Calibration module of turbidity sensor and scouring water turbidity detection system and method

Abstract

The invention is applied to the field of household appliances and provides a calibration module of a turbidity sensor of a dish-washing machine. The calibration module comprises a control unit and a pulse width modulation (PWM) calibration unit which are connected with each other, wherein the control unit is used for presetting a turbidity standard value range, outputting a PWM control signal of the turbidity sensor with a preset duty ratio to the turbidity sensor, receiving a detection signal of turbidity of clear water entering the dish-washing machine transmitted by the turbidity sensor and judging whether the detection signal is in a standard value range; if the detection signal is not in the standard value range, the preset duty ratio is regulated, so that the detection signal is in the preset turbidity standard value range. The turbidity sensor is driven by the PWM control signal with the preset duty ratio for detection, and the detection signal is fed back to the control unit, so that the detection signal is compared with the turbidity standard value range by a control unit, the duty ratio of the PWM control signal is regulated so as to calibrate the turbidity sensor, and the turbidity sensor is not needed to be manually adjusted.

Description

technical field [0001] The invention belongs to the field of home appliances, and in particular relates to a calibration module of a dishwasher turbidity sensor, a washing water turbidity detection system and a detection method. Background technique [0002] The automatic washing function of the dishwasher is an intelligent washing method. According to the difference in the pollution degree of the tableware, the agreed washing process is carried out by adjusting the water intake, washing time, washing temperature and other conditions, so as to ensure the washing rate. Under the premise, the effect of water saving and energy saving can be achieved to the greatest extent. The effect of intelligent washing is based on the turbidity sensor detecting the turbidity of the water in the dishwasher liner to distinguish and judge, so the washing effect directly depends on whether the detection value of the turbidity sensor is accurate or not. [0003] Due to the characteristics of th...

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Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a calibration module for the turbidity sensor of the dishwasher, which aims to solve the need to manually adjust the turbidity sensor during the production of the dishwasher, resulting in low generation efficiency and drifting of the turbidity sensor after a period of use , the problem of poor washing effect

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