WIRELESS OPENING PART OPENING/CLOSING DETECTION SYSTEM
PURPOSE:To obtain a means operating excellently also under comparatively noisy circumstances and when the distance of a controller side antenna/an opening and closing detection sensor part is comparatively far, in a wireless opening part opening/closing detection system for concentratedly performing...
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| creator | YAMAZAKI MASAMI MASAKADO AKIROU |
| description | PURPOSE:To obtain a means operating excellently also under comparatively noisy circumstances and when the distance of a controller side antenna/an opening and closing detection sensor part is comparatively far, in a wireless opening part opening/closing detection system for concentratedly performing a remote monitoring of the opening/closing states of plural opening parts of a building such as windows and doors, etc. CONSTITUTION:A quasi-synchronization and detection is performed for the reception signal of the receiver 7 of a controller part C by first and second reference signals controlled so that they may have an orthogonal relation with each other by an oscillator 6 and a pi/2 phase converter 21. Two orthogonal reception signals obtained by the quasi-synchronization and detection are sampled by a prescribed cycle, an A/D conversion is performed for the signals by each A/D converter 23, they are made digital values and these values are stored in a memory 24. The deviation DELTAf of an echo and the oscillator 6 is detected by performing an FFT processing by an FFT arithmetic unit 26, the oscillator 6 is controlled based on this deviation, and an oscillation frequency f is made to coicide with the frequency of the echo. |
| format | Patent |
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Two orthogonal reception signals obtained by the quasi-synchronization and detection are sampled by a prescribed cycle, an A/D conversion is performed for the signals by each A/D converter 23, they are made digital values and these values are stored in a memory 24. The deviation DELTAf of an echo and the oscillator 6 is detected by performing an FFT processing by an FFT arithmetic unit 26, the oscillator 6 is controlled based on this deviation, and an oscillation frequency f is made to coicide with the frequency of the echo.</description><edition>5</edition><language>eng</language><subject>ALARM SYSTEMS ; ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; ORDER TELEGRAPHS ; PHYSICS ; SELECTING ; SIGNALLING ; SIGNALLING OR CALLING SYSTEMS</subject><creationdate>1994</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19941007&DB=EPODOC&CC=JP&NR=H06284478A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19941007&DB=EPODOC&CC=JP&NR=H06284478A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YAMAZAKI MASAMI</creatorcontrib><creatorcontrib>MASAKADO AKIROU</creatorcontrib><title>WIRELESS OPENING PART OPENING/CLOSING DETECTION SYSTEM</title><description>PURPOSE:To obtain a means operating excellently also under comparatively noisy circumstances and when the distance of a controller side antenna/an opening and closing detection sensor part is comparatively far, in a wireless opening part opening/closing detection system for concentratedly performing a remote monitoring of the opening/closing states of plural opening parts of a building such as windows and doors, etc. CONSTITUTION:A quasi-synchronization and detection is performed for the reception signal of the receiver 7 of a controller part C by first and second reference signals controlled so that they may have an orthogonal relation with each other by an oscillator 6 and a pi/2 phase converter 21. Two orthogonal reception signals obtained by the quasi-synchronization and detection are sampled by a prescribed cycle, an A/D conversion is performed for the signals by each A/D converter 23, they are made digital values and these values are stored in a memory 24. 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Two orthogonal reception signals obtained by the quasi-synchronization and detection are sampled by a prescribed cycle, an A/D conversion is performed for the signals by each A/D converter 23, they are made digital values and these values are stored in a memory 24. The deviation DELTAf of an echo and the oscillator 6 is detected by performing an FFT processing by an FFT arithmetic unit 26, the oscillator 6 is controlled based on this deviation, and an oscillation frequency f is made to coicide with the frequency of the echo.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | ALARM SYSTEMS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ORDER TELEGRAPHS PHYSICS SELECTING SIGNALLING SIGNALLING OR CALLING SYSTEMS |
| title | WIRELESS OPENING PART OPENING/CLOSING DETECTION SYSTEM |
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