JPS6336600B2 - - Google Patents
Info
- Publication number
- JPS6336600B2 JPS6336600B2 JP8730080A JP8730080A JPS6336600B2 JP S6336600 B2 JPS6336600 B2 JP S6336600B2 JP 8730080 A JP8730080 A JP 8730080A JP 8730080 A JP8730080 A JP 8730080A JP S6336600 B2 JPS6336600 B2 JP S6336600B2
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- output
- integrator
- voice coil
- measuring device
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
本発明は簡単な方法でダイナミツク型スピーカ
の有効力係数が測定できるようにしたスピーカの
測定装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker measuring device that can measure the effective force coefficient of a dynamic speaker using a simple method.
第１図ａ，ｂは一般的なスピーカ界磁部の断面
と磁束密度Ｂの分布を示したものである。第１図
において１はプレート、２はセンターポール、３
はマグネツト、４はボビン、５はボイスコイルで
ある。ボイスコイル５は巻幅Ｗをもつている。磁
束密度Ｂは、ボイスコイル５の位置ｘによつて変
化するが、上記ボイスコイル５が受ける上記有効
力係数Ｋは次式によつて表わされる。 FIGS. 1a and 1b show the cross section of a typical speaker field part and the distribution of magnetic flux density B. In Figure 1, 1 is a plate, 2 is a center pole, and 3 is a plate.
is a magnet, 4 is a bobbin, and 5 is a voice coil. The voice coil 5 has a winding width W. The magnetic flux density B changes depending on the position x of the voice coil 5, and the effective force coefficient K that the voice coil 5 receives is expressed by the following equation.
Ｋ＝∫x2 x1Ｂ（ｘ）Ldx ……(1)
但しＬは軸方向単位距離当りの導体量
すなわち、第１図ｂにおけるクロスハツチ部分
によつて表わされる。 K=∫ x2 x1 B(x)Ldx (1) where L is the amount of conductor per unit distance in the axial direction, that is, it is represented by the crosshatched portion in FIG. 1b.
従来、このような有効力係数Ｋを求める場合に
は、第２図に示すようにガウスメータのプローブ
６の先端にホール素子７を取付け、このホール素
子７を第２図矢印Ａ方向に移動させることによつ
て磁束Ｂ（ｘ）を測定し、その後(1)式によつて有
効力係数Ｋを計算するという方法をとらねばなら
なかつたから、測定に非常に時間がかかるという
問題があつた。 Conventionally, when determining such an effective force coefficient K, a Hall element 7 was attached to the tip of a Gaussmeter probe 6 as shown in Fig. 2, and the Hall element 7 was moved in the direction of arrow A in Fig. 2. Since it was necessary to measure the magnetic flux B(x) using Equation (1) and then calculate the effective force coefficient K using Equation (1), there was a problem in that the measurement took a very long time.
本発明はこのような問題を解決し、簡単な方法
でダイナミツク型スピーカの有効力係数が求めら
れるようにしたスピーカの測定装置を提供するも
のである。 The present invention solves these problems and provides a speaker measuring device that can determine the effective force coefficient of a dynamic speaker using a simple method.
以下本発明の一実施例を第３図とともに説明す
る。 An embodiment of the present invention will be described below with reference to FIG.
第３図において、数Hz程度の信号源８の出力と
数10Hz以上の信号源９の出力を加算器１０によつ
て加算し、増幅器１１の出力によつて加振器１２
を振動させ、ダイナミツクスピーカ１４のボイス
コイル１５と、加速度検出器１３を駆動する。ボ
イスコイル１５の出力１６をハイパスフイルタ２
３を通して積分器１７に印加する。また加速度検
出器１３からの出力１８は、ローパスフイルタ２
４を通して２重積分器１９に印加する。そして積
分器１７の出力２０と２重積分器１９の出力２１
は表示装置２２に印加される。 In FIG. 3, the output of the signal source 8 of about several Hz and the output of the signal source 9 of several tens of Hz or more are added by an adder 10, and the output of the amplifier 11 is used to add the output of the signal source 8 to the vibrator 12.
vibrates to drive the voice coil 15 of the dynamic speaker 14 and the acceleration detector 13. The output 16 of the voice coil 15 is passed through the high pass filter 2.
3 to the integrator 17. Furthermore, the output 18 from the acceleration detector 13 is filtered through a low pass filter 2.
4 to the double integrator 19. Then, the output 20 of the integrator 17 and the output 21 of the double integrator 19
is applied to the display device 22.
上記構成において、ダイナミツク型スピーカ１
４のボイスコイル１５の出力電圧ｅは、磁束を
φ、ボイスコイル位置をｘとして次式で表わされ
る。 In the above configuration, the dynamic type speaker 1
The output voltage e of the voice coil 15 of No. 4 is expressed by the following equation, where φ is the magnetic flux and x is the voice coil position.
ｅ＝−dφ／dt ……(2)
φ＝Ｂ（ｘ）lx ……(3)
但しｌはボイスコイル導体長
故にｅ＝−Ｂ（ｘ）ｌdx／dt ……(4)
従つて有効力係数Ｋは
Ｋ＝∫x2 x1Ｂ（ｘ）Ldx
＝Ｌ／ｌ∫B（ｘ）ldx
＝Ｌ／ｌ∫edt ……(5)
となり、積分器１７の出力２０が有効力係数Ｋに
比例する量となる。 e=-dφ/dt...(2) φ=B(x)lx...(3) However, since l is the length of the voice coil conductor, e=-B(x)ldx/dt...(4) Therefore, the effective force The coefficient K is K=∫ x2 x1 B(x)Ldx =L/l∫B(x)ldx =L/l∫edt...(5), and the output 20 of the integrator 17 is proportional to the effective force coefficient K. amount.
一方、加速度検出器１３からの加速度出力１８
をαとすると、２重積分器１９の出力ｘは
ｘ＝∫∫α（dt）2 ……(6)
となり、これがボイスコイル１５の変位ｘを表わ
すことになる。従つて上記ボイスコイル位置ｘと
上記有効力係数ｋが各々出力２１，２０として得
られ、これを表示装置２２の横軸、縦軸へ加えれ
ば、上記有効力係数ｋがボイスコイル位置ｘの関
数として表示されることになる。 On the other hand, acceleration output 18 from acceleration detector 13
When α is the output x of the double integrator 19, x=∫∫α(dt) 2 (6), which represents the displacement x of the voice coil 15. Therefore, the voice coil position x and the effective force coefficient k are obtained as outputs 21 and 20, respectively, and if these are added to the horizontal and vertical axes of the display device 22, the effective force coefficient k becomes a function of the voice coil position x. will be displayed as.
尚、表示装置２２としては、オツシロスコープ
やグラフイツクデイスプレイを用いることができ
る。 Incidentally, as the display device 22, an oscilloscope or a graphic display can be used.
また必ずしも上記表示装置２２を用いなくて
も、電圧計やプリンタから読みとつてもよい。 Further, the above-mentioned display device 22 is not necessarily used, and it may be read from a voltmeter or a printer.
更に変位を検出するためには、加速度検出器１
３と２重積分器１９の組み合わせでなくても、他
の変位検出器例えば静電型ピツクアツプでもよ
い。 In order to further detect displacement, acceleration detector 1
3 and the double integrator 19, other displacement detectors such as an electrostatic pickup may be used.
以上のように本発明によれば、従来時間を要し
たスピーカの有効力係数の測定が自動的に行なわ
れるようになり、測定の効率化を進めることがで
きる。 As described above, according to the present invention, the effective force coefficient of a speaker can be automatically measured, which conventionally took time, and the efficiency of the measurement can be improved.
第１図ａ，ｂは一般的なスピーカ界磁部の断面
図およびその磁束密度分布を示す図、第２図は従
来の測定装置を示す断面図、第３図は本発明の一
実施例の回路図である。
８，９……信号源、１２……加振器、１３……
加速度検出器、１４……ダイナミツク型スピー
カ、１５……ボイスコイル、１７……積分器、１
９……２重積分器、２２……表示装置、２３……
ハイパスフイルタ、２４……ローパスフイルタ。
Figures 1a and b are cross-sectional views of a typical speaker field section and its magnetic flux density distribution, Figure 2 is a cross-sectional view of a conventional measuring device, and Figure 3 is a cross-sectional view of a conventional measuring device. It is a circuit diagram. 8, 9... Signal source, 12... Exciter, 13...
Acceleration detector, 14...Dynamic speaker, 15...Voice coil, 17...Integrator, 1
9...Double integrator, 22...Display device, 23...
High pass filter, 24...Low pass filter.
Claims (1)
る加振器と、上記振動系の変位を検出する変位検
出装置と、上記ダイナミツク型スピーカのボイス
コイルの出力側に接続された積分器の出力から上
記ダイナミツク型スピーカの有効力係数を測定す
るようにしたスピーカの測定装置。 ２ 特許請求の範囲第１項において、変位検出装
置を、振動系に装着した加速度検出器と、上記加
速度検出器の出力を２重積分する２重積分器とで
構成したことを特徴とするスピーカの測定装置。 ３ 特許請求の範囲第１項または第２項におい
て、変位検出装置の出力と積分器の出力を、それ
ぞれ表示装置の横軸と縦軸に加えるようにしたこ
とを特徴とするスピーカの測定装置。[Claims] 1. An exciter that vibrates the vibration system of the dynamic speaker, a displacement detection device that detects displacement of the vibration system, and an integrator connected to the output side of the voice coil of the dynamic speaker. A speaker measuring device configured to measure the effective force coefficient of the dynamic type speaker from the output of the speaker. 2. A speaker according to claim 1, characterized in that the displacement detection device is comprised of an acceleration detector attached to a vibration system and a double integrator that double-integrates the output of the acceleration detector. measuring device. 3. A speaker measuring device according to claim 1 or 2, characterized in that the output of the displacement detection device and the output of the integrator are added to the horizontal and vertical axes of a display device, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8730080A JPS5713900A (en) | 1980-06-26 | 1980-06-26 | Measuring instrument for speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8730080A JPS5713900A (en) | 1980-06-26 | 1980-06-26 | Measuring instrument for speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5713900A JPS5713900A (en) | 1982-01-23 |
| JPS6336600B2 true JPS6336600B2 (en) | 1988-07-20 |
Family
ID=13910969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8730080A Granted JPS5713900A (en) | 1980-06-26 | 1980-06-26 | Measuring instrument for speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5713900A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2758532B2 (en) * | 1992-06-05 | 1998-05-28 | 三菱電機株式会社 | Sound equipment |
| CN103024655B (en) * | 2012-11-19 | 2015-01-28 | 青岛歌尔声学科技有限公司 | Detection device, system and method for earphone oscillator |
-
1980
- 1980-06-26 JP JP8730080A patent/JPS5713900A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5713900A (en) | 1982-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3076889B2 (en) | Magnetic force microscope | |
| JPS6336600B2 (en) | ||
| US4446541A (en) | Rotational geophone | |
| JP2009020057A (en) | Vibration detector | |
| JPS624641B2 (en) | ||
| JPH11142492A (en) | Magnetic sensor | |
| JPH05142090A (en) | Vibration detector | |
| JPH0614112B2 (en) | Current measuring device | |
| JP2805881B2 (en) | Vibration detector | |
| RU2062486C1 (en) | Electrodynamic transducer of earthquake-shock recorder | |
| JPH05172598A (en) | Vortex flowmeter | |
| JPH09188496A (en) | Wire rope damage detecting device | |
| SU896386A1 (en) | Mechanical stress pickup | |
| JP3829997B2 (en) | Vertical servo type accelerometer | |
| SU728100A1 (en) | Magnetic disc magnetic parameter measuring device | |
| SU808882A1 (en) | Magnetoelastic converter of mechanical force | |
| SU1138671A2 (en) | Magnetic anisotropy converter | |
| JP3007219B2 (en) | Magnetic force measuring method | |
| JP2727671B2 (en) | Magnetostrictive sensor built into the tire | |
| SU473912A1 (en) | Magnetoelastic sensor | |
| SU558154A1 (en) | Electromagnetic flow meter, speed and thickness of the liquid phase of stratified gas-liquid flows | |
| JP2710549B2 (en) | Gap tracking type magnetic length measuring device | |
| SU641287A1 (en) | Transducer for measuring magnetic anysotropy of ferromagnetic materials | |
| JPS5965202A (en) | Measuring device | |
| HU216205B (en) | Instrument for measuring roll throat |