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41. 发明专利

JPH11102286A CIRCUIT AND METHOD FOR DIVISION 失效
公开(公告)号：JPH11102286A
公开(公告)日：1999-04-13
申请号：JP15814398
申请日：1998-06-05
申请人： HITACHI LTD , HITACHI ULSI SYS CO LTD
发明人： KAWASAKI SHUNPEI , TAWARA YASUHIRO , FUKADA KAORU , YAMAZAKI TAKANAGA , SAKAKIBARA EIJI , KURAKAZU KEIICHI , AKAO YASUSHI , BABA SHIRO , KIHARA TOSHIMASA , KASHIWAGI YUUGO , FUJITA HIDEYA , ISHIDA KATSUHIKO , SAWA NORIKO , ASANO YOICHI , CHAGI HIDEAKI , SUGAWARA MASAHIKO , UMINAGA MASAHIRO , NOGUCHI YOSHIKI , WATABE MITSURU , TSUKAMOTO TAKU , MASUMURA SHIGEKI
IPC分类号： G06F7/537 , G06F7/52 , G06F7/535 , G06F9/30 , G06F9/305 , G06F9/32 , G06F9/38
摘要： PROBLEM TO BE SOLVED: To provide a circuit and a method for division with which a correct quotient can be easily found without detecting whether the partial remainder is '0' or not for each step of division for finding the quotient bit even when a dividend is negative. SOLUTION: When a dividend X is negative in the coded division expressed as Y (quotient) = X (dividend) ÷ 3 (divisor), for example, preprocessing is performed to define a value (X-1) subtracting '1' from the dividend X as a dividend. The preprocessing is processing for conceptionally shifting the coordinate axis of the quotient Y to left for '1'. The processing of division is performed in the shifting state. Thus, it is not necessary to discriminate whether the partial remainder is '0' or not conventionally every time in the middle of arithmetic processing and a hardware for that discrimination is unnecessitated as well. When finding the exact remainder, the found remainder is finally corrected.

42. 发明专利

JPH1196000A CPU AND MICROCOMPUTER 失效
公开(公告)号：JPH1196000A
公开(公告)日：1999-04-09
申请号：JP15814298
申请日：1998-06-05
申请人： HITACHI LTD , HITACHI ULSI SYS CO LTD
发明人： KAWASAKI SHUNPEI , TAWARA YASUHIRO , FUKADA KAORU , YAMAZAKI TAKANAGA , SAKAKIBARA EIJI , KURAKAZU KEIICHI , AKAO YASUSHI , BABA SHIRO , KIHARA TOSHIMASA , KASHIWAGI YUUGO , FUJITA HIDEYA , ISHIDA KATSUHIKO , SAWA NORIKO , ASANO YOICHI , CHAGI HIDEAKI , SUGAWARA MASAHIKO , UMINAGA MASAHIRO , NOGUCHI YOSHIKI , WATABE MITSURU , TSUKAMOTO TAKU , MASUMURA SHIGEKI
IPC分类号： G06F9/30 , G06F9/35
摘要： PROBLEM TO BE SOLVED: To prevent the utilization of immediate data or the designation of an absolute address from being limited even when the number of bits of a fixed length instruction format is less than the data word length, by adopting the fixed length instruction format having bits less than the maximum data word length supplied to an instruction executing means. SOLUTION: IRH and IRL are the instruction buffers of 16 bits respectively, and an instruction is transferred through an internal data bus for the unit of 32 bits while being stored one by one. These instructions are loaded through a multiplexer MPX to an instruction register IR1. The instruction register IR1 has 16 bits. Thus, since the fixed length instruction format of 16 bits is adopted for the data word length of 32 bits, the judgement on where an instruction border exists, can be grasped before the completion of the preceding instruction, and the advantage of the simplification of instruction decode processing or the like is guaranteed. Further, the useless arrangement of bits is decreased and the utilization efficiency of a program memory is improved.

43. 发明专利

JPH1077925A FUEL INJECTION DEVICE AND ITS METHOD 失效
公开(公告)号：JPH1077925A
公开(公告)日：1998-03-24
申请号：JP23385396
申请日：1996-09-04
申请人： HITACHI LTD
发明人： OBO SHIGERU , KATAYAMA HIROSHI , WATABE MITSURU
IPC分类号： F02M51/00 , F02D41/20 , F02M51/06 , H01F7/18
摘要： PROBLEM TO BE SOLVED: To obtain rapid valve opening responsiveness by making a current flow to an inductor prior to injector valve opening, previously accumulating electromagnetic energy in an injector magnetic circuit, and forming a series circuit of the inductor and an injector magnetic coil at the time of injector valve opening so as to make the same current flow by a switching element. SOLUTION: Prior to fuel injection, a transistor switch 600 is switched on by an inductor current control signal, and a current flows to an inductor 200. At this time, a switch 610 is still in an off state, so that a current is not flowing to an injector electromagnetic coil 300. The instant a fuel injection control signal instructs injection, the switch 600 is switched off, and the switch 610 rapidly changes into an on state. At this time, an inductor current is suddenly lowered the instant the switch 600 is switched off, and then shifted at a time constant determined by a series circuit of the inductor 200 and injector electromagnetic coil 300, and the inductor current continuously flows through the injector electromagnetic circuit 300.

44. 发明专利

JPH0836416A DIAGNOSIS METHOD FOR DISTRIBUTED CONTROLLER 失效
公开(公告)号：JPH0836416A
公开(公告)日：1996-02-06
申请号：JP17227094
申请日：1994-07-25
申请人： HITACHI LTD
发明人： KASAHARA TAKAYASU , WATABE MITSURU , YAMAOKA HIROMASA , SHIBATA KATSUNARI , MATSUBARA KIYOSHI , FUNABASHI SEIJU , MOROOKA YASUO
IPC分类号： G05B23/02
摘要： PURPOSE:To prevent the occurrence or a communication neck due to output of many abnormality information from individual distributed control controllers and to identify the cause of abnormality. CONSTITUTION:This method consists of a communication medium 1-2 which transmits information of each distributed control controller 1-3, a network monitor 1-1 which monitors, stores, edits, and processes transmitted information of the communication medium 1-2, and an input/output information filter attached to the distributed control controller 1-3. Each distributed control controller 1-3 sends abnormality information to the input/output filter at the time of the occurrence of a fault. The input/output filter refers to history information stored in the distributed control controller 1-3 to discriminate whether abnormality information including the transmitted taunt information is already transmitted to the communication medium 1-2 or not; and if it is not transmitted to the communication medium yet, abnormality information is transmitted to a network. Thus, redundant abnormality information is prevented from being transmitted to the network.

45. 发明专利

JPH0822308A AUTOMOBILE CONTROLLER 失效
公开(公告)号：JPH0822308A
公开(公告)日：1996-01-23
申请号：JP15699294
申请日：1994-07-08
申请人： HITACHI LTD , HITACHI CAR ENGINEERING KK
发明人： KAYANO MITSUO , KATAYAMA HIROSHI , WATABE MITSURU , ISHII JUNICHI , ICHIHASHI TETSUYA , SASAKI SHOJI
IPC分类号： B60R16/02 , B60R16/03 , G05B15/02
摘要： PURPOSE:To reduce the size of a control unit by switching circuits corresponding to a multiplexer and a sensor signal and changing circuits which match the sensor signal through software according to the sensor signal. CONSTITUTION:The sensor signal of a sensor 1 which outputs a signal showing the state of an automobile is inputted to a surge-proof circuit incorporated multiplexer 3 in the automobile control unit 2 and a selected signal is inputted to a programmable input signal matching module 5 incorporated in an I/O LSI 4 and matched; and control contents are determined by the I/O LSI 4 or a microcomputer 6 connected to the I/O LSI 4 and an actuator 7 for injection, etc., is controlled. The sensor signal inputted to the surge-proof circuit incorporated multiplexer 3 at this time is selected with the output signal from the I/O LSI 4, and a programmable input signal switching circuit in the programmable input signal matching in the I/O LS 14 is also switched in synchronism with the switching timing of the selection.

46. 发明专利

JPH0749767A OPERATION PROCESSOR PROVIDED WITH SATURATION PROCESSING FUNCTION 失效
公开(公告)号：JPH0749767A
公开(公告)日：1995-02-21
申请号：JP19455493
申请日：1993-08-05
申请人： HITACHI LTD
发明人： MINAMI TOSHIKA , WATABE MITSURU
IPC分类号： G06F7/38 , G06F7/507
摘要： PURPOSE:To reduce the number of program steps related to saturation processing by discriminating whether the result obtained by addition/subtraction of two input values based on a control signal exceeds a preliminarily determined value or not by operation and selecting the operation result and one of set values as the final operation results based on this operation result information. CONSTITUTION:A multiplexer 106 selectively outputs the operation result outputted from a computing element 104 and the positive upper limit value or the negative upper limit value outputted from a constant generator 105 based on operation result information 107 outputted from the computing element 104. Overflow information is inputted as an OR flag 110 to a control circuit 108, and sign information is inputted as an N flag 116 to the control circuit 108. The control circuit 108 reads out an instruction from a ROM and controls a CPU 111 to perform the data read/write of a register file 100, the control of operation of the computing element 104, the control of operation of the multiplexer 106, etc., thus executing an arithmetic processing program.

47. 发明专利

JPH06250869A DISTRIBUTED CONTROL SYSTEM 失效
公开(公告)号：JPH06250869A
公开(公告)日：1994-09-09
申请号：JP3964393
申请日：1993-03-01
申请人： HITACHI LTD
发明人： WATABE MITSURU , YAMAOKA HIROMASA
IPC分类号： G05B9/03 , G05B19/042 , G06F9/46 , G06F9/50 , G06F11/20 , G06F15/16 , G06F15/177 , H04L12/28
摘要： PURPOSE:To autonomously divide/distribute the load of a failed controller so as to backup the failed controller by storing the loads of controllers and distrib uting and dividing the load of the failed controller in accordance with its load. CONSTITUTION:Plural controllers 1 to 4 connected to a sensor and a controlled object in a plant 100 to control them are mutually connected through a network 1000 to constitute a distributed control system. A disconnecting means 6180 detects a down state such as an failure of a hardware in the controller and the runaway of software and stops the operation of the downed microcomputer. When the inside down of the controller is informed from the means 6180, an internal backup means 6170 distributes and allocates the load of the failed controller in accordance with the loads of the controllers other than the failed controller based upon an execution allotment table. Consequently autonomous backup can be executed without preparing a controller for centralized control or backup.

48. 发明专利

JPH04121085A DIGITAL PULSE PROCESSOR 失效
公开(公告)号：JPH04121085A
公开(公告)日：1992-04-22
申请号：JP23974290
申请日：1990-09-10
申请人： HITACHI LTD
发明人： OBA MAMORU , WATABE MITSURU , ONOE TOSHIKA , OBARA SANSHIRO
IPC分类号： G01P3/489 , H02P29/00 , H02P29/20
摘要： PURPOSE:To make it possible to execute speed detecting operation through simple processing and to relieve burden on the software by providing a mode control circuit for commanding separation/coupling of counters and a control circuit for separating/coupling the counter based on the command. CONSTITUTION:PREGOA 110 and PREGOB 111 are 16 bits counters for actually counting a count-up or count-down signal processed at a pulse preprocessing section 109, and pulses inputted to the input terminals PEOA 103, PEOB 104 of channel 0 are counted. Counters are coupled based on information designated at MCREG 129. PREG1A 112 and PREG1B 113 or PREG2A and PREG2B are also provided with same function as that of the PREGOA 110 and PREGOB 111 and correspond to the input terminals PE1A 105, PE1B 106 of channel 1 and PE2A 107, PE2B 108 of channel 2.

49. 发明专利

JPH03228102A PULSE SIGNAL GENERATOR, MICROCOMPUTER AND ASSOCIATED MEMORY 失效
公开(公告)号：JPH03228102A
公开(公告)日：1991-10-09
申请号：JP2345590
申请日：1990-02-01
申请人： HITACHI LTD
发明人： WATABE MITSURU , OBARA SANSHIRO , ONOE TOSHIKA , MORINAGA SHIGEKI
IPC分类号： G05B11/26 , G05B15/02 , G06F1/04 , H02P27/08
摘要： PURPOSE:To prevent error from being generated by the change of a pulse period by copying the contents of a master memory to a slave memory according to a synchronizing signal showing the value of an interval timer becomes the final value. CONSTITUTION:An interval timer 120 changes an interval timer value T in the shape of a saw-teeth or triangular wave as the carrier of PWM (pulse Width Modulation) and outputs a synchronizing signal S12 showing the end for each timer period being the time when the interval timer value T is made minimum. Each time the synchronizing signal S12 is generated prescribed times, a copy permission circuit 130 generates a copy signal S13 and at a parallel comparison type associated memory 140, the contents of a master memory 141 are copied to a slave memory 142. Therefore, the output time is prevented from exceeding the interval timer value T before and after the copy, and the associated memory 140 can issue an output control command at the desired time. Thus, the error can be prevented from being generated in pulse width even when changing the pulse width of the pulse signal.

50. 发明专利

JPH02131389A SINUSOIDAL GENERATOR 失效
公开(公告)号：JPH02131389A
公开(公告)日：1990-05-21
申请号：JP27724488
申请日：1988-11-04
申请人： HITACHI LTD
发明人： ONOE TOSHIKA , SUGIURA YASUYUKI , WATABE MITSURU , MIYASHITA KUNIO
IPC分类号： H02P6/16 , H02P6/06 , H02P6/08
摘要： PURPOSE:To obtain continual sinusoidal waves and to reduce a sinusoidal wave ROM of U- and V-phases by adding U-phase, V-phase and W-phase signals, a U/V switching signal and a normal rotation/reverse rotation signal to the higher-order of an updown counter, and by extending the addresses of the sinusoidal wave ROM. CONSTITUTION:The address of a sinusoidal wave ROM 21 to output sinusoidal waves is extended to 13-bits by adding 8-bits of an updown counter 9 and more significantly a normal rotation/reverse rotation signal selecting 0.1 as a result of operation of a microcomputer, a U/V switching signal alternately fetching U-phase and V-phase data and U-phase, V-phase and W-phase signals deviated by 120 deg.C in phase. Continual sinusoidal waves can thereby be obtained and a U-phase and V-phase sinusoidal wave ROM reduced.

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