method and technology for processing and making decisions on inaccurate information. Many intelligent washing machines now also adopt this technology. Fuzzy control experts imitate human judgment and decision-making methods to formulate inference rules in fuzzy washing machine control: If the water turbidity is high, add more detergent; If the water turbidity is relatively high, add more detergent; If the water turbidity is low, add less detergent; If the amount of clothes is small, there are more synthetic fibers and the water temperature is high, use a very weak water flow and a very short washing time; If the amount of clothes is large, there are more cotton fabrics and the water temperature is low, use a very strong water flow and a very long washing time; If there are many clothes, half of which are cotton fabrics and half are synthetic fibers, and the water temperature is high, use a strong water flow and a long washing time; ...
Of course, with just such rules, the washing machine still cannot execute them; therefore, on this basis, a series of fuzzy control mathematical processing is carried out according to various methods already studied by many fuzzy control experts, so that the washing machine can issue instructions to execute corresponding actions.