air flow meter

気流速度計

WordNet

1. a distinctive but intangible quality surrounding a person or thing; "an air of mystery"; "the house had a neglected air"; "an atmosphere of defeat pervaded the candidates headquarters"; "the place had an aura of romance" (同)aura, atmosphere
2. a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air"
3. once thought to be one of four elements composing the universe (Empedocles)
4. medium for radio and television broadcasting; "the program was on the air from 9 til midnight"; "the president used the airwaves to take his message to the people" (同)airwave
5. the region above the ground; "her hand stopped in mid air"; "he threw the ball into the air"
6. expose to warm or heated air, so as to dry; "Air linen"
7. broadcast over the airwaves, as in radio or television; "We cannot air this X-rated song" (同)send, broadcast, beam, transmit
8. be broadcast; "This show will air Saturdays at 2 P.M."
9. cause to flow; "The artist flowed the washes on the paper"
10. the amount of fluid that flows in a given time (同)flow_rate, rate of flow
11. any uninterrupted stream or discharge
12. cover or swamp with water
13. the act of flowing or streaming; continuous progression (同)stream
14. the motion characteristic of fluids (liquids or gases) (同)flowing
15. move or progress freely as if in a stream; "The crowd flowed out of the stadium" (同)flux
16. be abundantly present; "The champagne flowed at the wedding"
17. stamp with a meter indicating the postage; "meter the mail"
18. the basic unit of length adopted under the Systeme International dUnites (approximately 1.094 yards) (同)metre, m
19. rhythm as given by division into parts of equal duration (同)metre, time
20. any of various measuring instruments for measuring a quantity
21. (prosody) the accent in a metrical foot of verse (同)metre, measure, beat, cadence
22. measure with a meter; "meter the flow of water"
23. a short excursion (a walk or ride) in the open air; "he took the dogs for an airing"

PrepTutorEJDIC

1. 〈U〉『空気』,大気 / 《the ~》『空中』,空間,空(sky) / 《古》〈C〉そよ風,微風(breeze) / 《文》〈C〉(音楽の)ふし,旋律(melody) / 〈C〉様子,態度,風さい / 《複数形で》気どった様子 / 〈衣服など〉'を'空気にさらす,風にあてる / 〈部屋〉‘に'風を通す / 〈うわさ・意見など〉'を'言いふらす
2. 《副詞巳句始を伴って》〈気体・液体・電気などが〉『流れる』 / 《副詞[句]を伴って》〈言葉・人々などず〉流れるように続く / 〈心・場所などが〉(…で)いっぱいになる,満ちあふれる《+『with』+『名』》 / 《副詞[句]を伴って》〈髪・服などが〉長く垂れる;風になびく / 〈潮が〉満ちる / (…から)生じる,発生する《+『from』+『名』》 / 〈C〉《単数形で》(気体・液体・電気などの)『流れ』《+『of』+『名』》 / 〈C〉《単数形で》(言葉・人などの)絶え間のない(よどみのない)流れ《+『of』+『名』》 / 〈C〉《単数形で》(…の)洪水,はんらん《+『of』+『名』》 / 〈U〉《the flow》満ち潮,上げ潮
3. (ガス・水・電気などの)『計器』,メーター / (時間・速度・距離・強度などを測定,記録する)メーター,計器
4. 空気にあてること,虫干し / 《単数形で》外出,散歩 / (知識・意見などの)公開,周知
5. 《文》(程度に応じて)〈賞・罰など〉‘を'割りあてる《+『out』+『名,』+『名』+『out』》

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/03/10 03:39:19」(JST)

wiki en

[Wiki en表示]

Conducting air flow measurements at radionuclide station RN76,Salchalet, USA

An air flow meter, is a device that measures air flow, i.e. how much air is flowing through a tube. It does not measure the volume of the air passing through the tube, it measures the mass of air flowing through the device per unit time. Thus air flow meters are simply an application of mass flow meters for a special medium. Typically, mass air flow measurements are expressed in the units of kilograms per second (kg/s).

In automobiles

An air flow meter is used in some automobiles to measure the quantity of air going into the internal combustion engine. All modern electronically controlled diesel engines use an air flow meter, as it is the only possible means of determining the air intake for them. In the case of a petrol engine, the electronic control unit (ECU) then calculates how much fuel is needed to inject into the cylinder ports. In the diesel engine, the ECU meters the fuel through the injectors into the engines cylinders during the compression stroke.

The vane (flap) type air flow meters (Bosch L-Jetronic and early Motronic EFI systems or Hitachi) actually measure air volume, whereas the later "hot wire" and "hot film" air mass meters measure the mass of air flow.

The flap type meter includes a spring which returns the internal flap to the initial position. Sometimes if the spring is tensioned too tightly, it can restrict the incoming air and it would cause the intake air speed to increase when not opened fully.

Differential pressure is also used for air flow measurement purposes.

Failures

Air flow meters may fail or wear out. When this happens, engine performance will often decrease significantly, engine emissions will be greatly increased, and usually the Malfunction Indicator Lamp (MIL) will illuminate. In most countries in Europe, and in places in the United States where emissions inspections are obligatory, a lit MIL is cause for a vehicle to fail the inspection. Some engines do not idle with an air flow meter failure.

Air flow meter for R&D of cars

In the development process of internal combustion engines with engine test stands, an air flow meter/air flow measuring unit is used for measuring the continuous gravimetric air consumption of combustion engines.

Industrial environments

Air flow meters monitor air (compressed, forced, or ambient) in many manufacturing processes. In many industries, preheated air (called "combustion air") is added to boiler fuel just before fuel ignition to ensure the proper ratio of fuel to air for an efficient flame. Pharmaceutical factories and coal pulverizers use forced air as a means to force particle movement or ensure a dry atmosphere. Air flow is also monitored in mining and nuclear environments to ensure the safety of people.

See also

• Anemometer
• List of sensors
• Mass flow sensor
• Category:Engines
• Category:Engine fuel system technology
• In-line flow meter
• Insertion flow meter
• Thermal mass flow meter

References

• Miata.net, Repair broken Air Flow Meter, by Zach Warner, 2 January, 2009
• Clarks garage, AFM shop manual, Air Flow Meter (AFM) Operation and Testing, 1998
• Auto shop 101, AFM sensor
• Spitzer, David W. (1990), Industrial Flow Measurement, ISBN 1-55617-243-5

UpToDate Contents

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• 4. 喘息における最大呼気流速度モニタリング peak expiratory flow rate monitoring in asthma
• 5. 神経筋疾患および胸壁疾患患者に対する連続的な非侵襲的換気補助 continuous noninvasive ventilatory support for patients with neuromuscular or chest wall disease

English Journal

• Uncertainty associated with the gravimetric measurement of particulate matter concentration in ambient air.

• Lacey RE1, Faulkner WB.
• Journal of the Air & Waste Management Association (1995).J Air Waste Manag Assoc.2015 Jul;65(7):887-94. doi: 10.1080/10962247.2015.1038397.
• This work applied a propagation of uncertainty method to typical total suspended particulate (TSP) sampling apparatus in order to estimate the overall measurement uncertainty. The objectives of this study were to estimate the uncertainty for three TSP samplers, develop an uncertainty budget, and det
• PMID 26079562

• CO and CO2 analysis in the diving gas of the fishermen of the Yucatan Peninsula.

• Chin W, Huchim O, Wegrzyn GH, Sprau SE, Salas S, Markovitz GH.
• Undersea & hyperbaric medicine : journal of the Undersea and Hyperbaric Medical Society, Inc.Undersea Hyperb Med.2015 Jul-Aug;42(4):297-305.
• It is reported that more than 75% of 400 artisanal fisherman divers working off the Yucatan Peninsula experience decompression sickness (DCS) each year, making DCS an epidemic in this region. These divers use primitive hookah diving support systems (HDSS). Breathing air is supplied from inadequately
• PMID 26403015

• Development of a flow rate monitoring method for the wearable ventricular assist device driver.

• Ohnuma K1, Homma A, Sumikura H, Tsukiya T, Takewa Y, Mizuno T, Mukaibayashi H, Kojima K, Katano K, Taenaka Y, Tatsumi E.
• Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs.J Artif Organs.2015 Jun;18(2):106-13. doi: 10.1007/s10047-014-0811-z. Epub 2014 Dec 13.
• Our research institute has been working on the development of a compact wearable drive unit for an extracorporeal ventricular assist device (VAD) with a pneumatically driven pump. A method for checking the pump blood flow on the side of the drive unit without modifying the existing blood pump and im
• PMID 25500948

Japanese Journal

• 排ガス流量計とジルコニア空燃比計を用いた燃料消費率の瞬時計測

• 秋田 将伸,中村 博司,足立 正之
• 自動車技術会論文集 45(1), 155-160, 2014-01
• NAID 40019962425

• An Open-flow Chamber with a Multiple CO2-Gas Analyzing System for Continuous Measurement of Soil Respiration in a Greenhouse

• YASUTAKE Daisuke,OKADA Eichi,INO Aya,HOSOKAWA Takuya,TAKAHASHI Naoyuki,TAKAHASHI Akihiko,KUBAI Kuniaki,MORI Makito,YAMANE Shinzo,MIYAUCHI Kiyoshi
• Environmental Control in Biology 52(1), 7-12, 2014
• … An open-flow chamber equipped with a multiple CO2-gas analyzing system (MGA) was developed for the continuous measurement of the soil respiration rate in a greenhouse. … The air from the inlet and outlet of the chamber is sampled, and then, its CO2-gas concentration is analyzed by the MGA, which consists of an infrared gas analyzer, an air pump, a flow meter, and a programmable data logger. …
• NAID 130003395221

• 空中超音波による非接触型流量計における配管内超音波特性 (超音波)

• 塚田 圭祐,都築 宣嘉,木倉 宏成
• 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 113(68), 29-34, 2013-05-27
• NAID 40019659451

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★リンクテーブル★

リンク元	「気流速度計」
関連記事	「flow」「air」「meter」「met」「AIR」

「気流速度計」

　　[★]

英

air flow meter

関

呼吸流量計

「flow」

　　[★]

• n.

• 流れ、流動、流速、流量

• v.

• 流動する、流れる

関

current、flow rate、flow velocity、flux、mobilization、run、stream、streaming

　 　 　 　 　 　 　 　 　

「air」

　　[★]

• n.

• 空気、大気、気体

関

aerial、aero、atmosphere、atmospheric、gas

　 　 　 　 　 　 　 　 　

「meter」

　　[★]

• メートル、メーター、計る、計量する

関

metric

　 　 　 　 　 　 　

「met」

　　[★]

• meetの過去形
• →meta
• methionine

　

「AIR」

　　[★]

同

5-aminoimidazole ribotide