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1. 发明专利

JP2001155592A GAS ISOLATED SWITCHGEAR 失效
公开(公告)号：JP2001155592A
公开(公告)日：2001-06-08
申请号：JP33829399
申请日：1999-11-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIO KAZUYOSHI
IPC分类号： H02B13/065 , H01H33/26 , H01H33/59 , H02G5/06
摘要： PROBLEM TO BE SOLVED: To control action of a breaker by detecting the quantity of a decomposed gas. SOLUTION: After a circuit is cut by a breaker 17, circuit reclosing action of the breaker 17 is delayed by a predetermined period when the quantity of a decomposed gas detected by a gas detecting means near a breaking part 17a in the breaker 17 is more than predetermined, and circuit reclosing action of the breaker 17 is conducted according to the directions of permission signal of circuit reclosing to a switch control means 18 when the quantity of the decomposed gas lowers to the predetermined value or less.

2. 发明专利

JPH0757280A OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE 失效
公开(公告)号：JPH0757280A
公开(公告)日：1995-03-03
申请号：JP20067893
申请日：1993-08-12
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIO KAZUYOSHI
IPC分类号： G11B7/09
摘要： PURPOSE:To provide an optical information recording/reproducing device gaining an analog regenerative signal with a stable amplitude without mistaking the data reproduction even when the analog regenerative signal is attenuated due to the disturbance, etc., of a servo system, reducing an error in the conversion to a digital signal and improving the reliability of the data reproduction. CONSTITUTION:This device is provided with an error information circuit 40 using a servo error signal showing a focal position displacement of a laser beam spot 21 and generating error information and an amplification degree setting circuit 41 setting an amplification degree of the analog regenerative signal in a data system amplifier 37 based on the error information. By the amplification degree setting circuit 41, the more the error information is large the more the amplification degree of the analog regenerative signal is controlled large.

3. 发明专利

JPS5450855A SWITCH CONTROLLER 失效
公开(公告)号：JPS5450855A
公开(公告)日：1979-04-21
申请号：JP11703677
申请日：1977-09-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIO KAZUYOSHI
IPC分类号： H02H9/04 , H01H9/54 , H02H3/347 , H02H7/22
摘要： PURPOSE:To prevent electrical parts from being destroyed by grounding the common ground terminal of a control circuit when the opening and closing of a switch is controlled using the control circuit connected through a control cable. CONSTITUTION:The main switch 1 in which a circuit breaker, zero-phase current transformer, etc. and the control box 2 having a groued relay 7 and a heat collection trip circuit 8 are connected by a control cable 3 and P2 as both common earth and control power ground terminal of a control circuit is connected to the ground terminal E0 of the control box 2 through a surge absorption capacitor 16. Thus, the conversion surge owing to the abnormal voltage generated in the high voltage circuit on the load section 10 is led to the earth via the common ground terminal P2 and prevents P2 from reaching high potential. As a result, the dielectric breakdown of the electrical parts in the control circuit can be prevented by simple structure.

4. 发明专利

JP2002118912A GAS-INSULATED ELECTRIC APPARATUS AND ANOMALY DETECTING METHOD THEREIN 失效
公开(公告)号：JP2002118912A
公开(公告)日：2002-04-19
申请号：JP2000310242
申请日：2000-10-11
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIO KAZUYOSHI
IPC分类号： G01R31/12 , G01R31/08 , H01H33/56 , H02B13/065 , H02G5/06
摘要： PROBLEM TO BE SOLVED: To solve the problem of poor maintainability in gas-insulated electrical apparatuses that, even if an anomaly, such as discharging, occuring in a gas- insulated electrical apparatus, where the discharging takes place or how and by what the discharging is caused is unknown, through the existence of the anomaly is perceived, until the apparatus is dismantled and checked, and thus replacement parts must be procured after the dismantlement. SOLUTION: Discharge sensors 22a to 22d, that detect electromagnetic waves arising from partial discharge (discharge) 25, together with the time of the arrival thereof, are installed. From the difference in time of detection of detection signals from the discharge sensors 22a to 22b, a fault location determining circuit 30 calculates the location of the discharge 25. Also, it can be determined whether the part at the location determined by the calculation is an insulated part or a metal part, based on the previously stored three-dimensional position information on the interior of the gas-insulated electrical apparatus.

5. 发明专利

JP2001186613A GAS-INSULATED ELECTRICAL MACHINERY AND APPARATUS 失效
公开(公告)号：JP2001186613A
公开(公告)日：2001-07-06
申请号：JP37252299
申请日：1999-12-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIO KAZUYOSHI
IPC分类号： H02B13/055 , H01H33/56 , H02B13/025 , H02G5/06
摘要： PROBLEM TO BE SOLVED: To solve a problem, associated with gas-insulated electrical machinery and apparatus provided with a conventional gas sensor, that the output level is lowered due to aging of a gas sensor and a gas sensor installed for an extended period of time can overlook any anomaly occurring in a gas section. SOLUTION: Mean value and standard deviation are periodically calculated from the outputs of gas sensors 6a, 6b, 6c, and 6d respectively installed in a plurality of gas sections 1a, 1b, 1c, and 1d filled with insulating gas for insulating a housed central conductor 4, using a signal processor 16. Criteria for acceptance/rejection are established based thereon, and the outputs of the gas sensors 6a, 6b, 6c, and 6d are judged against the periodically established criteria for acceptance/rejection. As a result, any anomaly in the gas section 1a, 1b, 1c, and 1d is detected with the influences of aging of the gas sensors eliminated.

6. 发明专利

JPH07121988A INFORMATION RECORDER/REPRODUCER 失效
公开(公告)号：JPH07121988A
公开(公告)日：1995-05-12
申请号：JP27049493
申请日：1993-10-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIO KAZUYOSHI
IPC分类号： G11B20/10 , G11B7/00 , G11B7/004
摘要： PURPOSE:To obtain an information recorder/reproducer in which long period reliability of a medium for recording/reproducing data can be improved by prolonging a life in actual use of an information recording/reproducing medium. CONSTITUTION:The information recorder/reproducer comprises, in order to decide a life of a medium, a reproducing analog signal measuring circuit 36 for measuring a DC level of a reproducing signal of an amplitude or a non- recorded part of the reproducing signal, a gate circuit 37 for gating the amplitude or the level of the reproducing signal to limit it to a predetermined part of an add-on area, and an alarm unit 38 for informing, when a life of an optical disk is wasted, it to a user of the recorder/reproducer.

7. 发明专利

JPS63204563A DATA RECORDING ERROR DETECTOR FOR OPTICAL DISK DEVICE 失效
公开(公告)号：JPS63204563A
公开(公告)日：1988-08-24
申请号：JP3569087
申请日：1987-02-20
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIO KAZUYOSHI
IPC分类号： G11B20/18 , G11B20/10
摘要： PURPOSE:To inexpensively and surely execute verifying reading and to improve the reliability of recording data by providing the titled device with an allowable phase difference setting circuit for detecting that a phase difference exceeds a prescribed allowable value and rewriting the recording data in a replacing sector based on an output signal from the circuit. CONSTITUTION:The titled device is provided with an automatic phase control circuit 10A for reproducing a clock signal synchronizing with a recording data signal obtained from a recording medium 9 and the allowable phase difference setting circuit 18 for detecting that a signal phase difference outputted from a phase detector 12 in the circuit 10A exceeds the allowable value. When the circuit 18 detects that the phase difference between a reproduced clock signal outputted from a voltage control oscillator 11 and an input data signal exceeds a prescribed set value at the time of verifying reading, i.e. when the recorded data are in error, the circuit 18 actuates a replacing sector signal generator 17 to record data again in a replacing sector.

8. 发明专利

JPS6233370A DATA RECORDING ERROR DETECTOR FOR OPTICAL DISC 失效
公开(公告)号：JPS6233370A
公开(公告)日：1987-02-13
申请号：JP17459885
申请日：1985-08-06
申请人： MITSUBISHI ELECTRIC CORP
发明人： FURUKAWA TERUO , FUJIO KAZUYOSHI , OZAKI MINORU
IPC分类号： G11B20/10 , G11B20/18
摘要： PURPOSE:To prevent generation of an abnormal clock by providing an error detection and correction means for detecting and correcting an error of a recording signal and a means for switching a range keeping synchronization with the recording signal of an automatic phase control circuit depending on the verified read time and the normal reproduction time. CONSTITUTION:When the response speed is fast, the titled device is sensitive to external noises and causes easily an abnormal clock. In increasing the natural frequency at the verify read time more than that at the normal reproduction time, the abnormal clock at the normal reproduction is prevented. Further, the inherent frequency is increased, then the synchronization keeping range is widened. Thus, a switch 22 in an automatic phase control circuit 17 is changed over to be connected to a capacitor C2 at the reproduction or a switch 23 is clanged over to the position of a resistor R4, then the range of keeping the inherent frequency and the synchronization is widened and the circuit 17 is more sensitive to noise due to decentering an optical disc 8 or noise due to aging deterioration of the optical disc 8 than that at the normal reproduction. Thus, the abnormal clock is prevented and the probability of mis-reproduction is minimized.

9. 发明专利

JPH02137169A SIGNAL PROCESSING CIRCUIT 失效
公开(公告)号：JPH02137169A
公开(公告)日：1990-05-25
申请号：JP28893288
申请日：1988-11-17
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIO KAZUYOSHI , FURUKAWA TERUO
IPC分类号： G11B20/10
摘要： PURPOSE:To reproduce the data of high reliability by providing an automatic gain control (AGC) amplifier to fix the header part signal amplitude of an analog reproducing signal and an AGC control circuit to generate a signal for the operation and unoperation of the AGC amplifier. CONSTITUTION:A reproducing signal is inputted from a recording medium to a filter circuit 1 and a noise frequency component excepting for a necessary band is removed. An output signal 1a of this filter circuit 1 is inputted to a first step amplifier 2 in a next step and adjusted do the amplitude in a rated range here. Only when the reproducing signal amplitude of a header part to be a subject, for which the AGC is executed, is in the rate a range, an AGC amplifier 4A executes the AGC operation and when the amplitude is out of the range, the AGC operation is not executed but a gain is fixed to a suitable fixed value. Thus, even when the reproducing signal amplitude of the header part is abnormal, the abnormal amplitude of the AGC amplifier 4A is not executed but the signal detection of an add-on data part can be normally executed. Thus, the data of the high reliability can be reproduced.

10. 发明专利

JPS6432470A SIGNAL DETECTING CIRCUIT 失效
公开(公告)号：JPS6432470A
公开(公告)日：1989-02-02
申请号：JP18937087
申请日：1987-07-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： FUJIO KAZUYOSHI , FURUKAWA TERUO
IPC分类号： G11B5/09 , G11B20/10
摘要： PURPOSE:To improve the reliability of a signal detecting circuit by signal- detecting only a true waveform peak of an analog reproducing signal being an information point, and eliminating completely a pseudo pulse. CONSTITUTION:In the vicinity of a true waveform peak of an analog reproducing signal being an information point, a pulse of prescribed width is generated by a clamping circuit 5, a level detecting circuit 6 and a pulse generating circuit 7. Subsequently, AND by an AND gate 8, of this pulse and a peak detecting pulse from a peak detecting circuit 4 is outputted as an information detecting signal. Accordingly, in the AND gate 8, a pseudo pulse by a noise which is contained in the analog reproducing signal is eliminated completely, and it does not occur to signal-detect the pseudo pulse as an information point by mistake. In such a way, the reliability of a signal detecting circuit can be improved.

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