JPS5863820A - Measuring device for acoustic power level - Google Patents
Measuring device for acoustic power levelInfo
- Publication number
- JPS5863820A JPS5863820A JP16280681A JP16280681A JPS5863820A JP S5863820 A JPS5863820 A JP S5863820A JP 16280681 A JP16280681 A JP 16280681A JP 16280681 A JP16280681 A JP 16280681A JP S5863820 A JPS5863820 A JP S5863820A
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- stand
- power level
- computer
- acoustic power
- 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
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/35—Sound-focusing or directing, e.g. scanning using mechanical steering of transducers or their beams
- G10K11/352—Sound-focusing or directing, e.g. scanning using mechanical steering of transducers or their beams by moving the transducer
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、各種機械から放射さ扛る音のエネルギを測定
するための音響パワーレベル測定装置に係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound power level measuring device for measuring the energy of sound emitted from various machines.
従来、各種機械から発生する音のエネルギを測定するに
は被測定機械の周囲に上下位置を異ならしめた複数のマ
イクロホンを設置し、各マイクロホンへの入力信号に基
づき、音響空間での音響パワーレベルを求めたり、１本
のマイクロホンヲ機械周辺の各位置に移動し、高さを変
化させて計測し、と′ｎを記録して各周波数帯域毎に手
計算で音響パワーレベルを求めていた。Conventionally, in order to measure the sound energy generated by various machines, multiple microphones are installed at different vertical positions around the machine being measured, and the sound power level in the acoustic space is calculated based on the input signal to each microphone. The sound power level was manually calculated for each frequency band by moving one microphone to various positions around the machine, measuring it while changing its height, and recording the .
上記の方法によ扛ば、測定データの処理に多大な時間と
労力全必要とし、また他の方法として、床面にマイクロ
ホン全設置することなく、測定室の天井等からマイクロ
ホンの支持棒を懸下し、この支持棒の下端に取り付けた
マイクロホンを水平面内で回転させて、被測定機械の音
響パワーを測定する方法もあるが、支持棒の長さに制限
があり、大きな被測定機械の音響パワーレベルの測定に
対応しにくいという欠点がある。The above method requires a lot of time and effort to process the measurement data, and another method is to suspend the microphone support rod from the ceiling of the measurement room instead of installing all the microphones on the floor. There is also a method of measuring the acoustic power of the machine under test by rotating the microphone attached to the lower end of this support rod in a horizontal plane, but there is a limit to the length of the support rod, and the acoustic power of the large machine under test is limited. The drawback is that it is difficult to measure power levels.
本発明は、上記の事情に基づきなさｎ、たもので、無響
室等の測定室に走行レールを設同じ、このレール内に位
置を制御さｎて移動可能にしたマイクロホンスタンドを
設け、このスタンドに空間位置移動可能にマイクロホン
を取り付けるとともにマイクロホンからの入力信号処理
及び前記スタンド並びにマイクロホンの位置全制御する
コンピュータを備えた音響パワーレベル測定装置を提供
することを目的とする。The present invention was made based on the above-mentioned circumstances, and includes a traveling rail provided in a measurement chamber such as an anechoic chamber, a microphone stand whose position is controlled and movable within this rail, and a microphone stand which is movable by controlling its position. It is an object of the present invention to provide a sound power level measuring device equipped with a microphone mounted on a stand so as to be spatially movable, and equipped with a computer that processes input signals from the microphone and controls the entire position of the stand and the microphone.
以下に、本発明の一実施例を図面を参照して詳細に説明
する。An embodiment of the present invention will be described in detail below with reference to the drawings.
第１図は、概要を示す一部切欠斜視図、第２図はその拡
大図である。FIG. 1 is a partially cutaway perspective view showing an outline, and FIG. 2 is an enlarged view thereof.
無響室等の被測定室の床面に（１１１１而開口の一対の
走行レール１，１ヲ対向配置し、この走行レール１゜１
の間にマイクロホンスタンド２が走行するように構成さ
れている。才寿わち、マイクロホンスタンド２は、角筒
状に形成さ７ｔ、支柱部２ａ及び基部２ｂから成り、基
部２ｂの側面から車ｎｌｌ＋ ３を突出させ、この車軸
３に車輪４，４を固定する。A pair of running rails 1, 1 with openings (1111) are placed opposite each other on the floor of a room to be measured such as an anechoic chamber, and
The microphone stand 2 is configured to run between the two. In other words, the microphone stand 2 is formed into a rectangular tube shape and consists of a support portion 2a and a base portion 2b.A wheel nll+ 3 protrudes from the side surface of the base portion 2b, and wheels 4, 4 are fixed to this axle 3. .
車輪４，４は、走行レール１，１０走行溝１ａ、 ｌａ
に挿入さｎている。また、車輪４，４を有する車軸３は
、図示を略したカップリング、減速機構等を介して基部
２ｂ内に収納したモータ５の出力軸と接続さｎている。The wheels 4, 4 are connected to the running rails 1, 10 running grooves 1a, la
It is inserted into. Further, an axle 3 having wheels 4, 4 is connected to an output shaft of a motor 5 housed in the base 2b via a coupling, a speed reduction mechanism, etc., which are not shown.
一方、マイクロホンスタンド２の一側面には、鉛直方向
に上下動可能にマイクロホン６が取り付けらｎている。On the other hand, a microphone 6 is attached to one side of the microphone stand 2 so as to be vertically movable.
すなわち、マイクロホン６の一端は、ロープ７に接続さ
扛、このロープ７は、マイクロホンスタンド２の上端に
設けた滑車８を介して制御箱９内のモータに接続されて
いる。That is, one end of the microphone 6 is connected to a rope 7, and this rope 7 is connected to a motor in a control box 9 via a pulley 8 provided at the upper end of the microphone stand 2.
符号１０はコンピュータであり、このコンピュータ１０
には、音圧信号ケーブル１１及び制御信号ケーブル１２
が接続される。Reference numeral 10 is a computer, and this computer 10
includes a sound pressure signal cable 11 and a control signal cable 12.
is connected.
上記音圧信号ケーブル１１は、マイクロホン６と電気的
に接続さ扛、また上記制御信号ケーブル１２は、マイク
ロホンスタンド２を走行させるためのモータ５及びマイ
クロホン６の鉛直方向の位置を変えるための制御箱９内
のモータに電気的に接続さ扛でいる。The sound pressure signal cable 11 is electrically connected to the microphone 6, and the control signal cable 12 is connected to a motor 5 for driving the microphone stand 2 and a control box for changing the vertical position of the microphone 6. It is electrically connected to the motor in 9.
そこで、今、あらかじめ設定さｎたプログラムにしたが
いコンピュータ１０ヲ駆動−すれば、制御信号ケーブル
１２ヲ介し、モータ５に所定の信号が送らｎ、モータ５
が回転し、この回転が車軸３を介して車輪４，４に伝達
され、走行レール１，１内の走行溝１．ａ、ｌａ内を走
行し、所定の位置で停止し、マイクロホンスタンド２が
位置決めさ牡る。Therefore, if the computer 10 is now driven according to a preset program, a predetermined signal will be sent to the motor 5 via the control signal cable 12, and the motor 5 will be activated.
rotates, and this rotation is transmitted to the wheels 4, 4 via the axle 3, and the running grooves 1. It travels within a and la, stops at a predetermined position, and the microphone stand 2 is positioned.
また、マイクロホンの鉛直方向の位置も、制御信号ケー
ブル１２全介し、あらかじめ設定さ２１７コンピユータ
１０のプログラムによって制御さｎ、る。Further, the vertical position of the microphone is also controlled by a preset program 217 of the computer 10 via the control signal cable 12.
上記のようにしてマイクロホンスタンド２及びマイクロ
ホン６の位置が設定さｎると、機械等の被測定物から音
のエネルギをマイクロホン６゛によって受け、この入力
信号をコンビ、−夕１０にフィードバックさせ、演勢処
理し、所定位置での音響パワーレベル（ａＢ） ｆ：算
出し、記録する。When the positions of the microphone stand 2 and the microphone 6 are set as described above, the microphone 6 receives sound energy from an object to be measured such as a machine, and feeds this input signal back to the combination 10. Perform performance processing, calculate and record the acoustic power level (aB) f at a predetermined position.
以下同様にコンピュータプログラムにしたがいマイクロ
ホンスタンド２とマイクロホン６との位置を制御し、各
測定点での音響パワーレベルを測５一
定し、被測定物周辺の空間的な音響パワーの相違、分布
状態等を知ることができる。Thereafter, the positions of the microphone stand 2 and the microphone 6 are similarly controlled according to the computer program, and the sound power level at each measurement point is measured to be constant. can be known.
夕の制御信号によりマイクロホン全所定の位置に自動的
に設定することができ、しかも各測定点で音響パワーの
演算も自動的に行うので測定時間の短縮、労力の軽減に
寄与するところ大である。All microphones can be automatically set to predetermined positions using control signals, and the sound power is automatically calculated at each measurement point, which greatly contributes to shortening measurement time and labor. .
さらにマイクロホンを複数本設置することなく、走行レ
ール上を任意の位置まで走行させることができるので、
特に大型の被測定物の音響パワーレベルの測定に便利で
ある。Furthermore, it is possible to travel to any position on the traveling rail without installing multiple microphones.
It is particularly useful for measuring the acoustic power level of large objects under test.
なお、第３図に示すように、マイクロホンスタンド２の
長手方向に長孔１３ヲ設け、この長孔１３に支持腕１４
の摺動輪１５ヲ臨ませるとともに支持腕１４の先端部に
ロープ７ａｋ結合し、滑車８ａｋ介して図示を略したモ
ータに接続し、前記のコンピュータ１０の制御信号によ
り支持腕１４の先端に設けたマイクロホン６の水平角度
を制御するようにすることもできる。As shown in FIG. 3, a long hole 13 is provided in the longitudinal direction of the microphone stand 2, and a support arm 14 is inserted into this long hole 13.
A microphone is connected to the tip of the support arm 14 by a rope 7ak, connected to a motor (not shown) via a pulley 8ak, and is provided at the tip of the support arm 14 in response to a control signal from the computer 10. It is also possible to control the horizontal angle of 6.
６−
」−記の構成により、さらに−そう任意の空間的測定点
の設定が容易になり、そ汁に伴ない密度の高い音響パワ
ーレベルの分布’ｌｋ ｉｓＭ ｋ知ることができる。6-'' The configuration described above further facilitates the setting of arbitrary spatial measurement points, and allows the distribution of the high-density acoustic power level associated with the soup to be known.
第１図は、本発明の一実施例を示す音響パワー測定装置
の一部切欠外観斜視図、第２図は、」１記測定装置の要
部を示′ｆ部分断面図、第３図Ｃｔ１マイクロホンの水
平角度調整機構の正面図である。
１・・・走行レール、１ａ・・走行溝、２・・・マイク
ロホンスタンド、２ａ・・・支柱部、２１）・基部、３
・・・車軸、４・・・車輪、５・・・モータ、６・・・
マイクロホン、７，７ａ・・・ロープ、８，８ａ・・・
滑車、９・・・制御箱、１０・・・コンピュータ、１１
・・・音圧信号ケーブル、１２・・・制御信号ケーブノ
ペ１３・・長孔、１４・・・支持腕、１５・・・摺動輪
。
出願代理人
弁理士 菊 池 五 部FIG. 1 is a partially cutaway external perspective view of an acoustic power measuring device showing an embodiment of the present invention, FIG. FIG. 3 is a front view of the horizontal angle adjustment mechanism of the microphone. DESCRIPTION OF SYMBOLS 1... Traveling rail, 1a... Running groove, 2... Microphone stand, 2a... Support portion, 21) Base, 3
...Axle, 4...Wheel, 5...Motor, 6...
Microphone, 7, 7a... Rope, 8, 8a...
Pulley, 9... Control box, 10... Computer, 11
... Sound pressure signal cable, 12 ... Control signal cable nope 13 ... Long hole, 14 ... Support arm, 15 ... Sliding wheel. Application agent Patent attorney Gobe Kikuchi
Claims (1)
に案内さ扛て走行可能に支持したマイクロホンスタンド
と、このスタンドを駆動制御する制御系と、前記スタン
ドの鉛直方向に可滑動に支持したマイクロホンと、この
マイクロホンの位置を制御する制御系と、前記制御系に
そｎぞ牡あらかじめ設定したプログラムにしたがって制
御信号を送るとともに前記マイクロ来ンからの音響入力
信号を受けて演算処理を行なうコンピュータとを有する
ことを特徴とする音響パワーレベル測定装置・ ２、前記マイクロホンの水平角度を制御可能にした特許
請求の範囲第１項記載の音響パワーレベル測定装置。[Scope of Claims] 1. A traveling rail installed in a measurement chamber, a microphone stand supported so as to be able to travel while being guided by this traveling rail, a control system for driving and controlling this stand, and a A microphone supported in a slidable manner, a control system for controlling the position of the microphone, and a control system for sending control signals to the control system according to a preset program and for receiving acoustic input signals from the microphone. 2. The sound power level measuring device according to claim 1, wherein the sound power level measuring device comprises a computer that performs arithmetic processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16280681A JPS5863820A (en) | 1981-10-14 | 1981-10-14 | Measuring device for acoustic power level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16280681A JPS5863820A (en) | 1981-10-14 | 1981-10-14 | Measuring device for acoustic power level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5863820A true JPS5863820A (en) | 1983-04-15 |
Family
ID=15761569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16280681A Pending JPS5863820A (en) | 1981-10-14 | 1981-10-14 | Measuring device for acoustic power level |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5863820A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61213637A (en) * | 1985-03-19 | 1986-09-22 | Nippon Soken Inc | Measuring instrument for acoustic information |
| US20140233764A1 (en) * | 2013-02-21 | 2014-08-21 | Stuart Mathis | Microphone Positioning System |
| EP3164999A4 (en) * | 2014-07-06 | 2018-02-28 | Dynamount, LLC | Systems and methods for a robotic mount |
| US10306362B1 (en) | 2017-04-20 | 2019-05-28 | Dynamount, Llc | Microphone remote positioning, amplification, and distribution systems and methods |
-
1981
- 1981-10-14 JP JP16280681A patent/JPS5863820A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61213637A (en) * | 1985-03-19 | 1986-09-22 | Nippon Soken Inc | Measuring instrument for acoustic information |
| US20140233764A1 (en) * | 2013-02-21 | 2014-08-21 | Stuart Mathis | Microphone Positioning System |
| US9414144B2 (en) * | 2013-02-21 | 2016-08-09 | Stuart Mathis | Microphone positioning system |
| EP3164999A4 (en) * | 2014-07-06 | 2018-02-28 | Dynamount, LLC | Systems and methods for a robotic mount |
| US10194298B2 (en) | 2014-07-06 | 2019-01-29 | Dynamount, Llc | Systems and methods for a robotic mount |
| US10306362B1 (en) | 2017-04-20 | 2019-05-28 | Dynamount, Llc | Microphone remote positioning, amplification, and distribution systems and methods |
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