GB2137363A - Speed indicating device for a ski or the like - Google Patents

Speed indicating device for a ski or the like Download PDF

Info

Publication number
GB2137363A
GB2137363A GB08408075A GB8408075A GB2137363A GB 2137363 A GB2137363 A GB 2137363A GB 08408075 A GB08408075 A GB 08408075A GB 8408075 A GB8408075 A GB 8408075A GB 2137363 A GB2137363 A GB 2137363A
Authority
GB
United Kingdom
Prior art keywords
ski
speed
indicating device
speed indicating
air
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.)
Withdrawn
Application number
GB08408075A
Other versions
GB8408075D0 (en
Inventor
William Nevil Heaton Johnson
Original Assignee
Johnson William N H
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 GB838308818A priority Critical patent/GB8308818D0/en
Priority to GB838310215A priority patent/GB8310215D0/en
Application filed by Johnson William N H filed Critical Johnson William N H
Priority to GB08408075A priority patent/GB2137363A/en
Publication of GB8408075D0 publication Critical patent/GB8408075D0/en
Publication of GB2137363A publication Critical patent/GB2137363A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42Devices characterised by the use of electric or magnetic means
    • G01P3/50Devices characterised by the use of electric or magnetic means for measuring linear speed
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P7/00Measuring speed by integrating acceleration

Abstract

A speed indicating device 12 for a ski 10 or the like is provided which is mounted or adapted to be mounted on the ski 10 or the like, for example on the upper surface of the ski at the rear end thereof. The speed indicating device comprises an air speed sensor and electronic processing means. The sensor may comprise a pilot/static arrangement, a hot wire anemometer or a turbine. Alternatively speed may be determined using an accelerometer. A display unit may be carried by the skier and provide indications of time and distance. <IMAGE>

Description

SPECIFICATION Speed indicating device for a ski or the like This invention relates to a speed indicating device for a ski or the like.

It is among the objects of the invention to provide a speed indicating device for a ski or the like conveyance which, in operation, does not interfere with efficiency of the ski or the like and which does not require the use of reference point fixed relative to the terrain.

According to one aspect of the invention there is provided a speed indicating device for a ski or the like conveyance, comprising an air-speed sensor adapted to be mounted on the ski or the like, or carried by the skier or person carried by such conveyance in the path of the air flow relative to the ski or the like conveyance when the latter is in motion.

According to another aspect of the invention there is provided the combination of a ski with a speed indication device according to the above noted aspect of the invention, the air-speed sensor being mounted on the ski so as to be in the path of the air flow relative to the skier when in motion.

According to yet another aspect of the invention, there is provided a speed indicating device for a ski or the like conveyance comprising an accelerometer adapted to be mounted on a ski or like conveyance, and integration means whereby the measurements of acceleration made by the accelometer may be integrated with respect to time to yield an indication of current velocity.

Embodiments of the invention are described below by way of example with reference to the sole figure of the accompanying drawings which is a perspective view of a snow ski with a speed indicating device embodying the invention mounted thereon.

As shown in the drawing, a speed indicating device for a snow ski 10 includes a unit 12 mounted on its upper surface adjacent the rear end thereof, the unit 12, in the embodiment illustrated, taking the form of a rectangular block with an aperture 14 in its front face communicating with a cavity in the unit.

The unit 12 of the speed indicating device incorporates an air-speed indicator and electronic processing means, for example, including a microprocessor, whereby the signals from the air-speed sensing device can be converted into a speed indication, for example in digital or, if preferred in analogue form on an appropriate display (not shown).

The display may, for example, be provided in a remote unit adapted to be connected with the circuity in the unit 12 mounted on the ski by means of the flexible lead or the like, with the remote display unit being adapted to be carried by the skier.

The air-speed sensor may operate on the Pitot pressure system, and may, for example, incorporate a pressure transducer arranged to sense the pressure difference between the cavity communicating with aperture 14 and a static source (not shown). The cavity in this case may take the form of a blind bore.

Instead of a Pitot system, the air-speed sensor may take the form of a hot-wire anemometer, with the sensing element or wire being disposed within the rectangular block, for protection, in a through passage the entrance to which is formed by the aperture 14.

The air-speed sensor may, alternatively, comprise a turbine mounted within the rectangular casing in a passage extending through the casing from the aperture 14, forming the entrance to said passage to an outlet (not shown), with the rotational speed of the turbine being sensed electrically or electronically.

As the device operates by measuring air-speed, its preferably incorporates means whereby the device may be arranged to take account of the wind speed prevailing so as to provide an indication of ground speed rather than air-speed. In such a case, the skier will normally "zero" the speed indicating device whilst stationery, in which condition the wind speed at the location of the device will correspond with the air speed sensed.

In another, and preferred embodiment, air-speed measurement is dispensed with, and the device 12 incorporates an accelerometer and an electronic, e.g. quartz crystal based, clock, and is arranged to calculate speed by integrating the sensed acceleration with respect to time. The accelerometer preferably operates on the piezo-electric principle, in a manner somewhat analagous to gramaphone pickup heads using this principle, to provide, in a simple and relatively inexpensive manner, an electrical output signal corresponding to acceleration to circuitry in the device 12 to yield the derived speed indication.

In this embodiment, of course, the accelerometer is devised so as to respond only to accelerations and decelerations in the longitudinal direction of the ski.

The device 12 may be arranged to give on demand (for example by appropriate operation of a control button or buttons or the like, on the unit 12 or on the remote unit carried by the skier, where such a remote unit is provided), any of a variety of indications in addition to an indication of instantaneous speed. Indications which may be given on demand, for example, are an indication of average speed over a predetermined period, an indication of maximum speed reached, an indication of distance travelled over a predetermined period, etc. The device may also be arranged to operate as chronograph and stop-watch to give, when required, an indication of time of day, or an indication elapsed time spent skiing, etc. The device may also be arranged, for example, to store previously recorded best speeds, best times, etc and to display such quantities on demand, on operation of the appropriate control.

If desired, the entire device may be arranged to be carried on the skier's body, rather than be mounted on one of the skis or may be mounted at any other appropriate location on the ski.

It will also be appreciated that the use of the device disclosed is not confined specifically to snow skis, but the device may be utilised on other modes of conveyance, such as ice skates, toboggans, water skis, skateboards, etc, or carried by persons carried by such modes of conveyance.

Claims (12)

1. A speed indicating device for a ski or the like conveyance comprising an air-speed sensor to be mounted on a ski or the like conveyance, or carried by the skier or person carried by such conveyance in the path of the air flow relative to the ski or the like conveyance when the latter is in motion.
2. A speed indicating device according to claim 1, wherein said air-speed sensor comprises a pitot tube or the like device with an associated air pressure measuring means.
3. A speed indicating device according to claim 1 wherein said air-speed sensor comprises a hot wire anemometer.
4. A speed indicating device according to claim 1 wherein said air-speed sensor comprises an airdriven turbine.
5. A speed indicating device according to any preceding claim including processing means arranged to integrate the sensed speed over a time to derive the distance travelled over said time.
6. The combination of a ski with a speed indicating device according to claim 1, the air-speed sensor being mounted on the ski so as to be in the path of the air flow relative to the skier when in motion.
7. A speed indicating device for a ski or the like conveyance comprising an accelerometer adapted to be mounted on a ski or like conveyance, and integration means whereby the measurements of acceleration made by the accelometer may be integrated with respect to time to yield an indication of current velocity.
8. A speed indicating device according to claim 7 wherein said accelerometer operates piezoelectrically and provides an electrical signal, indicative of acceleration, to electronic integrating and processing means incorporating an electronic clock.
9. The combination of a ski with a device according to claim 7 or claim 8.
10. A speed indicating device for a ski, substantially as hereinbefore described with reference to, and as shown in, the accompanying drawing.
11. The combination of a ski with a speed indicating device, substantially as hereinbefore described with reference to, and as shown in, the accompanying drawings.
12. Any novel feature or combination of features described herein.
GB08408075A 1983-03-30 1984-03-29 Speed indicating device for a ski or the like Withdrawn GB2137363A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB838308818A GB8308818D0 (en) 1983-03-30 1983-03-30 Speed indicating device for ski & c
GB838310215A GB8310215D0 (en) 1983-04-15 1983-04-15 Speed indicating device
GB08408075A GB2137363A (en) 1983-03-30 1984-03-29 Speed indicating device for a ski or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08408075A GB2137363A (en) 1983-03-30 1984-03-29 Speed indicating device for a ski or the like

Publications (2)

Publication Number Publication Date
GB8408075D0 GB8408075D0 (en) 1984-05-10
GB2137363A true GB2137363A (en) 1984-10-03

Family

ID=27262033

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08408075A Withdrawn GB2137363A (en) 1983-03-30 1984-03-29 Speed indicating device for a ski or the like

Country Status (1)

Country Link
GB (1) GB2137363A (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2600423A1 (en) * 1986-06-23 1987-12-24 Laforge Eric Device for measuring and displaying the speed of a moving object
WO1990009597A1 (en) * 1989-02-20 1990-08-23 Janusz Kazimierz Buczkowski Personal speed measuring equipment
WO2007129155A2 (en) * 2006-05-08 2007-11-15 Nokia Corporation Improved mobile communication terminal and method
US7433805B2 (en) 1994-11-21 2008-10-07 Nike, Inc. Pressure sensing systems for sports, and associated methods
US7457724B2 (en) 1994-11-21 2008-11-25 Nike, Inc. Shoes and garments employing one or more of accelerometers, wireless transmitters, processors, altimeters, to determine information such as speed to persons wearing the shoes or garments
US7467060B2 (en) 2006-03-03 2008-12-16 Garmin Ltd. Method and apparatus for estimating a motion parameter
US7698101B2 (en) 2007-03-07 2010-04-13 Apple Inc. Smart garment
US7813715B2 (en) 2006-08-30 2010-10-12 Apple Inc. Automated pairing of wireless accessories with host devices
US7913297B2 (en) 2006-08-30 2011-03-22 Apple Inc. Pairing of wireless devices using a wired medium
US7911339B2 (en) 2005-10-18 2011-03-22 Apple Inc. Shoe wear-out sensor, body-bar sensing system, unitless activity assessment and associated methods
US7949488B2 (en) 1994-11-21 2011-05-24 Nike, Inc. Movement monitoring systems and associated methods
US8036851B2 (en) 1994-11-21 2011-10-11 Apple Inc. Activity monitoring systems and methods
US8055469B2 (en) 2006-03-03 2011-11-08 Garmin Switzerland Gmbh Method and apparatus for determining the attachment position of a motion sensing apparatus
US8060229B2 (en) 2006-05-22 2011-11-15 Apple Inc. Portable media device with workout support
US8073984B2 (en) 2006-05-22 2011-12-06 Apple Inc. Communication protocol for use with portable electronic devices
US8374825B2 (en) 2000-12-15 2013-02-12 Apple Inc. Personal items network, and associated methods
US9137309B2 (en) 2006-05-22 2015-09-15 Apple Inc. Calibration techniques for activity sensing devices
US9868041B2 (en) 2006-05-22 2018-01-16 Apple, Inc. Integrated media jukebox and physiologic data handling application

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB498140A (en) * 1937-07-05 1939-01-04 William George Taylor Improvements in fluid flow indicating and recording devices
GB804333A (en) * 1954-04-01 1958-11-12 Harry Richard Adolph Dedow Improvements in and relating to liquid current meters
GB952315A (en) * 1962-05-07 1964-03-18 Rosemount Engineering A G Improvements in or relating to pressure instrumentation devices
GB1157368A (en) * 1967-06-30 1969-07-09 Airflow Dev Ltd Improvements relating to Vane Anemometers
EP0056598A2 (en) * 1981-01-13 1982-07-28 Dieter Jander Cross-country ski with distance measuring instrument
EP0060361A1 (en) * 1981-03-12 1982-09-22 John William Lowrey Runners watch
EP0095040A1 (en) * 1982-05-24 1983-11-30 Dieter Flasch Speed measuring apparatus for flowable media

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB498140A (en) * 1937-07-05 1939-01-04 William George Taylor Improvements in fluid flow indicating and recording devices
GB804333A (en) * 1954-04-01 1958-11-12 Harry Richard Adolph Dedow Improvements in and relating to liquid current meters
GB952315A (en) * 1962-05-07 1964-03-18 Rosemount Engineering A G Improvements in or relating to pressure instrumentation devices
GB1157368A (en) * 1967-06-30 1969-07-09 Airflow Dev Ltd Improvements relating to Vane Anemometers
EP0056598A2 (en) * 1981-01-13 1982-07-28 Dieter Jander Cross-country ski with distance measuring instrument
EP0060361A1 (en) * 1981-03-12 1982-09-22 John William Lowrey Runners watch
EP0095040A1 (en) * 1982-05-24 1983-11-30 Dieter Flasch Speed measuring apparatus for flowable media

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2600423A1 (en) * 1986-06-23 1987-12-24 Laforge Eric Device for measuring and displaying the speed of a moving object
WO1990009597A1 (en) * 1989-02-20 1990-08-23 Janusz Kazimierz Buczkowski Personal speed measuring equipment
US7983876B2 (en) 1994-11-21 2011-07-19 Nike, Inc. Shoes and garments employing one or more of accelerometers, wireless transmitters, processors altimeters, to determine information such as speed to persons wearing the shoes or garments
US8762092B2 (en) 1994-11-21 2014-06-24 Nike, Inc. Location determining system
US7433805B2 (en) 1994-11-21 2008-10-07 Nike, Inc. Pressure sensing systems for sports, and associated methods
US8849606B2 (en) 1994-11-21 2014-09-30 Nike, Inc. Movement monitoring systems and associated methods
US8600699B2 (en) 1994-11-21 2013-12-03 Nike, Inc. Sensing systems for sports, and associated methods
US7623987B2 (en) 1994-11-21 2009-11-24 Nike, Inc. Shoes and garments employing one or more of accelerometers, wireless transmitters, processors, altimeters, to determine information such as speed to persons wearing the shoes or garments
US8463573B2 (en) 1994-11-21 2013-06-11 Nike, Inc. Movement monitoring systems and associated methods
US8249831B2 (en) 1994-11-21 2012-08-21 Nike, Inc. Pressure sensing systems for sports, and associated methods
US7813887B2 (en) 1994-11-21 2010-10-12 Nike, Inc. Location determining system
US8352211B2 (en) 1994-11-21 2013-01-08 Apple Inc. Activity monitoring systems and methods
US8036851B2 (en) 1994-11-21 2011-10-11 Apple Inc. Activity monitoring systems and methods
US7949488B2 (en) 1994-11-21 2011-05-24 Nike, Inc. Movement monitoring systems and associated methods
US7966154B2 (en) 1994-11-21 2011-06-21 Nike, Inc. Pressure sensing systems for sports, and associated methods
US7457724B2 (en) 1994-11-21 2008-11-25 Nike, Inc. Shoes and garments employing one or more of accelerometers, wireless transmitters, processors, altimeters, to determine information such as speed to persons wearing the shoes or garments
US8374825B2 (en) 2000-12-15 2013-02-12 Apple Inc. Personal items network, and associated methods
US9643091B2 (en) 2000-12-15 2017-05-09 Apple Inc. Personal items network, and associated methods
US10080971B2 (en) 2000-12-15 2018-09-25 Apple Inc. Personal items network, and associated methods
US8688406B2 (en) 2000-12-15 2014-04-01 Apple Inc. Personal items network, and associated methods
US9968158B2 (en) 2005-10-18 2018-05-15 Apple Inc. Shoe wear-out sensor, body-bar sensing system, unitless activity assessment and associated methods
US9578927B2 (en) 2005-10-18 2017-02-28 Apple Inc. Shoe wear-out sensor, body-bar sensing system, unitless activity assessment and associated methods
US8749380B2 (en) 2005-10-18 2014-06-10 Apple Inc. Shoe wear-out sensor, body-bar sensing system, unitless activity assessment and associated methods
US8217788B2 (en) 2005-10-18 2012-07-10 Vock Curtis A Shoe wear-out sensor, body-bar sensing system, unitless activity assessment and associated methods
US7911339B2 (en) 2005-10-18 2011-03-22 Apple Inc. Shoe wear-out sensor, body-bar sensing system, unitless activity assessment and associated methods
US8036850B2 (en) 2006-03-03 2011-10-11 Garmin Switzerland Gmbh Method and apparatus for estimating a motion parameter
US8055469B2 (en) 2006-03-03 2011-11-08 Garmin Switzerland Gmbh Method and apparatus for determining the attachment position of a motion sensing apparatus
US7467060B2 (en) 2006-03-03 2008-12-16 Garmin Ltd. Method and apparatus for estimating a motion parameter
WO2007129155A3 (en) * 2006-05-08 2008-04-17 Nokia Corp Improved mobile communication terminal and method
WO2007129155A2 (en) * 2006-05-08 2007-11-15 Nokia Corporation Improved mobile communication terminal and method
US8529407B2 (en) 2006-05-08 2013-09-10 Nokia Corporation Mobile communication terminal and method
US9154554B2 (en) 2006-05-22 2015-10-06 Apple Inc. Calibration techniques for activity sensing devices
US9137309B2 (en) 2006-05-22 2015-09-15 Apple Inc. Calibration techniques for activity sensing devices
US8060229B2 (en) 2006-05-22 2011-11-15 Apple Inc. Portable media device with workout support
US9868041B2 (en) 2006-05-22 2018-01-16 Apple, Inc. Integrated media jukebox and physiologic data handling application
US8073984B2 (en) 2006-05-22 2011-12-06 Apple Inc. Communication protocol for use with portable electronic devices
US8181233B2 (en) 2006-08-30 2012-05-15 Apple Inc. Pairing of wireless devices using a wired medium
US7913297B2 (en) 2006-08-30 2011-03-22 Apple Inc. Pairing of wireless devices using a wired medium
US7813715B2 (en) 2006-08-30 2010-10-12 Apple Inc. Automated pairing of wireless accessories with host devices
US8099258B2 (en) 2007-03-07 2012-01-17 Apple Inc. Smart garment
US7698101B2 (en) 2007-03-07 2010-04-13 Apple Inc. Smart garment

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Publication number Publication date
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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)