WO2012072560A1 - Manometer with light guide, monitoring device and gas distribution device equipped with the manometer - Google Patents

Manometer with light guide, monitoring device and gas distribution device equipped with the manometer Download PDF

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Publication number
WO2012072560A1
WO2012072560A1 PCT/EP2011/071136 EP2011071136W WO2012072560A1 WO 2012072560 A1 WO2012072560 A1 WO 2012072560A1 EP 2011071136 W EP2011071136 W EP 2011071136W WO 2012072560 A1 WO2012072560 A1 WO 2012072560A1
Authority
WO
WIPO (PCT)
Prior art keywords
display
light guide
characterized
gas
manometer
Prior art date
Application number
PCT/EP2011/071136
Other languages
French (fr)
Inventor
Michel Antoine
Original Assignee
Luxembourg Patent Company S.A.
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 LU91760A priority Critical patent/LU91760A1/en
Priority to LU91760 priority
Application filed by Luxembourg Patent Company S.A. filed Critical Luxembourg Patent Company S.A.
Publication of WO2012072560A1 publication Critical patent/WO2012072560A1/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING 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
    • G01D11/00Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/28Structurally-combined illuminating devices
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING 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
    • G01D11/00Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/30Supports specially adapted for an instrument; Supports specially adapted for a set of instruments
    • G01D11/305Panel mounting of instruments
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING 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
    • G01D7/00Indicating measured values
    • G01D7/005Indication of measured value by colour change

Abstract

The invention deals with a display comprising a manometer 4 of the common type and a light guide 6 of annular cross section disposed around the housing of the manometer in such a way as to emit a luminous signalling radiation around the manometer and essentially directed towards an observer of said manometer. The display is intended to be integrated into a display surface 18 in such a way as to allow optimal visualization of the information. The activation of the light guide is dependent on electrical signals reflecting a binary state such as in particular the exceeding of a pressure threshold or the detecting of a valve or any control member in a given position. The light guide can comprise one or more luminous sources of different colours. The invention also deals with a device for distributing gas and a monitoring device for such a distributing device, equipped with one or more displays according to the invention.

Description

 Description

 MANOMETER WITH LIGHT GUIDE, CONTROL DEVICE AND GAS DISTRIBUTION DEVICE EQUIPPED WITH THE MANOMETER

 Technical area

 The invention relates to a measured physical magnitude display. More specifically, the invention relates to such a display with a dial and a needle. The invention also relates to a device for controlling a gas distribution network or device for industrial applications and more particularly for medical applications. The invention also relates to a gas distribution device.

 Prior art

 US Patent 534,695 discloses a mechanical needle display of the instrument panel type of an aircraft, in particular of the type actuated by the pressure of a fluid. This display comprises a ring-shaped light guide disposed directly above the edge of the housing at the height of the dial so as to radially diffuse on the dial the light of a light source of the incandescent bulb type arranged laterally. This teaching aims to provide a backlighting of the dial of the instrument while ensuring a certain tightness. In the field of industrial and / or medical gas distribution, such a display is of little use because the backlight is not particularly useful for applications in fixed installations in buildings sheltered from the weather and normally provided with adequate lighting.

DE 1 126 436 discloses a device for dispensing gas from sources with limited capacity, intended to ensure a continuous supply of gas. To this end, the dispensing device comprises two separate gas sources, such as packs of bottles connected and connected together and transportable as a unit. The device also includes a three-way valve for connecting the outlet to the first gas source or the second gas source selectively. A regulator is provided upstream of the three-way valve for each gas source so that the pressure of the gas is relaxed before passing through the three-way valve. A pressure sensor is provided at each of the two pressurized gas inlets so as to detect a too low pressure and supply a light. The three-way valve has the ability to switch automatically when the pressure at the operating gas source becomes too low. A valve spool position sensor is provided and is connected to two additional indicator lamps providing information on the valve status and hence the gas source being operated. This device although of rather old design (1958) has many advantages in terms of automation and reliability. However, it has a disadvantage in the signaling of the state of gas sources as well as that in service. Indeed, these different states are indicated by the four witnesses mentioned above which then require a description on the bulletin board to allow a seamless interpretation by the maintenance staff of the device. In some industrial applications, and more particularly in medical applications such as hospitals, the supply of gas is a critical service that can in no case be faulty. Since this type of device is subject to the replacement or regular filling of gas sources, monitoring of the condition of the sources as well as the identification of the source in service are essential elements for maintenance personnel. The patent document US 2004/0074540 A1 discloses, similarly to the previous document, a device for dispensing gas from two sources with limited capacity, intended to ensure a continuous supply of gas. Similar to the device of the preceding document, it comprises a three-way valve for selectively connecting the outlet with one of the two gas sources. The information display board includes a single digital pressure display and three indicator lights for each source: a first indicating that the source is in service, a second indicating that the source in question is in standby and a third indicating that the source in question is empty. It also includes a source selection switch whose pressure is displayed on the digital display, as well as a source priority selection switch to put into service. Although this document is much more recent (2003) than the previous one (1958), it is to note that the information display, although improved in particular by the presence of the witnesses to the left and to the right respectively of the display digital, remains basic because it always requires reading by the maintenance staff of the nomenclature of the various witnesses.

Summary of the invention

 The invention aims to provide a display of information relating to measured physical quantities that solves at least one of the aforementioned problems. More particularly, the object of the invention is to propose an information display device which is simple and intuitive.

 The invention relates to a display of a measured physical quantity, comprising: a display dial; a moving needle relative to the dial; means capable of moving the needle relative to the dial as a function of the measured physical quantity; a housing enclosing the dial, the needle and the means for moving the needle; notable in that it further comprises a light guide with at least one light source, the guide being disposed around the housing and configured to emit a signaling light radiation directed to an observer of the display dial and the needle.

 According to an advantageous embodiment of the invention, the light guide is of generally annular section, preferably circular.

 According to another advantageous embodiment of the invention, the light guide is adjacent to the outer surface of the housing.

 According to yet another advantageous embodiment of the invention, the light guide is configured and arranged so that the housing forms a screen between the light guide and the dial.

According to yet another advantageous embodiment of the invention, the light guide forms a cavity in which the housing is housed. According to yet another advantageous embodiment of the invention, the display comprises at least one light source disposed at the rear of the light guide.

 According to yet another advantageous embodiment of the invention, the light guide is configured and arranged relative to the housing so that the end of its surface visible by an observer of the display dial does not exceed, preferentially flush with the corresponding edge of the housing.

 According to yet another advantageous embodiment of the invention, the light guide is generally cylindrical.

 According to yet another advantageous embodiment of the invention, the display comprises several light sources of different colors.

 The invention also relates to a device for controlling a gas distribution network comprising: a display surface, at least one needle gauge disposed on said surface, indicating the gas pressure prevailing at a location; defined network; remarkable in that the gauge is a display as described above.

 According to an advantageous embodiment of the invention, the device comprises a control unit of the light source (s) of the light guide according to a state of the distribution network associated with the pressure value displayed by the pressure gauge.

 According to another advantageous embodiment of the invention, the control unit is configured to supply the light source or at least one of the light sources of the pressure gauge when the gas whose pressure is displayed by the gauge in question is in use. .

 According to yet another advantageous embodiment of the invention, the manometer comprises at least two light sources of different colors, and the control unit is configured to change the signaling color of the manometer when a distribution network parameter between in a critical area.

The invention also relates to a gas distribution device comprising: a display surface; a first inlet of a first source of gas under pressure; a first manometer arranged on the display surface, indicating the pressure at the first inlet; a second inlet of a second source of pressurized gas; a second pressure gauge disposed on the display surface indicating the pressure at the first inlet; a gas outlet; a three-way valve connecting the gas outlet with the first inlet or the second inlet, selectively; remarkable in that the first and second manometer are displays as described above; and in that it further comprises a light source control unit of the first and second manometers configured to supply the light source (s) of the first or second manometer corresponding to the gas source in connection with the output.

 According to an advantageous embodiment of the invention, the light source control unit comprises a position detector of the three-way valve.

 According to another advantageous embodiment of the invention, at least one of the first and second manometers comprises at least two light sources of different colors, and in that the control unit is configured to change the signaling color when the pressure of the operating gas source falls below a limit value.

 Brief description of the drawings

 Figure 1 is a perspective view of a display of a measured physical quantity such as a pressure, according to the invention.

 Figure 2 is a sectional view of the display of Figure 1.

Figure 3 is a bottom view of the light guide of the display of Figures 1 and 2.

 Figure 4 is a perspective view of a display according to the invention, integrated in a display surface.

Figure 5 is a schematic illustration of a gas distribution device according to the invention.

[0027] FIG. 6 is a block diagram of the device of FIG. 5.

Description of the embodiments The display 2 illustrated in Figure 1 essentially comprises a display or instrument dial 4 surrounded by a light guide 6. The dial instrument 4 essentially and conventionally comprises a generally cylindrical housing 5 enclosing a dial 8, a needle 10 movable in rotation relative to the dial and means for moving the needle according to the measured physical quantity. In the current case of a manometer of the Bourdon type, these means are purely mechanical and comprise a helical tube whose one end is closed and free of its displacements and the other end is fixed and connected to the chamber or the duct whose pressure must be measured. As the pressure to be measured increases, the tube tends to unwind as it decreases the tube tends to curl further. This movement is transmitted by a mechanical connection to a gear system connected to a needle. The needle is placed in front of a dial showing the value of the pressure relative to the position of the needle.

 It should be noted that all types of dial displays can also be used as including magnetic and electromagnetic displays.

 The light guide is further illustrated in Figures 2 and 3. Figure 2 is a sectional view of the display of Figure 1 along a plane passing through the longitudinal axis. The dial instrument 4 is not shown in section. It can be seen that the light guide is generally cylindrical with a front edge disposed approximately at the front edge of the housing 5 of the dial instrument 4. Light sources 12 such as light emitting diodes (LEDs) are arranged at the back of the cylindrical wall of the light guide. These leds are arranged on a support 14 of the platinum type for electronic components. The light emitted by these LEDs will be transmitted substantially longitudinally along the wall of the guide by successive reflections on the wall and then out at the level of the edge or front edge.

The front edge is preferably provided with a flange 7 to bear against a display surface. The light guide 6 is preferably transparent plastic material such as for example polycarbonate. The propagation of light is based on the principle of total reflection. In the case of a polycarbonate light guide, the latter has a refractive index of the order of 1.6 while the surrounding air has an index of the order of 1. The interface polycarbonate / air is a dioptre on which the incident rays propagating in the polycarbonate will be successively reflected until encountering a surface such as for example the exit surface with an angle less than the limit angle of total reflection (Snell-Descartes law). These rays will then be refracted and exit the light guide.

 In Figure 3, we can see the back side of the light guide having a series of semicircular slots for housing the LEDs and to promote the entry of light into the wall of the guide.

 It should be noted that the light guide 6 can take various forms other than that illustrated in Figures 1 to 3. In particular, the rear portion can be drawn differently while allowing the transmission of light from one or more sources bright. The rear portion may in fact have a bottom for receiving the light source or sources. The generally cylindrical portion can taper conically backwards. However, it will be important to ensure that the geometry of the light guide ensures a satisfactory transmission of light from a rear portion of the guide (and the display) to its front portion.

The light guide preferably has a closed annular section at the height of the display dial. It may, however, also have an opening that can in particular facilitate its mounting on the housing of the dial display. A slight clearance can be provided between the housing and the annular portion of the light guide at their front parts, that is to say the parts visible by an observer of the display. It is indeed preferable that the light guide matches the outer contour of the housing including its front and visible so that its illumination is well associated with the information of the display. Figure 4 is a perspective illustration of the display of Figures 1 to 3 when integrated in a display surface 18. It can be seen that the light guide 6 forms a light ring surrounding the housing containing the dial, the needle and the movement mechanism of the needle. The light ring is flush with the top edge of the case. The light ring does not participate in the illumination of the dial, at least not in a direct way and thus plays an exclusive role of operating witness.

 A gas distribution device 100 equipped with several displays as described above is illustrated in Figures 5 and 6. It is a gas distribution device from two sources with limited capacity, for to ensure the continuous availability of gas. For this purpose, two separate gas sources 102 and 104 are connected to the device 100. These gas sources can be for example packs of bottles connected and connected together and transportable as a unit. The device comprises two high-pressure gas inlets 108 and a low-pressure outlet 1 12. It also comprises a three-way valve 1 10 intended to selectively connect the outlet 1 12 with one or the other of the two inputs. 108. A pressure reducer 106 is provided in each branch connecting one of the two inputs 108 to the three-way valve 1 10. This measurement allows the latter to work at a reduced pressure with respect to the pressure of the gas sources.

 The automatic tilting of the three-way valve from one position to another can be operated in several ways. It can be operated electrically or by pressure difference between the two gas sources. Means for holding the valve in the new position may be provided, for example, in the case of a slide valve, an upper section at each end, this section cooperating sealingly with a housing when the drawer is moved to this dwelling.

Each branch connecting each of the inputs 108 with the three-way valve is connected to a pressure display of the pressure gauge type 120, 124. Each of these manometers is housed in a light guide such as previously described. Electrical connections connect the three-way valve 110 with a control unit 116 of the illumination of the light guides of the pressure gauges 120 and 124. This control unit detects the position of the three-way valve 110 and illuminates the signaling ring of the manometer corresponding to the gas source in service.

 The light guides of the manometers 120 and 124 may each be equipped with light sources of different colors, such as for example one or more green light sources and one or more red light sources or a light source. or multiple polychromatic light sources in green and red (ie able to illuminate in different colors, especially green and red). The control unit 116 can then also be configured to supply these light sources also according to the pressure detected at the gas sources. Indeed, the control unit can also be electrically connected via connections 17 to pressure sensors arranged at the high pressure inlet 108. These sensors can then send a signal to the control unit 116 when the pressure in one of the gas sources passes below a predetermined threshold. In this case, the control unit will control the illumination of the light source (s) of the light guide of the manometer corresponding to this gas source so as to illuminate the light guide in red. In this way the user of the dispensing device will have his attention drawn to the manometer indicating a critical pressure corresponding for example to the need for filling or replacement.

 The illumination or the illumination of the manometers according to several colors allows a visualization of the operating state of the device which is optimal.

It should be noted that the embodiment illustrated in FIGS. 5 and 6 is purely illustrative of the advantages conferred by the display illustrated in FIGS. 1 to 4. In fact, other configurations of gas distribution device setting out One or more displays according to FIGS. 1 to 4 are conceivable. In addition, the control unit of the device of FIGS. and 6 may be external and integrate more functions relating to other equipment that may also be equipped with display (s) according to the invention.

Claims

Display of a measured physical quantity, comprising:
a display dial (8);
a needle (10) movable relative to the dial;
means capable of moving the needle relative to the dial as a function of the measured physical quantity;
a housing (5) enclosing the dial, the needle and the means for moving the needle;
characterized in that it further comprises;
a light guide (6) with at least one light source (12), the guide being arranged around the housing (5) and configured to emit a signaling light directed towards an observer of the display dial and the hand .
Display according to claim 1, characterized in that the light guide (6) is of generally annular section, preferably circular.
Display according to one of claims 1 and 2, characterized in that the light guide (6) is adjacent to the outer surface of the housing (5).
Display according to one of claims 1 to 3, characterized in that the light guide (6) is configured and arranged in such a way that the housing (5) forms a screen between the light guide (6) and the dial ( 8).
Display according to one of claims 1 to 4, characterized in that the light guide (6) forms a cavity in which the housing is housed.
Display according to claim 5, characterized in that it comprises at least one light source (12) disposed at the rear of the light guide.
Display according to one of claims 1 to 6, characterized in that the light guide (6) is configured and arranged with respect to the housing (5) so that the end of its surface is visible by an observer of the dial display (8) does not protrude, preferably flush with the corresponding edge of the housing (5).
8. Display according to one of claims 1 to 7, characterized in that the light guide (6) is generally cylindrical.
9. Display according to one of claims 1 to 8, characterized in that it comprises several light sources (12) of different colors.
10. A control device of a gas distribution network comprising:
 a display surface (18),
 at least one needle pressure gauge (120, 124) disposed on said surface (18), indicating the gas pressure prevailing at a defined point in the network;
 characterized in that
 the pressure gauge (120, 124) is a display unit according to one of claims 1 to 9.
11. Control device according to claim 10, characterized in that it comprises a control unit (116) of the light source (s) (12) of the light guide (6) according to a state of the distribution network. associated with the pressure value displayed by the pressure gauge (120, 124).
12. Control device according to claim 11, characterized in that the control unit (116) is configured to supply the light source or at least one of the light sources of the pressure gauge (120, 124) when the gas whose pressure is displayed by the pressure gauge (120, 124) in question is in use.
13. Control device according to claim 12, characterized in that the pressure gauge (120, 124) comprises at least two light sources of different colors, and the control unit (116) is configured to change the signaling color of the manometer when a distribution network parameter enters a critical zone.
A gas dispensing device (100) comprising:
 a display surface (118);
 a first inlet (108) of a first source of pressurized gas;
 a first pressure gauge (120) disposed on the display surface, indicating the pressure at the first inlet;
 a second inlet (108) of a second source of pressurized gas; a second pressure gauge (124) disposed on the display surface indicating the pressure at the first inlet;
 a gas outlet (112);
 a three-way valve (110) connecting the gas outlet (112) with the first inlet or the second inlet (108) selectively;
 characterized in that
 the first and second manometers (120, 124) are displays according to one of claims 1 to 9; and in that it includes, in addition
 a control unit (116) of the light sources of the first and second manometers (120, 124) configured to supply the light source (s) of the first or second manometer (120, 124) corresponding to the gas source in connection with the output.
15. Gas distribution device according to claim 14, characterized in that the control unit (116) of the light sources comprises a position detector of the three-way valve (110).
16. Gas distribution device according to one of claims 14 and 15, characterized in that at least one of the first and second manometers (120, 124) comprises at least two light sources of different colors, and in that control unit (116) is configured to change the signaling color when the pressure of the operating gas source falls below a limit value.
PCT/EP2011/071136 2010-11-29 2011-11-28 Manometer with light guide, monitoring device and gas distribution device equipped with the manometer WO2012072560A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
LU91760A LU91760A1 (en) 2010-11-29 2010-11-29 Manometer with light guide, control device and gas distribution device equipped with the manometer
LU91760 2010-11-29

Publications (1)

Publication Number Publication Date
WO2012072560A1 true WO2012072560A1 (en) 2012-06-07

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WO (1) WO2012072560A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US534695A (en) 1895-02-26 Automatic danger-signal for railroads
DE1126436B (en) 1958-07-22 1962-03-29 Draegerwerk Ag Selbsttaetige switching device for controlling the compressed gas supply of two parallel connected Druckgasvorratsbehaeltern
EP1319553A1 (en) * 2001-12-14 2003-06-18 Visteon Global Technologies, Inc. Vehicle instrument
US20040074540A1 (en) 2002-03-06 2004-04-22 Pearson Ronald W. System for monitoring and operating valve manifolds and method therefore
US20060215384A1 (en) * 2005-03-28 2006-09-28 Trisco Technology Corp. [illumination structure of a meter]
US7159608B1 (en) * 2002-11-07 2007-01-09 Tri-Tech Medical Inc. Manifold system and method for compressed medical gases
US20070186843A1 (en) * 2006-02-15 2007-08-16 Denso Corporation Display device
EP1880891A1 (en) * 2006-07-20 2008-01-23 Robert Bosch Gmbh Display device
EP2093544A2 (en) * 2008-02-19 2009-08-26 Magneti Marelli France Vehicle dashboard with peripheral trim

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US534695A (en) 1895-02-26 Automatic danger-signal for railroads
DE1126436B (en) 1958-07-22 1962-03-29 Draegerwerk Ag Selbsttaetige switching device for controlling the compressed gas supply of two parallel connected Druckgasvorratsbehaeltern
EP1319553A1 (en) * 2001-12-14 2003-06-18 Visteon Global Technologies, Inc. Vehicle instrument
US20040074540A1 (en) 2002-03-06 2004-04-22 Pearson Ronald W. System for monitoring and operating valve manifolds and method therefore
US7159608B1 (en) * 2002-11-07 2007-01-09 Tri-Tech Medical Inc. Manifold system and method for compressed medical gases
US20060215384A1 (en) * 2005-03-28 2006-09-28 Trisco Technology Corp. [illumination structure of a meter]
US20070186843A1 (en) * 2006-02-15 2007-08-16 Denso Corporation Display device
EP1880891A1 (en) * 2006-07-20 2008-01-23 Robert Bosch Gmbh Display device
EP2093544A2 (en) * 2008-02-19 2009-08-26 Magneti Marelli France Vehicle dashboard with peripheral trim

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