JPH07287583A - Active muffler - Google Patents
Active mufflerInfo
- Publication number
- JPH07287583A JPH07287583A JP6081614A JP8161494A JPH07287583A JP H07287583 A JPH07287583 A JP H07287583A JP 6081614 A JP6081614 A JP 6081614A JP 8161494 A JP8161494 A JP 8161494A JP H07287583 A JPH07287583 A JP H07287583A
- Authority
- JP
- Japan
- Prior art keywords
- noise
- transfer function
- sound
- active
- ambient temperature
- 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.)
- Pending
Links
Landscapes
- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Filters That Use Time-Delay Elements (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、能動消音装置に関し、
特にNC工作機械用の消音装置として使用される能動消
音装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an active silencer,
In particular, the present invention relates to an active silencer used as a silencer for NC machine tools.
【0002】[0002]
【従来の技術】特開昭63−5696号公報、特開平2
−92099号公報に示されているように、騒音源が発
生する騒音を特定位置に配置されたマイクロホンによう
な騒音検出手段によって検出し、騒音検出部と消音用音
響発生部との間の伝達関数により定められる演算係数を
もって演算処理することにより、入力騒音と逆位相の音
を消音用音響発生部より出力し、音波干渉により消音を
行う能動消音装置は既に知られている。2. Description of the Related Art JP-A-63-5696 and JP-A-2
As disclosed in Japanese Patent Laid-Open No. 92099, noise generated by a noise source is detected by noise detecting means such as a microphone arranged at a specific position, and the noise is transmitted between the noise detecting section and the noise reducing sound generating section. There is already known an active muffling device that performs sound processing with a calculation coefficient determined by a function to output a sound having a phase opposite to that of the input noise from a sound deadening sound generation unit and muffle the sound by sound wave interference.
【0003】[0003]
【発明が解決しようとする課題】騒音検出部と消音用音
響発生部との間の騒音伝達関数は周囲温度に依存して変
化するから、この騒音伝達関数が固定設定されている
と、周囲温度の変化により演算係数が適合値よりずれ、
能動消音装置は良好な能動消音を行わなくなる。Since the noise transfer function between the noise detecting section and the sound-deadening sound generating section changes depending on the ambient temperature, if this noise transfer function is fixedly set, the ambient temperature The calculation coefficient deviates from the conforming value due to the change of
Active silencers do not provide good active silence.
【0004】本発明は、上述の如き問題点に着目してな
されたものであり、周囲温度が変化しても常に良好な能
動消音を行う能動消音装置を提供することを目的として
いる。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an active muffling device that always performs good active muffling even when the ambient temperature changes.
【0005】[0005]
【課題を解決するための手段】上述の如き目的は、本発
明によれば、騒音検出部と消音用音響発生部との間の騒
音伝達関数により定められる演算係数による演算処理に
より入力騒音と逆位相の音を消音用音響発生手段より出
力し、音波干渉により消音を行う能動消音装置におい
て、各周囲温度毎に対応する騒音伝達関数を記憶した記
憶手段と、周囲温度を検出する温度検出手段とを有し、
前記温度検出手段が検出する周囲温度に対応する騒音伝
達関数を前記記憶手段より読み出して読み出し騒音伝達
関数に基づいて前記演算係数を変更するよう構成されて
いることを特徴とする能動消音装置によって達成され
る。SUMMARY OF THE INVENTION According to the present invention, the above-described object is obtained by performing an operation process based on an operation coefficient determined by a noise transfer function between a noise detection section and a sound-deadening sound generation section, and inversely calculating the input noise. In an active muffling apparatus that outputs a sound of a phase from a sound deadening sound generation unit and muffles sound by sound wave interference, a storage unit that stores a noise transfer function corresponding to each ambient temperature, and a temperature detection unit that detects the ambient temperature. Have
A noise canceling function corresponding to the ambient temperature detected by the temperature detecting means is read from the storage means, and the operation coefficient is changed based on the read noise transfer function. To be done.
【0006】また本発明による能動消音装置は、NC工
作機械用の消音装置として使用され、NC装置と通信可
能に接続されて前記記憶手段としてNC装置が内蔵する
記憶手段を使用することを特徴としてよい。Further, the active muffler according to the present invention is used as a muffler for an NC machine tool, and is characterized in that it is connected to the NC device so as to be communicable therewith and uses a storage means incorporated in the NC device as the storage means. Good.
【0007】[0007]
【作用】上述の如き構成によれば、温度検出手段が検出
する周囲温度に応じて演算係数が設定され、演算係数が
周囲温度の変化に拘らず騒音検出部と消音用音響発生部
との間の実際の騒音伝達関数に常に適合したものなる。According to the above-mentioned structure, the calculation coefficient is set according to the ambient temperature detected by the temperature detecting means, and the calculation coefficient is set between the noise detecting section and the sound deadening sound generating section regardless of the change of the ambient temperature. It will always match the actual noise transfer function of.
【0008】能動消音装置がNC工作機械用の消音装置
として使用される場合には、周囲温度対応の騒音伝達関
数がNC装置の記憶手段に格納され、能動消音装置はこ
れより騒音伝達関数を読み出す。When the active silencer is used as a silencer for an NC machine tool, the noise transfer function corresponding to the ambient temperature is stored in the storage means of the NC device, and the active silencer reads the noise transfer function from this. .
【0009】[0009]
【実施例】以下に本発明の実施例を図面を用いて詳細に
説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.
【0010】図1は本発明による能動消音装置の一実施
例を示している。FIG. 1 shows an embodiment of an active muffler according to the present invention.
【0011】能動消音装置は図1にて全体を符号1によ
り示されている。この能動消音装置1はマイクロホンな
どによる騒音検出手段3と、騒音検出手段3より騒音信
号を入力するインタフェース回路5と、所定の演算係数
による演算処理により入力騒音と逆位相の音を出力する
制御を行うデジタルフィルタ7と、デジタルフィルタ7
の出力信号を入力するインタフェース回路9と、インタ
フェース回路9より信号を与えられて入力騒音と逆位相
の音を出力するスピーカなどによる音響発生手段11と
により構成されている。The active silencer is generally designated by the numeral 1 in FIG. The active noise suppressor 1 has a noise detecting means 3 such as a microphone, an interface circuit 5 for inputting a noise signal from the noise detecting means 3, and a control for outputting a sound having a phase opposite to the input noise by a calculation process using a predetermined calculation coefficient. Digital filter 7 to be performed, and digital filter 7
The interface circuit 9 for inputting the output signal of 1 and the sound generating means 11 such as a speaker which receives the signal from the interface circuit 9 and outputs a sound having a phase opposite to the input noise.
【0012】能動消音装置1はインタフェース回路13
によりNC装置15の制御用コンピュータ17と双方向
に通信可能に接続されている。またインタフェース回路
13には温度センサ19が接続されている。The active silencer 1 has an interface circuit 13
Is connected to the control computer 17 of the NC device 15 so as to be capable of bidirectional communication. A temperature sensor 19 is connected to the interface circuit 13.
【0013】NC装置15は、制御用コンピュータ17
と、不揮発性メモリによる記憶手段21と、I/O回路
23と、サーボモータ25のサーボアンプ27と、操作
パネル29とを有し、制御用コンピュータ17はプログ
ラム解析によりサーボアンプ27へ駆動指令を出力す
る。The NC device 15 includes a control computer 17
And a storage means 21 using a non-volatile memory, an I / O circuit 23, a servo amplifier 27 of a servo motor 25, and an operation panel 29. The control computer 17 issues a drive command to the servo amplifier 27 by program analysis. Output.
【0014】記憶手段21は、数値制御用のシステムプ
ログラムを記憶している共に、周囲温度毎に対応する騒
音伝達関数を記憶している。この騒音伝達関数は騒音検
出部と消音用音響発生部との間の騒音伝達関数である。The storage means 21 stores a system program for numerical control and also stores a noise transfer function corresponding to each ambient temperature. This noise transfer function is a noise transfer function between the noise detection unit and the sound deadening sound generation unit.
【0015】制御用コンピュータ17は温度センサ19
が検出する周囲温度をインタフェース回路13より取り
込み、その周囲温度に対応した騒音伝達関数を記憶手段
21より読み出してインタフェース回路13を介してデ
ジタルフィルタ7へ転送する。The control computer 17 includes a temperature sensor 19
The ambient temperature detected by is fetched from the interface circuit 13, the noise transfer function corresponding to the ambient temperature is read from the storage means 21, and transferred to the digital filter 7 via the interface circuit 13.
【0016】これによりデジタルフィルタ7は、制御用
コンピュータ17よりの騒音伝達関数に基づいて演算係
数を決定し、その演算係数による演算処理により入力騒
音と逆位相の音を出力する制御を行う。As a result, the digital filter 7 determines the calculation coefficient based on the noise transfer function from the control computer 17, and performs the control of outputting the sound having the opposite phase to the input noise by the calculation processing by the calculation coefficient.
【0017】このように、デジタルフィルタ7の演算係
数が周囲温度に応じて適応設定されることにより、周囲
温度の変化に拘らず、常に良好な能動消音が行われる。In this way, the calculation coefficient of the digital filter 7 is adaptively set according to the ambient temperature, so that good active muffling is always performed regardless of the change in the ambient temperature.
【0018】以上に於ては、本発明を特定の実施例につ
いて詳細に説明したが、本発明は、これに限定されるも
のではなく、本発明の範囲内にて種々の実施例が可能で
あることは当業者にとって明らかであろう。In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to this, and various embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.
【0019】[0019]
【発明の効果】以上の説明から理解される如く、本発明
による能動消音装置によれば、温度検出手段が検出する
周囲温度に応じて演算係数が設定され、演算係数が周囲
温度の変化に拘らず騒音検出部と消音用音響発生部との
間の実際の騒音伝達関数に常に適合したものになるか
ら、周囲温度が変化しても常に良好な能動消音が行われ
る。As can be understood from the above description, according to the active muffler of the present invention, the calculation coefficient is set according to the ambient temperature detected by the temperature detecting means, and the calculation coefficient is concerned with the change of the ambient temperature. Since it always matches the actual noise transfer function between the noise detector and the sound-deadening sound generator, good active noise suppression is always performed even if the ambient temperature changes.
【0020】また能動消音装置がNC工作機械用の消音
装置として使用される場合には、周囲温度対応の騒音伝
達関数がNC装置の記憶手段に格納されてNC装置が保
有している大容量メモリが有効利用され、騒音伝達関数
専用のメモリを必要することがない。When the active muffler is used as a muffler for NC machine tools, the noise transfer function corresponding to the ambient temperature is stored in the storage means of the NC device so that the NC device has a large capacity memory. Is effectively used and there is no need for a memory dedicated to the noise transfer function.
【図1】本発明による能動消音装置の一実施例を示すブ
ロック線図である。FIG. 1 is a block diagram showing an embodiment of an active silencer according to the present invention.
1 能動消音装置 3 騒音検出手段 7 デジタルフィルタ 11 音響発生手段 15 NC装置 17 制御用コンピュータ 19 温度センサ 21 記憶手段 1 Active Noise Suppressor 3 Noise Detection Means 7 Digital Filter 11 Sound Generation Means 15 NC Device 17 Control Computer 19 Temperature Sensor 21 Storage Means
Claims (2)
騒音伝達関数により定められる演算係数による演算処理
により入力騒音と逆位相の音を消音用音響発生手段より
出力し、音波干渉により消音を行う能動消音装置におい
て、各周囲温度毎に対応する騒音伝達関数を記憶した記
憶手段と、周囲温度を検出する温度検出手段とを有し、
前記温度検出手段が検出する周囲温度に対応する騒音伝
達関数を前記記憶手段より読み出して読み出し騒音伝達
関数に基づいて前記演算係数を変更するよう構成されて
いることを特徴とする能動消音装置。1. A sound producing unit for noise elimination outputs a sound having a phase opposite to that of the input noise by a calculation process using a calculation coefficient determined by a noise transfer function between the noise detecting unit and the sound producing unit for noise reduction, and by sound wave interference. In an active muffling device that muffles noise, it has a storage unit that stores a noise transfer function corresponding to each ambient temperature, and a temperature detection unit that detects the ambient temperature,
An active silencer, which is configured to read a noise transfer function corresponding to an ambient temperature detected by the temperature detecting means from the storage means and change the calculation coefficient based on the read noise transfer function.
れ、NC装置と通信可能に接続されて前記記憶手段とし
てNC装置が内蔵する記憶手段を使用することを特徴と
する能動消音装置。2. An active muffler used as a muffler for an NC machine tool, which is communicably connected to the NC device and uses a memory means incorporated in the NC device as the memory means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6081614A JPH07287583A (en) | 1994-04-20 | 1994-04-20 | Active muffler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6081614A JPH07287583A (en) | 1994-04-20 | 1994-04-20 | Active muffler |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07287583A true JPH07287583A (en) | 1995-10-31 |
Family
ID=13751206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6081614A Pending JPH07287583A (en) | 1994-04-20 | 1994-04-20 | Active muffler |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07287583A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1489594A3 (en) * | 2003-06-17 | 2006-05-10 | HONDA MOTOR CO., Ltd. | Active vibratory noise control apparatus for cancelling noise inside a vehicle |
CN100345183C (en) * | 2003-06-05 | 2007-10-24 | 本田技研工业株式会社 | Apparatus for and method of actively controlling vibratory noise, and vehicle with active vibratory noise control apparatus |
US7620188B2 (en) | 2003-06-17 | 2009-11-17 | Honda Motor Co., Ltd. | Cylinder responsive vibratory noise control apparatus |
-
1994
- 1994-04-20 JP JP6081614A patent/JPH07287583A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100345183C (en) * | 2003-06-05 | 2007-10-24 | 本田技研工业株式会社 | Apparatus for and method of actively controlling vibratory noise, and vehicle with active vibratory noise control apparatus |
EP1489594A3 (en) * | 2003-06-17 | 2006-05-10 | HONDA MOTOR CO., Ltd. | Active vibratory noise control apparatus for cancelling noise inside a vehicle |
CN100345182C (en) * | 2003-06-17 | 2007-10-24 | 本田技研工业株式会社 | Active vibratory noise control apparatus |
US7620188B2 (en) | 2003-06-17 | 2009-11-17 | Honda Motor Co., Ltd. | Cylinder responsive vibratory noise control apparatus |
US8160266B2 (en) | 2003-06-17 | 2012-04-17 | Honda Motor Co. Ltd. | Active vibratory noise control apparatus matching characteristics of audio devices |
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