CA2298392A1 - A method of estimating the location of a cable break including a means to measure resistive fault levels for cable sections - Google Patents

A method of estimating the location of a cable break including a means to measure resistive fault levels for cable sections Download PDF

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Publication number
CA2298392A1
CA2298392A1 CA002298392A CA2298392A CA2298392A1 CA 2298392 A1 CA2298392 A1 CA 2298392A1 CA 002298392 A CA002298392 A CA 002298392A CA 2298392 A CA2298392 A CA 2298392A CA 2298392 A1 CA2298392 A1 CA 2298392A1
Authority
CA
Canada
Prior art keywords
cable
section
calculated
resistive
sections
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
CA002298392A
Other languages
French (fr)
Other versions
CA2298392C (en
Inventor
David E. Vokey
Myron Loewen
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.)
Norscan Instruments Ltd
Original Assignee
Norscan Instruments Ltd
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 to US09/352,077 priority Critical patent/US6422087B1/en
Priority to AU53147/99A priority patent/AU5314799A/en
Priority to PCT/US1999/015822 priority patent/WO2000003628A2/en
Application filed by Norscan Instruments Ltd filed Critical Norscan Instruments Ltd
Priority to CA002298392A priority patent/CA2298392C/en
Publication of CA2298392A1 publication Critical patent/CA2298392A1/en
Application granted granted Critical
Publication of CA2298392C publication Critical patent/CA2298392C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B60N2/66—Lumbar supports
    • B60N2/665—Lumbar supports using inflatable bladders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/0244—Non-manual adjustments, e.g. with electrical operation with logic circuits
    • B60N2/0248—Non-manual adjustments, e.g. with electrical operation with logic circuits with memory of positions
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/081—Fluid mattresses or cushions of pneumatic type
    • A47C27/082—Fluid mattresses or cushions of pneumatic type with non-manual inflation, e.g. with electric pumps
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/081—Fluid mattresses or cushions of pneumatic type
    • A47C27/083—Fluid mattresses or cushions of pneumatic type with pressure control, e.g. with pressure sensors
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/10—Fluid mattresses or cushions with two or more independently-fillable chambers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/467—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by fluid means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon
    • B60N2/0021—Seats provided with an occupancy detection means mounted therein or thereon characterised by the type of sensor or measurement
    • B60N2/0024—Seats provided with an occupancy detection means mounted therein or thereon characterised by the type of sensor or measurement for identifying, categorising or investigation of the occupant or object on the seat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/02246—Electric motors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/0244—Non-manual adjustments, e.g. with electrical operation with logic circuits
    • B60N2/0268—Non-manual adjustments, e.g. with electrical operation with logic circuits using sensors or detectors for adapting the seat or seat part, e.g. to the position of an occupant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/0244—Non-manual adjustments, e.g. with electrical operation with logic circuits
    • B60N2/0277—Non-manual adjustments, e.g. with electrical operation with logic circuits characterised by the calculation method or calculation flow chart of sensor data for adjusting the seat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/90—Details or parts not otherwise provided for
    • B60N2/914—Hydro-pneumatic adjustments of the shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2210/00—Sensor types, e.g. for passenger detection systems or for controlling seats
    • B60N2210/40—Force or pressure sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2220/00—Computerised treatment of data for controlling of seats
    • B60N2220/10—Computerised treatment of data for controlling of seats using a database
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2220/00—Computerised treatment of data for controlling of seats
    • B60N2220/20—Computerised treatment of data for controlling of seats using a deterministic algorithm

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Locating Faults (AREA)
  • Seats For Vehicles (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

A method and apparatus are used for locating cable breaks and resistive faults in cables, including fibre optic cables. The conductive shield or armour of the cable is divided into sections, usually at a splice. A step function voltage is applied to one end of the conductive shield. Remote sensors at the end of each section monitor the voltage and current as a function of time and at steady state. The measured data are encoded as current pulses and transmitted along the armour to the end of the cable. A computer at the cable end calculates from the measured voltages and currents the capacitance of each section of the shield. A broken section is identified by comparing the calculated and original capacitances of the sections and the distance along the broken section to the break is calculated from the calculated and original capacitances of the broken section. Resistive faults in the cable are located by calculating a fault resistance of each section of the shield from the measured steady state voltages and currents. A section containing a resistive fault is identified from the magnitude of the calculated fault resistance and the distance to the resistive fault is calculated from the measured steady state voltages and currents of the faulted section.
CA002298392A 1998-07-15 2000-02-14 A method of estimating the location of a cable break including a means to measure resistive fault levels for cable sections Expired - Fee Related CA2298392C (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US09/352,077 US6422087B1 (en) 1998-07-15 1999-07-14 Electronic control system for a variable support mechanism
AU53147/99A AU5314799A (en) 1998-07-15 1999-07-14 Electronic control system for a variable support mechanism
PCT/US1999/015822 WO2000003628A2 (en) 1998-07-15 1999-07-14 Electronic control system for a variable support mechanism
CA002298392A CA2298392C (en) 1998-07-15 2000-02-14 A method of estimating the location of a cable break including a means to measure resistive fault levels for cable sections

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US9285898P 1998-07-15 1998-07-15
US9285498P 1998-07-15 1998-07-15
US9285298P 1998-07-15 1998-07-15
US9285198P 1998-07-15 1998-07-15
US9284998P 1998-07-15 1998-07-15
US9285698P 1998-07-15 1998-07-15
CA002298392A CA2298392C (en) 1998-07-15 2000-02-14 A method of estimating the location of a cable break including a means to measure resistive fault levels for cable sections

Publications (2)

Publication Number Publication Date
CA2298392A1 true CA2298392A1 (en) 2001-08-14
CA2298392C CA2298392C (en) 2003-04-22

Family

ID=27561012

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002298392A Expired - Fee Related CA2298392C (en) 1998-07-15 2000-02-14 A method of estimating the location of a cable break including a means to measure resistive fault levels for cable sections

Country Status (3)

Country Link
AU (1) AU5314799A (en)
CA (1) CA2298392C (en)
WO (1) WO2000003628A2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE503404T1 (en) * 2002-02-28 2011-04-15 Gaymar Ind Inc SELF-ADJUSTING CUSHIONING DEVICE
US7152920B2 (en) * 2003-10-21 2006-12-26 Ts Tech Co., Ltd. Vehicle seat with system for facilitating relieving of fatigue of person sitting on the seat
DE102006008598A1 (en) * 2006-02-24 2007-08-30 Arno Friedrichs Reclining device has mattress, and data interface is present over which valve controllable data are displayed and received wirelessly
DE102008009473A1 (en) * 2008-02-15 2009-08-20 Robert Bosch Gmbh Apparatus and method for inflating inflatable vehicle seat cushion elements
US8769747B2 (en) 2008-04-04 2014-07-08 Select Comfort Corporation System and method for improved pressure adjustment
US10456323B2 (en) 2012-09-26 2019-10-29 Obotics Inc. Methods and devices for fluid driven adult devices
US11033830B2 (en) * 2014-03-11 2021-06-15 Obotics Inc. Methods and devices to hydraulic consumer devices
US9776724B2 (en) * 2015-05-13 2017-10-03 Ami Industries, Inc. Varying tube size of seat to prolong comfort in aerospace vehicle
EP3575144B1 (en) * 2018-05-29 2021-10-20 Fico Cables Lda Dynamic pneumatic support system
GB2586215B (en) * 2019-08-01 2022-03-30 Jaguar Land Rover Ltd Seating apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4655505A (en) * 1984-12-13 1987-04-07 Nhk Spring Co., Ltd. Pneumatically controlled seat for vehicle
US4797962A (en) * 1986-11-05 1989-01-17 Air Plus, Inc. Closed loop feedback air supply for air support beds
US6098000A (en) * 1994-06-24 2000-08-01 Mccord Winn Textron Inc. Interactive, individually controlled, multiple bladder seating comfort adjustment system and method
US5542136A (en) * 1994-08-05 1996-08-06 Stryker Corporation Portable mattress for treating decubitus ulcers
US5794288A (en) * 1996-06-14 1998-08-18 Hill-Rom, Inc. Pressure control assembly for an air mattress

Also Published As

Publication number Publication date
AU5314799A (en) 2000-02-07
CA2298392C (en) 2003-04-22
WO2000003628A8 (en) 2000-07-20
WO2000003628A2 (en) 2000-01-27
WO2000003628A3 (en) 2000-05-04

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Effective date: 20170214