WO2013061740A1 - 湿度検出装置 - Google Patents
湿度検出装置 Download PDFInfo
- Publication number
- WO2013061740A1 WO2013061740A1 PCT/JP2012/075595 JP2012075595W WO2013061740A1 WO 2013061740 A1 WO2013061740 A1 WO 2013061740A1 JP 2012075595 W JP2012075595 W JP 2012075595W WO 2013061740 A1 WO2013061740 A1 WO 2013061740A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- humidity
- humidity detection
- circuit board
- electronic circuit
- heating resistor
- Prior art date
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Classifications
-
- 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
- G01N27/121—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 for determining moisture content, e.g. humidity, of the fluid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/10393—Sensors for intake systems for characterising a multi-component mixture, e.g. for the composition such as humidity, density or viscosity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0418—Air humidity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
Definitions
- the present invention relates to a detection device, and more particularly to a detection device suitable for measuring the temperature and humidity of intake air of an internal combustion engine.
- a polymer electric capacity type humidity sensor in which a sensor element made of a polymer is formed on a substrate and the humidity of the atmosphere is measured from a change in the capacitance value of the element. Since this humidity sensor can detect even low humidity, has relatively high accuracy, and is low in cost, it is widely used as a detection sensor for atmospheric humidity from consumer to industrial measuring instruments.
- Patent Document 1 shows an example in which a humidity measuring device and a pressure measuring device are integrated.
- Patent Document 2 shows an example of a humidity sensor provided with a heating unit for the purpose of suppressing condensation of the humidity sensor.
- Humidity detection devices have recently been used for fuel control applications, and have been used mainly for air conditioning management in vehicle interiors. There is no demand for durability in a harsh environment for use in the passenger compartment. However, when used for fuel control applications, for example, when integrated with an intake air flow rate measuring device or other sensor installed in an internal combustion engine, environmental resistance equivalent to the intake air flow rate measuring device is obtained. Required.
- Humidity detection devices are affected by fouling and water droplets adhering to the humidity detection element, and the environment in which they occur in combination. Measurement accuracy deteriorates, and clear technical countermeasures are essential. It becomes.
- Patent Document 2 When used under severe environmental conditions such as an internal combustion engine, for example, in the prior art disclosed in Patent Document 2, it is not considered to suppress fouling substances such as carbon even if dew condensation can be suppressed. Further, as pointed out by Patent Document 2, there is a problem that the environment around the humidity detecting element changes rapidly and the humidity detecting element is condensed when the dew point is reached.
- the pollutant floating in the atmosphere including carbon mentioned above adheres to the vicinity of the humidity detecting element, the pollutant itself has a hygroscopic property, so that condensation occurs in combination and high humidity air is generated.
- the pollutant absorbs moisture, and the time until the moisture is dried also causes a problem in measurement accuracy that the humidity higher than the actual environment is continuously detected.
- An object of the present invention is to provide a humidity detection device with high measurement accuracy even under severe environmental conditions.
- a humidity detection device of the present invention has a humidity detection element mounted on an electronic circuit board, and a plurality of humidity detection elements on the same surface as the surface on which the humidity detection element is mounted on the electronic circuit board. A heating resistor was mounted.
- a humidity detecting element 2 is mounted on the electronic circuit board 1, and the electronic circuit board 1 further includes an input / output terminal 4 for performing input / output with the outside. Humidity detection using these is achieved by mounting the entire humidity detection element 2 and a part of the electronic circuit board 1 on the intake air conduit so as to directly touch the air flowing through the intake air conduit.
- a heating resistor 3 is mounted on the electronic circuit board 1 on the same surface as the surface on which the humidity detection element 2 is mounted and around the humidity detection element 2, and not the entire electronic circuit board 1, Only the humidity detecting element 2 portion is locally heated so that a heating area 5 is formed on the surface of the electronic circuit board 1.
- the temperature difference becomes the largest near the boundary of the heating zone 5.
- the fouling substance can be intentionally adhered to the outer peripheral portion of the heating zone 5 by utilizing the characteristic that the fouling substance floating in the air moves toward the low temperature side in this temperature difference.
- the pollutant in the air uniformly adheres to the substrate, and the pollutant adheres to the humidity detection element 2 itself.
- the pollutant absorbs moisture, causing a humidity measurement error.
- the heating resistor 3 is mounted around the humidity detection element 2 around the humidity detection element 2 as in this configuration, the humidity detection element 2 can be used even in a flow field in which the air flow direction is randomly generated. Therefore, the temperature distribution has symmetry, so that the performance can be maintained without being affected by the air flow.
- the humidity detecting device of this embodiment is provided with one heating resistor 3 upstream and downstream of the air flow with respect to the humidity detecting element 2 unlike the previous embodiment. It has become the composition. That is, when the flow of air flowing around the humidity detection element 2 can be uniaxially made possible by the configuration of the present apparatus, the mounting method, etc., the upstream and downstream of the air flow with respect to the humidity detection element 2
- the heating resistor 3 is mounted on each. Thereby, the mounting quantity of the heating resistor 3 can be reduced, the power consumption can be further reduced, and the entire apparatus can be reduced in size and weight. Further, since the area of the portion that comes into contact with the intake air can be reduced, it is possible to reduce the air resistance due to the mounting of the present apparatus.
- the relationship between the mounting positions of the humidity detecting element 2 and the heating resistor 3 is defined with respect to the configuration shown in FIG. That is, when the distance between the humidity detection element 2 and the heating resistor 3 is L, and the length of the short side of the heating resistor 3 is W, the humidity detection element 2 and the heating resistor 3 are set so that L ⁇ 4W. Implemented. It is advantageous for the heating area 5 to be as far away from the humidity detection element 2 as possible against measurement errors due to fouling and absorption of fouling substances.
- the distance L between the humidity detection element 2 and the heating resistor 3 is 3 W, and the amount of heat generated by the heating resistor 3 is also taken into account, the distance between the humidity detection element 2 and the heating resistor 3 is about 4 W at the maximum. It can be set as the humidity detection apparatus which can achieve the original purpose of a pollutant.
- the other surface of the electronic circuit board 1 on the other surface opposite to the surface on which the humidity detection element 2 and the heating resistor 3 are mounted is another electronic device constituting the humidity detection device. Part 7 was mounted.
- the input / output terminal 4 is also mounted on the same surface as the surface on which the other electronic components 7 are mounted.
- the intake pipe constituting member 9 constituting the main passage 8 is provided with a mounting hole 11 for the humidity sensor 10 in a part thereof, and is attached via a seal member 12 such as an O-ring.
- the humidity sensor 10 is based on a housing member 15 in which a connector 13 and a connector terminal 14 are integrally molded, and includes an electronic circuit board 1 on which a humidity detection element 2, a heating resistor 3, and other electronic components 7 are mounted.
- the coating member 16 such as is injected from the side on which the other electronic component 7 is mounted.
- the electrical connection between the connector terminal 14 and the electronic circuit board 1 is performed by a metal wire 17, and input / output with the outside is enabled via the connector 13.
- the housing member 15 is provided with a sub-passage 18 for taking in part of the intake air flowing through the main passage 8, and the humidity detecting element 2 and the heating resistor 3 are in direct contact with the air flowing through the sub-passage 18. Since the measurement can be performed and the air flow direction 6 is limited to one axis by the auxiliary passage 18, the heating resistor 3 that needs to be mounted is limited to the upstream and downstream of the humidity detecting element 2.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
電子回路基板1上に湿度検出素子2が実装され、更に、電子回路基板1は外部との入出力を行うための入出力端子4を備える。これらを用いた湿度検出は、湿度検出素子2の全体と電子回路基板1の一部を、吸入空気管路を流れる空気に直接触れるように吸入空気管路に装着することで達成する。
2 湿度検出素子
3 加熱抵抗体
4 入出力端子
5 加熱域
6 空気の流れ方向
7 その他電子部品
8 主通路
9 吸気管路構成部材
10 湿度センサ
11 装着穴
12 シール部材
13 コネクタ
14 コネクタ端子
15 ハウジング部材
16 コーティング部材
17 金属ワイヤ
18 副通路
Claims (5)
- 電子回路基板と、前記電子回路基板の一方の面に実装された湿度検出素子とを有し、前記湿度検出素子の全体と前記電子回路基板の一部を空気に晒して空気中の湿度を検出する湿度検出装置において、
前記湿度検出素子が実装されている面と同一面に複数の加熱抵抗体が実装され、
前記加熱抵抗体は、前記湿度検出素子の周囲に設けられていることを特徴とする湿度検出装置。 - 請求項1に記載の湿度検出装置において、
前記複数の加熱抵抗体は、前記湿度検出素子に対して空気の流れの上流及び下流側にそれぞれ少なくとも一つ設けられていることを特徴とする湿度検出装置。 - 請求項2に記載の湿度検出装置において、
前記湿度検出素子と前記加熱抵抗体との距離をL、前記加熱抵抗体の幅をWとすると、 L<4Wの関係となるように前記湿度検出素子および前記加熱抵抗体を配置したことを特徴とする湿度検出装置。 - 請求項1に記載の温度検出装置において、
前記湿度検出素子および前記加熱抵抗体が実装された面とは相反するもう他方の面に、その他の電子部品が実装されていることを特徴とする湿度検出装置。 - 請求項4に記載の湿度検出装置において、
前記その他の電子部品が実装される側の電子回路基板の表面がコーティング部材で覆われていることを特徴とする湿度検出装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280052759.3A CN103890574A (zh) | 2011-10-28 | 2012-10-03 | 湿度检测装置 |
US14/353,581 US20140283596A1 (en) | 2011-10-28 | 2012-10-03 | Humidity Detection Device |
DE112012004663.3T DE112012004663T8 (de) | 2011-10-28 | 2012-10-03 | Feuchtigkeitserfassungsvorrichtung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011236608A JP5913906B2 (ja) | 2011-10-28 | 2011-10-28 | 湿度検出装置 |
JP2011-236608 | 2011-10-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013061740A1 true WO2013061740A1 (ja) | 2013-05-02 |
Family
ID=48167575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/075595 WO2013061740A1 (ja) | 2011-10-28 | 2012-10-03 | 湿度検出装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20140283596A1 (ja) |
JP (1) | JP5913906B2 (ja) |
CN (1) | CN103890574A (ja) |
DE (1) | DE112012004663T8 (ja) |
WO (1) | WO2013061740A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3081929A4 (en) * | 2013-12-10 | 2017-07-12 | Hitachi Automotive Systems, Ltd. | Humidity measurement device |
DE102021212582A1 (de) | 2021-11-09 | 2023-05-11 | Robert Bosch Gesellschaft mit beschränkter Haftung | Sensoranordnung, Brennstoffzellensystem mit einer Sensoranordnung und Verfahren zum Herstellen einer Sensoranordnung |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013064367A (ja) * | 2011-09-20 | 2013-04-11 | Hitachi Automotive Systems Ltd | 空気物理量検出装置 |
US20190219529A1 (en) * | 2016-05-23 | 2019-07-18 | Hitachi Automotive Systems, Ltd. | Humidity Measuring Apparatus |
JP6919176B2 (ja) * | 2016-10-28 | 2021-08-18 | 株式会社デンソー | 空気物理量センサ |
WO2018193743A1 (ja) * | 2017-04-21 | 2018-10-25 | 日立オートモティブシステムズ株式会社 | 湿度測定装置 |
TWM569412U (zh) * | 2018-08-07 | 2018-11-01 | 捷騰光電股份有限公司 | 溫濕度感測模組之烘乾裝置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01301158A (ja) * | 1988-05-30 | 1989-12-05 | Toshiba Corp | ガスセンサ |
JPH0560716A (ja) * | 1991-09-04 | 1993-03-12 | Glory Ltd | 湿度センサ |
JP2004093475A (ja) * | 2002-09-03 | 2004-03-25 | Ngk Spark Plug Co Ltd | シリコン製マイクロセンサ |
JP2009168649A (ja) * | 2008-01-17 | 2009-07-30 | Ishizuka Electronics Corp | 傍熱型感温抵抗素子、及び傍熱型感温抵抗素子を用いた絶対湿度センサ |
WO2010113712A1 (ja) * | 2009-03-31 | 2010-10-07 | アルプス電気株式会社 | 容量型湿度センサ及びその製造方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4143177A (en) * | 1977-01-31 | 1979-03-06 | Panametrics, Inc. | Absolute humidity sensors and methods of manufacturing humidity sensors |
US5175023A (en) * | 1986-04-28 | 1992-12-29 | Nippondenso Co., Ltd. | Method for forming insulating coating material for electronic circuit board |
JPH02138858A (ja) * | 1988-03-01 | 1990-05-28 | Ricoh Co Ltd | ガス検出装置 |
NO315017B1 (no) * | 2000-06-09 | 2003-06-23 | Idex Asa | Sensorbrikke, s¶rlig for måling av strukturer i en fingeroverflate |
JP4976469B2 (ja) * | 2009-08-28 | 2012-07-18 | 日立オートモティブシステムズ株式会社 | 熱式湿度センサ |
-
2011
- 2011-10-28 JP JP2011236608A patent/JP5913906B2/ja not_active Expired - Fee Related
-
2012
- 2012-10-03 WO PCT/JP2012/075595 patent/WO2013061740A1/ja active Application Filing
- 2012-10-03 CN CN201280052759.3A patent/CN103890574A/zh active Pending
- 2012-10-03 DE DE112012004663.3T patent/DE112012004663T8/de active Active
- 2012-10-03 US US14/353,581 patent/US20140283596A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01301158A (ja) * | 1988-05-30 | 1989-12-05 | Toshiba Corp | ガスセンサ |
JPH0560716A (ja) * | 1991-09-04 | 1993-03-12 | Glory Ltd | 湿度センサ |
JP2004093475A (ja) * | 2002-09-03 | 2004-03-25 | Ngk Spark Plug Co Ltd | シリコン製マイクロセンサ |
JP2009168649A (ja) * | 2008-01-17 | 2009-07-30 | Ishizuka Electronics Corp | 傍熱型感温抵抗素子、及び傍熱型感温抵抗素子を用いた絶対湿度センサ |
WO2010113712A1 (ja) * | 2009-03-31 | 2010-10-07 | アルプス電気株式会社 | 容量型湿度センサ及びその製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3081929A4 (en) * | 2013-12-10 | 2017-07-12 | Hitachi Automotive Systems, Ltd. | Humidity measurement device |
US9970396B2 (en) | 2013-12-10 | 2018-05-15 | Hitachi Automotive Systems, Ltd. | Intake air humidity measurement device for an internal combustion engine |
DE102021212582A1 (de) | 2021-11-09 | 2023-05-11 | Robert Bosch Gesellschaft mit beschränkter Haftung | Sensoranordnung, Brennstoffzellensystem mit einer Sensoranordnung und Verfahren zum Herstellen einer Sensoranordnung |
Also Published As
Publication number | Publication date |
---|---|
DE112012004663T5 (de) | 2014-09-04 |
CN103890574A (zh) | 2014-06-25 |
JP2013096708A (ja) | 2013-05-20 |
JP5913906B2 (ja) | 2016-04-27 |
DE112012004663T8 (de) | 2014-11-13 |
US20140283596A1 (en) | 2014-09-25 |
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