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Control circuit and working method thereof

A technology of control circuit and working method, applied in the direction of control/adjustment system, adjustment of electrical variables, instruments, etc., can solve the problems of increasing the difficulty of production control, inability to apply potentiometers, and the knob control method is easily affected by the environment, etc.

Inactive Publication Date: 2018-03-13
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the knob control method for grading by presetting can only use a knob potentiometer with a fixed resistance value, so it cannot be applied to other types of potentiometers, and the error range of this knob control method has a high requirement, thereby increasing production. It is difficult to control, which increases the production cost; and the knob control method is easily affected by the environment, which leads to inaccurate gear control and affects the performance of the product

Method used

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  • Control circuit and working method thereof
  • Control circuit and working method thereof
  • Control circuit and working method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0056] See figure 1 , Which shows a control circuit 10 provided by an embodiment of the present invention, such as figure 1 As shown, the control circuit 10 may include: a potentiometer 101, a control unit 102, a pull-up resistor 103, and a pull-down resistor 104; it is understandable that the complete control circuit also needs to include a voltage for the normal operation of the control circuit The power supply VCC and the ground GND are not repeated in this embodiment.

[0057] in figure 1 In the control circuit shown, the first fixed terminal 1 of the potentiometer 101 is connected to the pull-up resistor 103; the second fixed terminal 2 of the potentiometer 101 is connected to the pull-down resistor 104; the potentiometer The sliding end 3 of 101 is connected to the control unit 102;

[0058] The control unit 102 is configured to obtain the voltage value range of the potentiometer 101 in a working state;

[0059] And, the voltage step value corresponding to each gear is determi...

Embodiment 2

[0087] Based on the same technical idea as the foregoing embodiment, see image 3 , Which shows a working method of a control circuit provided by an embodiment of the present invention. The method can be applied to the control circuit described in the above embodiment. The control circuit may include: a potentiometer, a control unit, a pull-up resistor, and A pull-down resistor; wherein the first fixed end of the potentiometer is connected to the pull-up resistor; the second fixed end of the potentiometer is connected to the pull-down resistor; the sliding end of the potentiometer is connected to the control unit Connection; the working method of the control circuit can include:

[0088] S301: The control unit obtains the voltage value range in the working state of the potentiometer;

[0089] S302: The control unit determines the voltage step value corresponding to each gear within the voltage value range according to the preset number of gears; wherein the voltage step value corre...

Embodiment 3

[0105] For example two, image 3 The specific control circuit shown is an example, see Image 6 The detailed process of the working method of the control circuit may include:

[0106] S601: After power-on, the control unit detects the port voltage of the potentiometer;

[0107] Understandably, such as image 3 As shown, the control unit can detect the port voltage of the potentiometer sliding end;

[0108] S602: The control unit detects whether the switch is closed; if so, go to S603; otherwise, go to S601 to continue to detect the port voltage of the potentiometer;

[0109] S603: When the switch is closed, the control unit samples the voltage V1 at the sliding end of the potentiometer;

[0110] S604: The control unit obtains the wiper voltage V2 at the maximum stroke of the potentiometer according to the voltage V1 at the wiper end of the potentiometer when the switch is closed;

[0111] S605: The control unit determines the voltage value range in the working state of the potentiometer ...

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Abstract

Embodiments of the invention disclose a control circuit and a working method thereof. The control circuit comprises a potentiometer, a control unit, a pull-up resistor, and a pull-down resistor. A first fixing end of the potentiometer is connected with the pull-up resistor. A second fixing end of the potentiometer is connected with the pull-down resistor. A sliding end of the potentiometer is connected with the control unit. The control unit is used to obtain voltage value range of the potentiometer in an operating state, and according to preset gear shifts, determining a voltage stepping value corresponding to each gear in the voltage value range. The voltage stepping value corresponding to each gear is used for gear shifting control.

Description

Technical field [0001] The invention relates to the field of household appliances, in particular to a control circuit and a working method thereof. Background technique [0002] At present, the operation control methods for household appliances such as induction cookers, rice cookers, electric pressure cookers, and garment steamers mainly include three methods: touch, buttons and knobs; and knob control methods are widely used due to their easy operation. [0003] The current common knob control method mainly divides the number of segments according to the resistance value of the knob potentiometer, by sampling the voltage value corresponding to each segment number of the knob potentiometer connected to the circuit, and dividing the sampled voltage value according to the preset files. [0004] However, the knob control method that is divided by preset settings can only use fixed resistance knob potentiometers, so it cannot be applied to other types of potentiometers, and the error r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
Inventor 曾燕侠孟宪昕
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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