WO2000065334A1 - Procede et dispositif de detection de gaz exhale - Google Patents

Procede et dispositif de detection de gaz exhale Download PDF

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Publication number
WO2000065334A1
WO2000065334A1 PCT/JP2000/002714 JP0002714W WO0065334A1 WO 2000065334 A1 WO2000065334 A1 WO 2000065334A1 JP 0002714 W JP0002714 W JP 0002714W WO 0065334 A1 WO0065334 A1 WO 0065334A1
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WO
WIPO (PCT)
Prior art keywords
gas
value
expiration
sensor
gas sensor
Prior art date
Application number
PCT/JP2000/002714
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English (en)
Japanese (ja)
Inventor
Mitsuharu Kira
Junko Yanagidani
Nobuaki Murakami
Takashi Matsumoto
Original Assignee
Fis Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fis Inc. filed Critical Fis Inc.
Priority to JP2000614023A priority Critical patent/JP4477780B2/ja
Priority to AU41423/00A priority patent/AU4142300A/en
Publication of WO2000065334A1 publication Critical patent/WO2000065334A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/483—Physical analysis of biological material
    • G01N33/497—Physical analysis of biological material of gaseous biological material, e.g. breath
    • 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
    • G01N27/122—Circuits particularly adapted therefor, e.g. linearising circuits
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B2010/0083—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements for taking gas samples
    • A61B2010/0087—Breath samples

Definitions

  • the present invention relates to a breath gas detection method for detecting alcohol components and a bad breath factor gas component, and a device therefor.
  • metal oxide ⁇ body gas sensors fluctuate the gas sensitivity and the resistance value in the gas due to interference by gas components that are not to be detected, and it is not easy to obtain a means to correct the fluctuation. , Not enough accuracy; ⁇ could not be obtained.
  • the bad breath checker using the gas detection method described above (Refer to Japanese Utility Model Application Laid-Open No. 644-2420.) As mentioned above, it takes time s from detection of impact to detection, and the resistance of gas in gas is ⁇ m. Also, there was a P theme that accuracy deteriorated due to the influence of the atmosphere. ; Disclosure of the invention
  • the present invention has been made in view of the following points.
  • the purpose of the present invention is to achieve high reproducibility, high accuracy, and high efficiency even if the time from input to gas detection is shortened. Is to use a small expiration gas detection method. That is, the expiration gas detection method of the present invention starts the energization of the ⁇ J1 oxide gas sensor and generates high ⁇ ] D heat according to the operation start signal, and exhales the high oxygen gas gas during the high D heat. Spraying is performed based on a change in the resistance value of the metal oxide semiconductor gas sensor caused by the expiration of the exhaled gas, and the height of the oxide semiconductor gas sensor is stopped based on this detection to reduce the flow rate. After being in the low state, the resistance value of the oxide gas sensor at the time of Si ⁇ Si ⁇ is detected, and based on the detected value, the temperature of the gas during exhalation is detected. It is characterized by the detection of the gas components.
  • the gas component is heated to a temperature higher than that of the metal oxide semiconductor gas sensor before being turned on.
  • gas can be detected in a short time from the start of energization, and the change of the observation value when exhaled air is blown into the oxygen semiconductor gas sensor under high temperature conditions is changed to ⁇ b ⁇ .
  • As a trigger for the timing of the generation of gas it is easy to determine the timing of the transition to the low state, and the time from the expiration of the exhalation to the time of obtaining the response of the body oxide sensor can be shortened, and the state can be further increased After exposing with
  • the resistance value was determined immediately before or after the detection of exhaled breath under high temperature heating conditions, and the resistance value was calculated based on the withdrawal value. It is preferable to detect a gas component of interest in tine exhalation by comparing the value of the ratio with the ffjfESmffi resistance value with the value of a preset reference ratio. As for this ⁇ , it is possible to cancel the fluctuation component equivalent to the high-temperature state and high-precision detection is possible.
  • ⁇ can quickly detect the expiration in fit ⁇ .
  • the expiration of the exhaled gas is detected by a resistance of a fiJlE ⁇ S acid sensor based on a change in a gas component in the exhaled gas.
  • expiration blowing can be detected quickly and reliably.
  • the predetermined time elapse is within a period before the resistance of the firf metal semiconductor gas sensor is stabilized. Thereby, the time until the detection can be further shortened.
  • the gas component to be detected is preferably alcohol.
  • This ⁇ can perform the alcohol detection;
  • the gas component to be detected is preferably a bad breath-causing gas component.
  • This ⁇ can be a mouth ⁇ method that produces the effects of the invention described above. It is a further object of the present invention to provide a breath gas detection device which has a high accuracy even when the time from gas introduction to gas detection is shortened 14 and which has high accuracy and small power consumption. That is, the expiration gas detection device of the present invention comprises an oxide gas sensor, a heater for powering the oxygen gas sensor, and an operation signal.
  • the energization of the tin heater is controlled so that the temperature of the body gas sensor becomes high, and under the high temperature condition, the expiration of the exhaled gas is detected by the oxygen gas sensor based on the change in the resistance value of the tut oxygen sensor. Then, based on the detection, the heater control means for controlling the energization of the self-heater so that the temperature of the gas sensor becomes low, the power of the gas sensor for the sulfur gas, and the temperature and temperature of the gas sensor for the ⁇ fS acid gas.
  • the resistance value of the oxide gas sensor is detected at the point of time ⁇ , and during the expiration, the resistance value of the oxide gas sensor is detected based on the fiber resistance value.
  • a detecting means for detecting a gas component of the contained intellectual fiber is provided.
  • the gas component is made to go to the metal oxide semiconductor gas sensor at high temperature and then to the i & mid K state.
  • the response of the sensor resistance can be made to appear between the temples.As a result, gas detection can be performed in a short time from the start of electricity supply. Since the change is used as a trigger for the opening and closing of the state, the timing of the opening of the state can be easily determined, and the time from the expiration of the expiration to the time when the response of the body gas sensor from the patient is obtained is increased.
  • the expiration gas is detected with the above-described exhaled gas detection device by using an excimer acid sensor of the exhalation gas sensor. In this case, the expiration of expiration can be detected quickly and accurately.
  • the expiration of the exhaled gas is detected by a fiber sensor of an oxide sensor based on a gas component and a change in the exhaled gas. In this case also, expiration of expiration can be detected quickly and reliably.
  • the reversal point for a certain period of time is within a certain period before the resistance of the metal oxide semiconductor gas sensor is stabilized. This has the effect of shortening the time until detection.
  • the gas component to be detected is preferably alcohol.
  • This ⁇ can provide an alcohol detection device having the effects of the above-described invention.
  • the gas component to be detected is a bad breath factor gas.
  • ⁇ can be a mouth: ⁇ sensing device that has the effect of the invention described above.
  • FIG. 1 is a specific circuit diagram of an embodiment of the breath detection device of the present invention.
  • FIG. 2 is a timing chart for explaining the operation of the above air pollution detection.
  • FIG. 3 is a timing chart for explaining the operation of the ⁇ M Hb #) body gas sensor when there is no bad breath in the above-mentioned bad breath factor gas detection.
  • Fig. 4 is a timing chart for explaining the operation of the metal oxide gas sensor when there is bad breath in the above-mentioned bad breath factor gas detection.
  • FIG. 5 is a timing chart for explaining the operation of the metal oxide gas sensor at the time of alcohol synthesis in the alcohol detection.
  • FIG. 6 is a timing chart for operation of the metal oxide semiconductor semiconductor gas sensor when an alcohol component is present in the alcohol detection.
  • an exhaled gas detector for example, a gas detector constituting a bad breath checker is configured, and FIG. 1 shows a circuit diagram of the embodiment.
  • a low-voltage (for example, '3 V) battery 1 such as a dry cell or a rechargeable battery and a heater 2 are embedded in a gas-sensitive body for detecting gas, and both ends of the heater 2 2) and the output of the gas sensor connected to one end of the gas-sensing body 1) 3) a highly-structured heat-responsive acid gas sensor 3 and a liquid crystal table (hereinafter referred to as LCD and ⁇ ). 4)
  • the means for passing through the heater 2 and the means for detecting the carried fiber gas are programmed and the LCD 4 is equipped with a dry function.
  • the main components are a microcomputer (hereinafter abbreviated as “microcomputer”) 5 that performs processing, and an EEPROM 6 that is data used as a reference for determining the degree of bad breath.
  • the metal oxide gas sensor 3 has a resistance value between the output rice cake and the ground end of the heater 2 ′ ⁇ KD.
  • the heater 2 is connected via a PNP transistor Q1.
  • the gas-sensitive body is connected via a parallel circuit of a series circuit of PN p-type transistors Q2 and 2 and a series circuit of PNP-type transistor Q3 and a resistor R9. When the transistor Q2 or Q3 or both are on, the voltage VS across the gas-sensitive body is generated by the current flowing through the resistor R2 or R9 or the parallel circuit of both resistors.
  • the microcomputer 5 calculates the resistance value of the gas sensing material at both ends 3 ⁇ 4EV s.
  • the microcomputer 5 receives the power by connecting the power supply J terminal V to the battery power supply 1 via the diode D 1, and connects the middle point of the series circuit of the start switch SW and the resistor R 5 indicated by the arrow to the input port I 2.
  • H level control processing for gas detection is started according to the program.
  • the microcomputer 5 sets the midpoint to the base of the transistor Q1, and connects the other end of the series circuit of the resistors R3 and R4, one end of which is connected to the positive pole of the power supply 1, to the output port ⁇ 1.
  • Output port O Outputs a panless signal for duty control.
  • a function is provided to turn on the heater 2 by turning on and off the star Q1, and by using this function, the on-duty of the transistor Q1 is extended to force the metal oxide semiconductor gas sensor 3 to a high-temperature state or, conversely, to shorten it. By doing so, the heating control to be in the inactive state is performed.
  • microcomputer 5 outputs the bias circuit of the transistor Q2 as an output port.
  • the base current flows to the corresponding transistors Q2 and Q3 to turn them on.
  • the resistances R 2 and R 9 are connected between the resistance R s and the positive pole of 1. In other words, it has the ability to switch the load resistance.
  • the microcomputer 5 assigns the input terminals ID1 to ID4 of the LCD 4 to the output ports Ol1 to 014, the input ID5 and ID6 to the output port Ol5, and the input terminal I to the output port Ol6.
  • Input D7 and ID8 to output port Ol 7 ⁇ ? "ID9 and ID10, and output port Ol 8 to input ⁇ ID11 and ID12, and output port Ol9 to input terminals ID13 and ID14 and output Port O 20 has inputs ⁇ ID 15 and ID 16, respectively, and has a common channel of 04.
  • Ml is converted to output port O 2 and output from output ports Ol 1 to 020 and 02.
  • the character display of L CD 4 is now controlled.
  • the microcomputer 5 takes in the voltage of the shunt regulator 7 into the input port I3, and when the voltage of the shunt regulator 7 becomes lower than a predetermined value, the microcomputer 5 detects that the shunt has run out. ⁇ .
  • the shunt regulator 7 is adapted to stabilize the rnmmiE to a predetermined ma, being disliked by the pond irni via the transistor Q2 and the resistor R1.
  • the EEPROM 6 is used for registering a reference for detecting a gas detected by a known method.
  • the semiconductor gas sensor under high temperature conditions is used.
  • the value of i3 ⁇ 43 ⁇ 4R 0 of the gas sensing element of (3) and the value of 3 ⁇ 43 ⁇ 4tR s ( ⁇ and the ratio R s / RO of the two when switching from high temperature to low The value of the ratio is used as a basis for the detection of bad breath gas (eg, carbon, carbon, ammonia, or methyl menolecabutane), ie, the detection of mouth-to-mouth.
  • bad breath gas eg, carbon, carbon, ammonia, or methyl menolecabutane
  • the EEPROM 6 connects the data input DI, the serial clock terminal SR, and the chip selector terminal CS to the data output port do, output ports 021, ⁇ 22 of the microcomputer 5, respectively, and pulls up with the resistors R7, R8, R6 respectively. ing.
  • the data output terminal DO is connected to the data input terminal di of the microcomputer 5.
  • Input 04 is input 101 to 1016 and communication l COM1 is boosted by a resistor, respectively.
  • the characters corresponding to this word are displayed, and ID1 to ID4 correspond to the concentration of the bad breath factor gas, that is, the degree of bad breath, respectively, to the ⁇ "character, and ID5 to ID5.
  • ID16 corresponds to a character such as a person displayed on both sides of the character indicating the observation, and if the concentration of the bad breath gas increases, the wheat It becomes steep.
  • number 8 is a reset IC that gives a reset signal to microcomputer 5 when power is turned on to reset it
  • number 9 is a reference clock to the microcomputer
  • # 10 is a clock generation circuit.
  • Connector. C1 to C3 are capacitors.
  • the microcomputer 5 when mi i is reset, the microcomputer 5 is reset by reset I C8i t! And the right is set. Thereafter, the microcomputer 5 operates in the low-consumption mode to be in a state. In this state, the setting for the output port 03 of the microcomputer 5? "When the start switch SW is turned on with the connection between the ADJ and the ground, the microcomputer 5 rises to the input level of the input port I2, that is, when the operation start signal is input, the microcomputer 5 The operation state of the pre-programmed mode is entered, and a pulse signal is generated from the output port Ol with a period of, for example, 8.2 msec and a low voltage period of 96 ⁇ s.
  • the transistor Q1 is turned on and off with a duty of 9600 ⁇ sec and a period of 8.2 mssec, and the heater 2 is supplied with an easy-going power during the ON period.
  • the flat voltage applied to the heater 2 becomes approximately 1 OV by the duty control, so that the amount of heat in the heater 2 is large, and the acid gas sensor 3 is heated to a high temperature state.
  • the microcomputer 5 outputs a signal to turn on the transistors Q2 and Q3 (or only Q2 or Q3) in synchronization with the off period of the transistor Q1.
  • the microcomputer 5 outputs a low signal from the output port # 1.
  • the level period is switched to 75 ⁇ sec, and the on-duty of the transistor Q1 is set to 75 ⁇ sec while maintaining the cycle.
  • the average applied to the heater 2 through the transistor Q1 is reduced to approximately 0.3 V, and the amount of the heater 2 is reduced. Therefore, the dormitory-body gas sensor 3 is opened from the high temperature state.
  • the microcomputer 5 when switching from the high temperature state to the low temperature tl state, and when the transistor Q1 is turned off, the microcomputer 5 is at the right time. Both ends of the gas sensing element of sensor 3 ⁇ ⁇ V s are taken into input port I 1, and the sensed SEV S and load resistance and value are used to calculate the gas sensing element base of oxygen gas sensor 3 3 ⁇ 45 resistance R Calculate 0.
  • the microcomputer 5 starts to operate at a low temperature.
  • the voltage between both ends of the gas sensor of the gas sensor 3 is input to the input port I1, and the value R s of the gas sensor of the oxide gas sensor 3 is obtained from the input voltage, load resistance, and easy value.
  • the microcomputer 5 When the above adjustment mode ends, the microcomputer 5 returns to the state. Then, after the connection between the adjustment terminal ADJ and the ground is released, if the start switch SW1 is turned off, the microcomputer 5 will open the communication mode.
  • the microcomputer 5 is in the state of power s.
  • the microcomputer 5 is turned on after the conversion processing.
  • the operation in the mode is started, and the data is read out to the EEPROM 6 first, stored in the built-in RAM, and the base used for detecting the degree of bad breath is set.
  • the microcomputer 5 sets the period from the output port O1 to 8.2 msec and the low level period to 960 ⁇ s. Generate an ec pulse signal.
  • the transistor Q1 is turned on and off with a duty cycle of 960 ⁇ sec and a period of 8.2 msec, and during the ON period, the heater 2 of the body gas sensor 3 receives a signal from the heater 1 from the switch 1, As in the case of ⁇ 3 ⁇ , the oxygen gas sensor 3 is brought to a high temperature state.
  • the microcomputer 5 samples the voltage between both ends of the gas sensing body at the timing of turning off the transistor Q 1 every 0.5 sec, calculates the resistance value R s of the gas sensing body, and calculates the resistance obtained by the current sampling. The ratio between the value R s and the resistance value R S obtained by the previous sampling is calculated every 0.5 sec.
  • the microcomputer 5 detects that expiration has been blown.
  • the microcomputer 5 detects and determines the pollution of the atmosphere (air pollution) immediately after the above-described breath detection, and interrupts the breathing operation when it determines that the atmosphere is polluted. That is, as shown in FIG. 2, the resistance value Rs of the gas-sensitive body of the metal oxide semiconductor gas sensor 3 detected at the sampling immediately after the exhalation detection opening point ta and the resistance value Rs detected in the adjustment mode and contained in the EEPROM 6 ⁇ Calculate the ratio of ⁇ 5 ⁇ value to R 0, and the obtained value is smaller than a predetermined value (for example, 0.2):: ⁇ is increasing, that is, the cleaning direction in which ⁇ value R s increases The microcomputer 5 stops the detection operation and returns to the state, judging that the age is in a polluted state where it is impossible to detect bad breath, and displays on the LCD 4 that the air pollution is present.
  • a predetermined value for example, 0.2
  • Fig. 2 shows a diagram of this air pollution judgment, in which the curves A, A, and R show the change in R s R R 0 from the timing ta of the air pollution level and the age call timing.
  • B shows the change of RsZRO in the air pollution state
  • C shows that the air pollution was higher and the expiration was blown.
  • the value of RsZRO indicates the direction of cleanliness
  • ⁇ indicates the expiration detection limit
  • ⁇ indicates the air pollution and intellectual limit point.
  • the microcomputer 5 For good atmospheric pollution, the microcomputer 5 must be able to use the known signal for 1 se, for example, at the time of the call. At the time point, the microcomputer 5 outputs the noiseless signal with the on-duty of the transistor Q1 at 75 ⁇ sec while maintaining the period. The output from Ol is set to the low state of the metal gas sensor 3.
  • the resistance value of the gas-sensitive material sampled at this opening point is stored in the built-in RAM as a resistance value R0, and the ratio with the resistance value Rs obtained by sampling every 0.5 sec thereafter. Operate R s ZR 0 '. Then, the ratio of the calculated value 2 seconds after the start of the state tree to the base f (R s / R 0) obtained in the adjustment mode is obtained, and the degree of bad breath is determined directly from the ratio. The character corresponding to the bad breath degree is displayed on the LCD4. After a certain period of time, the microcomputer 5 returns to the ⁇ state, and the display of LCD 4 is also turned off.
  • FIGS. 3 and 4 show the state of Rs R0 (or RsZRO ') from the time point t1 when the start switch SW operates, from the high-temperature state to the time point 13 when the switch is in the ⁇ state.
  • Figure 3 shows that the value of R s / RO 'obtained at the time t 3 force, 2 sec 3 ⁇ 4i ⁇ B temple point t 4 is 25, and
  • Figure 4 shows that the time t 3 is 2 sec 3 ⁇ 41 time t It shows that the value of R s / RO 'obtained in 4 is 8.
  • t2 indicates the time of call notification.
  • the microcomputer 5 always checks the value of the shunt regulator 7 and judges that the battery has run out if the value falls below a predetermined value. ? Display til out.
  • the above-described embodiment constitutes a bad breath checker, it can be used as an alcohol check force for measuring blood alcohol concentration.
  • the alcohol concentration in the blood can be detected by using the fact that the ingested alcohol dissolves in the liquid and the alcohol component is contained in the breath via the lungs.
  • the oxygen gas sensor 3 sets the resistance value to the value suitable for alcohol detection, and sets the base value (R s )
  • the measurement frequency (R s ZR 0,), and the ratio may be programmed in advance.
  • the presence / absence and concentration of the target gas are determined by comparing RsZRO ′ and the residual RsZRO, but the detection resistance value Rs of the metal oxide based gas sensor 3 and the reference resistance It may be done by comparing with the value.
  • the value after a period of detection of the expiration of the expiratory blowing force under the high birth condition is used as the base m3 ⁇ 43 ⁇ 4t value R0 '.
  • the resistance value obtained by sampling immediately before detection may be used.
  • ⁇ is power.

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Abstract

L'invention concerne un procédé et un dispositif de détection de gaz. Dans ce procédé, l'intervalle nécessaire entre le moment de l'actionnement de l'alimentation et le moment où la détection de gaz devient possible est bref. Un micro-ordinateur (5) émet une impulsion pour actionner un transistor (Q1) 75νs après la détection d'un gaz exhalé, de manière à réduire la tension moyenne devant être appliquée à un dispositif chauffant (2), et provoque le passage de la température d'un capteur (3) de gaz semi-conducteur d'oxyde métallique à un état de chauffe de température inférieure. La valeur de résistance du capteur de gaz, échantillonnée au moment précis où ce passage commence, est stockée dans une mémoire vive incorporée en tant que valeur de résistance de référence RO', et les rapports Rs/RO' sont alors calculés, Rs étant une valeur de résistance obtenue par un échantillonnage effectué à chaque 0,5s. Par ailleurs, le rapport entre la valeur calculée obtenue 2s après le début du passage à l'état de chauffe de température inférieure et la valeur de référence (Rs/RO) obtenue dans le mode de réglage est également calculé. Sur la base de ce rapport, on détermine le degré de mauvaise haleine, et un caractère correspondant au degré de mauvaise haleine ainsi déterminé s'affiche sur un écran LCD (4).
PCT/JP2000/002714 1999-04-27 2000-04-26 Procede et dispositif de detection de gaz exhale WO2000065334A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000614023A JP4477780B2 (ja) 1999-04-27 2000-04-26 呼気ガス検知方法及びその装置
AU41423/00A AU4142300A (en) 1999-04-27 2000-04-26 Exhaled gas detecting method and device therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11954799 1999-04-27
JP11/119547 1999-04-27

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WO2000065334A1 true WO2000065334A1 (fr) 2000-11-02

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AU (1) AU4142300A (fr)
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WO (1) WO2000065334A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002318215A (ja) * 2001-02-16 2002-10-31 Figaro Eng Inc ガス検出方法とその装置
JP2009042166A (ja) * 2007-08-10 2009-02-26 Toyota Central R&D Labs Inc ガス検出装置
JP2011232059A (ja) * 2010-04-23 2011-11-17 Fis Inc 呼気成分測定装置
JP2015175835A (ja) * 2014-03-18 2015-10-05 フィガロ技研株式会社 ガス検出装置とガス検出方法
JP2021107829A (ja) * 2017-03-15 2021-07-29 株式会社タニタ 生体ガス検知装置、方法、及びプログラム

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4989567B2 (ja) * 2008-06-24 2012-08-01 株式会社豊田中央研究所 ガス検出装置
CH707875B1 (fr) * 2013-04-11 2017-10-31 Sunstar Suisse Sa Appareil et procédé pour l'analyse d'un mélange de gaz respiratoire notamment pour la détection de l'halitose.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01313750A (ja) * 1988-06-13 1989-12-19 Figaro Eng Inc ガス検出方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01313750A (ja) * 1988-06-13 1989-12-19 Figaro Eng Inc ガス検出方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002318215A (ja) * 2001-02-16 2002-10-31 Figaro Eng Inc ガス検出方法とその装置
JP2009042166A (ja) * 2007-08-10 2009-02-26 Toyota Central R&D Labs Inc ガス検出装置
JP2011232059A (ja) * 2010-04-23 2011-11-17 Fis Inc 呼気成分測定装置
JP2015175835A (ja) * 2014-03-18 2015-10-05 フィガロ技研株式会社 ガス検出装置とガス検出方法
JP2021107829A (ja) * 2017-03-15 2021-07-29 株式会社タニタ 生体ガス検知装置、方法、及びプログラム
JP7112134B2 (ja) 2017-03-15 2022-08-03 株式会社タニタ 生体ガス検知装置、方法、及びプログラム

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TW548092B (en) 2003-08-21
AU4142300A (en) 2000-11-10

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