Detection circuit and detection method for output signal of pressure sensor

Abstract

The invention relates to a detection circuit and a detection method for an output signal of a pressure sensor. The detection circuit is characterized by comprising a singlechip, a detection circuit and a pressure sensor circuit, wherein the detection circuit receives the output signal of the pressure sensor, the signal is transferred to the singlechip after being processed by the detection circuit, and the singlechip confirms the input signal by a detection method. The detection method comprises a filter conversion period and a singlechip detection confirming processing period; and the singlechip detection confirming processing period includes five mutually correlative sub-periods consisting of a washing water level detection period, a washing pump fault detection period, a filter screen blocking detection period, a static water pressure reading period and a filter screen blocking processing period. The detection circuit and detection method for output signal of pressure sensor has the advantages of being capable of preventing a heating tube being burned without water caused by the fault of the washing pump, so that safety of a dish-washing machine is enhanced, and the fault of the dish-washing machine is prompted so as to be convenient to maintain; therefore, the dish-washing machine can operate more humanly and intelligently, the wash rate of the dish-washing machine is enhanced, the heating tube can be prevented being burned without water caused by the complete blocking of the filter screen, and the safety of the dish-washing machine is improved.

Description

technical field [0001] The invention belongs to the field of dishwasher washing pump fault detection and filter clogging detection and processing, and specifically relates to: a detection circuit of an output signal of a pressure sensor and a method for signal detection and processing, and belongs to a new detection circuit of a dishwasher pressure sensor and New technologies for fault detection and filter blockage detection and treatment. Background technique [0002] At present, dishwashers are gradually developing in the direction of intelligence, and the application of various sensors has become a new main development highlight of dishwashers. However, most dishwashers on the market still detect the water level through the pressure switch device. Since the pressure switch can only detect the water level at a certain point, it has the defect of not being able to detect the water level linearly, so the washing pump and filter cannot be monitored through the change of the w...

AI Technical Summary

Problems solved by technology

However, most dishwashers on the market still detect the water level through the pressure switch device. Since the pressure switch can only detect the water level at a certain point, it has the defect of not being able to detect the water level linearly, so the washing pump and filter cannot be monitored through the change of the water level. During the operation of the dishwasher, if the washing pump fails at this time, the water in the inner tank of the dishwasher cannot circulate into the heating pipe, which will cause the heating pipe to dry and cause a safety accident; Blockage will not only affect the washing effect of the dishwasher, but in severe cases, the water in the inner tank will not be able to circulate into the heating tube, resulting in dry heating of the heating tube, causing safety accidents

Even though there are very few pressure sensor models on the market, they are still not highly intelligent, and none of them have passed the pressure sensor to detect and deal with the failure detection of the washing pump and the clogging of the filter.

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