With the increasing use of smart meters, there are more and more favorable effects on our lives. At the same time, they are also changing our lives subtly. According to China Power Grid proposed a master plan, and summed up the development of China's power grid meter in the past 10 years, we can conclude that: to achieve meter automatic meter reading, the premise is that the meter needs to be intelligent first, so as to realize the data exit. To achieve the purpose of centralized meter reading, there are several forms of electricity meters commonly used at home and abroad for centralized meter reading. 1. Electrically coupled meter The first kind of electromechanical combined power meter is based on the original mechanical watch, adding an electronic counting device and corresponding control and communication circuits, or adding an IC card reading and writing interface to realize automatic metering, billing and control. Its basic structure is to punch or smear the material on the turntable of the original mechanical power meter to absorb light. Through photoelectric conversion, the rotation of the mechanical turntable is converted into an electric pulse signal, and corresponding counting processing is performed. Since the metering principle of this kind of meter has not been changed, its metering accuracy and characteristics are exactly the same as the mechanical meter, but the cost is relatively high. The advantage is that it can make full use of the large number of mechanical meter installed and in use, and its The measurement principle is familiar to the public and easy to accept. Another type of electromechanical combined meter is the use of electronic metering circuit in the digital pulse signal, through the micro-motor driven word code wheel to get the energy count, this structure is the most concise and practical electronic meter The program, but unfortunately its higher requirements for the measurement circuit, that requires all the tables are converted to a corresponding number of digital pulses in accordance with a fixed ratio, in order to drive the micro motor to rotate the word wheel at the correct speed . This ratio is the so-called ammeter constant (imp/kWh). Because the timing components used in the circuit to determine the pulse speed are mostly RC components with large discreteness of parameters, in order to ensure the metering accuracy of the meter and the consistency of the product, It is necessary to strengthen the screening of components and the adjustment of semi-finished products in the production process, that is to say increase the input of manpower and material resources and prolong the production cycle, so that the production cost and cost of the power meter increase. In addition, the meter of this kind of structure is no different from the old-fashioned mechanical watch in terms of data collection and user payment, and should be a phase-out product. 2. All-electric meter The all-electronic power meter is the most advanced type of power meter in the country. It adopts advanced single chip microcomputer technology and a specially designed integrated circuit for energy measurement. It has high measurement accuracy, can prevent power theft, has low self loss and reliability. Advanced features. Some of these models also have dual billing functions. Since the electricity consumption data of such a power meter has been digitized, it can be easily combined with various data collection and transmission circuits to form an automatic metering and billing system, which is a new generation of current household electric meters. Use will save the power metering department a large number of meter reading calculations, and timely recovery of electricity (pay first after the use of electricity), with great economic and social benefits. (1) Centralized meter reading in the bus system: The meter part adopts a smart meter, and the smart meter signal lines of each household are connected in parallel on a bus. The bus is connected to the downstairs adapter, and each floor adapter is connected to the concentrator of the district. Concentrator centralized power supply. (2) Power Carrier Meter Reading: The centralized power meter reading system is a centralized meter reading system that directly utilizes the existing low voltage transmission lines for data transmission, eliminating the need for a wiring line project. The system integrates microelectronics, communication technology and computer technology in one high-tech product. It is highly reliable and simple to install. It is widely used in metering and monitoring of electricity meters and gas meters in urban and rural areas. However, because the power line is used to transmit electrical energy to electrical equipment, rather than to transmit data, the power line has many restrictions on data transmission: (1) The distribution transformer has a barrier effect on the power carrier signal, so the electrical carrier signal can only be A distribution transformer transmits within the area; (2) Different signal coupling methods have different losses for the power carrier signal; (3) The power line has its own inherent impulse interference. In addition, high power line reduction, high noise, and high distortion make the power line an unsatisfactory communication medium. However, due to the development of modern communication technologies, power line carrier communication becomes possible. The signal-to-noise ratio of the data signal determines the transmission distance. . The key to power line carrier communication is to use a powerful Powerline carrier dedicated Modem chip. Full electronic meter system consists of: (1) Remote Spreadsheet. Meters with pulse output such as water meter, electricity meter, gas meter, and hot meter are remote meters. The metering method is the same as the traditional meter. The difference is that the pulse output function is added to the original base meter. Each pulse represents a certain measurement value. . The collector collects pulses through the pulse output port of the remote table. (2) Collector. The collector can simultaneously collect the pulse information of water meters, electricity meters, gas meters, and heat meters, and convert these pulse information into physical quantities for measurement and storage in the memory of each collector. Through the management of the microcomputer, you can query any system A user's energy consumption information is uploaded to the user's information under the management computer's meter reading and other commands. (3) Converter. The main task of the converter is to complete the data communication work with the collector, release the power data freeze command to the collector, periodically receive the collector's power data or receive the data of a certain meter or a group of meter according to the system requirements. According to the system requirements, the communication with the master station is completed, and the information needed by the master station such as user electricity data is transmitted to the master station database. The downlink channel refers to the communication line between the converter and the collector. There are mainly three methods: bus meter reading system, carrier meter reading system, and infrared meter reading system. The upward channel of the communication channel refers to the communication line between the converter and the master station, and may use communication media such as telephone, wireless, and dedicated lines. (4) System management software functions. The system management software is based on communication, with the database as the core, providing data processing, query, statistics, reporting, backup, and other functions; using a combination of object-oriented and modular methods to flexibly support different customer requirements, such as special format reports, Authority control, etc.; holding the customer's original management system, can interface with other management software, provide data interface and communication interface, have network communication function; can manage multiple cells at the same time, set communication parameters for each cell; power meter management, set the meter The original parameters, address, and status; rate management, can be arbitrarily set a variety of rates, set the unit price of each energy; user management, management and control of the amount of each household, management of user settlement methods; real-time meter reading function, The system can capture the real-time data of each energy meter; the cost is automatically calculated and the average energy loss of the public energy is realized.
1.Application : Black Anodized
OD
OD Tolerance
ID
Tolerance
Roundness
Straightness
Circular
run-out
φ16-20
±0.02
±0.02
0.01↓
0.015↓
0.05↓
φ20-30
±0.02
±0.02
0.01↓
0.015↓
0.05↓
φ30-50
±0.05
±0.05
0.02↓
0.020↓
0.08↓
φ50-80
±0.15
±0.10
0.05↓
0.025↓
0.10↓
7. Trade Terms Black Anodized Aluminum Tube,Aluminum Black Anodized Pipe,Aluminum Black Anodized Tube Changzhou YiFei Machinery Co., Ltd. , http://www.yifeialu.com
2.Dimension: Customized dimension, OEM & ODM
3.Material: A6063, A6061, A3003 and other series alu alloy
4.Suface treatment: Anodizing, polishing, turning ,power coating, mill finish etc
5.Equipment: CNC ,extruding machine, cold drawn machine, heating oven, straightening machine, cutting machine
6. STANDARD PACKING:Wooden case/carton
1. Payment: 30% T/T in advance, 70% balance pay before delivery. L/C at sight.
2. Delivery time: 20 days after deposit receiverd. If opening mould, plus 7-10 days.
3. Trade Term can be chosen depending on your requirements.
4. FOB Port: Shanghai