公开(公告)号：US06223321B1

公开(公告)日：2001-04-24

申请号：US09129496

申请日：1998-08-05

申请人： Masahiro Nasu ,  Takayuki Sugawara

发明人： Masahiro Nasu ,  Takayuki Sugawara

IPC分类号： G11B2018

CPC分类号： H03M13/1515 ,  G11B20/1833 ,  H03M13/29 ,  H03M13/2909

摘要： A recording/reproduction device includes a reading mechanism to read information data stored in a floppy disk and constituted by a plurality of byte data and first inspection data and second inspection data to detect an error of the information data. First and second calculation mechanism calculate a first and second syndrome value from the byte data and the first and second inspection data, respectively. First and second error correction mechanisms perform error correction for the information data on the basis of the first and second syndrome value, respectively. A computer includes the second error correction mechanism. Because the second error correction is not performed in the floppy disk drive, the capacity of a storage unit is decreased, a memory in the floppy disk drive can be considerably smaller than that of a conventional floppy disk drive, and the cost of the floppy disk drive can be reduced. In addition, since secondary correction is not performed in the floppy disk drive, an increase in data transfer rate from the floppy disk drive to the computer can be realized.

摘要翻译： 记录/再现装置包括读取机构，用于读取存储在软盘中并由多个字节数据和第一检查数据构成的信息数据和第二检查数据，以检测信息数据的错误。 第一和第二计算机构分别从字节数据和第一和第二检查数据计算第一和第二校正值。 第一和第二纠错机构分别基于第一和第二综合征值对信息数据进行纠错。 计算机包括第二纠错机构。 由于在软盘驱动器中不执行第二纠错，所以存储单元的容量降低，软盘驱动器中的存储器可以比常规软盘驱动器的存储器小得多，并且软盘的成本 驱动可以减少。 此外，由于在软盘驱动器中不执行二次校正，因此可以实现从软盘驱动器到计算机的数据传输速率的增加。

公开(公告)号：US5925088A

公开(公告)日：1999-07-20

申请号：US591787

申请日：1996-01-25

申请人： Masahiro Nasu

发明人： Masahiro Nasu

IPC分类号： G01N27/409 ,  F02D41/14 ,  F02D45/00 ,  G01N27/406 ,  G01N27/41 ,  G06G7/70 ,  F02D41/00 ,  G01N7/00

CPC分类号： F02D41/1495 ,  F02D41/1456 ,  G01N27/4065

摘要： An air-fuel ratio detecting device and a method capable of correctly and very precisely detecting the air-fuel ratio of an internal combustion engine. The air-fuel ratio detecting device comprises an air-fuel ratio sensor disposed in the exhaust system of an internal combustion engine, an air-fuel ratio sensor circuit which applies a voltage to the air-fuel ratio sensor, detects the current through the air-fuel ratio sensor and produces an output that varies in proportion to the magnitude of the current that is detected, and a storage means for storing the data of a conversion map which is used for calculating the air-fuel ratio of the internal combustion engine in response to the output of the air-fuel ratio sensor circuit. The air-fuel ratio detecting device further comprises a circuit error detection means for detecting an error in the output caused by the air-fuel ratio sensor circuit, and a map calibration means for calibrating the data of the conversion map stored in the storage means based upon the error in the output detected by the circuit error detection means.

摘要翻译： 一种能够正确且非常精确地检测内燃机的空燃比的空燃比检测装置和方法。 空燃比检测装置包括设置在内燃机的排气系统中的空燃比传感器，向空燃比传感器施加电压的空燃比传感器电路，检测通过空气的电流 - 燃料比传感器，并且产生与检测到的电流的大小成比例地变化的输出;以及存储装置，用于存储用于计算内燃机的空燃比的转换图的数据 响应于空燃比传感器电路的输出。 空燃比检测装置还包括：电路错误检测装置，用于检测由空燃比传感器电路引起的输出误差;以及映射校准装置，用于校准存储在存储装置中的转换图的数据 在由电路错误检测装置检测到的输出中的错误。

公开(公告)号：US4805047A

公开(公告)日：1989-02-14

申请号：US879272

申请日：1986-06-27

申请人： Masahiro Nasu ,  Kiyoto Abe

发明人： Masahiro Nasu ,  Kiyoto Abe

IPC分类号： G11B5/09 ,  G11B5/012 ,  G11B20/10

CPC分类号： G11B5/012 ,  G11B20/10009

摘要： A magnetic recording and reproducing apparatus wherein mechanical deteriorations and induced noises can be eliminated and detection signals different in recording density can be read by a reading circuit without a misoperation. The apparatus comprises a filter circuit including a switching element for changing over between different impedance elements in order to allow reproduction from a magnetic medium which is recorded in a recording period which is different from recording and reproducing characteristics of said magnetic head. Preferably, the switching element is a field effect transistor.

摘要翻译： 可以消除机械劣化和感应噪声的磁记录和再现装置，并且可以通过读取电路读取记录密度不同的检测信号，而不会误操作。 该装置包括一个滤波电路，该滤波电路包括用于在不同阻抗元件之间切换的开关元件，以便允许从与所述磁头的记录和再现特性不同的记录周期中记录的磁介质再现。 优选地，开关元件是场效应晶体管。

公开(公告)号：US5475975A

公开(公告)日：1995-12-19

申请号：US305641

申请日：1994-09-14

申请人： Masahiro Nasu

发明人： Masahiro Nasu

IPC分类号： F02D45/00 ,  F02D41/14 ,  F01N3/20

CPC分类号： F02D41/1441

摘要： The air-fuel ratio control device according to the present invention controls the air-fuel ratio of the engine in accordance with the output of the air-fuel ratio sensor disposed on the exhaust gas passage upstream of the three-way reducing and oxidizing catalyst. Further, to compensate for the change in the output characteristics of the upstream air-fuel ratio sensor, the output of the upstream air-fuel ratio sensor is corrected in accordance with the output of another air-fuel ratio sensor disposed on the exhaust gas passage downstream of the catalyst. Since the response of the downstream air-fuel ratio sensor is delayed due to the O.sub.2 storage capacity of the catalyst, the air-fuel ratio control device in the present invention predicts the future value, by a specified time, of the output of the downstream air-fuel ratio sensor based on the history of the change in the output of the upstream air-fuel ratio sensor and the present output of the downstream air-fuel ratio sensor. Since the output of the upstream air-fuel ratio sensor is corrected based on the predicted output of the downstream air-fuel ratio sensor, precise air-fuel ratio control can be achieved by eliminating the delay in the response of the downstream air-fuel ratio sensor caused by the O.sub.2 storage capacity of the catalyst.

摘要翻译： 根据本发明的空燃比控制装置根据设置在三通还原和氧化催化剂上游的废气通道上的空燃比传感器的输出来控制发动机的空燃比。 此外，为了补偿上游空燃比传感器的输出特性的变化，上游空燃比传感器的输出根据设置在排气通道上的另一空燃比传感器的输出被校正 催化剂下游。 由于下游空燃比传感器的响应由于催化剂的O 2存储容量而延迟，所以本发明的空燃比控制装置将规定时间的未来值预测下游的空气燃料比传感器的输出 基于上游空燃比传感器的输出变化和下游空燃比传感器的当前输出的历史的空燃比传感器。 由于基于下游空燃比传感器的预测输出来校正上游空燃比传感器的输出，所以可以通过消除下游空燃比传感器的响应延迟来实现精确的空燃比控制 传感器由催化剂的O2储存能力引起。

公开(公告)号：US06560051B1

公开(公告)日：2003-05-06

申请号：US09512000

申请日：2000-02-24

申请人： Masahiro Nasu ,  Kyoichi Shirane

发明人： Masahiro Nasu ,  Kyoichi Shirane

IPC分类号： G11B500

CPC分类号： G11B19/02 ,  G11B5/012 ,  G11B5/09

摘要： A disk device having access to a disk in different writing modes includes a host PC. The host PC sends a command including a data transfer rate to a controller (disk drive). When the command designating the data transfer rate is received, the writing mode employed for writing data to a disk is automatically switched. The host PC already has the transfer rate to be sent. It is unnecessary to newly prepare a special command to notify the controller in order for switching between the writing modes. Therefore, versatility will not be impaired.

摘要翻译： 具有以不同写入模式访问磁盘的磁盘设备包括主机PC。 主机PC向控制器（磁盘驱动器）发送包括数据传输速率的命令。 当接收到指定数据传输速率的命令时，自动切换用于将数据写入盘的写入模式。 主机PC已经具有要发送的传输速率。 为了在写入模式之间进行切换，不需要重新准备特殊命令来通知控制器。 因此，多功能性不会受到损害。

公开(公告)号：US4882639A

公开(公告)日：1989-11-21

申请号：US274685

申请日：1988-11-22

申请人： Masahiro Nasu ,  Kiyoto Abe

发明人： Masahiro Nasu ,  Kiyoto Abe

IPC分类号： G11B5/016 ,  G11B5/09 ,  G11B19/02 ,  G11B20/10

CPC分类号： G11B20/10 ,  G11B19/02 ,  G11B5/016 ,  G11B5/09

摘要： A magnetic recording and reproducing apparatus which can write magnetic information in different recording periods so that information stored in a magnetic medium can be modified or corrected therewith in whichever recording period it is recorded. The apparatus comprises a bias change-over circuit for changing over the voltage to be applied to a magnetic head to effect recording in a recording period which is different from recording and reproducing characteristics of the magnetic head, and a writing circuit for supplying a writing current to the magnetic head in response to a voltage from the bias change-over circuit. Thus, by changing over the writing current, a recording period for recording on the magnetic medium can be modified.

摘要翻译： 一种磁记录和再现装置，其可以在不同的记录周期中写入磁信息，从而可以在其记录的哪个记录周期内修改或校正存储在磁介质中的信息。 该装置包括用于改变施加到磁头的电压以在与磁头的记录和再现特性不同的记录周期中进行记录的偏置转换电路，以及用于提供写入电流的写入电路 响应于来自偏置转换电路的电压到磁头。 因此，通过改变写入电流，可以改变用于在磁性介质上记录的记录周期。