Method and device for measuring turbidity, dishwasher, storage medium

Abstract

An embodiment of the invention provides a method and a device for measuring turbidity, a dish-washing machine and a storage medium, and belongs to the field of kitchen appliances. The method for measuring turbidity includes the steps: acquiring measured values of a plurality of turbidity sensors; fusing and calculating the measured values of the turbidity sensors by a Kalman filter fusion algorithm to acquire turbidity estimation values, and taking the turbidity estimation values as measured turbidity values. By the method and the device for measuring turbidity, the accurate turbidity values can be acquired to control the dish-washing machine, so that washing effects are ensured.

Description

technical field [0001] The invention relates to the field of kitchen appliances, in particular to a method and device for measuring turbidity, a dishwasher and a storage medium. Background technique [0002] Dishwasher is a device for automatically cleaning bowls, chopsticks, plates, plates, knives, forks and other tableware, which can save a lot of labor. It is not only used in family life, but also widely used in restaurants, restaurants and other commercial fields. [0003] Dishwashers generally determine the degree of dirtiness of the items to be cleaned based on the turbidity sensor of the water after the initial cleaning, and select an automatic cleaning mode according to the turbidity information of the water in the tank after the initial cleaning sensed by the turbidity sensor. [0004] The principle of the turbidity sensor is: when light passes through a certain amount of water, the amount of light transmitted depends on the degree of turbidity of the water. The mor...

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Problems solved by technology

This makes a single turbidity sensor only able to detect the turbidity of the water near the sensor. If the water is uneven, it cannot represent the overall turbidity information well, and also makes the detected degree of dirt different from the actual dirt of the items to be cleaned. degree of error

[0005] Similarly, the turbidity sensor itself also has unstable factors, which cannot feedback turbidity information well, the information is easy to fluctuate, and the anti-interference ability is poor, so that the parameters set by the dishwasher according to the turbidity information often cannot be cleaned well. Tableware and chopsticks have caused the family's distrust of the dishwasher, making the dishwasher unable to adapt to different dishwashing tasks.

Due to the large noise of the turbidity sensor and the influence of the location and the environment, it cannot fully and accurately return stable water turbidity information, so that the automatic cleaning often cannot achieve the desired effect

[0006] The reasons for the current inaccurate sensor data of automatic dishwashers: on the one hand, the sensor principle and cost constraints make it difficult for the sensor to accurately feed back turbidity information; on the other hand, the sensor itself is only an observation of the actual situation, and it is subject to its own error , environmental noise, etc.

[0007] In the prior art, there is a method of using hardware circuit to filter the turbidity sensor, but hardware filtering not only increases the hardware cost, but also has systematic errors in the filtering circuit itself, which still cannot guarantee the accuracy of turbidity measurement, and this hardware filtering The solution can not effectively eliminate the error between different turbidity sensors, resulting in poor adaptability of the dishwasher, especially when the turbidity sensor is replaced, the measured value will still be inaccurate

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