JPS6458084A - Security system - Google Patents

Security system

Info

Publication number
JPS6458084A
JPS6458084A JP21463887A JP21463887A JPS6458084A JP S6458084 A JPS6458084 A JP S6458084A JP 21463887 A JP21463887 A JP 21463887A JP 21463887 A JP21463887 A JP 21463887A JP S6458084 A JPS6458084 A JP S6458084A
Authority
JP
Japan
Prior art keywords
code
radio waves
installation
repeating
transmitter
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
JP21463887A
Other languages
Japanese (ja)
Inventor
Ichiro Saito
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP21463887A priority Critical patent/JPS6458084A/en
Publication of JPS6458084A publication Critical patent/JPS6458084A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fire Alarms (AREA)

Abstract

PURPOSE:To extremely extend a service area in a security system by setting a radio wave repeating installation within a range of the radio waves of a transmitter and also setting a receiver within a range of the radio waves of the repeating installation. CONSTITUTION:The radio waves of a transmitter 1 are sent to the reception side via a repeating installation 10. In this case, the installation 10 selects and transmits only the radio waves of the transmitter 10. In the installation 10 a code signal sampling circuit 12 inputs data ID1-IDn to a controller 14 when a receiver 11 demodulates the radio waves of the transmitter 1. A repeating code corresponding to a house code is set at a code setting device 13 and a data reading means 21 reads the data ID1 having a house code equal to the repeating code and stores it into a memory means 22. Then the data ID2 is read and stored in the means 22. A deciding means 23 compares those codes stored in the means 22 with each other and select and repeats the code having the coincidence between its house code and information code.
JP21463887A 1987-08-28 1987-08-28 Security system Pending JPS6458084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21463887A JPS6458084A (en) 1987-08-28 1987-08-28 Security system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21463887A JPS6458084A (en) 1987-08-28 1987-08-28 Security system

Publications (1)

Publication Number Publication Date
JPS6458084A true JPS6458084A (en) 1989-03-06

Family

ID=16659062

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21463887A Pending JPS6458084A (en) 1987-08-28 1987-08-28 Security system

Country Status (1)

Country Link
JP (1) JPS6458084A (en)

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