公开(公告)号：US5652399A

公开(公告)日：1997-07-29

申请号：US673016

申请日：1996-06-28

申请人： Yuji Fujiwara ,  Taro Kawabata ,  Yasuhiko Oba ,  Shigeru Muramatsu ,  Yoshimasa Isozaki ,  Jun Ishii

发明人： Yuji Fujiwara ,  Taro Kawabata ,  Yasuhiko Oba ,  Shigeru Muramatsu ,  Yoshimasa Isozaki ,  Jun Ishii

IPC分类号： G10F1/02

CPC分类号： G10F1/02 ,  Y10S84/07

摘要： An automatic player piano controls keys to be rotated by solenoid-operated actuator units in such a manner as to pass a reference point on a trajectory of the key at a reference velocity in a playback mode, and a hammer driven by the depressed key strikes strings at the same intensity as that in a recording mode, because the intensity is variable with the reference velocity at the reference point.

摘要翻译： 自动演奏器钢琴控制按电磁操作的致动器单元旋转的键，以便以回放模式中的基准速度将键的轨迹上的参考点通过，并且由按下的键驱动的琴弦撞击琴弦 以与记录模式相同的强度，因为强度随参考点处的参考速度而变化。

公开(公告)号：US5739450A

公开(公告)日：1998-04-14

申请号：US407771

申请日：1995-03-21

申请人： Yuji Fujiwara ,  Taro Kawabata ,  Yoshimasa Isozaki ,  Yasuhiko Oba

发明人： Yuji Fujiwara ,  Taro Kawabata ,  Yoshimasa Isozaki ,  Yasuhiko Oba

IPC分类号： G10F1/02 ,  G10G3/04

CPC分类号： G10G3/04 ,  G10F1/02

摘要： An automatic player piano records an original key motion reciprocated between a rest position and an end position as a series of a key-on event, a hammer event and a key-off event by using key/hammer sensors, and supplements the key/hammer event for an unusual key motion such as a half stroke, thereby faithfully reproducing the original key motions in a playback mode.

摘要翻译： 自动播放器钢琴通过使用键/锤传感器记录在静止位置和结束位置之间往复运动的原始键运动，作为键盘事件，锤子事件和钥匙事件的一系列，并且补充键/锤 用于诸如半冲程的异常键运动的事件，从而忠实地在重放模式中再现原始键运动。

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， 。

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。

公开(公告)号：US06359207B1

公开(公告)日：2002-03-19

申请号：US09421860

申请日：1999-10-20

申请人： Yasuhiko Oba ,  Yuji Fujiwara ,  Tsutomu Sasaki ,  Shigeru Muramatsu

发明人： Yasuhiko Oba ,  Yuji Fujiwara ,  Tsutomu Sasaki ,  Shigeru Muramatsu

IPC分类号： G10H500

CPC分类号： G10H1/0033 ,  G10G3/04 ,  G10H1/344 ,  G10H2220/305

摘要： A silent automatic player piano calibrates the black/white keys so as to exactly relate a key position signal to the current key positions on the trajectory of the key by itself before a recording so that the key motions are exactly recognized in a recording operation by the silent automatic player piano.

摘要翻译： 无声自动播放器钢琴校准黑/白键，以便在记录之前将键位置信号与键的轨迹上的当前键位置精确地相关联，使得在通过记录操作的记录操作中精确地识别关键运动 沉默自动播放器钢琴。

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。

公开(公告)号：US5691489A

公开(公告)日：1997-11-25

申请号：US712962

申请日：1996-09-12

申请人： Yuji Fujiwara ,  Yasuhiko Oba ,  Jun Yamamoto

发明人： Yuji Fujiwara ,  Yasuhiko Oba ,  Jun Yamamoto

IPC分类号： G10H1/00 ,  G10C3/16 ,  G10F1/02 ,  G10F5/02 ,  G10G3/04

CPC分类号： G10F1/02 ,  G10C3/161

摘要： An automatic player piano controls a solenoid-operated key actuator so as to move a key along a quadratic curve around a turning point where the key changes the direction of the motion, and the solenoid-operated key actuator faithfully reproduce a half stroke key motion.

摘要翻译： 自动演奏器钢琴控制电磁操作的键致动器，以沿着键转动运动方向的转折点沿着二次曲线移动键，并且电磁操作键致动器忠实地再现半冲程键运动。

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。

公开(公告)号：US07381880B2

公开(公告)日：2008-06-03

申请号：US10971975

申请日：2004-10-21

申请人： Yuji Fujiwara ,  Taro Kawabata

发明人： Yuji Fujiwara ,  Taro Kawabata

IPC分类号： G10H1/00

CPC分类号： G10H1/0066 ,  G10H1/34 ,  G10H2230/011

摘要： In order to precisely express motion of a key or motion of a hammer, a voice message for the polyphonic key pressure and another voice message for the control change, which stand idle in an automatic player piano, are used to express rough key position or rough hammer position and an offset from the rough key position or rough hammer position, and the offset is described at a high resolution on an ordinary trajectory between the rest position and the end position and at a low resolution outside of the ordinary trajectory; moreover, the numerical range expressed by the third byte of the voice message for the polyphonic key pressure is divided into two numerical sub-ranges respectively assigned to the keys and hammers so that only a few voice messages are required.

摘要翻译： 为了精确地表达琴键的键或运动，用于复音键压力的语音消息和用于在自动演奏器钢琴中闲置的控制变化的另一个语音消息用于表示粗略的键位置或粗糙 锤位置和与粗略位置或粗锤位置的偏移，并且在静止位置和终点位置之间的普通轨迹上以高分辨率描述偏移并且在普通轨迹外的低分辨率处描述偏移; 此外，由复音键压力的语音消息的第三字节表示的数值范围被分成两个分别分配给键和音锤的数字子范围，使得仅需要几个语音消息。

公开(公告)号：US5627333A

公开(公告)日：1997-05-06

申请号：US654563

申请日：1996-05-29

申请人： Wayne L. Stahnke ,  Yuji Fujiwara ,  Taro Kawabata ,  Rei Furukawa ,  Takashi Tamaki

发明人： Wayne L. Stahnke ,  Yuji Fujiwara ,  Taro Kawabata ,  Rei Furukawa ,  Takashi Tamaki

IPC分类号： G10G3/04

CPC分类号： G10G3/04

摘要： A hammer sensor incorporated in a keyboard musical instrument monitors a motion of each hammer assembly, and a controller not only determines a hammer velocity and an impact time for generating a set of music data codes representative of a music performance but also measures an actual distance between the hammer sensor and an impact point against a music string on the basis of a forward trajectory and a backward trajectory measured by the hammer sensor; thereby allowing a worker to easily adjust the hammer sensor to an appropriate position.

摘要翻译： 组合在键盘乐器中的锤式传感器监测每个琴槌组件的运动，并且控制器不仅确定用于产生代表音乐表演的一组音乐数据代码的琴槌速度和冲击时间，而且还测量 基于由锤传感器测量的向前轨迹和后向轨迹，对锤音传感器和对音乐弦的撞击点; 从而允许工人容易地将锤传感器调节到适当的位置。