专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

JPH1042339A DEAD CHANNEL DETECTION DEVICE FOR MICRO CELLULAR SYSTEM 失效
公开(公告)号：JPH1042339A
公开(公告)日：1998-02-13
申请号：JP19057296
申请日：1996-07-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TERAJIMA MASANORI
IPC分类号： H04W16/14 , H04Q7/28 , H04Q7/22
摘要： PROBLEM TO BE SOLVED: To provide a dead channel detecting device in a MCS(micro cellular system) which can allocate a dead channel of a CMTS(cellular vehicle telephone system) in the region as its own control channel and speech communication channel according to its own decision. SOLUTION: This device is provided with a CCM(down control channel receiver) which contains receiving parts 31 that continuously receive an outgoing control channel of a CMTS, memory 33 that stores speech communication channel information included in the outgoing control channel and a control part 32 that detects a channel which is not allocated as a speech communication channel by the stored speech information channel information more than fixed times, the part 32 recognizes the detected channel as a dead channel of the CMTS in a MCS establishing area and feedbacks it to a CU(control unit) 4, and the CU 4 makes the dead channel as a speech communication or control channel of the MCS and allocates the speech communication or control channel to the dead channel.

12. 发明专利

JPH05110501A CHANNEL ASSIGNING METHOD IN MICROCELLULAR SYSTEM 失效
公开(公告)号：JPH05110501A
公开(公告)日：1993-04-30
申请号：JP27224691
申请日：1991-10-21
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMADA JUN , TERAJIMA MASANORI , OYAMA KENICHI , OMORI EIJI
IPC分类号： H04W16/12 , H04W16/14 , H04W16/24 , H04W16/32 , H04W24/00 , H04W28/16 , H04W72/04 , H04W84/04 , H04W88/06
摘要： PURPOSE:To automatically retrieve and assign a channel being free from a mutual interference, in a microcellular system operated in the same frequency band as a cellular system. CONSTITUTION:The microcellular system coexisting in a frequency band together with a cellular system is constituted of a controller 5, a base station 6, and a multi-channel switching receiver 7. In such a state, by the multi-channel switching receiver 7, a use state of a cellular channel in its band is monitored, a free channel group is detected, and it is assigned to the own system. On the other hand, whenever a communication request is generated, the base station 6 detects a channel which is not used in the own system, from in the free channel group, and assigns it to a communication.

13. 发明专利

JPH01265375A BIT INTEGRATING CIRCUIT 失效
公开(公告)号：JPH01265375A
公开(公告)日：1989-10-23
申请号：JP9414488
申请日：1988-04-15
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SHIMIZU SATOSHI , TERAJIMA MASANORI
IPC分类号： G06G7/186
摘要： PURPOSE:To lower the cut-off frequency of a low-pass filter (LPF) and at the same time to prevent the delay of rise of an integrating circuit at the time of application of a power supply by securing a series connection between a capacitor of the LPF and another capacitor after switching a switch at the arriving time of the electric field of reception. CONSTITUTION:The cut-off frequency of a LPF 18 for DC production is decided by the parallel capacity of capacitors 17 and 21 as well as a resistance 16 and set at a low level after an analog switch 20 is turned on. Thus the cut-off frequency of the LPF 18 set between an integrator 15 and a DC amplifier 19 has a low level at the time of reception. At the same time, waveform effect is reduced for a base band signal. While a capacitor 21 having large capacity is cut off when the switch 20 is turned off in a waiting state. When the switch 20 is turned on, the parallel capacity of the LPF 18 is quickly charged. Thus a bit integrating circuit can have a quick rise.

14. 发明专利

JP2002261677A VEHICLE MOUNTED COMMUNICATION APPARATUS 失效
公开(公告)号：JP2002261677A
公开(公告)日：2002-09-13
申请号：JP2001053079
申请日：2001-02-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKASE TORU , TERAJIMA MASANORI , INUI AKIHIRO
IPC分类号： G08G1/09 , H04B7/26
摘要： PROBLEM TO BE SOLVED: To provide a vehicle mounted communication apparatus for a DSRC system which is inexpensive and automatically supports modulation-demodulation scheme each for a half stop application and a fast speed run application. SOLUTION: Communication is executed between the half stop application and a road side apparatus via an antenna 1, a mixer 2, a selector switch SW, and a modem for a high-capacity transmission 3. On the other hand, communication is executed between the fast speed run application and the road side application via the antenna, mixer, selector switch, and a multipath resistant modem 4. The selector switch setting is changed by a vehicle speed detector 5 to the high-capacity transmission modem side when vehicle speed is below a predetermined one, and to the multipath resistant modem side when the vehicle speed is over the predetermined one.

15. 发明专利

JP2001068925A ROAD SIDE ANTENNA DEVICE 失效
公开(公告)号：JP2001068925A
公开(公告)日：2001-03-16
申请号：JP24021799
申请日：1999-08-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKEMOTO MAKOTO , HIRANO YOSHITERU , INUI AKIHIRO , TERAJIMA MASANORI
IPC分类号： G07B15/00 , G08G1/017 , H01Q17/00 , H04W4/04 , H04W64/00
摘要： PROBLEM TO BE SOLVED: To form a narrow communication area even when there is a structure at an upper front part of a road side antenna that is suitable for an automatic toll collection system. SOLUTION: The road side antenna system is provided with a road side antenna 5 that is installed on a road 3 to form a prescribed communication area 6 and a roof structure 11 that is installed at an upper front part of the road side antenna 5 and has a radio wave absorbing body 12 placed on the side of the road side antenna 5. Then, radio communication is conducted within the communication area between the road side antenna 5 and an on-vehicle device 2 mounted on a vehicle 1 traveling on the road.

16. 发明专利

JPH11187588A LITHIUM ION SECONDARY BATTERY CHARGING SYSTEM AND CHARGER 失效
公开(公告)号：JPH11187588A
公开(公告)日：1999-07-09
申请号：JP36499497
申请日：1997-12-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAKAMATA KOJI , TERAJIMA MASANORI
IPC分类号： H02J7/00 , H01M10/44 , H02J7/10
摘要： PROBLEM TO BE SOLVED: To efficiently and safely charge by suppressing a deterioration of a battery performance to a minimum limit, by controlling to charge according to a voltage of a battery cell in a battery pack containing a protective circuit. SOLUTION: A lithium ion secondary battery charging system comprises a cell voltage detector constituted as a differential amplifier of an amplification factor of '1' by an operational amplifier 13, and a charge controller 4 for monitoring a battery cell voltage and a charging current to control the charging voltage and the charging current. The controller 4 controls to charge by the voltage of the cell 1 without influence of a voltage drop of the circuit 2 in a battery pack P.

17. 发明专利

JPH06284462A FRAUDULENT USE PREVENTING METHOD FOR MICROCELLULAR SYSTEM 失效
公开(公告)号：JPH06284462A
公开(公告)日：1994-10-07
申请号：JP6866093
申请日：1993-03-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NAGAMATSU JUN , YAMADA JUN , TERAJIMA MASANORI
IPC分类号： H04B7/26 , H04W12/06 , H04W16/32 , H04W84/16 , H04Q7/04
摘要： PURPOSE:To prevent a microcellular system from being frudulently used beyond the management of a system manager, in a microcellular system coexists with a cellular system on a frequency band. CONSTITUTION:This system is equipped with a controller 3 connected with a telephone port to which the subscriber's telephone number of a public telephone communication network 1 is assigned, which executes the continuity and interruption of the operation of the system, and a maintenance console 8 which communicates with the controller 3 from a remote place through a public telephone communication network 1 and a private exchange switchboard 2. Then, the controller 3 is equipped with a time timer which can be set from the maintenance console 8, and the maintenance console 8 is equipped with a function which resets/restarts the timer. Then, when the timer is time out, the operation of the system is stopped.

18. 发明专利

JPH0322732A FAST CLOCK RECOVERING DEVICE 失效
公开(公告)号：JPH0322732A
公开(公告)日：1991-01-31
申请号：JP15783789
申请日：1989-06-20
申请人： MATSUSHITA ELECTRIC IND CO LTD , TOSHIBA CORP , FUJITSU LTD , MITSUBISHI ELECTRIC CORP
发明人： TERAJIMA MASANORI , TSUKUI YASUHIRO , HANAWA TETSUYA , TAKEGAKI HIROSHI
IPC分类号： H04L7/027 , H03L7/06 , H04L7/033
摘要： PURPOSE:To decrease the number of times of correction when a phase difference is large and to enable fast clock recovery by increasing correction width at the time of a reception startup. CONSTITUTION:A reception startup detection part 5 and a correction frequency counter 8 are provided. Then the reception startup detectio part 5 detects the reception startup and the correction frequency counter 8 counts the number of times of phase correction from the reception startup and decreases the phase correction width gradually with the counted value to attain to a constant phase difference speedily. Consequently, when the phase difference is large at the time of the reception startup, a clock signal synchronized with a zero-cross signal can be regenerated in high speed.

19. 发明专利

JPH033454A METHOD FOR QUICK RECEPTION RISE 失效
公开(公告)号：JPH033454A
公开(公告)日：1991-01-09
申请号：JP13607889
申请日：1989-05-31
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TERAJIMA MASANORI
IPC分类号： H03K5/08 , H04L25/03 , H04L27/14 , H04L27/148
摘要： PURPOSE:To shorten the reception rise time by switching the time constant of AC coupling between a frequency discriminator and a base band part by an analog switch to faithfully discriminate continuous data of the same code. CONSTITUTION:At the time of reception rise, the time constant of AC coupling is determined by only a resistor 4 and a coupling capacitor 3 because an analog switch 6 is turned on, and the coupling capacitor 3 is quickly charged. When zerocrossing is detected in the output of a comparator 8 by a zero-crossing detector 10, the time constant of AC coupling is determined by the series value of resistors 4 and 5 and the coupling capacitor 3 because the analog switch 6 is turned off. Consequently, the cut-off frequency of a high-pass filter consisting of resistors 4 and 5 and the coupling capacitor 3 can be set to a sufficiently low value. Thus, the reception rise time is shortened because the time constant of AC coupling can be reduced at the time of rise, and even continuous data of the same code is satisfactorily discriminated because the low cut-off frequency is sufficiently reduced in the steady reception state.

20. 发明专利

JP2001023086A TRAVELING SPEED SUPPORTING SYSTEM AND ANTENNA DEVICE FOR THE SAME SYSTEM 失效
公开(公告)号：JP2001023086A
公开(公告)日：2001-01-26
申请号：JP19183799
申请日：1999-07-06
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HIRANO YOSHITERU , TERAJIMA MASANORI , INUI AKIHIRO , TAKEMOTO MAKOTO
IPC分类号： G09B29/10 , G08G1/052 , G08G1/09
摘要： PROBLEM TO BE SOLVED: To issue warning for urging speed control to a vehicle traveling at a higher speed than a limited speed. SOLUTION: Reflected waves 120 generated when transmission waves 100 transmitted from an antenna device 10 set at a gate 11 on a road are reflected on a traveling vehicle 12 are received by the antenna device 10 so that a Doppler signal shifted in proportion to the traveling speed of a traveling vehicle 12 can be detected, and the traveling speed of the traveling vehicle 12 can be calculated and measured. Then, warning for urging speed control is issued to the traveling vehicle 12 according to the measured result.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式