WO2001086310A1 - Digital meter for measuring alternating current - Google Patents
Digital meter for measuring alternating current Download PDFInfo
- Publication number
- WO2001086310A1 WO2001086310A1 PCT/US2000/006696 US0006696W WO0186310A1 WO 2001086310 A1 WO2001086310 A1 WO 2001086310A1 US 0006696 W US0006696 W US 0006696W WO 0186310 A1 WO0186310 A1 WO 0186310A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ught
- signal
- digital
- alternating current
- recited
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
-
- 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
- G01D4/00—Tariff metering apparatus
- G01D4/002—Remote reading of utility meters
- G01D4/004—Remote reading of utility meters to a fixed location
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/16—Adaptations of counters to electricity meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/36—Induction meters, e.g. Ferraris meters
- G01R11/38—Induction meters, e.g. Ferraris meters for single-phase operation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
Definitions
- the present invention relates generally to a structure of an alternating current meter for measuring the power consumption, and more particularly to an electronic digital measuring structure of the alternating current meter, which is capable of converting the power consumption rate of a power user into a digital signal output. A precision measurement of the power consumption is thus made possible by the digital signal output.
- the induction- type alternating current meter is a principal instrument which is used by the power company to measure the power consumption by a power user.
- the collection of the power consumption data by the power company is done by a person who is hired by the power company to read the meter on site.
- Such a general practice as described above is not cost-effective and is inefficient at best in view of the fact that the wages and the fringe benefits of the meter-person give an added a ⁇ _lministrative cost, and that the manual reading of the power meter by the meter- person is apt to be erroneous.
- a prior art alternating current meter 10 comprises a voltage magnet 11 capable of generating a movable magnetic field, and a metal disk 12 which is located over the voltage magnet 11 such that the metal disk 12 is induced by the movable magnetic field to turn.
- a center shaft 13 of the metal disk 12 actuated to turn by the metal disk 12 in motion.
- One of tow gears 151 of a counter 15 is meshed with a worm rod 14 which is mounted on the center shaft 13 such that the worm rod 14 turns along with the center shaft 13.
- the numerical reading is shown by the counter 15 as a result of the cumulative measuring and switching, which are attained by a plurality of gear trains of the counter 15.
- the numerical reading shown by the counter 15 of the meter 10 is not a reliable reflection of the actual power consumption.
- the digital meter comprises a light- emitting element and a light sensor for conversion of a power consumption rate into a digital signal, which is then processed by a processing unit such that the power consumption is expressed in various forms, such as watts, cash value, etc.
- the digital meter is electronically linked with a local area network via which the power company gathers the power consumption data of a power user without the use of a meter-person.
- FIG.1 shows a front view of an induction-type wattmeter of the prior art.
- FIG.2 shows a sectional schematic view of an induction-type wattmeter of the prior art.
- FIG.3 shows a sectional schematic view of the present invention.
- FIG.4 shows another sectional schematic view of the present invention.
- FIG.5 shows a circuit block diagram of a signal conversion display of the present invention.
- FIG.6 shows a flow chart of operation of the present invention.
- a digital meter for measuring alternating current comprises a housing 10', a metal rotary disk 20, a Hght-emitting element 30, a light-sensing element 40, a signal wire 50, and a signal conversion display 60.
- the housing 10' is provided in the interior thereof with a voltage magnet 11,
- the metal rotary disk 20 is mounted over the voltage magnet 11 and provided with a vertical through hole 21, or one or more vertical through holes 21', as shown in FIG 4.
- the metal rotary disk 20 is mounted on a shaft 22 which is pivoted at the bottom end to the housing 10', as shown by the imaginary lines in FIG 3.
- the metal rotary disk 20 is induced by a magnetic field of the voltage magnet 11 to turn. As a result, the shaft 22 turns along with the rotary disk 20.
- the Ught-emitting element 30 and the Ught- sensing element 40 are fixed on the housing 10' such that the Ught-emitting element 30 is corresponding in location to one surface of the metal rotary disk 20, and that the Ught-emitting element30 is separated from the metal rotary disk 20 by a predetermined distance.
- the Ught-emitted 30 by a Ught-emitting end 31 of the Ught-emitting element 30 is projected on the rotational path of the vertical through hole 21.
- the Ught-sensing element 40 is opposite to other surface fo the rotary disk 20 and is separated from the metal rotary disk 20 by a predetermined distance.
- the Ught-receiving end 41 of the Ught-sensing element 40 is corresponding in location to the Ught-emitting end 31 of the Ught-emitting element 30.
- the signal wire 50 is connected at one end with a signal output end 42 of the Ught-emitting element 40 such that the signal wire 50 is connected at other end thereof with the signal conversion display 60 which is fixed in the interior of the housing 10* for receiving the Ught signal of the signal wire 50.
- the Ught signal is then converted into a numerical value of power consumption.
- the signal conversion display 60 comprises a digital counting unit 61, a single-chip microprocessing unit 62, and a digital display unit 63.
- the digital counting unit 61 is connected to the signal wire 50 for converting the Ught signal of the Ught-sensing element 40 into a digital signal, which is then decoded before being sent to the single-chip microprocessing unit 62 for conversion into the numerical value of power consumption.
- the memory of the single-chip microprocessing unit 62 is provided with a control software for controlling the entire flow process of the signal conversion display 60. The control may be replaced by a microcomputer chip.
- the digital display unit 63 is connected to the single-chip microprocessing unit 62 for displaying the numerical value of power consumption.
- the metal rotary disk 20 is induced by the magnetic field of the voltage magnet 11 to rotate.
- the Ught emitted by the Ught-emitting end 31 of the Ught-emitting element 30 is continuously projected on the surface of the metal rotary disk 20.
- the through hole 21 of the metal rotary disk 20 is turned to the position of the Ught- emitting element 30, the Ught emitted by the Ught-emitting end 31 is received once by the Ught-receiving end 41 of the Ught-sensing element 40 via the through hole 21 of the metal rotary disk 20.
- the Ught signal emitted by the Ught-emitting element 30 is obstructed by the metal rotary disk 20, thereby resulting in the interruption in the signal-receiving by the Ught-sensing element 40.
- the Ught-sensing element 40 receives once the Ught signal.
- the Ught-sensing element 40 receives continuously the Ught signal, which is converted into a digitized signal.
- the digitized signal is transmitted to the signal conversion display 60 via the signal wire 50.
- the counting is brought about by the digital counting unit 61.
- the signal is transmitted to the single- chip microprocessing unit 62 in which the cumulative numerical value is converted into a numerical value of power consumption, which is then exhibited on the digital display unit 63.
- the digital display unit 63 may be a Ught emitting diode (LED) or a Uquid crystal display (LCD).
- a paraUel serial conversion unit 64 is connected to the single-chip microprocessing unit 62 which transmits data in a paraUel manner so as to enable the paraUel serial conversion unit 64 to receive the serial data at the time when the single-chip microprocessing unit 62 transmits the signal to the digital display unit 63.
- the paraUel serial data received by the paraUel serial conversion unit 64 are subsequently transmitted via the telecommunication network or other types of data transmitting network to the terminal located at the power company.
- a keyboard 65 is connected to the single-chip microprocessing unit 62 to faciUtate a variety of resets of the single-chip microprocessing unit 62.
- the keyboard 65 may be replaced by a touch switch.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0225361A GB2378768B (en) | 2000-05-05 | 2000-05-05 | Digital meter for measuring alternating current |
AU2000249712A AU2000249712A1 (en) | 2000-05-05 | 2000-05-05 | Digital meter for measuring alternating current |
JP2001583202A JP2003532901A (en) | 2000-05-05 | 2000-05-05 | Digital watt-hour meter |
CA002408056A CA2408056A1 (en) | 2000-05-05 | 2000-05-05 | Digital meter for measuring alternating current |
PCT/US2000/006696 WO2001086310A1 (en) | 2000-05-05 | 2000-05-05 | Digital meter for measuring alternating current |
DE10085470T DE10085470T1 (en) | 2000-05-05 | 2000-05-05 | Digital electricity meter for measuring alternating current |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2000/006696 WO2001086310A1 (en) | 2000-05-05 | 2000-05-05 | Digital meter for measuring alternating current |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001086310A1 true WO2001086310A1 (en) | 2001-11-15 |
Family
ID=21741153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/006696 WO2001086310A1 (en) | 2000-05-05 | 2000-05-05 | Digital meter for measuring alternating current |
Country Status (6)
Country | Link |
---|---|
JP (1) | JP2003532901A (en) |
AU (1) | AU2000249712A1 (en) |
CA (1) | CA2408056A1 (en) |
DE (1) | DE10085470T1 (en) |
GB (1) | GB2378768B (en) |
WO (1) | WO2001086310A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3602703A (en) * | 1969-10-20 | 1971-08-31 | Ibm | Power demand predicting control system |
US4034292A (en) * | 1976-02-18 | 1977-07-05 | Westinghouse Electric Corporation | Direction sensitive opto-electronic pulse initiator for electrical meters |
US4301508A (en) * | 1979-03-28 | 1981-11-17 | Eaton Corp. | Digital processing system for time-of-day and demand meter display |
US4652855A (en) * | 1984-12-05 | 1987-03-24 | Westinghouse Electric Corp. | Portable remote meter reading apparatus |
US6026355A (en) * | 1996-09-18 | 2000-02-15 | Itron, Inc. | Solid state watt-hour meter using GMR sensor |
-
2000
- 2000-05-05 AU AU2000249712A patent/AU2000249712A1/en not_active Abandoned
- 2000-05-05 DE DE10085470T patent/DE10085470T1/en not_active Ceased
- 2000-05-05 GB GB0225361A patent/GB2378768B/en not_active Expired - Fee Related
- 2000-05-05 WO PCT/US2000/006696 patent/WO2001086310A1/en active Application Filing
- 2000-05-05 CA CA002408056A patent/CA2408056A1/en not_active Abandoned
- 2000-05-05 JP JP2001583202A patent/JP2003532901A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3602703A (en) * | 1969-10-20 | 1971-08-31 | Ibm | Power demand predicting control system |
US4034292A (en) * | 1976-02-18 | 1977-07-05 | Westinghouse Electric Corporation | Direction sensitive opto-electronic pulse initiator for electrical meters |
US4301508A (en) * | 1979-03-28 | 1981-11-17 | Eaton Corp. | Digital processing system for time-of-day and demand meter display |
US4652855A (en) * | 1984-12-05 | 1987-03-24 | Westinghouse Electric Corp. | Portable remote meter reading apparatus |
US6026355A (en) * | 1996-09-18 | 2000-02-15 | Itron, Inc. | Solid state watt-hour meter using GMR sensor |
Also Published As
Publication number | Publication date |
---|---|
GB2378768B (en) | 2004-03-24 |
JP2003532901A (en) | 2003-11-05 |
AU2000249712A1 (en) | 2001-11-20 |
CA2408056A1 (en) | 2001-11-15 |
GB0225361D0 (en) | 2002-12-11 |
DE10085470T1 (en) | 2003-05-08 |
GB2378768A (en) | 2003-02-19 |
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