WO2005067124A1 - Pressurized gas to electrical energy conversion for low-power field devices - Google Patents
Pressurized gas to electrical energy conversion for low-power field devices Download PDFInfo
- Publication number
- WO2005067124A1 WO2005067124A1 PCT/US2004/041746 US2004041746W WO2005067124A1 WO 2005067124 A1 WO2005067124 A1 WO 2005067124A1 US 2004041746 W US2004041746 W US 2004041746W WO 2005067124 A1 WO2005067124 A1 WO 2005067124A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- module
- gas
- field device
- pressurized gas
- bluff body
- Prior art date
Links
- 238000006243 chemical reaction Methods 0.000 title description 3
- 238000000034 method Methods 0.000 claims abstract description 72
- 230000008569 process Effects 0.000 claims abstract description 69
- 239000007789 gas Substances 0.000 claims description 43
- 230000005611 electricity Effects 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 230000010355 oscillation Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 6
- 239000003345 natural gas Substances 0.000 claims description 4
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 claims description 3
- 239000005297 pyrex Substances 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims 6
- 239000003990 capacitor Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000004886 process control Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/185—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1892—Generators with parts oscillating or vibrating about an axis
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1462—Mounting supporting structure in casing or on frame or rack for programmable logic controllers [PLC] for automation or industrial process control
Definitions
- the present invention is related to process control and measurement field devices such as transmitters and actuators. More specifically, the present invention is related to relatively low-power field devices.
- BACKGROUND OF THE INVENTION Field devices also referred to herein as process devices, are used by the process control and measurement industry for a variety of purposes . Usually such devices have a field-hardened enclosure so that they can be installed outdoors in relatively rugged environments and are able to withstand climatalogical extremes of temperature, humidity, vibration, mechanical shock, etc. These devices also can typically operate on relatively low power. For example, field devices are currently available that receive all of their operating power from a known 4- 20 mA loop.
- Process actuators are similar to process variable transmitters in that they generally have a relatively field-hardened enclosure and communicate upon a process control and measurement loop. Process actuators, however, actually affect the process based upon signals received from the loop.
- Other field devices can include process control modules, process alarm modules, process diagnostic modules, et cetera.
- process control plants or in remote measurement stations, it is often useful to provide a transmission of the process variable data by means other than over a copper-wire process communication loop.
- a wireless communication is used for such applications.
- Temporary or add-on process variable monitoring would also benefit from a wireless installation.
- data is usually transmitted in bursts .
- relatively significant operating power is required (in excess of 100 milliwatts) .
- the device During the dwell time between the transmission bursts, the device generally goes into a low-power measurement mode consuming less than 10 milliwatts.
- the unit goes into a sleep mode between measurements. This sleep mode can have an operating power on the order of the microwatts.
- FIG. 1 is a diagrammatic view of an industrial process environment in which embodiments of the present invention are particularly useful .
- FIGS. 2 and 3 are diagrammatic view of field devices in which embodiments of the present invention are particularly useful .
- FIG. 1 is a diagrammatic view of an industrial process environment in which embodiments of the present invention are particularly useful .
- FIGS. 2 and 3 are diagrammatic view of field devices in which embodiments of the present invention are particularly useful .
- FIG. 4 is a block diagram of a process variable transmitter for which embodiments of the present invention are particularly useful.
- FIGS. 5 and 6 are diagrammatic views of a power supply module converting pressurized gas into electricity in accordance with embodiments of the present invention.
- FIG. 7 is a diagrammatic view of a field in accordance with an embodiment of the present invention.
- DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagrammatic view of a process industry installation employing a field device shown in this example as a process variable transmitter 12 physically coupled to the process and providing a wireless signal 14 indicative of at least one process variable .
- FIGS . 2 and 3 are diagrammatic views of exemplary process variable transmitters with which embodiments of the present invention are particularly useful.
- FIG. 2 illustrates temperature transmitter 12 coupled to process container (pipe) 18 such that transmitter 12 can measure the temperature of process fluid therein.
- FIG. 3 is a diagrammatic view of process fluid flow transmitter 22 coupled to process container 20, which transmitter 22 measures a differential pressure across a flow obstruction interposed within container 20 and calculates process fluid flow based upon the measured differential pressure.
- Process variable transmitters 12 and 22 are specific examples of types of field devices that can advantageously employ embodiments of the present invention. Those skilled in the art will recognize that embodiments of the present invention can be practiced with any field device including process variable transmitters, process actuators, and other suitable devices, that couples to a process.
- Embodiments of the present invention generally employ or utilize a source of pressurized gas and convert that pressurized gas to electrical energy for use by the field device.
- FIG. 4 is a diagrammatic view of a process variable transmitter, such as transmitter 12, illustrating the basic elements of the transmitter.
- Transmitter 12 is generally coupled to a process variable sensor 24 that generates a signal indicative of a process variable, such as process fluid temperature, process fluid pressure, etc.
- Sensor 24 is coupled to analog-to-digital converter 26 which converts the analog signal from sensor 24 to a digital value and passes the digital value through bus 28 to microprocessor 30.
- Microprocessor 30 executes a program, preferably stored in memory 32 and generates a process variable output signal based upon the digital value provided to microprocessor 30 through bus 28. This process variable output is provided to wireless transceiver 34, which is coupled to antenna 36. Antenna 36 and wireless transceiver 34 cooperate to provide wireless interaction with one or more suitable devices.
- wireless transceiver 24 is a transceiver that can employ either radio-frequency or optical techniques for wireless communication.
- transmitter 12 will preferably transmit data in bursts. During these transmission bursts, relatively significant operating power is required (potentially in excess of 100 milliwatts) . This is to ensure that sufficient energy is put into the wireless transmission to provide quality communication and range .
- power supply module 40 is provided. Power supply module 40 is coupled to all electrical components within process variable transmitter 12 as indicated by line 42 labeled PWR. As will be described in greater detail below, power supply module 40 is fluidically coupled to a source of pressurized gas 44 via line 46.
- the source of pressurized gas 44 and line 46 can, in some embodiments, be a part of the process variable transmitter installation such as when gas 44 is the process fluid itself.
- gas source 44 is an external tank of pressurized gas.
- remote process applications often use pneumatically actuated valves to control flow. Typically, either a compressed air source or natural gas source drives these actuators. This pressurized gas source could be utilized as gas source 44 for the field device.
- FIG. 5 is a top plan view of power supply module 40 in accordance with an embodiment to the present invention.
- Power supply module 40 includes a base 48 that is fluidically coupled (not shown) to a source of pressurized gas.
- Base 48 is formed of a material that facilitates MEMS construction, such as silicon.
- Pressurized gas fills chamber 50 and flows in the direction of arrow 52 through nozzle 53 and ultimately flows over bluff body 54 and causing cantilever member 56 to oscillate in an up and down motion (into and out of the plane of the drawing) .
- Nozzle 53 increases the efficiency of energy conversion since it causes an localized increase in gas velocity, thereby increasing the kinetic energy of the gas.
- pressurized gas include air, natural gas and process, gas.
- Cantilever member 56 may include electrical traces or conductors 58 disposed thereon and arranged to be proximate a pole 60 of a permanent magnet 62.
- conductors 58 moving within the magnetic field 64 generate an electric current along conductor 58.
- This electric current can be provided directly to power regulation circuitry for ultimate provision to components within transmitter 12, or can be coupled to an optional battery 66 (indicated in phantom in FIG. 5) .
- bluff body 54 has a triangularly shaped cross-section, as indicated in FIG.
- FIG. 6 is a front elevation view of power supply module 40 in accordance with an embodiment of the present invention.
- FIG. 6 illustrates line 46 coupling to chamber 50 which is bound on its top surface by cover layer 68 which is preferably formed of Pyrex and diffusion bonded to base 48.
- the pressurized gas passes along passageway 52, preferably through a nozzle, and flows over bluff body 54.
- the oscillation of cantilever member 56 is illustrated by double-headed vertical arrow 72.
- FIG. 7 is a diagrammatic view of a field device in accordance with another embodiment of the present invention.
- Field device 90 includes power supply module 80, which is similar to power supply module 40, illustrated in FIG. 6, and like components are numbered similarly.
- module 80 is hermetically sealed such that the pressurized gas flowing past bluff body 54, which generates the oscillation of cantilever member 56, is ultimately recaptured and passed through port 74 which is preferably coupled to the process.
- FIG. 7 illustrates module 80 being coupled to a pair of process pressure points on piping 92. As process fluid flows within piping 92, a differential pressure will exist between points 94 and 96. This differential pressure can be increased, if desired, by placing a suitable flow obstruction within piping 92 between points 94 and 96 As long as a differential pressure exists points 94 and 96, module 80 will operate.
- module 80 can be employed in a completely sealed system to generate electricity in response to process gas flowing in response to differential pressure. Additionally, since the amount of electricity generated will be related to the differential pressure observed between process pressure points 94 and 96, the amount of electricity generated in module 80 can be used as an indication of that differential pressure. The differential pressure is also related to the flow in piping 92. Thus, the electricity generated by module 80 can be used as an indication of the fluid flow rate in piping 92. Finally, since embodiments of the present invention allow field devices to be powered by pressurized gas, and provide indications of process fluid flow, embodiments of the present invention can be used to provide process powered flow sensors . All of the structures indicated on FIGS. 5 and 6 are preferably constructed from materials that facilitate MEMS fabrication.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04813989A EP1698039B1 (en) | 2003-12-22 | 2004-12-14 | Pressurized gas to electrical energy conversion for low-power field devices |
DE602004031364T DE602004031364D1 (en) | 2003-12-22 | 2004-12-14 | GAS-TO-ELECTRIC ENERGY IMPLEMENTATION FOR LOW POWER CONSUMPTION DEVICES |
JP2006547107A JP4705589B2 (en) | 2003-12-22 | 2004-12-14 | Device for converting compressed gas into electrical energy for low power devices |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/745,310 | 2003-12-22 | ||
US10/745,310 US6975043B2 (en) | 2003-12-22 | 2003-12-22 | Pressurized gas to electrical energy conversion for low-power field devices |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005067124A1 true WO2005067124A1 (en) | 2005-07-21 |
Family
ID=34679116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/041746 WO2005067124A1 (en) | 2003-12-22 | 2004-12-14 | Pressurized gas to electrical energy conversion for low-power field devices |
Country Status (7)
Country | Link |
---|---|
US (1) | US6975043B2 (en) |
EP (1) | EP1698039B1 (en) |
JP (1) | JP4705589B2 (en) |
CN (1) | CN100486080C (en) |
DE (1) | DE602004031364D1 (en) |
RU (1) | RU2329583C2 (en) |
WO (1) | WO2005067124A1 (en) |
Families Citing this family (20)
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DE10344575A1 (en) * | 2003-09-25 | 2005-04-28 | Siemens Ag | Device for transmitting data and portable electronic device and field device for such a device |
US6856113B1 (en) | 2004-05-12 | 2005-02-15 | Cube Investments Limited | Central vacuum cleaning system motor control circuit mounting post, mounting configuration, and mounting methods |
US20060081291A1 (en) * | 2004-09-09 | 2006-04-20 | Cube Investments Limited | Central vacuum cleaner wall valve, hose nipple, and cleaning system |
EP1799087A4 (en) | 2004-09-17 | 2009-08-12 | Cube Invest Ltd | Cleaner handle and cleaner handle housing sections |
CN101156294B (en) * | 2005-04-28 | 2010-12-29 | 罗斯蒙德公司 | Charging system for field devices |
US7690075B2 (en) | 2005-10-07 | 2010-04-06 | Cube Investments Limited | Central vacuum cleaner control, unit and system with contaminant sensor |
US7900315B2 (en) | 2005-10-07 | 2011-03-08 | Cube Investments Limited | Integrated central vacuum cleaner suction device and control |
US7958594B2 (en) | 2005-10-07 | 2011-06-14 | Cube Investments Limited | Central vacuum cleaner cross-controls |
CA2562810C (en) | 2005-10-07 | 2015-12-08 | Cube Investments Limited | Central vacuum cleaner multiple vacuum source control |
US7490516B2 (en) * | 2006-01-26 | 2009-02-17 | Rosemount Inc. | Manual powered process transmitter |
CN101501330B (en) * | 2006-08-14 | 2013-05-29 | 罗斯蒙德公司 | Vibration power generation |
JP5103860B2 (en) * | 2006-10-13 | 2012-12-19 | 横河電機株式会社 | Power supply |
EP2158656B1 (en) * | 2007-05-02 | 2020-10-21 | Rosemount Inc. | Process field device with battery and overcurrent protection |
US7977924B2 (en) * | 2008-11-03 | 2011-07-12 | Rosemount Inc. | Industrial process power scavenging device and method of deriving process device power from an industrial process |
WO2013012877A2 (en) * | 2011-07-18 | 2013-01-24 | Sean Hsu | Fluid flow generator |
RU2480663C1 (en) * | 2011-11-16 | 2013-04-27 | Федеральное государственное бюджетное учреждение "Национальный исследовательский центр "Курчатовский институт" | Pipeline pressure stabilisation method |
BR112014031196A2 (en) * | 2012-06-19 | 2017-06-27 | Sensus Spectrum Llc | process and device for supplying electrical metering electronics |
US9077220B2 (en) * | 2012-10-30 | 2015-07-07 | Christopher L. Kyle | Pipeline turbine generator |
US9829358B2 (en) | 2013-11-22 | 2017-11-28 | Agency For Science, Technology And Research | Device for determining a property of a fluid and method of forming the same |
US9490681B1 (en) * | 2015-09-18 | 2016-11-08 | Ingersoll-Rand Company | Pulsed air to electric generator |
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US3798475A (en) * | 1972-03-27 | 1974-03-19 | Us Army | Square wedge fluidic generator for electrical and mechanical outputs |
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2004
- 2004-12-14 EP EP04813989A patent/EP1698039B1/en not_active Not-in-force
- 2004-12-14 DE DE602004031364T patent/DE602004031364D1/en active Active
- 2004-12-14 WO PCT/US2004/041746 patent/WO2005067124A1/en active Application Filing
- 2004-12-14 JP JP2006547107A patent/JP4705589B2/en not_active Expired - Fee Related
- 2004-12-14 CN CNB2004800384805A patent/CN100486080C/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
RU2329583C2 (en) | 2008-07-20 |
EP1698039A1 (en) | 2006-09-06 |
CN100486080C (en) | 2009-05-06 |
JP4705589B2 (en) | 2011-06-22 |
JP2007515920A (en) | 2007-06-14 |
RU2006126633A (en) | 2008-01-27 |
EP1698039B1 (en) | 2011-02-09 |
DE602004031364D1 (en) | 2011-03-24 |
US6975043B2 (en) | 2005-12-13 |
CN1898850A (en) | 2007-01-17 |
US20050134047A1 (en) | 2005-06-23 |
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