JP7355971B2 - LED emergency lighting equipment with built-in battery for MRI room - Google Patents
LED emergency lighting equipment with built-in battery for MRI room Download PDFInfo
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- JP7355971B2 JP7355971B2 JP2018168315A JP2018168315A JP7355971B2 JP 7355971 B2 JP7355971 B2 JP 7355971B2 JP 2018168315 A JP2018168315 A JP 2018168315A JP 2018168315 A JP2018168315 A JP 2018168315A JP 7355971 B2 JP7355971 B2 JP 7355971B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Description
本発明は、病院などのＭＲＩ室に設置される電池内蔵型ＬＥＤ非常用照明器具に関するものである。 The present invention relates to a battery built-in LED emergency lighting device installed in an MRI room in a hospital or the like.
ＭＲＩ室の電池内蔵型非常用照明器具には光源としてミニ電球、ハロゲン電球などの白熱電球が使用されているが、ＭＲＩ室が高磁場環境のためランプフィラメントが磁力により玉切れサイクルが短くなり、いざ停電になった場合に点灯しない危険性がある。 Incandescent light bulbs such as mini light bulbs and halogen bulbs are used as light sources in emergency lighting equipment with built-in batteries in MRI rooms, but because MRI rooms are in a high magnetic field environment, the lamp filament burns out due to magnetic force, which shortens the cycle. There is a risk that the lights may not turn on in the event of a power outage.
そのため、白熱電球の代わりにＬＥＤを光源とする照明が提案されているが、ＬＥＤを点灯させる電源は一般にノイズを発生させるスイッチング電源が使用されているので、ノイズの影響でＭＲＩ室内の医療機器が誤動作し、画像診断に影響を与え、検査ミスにつながる可能性がある。 For this reason, lighting that uses LEDs as a light source instead of incandescent bulbs has been proposed, but the power supply that lights the LEDs is generally a switching power supply that generates noise, so the medical equipment in the MRI room is affected by the noise. It may malfunction, affect image diagnosis, and lead to test errors.
前記問題点を解決するためには、電池内蔵型非常用照明器具内にノイズを発生させるスイッチング制御電源を有せず、電池内蔵型非常用照明器具の電源を電池電圧より数Ｖ高い直流低電圧とし、電池の充電および光源の点灯はスイッチング動作を行わない回路方式で、光源はＬＥＤにすることによって達成できる。 In order to solve the above problems, the battery-built-in emergency lighting equipment does not have a switching control power supply that generates noise, and the power supply for the battery-built-in emergency lighting equipment is set to a DC low voltage that is several volts higher than the battery voltage. Charging the battery and lighting the light source can be accomplished by using a circuit system that does not perform switching operations, and by using an LED as the light source.
ＭＲＩ室用電池内蔵型ＬＥＤ非常用照明器具は、直流低電圧を供給電源とし、この直流電圧で限流素子を通じて電池を充電し、停電時は電池により直接ＬＥＤモジュールを点灯させる構造とした。 The LED emergency lighting equipment with a built-in battery for MRI rooms uses DC low voltage as the power supply, charges the battery through a current limiting element with this DC voltage, and has a structure in which the battery lights up the LED module directly in the event of a power outage.
以上のように、本発明によれば電池充電は直接抵抗などの限流素子で電池を充電しているためノイズは発生せず、光源はＬＥＤを使用しているためＭＲＩ室の高磁場の影響を受けず、停電時に点灯しない不具合は発生しない。 As described above, according to the present invention, since the battery is charged directly using a current limiting element such as a resistor, no noise is generated, and since an LED is used as a light source, it is not affected by the high magnetic field in the MRI room. There are no problems with the lights not turning on during power outages.
以下、図面に基づき本発明の実施の形態を説明する。 Embodiments of the present invention will be described below based on the drawings.
図１は、本発明の実施例を示すＭＲＩ室に設置される電池内蔵型ＬＥＤ非常用照明器具の回路図の一例である。 FIG. 1 is an example of a circuit diagram of a battery built-in LED emergency lighting device installed in an MRI room, showing an embodiment of the present invention.
図１の動作を説明すると直流電圧６Ｖが印加されるとリレーＲＹ１（コイル）が動作し、ＲＹ１（ａ接点）がオンし、ＲＹ１（ｂ接点）がオフする。 To explain the operation of FIG. 1, when a DC voltage of 6 V is applied, relay RY1 (coil) operates, RY1 (a contact) is turned on, and RY1 (b contact) is turned off.
ＲＹ１（ａ接点）がオンすると電池ＢＡＴ１は抵抗Ｒ３を通して直流電圧６Ｖで充電される。電池ＢＡＴ１を３．６Ｖ品、抵抗Ｒ３を５１Ωに設定すると電池ＢＡＴ１には（６－３．６）／５１＝０．０４７Ａの電流が流れる。抵抗Ｒ３で消費されるロスは０．０４７×０．０４７×５１＝０．１１Ｗとロスは少ない。これは電源が直流低電圧で電池との電圧差が少ないためである。一般のＬＥＤ非常用照明器具は電源が交流１００Ｖまたは２００Ｖと電圧が高く、電池が数Ｖと低いためそのまま電池を抵抗を介して充電すると抵抗の発熱が高くなり実用化はできない。そのため交流の商用電源を使用するときは降圧のスイッチング回路が必要になり、その結果、ノイズが発生するためＭＲＩ室では使用できない。 When RY1 (a contact) is turned on, battery BAT1 is charged with a DC voltage of 6V through resistor R3. When the battery BAT1 is set to 3.6V and the resistor R3 is set to 51Ω, a current of (6-3.6)/51=0.047A flows through the battery BAT1. The loss consumed by the resistor R3 is 0.047×0.047×51=0.11W, which is a small loss. This is because the power source is a low DC voltage and there is little voltage difference between it and the battery. General LED emergency lighting equipment has a high voltage power supply of AC 100V or 200V, and a battery with a low voltage of several volts, so if the battery is directly charged via a resistor, the heat generated by the resistor will increase, making it impractical. Therefore, when using an AC commercial power source, a step-down switching circuit is required, which generates noise and cannot be used in an MRI room.
ＬＥＤ２は点灯中は電池ＢＡＴ１が充電中を示す表示灯である。 The LED2 is an indicator light indicating that the battery BAT1 is being charged while it is lit.
停電で直流電圧６Ｖの印加がなくなるか、非常点灯確認用点検スイッチＳＷ１を動作させるとＲＹ１（ａ接点）はオフし、ＲＹ１（ｂ接点）はオンする。同時に充電中を示す表示灯ＬＥＤ２は消灯し、電池ＢＡＴ１により非常灯モジュールＬＥＤ１は並列に接続された抵抗群Ｒ６～Ｒ１１で設定された電流で点灯する。 When the DC voltage of 6V is no longer applied due to a power outage or when the emergency lighting confirmation inspection switch SW1 is operated, RY1 (a contact) is turned off and RY1 (b contact) is turned on. At the same time, the indicator light LED2 indicating that charging is in progress is turned off, and the emergency light module LED1 is turned on by the battery BAT1 with the current set by the resistor groups R6 to R11 connected in parallel.
上記構成回路は一般に使用されているものであるが、非常灯で初めて電源電圧を直流電圧に設定したこと、直流電圧が６Ｖと定電圧のため電池電圧３．６Ｖとの電圧差が少なく、ノイズの発生する降圧スイッチング回路を使用しなくても回路損失が少ないこと、光源がＬＥＤであるためＭＲＩ室の高磁場の影響を受けず、従来の白熱電球のような非常時の不点灯の危険性はなくなること、ノイズ発生回路が存在しないためＭＲＩ室の医療機器に影響を与えず、画像診断による医療ミスが発生しないなどＭＲＩ室用電池内蔵型ＬＥＤ非常用照明器具として大いに新規性がある。充電、放電切替は接点リレーで行っているが、当然無接点リレーで行っても支障がないことは当然である。 The above configuration circuit is commonly used, but it is the first time that the power supply voltage is set to DC voltage for emergency lights, and because the DC voltage is a constant voltage of 6V, there is little voltage difference from the battery voltage of 3.6V, and noise is generated. The circuit loss is low even without using a step-down switching circuit that generates noise, and since the light source is an LED, it is not affected by the high magnetic field of the MRI room, and there is no risk of it not lighting up in an emergency like a conventional incandescent light bulb. It is highly novel as an LED emergency lighting device with a built-in battery for an MRI room, as it eliminates noise, does not have any noise generating circuit, does not affect medical equipment in the MRI room, and does not cause medical errors due to image diagnosis. Although charging and discharging switching is performed using a contact relay, it is of course possible to use a non-contact relay without any problem.
ＢＡＴ１・・・電池
Ｒ３・・・抵抗
Ｒ６～Ｒ１１・・・非常灯電流制限抵抗
ＲＹ１・・・リレー
ＬＥＤ１・・・ＬＥＤモジュール
ＬＥＤ２・・・充電表示用ＬＥＤ
ＳＷ１・・・非常灯点検スイッチBAT1...Battery R3...Resistor R6-R11...Emergency light current limiting resistor RY1...Relay LED1...LED module LED2...LED for charging display
SW1...Emergency light inspection switch
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| JP2018168315A JP7355971B2 (en) | 2018-08-21 | 2018-08-21 | LED emergency lighting equipment with built-in battery for MRI room |
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| JP2018168315A JP7355971B2 (en) | 2018-08-21 | 2018-08-21 | LED emergency lighting equipment with built-in battery for MRI room |
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| JP7355971B2 true JP7355971B2 (en) | 2023-10-04 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003204948A (en) | 2002-01-10 | 2003-07-22 | Ge Medical Systems Global Technology Co Llc | Magnetic resonance imaging system |
| JP2004253302A (en) | 2003-02-21 | 2004-09-09 | Toshiba Lighting & Technology Corp | Illumination apparatus |
| US20100244736A1 (en) | 2009-03-31 | 2010-09-30 | Faraday Pty Ltd Shielding & Design | Lighting system and lighting assembly |
| JP2015228735A (en) | 2014-05-30 | 2015-12-17 | 株式会社東芝 | Electronic equipment |
| JP2016530054A (en) | 2013-09-17 | 2016-09-29 | ザ ボード オブ トラスティーズ オブ ザ レランド スタンフォード ジュニア ユニバーシティー | Apparatus for obtaining high-quality optical images in a magnetic resonance imaging system |
| US20170374714A1 (en) | 2016-04-20 | 2017-12-28 | Matthew Murphy | Linear control device, system and method for color rendering of rgb leds |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003204948A (en) | 2002-01-10 | 2003-07-22 | Ge Medical Systems Global Technology Co Llc | Magnetic resonance imaging system |
| JP2004253302A (en) | 2003-02-21 | 2004-09-09 | Toshiba Lighting & Technology Corp | Illumination apparatus |
| US20100244736A1 (en) | 2009-03-31 | 2010-09-30 | Faraday Pty Ltd Shielding & Design | Lighting system and lighting assembly |
| JP2016530054A (en) | 2013-09-17 | 2016-09-29 | ザ ボード オブ トラスティーズ オブ ザ レランド スタンフォード ジュニア ユニバーシティー | Apparatus for obtaining high-quality optical images in a magnetic resonance imaging system |
| JP2015228735A (en) | 2014-05-30 | 2015-12-17 | 株式会社東芝 | Electronic equipment |
| US20170374714A1 (en) | 2016-04-20 | 2017-12-28 | Matthew Murphy | Linear control device, system and method for color rendering of rgb leds |
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| JP2020031041A (en) | 2020-02-27 |
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