The standard washing program of Samsung automatic drum washing machine has unique sensing function. Before entering the water, the machine will slowly rotate in one direction for a few seconds, then stop, then slowly rotate in the opposite direction for a few seconds, and then stop. Repeat several times before entering the water, and automatically sense the weight of clothes through idling, so as to select the appropriate water level, which is more environmentally friendly and energy-saving.
The automatic washing machine can also automatically judge the water temperature, water level, clothes quality and clothes dirt, and determine the appropriate detergent dosage and the best washing procedure. When the quantity and texture of clothes in the washing bucket are different, the total weight will be different if water is injected to make them reach the same water level. Taking advantage of this, the quality and quantity of clothes can be judged by measuring the inertia of the washing motor after low-speed rotation. The method is as follows: after a certain amount of water is injected into the washing tub, the motor runs at a low speed, and after it stabilizes, the power is cut off quickly, and the washing tub drives the motor to continue to rotate under the inertia. At this time, the motor winding generates back electromotive force, rectifies its half wave, amplifies and shapes it, and obtains a rectangular pulse sequence. By analyzing the pulse number and pulse width. You can get the quality and quantity of clothes. Piezoelectric sensors are used for dehydration. When the dehydration barrel is highly rotated, the water sprayed from the dehydration barrel acts on the piezoelectric sensor, and the dehydration operation automatically stops according to this pressure change.