JPH10153567A - Gas detector - Google Patents

Gas detector

Info

Publication number
JPH10153567A
JPH10153567A JP31355696A JP31355696A JPH10153567A JP H10153567 A JPH10153567 A JP H10153567A JP 31355696 A JP31355696 A JP 31355696A JP 31355696 A JP31355696 A JP 31355696A JP H10153567 A JPH10153567 A JP H10153567A
Authority
JP
Japan
Prior art keywords
gas
cover
air
heater coil
windbreaking
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
JP31355696A
Other languages
Japanese (ja)
Inventor
Kiyoshi Abe
清 阿部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP31355696A priority Critical patent/JPH10153567A/en
Publication of JPH10153567A publication Critical patent/JPH10153567A/en
Withdrawn legal-status Critical Current

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  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

PROBLEM TO BE SOLVED: To enhance the detection accuracy, by covering a sensor part to gas made up of a gas sensing body and a heater coil with a windbreaking cover combining gas permeability and windbreaking property. SOLUTION: The whole of a gas sensing body 3 and a heater coil 4 is covered with a windbreaking cover 10. The cover 10 is so arranged to combine gas permeability and windbreaking property and a number of pores 11 are bored in a top surface 12 and on the entire circumference of a side above an explosion proof screen 1. The cover 10 spread over the perimeter of the gas sensing body 3 and the heater coil 4 shields the whole of the gas sensing body 3 and the heater coil 4 from outside. As a result, even when air polluted inside and outside a car room has a flow velocity, an air current hits the windbreaking cover 10 to be infiltrated into a sensor part within the cover 10 from the pores 11 and the gas sensing body 3 senses the polluted air to obtain an output of a gas sensor. This keeps changes in heat radiation from affecting the sensor part and enables quick replacement of the polluted air, thereby achieving a detection with higher certainty.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、空気の汚れを検知
するガス検知装置、特に車両用空調装置など気流のある
場所にも適用されるガス検知装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas detection device for detecting contamination of air, and more particularly to a gas detection device applicable to a place having an airflow, such as a vehicle air conditioner.

【0002】[0002]

【従来の技術】図3および図4は空気の汚れを検知し、
特に車両用空調装置など気流のある場所にも使用されて
いる従来のガスセンサの説明図である。図において、車
両用空調装置には車内の環境を清浄に保つために車室内
に空気の汚れを検知するガスセンサが設けられており、
このガスセンサによりダンパを内外に切り換えたり空気
清浄器を作動させたりしている。このガスセンサは基台
7の上面にベース5を設け、ベース5に3対のニッケル
ピン6が突設され、2対のニッケルピン6の間には感ガ
ス体3が電極リード線を介して設けられ、また1対のニ
ッケルピン6の間には感ガス体3の中を通るヒータコイ
ル4が設けられている。感ガス体3とヒータコイル4と
の周囲は防爆金網1で覆われており、防爆金網1の開口
部からガスが入り込むように形成されている。感ガス体
3は直流回路に組み込まれており、ヒータ4へ通電する
ことにより感ガス体3が約350℃に加熱されるように
なっており、この状態で感ガス体3にガスが接触すると
化学反応が生じて感ガス体3の電気抵抗が小さくなり、
この抵抗の変化を分圧して電圧の変化を取り出すことに
より空気の汚染度を検出するようになっている。
2. Description of the Related Art FIGS. 3 and 4 detect air contamination.
In particular, it is an explanatory view of a conventional gas sensor used also in a place having an airflow such as a vehicle air conditioner. In the drawing, the vehicle air conditioner is provided with a gas sensor for detecting air contamination in the vehicle compartment in order to keep the interior of the vehicle clean.
The gas sensor switches the damper between inside and outside and operates the air purifier. In this gas sensor, a base 5 is provided on an upper surface of a base 7, three pairs of nickel pins 6 are protruded from the base 5, and a gas-sensitive body 3 is provided between two pairs of nickel pins 6 via an electrode lead wire. A heater coil 4 is provided between the nickel pins 6 so as to pass through the gas-sensitive body 3. The periphery of the gas-sensitive body 3 and the heater coil 4 is covered with an explosion-proof wire mesh 1, and is formed so that gas enters from an opening of the explosion-proof wire mesh 1. The gas-sensitive body 3 is incorporated in a DC circuit, and is heated to about 350 ° C. by energizing the heater 4. When the gas comes into contact with the gas-sensitive body 3 in this state, A chemical reaction occurs and the electrical resistance of the gas-sensitive body 3 decreases,
The degree of air pollution is detected by dividing the change in resistance and extracting the change in voltage.

【0003】なお、実開平6−62360号公報には通
気性と防風性を兼備した防風カバーを被せたCOセンサ
が開示されている。また、特開平2−171507号公
報には換気扇や自然風などにより外気が通気孔から逆流
入しても温度センサが外気の影響を受けないようにセン
サ取付け板に小孔を開け、センサ部をカバーで覆った温
度センサが開示されている。
[0003] Japanese Utility Model Laid-Open No. 6-62360 discloses a CO sensor covered with a windproof cover having both air permeability and windproofness. Japanese Patent Application Laid-Open No. 2-171507 discloses that a small hole is formed in a sensor mounting plate so that a temperature sensor is not affected by outside air even if outside air flows backward from a ventilation hole due to a ventilation fan, natural wind, or the like, and a sensor portion is formed. A covered temperature sensor is disclosed.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上記の
ような従来のガスセンサにおいては感ガス体3を防爆金
網1で囲んでいるだけであるため、車両用空調装置など
に設置した場合は車速による気流、エアコンによる気流
の影響を受ける場所では気流で感ガス体3およびヒータ
コイル4が冷やされ、流速によって感ガス体3に抵抗の
変化が生じてガスセンサの出力が変動するなどの問題が
ある。
However, in the above-described conventional gas sensor, the gas-sensitive body 3 is merely surrounded by the explosion-proof wire net 1, so that when the gas sensor 3 is installed in an air conditioner for a vehicle or the like, the airflow depends on the vehicle speed. However, in a place affected by the airflow from the air conditioner, there is a problem that the gas-sensitive body 3 and the heater coil 4 are cooled by the airflow, the resistance of the gas-sensitive body 3 changes due to the flow velocity, and the output of the gas sensor fluctuates.

【0005】また、実開平6−62360号公報に記載
のCOセンサは風の影響を受けないでセンシングできる
ようにしてはいるが、グラスウールを使用しているため
肝心のセンサ応答性が非常に悪くなっている。また、特
開平2−171507号公報に記載の温度センサは加熱
調整器内の温度センサの検出精度を上げるようにしてお
り、小孔で処理する流体とセンサ部のカバーで影響を除
く流体とは全く別のもので、その二流体間には大きな温
度差がある。
The CO sensor described in Japanese Utility Model Laid-Open No. 6-62360 is capable of sensing without being affected by wind. However, since glass wool is used, the essential sensor response is very poor. Has become. The temperature sensor described in Japanese Patent Application Laid-Open No. 2-171507 is designed to improve the detection accuracy of the temperature sensor in the heating regulator. Quite differently, there is a large temperature difference between the two fluids.

【0006】[0006]

【課題を解決するための手段】本発明に係るガス検知装
置は上記課題の解決を目的にしており、感ガス体および
ヒータコイルによりガスを検知するセンサ部を具えたガ
ス検知装置における上記センサ部が検知するガスの気流
に対して通気性と防風性とを兼備した防風カバーにより
覆われている。
SUMMARY OF THE INVENTION An object of the present invention is to provide a gas detecting device, which comprises a sensor unit for detecting a gas by a gas sensing element and a heater coil. Is covered by a windproof cover that has both air permeability and windproofness for the gas flow detected by the airbag.

【0007】また、本発明に係るガス検知装置は、感ガ
ス体およびヒータコイルによりガスを検知するセンサ部
を具えたガス検知装置における上記センサ部が検知する
ガスの気流に対して通気性と防風性とを兼備した防風カ
バーにより覆われ、上記防風カバーの頂面には通気性を
具えず、該頂面を検知するガスの気流に向けて設置され
ている。
Further, the gas detection device according to the present invention is a gas detection device provided with a sensor portion for detecting a gas by a gas-sensitive body and a heater coil. The windproof cover is covered with a windproof cover having no air permeability, and is not provided with air permeability on the top surface of the windproof cover, and is installed so as to face the gas flow for detecting the top surface.

【0008】このように感ガス体とヒータコイルとによ
るガスのセンサ部をガスの通気性と防風性とを兼備した
防風カバーで覆うことにより検知するガスが通気性を有
する防風カバー内に入り込んで感ガス体がこのガスに感
応することにより空気の汚染度が検出されるが、このと
きガスの気流が防風性を有する防風カバーにより、また
通気性を設けていない頂面を気流に向けた防風性を有す
る防風カバーにより止められてガスセンサの出力に気流
の放熱による変動が生じない。
[0008] As described above, by covering the gas sensor portion formed by the gas sensing element and the heater coil with the windproof cover having both gas permeability and windproofness, the gas to be detected enters the windproof cover having gas permeability. The degree of air pollution is detected by the gas-sensitive body responding to this gas.At this time, the gas flow is controlled by a windproof cover with a windproof property, The output of the gas sensor is not fluctuated due to the heat radiation of the airflow because the windshield cover is stopped.

【0009】[0009]

【発明の実施の形態】図1および図2は本発明の実施の
一形態に係るガスセンサの説明図である。図において、
本実施の形態に係るガスセンサは空気の汚れを検知し、
特に車両用空調装置など気流のある場所にも使用される
ガスセンサで、図における符号1は防爆金網、3は感ガ
ス体、4はヒータコイル、5はベース、6はニッケルピ
ン、7は基台、10は防風カバー、11は小孔、12,
12a,12b,12cは頂面である。
1 and 2 are explanatory views of a gas sensor according to an embodiment of the present invention. In the figure,
The gas sensor according to the present embodiment detects air contamination,
In particular, reference numeral 1 in the figure denotes an explosion-proof wire mesh, 3 denotes a gas-sensitive body, 4 denotes a heater coil, 5 denotes a base, 6 denotes a nickel pin, and 7 denotes a base. , 10 is a windproof cover, 11 is a small hole, 12,
12a, 12b and 12c are top surfaces.

【0010】車両用空調装置には車内の環境を清浄に保
つために車室内に空気の汚れを検知するガスセンサが設
けられており、このガスセンサによりダンパを内外に切
り換えたり空気清浄器を作動させたりしている。図に示
すように本ガスセンサは基台7の上面にベース5を設
け、ベース5に3対のニッケルピン6が突設され、2対
のニッケルピン6の間には感ガス体3が電極リード線を
介して設けられ、また1対のニッケルピン6の間には感
ガス体3の中を通るヒータコイル4が設けられている。
感ガス体3とヒータコイル4との周囲は防爆金網1で覆
われており、防爆金網1の開口部からガスが入り込むよ
うに形成されている。感ガス体3は直流回路に組み込ま
れており、ヒータ4へ通電することにより感ガス体3が
約350℃に加熱されるようになっており、この状態で
感ガス体3にガスが接触すると化学反応が生じて感ガス
体3の電気抵抗が小さくなり、この抵抗の変化を分圧し
て電圧の変化を取り出すことにより空気の汚染度を検出
するようになっている。
A vehicle air conditioner is provided with a gas sensor for detecting air contamination in the vehicle compartment in order to keep the environment inside the vehicle clean. The gas sensor is used to switch a damper between inside and outside and to operate an air purifier. doing. As shown in the figure, the present gas sensor has a base 5 provided on the upper surface of a base 7, three pairs of nickel pins 6 are protruded from the base 5, and the gas-sensitive body 3 has electrode leads between the two pairs of nickel pins 6. A heater coil 4 is provided through a wire, and passes between the nickel pins 6 and passes through the gas-sensitive body 3.
The periphery of the gas-sensitive body 3 and the heater coil 4 is covered with an explosion-proof wire mesh 1, and is formed so that gas enters from an opening of the explosion-proof wire mesh 1. The gas-sensitive body 3 is incorporated in a DC circuit, and is heated to about 350 ° C. by energizing the heater 4. When the gas comes into contact with the gas-sensitive body 3 in this state, A chemical reaction occurs to reduce the electrical resistance of the gas-sensitive body 3, and the degree of air pollution is detected by dividing the change in resistance and extracting the change in voltage.

【0011】また、図1に示すように本ガスセンサにお
いては感ガス体3とヒータコイル4との全体が防風カバ
ー10により覆われている。この防風カバー10は通気
性と防風性とを兼備するように構成されており、小孔1
1が防爆金網1よりも上方の頂面12および側面全周に
多数開けられている。このような防風カバー10を感ガ
ス体3とヒータコイル4との周囲に被せたことにより、
感ガス体3とヒータコイル4との全体が防風カバー10
により完全に囲まれて外部と遮断されている。防風カバ
ー10下端の開口部は基台7に固定されている。防風カ
バー10は保護カバーとしての機能も果たす。なお、同
図(a)に示すように防風カバー10は気流に対して横
向きに設置してもよいが、同図(b)に示すように側面
にのみ小孔11を開け、頂面12aには小孔のないキャ
ップ状に形成して頂面12aを気流に向け設置してもよ
い。また、頂面12aは平面でもよいが、同図(c),
(d)に示すように気流に対する流体抵抗を削減するよ
うに頂面12b,12cを円錐状、或いは半球状に形成
してもよい。
Further, as shown in FIG. 1, in the present gas sensor, the entirety of the gas sensing element 3 and the heater coil 4 is covered by a windproof cover 10. The windproof cover 10 is configured to have both air permeability and windproofness.
A large number 1 is provided on the top surface 12 and the entire periphery of the side surface above the explosion-proof wire mesh 1. By covering such a windproof cover 10 around the gas-sensitive body 3 and the heater coil 4,
The whole of the gas sensing body 3 and the heater coil 4 is a windproof cover 10.
Is completely surrounded by and shielded from the outside. The opening at the lower end of the windproof cover 10 is fixed to the base 7. The windproof cover 10 also functions as a protective cover. Although the windbreak cover 10 may be installed laterally with respect to the airflow as shown in FIG. 1A, a small hole 11 is formed only on the side surface as shown in FIG. May be formed in a cap shape having no small hole, and the top surface 12a may be set to face the airflow. The top surface 12a may be flat, but as shown in FIG.
As shown in (d), the top surfaces 12b and 12c may be formed in a conical or hemispherical shape so as to reduce the fluid resistance to the air flow.

【0012】このように、感ガス体3とヒータコイル4
とが通気性と防風性とを兼備した防風カバー10で覆わ
れていることにより、またガスセンサ部よりも上方に位
置する側面にのみ小孔11を開けて頂面12aを無孔の
平面とし、この頂面12aを気流に対して垂直方向を向
くように配設したことにより、また頂面12b,12c
を平面に代えて円錐状の面、或いは半球状の面に形成し
たことにより、車室内外における汚れた空気が流速を有
する場合でも、この気流が防風カバー10に当たって流
れが止められた状態で防風カバー10に開けられている
小孔11の誘引作用および拡散で防風カバー10内のセ
ンサ部に入り込んで行く。そして、感ガス体3がこの汚
れた空気に感応することにより汚れた空気に対応する本
ガスセンサの出力が得られるが、流れが防風カバー10
により止められることによってセンサ部には気流による
放熱変動の影響が生じないのと同時に感ガス体3周囲の
汚れた空気の置換が早く行われ、車室内外における汚れ
た空気の確度の高い検出が行われる。
Thus, the gas sensing element 3 and the heater coil 4
Are covered with a windproof cover 10 having both air permeability and windproofness, and a small hole 11 is opened only on a side surface located above the gas sensor portion to make a top surface 12a a non-porous flat surface, By arranging the top surface 12a so as to be perpendicular to the air flow, the top surfaces 12b and 12c
Is formed on a conical surface or a hemispherical surface instead of a flat surface, so that even when dirty air inside and outside the vehicle compartment has a flow velocity, the airflow hits the windproof cover 10 and the windbreak is stopped. The small holes 11 formed in the cover 10 enter the sensor section in the windproof cover 10 by the attraction and diffusion. When the gas sensing element 3 responds to the dirty air, the output of the gas sensor corresponding to the dirty air is obtained.
As a result, the sensor unit is not affected by the heat radiation fluctuation due to the air flow, and at the same time, the replacement of the dirty air around the gas sensitive body 3 is performed quickly, and the detection of the dirty air inside and outside the vehicle compartment with high accuracy can be performed. Done.

【0013】図2は本ガスセンサを用いて従来例の場合
と同一の条件で風速に対する本ガスセンサの出力特性を
求めたグラフである。従来例の場合のグラフと比較して
本ガスセンサでは防風カバー10の防風効果によって気
流による影響が殆どなくなり、図に示すように良好な出
力特性が得られた。また、流れが防風カバー10によっ
て止められることにより気流による感ガス体3、ヒータ
コイル4の放熱冷却による本ガスセンサの出力変動が効
果的に防止される。また、小孔11により感ガス体3周
囲の汚れた空気の置換が早く行われて車室内における汚
れた空気の確度の高い検出が可能になる。
FIG. 2 is a graph showing the output characteristics of the present gas sensor with respect to the wind speed using the present gas sensor under the same conditions as in the conventional example. Compared to the graph in the case of the conventional example, the gas sensor hardly affected the airflow due to the windproof effect of the windproof cover 10, and a good output characteristic was obtained as shown in the figure. In addition, since the flow is stopped by the windproof cover 10, the output fluctuation of the gas sensor due to the radiation of the gas-sensitive body 3 and the heater coil 4 due to the airflow is effectively prevented. In addition, the small holes 11 promptly replace dirty air around the gas-sensitive body 3, thereby enabling highly accurate detection of dirty air in the vehicle interior.

【0014】従来のガスセンサにおいては感ガス体を防
爆金網で囲んでいるだけであるため、車両用空調装置な
どに設置した場合は車速による気流、エアコンによる気
流の影響を受ける場所では気流で感ガス体およびヒータ
コイルが冷やされ、流速によって感ガス体に抵抗の変化
が生じてガスセンサの出力が変動するなどの問題がある
が、本ガスセンサにおいては基台7上の感ガス体3とヒ
ータコイル4との周囲にセンサ部よりも上方に小孔11
を設けるか、または頂面12を無孔としてセンサ部より
も上方の側面にのみ小孔11を設けた通気性と防風性と
を兼備した防風カバー10を被せており、感ガス体3お
よびヒータコイル4の全体を防風カバー10により完全
に覆うことにより、汚れた空気が防風カバー10内に入
り込む過程で汚れた空気を流速が略零の状態に減速する
ことができて気流による感ガス体3とヒータコイル4と
の放熱による本ガスセンサの出力の変動を防止すること
ができるようになり、車室内外における空気の汚染度検
出の精度と信頼性とを格段に高めることができる。
In the conventional gas sensor, the gas-sensitive body is merely surrounded by an explosion-proof wire net. Therefore, when the gas sensor is installed in an air conditioner for a vehicle or the like, the gas flow is affected by the vehicle speed and the airflow by the air conditioner in a place affected by the air flow. There is a problem that the body and the heater coil are cooled, the resistance of the gas-sensitive body changes due to the flow velocity, and the output of the gas sensor fluctuates. However, in the present gas sensor, the gas-sensitive body 3 on the base 7 and the heater coil 4 And a small hole 11 above the sensor section
Or a windproof cover 10 having both air permeability and windproofness with a small hole 11 provided only on the side surface above the sensor portion with the top surface 12 being non-porous. By completely covering the entire coil 4 with the windproof cover 10, the flow of the dirty air can be reduced to a substantially zero state in the process of the dirty air entering the windproof cover 10, and the gas-sensitive body 3 due to the airflow can be reduced. It is possible to prevent the output of the gas sensor from fluctuating due to heat radiation between the gas sensor and the heater coil 4, thereby significantly improving the accuracy and reliability of detecting the degree of contamination of air inside and outside the vehicle cabin.

【0015】[0015]

【発明の効果】本発明に係るガス検知装置は前記のよう
に構成されており、検知するガスが通気性を有する防風
カバー内に入り込んで感ガス体がこのガスに感応するこ
とにより空気の汚染度が検出されるが、このときガスの
気流が防風性を有する防風カバーにより止められてガス
センサの出力に気流の放熱による変動が生じないので、
空気の汚染度を検出する精度が向上する。
The gas detecting device according to the present invention is constructed as described above, and the gas to be detected enters the windproof cover having air permeability, and the gas-sensitive body responds to the gas, thereby contaminating the air. However, at this time, the gas flow is stopped by the windproof cover having the windproof property, and the output of the gas sensor does not fluctuate due to the heat radiation of the gas flow.
The accuracy of detecting the degree of air pollution is improved.

【図面の簡単な説明】[Brief description of the drawings]

【図1】図1(a)は本発明の実施の一形態に係るガス
センサの断面図、同図(b),(c),(d)はそれぞ
れその応用例に係るガスセンサの防風カバーの断面図で
ある。
FIG. 1A is a cross-sectional view of a gas sensor according to an embodiment of the present invention, and FIGS. 1B, 1C, and 1D are cross-sectional views of a windproof cover of a gas sensor according to an application example thereof. FIG.

【図2】図2はその作用説明図である。FIG. 2 is an explanatory diagram of the operation.

【図3】図3(a)は従来のガスセンサの斜視図、同図
(b)は断面図、同図(c)はその回路図である。
3A is a perspective view of a conventional gas sensor, FIG. 3B is a sectional view, and FIG. 3C is a circuit diagram thereof.

【図4】図4は、その作用説明図である。FIG. 4 is an explanatory diagram of the operation.

【符号の説明】[Explanation of symbols]

1 防爆金網 3 感ガス体 4 ヒータコイル 5 ベース 6 ニッケルピン 7 基台 10 防風カバー 11 小孔 12 頂面 12a 頂面 12b 頂面 12c 頂面 DESCRIPTION OF SYMBOLS 1 Explosion-proof wire mesh 3 Gas-sensitive body 4 Heater coil 5 Base 6 Nickel pin 7 Base 10 Windproof cover 11 Small hole 12 Top surface 12a Top surface 12b Top surface 12c Top surface

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 感ガス体およびヒータコイルによりガス
を検知するセンサ部を具えたガス検知装置において、検
知するガスの気流に対して通気性と防風性とを兼備した
防風カバーにより上記センサ部を覆ったことを特徴とす
るガス検知装置。
1. A gas detection device comprising a sensor unit for detecting a gas by a gas sensing body and a heater coil, wherein the sensor unit is provided by a windproof cover having both air permeability and windproofness with respect to the gas flow of the detected gas. A gas detection device characterized by being covered.
【請求項2】 上記防風カバーの頂面には通気性を具え
ず、該頂面を検知するガスの気流に向けて設置したこと
を特徴とする請求項1に記載のガス検知装置。
2. The gas detection device according to claim 1, wherein the windproof cover has no air permeability on a top surface thereof, and is installed so as to face a gas flow for detecting the top surface.
JP31355696A 1996-11-25 1996-11-25 Gas detector Withdrawn JPH10153567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31355696A JPH10153567A (en) 1996-11-25 1996-11-25 Gas detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31355696A JPH10153567A (en) 1996-11-25 1996-11-25 Gas detector

Publications (1)

Publication Number Publication Date
JPH10153567A true JPH10153567A (en) 1998-06-09

Family

ID=18042744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31355696A Withdrawn JPH10153567A (en) 1996-11-25 1996-11-25 Gas detector

Country Status (1)

Country Link
JP (1) JPH10153567A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007309908A (en) * 2006-05-22 2007-11-29 Nissan Motor Co Ltd Hydrogen sensor
CN106680171A (en) * 2017-03-07 2017-05-17 济南诺方电子技术有限公司 Rainproof cover of dust sensor
CN106769744A (en) * 2017-03-07 2017-05-31 济南诺方电子技术有限公司 A kind of vehicle-mounted laser dust sensor
JPWO2021144907A1 (en) * 2020-01-16 2021-07-22

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007309908A (en) * 2006-05-22 2007-11-29 Nissan Motor Co Ltd Hydrogen sensor
CN106680171A (en) * 2017-03-07 2017-05-17 济南诺方电子技术有限公司 Rainproof cover of dust sensor
CN106769744A (en) * 2017-03-07 2017-05-31 济南诺方电子技术有限公司 A kind of vehicle-mounted laser dust sensor
JPWO2021144907A1 (en) * 2020-01-16 2021-07-22

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