KR20070016846A - Method for testing operation of gas sensor - Google Patents

Method for testing operation of gas sensor Download PDF

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KR20070016846A
KR20070016846A KR1020050071877A KR20050071877A KR20070016846A KR 20070016846 A KR20070016846 A KR 20070016846A KR 1020050071877 A KR1020050071877 A KR 1020050071877A KR 20050071877 A KR20050071877 A KR 20050071877A KR 20070016846 A KR20070016846 A KR 20070016846A
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gas sensor
sensor
output value
gas
change amount
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KR1020050071877A
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이갑열
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삼성전자주식회사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
    • G01D1/10—Measuring arrangements giving results other than momentary value of variable, of general application giving differentiated values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/129—Diode type sensors, e.g. gas sensitive Schottky diodes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N2021/0162—Arrangements or apparatus for facilitating the optical investigation using microprocessors for control of a sequence of operations, e.g. test, powering, switching, processing

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

본 발명은 가스센서의 동작검사방법에 관한 것으로, 휘발성물질로 센서의 출력특성을 변화시켜 작업자가 센서의 동작이상을 체크하는 공정을 삭제하고, 센서의 특성변화를 체크하여 자체적으로 동작이상 유무를 판단할 수 있도록 하는데 그 목적이 있다.The present invention relates to an operation inspection method of a gas sensor, by changing the output characteristics of the sensor to a volatile material, the operator deletes the process of checking the abnormal operation of the sensor, and by checking the characteristic change of the sensor to determine whether there is an operation abnormality itself The purpose is to be able to judge.

이를 위해 본 발명은 가스센서의 동작검사를 위한 공정모드인가 판단하는 단계; 공정모드이면 상기 가스센서의 출력값을 감지하여 센서출력값의 변화량을 산출하는 단계; 및 산출된 센서출력값의 변화량을 미리 정해진 기준값과 비교하여 가스센서의 동작이상 유무를 판단하는 단계를 포함하는 것이다.To this end, the present invention comprises the steps of determining whether the process mode for the operation of the gas sensor; Calculating a change amount of a sensor output value by detecting an output value of the gas sensor in a process mode; And determining whether there is an operation abnormality of the gas sensor by comparing the calculated change amount of the sensor output value with a predetermined reference value.

Description

가스센서의 동작검사방법{Method for testing operation of gas sensor}Method for testing operation of gas sensor

도 1은 본 발명에 의한 가스센서의 동작검사를 위한 제어 블록도,1 is a control block diagram for an operation test of a gas sensor according to the present invention;

도 2는 본 발명에 의한 가스센서의 동작 특성도,2 is an operation characteristic diagram of a gas sensor according to the present invention;

도 3은 본 발명에 의한 가스센서의 동작검사방법의 동작 흐름도.Figure 3 is a flow chart of the operation test method of the gas sensor according to the present invention.

*도면의 주요부분에 대한 부호 설명** Description of symbols on the main parts of the drawings *

10 : 가스센서 20 : 전원부10: gas sensor 20: power supply

30 : 입력부 40 : 제어부30 input unit 40 control unit

50 : 표시부 60 : 음량출력부50: display unit 60: volume output unit

본 발명은 가스센서의 동작검사방법에 관한 것으로, 특히 가스센서의 특성상 초기화시간동안 나타나는 출력전압의 변화량을 체크하여 가스센서의 동작이상 유무를 판단하는 가스센서의 동작검사방법에 관한 것이다.The present invention relates to an operation inspection method of a gas sensor, and more particularly, to an operation inspection method of a gas sensor that determines whether an operation abnormality of a gas sensor is checked by checking an amount of change of an output voltage occurring during an initialization time due to the characteristics of the gas sensor.

일반적으로, 가스센서를 사용하는 전기제품에는 공기조화장치, 조리장치 등이 있다. 이 중에서 공기조화장치는 실내의 오염정도를 가스센서를 통해 감지하여 오염된 실내공기를 정화시키며, 조리장치는 조리 중에 발생하는 가스량을 가스센서 를 통해 감지하여 조리실 내부의 연기나 가스를 외부로 배출함으로서 조리물에 나쁜 냄새가 배지 않도록 하고 있다.In general, electrical appliances using gas sensors include air conditioners, cooking devices, and the like. Among them, the air conditioner detects the indoor pollution level through the gas sensor to purify the polluted indoor air, and the cooking device detects the amount of gas generated during cooking through the gas sensor to discharge smoke or gas inside the cooking chamber to the outside. By doing so, bad smell is not discharged to the food.

이와 같이, 다양한 전기제품에 사용되고 있는 가스센서의 이상유무를 검사하기 위해서는 센서 자체의 특성상 초기 안정화시간(센서가 포화되는 시기)이 필요한데, 제조공정이 가스센서의 초기 안정화시간보다 매우 짧기 때문에 가스센서의 동작이상 유무를 정확히 판단하기가 어렵다.As such, the initial stabilization time (time to saturate the sensor) is necessary due to the characteristics of the sensor itself in order to inspect the gas sensor used in various electrical products. The manufacturing process is much shorter than the initial stabilization time of the gas sensor. It is difficult to accurately determine whether there is an operation abnormality.

따라서, 종래에는 가스센서의 동작검사를 위한 공정을 추가하여 가스센서에 전원이 투입되면 센서의 특성상 출력전압이 전원 투입과 동시에 입력전압의 한계까지 올라갔다가 서서히 내려가면서 안정화될 때, 센서의 출력전압이 하이(5V) 또는 로우(0V)로 감지되면 가스센서의 이상으로 판단하여 에러를 발생하였다.Therefore, in the related art, when the power is supplied to the gas sensor by adding a process for the operation inspection of the gas sensor, the output voltage of the sensor is stabilized while the output voltage is stabilized while gradually rising to the limit of the input voltage at the same time as the power is supplied. If this is detected as high (5V) or low (0V), it is determined that the gas sensor is abnormal and an error has occurred.

그런데, 이러한 종래 가스센서의 동작검사방법은 센서의 특성상 출력값이 하이로 올라갔다가 로우로 떨어지면서 안정화되는데, 공정모드에서는 센서의 오픈 또는 쇼트만을 감지하고 센서출력값을 감지하지 않기 때문에 하이 또는 로우값 사이의 전압이 들어오면 센서의 동작이상 유무를 판단할 수 없다. By the way, the operation test method of the conventional gas sensor is stabilized as the output value goes high and then goes low due to the characteristics of the sensor. In the process mode, only the open or short of the sensor is sensed and the sensor output value is not sensed. When the voltage is on, it is impossible to determine whether the sensor is operating abnormally.

이에, 종래에는 센서의 동작이상 유무를 판단하기 위해 알콜 등의 휘발성물질을 센서에 근접시켜 센서의 출력특성을 변화시킴으로서 작업자가 센서의 동작검사를 실시하였다.Thus, in order to determine whether there is an abnormal operation of the sensor, the operator performed an operation test of the sensor by changing a sensor output characteristic by bringing a volatile substance such as alcohol into the sensor.

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위한 것으로, 본 발명의 목적은 휘발성물질로 센서의 출력특성을 변화시켜 작업자가 센서의 동작이 상을 체크하는 공정을 삭제하고, 센서의 특성변화를 체크하여 자체적으로 동작이상 유무를 판단할 수 있는 가스센서의 동작검사방법을 제공하는데 있다.Therefore, the present invention is to solve the conventional problems as described above, the object of the present invention is to change the output characteristics of the sensor to a volatile material, the operator eliminates the process of checking the phase of the sensor, the characteristics of the sensor The present invention provides a method of inspecting the operation of a gas sensor that can determine whether there is an abnormal operation by checking a change.

상기 목적을 달성하기 위하여 본 발명은 가스센서의 동작검사를 위한 공정모드인가 판단하는 단계; 공정모드이면 상기 가스센서의 출력값을 감지하여 센서출력값의 변화량을 산출하는 단계; 및 산출된 센서출력값의 변화량을 미리 정해진 기준값과 비교하여 가스센서의 동작이상 유무를 판단하는 단계를 포함하는 것을 특징으로 한다.In order to achieve the above object, the present invention comprises the steps of determining whether the operation mode of the gas sensor for operation; Calculating a change amount of a sensor output value by detecting an output value of the gas sensor in a process mode; And comparing the calculated change amount of the sensor output value with a predetermined reference value to determine whether there is an abnormal operation of the gas sensor.

또한, 상기 센서출력값의 변화량을 산출하는 단계는, 상기 가스센서의 출력값을 초기 안정화시간동안 감지하여 센서출력값의 기울기변화량을 산출하는 것을 특징으로 한다.The calculating of the change amount of the sensor output value may include calculating an inclination change amount of the sensor output value by sensing the output value of the gas sensor during an initial stabilization time.

또한, 상기 가스센서의 동작이상 유무를 판단하는 단계는, 상기 센서출력값의 변화량이 기준값 범위를 벗어나면 에러모드를 발생하는 것을 특징으로 한다.The determining of the operation abnormality of the gas sensor may include generating an error mode when the amount of change of the sensor output value is out of a reference value range.

또한, 본 발명은 작업자에 의해 가스센서의 동작검사를 위한 명령을 입력하는 단계를 더 포함하고, 작업자에 의한 동작검사명령에 따라 상기 가스센서의 출력값을 감지하여 가스센서의 특성변화를 체크하는 것을 특징으로 한다.In addition, the present invention further includes the step of inputting a command for the operation test of the gas sensor by the operator, by detecting the output value of the gas sensor in accordance with the operation test command by the operator to check the characteristic change of the gas sensor It features.

이하, 본 발명의 일실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 의한 가스센서의 동작검사를 위한 제어 블록도로서, 가스센서(10), 전원을 공급하는 전원부(20), 상기 가스센서(10)의 동작검사를 위한 명령을 입력하는 입력부(30), 전체동작을 제어하는 제어부(40), 상기 가스센서(10)의 정상동작 또는 이상상태를 표시하는 표시부(50), 상기 가스센서(10)의 이상상태를 알리는 "에러"음량을 출력하는 음량출력부(60)를 포함하여 구성된다.1 is a control block diagram for an operation test of a gas sensor according to the present invention, a gas sensor 10, a power supply unit 20 for supplying power, and an input unit for inputting a command for operation test of the gas sensor 10. 30, the control unit 40 for controlling the overall operation, the display unit 50 for displaying the normal operation or abnormal state of the gas sensor 10, the "error" volume indicating the abnormal state of the gas sensor 10 It is configured to include a volume output unit 60 for outputting.

상기 제어부(40)는 공정모드 시 상기 가스센서(10)로부터 입력되는 센서출력값의 변화량(Sa)을 산출하여 그 변화량(Sa)과 미리 정해진 기준값(Sm)을 비교하고, 그 비교결과에 따라 가스센서(10)의 동작이상 유무를 판단한다.The controller 40 calculates a change amount Sa of the sensor output value input from the gas sensor 10 in the process mode, compares the change amount Sa with a predetermined reference value Sm, and compares the gas according to the comparison result. It is determined whether the sensor 10 operates abnormally.

이하, 상기와 같이 구성된 가스센서의 동작검사방법의 동작과정 및 작용효과를 설명한다.Hereinafter, the operation process and the effect of the operation test method of the gas sensor configured as described above will be described.

도 3은 본 발명에 의한 가스센서의 동작검사방법의 동작 흐름도이다.3 is a flowchart illustrating an operation inspection method of a gas sensor according to the present invention.

가스센서(10)가 채용된 전기제품의 제조공정에서 전원이 투입되면(S100), 제어부(40)는 가스센서(10)의 특성상 초기화시간동안 나타나는 출력전압의 변화량을 기준변화량(Sm;가스센서가 정상인 경우 센서출력값의 변화량)으로 설정한다(S110).When the power is turned on in the manufacturing process of the electrical appliance employing the gas sensor 10 (S100), the control unit 40 determines the change amount of the output voltage that appears during the initialization time due to the characteristics of the gas sensor 10 (Sm; gas sensor If is normal, the amount of change in the sensor output value) is set (S110).

이후, 작업자가 키조작 또는 리모콘을 이용하여 가스센서(10)의 동작검사를 위한 명령을 선택하면, 작업자에 의해 선택된 동작검사명령이 입력부(30)를 통해 제어부(40)에 입력된다.Thereafter, when the operator selects a command for operation inspection of the gas sensor 10 by using a key operation or a remote controller, the operation inspection command selected by the operator is input to the controller 40 through the input unit 30.

따라서, 제어부(40)는 가스센서(10)의 동작검사를 위한 공정모드인가를 판단하여(S120), 공정모드이면 가스센서(10)에서 출력전압 즉, 센서출력값을 감지하여 제어부(40)에 입력한다(S130).Therefore, the control unit 40 determines whether the process mode for the operation test of the gas sensor 10 (S120), and in the process mode, the gas sensor 10 detects an output voltage, that is, a sensor output value, to the control unit 40. Input (S130).

상기 제어부(40)에 입력되는 센서출력값은 가스센서(10)가 정상인 경우, 도 2에 도시한 바와 같은 동작 특성을 갖는다.The sensor output value input to the controller 40 has an operating characteristic as shown in FIG. 2 when the gas sensor 10 is normal.

다시 말해서, 가스센서(10)의 특성은 출력전압이 전원 투입과 동시에 입력전 압의 한계까지 올라갔다가 서서히 내려가면서 안정화되는 동작 특성을 갖는 것이다.In other words, the characteristic of the gas sensor 10 is that the output voltage has an operating characteristic that stabilizes as the output voltage rises to the limit of the input voltage at the same time as the power is turned on and then gradually decreases.

따라서, 제어부(40)는 가스센서(10)로부터 입력되는 센서출력값의 시간에 따른 변화량 즉, 기울기변화량(Sa)을 산출하여(S140), 산출된 기울기변화량(Sa)이 미리 설정된 기준변화량(Sm) 이하인가를 판단한다(S150).Accordingly, the control unit 40 calculates the change amount according to time of the sensor output value input from the gas sensor 10, that is, the gradient change amount Sa (S140), and the calculated gradient change amount Sa is a preset reference change amount Sm. It is determined whether or not (S150).

산출된 기울기변화량(Sa)이 기준변화량(Sm) 이하이면, 제어부(40)는 동작검사대상인 가스센서(10)의 출력전압이 도 2에 도시한 바와 같은 동작 특성을 갖는 정상상태라고 판단하여 표시부(50)를 통해 "정상동작"이라는 메시지를 표시한다(S160).If the calculated slope change amount Sa is equal to or less than the reference change amount Sm, the controller 40 determines that the output voltage of the gas sensor 10 that is the operation inspection target is a normal state having an operation characteristic as shown in FIG. 2. In operation S160, a message “normal operation” is displayed.

한편, 산출된 기울기변화량(Sa)이 기준변화량(Sm) 이하가 아니면, 가스센서(10)의 출력전압이 도 2에 도시한 바와 같은 동작 특성을 갖지 않는 이상상태라고 판단하여 표시부(50)를 통해 "에러모드"를 표시함과 동시에 음량출력부(60)를 통해 "에러"음량을 출력하여 작업자에게 가스센서(10)의 불량을 통보해준다.On the other hand, if the calculated slope change amount Sa is not equal to or less than the reference change amount Sm, the display unit 50 is determined by determining that the output voltage of the gas sensor 10 is an abnormal state not having the operating characteristics as shown in FIG. While displaying the "error mode" through the volume output unit 60 outputs the "error" volume to notify the worker of the gas sensor 10 failure.

상기의 설명에서와 같이, 본 발명에 의한 가스센서의 동작검사방법에 의하면, 종래 센서의 오픈 또는 쇼트만을 감지하는 방식에서 센서의 동작이상 유무를 판단하기 위해 휘발성물질로 센서의 출력특성을 변화시켜 작업자가 센서의 동작이상을 체크하는 공정을 삭제하고, 센서의 특성변화를 감지하는 방식으로 자체적으로 동작이상 유무를 판단함으로서 제조공정의 단순화를 이룰 수 있고, 제품의 시장출하 전 불량을 감소시킬 수 있다는 효과가 있다.As described above, according to the operation inspection method of the gas sensor according to the present invention, in order to detect the operation abnormality of the sensor in the manner of detecting only the open or short of the conventional sensor by changing the output characteristics of the sensor with a volatile material By eliminating the process by which the operator checks the abnormal operation of the sensor and by detecting the sensor's characteristic change, it is possible to simplify the manufacturing process and reduce the defect before shipping the product. There is an effect.

상기에서 설명한 것은 본 발명에 의한 가스센서의 동작검사방법을 실시하기 위한 하나의 실시예에 불과한 것으로, 본 발명은 상술한 실시예에 한정되지 않고, 본 발명의 기술적 사상 내에서 당 분야의 통상의 지식을 가진 자에 의하여 여러 가지 변형이 가능함은 물론이다.What has been described above is only one embodiment for carrying out the operation inspection method of the gas sensor according to the present invention, the present invention is not limited to the above-described embodiment, it is within the technical spirit of the present invention Of course, various modifications are possible by those who have knowledge.

Claims (4)

가스센서의 동작검사를 위한 공정모드인가 판단하는 단계;Determining whether the gas sensor is in a process mode for operation inspection; 공정모드이면 상기 가스센서의 출력값을 감지하여 센서출력값의 변화량을 산출하는 단계; 및Calculating a change amount of a sensor output value by detecting an output value of the gas sensor in a process mode; And 산출된 센서출력값의 변화량을 미리 정해진 기준값과 비교하여 가스센서의 동작이상 유무를 판단하는 단계를Comparing the calculated variation of the sensor output value with a predetermined reference value to determine whether there is an abnormal operation of the gas sensor. 포함하는 것을 특징으로 가스센서의 동작검사방법.Operation inspection method of a gas sensor comprising a. 제 1항에 있어서,The method of claim 1, 상기 센서출력값의 변화량을 산출하는 단계는,Calculating the amount of change in the sensor output value, 상기 가스센서의 출력값을 초기 안정화시간동안 감지하여 센서출력값의 기울기변화량을 산출하는 것을 특징으로 하는 가스센서의 동작검사방법.And detecting an output value of the gas sensor during an initial stabilization time to calculate an inclination change amount of the sensor output value. 제 1항에 있어서,The method of claim 1, 상기 가스센서의 동작이상 유무를 판단하는 단계는,Determining whether the gas sensor is abnormal operation, 상기 센서출력값의 변화량이 기준값 범위를 벗어나면 에러모드를 발생하는 것을 특징으로 하는 가스센서의 동작검사방법.And an error mode is generated when the amount of change of the sensor output value is out of a reference value range. 제 1항에 있어서,The method of claim 1, 작업자에 의해 가스센서의 동작검사를 위한 명령을 입력하는 단계를 더 포함하고,The method further includes the step of inputting a command for operation inspection of the gas sensor by an operator. 작업자에 의한 동작검사명령에 따라 상기 가스센서의 출력값을 감지하여 가스센서의 특성변화를 체크하는 것을 특징으로 하는 가스센서의 동작검사방법.And detecting an output value of the gas sensor according to an operation test command by an operator to check a characteristic change of the gas sensor.
KR1020050071877A 2005-08-05 2005-08-05 Method for testing operation of gas sensor KR20070016846A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200073442A (en) * 2018-12-14 2020-06-24 에스케이 주식회사 Method for Checking Sensor of Gas Detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200073442A (en) * 2018-12-14 2020-06-24 에스케이 주식회사 Method for Checking Sensor of Gas Detector

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