WO1995008858A3 - Monitoring apparatus - Google Patents

Monitoring apparatus Download PDF

Info

Publication number
WO1995008858A3
WO1995008858A3 PCT/GB1994/002045 GB9402045W WO9508858A3 WO 1995008858 A3 WO1995008858 A3 WO 1995008858A3 GB 9402045 W GB9402045 W GB 9402045W WO 9508858 A3 WO9508858 A3 WO 9508858A3
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
created
signals
signal
monitoring
Prior art date
Application number
PCT/GB1994/002045
Other languages
French (fr)
Other versions
WO1995008858A2 (en
Inventor
Bruce Stanley Gunton
Original Assignee
Bruce Stanley Gunton
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
Priority claimed from GB939319760A external-priority patent/GB9319760D0/en
Priority claimed from GB939319870A external-priority patent/GB9319870D0/en
Application filed by Bruce Stanley Gunton filed Critical Bruce Stanley Gunton
Priority to GB9510565A priority Critical patent/GB2287369B/en
Priority to AU76611/94A priority patent/AU7661194A/en
Publication of WO1995008858A2 publication Critical patent/WO1995008858A2/en
Publication of WO1995008858A3 publication Critical patent/WO1995008858A3/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0851—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load for motors actuating a movable member between two end positions, e.g. detecting an end position or obstruction by overload signal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/054—Application timeslot: duration of actuation or delay between or combination of subsequent actuations determines selected function

Landscapes

  • Power-Operated Mechanisms For Wings (AREA)

Abstract

Apparatus is described for monitoring variations in a parameter such as a varying voltage level. Two signals (30, 40) are created from the varying voltage level. The signal (30) may track the varying voltage with negligible delay, but the signal (40) is created with a larger time constant. Consequently, if the voltage rises suddenly, the voltage (30) will rise more rapidly than the voltage (40) until the two profiles cross. Monitoring the difference between the signals (30, 40) thus allows sudden changes in the voltage to be detected. The technique has many applications such as detecting rises in motor current for an automatic door, arising from the presence of an obstruction.
PCT/GB1994/002045 1993-09-24 1994-09-21 Monitoring apparatus WO1995008858A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9510565A GB2287369B (en) 1993-09-24 1994-09-21 Monitoring apparatus
AU76611/94A AU7661194A (en) 1993-09-24 1994-09-21 Monitoring apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9319760.6 1993-09-24
GB939319760A GB9319760D0 (en) 1993-09-24 1993-09-24 Monitoring apparatus
GB9319870.3 1993-09-27
GB939319870A GB9319870D0 (en) 1993-09-27 1993-09-27 Monitoring apparatus

Publications (2)

Publication Number Publication Date
WO1995008858A2 WO1995008858A2 (en) 1995-03-30
WO1995008858A3 true WO1995008858A3 (en) 1995-04-20

Family

ID=26303572

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/002045 WO1995008858A2 (en) 1993-09-24 1994-09-21 Monitoring apparatus

Country Status (3)

Country Link
AU (1) AU7661194A (en)
GB (1) GB2287369B (en)
WO (1) WO1995008858A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2378219B (en) * 1998-08-20 2003-03-26 Bruce Stanley Gunton Aperture closures
GB9818070D0 (en) * 1998-08-20 1998-10-14 Gunton Bruce S Aperture closures
US7729406B2 (en) 2003-09-10 2010-06-01 Ericsson Technology Licensing Ab Detection of process state change
US7183732B2 (en) 2004-04-22 2007-02-27 Wayne-Dalton Corp. Motorized barrier operator system for controlling a stopped, partially open barrier and related methods
US7109677B1 (en) 2004-05-07 2006-09-19 Wayne-Dalton Corp. Motorized barrier operator system for controlling a barrier after an obstruction detection and related methods
US7372224B2 (en) 2005-09-30 2008-05-13 The Chamberlain Group, Inc. System and method for determining barrier motor parameters without using sensors

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3832941A1 (en) * 1987-09-29 1989-04-13 Alps Electric Co Ltd AUTOMATIC WINDOW REGULATOR
FR2674701A1 (en) * 1991-03-26 1992-10-02 Simu Safety device for installations for opening and closing electrically controlled gates and similar applications
WO1992020891A1 (en) * 1991-05-14 1992-11-26 Volex Group Plc A motor reverse system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3832941A1 (en) * 1987-09-29 1989-04-13 Alps Electric Co Ltd AUTOMATIC WINDOW REGULATOR
FR2674701A1 (en) * 1991-03-26 1992-10-02 Simu Safety device for installations for opening and closing electrically controlled gates and similar applications
WO1992020891A1 (en) * 1991-05-14 1992-11-26 Volex Group Plc A motor reverse system

Also Published As

Publication number Publication date
GB2287369B (en) 1998-03-18
GB2287369A (en) 1995-09-13
WO1995008858A2 (en) 1995-03-30
GB9510565D0 (en) 1995-07-19
AU7661194A (en) 1995-04-10

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