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Smart Gas Meters:
Technologies & Challenges
Dr. R S Shekhawat,
New Products Development
(Gas Metering)
Secure Meters Ltd.
22
Contents
Mechanical meters and associated problems
What is ‘smart’ device?
Embedding smartness in meters
– The desired ...
33
Mechanical meters and associated
problems
India domestic installation base consists of diaphragm
meters
These are predo...
44
Smartness
Oxford dictionary:
(Of a device) programmed so as to be capable of some
independent action.
• Example: Smart ...
55
Benefits derived out of its’ smartness
Ease of installation and communication,
Self-diagnosis,
improved readability and...
66
The desired behaviour of a Smart [Gas]
Meter
Record the consumption with best possible accuracy
Report energy consumpti...
77
Design attributes for smart functionality
Convert consumption in digital values, store & display
(The conversion must b...
88
Hybrid Smart Gas Flow Meters
Measurement still using mechanical elements
(diaphragms etc)
Compensation of errors easier...
99
Electronic - Ultrasonic
Inherently electronic measurements (transit time or
frequency method)
Natural interface to elec...
1010
Electronic – Thermal
Very low starting flow (4 LPH)
Noise-less and wear free
Compact design
Differentiation between N...
1111
Electronic – Charge flow
Highly accurate
Minimal signal processing
Low power
Small in size
Gamma ray source containme...
1212
Communication systems (Home Area
Network)
Wired or wireless
Metering Bus (Mbus)
ZWave
Bluetooth
ZigBee
Wi-Fi
GSM/GPRS...
1313
Thanks
email: rajveer.shekhawat@securetogether.com,
rajveer1957@hotmail.com
© Secure Meters Ltd
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Smart Gas Meters Technology & Challenges-CGD2014

Highlights the major requirements for a smart gas flow meter for domestic use

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Smart Gas Meters Technology & Challenges-CGD2014

  1. 1. Smart Gas Meters: Technologies & Challenges Dr. R S Shekhawat, New Products Development (Gas Metering) Secure Meters Ltd.
  2. 2. 22 Contents Mechanical meters and associated problems What is ‘smart’ device? Embedding smartness in meters – The desired functionality of smart meters – The design attributes enabling smartness – How different flow metering technologies enable these features? – The race/compromise of different functionality/features for optimal product Communication sub-systems – ZigBee and associated SEP x.y – Sub-GHz RF – Bluetooth – WiFi (futuristic) Benefits – The consumer – Utility/DistributorSmart Ultrasonic
  3. 3. 33 Mechanical meters and associated problems India domestic installation base consists of diaphragm meters These are predominantly based on mechanical measurement and are prone to various drawbacks associated with it namely  Accuracy degradation over period of time- Mechanical parts  Manual reading – No smart billing options like prepayment  No AMR functionality- No i/o’s and modules provisions  Prone to tampers- tilt , bypass, etc There are two solutions to approach the above problem which is practiced worldwide namely  Retrofit mechanical meter with electronic interface  Electronic measurement based on emerging technologies © Secure Meters Ltd
  4. 4. 44 Smartness Oxford dictionary: (Of a device) programmed so as to be capable of some independent action. • Example: Smart Transmitters have capability of: – Configuration – Re-ranging/auto-calibration – Standalone/independent [communication] – Signal conditioning – Self-diagnosis © Secure Meters Ltd
  5. 5. 55 Benefits derived out of its’ smartness Ease of installation and communication, Self-diagnosis, improved readability and reliability. Less subject to effects of temperature and humidity than analog devices. although vibration can still affect them, the effects are far less than with analog devices. Smart [transmitters] also provide increased accuracy. And because can replace several different types of devices, using them allows for inventory reduction. © Secure Meters Ltd
  6. 6. 66 The desired behaviour of a Smart [Gas] Meter Record the consumption with best possible accuracy Report energy consumption at any interval & on excessive consumption Elicit behavior of consumption patterns Correlate consumption rates with appliances in house Govern consumption by set limits (prepay mode) Raise alerts/alarms for tampers Remotely readable and controllable (tariff and supply) Improved revenue collection with lower overheads © Secure Meters Ltd
  7. 7. 77 Design attributes for smart functionality Convert consumption in digital values, store & display (The conversion must be high resolution (few ml)) Have good local amount of memory for local storage (upto a month) Flag/log different type of events (e.g. excess usage) Event-driven communications with minimum delay Inbuilt self diagnosis Auto-calibration Stop/resume flow switch © Secure Meters Ltd
  8. 8. 88 Hybrid Smart Gas Flow Meters Measurement still using mechanical elements (diaphragms etc) Compensation of errors easier (combination of gears and electronically computed) Coupling of mechanical index using magnetic or magneto-optical Degradation effects still persist: diaphragm material shrinkage, gear train wear and tear, and thus need recalibration after 5-7 years Bigger in size & weight Usually Noisy © Secure Meters Ltd
  9. 9. 99 Electronic - Ultrasonic Inherently electronic measurements (transit time or frequency method) Natural interface to electronic systems Wide dynamic range Easier calibration (in-built) Small in size and thus much lighter Longer life (no moving parts) Differentiation between NG & air © Secure Meters Ltd
  10. 10. 1010 Electronic – Thermal Very low starting flow (4 LPH) Noise-less and wear free Compact design Differentiation between NG & air © Secure Meters Ltd
  11. 11. 1111 Electronic – Charge flow Highly accurate Minimal signal processing Low power Small in size Gamma ray source containment is an issue Heavy due to shielding of radiation © Secure Meters Ltd
  12. 12. 1212 Communication systems (Home Area Network) Wired or wireless Metering Bus (Mbus) ZWave Bluetooth ZigBee Wi-Fi GSM/GPRS Mesh Radio © Secure Meters Ltd
  13. 13. 1313 Thanks email: rajveer.shekhawat@securetogether.com, rajveer1957@hotmail.com © Secure Meters Ltd

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