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11. 发明专利

JPH0224549A GAS SENSOR 失效
公开(公告)号：JPH0224549A
公开(公告)日：1990-01-26
申请号：JP17369488
申请日：1988-07-14
申请人： YAZAKI CORP
发明人： SUZUKI TAKAYUKI , YASUGATA KAZUTOSHI
IPC分类号： G01N27/12
摘要： PURPOSE:To obtain a gas sensor having high sensitivity and responding rapidly irrespective of the direction of a change in the air fuel ratio, by using a perovskite type composite oxide having Sr, Y and SnO. CONSTITUTION:Strontium carbonate as a material containing strontium, an yttrium oxide as a material containing yttrium, and a tin oxide as a material containing in, which is obtained by dissolving metal tin in a nitric acid and by heating a tin nitrate solution thus obtained, are dried to the full respectively and then measured stoichiometrically, and the mixture of these materials are crushed together by using a vibration mill. Subsequently, a crushed substance thus obtained is formed into a tablet, put in an electric furnace and baked for 20 hours at a temperature of 1,200 deg.C, and thereby a sintered body of a composite oxide is obtained. The sintered body thus obtained is made into fine powder; the powder is put in a mold and pressed, so as to prepare a molded body. Next, this molded body is baked and thereby a sensor element is obtained. The element is made up of an oxide having Sr(1-x)Y3x SnO(3-d), where 0

12. 发明专利

JPS6378059A INCOMPLETE COMBUSTION DETECTING SENSOR 失效
公开(公告)号：JPS6378059A
公开(公告)日：1988-04-08
申请号：JP22272786
申请日：1986-09-20
申请人： YAZAKI CORP
发明人： YASUGATA KAZUTOSHI , OGASAWARA KYUICHI , NITA HOZUMI
IPC分类号： G01N27/00 , G01N27/12
摘要： PURPOSE:To permit detection of incomplete combustion in a wide temp. range by combining a detecting element for which an n type perovskite type oxide semiconductor material expressed by the specific formula is used and a p type perovskite type oxide semiconductor for temp. compensation expressed by the specific formula. CONSTITUTION:This combustion detecting sensor is constituted by holding the lead parts of the detecting element 1 formed by adding BaO at about 5-10% (weight) as a stabilizer to the n type perovskite type oxide semiconductor expressed by the formula I (where x is 0.1) and subjecting the material formed in such a manner to a platinum treatment and the thermistor 2 which is the p type perovskite type oxide semiconductor expressed by the formula II (where x is 0.05-0.1) and has the effect of temp. compensation and sensitization by an alumina insulator pipe 3. The incomplete combustion state and compete combustion state with a temp. change in the sensor part generated by the varying intensities of combustion, a difference in the incomplete combustion state, etc. are discriminatable if the sensor is constituted in the above-mentioned manner. The detection of the incomplete combustion state event at a low level of about 200ppm CO is possible.

13. 发明专利

JPH0933473A GAS DETECTION SENSOR 失效
公开(公告)号：JPH0933473A
公开(公告)日：1997-02-07
申请号：JP20785495
申请日：1995-07-21
申请人： GASTAR CORP , YAZAKI CORP
发明人： ENOMOTO MASANORI , YASUGATA KAZUTOSHI
IPC分类号： G01N27/16
摘要： PROBLEM TO BE SOLVED: To provide a CO sensor capable of detecting the concentration of CO in an exhaust gas and a change of a flow velocity of a main flow of the exhaust gas. SOLUTION: A CO detection mechanism part 3 including a comparison element 4, a detection element 5 and a temperature detection element 12 is formed on a sensor base 1. A wind velocity detection element 50 of a heat beam type is set next the CO detection mechanism part 3. The wind velocity detection element 50 and CO detection mechanism part 3 are separated by a heat-shielding wall 51. The CD detection mechanism part 3, wind velocity detection element 50 and heat-shielding wall 51 are covered with a metallic cover 35. At a front end of the cover 35, an entrance orifice hole 36 is formed at the side of an upstream of an exhaust gas and an exit orifice hole 37 is formed at the side of a downstream. The exhaust gas is decelerated at the orifice holes 36, 37, entering a deceleration introduction chamber 38 in the cover 35 while decreasing a flow velocity. The exhaust gas is dispersed at a dispersing chamber 41 finally to reach the CO detection mechanism part 3. It is judged with reference to a concentration of CO detected by the CO detection mechanism part 3 and a wind velocity value detected by the wind velocity detection element 50 whether an increase of the concentration of CO results from influences of a headwind blowing at an exit of the exhaust gas.

14. 发明专利

JPH095277A CO SENSOR 失效
公开(公告)号：JPH095277A
公开(公告)日：1997-01-10
申请号：JP17941795
申请日：1995-06-22
申请人： GASTAR CORP , YAZAKI CORP
发明人： ENOMOTO MASANORI , KIMURA SHINGO , SHIGEOKA TAKUJI , YASUGATA KAZUTOSHI , OGINO KAORU , OISHI KAZUHIRO
IPC分类号： G01N27/16
摘要： PURPOSE: To provide a CO sensor which does not receive influence caused by flow velocity of exhaust gas. CONSTITUTION: A CO detection mechanism part 3 providing a comparative element 4 and a detection element is formed on the surface side of a sensor base 1, and covered by a cover 35. An inlet opening 36 and an outlet opening 37 are formed on the edge side of the cover 35, an inner space is made a deceleration introduction chamber 38, the base end of the cover 35 is a diffusion chamber 41, and the diffusion chamber 41 and the deceleration introduction chamber 38 are divided by a partition wall 40. A minute communicating hole 42 is formed in the partition wall 40. Exhaust gas is decelerated, introduced into the deceleration introduction chamber 38, furthermore decelerated at the time when it passes through the minute communicating hole 42, and introduced into the diffusion chamber 41 in a state in which flow velocity does not nearly exist. The exhaust gas of the almost zero flow velocity diffuses in the diffusion chamber 41, reaches the CO detection mechanism part 3, and the CO concentration in the exhaust gas is detected by the CO detection mechanism part 3 without receiving the influence of the flow velocity.

15. 发明专利

JPH0743333A CATALYTIC COMBUSTION TYPE GAS DETECTOR AND PRODUCTION THEREOF 失效
公开(公告)号：JPH0743333A
公开(公告)日：1995-02-14
申请号：JP19042393
申请日：1993-07-30
申请人： YAZAKI CORP
发明人： OGINO KAORU , NITA HOZUMI , YASUGATA KAZUTOSHI
IPC分类号： G01N27/16
摘要： PURPOSE:To provide a gas detector equipped with constitution capable of imparting desired characteristics. CONSTITUTION:A gas detector has a detection element 10 formed by providing a detection element 16 having a detection part 15 heated upon the contact with gas to be detected to be changed in its resistance value to one pedestal member 11, a comparison element 20 formed by providing a comparison element 26 having the comparison part 25 corresponding to the detection part 15 of the detection element 10 to other pedestal member 21 and a pedestal connecting means 30 connecting the other pedestal member 21 of the comparison element 20 and one pedestal member 11 of the detection element 10 to allow both elements 16, 26 to approach each other in opposed relationship and, at the time of connection, the detection element 10 and the comparison element 20 can be selectively connected.

16. 发明专利

JPH056866B2 失效
公开(公告)号：JPH056866B2
公开(公告)日：1993-01-27
申请号：JP22993686
申请日：1986-09-30
申请人： YAZAKI CORP
发明人： YASUGATA KAZUTOSHI , OGASAWARA KYUICHI , NITA HOZUMI
IPC分类号： G01N27/00 , G01N27/12

17. 发明专利

JPH03267752A THRESHOLD CURRENT TYPE OXYGEN CONCENTRATION DETECTOR 失效
公开(公告)号：JPH03267752A
公开(公告)日：1991-11-28
申请号：JP6751890
申请日：1990-03-17
申请人： TOYOTA CENTRAL RES & DEV , YAZAKI CORP
发明人： SAJI KEIICHI , KONDO HARUYOSHI , TAKAHASHI HIDEAKI , SUZUKI TAKAYUKI , YASUGATA KAZUTOSHI
IPC分类号： G01N27/41
摘要： PURPOSE:To maintain high accuracy over a long period of time by correcting the change in the threshold current in a waste combustion value with lapse of time in accordance with the change in the threshold current in the atm. air with lapse of time, detecting the on and off of a burner and switching means for impressing low- and high voltages. CONSTITUTION:The off signal outputted from the burner 1 is detected by a switching means 7 and the means 4 for impressing the high voltage is operated via a voltage switching section 7a. A means 5 for detecting current and an arithmetic section 6a for correction are then connected by a connection section 7b and a high-voltage side detection voltage V2 is impressed to the sensor 2. The threshold current value I2 in the atm. is detected by the means 5 in this way and is compared with the initial value I0 of the threshold current in the atm. preset in the arithmetic section 6a, by which the correction value C is calculated. This value is held in a holding section 6b. The switching section 7b is switched and a low-voltage side detection voltage V1 is impressed to the sensor 2 when the on signal of the burner 101 is outputted. The threshold current value I1 in the waste combustion gas is detected by the means 5 in this way and is inputted to a correction section 6c, by which the correction value C of the holding section 6b is read out and the current value I1 is corrected.

18. 发明专利

JPS6247541A P-P JUNCTION SEMICONDUCTOR OXYGEN SENSOR 失效
公开(公告)号：JPS6247541A
公开(公告)日：1987-03-02
申请号：JP18720085
申请日：1985-08-28
申请人： YAZAKI CORP
发明人： ARAI HIROMICHI , NITA HOZUMI , YASUGATA KAZUTOSHI
IPC分类号： G01N27/12
摘要： PURPOSE:To reduce the size of a titled sensor by connecting a perovskite type oxide semiconductor and Cr2O3 semiconductor oxide in series. CONSTITUTION:The perovskite type oxide semiconductor element 1 is prepd. in the following manner: SrCO3, TiO2 and Al2O3 are first weighed, mixed and ground in accordance with stoichiometrical compsn. and the powder mixture is calcined to obtain SrAlXTi1-XO3 (X=0.01). After the powder is thoroughly ground, the powder is molded under the pressure to form a pellet. The pellet is sintered to form the sintered body of the element 1. A Pt paste is baked on the pellet to form a Pt electrode 2. The Cr2O3 semiconductor oxide element 3 prepd. from a salt such as chromium chloride is molded under the pressure to form a pellet in the same manner as for the element 1, then the pellet is sintered to form the sintered body of the element 3. The Pt paste is baked onto the pellet to form a Pt electrode 4. The pellets of the elements 1, 3 are connected by using a Pt mesh 5 and Pt paste, by which the sensor is obtd. Since the construction is extremely simple as mentioned above, the reduction of the size is made possible.

19. 发明专利

JPH095282A CONTACT-BURING TYPE GAS SENSOR AND ITS MANUFACTURE 失效
公开(公告)号：JPH095282A
公开(公告)日：1997-01-10
申请号：JP15647895
申请日：1995-06-22
申请人： YAZAKI CORP , GASTAR CORP
发明人： OGINO KAORU , OISHI KAZUHIRO , YASUGATA KAZUTOSHI , ENOMOTO MASANORI , KIMURA SHINGO , SHIGEOKA TAKUJI
IPC分类号： G01N25/30 , G01N27/16
摘要： PURPOSE: To provide a contact-burning type gas sensor by which the concentration of a low-concentration combustible gas in a gas including incombustible gas elements such as carbon dioxide, etc., can be measured accurately. CONSTITUTION: A contact-burning type gas sensor is provided with a detection element and a comparison element, and the detection element is formed by arranging a γ-alumina depositing a catalyst around a metallic wire, while the comparison element is formed by arranging an α-alumina around the metallic wire. When assuming that the mass of the γ-alumina is the detection element is 100, that of the α-alumina in the comparison element is more than 70 and less than 130.

20. 发明专利

JPH095281A CONTACT COMBUSTION TYPE CO SENSOR 失效
公开(公告)号：JPH095281A
公开(公告)日：1997-01-10
申请号：JP17941695
申请日：1995-06-22
申请人： GASTAR CORP , YAZAKI CORP
发明人： ENOMOTO MASANORI , KIMURA SHINGO , SHIGEOKA TAKUJI , YASUGATA KAZUTOSHI , OGINO KAORU , TAKASHIMA HIROMASA , OISHI KAZUHIRO
IPC分类号： G01N27/16
摘要： PURPOSE: To maintain TCR characteristics of a platinum wire and contrive reinforcement of tension strength thereof in regard to a very fine resistance wire, which is the platinum wire, using for a comparative element and a detection element of a contact combustion type CO sensor. CONSTITUTION: At least a pair of first terminal pins and a pair of second terminal pins 2b are projected at the surface side of a sensor base 1. A very fine resistance wire of a detection element for detecting CO concentration by contact reaction is tensed between the first terminal pins. Similarly, another very fine resistance wire of a comparative element 4 is tensed between the terminal pins 2b. The comparative element 4 and the detection element is partitioned by a partition plate 6. The very fine resistance wire of the comparative element 4 and the detection element is constituted by the platinum wire containing zirconia or yttria of a very small amount in the range of 1.0%, or less, tension strength is heightened twice compared with a conventional platinum wire and TCR characteristics equal to a pure platinum wire is secured.

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