EP0825577A1 - System for the remote recognition and reading of meters - Google Patents
System for the remote recognition and reading of meters Download PDFInfo
- Publication number
- EP0825577A1 EP0825577A1 EP97113140A EP97113140A EP0825577A1 EP 0825577 A1 EP0825577 A1 EP 0825577A1 EP 97113140 A EP97113140 A EP 97113140A EP 97113140 A EP97113140 A EP 97113140A EP 0825577 A1 EP0825577 A1 EP 0825577A1
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- EP
- European Patent Office
- Prior art keywords
- transreceiver
- reading
- unit
- reading device
- data
- 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.)
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Definitions
- the invention concerns a system for the remote recognition and reading of meters as set forth in the main claim.
- the invention concerns a system for remote recognition and reading which can be applied in cases where there is a need to monitor the data measured by a wide variety of meters, whether or domestic or industrial use, such as for example meters for the consumption of electrical energy, water meters, gas meters, etc.
- the state of the art covers those meters which are used to measure the consumption, either domestic or industrial, of utilities such as electricity, water, gas or other, which are suitable to display the total progressive consumption in the specific unit of measurement. These meters usually have a code to identify the apparatus which is generally printed on the containing structure; it is attributed to the user and is needed by the officials of the Utility companies in order to associate the displayed reading with the user concerned.
- the data is read and transcribed onto registers, or input into the appropriate devices, and is then processed by the Utility company in order to issue the specific bill at the pre-established dates.
- This system involves a great deal of manual work and therefore has various problems, which include: long execution times, possibility of errors, difficult access, difficulty in finding the meters etc.
- One example is water meters, which are generally located in underground pits, covered by heavy manholes, in dark places where dirt accumulates. All this causes problems, especially when the dirt accumulates on the part of the meter which is intended to be read and/or on the identification code which may also become illegible.
- meters are located on private property which is therefore only accessible when the user is present; in some cases the private property may be guarded by dogs, which may be a danger for the meter-reader.
- Another risk for the meter-reader is when the meter is to measure toxic liquids, such as for example, industrial waste, or when the meter is located in contaminated industrial environments.
- the meters can only supply an average value because the display shows a progressive, total consumption, referring to a predetermined period of time,
- the purpose of the invention is to provide a system for the remote recognition and reading of meters which is able to perform conventional reading operations automatically.
- Another purpose of the invention is to obtain a system able to perform remote operations of reading and/or writing using a transreceiver device which, while it is working, does not need its own source of power and works on a low frequency.
- a further purpose of the invention is to acquire, at a distance and automatically, a plurality of supplementary data such as, for example, consumption according to the different time bands, the date of installation and last reading, the serial numbers attributed by the builder and/or the Utility company or other data according to the specific applications to which the meter is intended.
- supplementary data such as, for example, consumption according to the different time bands, the date of installation and last reading, the serial numbers attributed by the builder and/or the Utility company or other data according to the specific applications to which the meter is intended.
- a further purpose is to obtain a system which is reliable, versatile, long-lasting, ergonomic, inexpensive and easy to use.
- the recognition and reading system substantially comprises a metering unit and a reading device which communicate to each other by means of low frequency trasmissions.
- the metering unit consists of a measuring device of a conventional type associated with a device suitable to emit pulses correlated to the measurements monitored, and of a device to acquire, process and transmit data, installed directly in cooperation with the measuring device.
- the device to acquire, process and transmit data receives the pulses as input, processes them and emits as output numerical data relating to the readings, as well as other possible information, such as for example temporal information relating to the readings.
- the numerical data can be associated and/or integrated with supplementary and/or auxiliary information such as for example, a code, a serial number, the date of installation of the metering unit, etc.
- the device to acquire, process and transmit data cooperates at least with a passive transreceiver unit, that is to say, of the type which does not require its own power supply while it is working, which is able to exchange data on a low frequency with a transreceiver on the reading device.
- a passive transreceiver unit that is to say, of the type which does not require its own power supply while it is working, which is able to exchange data on a low frequency with a transreceiver on the reading device.
- the transreceiver unit installed on the meter when it is activated by a radio-frequency field, for example generated by the transreceiver on the reading device, is able to transmit and/or receive the data memorised in the metering unit.
- transreceiver unit of this type gives a plurality of advantages: it is not necessary to supply a source of power, and therefore it can function in any site or position whatsoever; it is possible to transfer data through non conductor materials, it is unaffected by atmospheric agents and the accumulation of dirt, it can be adapted to various forms and sizes.
- the passive transreceiver unit is located in a position which is far from the metering unit and therefore more easily identifiable and accessible for the meter-readers.
- the reading device comprises means suitable to generate a radio-frequency field to activate and feed the transreceiver unit associated with the metering unit and to allow data to be exchanged.
- the reading device moreover may have devices to acquire and process data, devices to memorise data and possibly devices to transmit data, for example to a central data and pricing bank.
- the reading device is of the portable type and can be carried by the meter-readers.
- the reading device is of the stationary type and associated with the metering unit.
- the stationary reading device can be connected, possibly together with similar reading devices associated with other metering units, to a concentrator device associated in turn with a local processing unit which can communicate and transmit data, for example by means of a modem, to a central data processor.
- the readings are carried out according to commands issued by the central data processor, for example located in a central data bank, to the local processor situated, for example, in an area with a plurality of users.
- the recognition and reading system 10 consists, in this case, of a metering unit 11, a reading device 12 and a concentrator device 14.
- the metering unit 11 comprises a measuring device 15 of a conventional type, installed on the duct of the utility to be measured, associated with a pulse-emitting device 16, a device to acquire, process and transmit data 17 and a passive transreceiver 13.
- the pulse-emitting device 16 consists of a transducer able to generate a series of pulses directly proportional to the measurements made by the measuring device 15.
- the pulses are sent to an acquisition and conditioning device 18 which adapts them so that a process microprocessor 19 can obtain a series of numerical data relating to the measurements made by the device 15.
- this data contains information conditioned by the variations in time; therefore the data referring to the measurements can be classified, for example, according to the different time bands or periods of time.
- the data is memorised in a memory 21 which is also shared by a communication microprocessor 22 by means of a multiplexer 23.
- the communication microprocessor 22 is suitable to manage the functioning of the passive transreceiver 13; that is to say, it makes it possible to transfer to the passive transreceiver 13 the data memorised in the memory 21 and/or to acquire the data arriving in the passive transreceiver 13 and transfer it to the memory 21.
- the passive transreceiver 13 is integrated in an apparatus, known as a transponder 24, (shown in Fig. 1 by a line of dots and dashes), which brings together the communication microprocessor 22 and the memory 21; this apparatus makes it possible to communicate at a distance and without contact with a transreceiver device 25 associated with the reading device 12.
- a transponder 24 shown in Fig. 1 by a line of dots and dashes
- this apparatus makes it possible to communicate at a distance and without contact with a transreceiver device 25 associated with the reading device 12.
- the passive transreceiver 13 does not need its own sources of power; the devices 18-23 on the contrary are associated with a source of power 26, for example, a long-life battery.
- the transreceiver unit 25 is suitable to transmit a radio-frequency signal 28 which activates the passive transreceiver 13 and feeds it throughout its period of functioning.
- the passive transreceiver 13 is able to transmit the data 29 contained in the memory 21 and, at the same time, it can receive the data 30 which the meter-reader transfers from the reading device 12 and then transfer it to the memory 21.
- the data 29 received from the reading device 12 is processed by a processing device 27 which memorises it in a memory 31.
- the operations to read and/or transmit data is carried out by the meter-reader, in this case by means of the keyboard 32; a display device 33 makes it possible to verify the performance of the above operations and/or the display of further information.
- the interface device 34 transfers the data contained in the memory 31 to a concentrator device 14, which is suitable to collect the data from one or more reading devices 12 and can, in turn, be connected to a calculator 35 or to a printer 36.
- the reading device 12 comprises feeding means 37, for example consisting of rechargeable batteries, and can include a clock/calender 38, for example to verify and/or update the working of the clock/calendar 20 in the metering unit 11 and, possibly, to modify the pricing parameters.
- feeding means 37 for example consisting of rechargeable batteries
- a clock/calender 38 for example to verify and/or update the working of the clock/calendar 20 in the metering unit 11 and, possibly, to modify the pricing parameters.
- Fig. 2 shows a diagram of a possible embodiment of the invention with a portable reading device 12.
- a keyboard 32 On the outer surface of the containing structure of the reading device 12 there is a keyboard 32, a display 33, a connection device 39 to connect with the appropriate battery-charging devices, an aerial 43 for the transmission-reception of data and a connection device 40 to transfer the data which has been read to a concentrator device 14.
- the metering unit 11 comprises a conventional measuring device 15 associated with a passive transreceiver, in this case integrated into the transponder 24, which has the aerial 42 cooperating with the outer surface of the metering unit 11.
- the system to recognise and read meters thus achieved provides for the following procedure: the meter-readers, equipped with the reading device 12, position themselves with respect to the metering unit 11 at a distance 44 such that the transponder 24 is activated by the generation of a radio-frequency field.
- the operations to read the data and/or the inputting of the data to be transmitted are carried out by means of the keyboard 32; by means of the display 33 it is possible to verify the results of the readings carried out and/or to display other information, such as for example, the number of readings carried out, the state of charge of the battery, etc.
- the reading device 12 is introduced into the housing seating 41 of the concentrator device 14 and the data memorised in the reading device 12 are transferred by means of the connection device 40 to the concentrator device 14.
- the concentrator device 14 is able to manage and/or process the data collected and interface with a calculator 35 and with a printer 36 to process the data, for example operations to issue bills automatically.
Abstract
System for the remote recognition and reading of meters to
measure the consumption of utilities such as electric
energy, water, gas, etc., used for remote communication
between a metering unit and a reading device, the metering
unit comprising at least a measuring device (15) associated
with a device to emit pulses (16), the metering unit (11)
comprising means (17) to acquire, process and transmit data
connected at the inlet to the pulse-emitting device (16) and
at the outlet to a transreceiver unit (13), the
transreceiver unit (13) consisting of an unpowered passive
component which can be activated for reception and/or
transmission by means of a signal (28) emitted on a radio-frequency
generated by a transreceiver (25) associated with
the reading device (12).
Description
The invention concerns a system for the remote recognition
and reading of meters as set forth in the main claim.
To be more exact, the invention concerns a system for
remote recognition and reading which can be applied in cases
where there is a need to monitor the data measured by a wide
variety of meters, whether or domestic or industrial use,
such as for example meters for the consumption of electrical
energy, water meters, gas meters, etc.
The state of the art covers those meters which are used to
measure the consumption, either domestic or industrial, of
utilities such as electricity, water, gas or other, which
are suitable to display the total progressive consumption in
the specific unit of measurement. These meters usually have
a code to identify the apparatus which is generally printed
on the containing structure; it is attributed to the user
and is needed by the officials of the Utility companies in
order to associate the displayed reading with the user
concerned.
The data is read and transcribed onto registers, or input
into the appropriate devices, and is then processed by the
Utility company in order to issue the specific bill at the
pre-established dates.
This system involves a great deal of manual work and
therefore has various problems, which include: long
execution times, possibility of errors, difficult access,
difficulty in finding the meters etc. One example is water
meters, which are generally located in underground pits,
covered by heavy manholes, in dark places where dirt
accumulates. All this causes problems, especially when the
dirt accumulates on the part of the meter which is intended
to be read and/or on the identification code which may also
become illegible.
Another problem is that the meters are located on private
property which is therefore only accessible when the user is
present; in some cases the private property may be guarded
by dogs, which may be a danger for the meter-reader.
Another risk for the meter-reader is when the meter is to
measure toxic liquids, such as for example, industrial
waste, or when the meter is located in contaminated
industrial environments.
In the event that there are different tariffs for the
different time bands, another problem is that the meters can
only supply an average value because the display shows a
progressive, total consumption, referring to a predetermined
period of time,
With the reading systems such as are known to the state of
the art, therefore, it is a problem to sub-divide and/or
establish the amount consumed in the different periods of
the year, for example summer and winter, or in the different
time bands of the day, for example day and night; the
Utility companies therefore find it difficult to apply
tariffs which are differentiated according to different time
bands and periods of time, and therefore to apply the higher
rates to the users for peak time use.
Systems have been studied which are able to read the
meters from a distance in order to overcome these
shortcomings.
These systems are based on the use of transmitters and
receivers using a radio-frequency; however, they involve a
series of problems such as: the need to use specific
aerials, the danger that the transmissions are affected by
electrical or electronic disturbances in general, the need
to locate the meters in places suitable for the transmission
of radio-frequencies and therefore, in the majority of
cases, it is impossible to utilise those sites already used
by meters of a conventional type.
The present applicants have designed, tested and embodied
this invention to overcome the shortcomings of the state of
the art and to achieve further advantages.
The invention is set forth and characterised in the main
claim, while the dependent claims describe variants of the
idea of the main embodiment.
The purpose of the invention is to provide a system for
the remote recognition and reading of meters which is able
to perform conventional reading operations automatically.
Another purpose of the invention is to obtain a system
able to perform remote operations of reading and/or writing
using a transreceiver device which, while it is working,
does not need its own source of power and works on a low
frequency.
A further purpose of the invention is to acquire, at a
distance and automatically, a plurality of supplementary
data such as, for example, consumption according to the
different time bands, the date of installation and last
reading, the serial numbers attributed by the builder and/or
the Utility company or other data according to the specific
applications to which the meter is intended.
A further purpose is to obtain a system which is reliable,
versatile, long-lasting, ergonomic, inexpensive and easy to
use.
The recognition and reading system according to the
invention substantially comprises a metering unit and a
reading device which communicate to each other by means of
low frequency trasmissions.
The metering unit consists of a measuring device of a
conventional type associated with a device suitable to emit
pulses correlated to the measurements monitored, and of a
device to acquire, process and transmit data, installed
directly in cooperation with the measuring device.
The device to acquire, process and transmit data receives
the pulses as input, processes them and emits as output
numerical data relating to the readings, as well as other
possible information, such as for example temporal
information relating to the readings. The numerical data can
be associated and/or integrated with supplementary and/or
auxiliary information such as for example, a code, a serial
number, the date of installation of the metering unit, etc.
According to the invention, the device to acquire, process
and transmit data cooperates at least with a passive
transreceiver unit, that is to say, of the type which does
not require its own power supply while it is working, which
is able to exchange data on a low frequency with a
transreceiver on the reading device.
According to the invention, the transreceiver unit
installed on the meter, when it is activated by a radio-frequency
field, for example generated by the transreceiver
on the reading device, is able to transmit and/or receive
the data memorised in the metering unit.
Using a transreceiver unit of this type gives a plurality
of advantages: it is not necessary to supply a source of
power, and therefore it can function in any site or position
whatsoever; it is possible to transfer data through non
conductor materials, it is unaffected by atmospheric agents
and the accumulation of dirt, it can be adapted to various
forms and sizes.
According to a variant, the passive transreceiver unit is
located in a position which is far from the metering unit
and therefore more easily identifiable and accessible for
the meter-readers.
According to the invention, the reading device comprises
means suitable to generate a radio-frequency field to
activate and feed the transreceiver unit associated with the
metering unit and to allow data to be exchanged. The reading
device moreover may have devices to acquire and process
data, devices to memorise data and possibly devices to
transmit data, for example to a central data and pricing
bank.
The reading device is of the portable type and can be
carried by the meter-readers.
According to a variant, the reading device is of the
stationary type and associated with the metering unit.
The stationary reading device can be connected, possibly
together with similar reading devices associated with other
metering units, to a concentrator device associated in turn
with a local processing unit which can communicate and
transmit data, for example by means of a modem, to a central
data processor.
According to this variant, the readings are carried out
according to commands issued by the central data processor,
for example located in a central data bank, to the local
processor situated, for example, in an area with a plurality
of users.
The attached Figures are given as a non-restrictive
example and show some preferred embodiments of the invention
as follows:
- Fig. 1
- shows a functional diagram of the system to recognise and read meters according to the invention;
- Fig. 2
- shows in diagram form a possible embodiment of the invention.
The recognition and reading system 10 according to the
invention consists, in this case, of a metering unit 11, a
reading device 12 and a concentrator device 14.
The metering unit 11 comprises a measuring device 15 of a
conventional type, installed on the duct of the utility to
be measured, associated with a pulse-emitting device 16, a
device to acquire, process and transmit data 17 and a
passive transreceiver 13.
The pulse-emitting device 16 consists of a transducer able
to generate a series of pulses directly proportional to the
measurements made by the measuring device 15.
The pulses are sent to an acquisition and conditioning
device 18 which adapts them so that a process microprocessor
19 can obtain a series of numerical data relating to the
measurements made by the device 15.
Thanks to the clock/calender 20, this data contains
information conditioned by the variations in time; therefore
the data referring to the measurements can be classified,
for example, according to the different time bands or
periods of time.
The data is memorised in a memory 21 which is also shared
by a communication microprocessor 22 by means of a
multiplexer 23.
The communication microprocessor 22 is suitable to manage
the functioning of the passive transreceiver 13; that is to
say, it makes it possible to transfer to the passive
transreceiver 13 the data memorised in the memory 21 and/or
to acquire the data arriving in the passive transreceiver 13
and transfer it to the memory 21.
In a preferential embodiment of the invention, the passive
transreceiver 13 is integrated in an apparatus, known as a
transponder 24, (shown in Fig. 1 by a line of dots and
dashes), which brings together the communication
microprocessor 22 and the memory 21; this apparatus makes it
possible to communicate at a distance and without contact
with a transreceiver device 25 associated with the reading
device 12.
The passive transreceiver 13 does not need its own sources
of power; the devices 18-23 on the contrary are associated
with a source of power 26, for example, a long-life battery.
The transreceiver unit 25 is suitable to transmit a radio-frequency
signal 28 which activates the passive
transreceiver 13 and feeds it throughout its period of
functioning.
Once it has been activated by the radio-frequency field,
the passive transreceiver 13 is able to transmit the data 29
contained in the memory 21 and, at the same time, it can
receive the data 30 which the meter-reader transfers from
the reading device 12 and then transfer it to the memory 21.
The data 29 received from the reading device 12 is
processed by a processing device 27 which memorises it in a
memory 31.
The operations to read and/or transmit data is carried out
by the meter-reader, in this case by means of the keyboard
32; a display device 33 makes it possible to verify the
performance of the above operations and/or the display of
further information.
The interface device 34, by means of the appropriate
connection, transfers the data contained in the memory 31 to
a concentrator device 14, which is suitable to collect the
data from one or more reading devices 12 and can, in turn,
be connected to a calculator 35 or to a printer 36.
The reading device 12 comprises feeding means 37, for
example consisting of rechargeable batteries, and can
include a clock/calender 38, for example to verify and/or
update the working of the clock/calendar 20 in the metering
unit 11 and, possibly, to modify the pricing parameters.
Fig. 2 shows a diagram of a possible embodiment of the
invention with a portable reading device 12.
On the outer surface of the containing structure of the
reading device 12 there is a keyboard 32, a display 33, a
connection device 39 to connect with the appropriate
battery-charging devices, an aerial 43 for the transmission-reception
of data and a connection device 40 to transfer the
data which has been read to a concentrator device 14.
The metering unit 11 comprises a conventional measuring
device 15 associated with a passive transreceiver, in this
case integrated into the transponder 24, which has the
aerial 42 cooperating with the outer surface of the metering
unit 11.
The system to recognise and read meters thus achieved
provides for the following procedure: the meter-readers,
equipped with the reading device 12, position themselves
with respect to the metering unit 11 at a distance 44 such
that the transponder 24 is activated by the generation of a
radio-frequency field.
The operations to read the data and/or the inputting of
the data to be transmitted are carried out by means of the
keyboard 32; by means of the display 33 it is possible to
verify the results of the readings carried out and/or to
display other information, such as for example, the number
of readings carried out, the state of charge of the battery,
etc.
At the conclusion of the readings carried out on one or
more metering units 11, the reading device 12 is introduced
into the housing seating 41 of the concentrator device 14
and the data memorised in the reading device 12 are
transferred by means of the connection device 40 to the
concentrator device 14.
The concentrator device 14 is able to manage and/or
process the data collected and interface with a calculator
35 and with a printer 36 to process the data, for example
operations to issue bills automatically.
Claims (10)
- System for the remote recognition and reading of meters to measure the consumption of utilities such as electric energy, water, gas, etc., used for remote communication between a metering unit and a reading device, the metering unit comprising at least a measuring device (15) associated with a device to emit pulses (16), the system being characterised in that the metering unit (11) comprises means (17) to acquire, process and transmit data connected at the inlet to the pulse-emitting device (16) and at the outlet to a transreceiver unit (13), the transreceiver unit (13) consisting of an unpowered passive component which can be activated for reception and/or transmission by means of a signal (28) emitted on a radio-frequency generated by a transreceiver (25) associated with the reading device (12).
- System as in Claim 1, in which the means (17) to acquire, process and transmit data comprise an acquisition and conditioning unit (18) connected at the inlet with the pulse-emitting device (16) and at the outlet with a memory (21) associated with the transreceiver (13) by means of a communication microprocessor (22).
- System as in claim 1 or 2, in which the transreceiver (13), the communication microprocessor (22) and the memory (21) are integrated into a single component (transponder) (24).
- System as in claim 1 or 2, in which the transreceiver unit (13) is of the reading-only type and is suitable to transmit the data contained in the memory (21) to the reading device (12).
- System as in claim 1 or 2, in which the transreceiver unit (13) is of the reading and writing type and is suitable to receive data from the reading device (12), to transfer data to the memory (21) and to transmit data to the reading device (12).
- System as in any claim hereinbefore, in which the means (17) to acquire, process and transmit data comprise a clock/calender (20) connected to the acquisition and conditioning unit (18).
- System as in any claim hereinbefore, in which the reading device (12) is of the portable type.
- System as in any claim from 1 to 6 inclusive, in which the reading device (12) is of the stationary type and is associated with the metering unit (11).
- System as in any claim hereinbefore, in which the reading device (12) comprises means (32) to introduce the data, display means (33), memory means (31) and data processing means (27) connected to the transreceiver unit (25).
- System as in any claim hereinbefore, in which the reading device (12) comprises interface means (34) and connection means (40) with a concentrator device (14) which can be connected with a plurality of reading devices (12).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT96UD000158A IT1288972B1 (en) | 1996-08-12 | 1996-08-12 | REMOTE RECOGNITION AND READING SYSTEM OF METERS |
| ITUD960158 | 1996-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0825577A1 true EP0825577A1 (en) | 1998-02-25 |
Family
ID=11422174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97113140A Withdrawn EP0825577A1 (en) | 1996-08-12 | 1997-07-30 | System for the remote recognition and reading of meters |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0825577A1 (en) |
| IT (1) | IT1288972B1 (en) |
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| WO2000075902A1 (en) * | 1999-06-09 | 2000-12-14 | Total Metering Limited | Improvements relating to metering systems |
| WO2000078678A2 (en) * | 1999-06-21 | 2000-12-28 | Amway Corporation | Fluid treatment system with electromagnetic radiation |
| WO2001024345A1 (en) * | 1999-09-22 | 2001-04-05 | Abb Ab | Supervision system |
| US6436299B1 (en) | 1999-06-21 | 2002-08-20 | Amway Corporation | Water treatment system with an inductively coupled ballast |
| US6673250B2 (en) | 1999-06-21 | 2004-01-06 | Access Business Group International Llc | Radio frequency identification system for a fluid treatment system |
| KR100421568B1 (en) * | 1998-12-29 | 2004-04-17 | 서창전기통신 주식회사 | Meter wireless meter reading method using handy terminal |
| US6825620B2 (en) | 1999-06-21 | 2004-11-30 | Access Business Group International Llc | Inductively coupled ballast circuit |
| US8000314B2 (en) | 1996-12-06 | 2011-08-16 | Ipco, Llc | Wireless network system and method for providing same |
| US8013732B2 (en) | 1998-06-22 | 2011-09-06 | Sipco, Llc | Systems and methods for monitoring and controlling remote devices |
| US8031650B2 (en) | 2004-03-03 | 2011-10-04 | Sipco, Llc | System and method for monitoring remote devices with a dual-mode wireless communication protocol |
| US8064412B2 (en) | 1998-06-22 | 2011-11-22 | Sipco, Llc | Systems and methods for monitoring conditions |
| EP2397924A1 (en) * | 2009-02-10 | 2011-12-21 | Dong Guan Ricktek Electric-mechanical Co., Ltd. | Bidirectional wireless electrical energy monitoring system |
| US8138875B2 (en) | 1999-06-21 | 2012-03-20 | Access Business Group International Llc | Inductively powered apparatus |
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| US8335304B2 (en) | 1997-02-14 | 2012-12-18 | Sipco, Llc | Multi-function general purpose transceivers and devices |
| US8410931B2 (en) | 1998-06-22 | 2013-04-02 | Sipco, Llc | Mobile inventory unit monitoring systems and methods |
| US8446884B2 (en) | 2004-03-03 | 2013-05-21 | Sipco, Llc | Dual-mode communication devices, methods and systems |
| US8489063B2 (en) | 2001-10-24 | 2013-07-16 | Sipco, Llc | Systems and methods for providing emergency messages to a mobile device |
| CN101540096B (en) * | 2008-03-17 | 2013-08-21 | 吴明星 | Method for managing power supply of passive meter reading system |
| US8666357B2 (en) | 2001-10-24 | 2014-03-04 | Sipco, Llc | System and method for transmitting an emergency message over an integrated wireless network |
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Also Published As
| Publication number | Publication date |
|---|---|
| ITUD960158A1 (en) | 1998-02-12 |
| IT1288972B1 (en) | 1998-09-25 |
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