JPH0843187A - Belt noise analyzer for v-belt continuously variable transmission - Google Patents

Belt noise analyzer for v-belt continuously variable transmission

Info

Publication number
JPH0843187A
JPH0843187A JP6200193A JP20019394A JPH0843187A JP H0843187 A JPH0843187 A JP H0843187A JP 6200193 A JP6200193 A JP 6200193A JP 20019394 A JP20019394 A JP 20019394A JP H0843187 A JPH0843187 A JP H0843187A
Authority
JP
Japan
Prior art keywords
noise
belt
rotation speed
side pulley
continuously variable
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.)
Granted
Application number
JP6200193A
Other languages
Japanese (ja)
Other versions
JP3328824B2 (en
Inventor
Keisuke Ito
敬介 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aichi Machine Industry Co Ltd
Original Assignee
Aichi Machine Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aichi Machine Industry Co Ltd filed Critical Aichi Machine Industry Co Ltd
Priority to JP20019394A priority Critical patent/JP3328824B2/en
Publication of JPH0843187A publication Critical patent/JPH0843187A/en
Application granted granted Critical
Publication of JP3328824B2 publication Critical patent/JP3328824B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To analyze the belt noise when the input number of revolutions and the change gear ratio of a V-belt continuously variable transmission are altered. CONSTITUTION:The belt noise analyzer for a V-belt continuously variable transmission comprises number-of-revolutions detectors 2A, 2B for detecting the numbers of revolutions of drive side and driven side pulleys, respectively, a sound level meter 1 for detecting noise, an FV converter 5 for FV-converting the signals from the detectors 2A, 2B, a frequency analyzer 4 inputting the signal from the meter 1 to analyze the frequency and the amplitude of the noise and to store them, and a personal computer 6 inputting the signal from the converter 5 to calculate the input number of revolution and the change gear ratio of the transmission and fetching the frequency and the amplitude of the noise from the analyzer 4 to measure the belt noise varying in the input number and the ratio and to display them.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、Vベルト式無段変速機
の運転中に発生するベルトノイズの解析装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for analyzing belt noise generated during operation of a V-belt type continuously variable transmission.

【0002】[0002]

【従来の技術】従来、Vベルト式無段変速機の運転中に
発生するベルトノイズの解析装置として図2に示すよう
な構成のものがある。図2に示すように、上記ベルトノ
イズ解析装置は、Vベルト式無段変速機の運転中に発生
するノイズを検出する騒音計21と、ギヤの回転数(入
力回転数)を検出する回転数検出器22とをデ−タレコ
−ダ23の入力側に接続し、ノイズと回転数の両方のデ
−タを同時に記録するとともに、そのデ−タレコ−ダ2
3の出力側に接続された周波数分析器24に対してノイ
ズデ−タと回転数デ−タとを伝送し、その周波数分析器
24で回転数に対応した周波数を分析するように構成さ
れている。
2. Description of the Related Art Conventionally, an apparatus for analyzing belt noise generated during operation of a V-belt type continuously variable transmission has a structure as shown in FIG. As shown in FIG. 2, the belt noise analysis device includes a noise meter 21 for detecting noise generated during the operation of the V-belt type continuously variable transmission, and a rotation speed for detecting the rotation speed (input rotation speed) of the gear. The detector 22 is connected to the input side of the data recorder 23 to record both noise and rotational speed data at the same time, and the data recorder 2
The noise analyzer and the rotational speed data are transmitted to the frequency analyzer 24 connected to the output side of the No. 3, and the frequency analyzer 24 analyzes the frequency corresponding to the rotational speed. .

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記従
来のVベルト式無段変速機のベルトノイズ解析装置にあ
っては、入力回転数の変化に対応したノイズの解析は可
能であるが、Vベルトなどの回転数変化だけでなく、変
速比の変化に応じて発生するノイズの解析は不可能であ
るという問題がある。そこで本発明では、Vベルト式無
段変速機の変速比が変化しても、その変速比変化におけ
るノイズの解析も可能にすることを、解決すべき課題と
するものである。
However, in the conventional belt noise analysis device for the V-belt type continuously variable transmission, although the noise corresponding to the change in the input rotational speed can be analyzed, the V-belt type noise analysis device can be used. There is a problem in that it is impossible to analyze not only the change in the number of revolutions, but also the noise generated according to the change in the gear ratio. Therefore, it is an object of the present invention to enable analysis of noise in the change of the gear ratio even if the gear ratio of the V-belt type continuously variable transmission changes.

【0004】[0004]

【課題を解決するための手段】本発明では、上記課題を
解決するため、固定プ−リ及びこの固定プ−リと離接可
能な可動プ−リから成る駆動側プ−リと、その駆動側プ
−リと同様に構成された従動側プ−リと、前記駆動側プ
−リと前記従動側プ−リ間に巻き掛けられたVベルトと
を備え、前記駆動側プ−リもしくは前記従動側プ−リの
少なくとも一方のプ−リ間隔を変化させて前記駆動側プ
−リに巻き掛けられる前記Vベルトの巻き付け径を変化
させることにより変速するVベルト式無段変速機のベル
トノイズを検知して解析するVベルト式無段変速機のベ
ルトノイズ解析装置を、前記駆動側プ−リの回転数と前
記従動側プ−リの回転数とを検出する回転数検出手段
と、その回転数検出手段により前記回転数が検出されて
いるときに発生するノイズを検出する騒音計と、前記回
転数検出手段で検出された前記前記駆動側プ−リの回転
数及び前記従動側プ−リの回転数対応の回転数検出信号
をF/V変換して出力するFVコンバ−タと、前記騒音
計で検出された前記ノイズ対応のノイズ検出信号を入力
して同ノイズの周波数と強さを分析し、記憶する周波数
分析器と、前記FVコンバ−タから出力された回転数検
出信号を入力し、前記Vベルト式無段変速機の入力回転
数と変速比を演算するとともに、前記ノイズの周波数及
び強さに対応したノイズデ−タを前記周波数分析器から
取り込むことにより、前記入力回転数と変速比とが変化
するベルトノイズを測定し、それを表示するパソコンと
を備えた構成にすることである。
According to the present invention, in order to solve the above-mentioned problems, a driving side pulley comprising a fixed pulley and a movable pulley which can be connected to and detached from the fixed pulley, and its driving. The driven pulley or the driven pulley having the same structure as the side pulley; and the V-belt wound between the driven pulley and the driven pulley. Belt noise of a V-belt type continuously variable transmission that shifts gears by changing the pulley spacing of at least one of the driven pulleys and changing the winding diameter of the V belt wound around the driving pulleys. A belt noise analysis device for a V-belt type continuously variable transmission that detects and analyzes the rotation speed detecting means for detecting the rotation speed of the drive-side pulley and the rotation speed of the driven-side pulley, and It occurs when the rotation speed is detected by the rotation speed detection means. A noise meter for detecting noise and a rotation speed detection signal corresponding to the rotation speed of the drive-side pulley and the rotation speed of the driven-side pulley detected by the rotation speed detection means are F / V converted. An FV converter for outputting and a noise detection signal corresponding to the noise detected by the sound level meter are input to analyze the frequency and intensity of the noise and store the frequency analyzer and the FV converter. The output rotation speed detection signal is input to calculate the input rotation speed and the gear ratio of the V-belt type continuously variable transmission, and noise data corresponding to the frequency and intensity of the noise is output from the frequency analyzer. By taking in, the belt noise in which the input speed and the gear ratio change is measured, and a personal computer that displays the noise is displayed.

【0005】[0005]

【作用】上記構成のVベルト式無段変速機のベルトノイ
ズ解析装置によれば、回転数検出手段により駆動側プ−
リの回転数と従動側プ−リの回転数とが検出されると、
それぞれの回転数検出信号はFVコンバ−タで電圧信号
に変換され、パソコンに入力される。一方、騒音計によ
り回転部から発生するノイズが検出されると、そのノイ
ズ検出信号は周波数分析器に入力され、同ノイズの周波
数及び強さが分析されて記憶される。また、パソコン
は、FVコンバ−タから出力された回転数検出信号を入
力し、前記Vベルト式無段変速機の入力回転数と変速比
を演算するとともに、前記ノイズの周波数及び強さに対
応したノイズデ−タを前記周波数分析器から取り込むこ
とにより、前記入力回転数と変速比とが変化するベルト
ノイズを測定し、それをグラフ等で表示する。
According to the belt noise analyzing device for the V-belt type continuously variable transmission having the above-described structure, the rotation speed detecting means is used to drive the drive side pulley.
When the rotational speed of the reel and the rotational speed of the driven pulley are detected,
Each rotation speed detection signal is converted into a voltage signal by the FV converter and input to the personal computer. On the other hand, when noise generated from the rotating part is detected by the sound level meter, the noise detection signal is input to the frequency analyzer, and the frequency and intensity of the noise are analyzed and stored. Also, the personal computer inputs the rotation speed detection signal output from the FV converter, calculates the input rotation speed and the gear ratio of the V-belt type continuously variable transmission, and responds to the frequency and intensity of the noise. By taking in the noise data obtained from the frequency analyzer, the belt noise in which the input speed and the gear ratio change is measured, and is displayed in a graph or the like.

【0006】[0006]

【実施例】次に、本発明の実施例を図1を参照しながら
説明する。図1は、Vベルト式無段変速機のベルトノイ
ズ解析装置の全体的な構成を示した系統図である。駆動
側プ−リもしくは従動側プ−リの少なくとも一方のプ−
リ間隔を変化させて前記駆動側プ−リに巻き掛けられる
Vベルトの巻き付け径を変化させることにより変速する
Vベルト式無段変速機の回転部から発生するノイズを検
出する騒音計1と、駆動側プ−リの回転数(PRI回
転)と従動側プ−リの回転数(SECD回転)とをそれ
ぞれ検出する回転数検出器2A,2Bとがデ−タレコ−
ダ3の入力側に接続されている。そのデ−タレコ−ダ3
は上記ノイズ信号、及び駆動側プ−リの回転数(PRI
回転)と従動側プ−リの回転数(SECD回転)信号の
両方を同時にディスクに記録し保管する。また、デ−タ
レコ−ダ3は、その出力側に別途接続されるリアルタイ
ム周波数分析器4に対してノイズデ−タを伝送し、その
リアルタイム周波数分析器4でノイズの周波数及び強さ
を分析するように構成されている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a system diagram showing the overall configuration of a belt noise analysis device for a V-belt type continuously variable transmission. At least one of the drive-side pulley and the driven-side pulley
A noise meter 1 for detecting noise generated from a rotating portion of a V-belt type continuously variable transmission that shifts gears by changing a re-interval and changing a winding diameter of a V-belt wound around the drive-side pulley. The rotation speed detectors 2A and 2B for detecting the rotation speed of the drive-side pulley (PRI rotation) and the rotation speed of the driven-side pulley (SECD rotation) are data records.
It is connected to the input side of D3. The data recorder 3
Is the noise signal and the rotational frequency of the drive-side pulley (PRI
Both the rotation) and the rotational frequency of the driven pulley (SECD rotation) signal are simultaneously recorded and stored on the disc. Further, the data recorder 3 transmits noise data to the real-time frequency analyzer 4 which is separately connected to the output side thereof, and the real-time frequency analyzer 4 analyzes the noise frequency and intensity. Is configured.

【0007】一方、デ−タレコ−ダ3でディスクに保管
された駆動側プ−リの回転数(PRI回転)信号と従動
側プ−リの回転数(SECD回転)信号は、別途デ−タ
レコ−ダ3に接続されるFVコンバ−タ5により電圧信
号に変換され、FVコンバ−タ5の出力側に接続された
パソコン6に伝送される。上記パソコン6はリアルタイ
ム周波数分析器4とGP−IBインタ−フェ−ス7で接
続され、パソコン6とリアルタイム周波数分析器4間の
デ−タ転送及び制御が可能になっている。
On the other hand, the rotation speed signal of the drive side pulley (PRI rotation) and the rotation speed signal of the driven side pulley (SECD rotation) stored in the disk by the data recorder 3 are separately recorded. The voltage signal is converted by the FV converter 5 connected to the converter 3 and transmitted to the personal computer 6 connected to the output side of the FV converter 5. The personal computer 6 is connected to the real-time frequency analyzer 4 by a GP-IB interface 7, and data transfer and control between the personal computer 6 and the real-time frequency analyzer 4 are possible.

【0008】以上のように構成されたVベルト式無段変
速機のベルトノイズ解析装置において、Vベルト式無段
変速機の運転中に発生するノイズが騒音計1により検出
される一方、回転数検出器2A,2Bにより駆動側プ−
リの回転数(PRI回転)と従動側プ−リの回転数(S
ECD回転)とが検出されると、デ−タレコ−ダ3は上
記ノイズ信号、及び駆動側プ−リの回転数(PRI回
転)と従動側プ−リの回転数(SECD回転)信号の両
方を同時にディスクに記録し保管する。この一旦ディス
クに保管されたデ−タは、別途デ−タレコ−ダ3を介し
リアルタイム周波数分析器4に伝送され、そのリアルタ
イム周波数分析器4はノイズの周波数及び強さを分析
し、その周波数及び強さを記憶する。尚、このリアルタ
イム周波数分析器4はディジタルフィルタによる1/N
オクタ−ブ分析器より成っている。
In the belt noise analyzer for the V-belt type continuously variable transmission configured as described above, noise generated during the operation of the V-belt type continuously variable transmission is detected by the noise level meter 1, while the number of revolutions is increased. Drive side pull-up by detectors 2A and 2B
Rotation speed of the driven pulley (PRI rotation) and rotation speed of the driven pulley (S
ECD rotation) is detected, the data recorder 3 outputs both the noise signal and both the rotation frequency of the driving side pulley (PRI rotation) and the rotation number of the driven side pulley (SECD rotation). Are recorded and stored on a disc at the same time. The data once stored in the disk is separately transmitted to the real-time frequency analyzer 4 via the data recorder 3, and the real-time frequency analyzer 4 analyzes the frequency and the strength of noise, Remember strength. The real-time frequency analyzer 4 has a digital filter of 1 / N
It consists of an octave analyzer.

【0009】また、別途デ−タレコ−ダ3から駆動側プ
−リの回転数(PRI回転)と従動側プ−リの回転数
(SECD回転)信号がFVコンバ−タ5に出力され、
同デ−タがFVコンバ−タ5で電圧信号に変換されたあ
と、パソコン6に入力されると、パソコン6はベルトノ
イズ解析プログラムに従ってVベルト式無段変速機の入
力回転数と変速比を演算するとともに、セットアップ、
タイミングトリガ等の信号授受により前記ノイズの周波
数及び強さデ−タをリアルタイム周波数分析器4から取
り込むことにより、入力回転数と変速比とが変化するV
ベルト式無段変速機の運転中に発生するベルトノイズを
測定し、それをグラフで表示したり、プリンタでプリン
トアウトすることができる。また、常にデ−タをディス
クに保管することによって、何時でも見たいデ−タを表
示させることができ、解析デ−タどうしの比較表示も可
能となる。
Further, separately from the data recorder 3, the rotational speed of the driving side pulley (PRI rotation) and the rotational speed of the driven side pulley (SECD rotation) are output to the FV converter 5.
When this data is converted into a voltage signal by the FV converter 5 and then input to the personal computer 6, the personal computer 6 determines the input speed and speed ratio of the V-belt type continuously variable transmission according to the belt noise analysis program. Calculate and setup,
By inputting the frequency and intensity data of the noise from the real-time frequency analyzer 4 by exchanging a signal such as a timing trigger, the input rotation speed and the gear ratio change.
It is possible to measure the belt noise generated during the operation of the belt type continuously variable transmission and display it in a graph or print it out on a printer. Further, by always storing the data on the disk, the desired data can be displayed at any time, and the comparison display of the analysis data can be performed.

【0010】[0010]

【発明の効果】以上のように本発明によれば、回転数検
出手段によりVベルト式無段変速機の駆動側プ−リの回
転数と従動側プ−リの回転数とが検出されると、それぞ
れの回転数検出信号はFVコンバ−タで電圧信号に変換
され、パソコンに入力される一方、騒音計により回転部
から発生するノイズが検出され、そのノイズ検出信号が
周波数分析器に入力されると、同ノイズの周波数と強さ
が分析されて記憶され、更に、パソコンは、FVコンバ
−タから出力された回転数検出信号を入力し、Vベルト
式無段変速機の入力回転数と変速比を演算するととも
に、前記ノイズの周波数及び強さデ−タを周波数分析器
から取り込むように構成されているため、入力回転数と
変速比とが変化するVベルト式無段変速機のベルトノイ
ズを測定し、それをグラフ等で表示することができると
いう効果がある。
As described above, according to the present invention, the rotation speed detecting means detects the rotation speed of the drive-side pulley and the rotation speed of the driven-side pulley of the V-belt type continuously variable transmission. And each rotation speed detection signal is converted into a voltage signal by the FV converter and input to the personal computer, while noise generated from the rotating part is detected by the sound level meter and the noise detection signal is input to the frequency analyzer. Then, the frequency and intensity of the noise are analyzed and stored, and the personal computer inputs the rotational speed detection signal output from the FV converter to input the rotational speed of the V-belt type continuously variable transmission. And the gear ratio are calculated, and the frequency and intensity data of the noise are fetched from the frequency analyzer. Measure the belt noise and There is an effect that can be displayed in the rough or the like.

【図面の簡単な説明】[Brief description of drawings]

【図1】Vベルト式無段変速機のベルトノイズ解析装置
の全体的な構成を示した系統図である。
FIG. 1 is a system diagram showing an overall configuration of a belt noise analysis device for a V-belt type continuously variable transmission.

【図2】Vベルト式無段変速機の従来のベルトノイズ解
析装置の全体的な構成を示した系統図である。
FIG. 2 is a system diagram showing an overall configuration of a conventional belt noise analysis device for a V-belt type continuously variable transmission.

【符号の説明】[Explanation of symbols]

1 騒音計 2A 回転数検出器 2B 回転数検出器 3 デ−タレコ−ダ 4 リアルタイム周波数分析器 5 FVコンバ−タ 6 パソコン 7 GP−IBインタ−フェ−ス 1 Sound level meter 2A Rotation speed detector 2B Rotation speed detector 3 Data recorder 4 Real time frequency analyzer 5 FV converter 6 Personal computer 7 GP-IB interface

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 固定プ−リ及びこの固定プ−リと離接可
能な可動プ−リから成る駆動側プ−リと、その駆動側プ
−リと同様に構成された従動側プ−リと、前記駆動側プ
−リと前記従動側プ−リ間に巻き掛けられたVベルトと
を備え、前記駆動側プ−リもしくは前記従動側プ−リの
少なくとも一方のプ−リ間隔を変化させて前記駆動側プ
−リに巻き掛けられる前記Vベルトの巻き付け径を変化
させることにより変速するVベルト式無段変速機のベル
トノイズを検知して解析するVベルト式無段変速機のベ
ルトノイズ解析装置であって、前記駆動側プ−リの回転
数と前記従動側プ−リの回転数とを検出する回転数検出
手段と、その回転数検出手段により前記回転数が検出さ
れているときに発生するノイズを検出する騒音計と、前
記回転数検出手段で検出された前記前記駆動側プ−リの
回転数及び前記従動側プ−リの回転数対応の回転数検出
信号をF/V変換して出力するFVコンバ−タと、前記
騒音計で検出された前記ノイズのノイズ検出信号を入力
して同ノイズの周波数及び強さを分析し、記憶する周波
数分析器と、前記FVコンバ−タから出力された回転数
検出信号を入力し、前記Vベルト式無段変速機の入力回
転数と変速比とを演算するとともに、前記ノイズの周波
数及びその強さデ−タを前記周波数分析器から取り込む
ことにより、前記入力回転数及び変速比とが変化するベ
ルトノイズを測定し、それを表示するパソコン(パ−ソ
ナルコンピュ−タ)とを備えたことを特徴とするVベル
ト式無段変速機のベルトノイズ解析装置。
1. A drive-side pulley comprising a fixed pulley and a movable pulley which can be connected to and detached from the fixed pulley, and a driven-side pulley having the same structure as the drive-side pulley. And a V-belt wound around the drive-side pulley and the driven-side pulley, and changes the pulley interval of at least one of the drive-side pulley and the driven-side pulley. The belt of the V-belt type continuously variable transmission that detects and analyzes the belt noise of the V-belt type continuously variable transmission that shifts by changing the winding diameter of the V-belt wound around the drive side pulley. A noise analyzing device, wherein a rotation speed detecting means for detecting the rotation speed of the drive-side pulley and the rotation speed of the driven-side pulley, and the rotation speed is detected by the rotation speed detecting means. With a sound level meter that detects the noise that sometimes occurs, and the rotation speed detection means An FV converter for converting the detected rotation speed of the drive-side pulley and the rotation-speed detection signal corresponding to the rotation speed of the driven-side pulley to output the signal, and the sound level meter for detecting. Further, the noise detection signal of the noise is input to analyze the frequency and intensity of the noise, and the frequency analyzer for storing and the rotation speed detection signal output from the FV converter are input, and the V-belt type A belt whose input speed and speed ratio change by calculating the input speed and speed ratio of the continuously variable transmission, and fetching the frequency of the noise and its intensity data from the frequency analyzer. A belt noise analysis device for a V-belt type continuously variable transmission, comprising a personal computer (personal computer) that measures and displays noise.
【請求項2】 測定したベルトノイズデ−タをディスク
に保管するとともに同ベルトノイズデ−タをグラフ表示
することを特徴とする請求項1のVベルト式無段変速機
のベルトノイズ解析装置。
2. A belt noise analyzer for a V-belt type continuously variable transmission according to claim 1, wherein the measured belt noise data is stored in a disk and the belt noise data is displayed in a graph.
JP20019394A 1994-08-01 1994-08-01 Belt noise analyzer for V-belt continuously variable transmission Expired - Lifetime JP3328824B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20019394A JP3328824B2 (en) 1994-08-01 1994-08-01 Belt noise analyzer for V-belt continuously variable transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20019394A JP3328824B2 (en) 1994-08-01 1994-08-01 Belt noise analyzer for V-belt continuously variable transmission

Publications (2)

Publication Number Publication Date
JPH0843187A true JPH0843187A (en) 1996-02-16
JP3328824B2 JP3328824B2 (en) 2002-09-30

Family

ID=16420352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20019394A Expired - Lifetime JP3328824B2 (en) 1994-08-01 1994-08-01 Belt noise analyzer for V-belt continuously variable transmission

Country Status (1)

Country Link
JP (1) JP3328824B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0922951A2 (en) * 1997-12-11 1999-06-16 Nissan Motor Company Limited V-belt noise tester and testing method
DE102007001195A1 (en) * 2007-01-05 2008-07-10 Siemens Ag Method and device for monitoring a belt drive on an internal combustion engine
WO2019184892A1 (en) * 2018-03-26 2019-10-03 京东方科技集团股份有限公司 Test box

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101655215B1 (en) * 2015-03-09 2016-09-07 현대자동차 주식회사 Apparatus for testing auxiliary belt system and testing system provided with the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0922951A2 (en) * 1997-12-11 1999-06-16 Nissan Motor Company Limited V-belt noise tester and testing method
EP0922951A3 (en) * 1997-12-11 1999-12-29 Nissan Motor Company Limited V-belt noise tester and testing method
DE102007001195A1 (en) * 2007-01-05 2008-07-10 Siemens Ag Method and device for monitoring a belt drive on an internal combustion engine
WO2019184892A1 (en) * 2018-03-26 2019-10-03 京东方科技集团股份有限公司 Test box

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