JPS6472628A - Security radio communication system equipment - Google Patents

Security radio communication system equipment

Info

Publication number
JPS6472628A
JPS6472628A JP62228519A JP22851987A JPS6472628A JP S6472628 A JPS6472628 A JP S6472628A JP 62228519 A JP62228519 A JP 62228519A JP 22851987 A JP22851987 A JP 22851987A JP S6472628 A JPS6472628 A JP S6472628A
Authority
JP
Japan
Prior art keywords
antennas
electric field
radio equipment
transponder radio
communication system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62228519A
Other languages
Japanese (ja)
Inventor
Shigeru Kima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP62228519A priority Critical patent/JPS6472628A/en
Publication of JPS6472628A publication Critical patent/JPS6472628A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To increase the frequency receiving a strong electric field by providing two antennas to a transponder radio equipment and switching the antennas. CONSTITUTION:Antennas 6a, 6b are switched at a time interval such as a time interval a little longer than an abnormality alarming data length of a transponder radio equipment terminal 1 after the end of confirming test automatically. Thus, the alarming data from the transponder radio equipment 1 is received by an antenna with a stronger electric field in the antennas 6a, 6b. Then the received signal is given to a central management center from a controller 2 through a wired line and the abnormality is informed. Thus, the frequency of receiving a strong electric field of the transponder radio equipment is increased even with the fluctuation of the electric field.
JP62228519A 1987-09-14 1987-09-14 Security radio communication system equipment Pending JPS6472628A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62228519A JPS6472628A (en) 1987-09-14 1987-09-14 Security radio communication system equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62228519A JPS6472628A (en) 1987-09-14 1987-09-14 Security radio communication system equipment

Publications (1)

Publication Number Publication Date
JPS6472628A true JPS6472628A (en) 1989-03-17

Family

ID=16877695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62228519A Pending JPS6472628A (en) 1987-09-14 1987-09-14 Security radio communication system equipment

Country Status (1)

Country Link
JP (1) JPS6472628A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0455841U (en) * 1990-09-14 1992-05-13
GB2348085B (en) * 1999-01-20 2003-04-09 Ibm Personal area network (pan) communication
JP2008092139A (en) * 2006-09-29 2008-04-17 Sony Corp System and apparatus for wireless communication

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0455841U (en) * 1990-09-14 1992-05-13
GB2348085B (en) * 1999-01-20 2003-04-09 Ibm Personal area network (pan) communication
JP2008092139A (en) * 2006-09-29 2008-04-17 Sony Corp System and apparatus for wireless communication

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