一、Gas meter equipment management system diagram (general diagram):
Description:
1) The gas meter adopts the latest NB-IOT technology and establishes communication with the Internet of Things platform through the NB operator base station to realize remote data transmission and control.
2) The Internet of Things data platform, relying on a big data center, multiple open protocol access, multiple open protocol data push, provides data support for the business logic of the integrated application layer, and provides data access for third-party data services.
3) The system uses advanced data analysis technology and continuously trained artificial intelligence models to visualize data analysis and predict gas demand.
4) The user can check the gas consumption through the mobile phone APP, pay online fees, and report for repairs.
5) The gas company has real-time control of the daily gas consumption of all gas meters, payment status and all detailed equipment parameters. It can perform remote valve control, step gas price, price adjustment, recharge payment, etc. through the platform management terminal. And with the help of data analysis results, it provides a theoretical basis for the evaluation of gas resource allocation and user gas usage habits.
二. Operational charges and integrated management system diagram (operational service application system)
Description:
1) A comprehensive management system integrating smart meter management, recharge, meter reading, settlement, charging, statistical analysis and other functions.
2) It can manage the NB-IoT Internet of Things gas meter, create files for users, and complete the functions of timing and automatic collection of smart meter data, usage settlement, user payment, etc.; rich query and analysis functions, support business query statistics, classification Information query statistics and other functions;
3) Security authority control, different roles can be set to control operator's access authority;
4) The system is easy to install and deploy, with one-click wizard installation, and the system can be installed and upgraded only by simple selection;
5) With a custom invoice function, users can flexibly change the format and layout of the invoice;
6) Use the WeChat official account platform interface, combined with the data collection system to realize smart meter WeChat copy control, arrears notification push, historical usage query and WeChat payment payment and other functions, combined with telephone customer service, SMS customer service, and online customer service to achieve diversified customers Way of communication
三. Introduction of gas meter (in accordance with the national standard "GB/T 6968-2019 diaphragm gas meter")
The NB-IoT Internet of Things gas meter can cooperate with the management system to realize functions such as cardless prepayment, remote valve control, step gas price, price adjustment, etc. Users can pay through the mobile APP.
The main function:
1) Anti-disassembly alarm function
When the gas meter moves or shakes greatly, the gas meter will give an audible and visual alarm, close the valve and report the fault to the gas company's management system, completely preventing gas users from disassembling the meter.
2) Valve opening protection function
When the valve of the gas meter is closed due to insufficient remaining amount and other malfunctions, the meter opens the valve opening protection function, that is, the meter valve can only be opened under manual intervention. After the recharge is completed and the corresponding fault is cleared, you need to click the "query" button to activate the meter valve. The purpose of this design is to, on the premise of confirming safety, perform manual protection intervention on the valve opening action of the gas meter to avoid uncontrollable situations.
3) Historical data storage function
The meter continuously saves the user meter data every month and every day for 12 months.
4) Remote data reading and switch valve
Reading of user meter status information and control of meter valve status can be performed through the background of the gas company management system, and the function of regular data upload can be set;
5) Prepaid recharge function
The gas meter can be recharged through prepaid without a card, such as APP, Alipay, WeChat, online business halls, and online banking.
6) Ladder gas price function
The gas meter of the Internet of Things can divide the gas price into four levels according to the gas consumption, and can set the time and price parameters. It can realize the step pricing function according to the user's consumption per natural month or multiple natural months. The gas meter will follow the steps The price rules are used for settlement, and parameters such as the amount of the current ladder, price and remaining amount are displayed.
7) Timely upload data fault tolerance mechanism
During scheduled upload, if the data is not successfully uploaded once, the meter will wait for a period of time and then try to send the data again.
8) Data protection and security
Data can be stored for a long time without being affected by external interference, low voltage, power failure, battery replacement, etc.
9) Fault self-diagnosis function
An IoT gas meter equipped with a liquid crystal display can display the corresponding error code and buzzer alarm in different states, and self-protect the detected gas meter failure and the user's illegal operation.
technical parameter:
|
Nominal flow
|
m³/h
|
1.6
|
2.5
|
4
|
|
Maximum flow
|
m³/h
|
2.5
|
4
|
6
|
|
Minimum flow
|
m³/h
|
0.016
|
0.025
|
0.04
|
|
Measurement grade
|
level
|
1.5
|
|
Basic error limit
|
%
|
Qmin≤Q＜0.1Qmax时±3
0.1Qmax≤Q≤Qmax时±1.5
|
|
Maximum reading
|
m³
|
99999.999
|
|
Working pressure
|
kPa
|
10
|
|
Total pressure loss
|
Pa
|
≤250
|
|
Tightness
|
kPa
|
No leakage within 3min under 20kPa pressure
|
|
Explosion-proof standard
|
|
EXib IIBT3 Gb
|
|
Minimum reading of character wheel
|
dm³
|
0.2
|
|
Operating temperature
|
℃
|
-10～+50
|
|
Medium condition
|
|
All kinds of gas, air, non-corrosive gas
|
|
Inlet and outlet pipe thread
|
Mm
|
M30×2
|
|
Center distance of inlet and outlet pipe
|
Mm
|
130
|
|
Outside dimensions
|
Mm
|
H220xW205xD161
|
|
weight
|
Kg
|
2.04
|
|
Power supply
|
|
4 alkaline batteries (external) + 1 lithium battery (internal)
|
|
Operating Voltage
|
V
|
DC 5.0V～ 7.0V
|
|
Working current (average)
|
mA
|
≤90
|
|
Quiescent Current
|
uA
|
≤20
|
|
Sampling method
|
|
Double reed pipe
|
|
Valve reliability
|
|
The number of continuous switching is not less than 10000 times
|
|
Valve closing time
|
S
|
＜0.5
|
|
Clock error
|
Minutes/month
|
＜10
|
|
Protection level
|
|
IP65
|
|
communication method
|
|
NB-IOT
|
|
Success rate of one meter reading
|
|
≥98.5%
|
|
Data reading accuracy
|
|
≥99%
|
Installation size
|
Product specifications
|
H
|
W
|
D
|
E
|
A
|
weight
|
|
Steel shell
|
224mm
|
195mm
|
67mm
|
168mm
|
130mm
|
2.2Kg
|
|
Aluminum shell
|
224mm
|
215mm
|
74mm
|
175mm
|
110mm
|
2.1Kg
|
