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Sensor control method and control device thereof

A control method and sensor technology, applied in the direction of instruments, signal transmission systems, electrical signal transmission systems, etc., can solve the problems of affecting the accuracy, the sensor is in the working state, and the working life is short, so as to achieve the effect of prolonging the service life

Active Publication Date: 2014-02-26
MIDEA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sensors installed on electrical appliances do not use special control. After the household appliances are powered on, the sensors are always in the power-on state. Although the household appliances are in the standby / off state, the sensors are in the working state.
Therefore, sensors with short working life like carbon dioxide cannot meet the life requirements of household appliances without special control.
Even if the temperature sensor and humidity sensor have a long working life, such a long time work will inevitably affect the accuracy, and cannot maintain high accuracy within 10 years

Method used

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  • Sensor control method and control device thereof
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  • Sensor control method and control device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Temperature sensor control circuit.

[0036] Figure 4 It is an ordinary temperature sampling circuit; Figure 5 To increase the temperature sampling circuit of the control component.

[0037] Figure 4 Among them, the main control MCU is the control core of household appliances. In this example, the NEC0511 single-chip microcontroller is used. The left side of NEC0511 is the reset circuit and the crystal oscillator circuit. The upper part is the temperature sampling circuit, and other peripheral circuits are omitted. The temperature sensor is a thermistor whose resistance changes with temperature. R18 is a voltage divider 8.1K resistor. When the temperature changes, the output resistance of the temperature sensor will change, and the voltage across the sensor will change, that is, the voltage at point A will change. After filtering by capacitors E6, R20, and C8, it is connected to the pin34 port of the master MCU. The control MCU performs AD conversion to collect...

Embodiment 2

[0044] Example 2 Carbon dioxide sensor control circuit.

[0045] Image 6 It is an ordinary carbon dioxide sampling circuit, Figure 7 Compared with the CO2 sampling circuit to increase the control components Image 6 .

[0046] Image 6 Among them, the main control MCU is the control core of household appliances. In this example, the NEC0511 single-chip microcontroller is used. The left side of NEC0511 is the reset circuit and the crystal oscillator circuit. The upper part is the carbon dioxide detection and sampling circuit, and other peripheral circuits are omitted. The carbon dioxide sensor is an electrochemical sensor, which outputs a voltage of 0-4.5V according to the change of carbon dioxide concentration. When the concentration of carbon dioxide changes, the output voltage of the sensor (Output port) changes accordingly. After being filtered by capacitors E19, R142, and C75, it is connected to the pin34 port of the master MCU. The master MCU performs AD conversion through p...

Embodiment 3

[0053] Example 3 Humidity sensor control circuit.

[0054] Figure 8 It is an ordinary humidity sampling circuit.

[0055] Figure 8 Among them, the main control MCU is the control core of household appliances. In this example, the NEC0511 single-chip microcontroller is used. The left side of NEC0511 is the reset circuit and the crystal oscillator circuit. The upper part is the humidity detection and sampling circuit, and other peripheral circuits are omitted. The humidity sensor is a polymer humidity sensitive resistor, which outputs a voltage of 1-3V according to changes in humidity. When the humidity changes, the output voltage of the sensor (Output port) changes accordingly. After being filtered by capacitors E3, R15, and C1, it is connected to the pin34 port of the main control MCU. The main control MCU performs AD conversion through pin34 to collect the voltage, and according to the collected The voltage information calculates the humidity.

[0056] in Figure 8 In the mid...

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Abstract

The present invention relates to a sensor control method and a control device thereof. The sensor control method comprises the following steps that: 1, a household appliance controller starts a sensor to carry out preheating, wherein the preheating time is T1; 2, the household appliance controller samples n times by the sensor, and acquires corresponding current state values, wherein the using time is T2; 3, the household appliance controller closes the sensor, wherein the closing time is T3. The sensor control device comprises the household appliance controller, the sensor and a sensor control part, wherein the sensor control part is connected between the household appliance controller and the sensor, and is provided for controlling the sensor closing. According to the present invention, the control part is adopted to control the sensor, the control part controls the sensor to always close when the household appliance is at the shutdown / standby state, and the control part controls the sensor to imtermittently work when the household appliance is at the turn-on state, such that the service life of the sensor on the household appliance can be prolonged under the condition of the fixed service life of the sensor so as to achieve the service life requirement of the whole household appliance.

Description

Technical field [0001] The invention relates to the technical field of electrical equipment, in particular to a sensor control method and control device. Background technique [0002] Commonly used thermal temperature sensors, electrochemical carbon dioxide sensors, resistive humidity sensors, etc. will experience a decrease in accuracy and zero drift after a certain period of power-on operation. If manual calibration is not carried out, it will affect the control accuracy of household appliances. A large amount of work wastes manpower and material resources. For example, electrochemical carbon dioxide only has a working life of 1-2 years, after which the accuracy will decrease and the zero point will drift. At present, the warranty of household appliances is generally 1-6 years, or even up to 10 years. At present, the sensors installed on electrical appliances do not use special control. The sensors are always in the energized state after the household appliances are powered on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08C19/00
Inventor 霍军亚李强罗宇华付新滕建文梁敏游
Owner MIDEA GRP CO LTD