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    Design for solenoid driving circuit based on regulations of current ripple and solenoid effective time constant for driving keys of a player piano
    1.
    发明授权
    Design for solenoid driving circuit based on regulations of current ripple and solenoid effective time constant for driving keys of a player piano 失效
    根据电流纹波和电磁线圈有效时间常数规定的电磁阀驱动电路的设计，用于驾驶演奏者钢琴的钥匙

    公开(公告)号：US5978201A

    公开(公告)日：1999-11-02

    申请号：US12063

    申请日：1998-01-22

    申请人： Yuji Fujiwara ,  Taro Kawabata ,  Yasuhiko Oba

    发明人： Yuji Fujiwara ,  Taro Kawabata ,  Yasuhiko Oba

    IPC分类号： G10F1/02 ,  G10C3/20 ,  G10H1/00 ,  H01H47/32 ,  H01H47/22

    CPC分类号： G10C3/20 ,  H01H47/325

    摘要： A solenoid driving circuit contains solenoids, each of which is driven to produce a magnetic field for driving each of keys of a player piano. A NPN transistor is provided to allow or block a flow of current across each solenoid. The solenoid is connected between a DC power source for providing a source voltage and a collector of the NPN transistor whose emitter is grounded. A drive signal, which is subjected to pulse-width modulation, is supplied to a base of the NPN transistor, so that the NPN transistor is switched over between ON and OFF. A diode is introduced to provide prescribed forward voltage for attenuation of the current across the solenoid when the NPN transistor is turned OFF. Herein, an anode of the diode is connected to a connection between the solenoid and NPN transistor, while a cathode of the diode is connected to a cathode of a zener diode having prescribed reverse voltage. An anode of the zener diode is connected to the DC power source. An effective time constant of the solenoid is represented in a mathematical form using the forward voltage, reverse voltage and source voltage as well as a real time constant of the solenoid. So, the solenoid driving circuit designed in such a way that the effective time constant of the solenoid is sufficiently small as compared to a maximum value of an operating frequency of the key of the player piano (i.e., action cutoff frequency of the player piano).

    摘要翻译： 螺线管驱动电路包括螺线管，每个螺线管被驱动以产生用于驱动演奏者钢琴的每个键的磁场。 提供NPN晶体管以允许或阻止跨越每个螺线管的电流。 螺线管连接在用于提供源极电压的直流电源和发射极接地的NPN晶体管的集电极之间。 经受脉冲宽度调制的驱动信号被提供给NPN晶体管的基极，使得NPN晶体管在导通和截止之间切换。 当NPN晶体管截止时，引入二极管以提供规定的正向电压，以减小电磁线圈上的电流。 这里，二极管的阳极连接到螺线管和NPN晶体管之间的连接，而二极管的阴极连接到具有规定的反向电压的齐纳二极管的阴极。 齐纳二极管的阳极连接到直流电源。 使用正向电压，反向电压和电源电压以及螺线管的实时常数以数学形式表示螺线管的有效时间常数。 因此，螺线管驱动电路设计成使得螺线管的有效时间常数与演奏者钢琴的键的操作频率的最大值（即，演奏者钢琴的动作截止频率）相比足够小， 。

    Performance operator control apparatus
    2.
    发明申请
    Performance operator control apparatus 有权
    性能操作员控制装置

    公开(公告)号：US20050132871A1

    公开(公告)日：2005-06-23

    申请号：US11010445

    申请日：2004-12-14

    申请人： Yasuhiko Oba ,  Yuji Fujiwara ,  Tomoyuki Ura ,  Tadaharu Kato

    发明人： Yasuhiko Oba ,  Yuji Fujiwara ,  Tomoyuki Ura ,  Tadaharu Kato

    IPC分类号： G10F1/02 ,  G10H1/00 ,  G10H1/32

    CPC分类号： G10F1/02 ,  G10H1/0058 ,  G10H2240/056

    摘要： A performance operator control apparatus adapted to a player piano comprises a motion control unit and a key drive unit comprising a plurality of key I/O control ICs in connection with keys of a keyboard, which are driven by solenoids so as to realize automatic performance, wherein upon detection of electrification abnormality of solenoids or temperature abnormality, LEDs are turned on to indicate the abnormality. The key I/O control ICs receive velocity signals regarding the solenoids so as to perform feedback controls on the keys in the automatic performance. In addition, unoccupied channels of the key I/O control ICs, which are not assigned to the keys and sensors, are used to input monitoring signals and to output inspection signals. Herein, the abnormality is determined based on the difference between pre-inspection data and post-inspection data, which are transferred using a loop connection channel of the key I/O control IC.

    摘要翻译： 适用于演奏器钢琴的演奏操作员控制装置包括运动控制单元和键驱动单元，其包括与键盘的键相关联的多个键I / O控制IC，所述键由螺线管驱动以实现自动演奏， 其中，在检测到螺线管的通电异常或者温度异常时，LED点亮以指示异常。 关键的I / O控制IC接收关于螺线管的速度信号，以便在自动演奏中对键执行反馈控制。 此外，未分配给键和传感器的关键I / O控制IC的未占用通道用于输入监控信号并输出​​检查信号。 这里，基于使用密钥I / O控制IC的环路连接信道传送的检查前数据和检查后数据之间的差异来确定异常。

    Data converter for producing individual music data from standard music data on the basis of the individuality of an automatic player piano learned before conversion
    5.
    发明授权
    Data converter for producing individual music data from standard music data on the basis of the individuality of an automatic player piano learned before conversion 失效
    数据转换器，用于根据在转换前学习的自动演奏钢琴的个性，从标准音乐数据产生各个音乐数据

    公开(公告)号：US06051762A

    公开(公告)日：2000-04-18

    申请号：US26537

    申请日：1998-02-19

    申请人： Yuji Fujiwara ,  Yasuhiko Oba

    发明人： Yuji Fujiwara ,  Yasuhiko Oba

    IPC分类号： G10F1/02 ,  G10G3/04 ,  G10H1/00 ,  G01F1/02 ,  G01F3/04 ,  G01F5/00

    CPC分类号： G10G3/04 ,  G10F1/02 ,  Y10S84/07

    摘要： An ideal automatic player piano is assumed to reproduce an original performance from fundamental data representative of a fundamental forward key trajectory and a backward key trajectory; however, if an actual automatic player piano reproduces a forward key trajectory and a backward key trajectory on the basis of the fundamental data, the forward key trajectory and the backward key trajectory do not faithfully reproduce the original key motions; for this reason, the actual automatic player piano learns first offset time at the end position and second offset time at an intermediate position between the end position and the rest position so as to determine a virtual forward key trajectory and a virtual backward key trajectory, and further learns first dead time around the rest position and second dead time around the rest position so as to exactly determining first starting time at the rest position and a second starting time at the end position, thereby moving keys along composite forward/backward trajectories for imparting a final hammer velocity to a hammer associated with the key to be moved in playback.

    摘要翻译： 假设一个理想的自动演奏器钢琴从表示基本正向键轨迹和向后键轨迹的基本数据中再现原始演奏; 然而，如果实际的自动播放器钢琴基于基础数据再现前向键轨迹和向后键轨迹，则前向键轨迹和向后键轨迹不忠实地再现原始键运动; 为此，实际的自动演奏钢琴在终点位置和静止位置之间的中间位置处在结束位置和第二偏移时间学习第一偏移时间，以便确定虚拟向前键轨迹和虚拟向后键轨迹，以及 进一步学习围绕静止位置的第一死区时间和围绕静止位置的第二死区时间，从而准确地确定在静止位置处的第一开始时间和在结束位置处的第二开始时间，从而沿着复合的前向/后向轨迹移动键以传递 锤子的最终锤速度与与要在播放中移动的键相关联的锤子。

    Musical tune playback apparatus
    6.
    发明授权
    Musical tune playback apparatus 有权
    音乐回放装置

    公开(公告)号：US07295983B2

    公开(公告)日：2007-11-13

    申请号：US10447116

    申请日：2003-05-28

    申请人： Yuji Fujiwara ,  Haruki Uehara ,  Shigeki Kawai ,  Yasuhiko Oba ,  Yoshihiro Shiiya

    发明人： Yuji Fujiwara ,  Haruki Uehara ,  Shigeki Kawai ,  Yasuhiko Oba ,  Yoshihiro Shiiya

    IPC分类号： G10L21/00

    CPC分类号： G10L25/48

    摘要： A musical tune playback apparatus is basically constituted by a controller (CPU), a digital media drive (e.g., a CD drive), a hard disk drive, and a sound system. Musical tune data recorded on a digital storage media (e.g., CD) are played back and are transferred to the hard disk drive together with relative information and/or image data. When a user inputs retrieval conditions, the controller retrieves musical tune data related to relative information (or image), which substantially matches retrieval conditions. Specifically, a relative information retrieval database is stored in a data area of the hard disk drive, wherein an auto-input area automatically describes an index ID, TOC information, and history information while a manual-input area describes other data and information with regard to each musical tune that is played back. Thus, desired musical tune data are automatically retrieved from the hard disk drive with reference to the database.

    摘要翻译： 音乐回放装置基本上由控制器（CPU），数字媒体驱动器（例如CD驱动器），硬盘驱动器和声音系统构成。 记录在数字存储介质（例如CD）上的音乐数据被回放并且与相关信息和/或图像数据一起被传送到硬盘驱动器。 当用户输入检索条件时，控制器检索与相关信息（或图像）相关的音乐数据，其基本上匹配检索条件。 具体地说，相对信息检索数据库被存储在硬盘驱动器的数据区域中，其中自动输入区域自动描述索引ID，TOC信息和历史信息，而手动输入区域描述了其他数据和信息 到播放的每首乐曲。 因此，参考数据库，从硬盘驱动器自动检索所需的乐曲数据。

    Performance operator control apparatus
    7.
    发明授权
    Performance operator control apparatus 有权
    性能操作员控制装置

    公开(公告)号：US07259319B2

    公开(公告)日：2007-08-21

    申请号：US11010445

    申请日：2004-12-14

    申请人： Yasuhiko Oba ,  Yuji Fujiwara ,  Tomoyuki Ura ,  Tadaharu Kato

    发明人： Yasuhiko Oba ,  Yuji Fujiwara ,  Tomoyuki Ura ,  Tadaharu Kato

    IPC分类号： G01H1/32 ,  G01H3/00

    CPC分类号： G10F1/02 ,  G10H1/0058 ,  G10H2240/056

    摘要： A performance operator control apparatus adapted to a player piano comprises a motion control unit and a key drive unit comprising a plurality of key I/O control ICs in connection with keys of a keyboard, which are driven by solenoids so as to realize automatic performance, wherein upon detection of electrification abnormality of solenoids or temperature abnormality, LEDs are turned on to indicate the abnormality. The key I/O control ICs receive velocity signals regarding the solenoids so as to perform feedback controls on the keys in the automatic performance. In addition, unoccupied channels of the key I/O control ICs, which are not assigned to the keys and sensors, are used to input monitoring signals and to output inspection signals. Herein, the abnormality is determined based on the difference between pre-inspection data and post-inspection data, which are transferred using a loop connection channel of the key I/O control IC.

    摘要翻译： 适用于演奏器钢琴的演奏操作员控制装置包括运动控制单元和键驱动单元，其包括与键盘的键相关联的多个键I / O控制IC，所述键由螺线管驱动以实现自动演奏， 其中，在检测到螺线管的通电异常或者温度异常时，LED点亮以指示异常。 关键的I / O控制IC接收关于螺线管的速度信号，以便在自动演奏中对键执行反馈控制。 此外，未分配给键和传感器的关键I / O控制IC的未占用通道用于输入监控信号并输出​​检查信号。 这里，基于使用密钥I / O控制IC的环路连接信道传送的检查前数据和检查后数据之间的差异来确定异常。

    Player piano reproducing special performance techniques using information based on musical instrumental digital interface standards
    9.
    发明授权
    Player piano reproducing special performance techniques using information based on musical instrumental digital interface standards 失效
    播放器钢琴使用基于乐器数字接口标准的信息再现特殊表演技术

    公开(公告)号：US6075196A

    公开(公告)日：2000-06-13

    申请号：US026847

    申请日：1998-02-20

    申请人： Yuji Fujiwara ,  Takashi Tamaki ,  Yasuhiko Oba ,  Taro Kawabata

    发明人： Yuji Fujiwara ,  Takashi Tamaki ,  Yasuhiko Oba ,  Taro Kawabata

    IPC分类号： G10F1/02 ,  G10C3/16 ,  G10H1/00 ,  G10H1/053 ,  G10H1/34 ,  G10H7/00

    CPC分类号： G10H1/344 ,  G10H1/0066

    摘要： A brand-new player piano is designed to have a compatibility with the conventional player piano and the electronic musical instrument based on the MIDI standard while providing a capability of playing a highly skilled music performance such as the performance technique of half stroke. The player piano creates a new version of performance information which uses a key-depression event frame in addition to a string-striking event frame and a key-release event frame. Herein, the string-striking event frame contains extensional information for a string-striking velocity, while the key-release event frame contains extensional information for a key-release velocity. The extensional information is not specifically defined by the MIDI standard and is neglected by the conventional player piano. The key-depression event frame, which is newly introduced by this player piano and is neglected by the conventional player piano, represents a note number and a key-depression velocity as well as extensional information for the key-depression velocity. Using the extensional information, it is possible to control each of the velocities more precisely. The performance information is recorded on a recording media. At a reproduction, the player piano produces trajectory data and position data with respect to each of the keys on the basis of the performance information. The trajectory data represent a key-depression-uniform-motion trajectory and a key-depression-slow-down trajectory along which a key moves when being depressed. The trajectory data also represent a key-release-uniform-motion trajectory and a key-release-slow-up trajectory along which the key moves when being released.

    摘要翻译： 全新的演奏器钢琴被设计为与传统的演奏者钢琴和基于MIDI标准的电子乐器兼容，同时具有演奏高度熟练的音乐表演的能力，例如半冲程的表演技术。 播放器钢琴创建一个新版本的演奏信息，除了打字事件帧和按键释放事件帧之外，还会使用按键抑制事件帧。 这里，串击事件帧包含用于串击速度的延伸信息，而密钥释放事件帧包含用于密钥释放速度的延伸信息。 扩展信息没有由MIDI标准具体定义，并被传统的演奏者钢琴忽略。 由该演奏者钢琴新引入并被传统演奏者钢琴忽略的按键抑制事件框架表示琴键数和按键速度以及按键速度的拉伸信息。 使用延伸信息，可以更精确地控制每个速度。 演奏信息被记录在记录媒体上。 在再现时，演奏者钢琴根据演奏信息产生关于每个琴键的轨迹数据和位置数据。 轨迹数据表示按键移动的按键均匀运动轨迹和按键减速轨迹。 轨迹数据也表示键释放均匀运动轨迹和按键释放缓慢轨迹，当键被释放时，键移动。