Output signal detection circuit and detection method of dish-washing machine flowmeter

A technology for detecting circuits and outputting signals, applied in the field of water inflow accuracy detection in dishwashers, can solve the problems of inaccurate water inflow metering, high hardware costs, and unsatisfactory effects, and achieves a wide selection range, simple hardware, and ease of use. maintenance effect

Active Publication Date: 2012-02-15
WUHU MIDEA SMART KITCHEN APPLIANCE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of detection circuit and processing method has high hardware cost, and at the same time, it needs to be connected to a single-chip microcomputer resource with an external interrupt port. The effect of hardware filtering is not very ideal, and there is still the problem of inaccurate measurement of water inflow.

Method used

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  • Output signal detection circuit and detection method of dish-washing machine flowmeter
  • Output signal detection circuit and detection method of dish-washing machine flowmeter
  • Output signal detection circuit and detection method of dish-washing machine flowmeter

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with drawings and embodiments.

[0020] Such as figure 1 As shown, the output signal detection circuit of the dishwasher flowmeter of the present invention includes a single-chip microcomputer 1, a detection circuit 2 and a flowmeter 3, wherein the flowmeter 3 outputs a signal to the detection circuit 2, and the signal is filtered by the detection circuit 2 after hardware filtering. The signal is transmitted to the single-chip microcomputer 1, and the single-chip microcomputer 1 confirms the input signal through a detection method.

[0021] Such as figure 2 As shown, the model of the single-chip microcomputer 1 is UPD78F8513A or UPD78F0524A or UPD78F0511 of NEC.

[0022] The detection circuit 2 includes a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2 and a connector CN, wherein: one end of the first resistor R1 is connected to the 10th pin of the microcontrolle...

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Abstract

The invention relates to an output signal detection circuit and a detection method of a dish-washing machine flowmeter, wherein the detection circuit comprises a singlechip, a detection circuit and a flowmeter, the detection circuit receives the output signal of the flowmeter, the signal is processed by the detection circuit and is then transferred to the singlechip, and the singlechip validates the input signal through the detection method. The detection method comprises a low level validation phase, a high level validation phase and a pulse validation phase. The invention has the beneficial effects that: the universal singlechip resources can be utilized, the pulse is identified and processed through the logical judge of the software algorithm, so the purposes of reducing the development cost and improving the water inflow accuracy of the dish-washing machine flowmeter are realized, the hardware is simpler and is easy to maintain, and the software design algorithm is easy to transplant.

Description

technical field [0001] The invention belongs to the field of dishwasher water inlet precision detection, in particular to a detection circuit and a detection method for output signals of a dishwasher flowmeter, and belongs to an improvement technology for the output signal detection circuit and detection method of a dishwasher flowmeter. Background technique [0002] Dishwashers have different washing stages in the process of washing tableware. Each washing stage requires a certain amount of water, and water consumption is an important parameter of dishwasher products. The accuracy and reliability of each water intake directly affects to the performance and energy consumption of dishwasher products. [0003] At present, the dishwasher in the prior art usually uses a flowmeter to measure the water intake. During the water intake process, this water intake device can convert the water volume into a certain number of on-off interval cycles. After processing by the conversion ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/56
Inventor 黄华明程刚钟启旺管庆军刘增日
Owner WUHU MIDEA SMART KITCHEN APPLIANCE MFG CO LTD
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