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With the development of technology and society, more and more families start to use sweeping robots for cleaning. In the sweeping robot, the sewage tank is a very critical part, because it is used to store the sewage and rainwater generated during the cleaning process. Therefore, it is very important to monitor and control the liquid level of the sewage tank, so that the working efficiency of the sweeping robot can be maintained through timely cleaning.
In liquid level detection scheme, the choice of sensor is very important. Due to the particularity of liquid level sensors, many standard sensors are often not sufficient. Therefore, a special sensor is required to detect the liquid level. In this process, the most commonly used sensor is the non-contact liquid level sensor. The non-contact liquid level sensor effectively solves the problems of low precision and stuck failure of the traditional mechanical type.
