EP 0407776 A3 19910918 - RADIO TELEMETRY MONITORING SYSTEM
Title (en)
RADIO TELEMETRY MONITORING SYSTEM
Publication
Application
Priority
US 37993989 A 19890714
Abstract (en)
[origin: EP0407776A2] A system to monitor an electric fence or a secured area uses radio telemetry to report faults. The radio telemetry transmitter gathers data from a fence charge sensor, battery voltage sensor and/or switch contacts and encodes this information along with a unique address code in a serial data stream that modulates, by frequency shift keying (FSK), a radio frequency (RF) signal. A radio telemetry receiver intercepts the transmitted RF signal and compares the received address code to a preprogrammed unique address code. If code match occurs the received data is transferred to the appropriate displays. Various faults are reported visually and audibly. Fail-safe timers and error detector circuitry in the radio telemetry and transmitter receiver ensure the integrity of the radio telemetry link.
IPC 1-7
IPC 8 full level
G08B 25/10 (2006.01)
CPC (source: EP)
G08B 25/10 (2013.01)
Citation (search report)
- [X] EP 0107390 A1 19840502 - SENTROL INC [US]
- [A] US 4220949 A 19800902 - CHILDRESS EVELYN O [US], et al
- [X] AU 506255 B2 19791220 - LAUBE R
- [X] WO 8200936 A1 19820318 - HUTCHINSON & SONS PTY LTD NORM [AU], et al
- [X] PROCEEDINGS OF THE CARNAHAN CONFERENCE ON CRIME COUNTERMEASURES, Kentucky, 6th - 8th April 1977, pages 217-220; J.H. BUDIANSKY: "Portable RF alarm link system"
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0407776 A2 19910116; EP 0407776 A3 19910918; AU 5755490 A 19910117; BR 9003382 A 19910827; CA 2020228 A1 19910115; ZA 904976 B 19920226
DOCDB simple family (application)
EP 90111713 A 19900621; AU 5755490 A 19900618; BR 9003382 A 19900713; CA 2020228 A 19900629; ZA 904976 A 19900626