GB2287369A - Monitoring apparatus - Google Patents

Monitoring apparatus

Info

Publication number
GB2287369A
GB2287369A GB9510565A GB9510565A GB2287369A GB 2287369 A GB2287369 A GB 2287369A GB 9510565 A GB9510565 A GB 9510565A GB 9510565 A GB9510565 A GB 9510565A GB 2287369 A GB2287369 A GB 2287369A
Authority
GB
United Kingdom
Prior art keywords
voltage
created
signals
signal
monitoring
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.)
Granted
Application number
GB9510565A
Other versions
GB9510565D0 (en
GB2287369B (en
Inventor
Bruce Stanley Gunton
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9510565D0 publication Critical patent/GB9510565D0/en
Publication of GB2287369A publication Critical patent/GB2287369A/en
Application granted granted Critical
Publication of GB2287369B publication Critical patent/GB2287369B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

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. <IMAGE>
GB9510565A 1993-09-24 1994-09-21 Monitoring apparatus Expired - Lifetime GB2287369B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB939319760A GB9319760D0 (en) 1993-09-24 1993-09-24 Monitoring apparatus
GB939319870A GB9319870D0 (en) 1993-09-27 1993-09-27 Monitoring apparatus
PCT/GB1994/002045 WO1995008858A2 (en) 1993-09-24 1994-09-21 Monitoring apparatus

Publications (3)

Publication Number Publication Date
GB9510565D0 GB9510565D0 (en) 1995-07-19
GB2287369A true GB2287369A (en) 1995-09-13
GB2287369B GB2287369B (en) 1998-03-18

Family

ID=26303572

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9510565A Expired - Lifetime GB2287369B (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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2378220A (en) * 1998-08-20 2003-02-05 Bruce Stanley Gunton Aperture closure member monitor and control means
GB2431059A (en) * 2005-09-30 2007-04-11 Chamberlain Group Inc Determining parameters of a motor for a moveable barrier without using sensors

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2378220A (en) * 1998-08-20 2003-02-05 Bruce Stanley Gunton Aperture closure member monitor and control means
GB2378220B (en) * 1998-08-20 2003-04-23 Bruce Stanley Gunton Aperture closures
GB2431059A (en) * 2005-09-30 2007-04-11 Chamberlain Group Inc Determining parameters of a motor for a moveable barrier without using sensors
US7372224B2 (en) 2005-09-30 2008-05-13 The Chamberlain Group, Inc. System and method for determining barrier motor parameters without using sensors
GB2431059B (en) * 2005-09-30 2009-05-20 Chamberlain Group Inc System and method for determining barrier motor parameters without using sensors

Also Published As

Publication number Publication date
WO1995008858A3 (en) 1995-04-20
WO1995008858A2 (en) 1995-03-30
GB9510565D0 (en) 1995-07-19
AU7661194A (en) 1995-04-10
GB2287369B (en) 1998-03-18

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20140920