WO2011096106A1 - 電気化学的ガス検出装置 - Google Patents
電気化学的ガス検出装置 Download PDFInfo
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- WO2011096106A1 WO2011096106A1 PCT/JP2010/066023 JP2010066023W WO2011096106A1 WO 2011096106 A1 WO2011096106 A1 WO 2011096106A1 JP 2010066023 W JP2010066023 W JP 2010066023W WO 2011096106 A1 WO2011096106 A1 WO 2011096106A1
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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
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4073—Composition or fabrication of the solid electrolyte
- G01N27/4074—Composition or fabrication of the solid electrolyte for detection of gases other than oxygen
-
- 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
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
-
- 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
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/4065—Circuit arrangements specially adapted therefor
-
- 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
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
Definitions
- the present invention relates to a gas detection device using an electrochemical gas sensor, and more particularly to correction of the relative humidity dependency of the gas sensor.
- Patent Document 1 JP2008-58213A
- the conductivity of the proton conductor changes depending on the relative humidity, so that water vapor is supplied from the water reservoir.
- providing a water reservoir increases the size of the gas sensor.
- Patent Document 2 JPH05-39509B (USP4718991) discloses correcting humidity dependence by measuring the impedance of a proton conductor gas sensor.
- the driving circuit of the gas sensor in Patent Document 2 is complicated. Therefore, the inventor studied a practical circuit for correcting the humidity dependence of the proton conductor gas sensor, and reached the present invention.
- JP2008-58213A JPH05-39509B (USP4718991)
- An object of the present invention is to correct the humidity dependence and temperature dependence of an electrochemical gas sensor with a simple circuit.
- the electrochemical gas detection device of the present invention does not include a water reservoir, and corrects the output of the electrochemical gas sensor according to the impedance of the gas sensor, thereby detecting the gas.
- DC power supply At least a pair of resistors connected to a DC power source;
- a buffer amplifier that outputs a potential following the potential between the resistors of the at least one pair of resistors;
- An electrochemical gas sensor comprising a detection electrode, a counter electrode, and a solid electrolyte membrane, wherein one of the detection electrode and the counter electrode is connected to the buffer amplifier;
- a current amplification circuit for amplifying the current flowing through the electrochemical gas sensor;
- An impedance measurement circuit for measuring the impedance of the electrochemical gas sensor;
- a switch for switching the connection destination of the other electrode of the electrochemical gas sensor to a current amplification circuit and an impedance measurement circuit;
- Storage means for storing data of humidity dependence and temperature dependence of the electrochemical gas sensor;
- a temperature sensor for measuring the ambient
- the solid electrolyte membrane is, for example, a proton conductor membrane or a hydroxide ion conductor membrane, and the detection electrode is brought into contact with one surface of the solid electrolyte membrane and the counter electrode is brought into contact with the other surface.
- the voltage of the DC power supply is divided into, for example, 1: 1 by at least a pair of resistors and connected to one electrode of the gas sensor via the buffer amplifier.
- the other electrode of the gas sensor is connected to the current amplification circuit and the impedance measurement circuit through a switch.
- the bias voltage obtained by dividing the DC power supply for example, 1: 1 is applied to the gas sensor, it can be amplified regardless of whether the current flows in the positive or negative direction.
- the switch is switched to shut off the gas sensor and the current amplification circuit, and AC is applied from the AC power supply.
- the AC when the output of the AC power supply is switched between the output potential of the DC power supply and the ground potential, the AC can be easily applied to the series piece of the gas sensor and the resistor.
- Humidity is determined from the impedance of the gas sensor, and the ambient temperature is measured with the temperature sensor. According to the measured impedance value and the ambient temperature, the correction coefficient data is read from the storage means, and the output of the current amplifier circuit is corrected to correct the influence of the ambient humidity and temperature to obtain the gas concentration. it can.
- the relative humidity dependency and the temperature dependency of the gas sensor can be corrected with a simple circuit without a water reservoir.
- the configuration of the AC power source is simplified by configuring the AC power source with an output port of the microcomputer.
- the AC voltage measurement circuit is an AD converter of the microcomputer.
- the alternating current is preferably a rectangular wave whose potential changes between the output potential of the DC power supply and the ground potential.
- Block diagram of the gas detector of the embodiment The figure which shows the processing with the microcomputer Diagram showing AC waveform for impedance measurement
- FIG. 1 shows a circuit example of a detection device.
- a DC power source Vcc such as 2 V is divided by resistors R1 and R2 to 1: 1, for example, to create a bias potential 1/2 Vcc of 1 V, and an electric current is supplied via a buffer amplifier 4.
- Vcc such as 2 V
- R1 and R2 resistors
- an electric current is supplied via a buffer amplifier 4.
- it is added to the counter electrode C of the chemical gas sensor 2.
- the direction of the gas sensor 2 may be reversed from that in FIG. 1 and a bias potential may be applied to the detection electrode W.
- the other detection electrode W of the gas sensor 2 is connected to the switch 10.
- a current amplifying circuit 6 amplifies the current flowing through the gas sensor 2 and AD converts the output V 0 by the AD converter 20 of the microcomputer 8.
- R3 is an impedance measurement resistor such as 1K ⁇ , and the resistance value can be changed in the range of 100 ⁇ to 10K ⁇ .
- + Vcc and 0 V ground potential
- the output port 9 is a switch that switches the output between, for example, + Vcc and 0 V in accordance with a control command from a control unit (not shown) in the microcomputer 8.
- a switch such as a three-state buffer 12 may be provided instead of the output port 9 and controlled by the microcomputer 8 to switch the output potential between Vcc and ground.
- the AC signal applied to the connection point of the resistor R3 and the switch 10 is AD-converted by the AD converter of the microcomputer 8 and used as a signal V1 representing the relative humidity.
- Reference numeral 14 denotes a map made of a storage medium such as an EEPROM, and stores data on the relative humidity dependency and the ambient temperature dependency of the gas sensor 2.
- Reference numeral 16 denotes a temperature sensor such as a thermistor, R4 is a fixed resistor, and a signal V2 at a connection point between the temperature sensor 16 and the resistor R4 is AD converted by the microcomputer 8 to obtain an ambient temperature.
- the gas sensor 2 has a detection electrode and a counter electrode connected to a solid electrolyte membrane such as a proton conductor film, and the electrodes are two electrodes, a detection electrode and a counter electrode.
- the proton conductor membrane is, for example, a polymer solid electrolyte membrane, which is proton conductive, but may be a metal oxide proton conductive solid electrolyte membrane.
- the midpoint potential of the resistors R1 and R2 is not limited to 50% of the DC power supply Vcc, and may be changed, for example, in the range of about 48 to 52%.
- the DC power supply Vcc is not limited to 2V, and may be a voltage of about 1V to 3V, for example.
- the resistor R3 is not limited to a single resistor, and may be composed of a plurality of resistors.
- the switch 10 is controlled by the control unit in the microcomputer 8, and when the three-state buffer 12 is provided, similarly, the control unit of the microcomputer 8 Control by.
- Fig. 2 shows the processing of input signals V0 to V2.
- the AD converter 20 in the microcomputer 8 AD converts these signals, and the signal V0 is proportional to the gas concentration. Since the gas sensor 2 has a relative humidity dependency and an ambient temperature dependency, the relative humidity dependency is corrected by the signal V1, and the ambient temperature dependency is corrected by the signal V2.
- the map 14 describes the dependence of the gas sensor 2 on the ambient temperature and relative humidity.
- the correction coefficient is read by referring to this data as signals V1 and V2, stored in a RAM (not shown) in the microcomputer 8, and stored in the microcomputer. 8 calculates the gas concentration by multiplying the signal V0 by the correction coefficient.
- the detection accuracy of the gas concentration is determined according to the application, for example, high accuracy is used for measurement, and the gas concentration may be classified into a plurality of ranks for air conditioning control.
- the microcomputer 8 includes a timer (not shown) and switches the connection of the switch 10 to the resistor R3 side at an appropriate cycle such as once per hour to once every 6 hours.
- the potential applied to the resistor R3 is between + Vcc and ground (2V and 0V), for example, at a frequency of about 10 Hz to 1 KHz, for example, over several cycles. Change. For this reason, while the connection of the switch 10 is switched to the resistor R3 side, the control unit in the microcomputer 8 changes the output of the output port 9 between 0V and + Vcc.
- the counter electrode of the gas sensor 2 Since the counter electrode of the gas sensor 2 is fixed at a bias potential such as 1/2 Vcc, an alternating current consisting of a rectangular wave with an amplitude Vcc is applied to the series piece of the gas sensor 2 and the resistor R3 for several cycles.
- the voltage applied to the gas sensor 2 is limited by the resistor R3, and the AC signal V1 applied to the connection portion of the resistor R3 and the switch 10 is AD-converted by the AD converter 20, and the gas sensor 2 is determined from the amplitude, peak value, effective value, etc. of the AC signal V1. Measure the impedance.
- This impedance is mainly due to the resistance of the gas sensor 2, in particular, the resistance of the solid electrolyte membrane, the detection electrode and the counter electrode, and the contribution of the capacitance component is small.
- the measurement accuracy may be such that the impedance can be divided into several ranks. However, the impedance may be measured more accurately and more accurate humidity correction may be performed.
- the alternating current is added, for example, for about 1 to 10,000 cycles, and the time for applying the alternating current is, for example, 1 msec to 10 seconds.
- the voltage waveform for AD conversion is not limited to the potential between the resistor R3 and the switch 10, but may be a potential waveform between the gas sensor 2 and the switch 10 or a voltage waveform obtained by dividing the voltage applied to the resistor R3.
- an arbitrary AC voltage measurement circuit that measures the resistance of the gas sensor 2 by adding the amplitude + Vcc to the series circuit of the resistor R3 and the gas sensor 2 can be used.
- an alternating current consisting of a sine wave may be added instead of the rectangular wave.
- a DA converter is used instead of the output port 9.
- the map 14 may be stored in a ROM or the like inside the microcomputer 8 or in a memory outside the microcomputer 8.
- the map 14 is composed of, for example, a two-dimensional table. One dimension is a signal V1 for washing the impedance of the gas sensor 2, and the other dimension is a signal V2 for washing the ambient temperature.
- the correction coefficient can be read from the signals V1 and V2. Like that.
- the following effects can be obtained.
- a water reservoir for supplying water vapor to the electrochemical gas sensor is not required.
- Impedance can be measured simply by adding the switch 10 and the resistor R3 to the circuit for driving the gas sensor 2.
- the AC power source is configured by the output port of the microcomputer 8, the AC power source can be configured particularly easily.
- both the temperature dependency data and the relative humidity dependency data of the gas sensor 2 are stored in the map 14 and the thermistor 16 is provided, both the humidity dependency and the temperature dependency can be corrected.
- Electrochemical gas sensor 4
- Buffer amplifier 6
- Current amplification circuit 8
- Microcomputer 9
- Output port 10
- Switch 12
- Three-state buffer 14
- Map Thermistor
- AD converter 22
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Abstract
Description
直流電源と、
直流電源に接続された少なくとも一対の抵抗と、
前記少なくとも一対の抵抗での抵抗間の電位に追随した電位を出力するバッファ増幅器と、
検知極と対極と固体電解質膜とを備え、前記バッファ増幅器に検知極と対極の一方が接続された電気化学的ガスセンサと、
電気化学的ガスセンサを流れる電流を増幅する電流増幅回路と、
電気化学的ガスセンサのインピーダンスを測定するインピーダンス測定回路と、
電気化学的ガスセンサの他極の接続先を、電流増幅回路とインピーダンス測定回路とに切り替えるスイッチと、
電気化学的ガスセンサの湿度依存性と温度依存性とのデータを記憶する記憶手段と、
周囲温度の測定用の温度センサと、
前記インピーダンス測定回路の出力信号と前記温度センサの出力信号とに応じて前記記憶手段のデータを読み出して、該データにより前記電流増幅回路の出力信号を補正することによりガス濃度を求めると共に、前記スイッチを制御するマイクロコンピュータ、とを備え、
前記インピーダンス測定回路は、前記スイッチに一端側が接続された抵抗と前記抵抗の他端側の電位を前記直流電源の出力電位とグラウンド電位との間で切り替える交流電源と、電気化学的ガスセンサに加わる交流電圧を測定する交流電圧測定回路とからなる、ことを特徴とする。
(1) 電気化学的ガスセンサに水蒸気を供給するための水溜が不要になる。
(2) ガスセンサ2を駆動するための回路に、スイッチ10と抵抗R3等を追加するだけで、インピーダンスを測定できる。
(3) 交流電源をマイクロコンピュータ8の出力ポートで構成すると、特に簡単に交流電源を構成できる。
(4) マップ14にガスセンサ2の温度依存性と相対湿度依存性の双方のデータを記憶させ、サーミスタ16を設けると、湿度依存性と温度依存性の双方を補正できる。
4 バッファ増幅器
6 電流増幅回路
8 マイクロコンピュータ
9 出力ポート
10 スイッチ
12 スリーステートバッファ
14 マップ
16 サーミスタ
20 ADコンバータ
22 ガス濃度算出部
R1~R4 抵抗
Claims (4)
- 水溜を備えず、電気化学的ガスセンサの出力を前記ガスセンサのインピーダンスに応じて補正することにより、ガスを検出するガス検出装置において、
直流電源と、
直流電源に接続された少なくとも一対の抵抗と、
前記少なくとも一対の抵抗での抵抗間の電位に追随した電位を出力するバッファ増幅器と、
検知極と対極と固体電解質膜とを備え、前記バッファ増幅器に検知極と対極の一方が接続された電気化学的ガスセンサと、
電気化学的ガスセンサを流れる電流を増幅する電流増幅回路と、
電気化学的ガスセンサのインピーダンスを測定するインピーダンス測定回路と、
電気化学的ガスセンサの他極の接続先を、電流増幅回路とインピーダンス測定回路とに切り替えるスイッチと、
電気化学的ガスセンサの湿度依存性と温度依存性とのデータを記憶する記憶手段と、
周囲温度の測定用の温度センサと、
前記インピーダンス測定回路の出力信号と前記温度センサの出力信号とに応じて前記記憶手段のデータを読み出して、該データにより前記電流増幅回路の出力信号を補正することによりガス濃度を求めると共に、前記スイッチを制御するマイクロコンピュータ、とを備え、
前記インピーダンス測定回路は、前記スイッチに一端側が接続された抵抗と前記抵抗の他端側の電位を、前記直流電源の出力電位とグラウンド電位との間で切り替える交流電源と、電気化学的ガスセンサに加わる交流電圧を測定する交流電圧測定回路とからなる、ことを特徴とする、電気化学的ガス検出装置。 - 前記交流電源が前記マイクロコンピュータの出力ポートからなることを特徴とする、請求項1の電気化学的ガス検出装置。
- 前記交流電圧測定回路が前記マイクロコンピュータのADコンバータであることを特徴とする、請求項2の電気化学的ガス検出装置。
- 前記交流電源の出力は矩形波であることを特徴とする、請求項3の電気化学的ガス検出装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10845238.4A EP2533038A4 (en) | 2010-02-04 | 2010-09-16 | ELECTROCHEMICAL GAS DETECTION DEVICE |
JP2011552642A JP5377670B2 (ja) | 2010-02-04 | 2010-09-16 | 電気化学的ガス検出装置 |
KR1020127015918A KR101302531B1 (ko) | 2010-02-04 | 2010-09-16 | 전기화학적 가스검출장치 |
US13/521,270 US20120290222A1 (en) | 2010-02-04 | 2010-09-16 | Electrochemical gas detection device |
CN201080061736.XA CN102713596B (zh) | 2010-02-04 | 2010-09-16 | 电化学气体检测装置 |
Applications Claiming Priority (2)
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JP2010-022896 | 2010-02-04 | ||
JP2010022896 | 2010-02-04 |
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WO2011096106A1 true WO2011096106A1 (ja) | 2011-08-11 |
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PCT/JP2010/066023 WO2011096106A1 (ja) | 2010-02-04 | 2010-09-16 | 電気化学的ガス検出装置 |
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US (1) | US20120290222A1 (ja) |
EP (1) | EP2533038A4 (ja) |
JP (1) | JP5377670B2 (ja) |
KR (1) | KR101302531B1 (ja) |
CN (1) | CN102713596B (ja) |
WO (1) | WO2011096106A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2711700A1 (en) | 2012-09-25 | 2014-03-26 | Figaro Engineering Inc. | Electrochemical gas sensor and mounting structure therefor |
JP2014130017A (ja) * | 2012-12-28 | 2014-07-10 | Figaro Eng Inc | ガス検出装置 |
US20150369774A1 (en) * | 2011-09-08 | 2015-12-24 | Brk Brands, Inc. | Carbon Monoxide Sensor System and Method |
JP2019120655A (ja) * | 2018-01-11 | 2019-07-22 | フィガロ技研株式会社 | Co検出装置の温度補正係数の設定方法 |
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KR102253148B1 (ko) | 2014-04-28 | 2021-05-18 | 삼성전자주식회사 | 냄새를 측정하는 후각 감지 장치 및 방법 |
CN105466977B (zh) * | 2015-11-19 | 2017-12-12 | 河南驰诚电气股份有限公司 | 适用于多种气体传感器的信号处理模块 |
JP2019078676A (ja) * | 2017-10-26 | 2019-05-23 | トヨタ自動車株式会社 | 内燃機関のSOx指標取得装置 |
CN114152654B (zh) * | 2021-11-18 | 2024-03-26 | 国网山东省电力公司电力科学研究院 | 一种大气可溶盐沉积量监测装置及测量方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62172256A (ja) * | 1986-01-27 | 1987-07-29 | Figaro Eng Inc | プロトン導電体ガス検出装置 |
US4718991A (en) | 1986-01-27 | 1988-01-12 | Figaro Engineering Inc. | Proton conductor gas sensor and method of detecting gas using proton conductor gas sensor |
JPH03277961A (ja) * | 1990-03-27 | 1991-12-09 | Matsushita Electric Works Ltd | 電気化学式ガスセンサ |
JPH1123527A (ja) * | 1997-07-02 | 1999-01-29 | Figaro Eng Inc | 二酸化炭素検出装置 |
JP2008058213A (ja) | 2006-09-01 | 2008-03-13 | Figaro Eng Inc | 液体電気化学ガスセンサ |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4042464A (en) * | 1975-10-10 | 1977-08-16 | Energetics Science, Inc. | Method for the detection and measurement of noxious gases |
US6241873B1 (en) * | 1997-02-20 | 2001-06-05 | Tdk Corporation | Sold electrolytes, carbon dioxide sensors and method for correcting the output of sensors |
JP2001153837A (ja) * | 1999-11-24 | 2001-06-08 | Ngk Spark Plug Co Ltd | ガス濃度検出器及びガス濃度測定方法 |
CN1453578A (zh) * | 2002-04-23 | 2003-11-05 | 马立文 | 气敏传感器温度补偿电路 |
CN1734262B (zh) * | 2004-08-13 | 2010-09-01 | 杭州生源医疗保健技术开发有限公司 | 固体聚合物电解质电化学传感器及用其检测气体的方法 |
JP2006343306A (ja) * | 2004-11-15 | 2006-12-21 | Denso Corp | ガス濃度検出装置 |
JP4927639B2 (ja) * | 2007-05-07 | 2012-05-09 | ホーチキ株式会社 | ガス警報器 |
-
2010
- 2010-09-16 CN CN201080061736.XA patent/CN102713596B/zh not_active Expired - Fee Related
- 2010-09-16 KR KR1020127015918A patent/KR101302531B1/ko not_active IP Right Cessation
- 2010-09-16 US US13/521,270 patent/US20120290222A1/en not_active Abandoned
- 2010-09-16 WO PCT/JP2010/066023 patent/WO2011096106A1/ja active Application Filing
- 2010-09-16 JP JP2011552642A patent/JP5377670B2/ja not_active Expired - Fee Related
- 2010-09-16 EP EP10845238.4A patent/EP2533038A4/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62172256A (ja) * | 1986-01-27 | 1987-07-29 | Figaro Eng Inc | プロトン導電体ガス検出装置 |
US4718991A (en) | 1986-01-27 | 1988-01-12 | Figaro Engineering Inc. | Proton conductor gas sensor and method of detecting gas using proton conductor gas sensor |
JPH03277961A (ja) * | 1990-03-27 | 1991-12-09 | Matsushita Electric Works Ltd | 電気化学式ガスセンサ |
JPH1123527A (ja) * | 1997-07-02 | 1999-01-29 | Figaro Eng Inc | 二酸化炭素検出装置 |
JP2008058213A (ja) | 2006-09-01 | 2008-03-13 | Figaro Eng Inc | 液体電気化学ガスセンサ |
Non-Patent Citations (1)
Title |
---|
See also references of EP2533038A4 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150369774A1 (en) * | 2011-09-08 | 2015-12-24 | Brk Brands, Inc. | Carbon Monoxide Sensor System and Method |
EP2711700A1 (en) | 2012-09-25 | 2014-03-26 | Figaro Engineering Inc. | Electrochemical gas sensor and mounting structure therefor |
US8815065B2 (en) | 2012-09-25 | 2014-08-26 | Figaro Engineering Inc. | Electrochemical gas sensor and mounting structure therefor |
JP2014130017A (ja) * | 2012-12-28 | 2014-07-10 | Figaro Eng Inc | ガス検出装置 |
JP2019120655A (ja) * | 2018-01-11 | 2019-07-22 | フィガロ技研株式会社 | Co検出装置の温度補正係数の設定方法 |
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CN102713596A (zh) | 2012-10-03 |
KR20120093391A (ko) | 2012-08-22 |
CN102713596B (zh) | 2014-07-02 |
JPWO2011096106A1 (ja) | 2013-06-10 |
EP2533038A1 (en) | 2012-12-12 |
US20120290222A1 (en) | 2012-11-15 |
EP2533038A4 (en) | 2014-12-10 |
KR101302531B1 (ko) | 2013-09-02 |
JP5377670B2 (ja) | 2013-12-25 |
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