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 working state, and the working life is short, and achieve the effect of prolonging the service life.

Active Publication Date: 2012-05-09
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] Embodiment 1 Temperature sensor control circuit.

[0036] Figure 4 For ordinary temperature sampling circuit; Figure 5 In order to increase the temperature sampling circuit of the control part.

[0037] Figure 4 Among them, the main control MCU is the control core of household appliances. In this example, NEC0511 single-chip microcontroller is used. The reset circuit and crystal oscillator circuit are on the left side of NEC0511, and the temperature sampling circuit is on the top, and other peripheral circuits are omitted. The temperature sensor is a thermistor, the resistance value changes with temperature, and R18 is a voltage divider 8.1K resistor. When the temperature changes, the output resistance of the temperature sensor will change, and the voltage at both ends of the sensor will change, that is, the voltage at point A will change. The control MCU performs AD conversion to collect voltage through pin34, and calculates the temperature according to the coll...

Embodiment 2

[0044] Embodiment 2 Carbon dioxide sensor control circuit.

[0045] Figure 6 For ordinary carbon dioxide sampling circuit, Figure 7 For adding control components to the carbon dioxide sampling circuit compared to Figure 6 .

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

Embodiment 3

[0053] Embodiment 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, NEC0511 single-chip microcontroller is used. The left side of NEC0511 is the reset circuit and crystal oscillator circuit. The upper part is the humidity detection sampling circuit, and other peripheral circuits are omitted. The humidity sensor is a polymer humidity sensitive resistor, which outputs 1-3V voltage according to the change of humidity. When the humidity changes, the sensor output voltage (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] exist Figure 8 Among them, a Q600...

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PUM

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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 a control device. Background technique [0002] Commonly used thermosensitive temperature sensors, electrochemical carbon dioxide sensors, resistive humidity sensors, etc. will have accuracy drop and zero drift after a certain period of time. If manual calibration is not performed, it will affect the control accuracy of household appliances. If manual calibration will occur A lot of work, a waste of manpower and material resources. For example, electrochemical carbon dioxide has a working life of only 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 as long as 10 years. At present, the sensors installed on the electrical appliances do not use special control. After the household appliances are powered on, the sensors are always...

Claims

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Application Information

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Patent Type & Authority Applications(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
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