WO2000039533A1 - Water-tight measurement device - Google Patents
Water-tight measurement device Download PDFInfo
- Publication number
- WO2000039533A1 WO2000039533A1 PCT/CH1999/000584 CH9900584W WO0039533A1 WO 2000039533 A1 WO2000039533 A1 WO 2000039533A1 CH 9900584 W CH9900584 W CH 9900584W WO 0039533 A1 WO0039533 A1 WO 0039533A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- membrane
- cover
- water
- housing
- pressure
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
Definitions
- the present invention relates to a device for measuring and displaying physical measurement quantities, comprising an at least almost watertight housing, in or on which at least one measurement sensor is arranged, and at least one display for displaying the physical measurement quantity (s) and a waterproof measurement device for determining the Ambient pressure.
- Measuring devices for leisure, sport or commercial outdoor applications are preferably designed to be moisture-insensitive or waterproof, so that the functionality is guaranteed even in bad weather, in rain or when doing water sports and / or underwater measurements.
- a water-impermeable pressure equalization membrane is arranged in the housing of the device, the pressure sensor being arranged directly behind the membrane. This measuring arrangement is unfavorable because the pressure transmission from membrane to measuring sensor is inaccurate, since the membranes used are usually not dimensionally stable over a certain period of time.
- the pressure sensor is thus arranged at a distance from the membrane, since, due to the vapor or gas permeability of the water-impermeable pressure compensation membrane, the pressure inside the housing is the same as the ambient pressure.
- the disadvantage of these devices is, on the one hand, that the incorporation of such a pressure compensation membrane in a device housing is relatively complex in terms of production technology and therefore expensive, and in addition, these pressure compensation membranes only have a limited functionality, which renders the entire device inoperable and therefore has to be replaced as a whole is.
- the object is achieved by means of a device according to the wording, in particular according to claim 1.
- the device proposed according to the invention is characterized in that a cover or a cover is provided in the housing wall, which cover ensures that the interior of the housing can be at least almost watertight and releasably closed, in that Cover resp. in this cover an at least partially waterproof ge, gas and / or water vapor permeable membrane is arranged.
- This cover or cover can be a screw cap, it can also be arranged on or in the housing wall by means of a bayonet lock, or it can be inserted or snapped in. It is essential that the arrangement of the cover or the cover is largely watertight, which is made possible, for example, by the arrangement of additional sealing means, such as a sealing ring.
- the membrane arranged in the cover or cover is a waterproof or water-repellent pressure compensation membrane, such as a filter-like fabric or structure, which is coated with a water-repellent coating based on synthetic resin, a thermoplastic, such as PVC, PUR and the like or on Is based on a silicone or PTFE. It is preferably a so-called Goretex membrane, which, as mentioned above, has a PTFE coating.
- a passage in the lid or cover is closed, which can be, for example, a hole provided with support webs, or a passage provided with a large number of small perforations.
- support webs it is advantageous if support webs offset from one another in the perforation on the front and rear are arranged so that no free passage is visible in the direction perpendicular to the cover or cover, which means that there is no direct connection perpendicular to the membrane on the back of the cover vertically incident pressure component can act.
- the device proposed according to the invention is particularly suitable for measuring devices in a wet or moist environment or for under water, where at least the ambient pressure, such as, for example, the air pressure, or the water pressure under water can also be determined.
- the ambient pressure such as, for example, the air pressure, or the water pressure under water
- other measuring sensors can of course be provided, for example for determining the temperature, the air humidity, the wind speed, for satellite navigation, as a compass, as an altimeter, etc.
- a weighing device for example which can be pulled out or folded out, can be provided in order to achieve this. suitable measuring device for weighing at least smaller resp. easier to use objects.
- the various measured or ascertained physical quantities can be displayed, for example, by means of a so-called LCD display, in which case a menu control can also be arranged in the measuring device so that it is possible to switch between displays of the different measured quantities.
- a great advantage of the measuring device proposed according to the invention is that in the event of a defective membrane, only the cover, such as the battery cover, can be replaced, and the measuring device is once again fully functional. Furthermore, the same housings can be used both for watertight devices and for devices that are not to be equipped with watertightness. In the latter case, an ordinary cover, such as a battery cover, can be used, not containing the pressure compensation membrane proposed according to the invention.
- Another advantage is that, for example, the pressure sensor can be arranged anywhere in the housing, since it is known that the same pressure conditions prevail in the entire interior of the housing as in the environment. An arrangement just behind the membrane is therefore not necessary.
- La, lb a waterproof measuring device, for example suitable for use in water sports, seen both in perspective front view and in perspective from the back,
- FIG. 3 the lid of FIG. 2 seen in perspective from the rear
- Fig. 5 shows schematically the manufacture of the passage in the lid according to Figs. 2-4, suitable for arranging a water-impermeable pressure compensation membrane.
- FIGS. 1 a and 1 b each show a measuring device according to the invention, viewed from the front and from the rear, for example suitable for the implementation of water sports.
- FIG. 1 a shows a perspective view from the front of the measuring device 1, on which front cover a display 9 shows - is for displaying the physical quantities measured by means of the device 1.
- An anemometer 7 is representative of various measuring sensors and is shown in a recognizable manner.
- the measuring device can be switched on and off by means of a button 11, and various displays can be selected by means of a menu button 13.
- the display according to FIG. 1 a shows the ambient temperature on the one hand and the lowest temperature determined in this measurement period.
- This measuring device can be kept worn around the neck, for example, via a hanging cord 15.
- FIG. 1b shows the rear side 5 of the measuring device, having a cover 17, which may be, for example, the battery cover.
- a cover 17 which may be, for example, the battery cover.
- this cover can be loosened and removed from the housing by means of a screwing movement.
- a battery arranged under the cover 17 can be replaced when it is used up.
- the cover 17 is shown in a top view in enlargement, the central groove 19 again being recognizable, and the passage 21.
- parallel retaining webs 23 can be seen, which prevent an excessively large pressure area from acting on the membrane.
- An annular groove 22 is provided in the peripheral cover wall, into which, for example, a rubber seal can be arranged so that the cover is attached to the housing of the measuring device 1 in a watertight manner. can be arranged.
- bayonet hooks 31 can be seen, which serve to hold the cover on the housing.
- FIG. 3 shows the cover 17 seen from the rear, again the passage 21 and holding webs 25, between which webs openings can be seen.
- the water-impermeable pressure compensation membrane 27 proposed according to the invention is arranged in a recess in the passage 21 and can be firmly connected to the cover wall, for example by gluing. Of course, it is also possible to attach a plug ring peripherally to fix the membrane.
- the cover 17 is shown in cross-section in FIG. 4, it now being recognizable that the webs 23 and webs 25 or the corresponding openings are arranged offset from one another, so that the membrane 27, as seen perpendicularly to the surface of the lid, is not visible . This means that no vertical pressure component directly impacting the cover acts on the membrane, which can prevent damage to the membrane, for example, in the event of rapid pressure changes.
- the effective clear passage 24 for pressure equalization takes place in the direction parallel to the cover 17.
- FIG. 5 schematically shows the manufacture of the openings or the webs 23 and 25, in that these openings are produced by means of punching tools 35 and 37 and stamp contours 36 and 38 offset from one another.
- the cover or the decorative be dimensioned or configured in any manner in the housing of the measuring device.
- it can be a screw cap, a cover held by means of a bayonet lock, a clip-on cover or a cover which is held on or in the housing wall by means of snap or clamping devices.
- the cover can thus be round, square, oval, depending on requirements, preferably further sealing means are arranged on the cover, such as rubber seals and the like, so that a watertight closure of the housing interior is ensured.
- Both the housing of the measuring device and the cover can be made of metal as well as of any suitable plastic.
- the membrane embedded in the lid can also be any water-impermeable, but gas and / or water vapor permeable membrane. It is essential that the interior of the housing is perfectly protected against the ingress of water.
- the membrane can be made of any material, such as any filter-like or non-woven material, such as in particular a filter fabric, which is provided with a suitable, water-repellent coating. Synthetic resins such as acrylic resins and thermoplastic materials such as PVC, polyurethanes and the like are particularly suitable for water-repellent finishing of such membranes. Silicone equipment is also possible or coating with
- Fluoroethylene polymers such as PTFE.
- the material known under the brand "Goretex” is particularly suitable.
- the device according to the invention can be a measuring device for determining any physical measurement quantity, such as, for example, a thermometer, a barometer. ter, an altimeter, a satellite navigation device, a hygrometer, etc.
- a measuring device for determining any physical measurement quantity such as, for example, a thermometer, a barometer. ter, an altimeter, a satellite navigation device, a hygrometer, etc.
- the advantage of the measuring device according to the invention is that the inside of the housing largely has the same pressure conditions as in the environment, so that the ambient pressure can be measured or can be determined.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU13711/00A AU1371100A (en) | 1998-12-23 | 1999-12-07 | Water-tight measurement device |
EP99973549A EP1169620A1 (en) | 1998-12-23 | 1999-12-07 | Water-tight measurement device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2545/98 | 1998-12-23 | ||
CH254598 | 1998-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000039533A1 true WO2000039533A1 (en) | 2000-07-06 |
Family
ID=4236212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH1999/000584 WO2000039533A1 (en) | 1998-12-23 | 1999-12-07 | Water-tight measurement device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1169620A1 (en) |
AU (1) | AU1371100A (en) |
WO (1) | WO2000039533A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011109740A2 (en) | 2010-03-05 | 2011-09-09 | Ysi Incorporated | Underwater sensor apparatus |
CN106404221A (en) * | 2016-11-15 | 2017-02-15 | 洛阳市大米电子科技有限公司 | Portable temperature detection instrument |
CN106441448A (en) * | 2016-11-15 | 2017-02-22 | 洛阳市大米电子科技有限公司 | Instrument for detecting temperature, humidity, oxygen concentration and gas pressure |
EP3467444A1 (en) * | 2017-10-04 | 2019-04-10 | Niko NV | Watertightness of sensors |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4196623A (en) * | 1978-07-28 | 1980-04-08 | Carlo Alinari | Depth gauges |
JPS55128114A (en) * | 1979-03-28 | 1980-10-03 | Citizen Watch Co Ltd | Water pressure detector of depth gage |
DE3919405A1 (en) * | 1989-06-14 | 1990-12-20 | Heinz Faulhammer | Container esp. for perishable food - has membrane bowing if internal pressure increases to indicate decay of contents |
US5712428A (en) * | 1995-08-01 | 1998-01-27 | Endress & Hauser Gmbh | Pressure sensor with a solid to minimize temperature-related measurement error |
-
1999
- 1999-12-07 WO PCT/CH1999/000584 patent/WO2000039533A1/en not_active Application Discontinuation
- 1999-12-07 EP EP99973549A patent/EP1169620A1/en not_active Withdrawn
- 1999-12-07 AU AU13711/00A patent/AU1371100A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4196623A (en) * | 1978-07-28 | 1980-04-08 | Carlo Alinari | Depth gauges |
JPS55128114A (en) * | 1979-03-28 | 1980-10-03 | Citizen Watch Co Ltd | Water pressure detector of depth gage |
DE3919405A1 (en) * | 1989-06-14 | 1990-12-20 | Heinz Faulhammer | Container esp. for perishable food - has membrane bowing if internal pressure increases to indicate decay of contents |
US5712428A (en) * | 1995-08-01 | 1998-01-27 | Endress & Hauser Gmbh | Pressure sensor with a solid to minimize temperature-related measurement error |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 004, no. 184 (P - 041) 18 December 1980 (1980-12-18) * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011109740A2 (en) | 2010-03-05 | 2011-09-09 | Ysi Incorporated | Underwater sensor apparatus |
EP2542923A4 (en) * | 2010-03-05 | 2016-06-15 | Ysi Inc | Underwater sensor apparatus |
CN106404221A (en) * | 2016-11-15 | 2017-02-15 | 洛阳市大米电子科技有限公司 | Portable temperature detection instrument |
CN106441448A (en) * | 2016-11-15 | 2017-02-22 | 洛阳市大米电子科技有限公司 | Instrument for detecting temperature, humidity, oxygen concentration and gas pressure |
EP3467444A1 (en) * | 2017-10-04 | 2019-04-10 | Niko NV | Watertightness of sensors |
BE1025671B1 (en) * | 2017-10-04 | 2019-05-29 | Niko Nv | Waterproofness of sensors |
Also Published As
Publication number | Publication date |
---|---|
EP1169620A1 (en) | 2002-01-09 |
AU1371100A (en) | 2000-07-31 |
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