EP0738943A1 - Dispositif de mesure pour plongée, en particulier calculatrice de plongée - Google Patents

Dispositif de mesure pour plongée, en particulier calculatrice de plongée

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Publication number
EP0738943A1
EP0738943A1 EP96810234A EP96810234A EP0738943A1 EP 0738943 A1 EP0738943 A1 EP 0738943A1 EP 96810234 A EP96810234 A EP 96810234A EP 96810234 A EP96810234 A EP 96810234A EP 0738943 A1 EP0738943 A1 EP 0738943A1
Authority
EP
European Patent Office
Prior art keywords
measuring device
diving
movement
organ
changes
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Withdrawn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
EP96810234A
Other languages
German (de)
English (en)
Inventor
Wendelin Egli
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.)
Scubapro EU AG
Original Assignee
Scubapro EU AG
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
Application filed by Scubapro EU AG filed Critical Scubapro EU AG
Publication of EP0738943A1 publication Critical patent/EP0738943A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/32—Decompression arrangements; Exercise equipment
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/001—Electromechanical switches for setting or display
    • G04C3/002—Position, e.g. inclination dependent switches
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G21/00—Input or output devices integrated in time-pieces
    • G04G21/02—Detectors of external physical values, e.g. temperature
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G21/00—Input or output devices integrated in time-pieces
    • G04G21/06—Input or output devices integrated in time-pieces using voice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C2011/021—Diving computers, i.e. portable computers specially adapted for divers, e.g. wrist worn, watertight electronic devices for detecting or calculating scuba diving parameters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/802—Position or condition responsive switch

Definitions

  • the present invention relates to a diving measuring device, in particular a diving computer, with a housing in which electronic components, at least one diving data display means and an electrical energy source are arranged in a watertight manner and has the means for switching on the energy source on electronic components, the diving data display means being assigned lighting which can be switched on and off is.
  • Diving gauges or diving computers of the above-mentioned type have been known for a few years and are used by divers, in particular sport divers, who use compressed air diving devices to increase their safety.
  • Our breathing air is a mixture of approximately 21% oxygen, 78% nitrogen and 1% other gases.
  • Nitrogen is in the blood and in human body tissue in a dissolved form. The amount depends on the pressure surrounding the human body. On the surface of the earth this is the air pressure. If a diver dives to a certain depth, the pressure surrounding his body increases. It follows that the blood and body tissue of the diver can absorb more nitrogen at depth than is possible on the surface. When the diver appears, the nitrogen diffuses from the tissues back into the blood due to the decreasing ambient pressure and is transported by it to the lungs, where it is excreted. If the ambient pressure drops too quickly, the nitrogen dissolved in the blood and body tissue cannot be exhaled quickly enough. As a result of these supersaturations, gas bubbles precipitate, which can lead to damage in the organism.
  • a dive computer now has the essential task of helping to prevent the damage mentioned above from occurring.
  • the dive computer carried during a dive determines the dive profile of the diver as a function of time and uses it to calculate the nitrogen increase or decrease in the human body when the diver stays in a greater or a smaller depth using known formulas or tables.
  • the dive computer shows the diver how to surface and at what depth he has to stay for how long, so that the aforementioned gas bubbles cannot form in the blood.
  • Newer dive computers independently keep a so-called log book, which also takes into account the time spent on the surface of the earth between two or more dives.
  • This object is achieved in that an organ which is responsive to changes in movement is present for switching the lighting on and off.
  • the switching on and off is simple because no specific point on the housing has to be pressed and can in any case be carried out with only one hand.
  • An accelerometer is preferably used as an organ responsive to changes in motion.
  • a microphone would also be conceivable.
  • the acceleration sensor or the microphone are built into the housing of the dive computer in a watertight manner and are not accessible from the outside.
  • the arrangement is consequently simple and unproblematic compared to a pressure switch which must be at least indirectly operable from the outside.
  • Thin-walled elastic points, so-called weak points are not present on the housing of the dive computer according to the invention.
  • Liquid crystal display modules with a backlight are usually used today to display the dive data.
  • Other types of display means with lighting that can be switched on and off are also conceivable and are not excluded from this invention.
  • the preferred acceleration sensor outputs an electrical signal that is dependent on the size of a change in movement.
  • This signal is fed to evaluation electronics for switching the illumination of the diving data display means on and off and is evaluated there accordingly.
  • An electronic evaluation circuit essentially comprises an amplifier, a bistable switching stage and a driver circuit for controlling the lighting.
  • the evaluation electronics is designed such that, in particular small signals, which are only caused by rubbing on the housing of the dive computer or by moving it slowly, do not cause the lights to switch.
  • a low-pass filter or preferably a band-pass filter is provided.
  • the upper cut-off frequency of the filter used is approximately between 20 and 50 Hz, preferably 25 Hz.
  • the lower cut-off frequency of the bandpass filter preferably used is 6 Hz. It can be in a frequency range from 3 to 15 Hz.
  • the low pass filter or the band pass filter can be constructed as an active or passive RC filter. The filter is advantageously connected upstream of the amplifier mentioned.
  • FIG. 1 shows a top view of a first embodiment of an immersion measuring device 1 according to the invention.
  • a diving computer 2 which is held in a carrying device 20, preferably made of an elastic material, for example a silicone-containing material.
  • the diving computer 2 which is essentially cylindrical and tablet-shaped in the example shown, is inserted into a hollow cylindrical opening of the carrying device 20.
  • a fastening strap 21 which is intended for fastening the immersion measuring device 1 to an arm or leg of the diver.
  • it is looped around the corresponding link, passed through a through opening 23 of a fastening tab 22 of the carrying device, passed through further through openings 25.1, 25.2 and brought into engagement with a locking tab 24.
  • the fastening strap 21 and the fastening tab 22 are attached to the carrying device 20, which essentially corresponds to a watch case, in a bracelet of a wristwatch. So that the fastening strap 21 can come into engagement with the locking tab 24, slot-like openings running transversely to the strap are provided at periodic intervals on the part of the fastening strap not shown.
  • the dive computer 2 is installed in a cup-shaped housing 3, advantageously made of a transparent plastic.
  • a circumferential housing rib 26 limits the insertion depth into the hollow-cylindrical opening of the carrying device 20.
  • a display means 5 is arranged on the inside immediately adjacent to the housing base. This is preferably a liquid crystal display module 5, the display field of which is visible through the transparent housing base.
  • Two small openings are made in the bottom of the housing, through which a metal pin 7.1, 7.2 is guided, in such a way that the end face of said metal pins, preferably made of stainless steel, are flush with the outer surface of the bottom of the housing.
  • the metal pins are designed to turn on the dive computer. They are electrically connected to each other in the water by the water conductance and thus switch on of the dive computer. As a result, this remains switched on at least during the entire diving process.
  • the liquid crystal display module 5, the contact pins 7.1, 7.2 can be seen through the transparent housing, which components are essentially arranged on the side of a printed circuit board 27 facing the housing base of the housing 3.
  • the electronic components are supplied with an electrical energy source, preferably a lithium battery 6. This can be connected to the electronic components using the switch-on means 7.1, 7.2.
  • the organ according to the invention, which responds to changes in movement, is drawn at 8. As already said, this organ is preferably an accelerometer.
  • a microphone for example an electret microphone, can also be used.
  • An evaluation electronics circuit is identified by 10, which evaluates signals which are output by the acceleration sensor when there are changes in movement and thereby generates an output signal which is intended for switching on and off a backlight which is integrated in the liquid crystal display module 5.
  • the cup-shaped housing 3 is filled with a permanently elastic silicone compound. All components housed in the housing are therefore protected against water and moisture.
  • the battery 6 is replaced, which must only be done after a period of about five years when the dive computer is in heavy use, by opening the silicone casting compound at the appropriate point and by re-casting after changing the battery.
  • the pressure sensor 28 can sense the ambient pressure outside the housing thanks to the permanently elastic silicone casting compound.
  • the acceleration sensor 8 can also be designed such that it preferably detects changes in movement in one direction. This direction can be a direction approximately perpendicular to the end faces of the tablet-shaped dive computer 2.
  • the electronic components 4 When viewed from the rear according to FIG. 3, essentially the printed circuit board 27, the electronic components 4 combined as a block, the organ 8 responsive to changes in movement, the evaluation electronics circuit 10 associated therewith and the electrical energy source 6 are visible.
  • the electronic evaluation circuit 10 and the organ 8, which parts are only shown symbolically here, are of course preferably also arranged on the printed circuit board 27.
  • the space facing away from the circuit board above the energy source or battery is freely accessible.
  • the silicone potting compound can therefore be easily removed at this point, the battery replaced and the opening created for this purpose closed again with a silicone potting compound.
  • the housing cover 30 is provided with a first opening through which a battery compartment in which the electrical energy source 6 is inserted is accessible.
  • the battery compartment can be closed watertight with a battery compartment closure 31.
  • the evaluation electronics circuit for evaluating the signal 9 output by the acceleration sensor 8 is shown in block diagram form.
  • the electrical signal 9 emitted by the acceleration sensor when there is a change in movement is fed to a filter 14.
  • This can be an active or passive RC filter and can be designed as a low-pass filter or preferably as a band-pass filter.
  • the filtered signal passes through a filter output 34 to an amplifier designated 11.
  • the signal is amplified there and then fed to a bistable switching stage 2. This switches a driver circuit 13 either on or off. In the switched-on state, the driver circuit 13 supplies the electrical energy 33 which is necessary for the backlighting of the LCD module 5.
  • the bistable switching stage 12 at its input receives a correspondingly large signal from the amplifier 11, which exceeds a certain preset threshold, switches the switching stage from its current on or off state to the other bistable state. It remains there until an input signal that exceeds the specified threshold arrives again.
  • the illumination of the display means, in particular the backlight of the LCD module 5, is also always switched off when no data is provided on the latter. This is always the case when the dive computer is switched off. However, a displayless state can also occur when the dive computer is switched on. The lighting in the latter case can be switched off, for example, via a line which acts on the bistable switching stage 12 and is connected to the electronic elements 4.
  • the filter 14 has the task of filtering the typical signals, which the acceleration sensor 8 emits when the dive computer 2 strikes or knocks, and feeds it to the amplifier 11.
  • the filter is intended to prevent signals from only slight changes in movement or rubbing noises from also causing the lighting to be switched on or off. It has been found that when the dive computer is struck or knocked on, the acceleration sensor 8 emits pronounced signals in the frequency range between 6 and 25 Hz. So that preferably only these signals are applied to the amplifier 11, it is provided that a bandpass filter with a pass characteristic shown in FIG.
  • the bandpass filter has an upper cut-off frequency 37 of preferably 25 Hz and a lower cut-off frequency of preferably 6 Hz. However, the cut-off frequencies can lie approximately in the frequency ranges mentioned at the beginning.
  • a lowpass filter could also be provided.
  • a corresponding characteristic curve of such a filter is identified in FIG. 6 by reference number 35.
  • the described embodiment of switching the lighting of the display means of the dive computer according to the invention on and off shows that the switching operation is carried out only by knocking on the dive computer or by striking the latter on any other object, in particular can be done easily and safely under water. It does not matter whether the dive computer, as shown in FIG. 1, is worn looped around an arm or a leg, or whether it is simply attached to a fastening strap at one point of the diving suit or to an object of the diving equipment.
  • the entire device for switching the lighting on and off is cast watertight in the sealing compound. Special problems, in particular sealing problems when manufacturing the diving computer, therefore do not occur.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Electric Clocks (AREA)
EP96810234A 1995-04-21 1996-04-15 Dispositif de mesure pour plongée, en particulier calculatrice de plongée Withdrawn EP0738943A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH115295 1995-04-21
CH1152/95 1995-04-21

Publications (1)

Publication Number Publication Date
EP0738943A1 true EP0738943A1 (fr) 1996-10-23

Family

ID=4203702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810234A Withdrawn EP0738943A1 (fr) 1995-04-21 1996-04-15 Dispositif de mesure pour plongée, en particulier calculatrice de plongée

Country Status (2)

Country Link
US (1) US5760691A (fr)
EP (1) EP0738943A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2029973A1 (fr) * 2006-05-31 2009-03-04 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Dispositif indicateur d'une grandeur physique

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60200557T2 (de) * 2001-03-05 2005-06-30 Fps Food Processing Systems B.V. Verfahren und Vorrichtung zur Bestimmung des Schwingverhaltens schwingender Körper wie Eier
AU2003238881A1 (en) * 2002-06-07 2003-12-22 California Institute Of Technology Method and resulting device for fabricating electret materials on bulk substrates
AU2003238880A1 (en) * 2002-06-07 2003-12-22 California Institute Of Technology Electret generator apparatus and method
EP1521364B1 (fr) * 2003-09-29 2013-08-21 EM Microelectronic-Marin SA Procédé et dispositif pour le filtrage de signaux produits par un accéléromètre de type piézo-électrique, et application à un objet portatif tel qu'une montre
US20090085865A1 (en) * 2007-09-27 2009-04-02 Liquivision Products, Inc. Device for underwater use and method of controlling same
DE102007047133A1 (de) * 2007-10-02 2009-04-09 Uemis Ag Gehäuse für einen Tauchcomputer
GB2465824B (en) * 2008-12-03 2011-04-06 James Christopher Irlam Motion analysis device for sports
CN112327194B (zh) * 2020-10-21 2021-09-24 北京航空航天大学 一种锂电池容量跳水识别方法及装置

Citations (4)

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Publication number Priority date Publication date Assignee Title
US4036007A (en) * 1975-08-13 1977-07-19 Shelley Edwin F Light emitting diode watch with acceleration responsive switch
JPS58111790A (ja) * 1981-12-25 1983-07-02 Shimauchi Seiki Kk 電子時計用回路
EP0152823A2 (fr) * 1984-02-07 1985-08-28 Braun Aktiengesellschaft Dispositif d'alarme, en particulier pour montre-réveil ou agenda
JPS61133891A (ja) * 1984-12-04 1986-06-21 Citizen Watch Co Ltd 水深計付電子時計

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CH656769A4 (fr) * 1969-04-30 1972-03-15
US3729923A (en) * 1971-03-11 1973-05-01 Kuhn F Sa Wrist watch with dial illuminating
US3828611A (en) * 1972-11-10 1974-08-13 Farallon Ind Portable underwater indicating instrument for divers
US3783604A (en) * 1973-02-05 1974-01-08 Revision Traitement De I Infor Wrist watch with a dial-illuminating device
US3855784A (en) * 1973-07-30 1974-12-24 D Foellner Illuminated time piece
US3910117A (en) * 1974-05-24 1975-10-07 Roy Wicklund Rate of ascent guide device for underwater divers
FR2436996A1 (fr) * 1978-09-19 1980-04-18 Tech Cales Automation Et Dispositif permettant l'obtention d'un signal electrique proportionnel a une quantite de mouvements, et par la meme, capable de detecter tout mouvement ou acceleration
US5023593A (en) * 1990-08-20 1991-06-11 Brox Steven E Passive infrared/acoustic pool security system
US5197489A (en) * 1991-06-17 1993-03-30 Precision Control Design, Inc. Activity monitoring apparatus with configurable filters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036007A (en) * 1975-08-13 1977-07-19 Shelley Edwin F Light emitting diode watch with acceleration responsive switch
JPS58111790A (ja) * 1981-12-25 1983-07-02 Shimauchi Seiki Kk 電子時計用回路
EP0152823A2 (fr) * 1984-02-07 1985-08-28 Braun Aktiengesellschaft Dispositif d'alarme, en particulier pour montre-réveil ou agenda
JPS61133891A (ja) * 1984-12-04 1986-06-21 Citizen Watch Co Ltd 水深計付電子時計

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
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PATENT ABSTRACTS OF JAPAN vol. 10, no. 327 (P - 513) 7 November 1986 (1986-11-07) *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 290 (P - 742) 9 August 1988 (1988-08-09) *
PATENT ABSTRACTS OF JAPAN vol. 7, no. 220 (P - 226) 30 September 1983 (1983-09-30) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2029973A1 (fr) * 2006-05-31 2009-03-04 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Dispositif indicateur d'une grandeur physique

Also Published As

Publication number Publication date
US5760691A (en) 1998-06-02

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