WO2013029466A1 - 钢琴调音检测装置及实现方法 - Google Patents

钢琴调音检测装置及实现方法 Download PDF

Info

Publication number
WO2013029466A1
WO2013029466A1 PCT/CN2012/080090 CN2012080090W WO2013029466A1 WO 2013029466 A1 WO2013029466 A1 WO 2013029466A1 CN 2012080090 W CN2012080090 W CN 2012080090W WO 2013029466 A1 WO2013029466 A1 WO 2013029466A1
Authority
WO
WIPO (PCT)
Prior art keywords
string
tuning
frequency value
laser
laser head
Prior art date
Application number
PCT/CN2012/080090
Other languages
English (en)
French (fr)
Inventor
李忠孝
Original Assignee
Li Zhongxiao
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 Li Zhongxiao filed Critical Li Zhongxiao
Publication of WO2013029466A1 publication Critical patent/WO2013029466A1/zh

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C9/00—Methods, tools or materials specially adapted for the manufacture or maintenance of musical instruments covered by this subclass
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10G—REPRESENTATION OF MUSIC; RECORDING MUSIC IN NOTATION FORM; ACCESSORIES FOR MUSIC OR MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR, e.g. SUPPORTS
    • G10G7/00—Other auxiliary devices or accessories, e.g. conductors' batons or separate holders for resin or strings
    • G10G7/02—Tuning forks or like devices

Definitions

  • the invention relates to the field of piano tuning technology, and particularly relates to a device for detecting string frequency and a detection method in a piano tuning process. Background technique
  • Piano tuning is a professional job. Tuners need to have a very sensitive hearing, can win the job, and can debug a good piano sound, usually only blind people who are uniquely sensitive to sound. Can do it. However, with the development of society, the popularity of piano in ordinary families, the tuning of the piano tuning can not meet the needs of people.
  • Chinese Patent No.: 97123257. 1 discloses a piano tuning standard generator for detecting and displaying the sound frequency corresponding to each key of the piano being tuned while the piano is being tempered, and simultaneously displaying the standard audio frequency, and The standard audio rate is compared to make a judgment that the piano rhythm is high or low and a prompt to adjust the string tight or loose is made, and the frequency of the piano is adjusted according to the prompt of the generator.
  • This type of piano tuner is actually an audio measuring instrument, and the tuning frequency of the piano tuner is still adjusted by the hand tool wrench. It is difficult for a piano tuner with low quality to adjust the piano to the best state, and the tuning accuracy is not high. Summary of the invention
  • the object of the present invention is to solve the technical problems of high precision, poor adjustment precision, and inconvenient operation of the existing piano tuning work, and a piano tuning detection device and implementation method thereof are proposed.
  • a piano tuning detecting device characterized in that the device comprises: a laser identification sticker, a laser head, a central processing unit, a storage unit and a display unit;
  • the laser identification sticker is applied to the detected string, and the string is synchronously vibrated, and a marking area identifiable by the laser head is disposed thereon;
  • the laser head, the storage unit and the display unit are respectively connected to the central processing unit, the light of the laser head is irradiated on the position of the marking area on the laser identification sticker, the sensing identification area is beaten, and the detection signal source is provided to the central processing unit, and is processed by the central processing unit.
  • the unit calculates the actual frequency value of the detected string according to the signal source, and displays it by the display unit; the storage unit is configured to pre-store the standard frequency value of the detected string, and is displayed by the central processing unit and then displayed. The unit is displayed for reference by automatic or manual tuning.
  • One half of the area of the marking area to which the laser identification is attached is a material that can reflect the light of the laser head, and the other half is a material that can absorb the light of the laser head.
  • an adjustment device coupled to the central processing unit for mounting on the string adjustment knob for adjusting the frequency of the strings.
  • a tuning detection method is implemented, characterized in that the method comprises the following steps:
  • the laser head senses the marking area of the laser identification sticker to provide a detection signal source to the central processing unit, and the central processing unit obtains the actual frequency value of the detected string according to the signal source, and is displayed by the display unit;
  • the detecting method further includes a string frequency adjusting step; the central processor compares the actual frequency value with the standard frequency value, and then sends a driving command to the adjusting device in the running direction and the angle, and the adjusting device adjusts the string according to the driving command. Adjust the knob so that the detected string frequency meets the standard and the adjustment operation is automatically completed.
  • the laser head is mounted on an adjacent string of the detected string.
  • the invention has the beneficial effects that the invention is based on the principle of reading the disc by the laser head in the optical disc drive, and the laser disc is equivalent to the disc.
  • the string vibrates, the reflected light of the laser head receiving the laser disc is constantly changing, and the number of changes is also changed.
  • the piano adjustment knob is automatically adjusted by manual adjustment or adjustment device to realize the piano.
  • the tuning operation has no special requirements for the hearing of the adjustment personnel, and can be completed by ordinary operators, and the operation is convenient and the adjustment precision is high.
  • FIG. 1 is a schematic structural view of a piano tuning detecting device of the present invention
  • the piano tuning detecting device of the present invention comprises: a laser identification sticker, a laser head, a central processing unit, A storage unit, a display unit, and an adjustment device.
  • the light from the laser head is vertically illuminated by the laser identification, and the laser light is received by the laser to identify the reflected light reflected by the marking area.
  • the laser head, the storage unit, the display unit and the adjusting device are respectively connected to the central processing unit.
  • the laser identification sticker is a thin film of light and thin material, which can be directly attached to the strings of the piano, and does not affect the normal vibration of the strings. When the strings vibrate, the laser identification stickers will also vibrate together.
  • half of the area of the marking area of the laser identification is a material that can reflect the light of the laser head, and the other half is a light that can absorb the light from the laser head. material.
  • the laser identification sticker is equivalent to an optical disk, and the identification area is equivalent to a film for recording data on the optical disk.
  • the laser head is a laser head used on a CD, a DVD, an optical drive, etc., and the light of the laser head is irradiated on the position of the marking area on the laser identification sticker.
  • the vibration of the string is received, the laser head is received every vibration period.
  • the reflected light also changes once. For example, before the strings are vibrated, the laser head light is irradiated on the material of the marking area that reflects the light from the laser head, and the light is reflected back. At this time, the output state of the laser head is maintained.
  • the output state of the laser head in each vibration period is: 10, thereby realizing the inductive identification zone bounce, and providing a detection signal source to the central processing unit, which is calculated by the central processing unit according to the signal source.
  • the actual frequency value of the detected string is displayed by the display unit.
  • the storage unit is configured to pre-store standard frequency values of all detected strings of the piano, and is adjusted by the central processing unit.
  • the adjustment device is mounted on the string adjustment knob for adjusting the string frequency.
  • the operating state of the adjusting device is output by the central processing unit in response to the actual frequency value of the detected string and the standard frequency value.
  • the driving reference includes a rotation direction and an angle parameter.
  • the method for detecting a tuning using the above apparatus includes the following steps: a. attaching a laser identification to the detected string;
  • the cU laser head senses the marking area of the laser identification sticker to provide a detection signal source to the central processing unit, and the central processing unit obtains the actual frequency value of the detected string according to the signal source, and displays it by the display unit;
  • the unit obtains the actual frequency value of the detected string according to the signal source provided by the laser head: for example, extracting the frequency value of the time after the beginning of the cyclical change of the 0. 0 ⁇ 0. 1 second as the measured value The actual frequency value of the string.
  • the central processing unit starts the adjusting device, and the central processor compares the actual frequency value with the standard frequency value, and then sends a driving command to the adjusting device in the running direction and angle, and adjusts The device adjusts the string adjustment knob according to the driving command, so that the detected string frequency conforms to the standard, and the adjustment operation is automatically completed.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Optical Head (AREA)

Abstract

钢琴调音检测装置及实现方法,涉及到钢琴调音技术领域，具体涉及到钢琴调音过程中的琴弦频率检测的装置及检测方法方面。解决现有钢琴调音工作专业要求高，调节精度差，操作不方便的技术问题，实现调音检测方法,包括有如下步骤:a、将激光识别贴贴于被检测琴弦上；b、使激光头的光线照射在激光识别贴上；c、按下被检测琴弦所对应的琴键；d、向中央处理单元提供检测信号源，检测琴弦的实际频率值；e、比对。根据光驱中激光头读碟原理，实现钢琴调音操作，对调节人员的听觉无特殊要求，普通操作人员均可完成，操作方便，调节精度高。

Description

钢琴调音检測装置及实现方法 技术领域
本发明涉及到钢琴调音技术领域,具体涉及到钢琴调音过程中的琴弦频率检测的 装置及检测方法方面。 背景技术
钢琴调音是一项专业性较高的工作.调音者需要具有非常灵敏的听觉，能胜认这 项工作，并能调试出好弹好听的钢琴声音，一般只有对声音具有独特敏感的盲人才能做到。 但是，随着社会的发展，钢琴在普通家庭中的普及，能胜认钢琴调音工作的调音师远不能满 足人们的需求。
中国专利号为：97123257. 1公开了一种钢琴调律标准发生器，该发生器用于钢琴 调律时，检测并显示被调音钢琴每一个琴键对应的声音频率，同时显示标准音频率，与标准 音频率进行比较作出钢琴音律偏高或偏低的判断并作出调节琴弦紧或松的提示，人们根据 该种发生器的提示进行调节钢琴的频率。 这种钢琴调音仪实际上是一种音频测量仪器,钢 琴调音师调节钢琴的频率仍然是人手用工具扳手进行调节。素质不高的钢琴调音师就很难 将钢琴调到最好的状态，而且调音的精度不高。 发明内容
综上所述，本发明的目的是为了解决现有钢琴调音工作专业要求高，调节精度差， 操作不方便的技术问题,而提出的一种钢琴调音检测装置及实现方法。
为解决本发明所提出的技术问题,釆用的技术方案为：钢琴调音检测装置，其特征 是所述装置包括有：激光识别贴、激光头、中央处理单元、存储单元及显示单元；
所述的激光识别贴用于贴于被检测琴弦上，随琴弦同步振动，在其上设有激光头可识 别的标识区；
所述的激光头、存储单元及显示单元分别与中央处理单元连接,激光头的光线照射于 激光识别贴上的标识区位置,感应标识区跳动，向中央处理单元提供检测信号源，由中央处 理单元根据该信号源计算得出被检测琴弦的实际频率值，并由显示单元进行显示；所述的 存储单元用于预存被检测琴弦的标准频率值，由中央处理单元调取后通过显示单元进行显 示，为自动或手动调音作参照。
所述的激光识别贴上的标识区其中一半的区域为可反射激光头照射光线的材料， 另一半为可吸收激光头照射光线的材料。
还包括有与中央处理单元连接的用于安装在琴弦调节旋纽上，用于调节琴弦频率 的调节装置。
实现调音检测方法，其特征在于所述方法包括有如下步骤：
a、将激光识别贴贴于被检测琴弦上；
b、将激光头安装在该被检测琴弦的旁边，使激光头的光线垂直照射在激光识别贴的标 识区上； c、按下被检测琴弦所对应的琴键；
d、激光头感应激光识别贴的标识区跳动，从而向中央处理单元提供检测信号源，由中 央处理单元根据该信号源得出被检测琴弦的实际频率值，并由显示单元进行显示；
e、将显示单元显示的被检测琴弦的实际频率值与被检测琴弦的标准频率值进行比对， 若实际频率值等于标准频率值，或实际频率值与标准频率值误差在预定范围内，则表示该 被检测琴弦频率符合标准。
所述的检测方法还包括有琴弦频率调节步骤；中央处理器将实际频率值与标准频 率值进行比对后，向调节装置发出运转方向及角度的驱动指令，调节装置根据驱动指令调 节琴弦调节旋纽，使该被检测琴弦频率符合标准，自动完成调节操作。
所述的激光头安装在该被检测琴弦的相邻的琴弦上。
本发明的有益效果为：本发明是根据光驱中激光头读碟原理，激光识别贴相当于 光碟，琴弦振动时,激光头接收到激光识别贴的反射光线不停变化,变化的次数也就相当于 该琴弦的实际频率值，通过与标准频率值进行比对就可得知琴弦是过紧或是过松，然后通 过手动调节或是调节装置自动调节琴弦调节旋纽，实现钢琴调音操作，对调节人员的听觉 无特殊要求，普通操作人员均可完成，操作方便，调节精度高。 附图说明
图 1为本发明的钢琴调音检测装置结构示意图；
图 2为本发明的调音检测方法工作流程图。 具体实施方式
以下结合附图和优选的具体实施方式对本发明的技术方案作进一步地说明 - 参照图 1中所示，本发明的钢琴调音检测装置，包括有：激光识别贴、激光头、中央处理 单元、存储单元、显示单元及调节装置。 激光头的光线垂直照射激光识别贴上，同时接收激 光识别贴上设置的标识区反射回的光线，所述的激光头、存储单元、显示单元及调节装置分 别与中央处理单元连接。
所述的激光识别贴为一种轻薄材料的贴膜，能够直接贴在钢琴的琴弦上，几乎是 不影响琴弦的正常振动，琴弦振动时，激光识别贴也就随之一起同步振动。为了使激光头能 感应到激光识别贴随琴弦同步振动，所述的激光识别贴上的标识区其中一半的区域为可反 射激光头照射光线的材料，另一半为可吸收激光头照射光线的材料。 激光识别贴相当于光 盘，该标识区就相当于光盘上用于记录数据的贴膜。
所述的激光头为 CD、 DVD、光驱等设备上使用的激光头，激光头的光线照射于激光 识别贴上的标识区位置，当在琴弦振动过程中，每一个振动周期激光头接收到反射回的光 线也就发生一次变化，例如，当琴弦未振动之前，激光头光线照射在标识区的可反射激光 头照射光线的材料上，光线被反射回来，此时激光头的输出状态保持为 1；当琴弦开始振动 后，每一个振动周期激光头的输出状态为：10，从而实现感应标识区跳动，向中央处理单元 提供检测信号源，由中央处理单元根据该信号源计算得出被检测琴弦的实际频率值，并由 显示单元进行显示。
所述的存储单元用于预存钢琴所有被检测琴弦的标准频率值，由中央处理单元调
2
替 （ 第 26条) 取后通过显示单元进行显示，为自动或手动调音作参照。 当然，在具体实施过程中，也可以 不需要将标准频率值预存大存储单元，可以依靠操作人员的记忆或其它参照实现手动调 音
为了实现自动调音操作，将调节装置安装在琴弦调节旋纽上，用于调节琴弦频率。 调节装置的工作状态由中央处理单元根据被检测琴弦的实际频率值与标准频率值进行比 对后下发驱动指令。 所述的驱动指邻包括有旋转方向及角度参数。
参照图 2中所示，用上述的装置实现调音检测方法，包括有如下步骤： a、将激光识别贴贴于被检测琴弦上；
b、将激光头安装在该被检测琴弦的旁边，最好是安装在相邻的琴弦上，使激光头的光 线垂直照射在激光识别贴的标识区上；
c、按下被检测琴弦所对应的琴键，使该琴弦发生振动；
cU激光头感应激光识别贴的标识区跳动，从而向中央处理单元提供检测信号源，由中 央处理单元根据该信号源得出被检测琴弦的实际频率值，并由显示单元进行显示；中央处 理单元根据激光头提供的信号源得出被检测琴弦的实际频率值的方式：例如，提取琴弦在 开始发生周期性变化后的第 0. 0Γ0. 1秒这段时间频率值作为该被测琴弦的实际频率值。
e、将显示单元显示的被检测琴弦的实际频率值与被检测琴弦的标准频率值进行 比对，若实际频率值等于标准频率值，或实际频率值与标准频率值误差在预定范围内，则表 示该被检测琴弦频率符合标准；否则由中央处理单元启动调节装置，中央处理器将实际频 率值与标准频率值进行比对后，向调节装置发出运转方向及角度的驱动指令,调节装置根 据驱动指令调节琴弦调节旋纽,使该被检测琴弦频率符合标准，自动完成调节操作。
3
替 （ 第 26条)

Claims

权利 要 求 书
1.钢琴调音检测装置，其特征是所述装置包括有：激光识别贴、激光头、中央处理单 元、存储单元及显示单元； 所述的激光识别贴用于贴于被检测琴弦上，随琴弦同步振动， 在其上设有激光头可识别的标识区； 所述的激光头、存储单元及显示单元分别与中央处 理单元连接，激光头的光线照射于激光识别贴上的标识区位置，感应标识区跳动，向中央处 理单元提供检测信号源，由中央处理单元根据该信号源计算得出被检测琴弦的实际频率 值，并由显示单元进行显示；所述的存储单元用于预存被检测琴弦的标准频率值，由中央处 理单元调取后通过显示单元进行显示,为自动或手动调音作参照。
2. 根据权利要求 1所述的钢琴调音检测装置，其特征是：所述的激光识别贴上的标识 区其中一半的区域为可反射激光头照射光线的材料，另一半为可吸收激光头照射光线的材 料。
3.根据权利要求 1所述的钢琴调音检测装置，其特征是：还包括有与中央处理单元连 接的用于安装在琴弦调节旋纽上，用于调节琴弦频率的调节装置。
4. 一种应用权利要求 1〜 3中任一项所述钢琴调音检测装置实现调音检测方法，其特 征在于所述方法包括有如下步骤：
a、将激光识别贴贴于被检测琴弦上；
b、将激光头安装在该被检测琴弦的旁边,使激光头的光线垂直照射在激光识别贴的标 识区上；
c、按下被检测琴弦所对应的琴键；
d、激光头感应激光识别贴的标识区眺动，从而向中央处理单元提供检测信号源，由中 央处理单元根据该信号源得出被检测琴弦的实际频率值，并由显示单元进行显示；
e、将显示单元显示的被检测琴弦的实际频率值与被检测琴弦的标准频率值进行比对， 若实际频率值等于标准频率值，或实际频率值与标准频率值误差在预定范围内，则表示该 被检测琴弦频率符合标准。
5. 根据权利要求 4所述的调音检测方法，其特征是：所述的检测方法还包括有琴弦频 率调节步骤；中央处理器将实际频率值与标准频率值进行比对后，向调节装置发出运转方 向及角度的驱动指令，调节装置根据驱动指令调节琴弦调节旋纽，使该被检测琴弦频率符 合标准，自动完成调节操作。
6. 根据权利要求 4所述的调音检测方法，其特征是 .·所述的激光头安装在该被检测琴 弦的相邻的琴弦上。
4
替换页 （细则第 26条)
PCT/CN2012/080090 2011-08-30 2012-08-14 钢琴调音检测装置及实现方法 WO2013029466A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110252081.0 2011-08-30
CN 201110252081 CN102270447B (zh) 2011-08-30 2011-08-30 钢琴调音检测装置及实现方法

Publications (1)

Publication Number Publication Date
WO2013029466A1 true WO2013029466A1 (zh) 2013-03-07

Family

ID=45052727

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/080090 WO2013029466A1 (zh) 2011-08-30 2012-08-14 钢琴调音检测装置及实现方法

Country Status (2)

Country Link
CN (1) CN102270447B (zh)
WO (1) WO2013029466A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102270447B (zh) * 2011-08-30 2012-09-26 李忠孝 钢琴调音检测装置及实现方法
CN103903597A (zh) * 2014-03-22 2014-07-02 哈尔滨工程大学 基于机器视觉的钢琴电子调律方法及装置
CN103915083A (zh) * 2014-04-18 2014-07-09 深圳市蔚科电子科技开发有限公司 一种弦乐器调音方法及弦乐器调音器
WO2015161458A1 (zh) * 2014-04-23 2015-10-29 赵哲 一种弦乐器调音方法及弦乐器调音器
CN105529012A (zh) * 2016-01-21 2016-04-27 胡原原 一种钢琴调音仪器
CN107731204B (zh) * 2017-11-08 2020-05-22 崔繁 智能吉他和弦辅助装置
CN108269553A (zh) * 2018-03-26 2018-07-10 吉林大学 全自动钢琴调律装置及方法
CN108877743B (zh) * 2018-04-23 2023-01-10 南阳理工学院 一种基于音弦振动信号的钢琴音律校准装置及使用方法
CN113793576B (zh) * 2021-09-07 2024-01-09 北京星海钢琴集团有限公司 钢琴调律辅助系统及调律方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH669701A5 (en) * 1985-11-01 1989-03-31 Juerg Siegenthaler Tone sensor for string musical instrument - uses electromagnetic source and detector on opposite sides of mechanically oscillating string
US5065660A (en) * 1990-05-29 1991-11-19 Buda Eric De Piano tuning system
US20100011942A1 (en) * 2008-07-17 2010-01-21 Wessels Mark A Laser pick-up for a stringed musical instrument
CN101807391A (zh) * 2010-02-09 2010-08-18 李忠孝 钢琴自动调音装置及其自动调音的方法
CN101958115A (zh) * 2010-08-09 2011-01-26 谭福生 一种基于电子标签的半自动钢琴调音器
CN102270447A (zh) * 2011-08-30 2011-12-07 李忠孝 钢琴调音检测装置及实现方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4637341B2 (ja) * 2000-10-25 2011-02-23 株式会社コルグ 調律器
JP4534946B2 (ja) * 2005-10-12 2010-09-01 ヤマハ株式会社 調律器及びそのプログラム
CN201336131Y (zh) * 2008-12-05 2009-10-28 复旦大学附属中学 钢琴自动调音器
CN102054470A (zh) * 2009-11-05 2011-05-11 大连民族学院 一种高精度钢琴校音器及其校音方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH669701A5 (en) * 1985-11-01 1989-03-31 Juerg Siegenthaler Tone sensor for string musical instrument - uses electromagnetic source and detector on opposite sides of mechanically oscillating string
US5065660A (en) * 1990-05-29 1991-11-19 Buda Eric De Piano tuning system
US20100011942A1 (en) * 2008-07-17 2010-01-21 Wessels Mark A Laser pick-up for a stringed musical instrument
CN101807391A (zh) * 2010-02-09 2010-08-18 李忠孝 钢琴自动调音装置及其自动调音的方法
CN101958115A (zh) * 2010-08-09 2011-01-26 谭福生 一种基于电子标签的半自动钢琴调音器
CN102270447A (zh) * 2011-08-30 2011-12-07 李忠孝 钢琴调音检测装置及实现方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GAO, JINGWU ET AL.: "Application of PSD for Vibration Measure", INSTRUMENT TECHNIQUE AND SENSOR, vol. 9, September 2004 (2004-09-01), pages 30 - 31 *

Also Published As

Publication number Publication date
CN102270447B (zh) 2012-09-26
CN102270447A (zh) 2011-12-07

Similar Documents

Publication Publication Date Title
WO2013029466A1 (zh) 钢琴调音检测装置及实现方法
US9208763B2 (en) Method, apparatus and software for providing user feedback
US20160238365A1 (en) Crown Molding Protractor
Nathani et al. Beyond ba-ba and gu-gu: Challenges and strategies in coding infant vocalizations
CN110082107B (zh) 基于音频分析的微型振动马达缺陷诊断装置及缺陷识别方法
JP2007523389A5 (zh)
CN103903597A (zh) 基于机器视觉的钢琴电子调律方法及装置
CN101706426A (zh) 布儒斯特角的透明材料折射率测量仪
JP2023145584A (ja) 状態評価装置
CN103654735B (zh) 耳温测量装置和寻找最高耳温的方法
US9153221B2 (en) Timpani tuning and pitch control system
CN1193707C (zh) 辐射温度计
CN207894759U (zh) 一种手动洛式硬度仪
CN113793576B (zh) 钢琴调律辅助系统及调律方法
JPH09297864A (ja) 生産工程の作業分析に資するデータ集計方法
CN220853547U (zh) 一种空调支撑板弧度检测装置
CN109443513B (zh) 一种小提琴琴码震动检测系统
CN102082990A (zh) 膜片测试装置及其测试方法
CN202255328U (zh) 检测药溶仪篮筐底部与溶出杯底部距离的装置
KR102558114B1 (ko) 전시장용 오르골
CN107843331A (zh) 一种机械设备的振动噪音监听器
CN105222672A (zh) 多工位高精度切割砂轮测厚仪
KR200248435Y1 (ko) 현미경을 이용한 두께 측정 장치
TWM540278U (zh) 異音檢驗輔助系統
KR101450054B1 (ko) 악보 출력장치 및 그 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12828185

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHT PURSUANT TO RULE 112(1) EPC - FORM 1205A (25.07.2014)

122 Ep: pct application non-entry in european phase

Ref document number: 12828185

Country of ref document: EP

Kind code of ref document: A1