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Meter reading environment
About the electricity meter: Excluding the place where the electric meter box is installed in a very few places, the place where the meter reader climbs the ladder, most of the meters are kept in the meter box, waiting for the meter reader to visit.
About water meters: Water meters are different!
The best situation is here
Although it is dirty here, it is a good location
But have you seen these situations?
There is here
Home, household, centralized, decentralized, ground, underground, wet, dry, table box, naked, water meter you can do anything you know?
Measuring medium
Regarding electricity: The sources of electricity are nothing more than power plants and generators. The elimination of some small distributed generators may be somewhat unstable, and most of them are just like soldiers trained by troops. They use uniform steps step by step to provide access to electricity everywhere. .
About water: The water is ground water and groundwater fly together. The water flowing through the water meter indicates that the baby may be river water, lake water, river water, shallow water, deep well water... Do you want to guess!
and! Although 108 tests have been performed, due to water quality reasons, there are still some water meters that are prone to valve fouling and switching valves!
Transfer Protocol
The transmission protocol can be divided into two parts: one is from the watch to the collection device, and the other is from the acquisition device to the meter reading software.
About electricity: Meter data to the collection device is a unified DL ∕ 645-2007 agreement, the provisions are very specific, as long as the agreement, the tableware will be interchangeable, and the collected data to the meter reading software transmission is Q∕GDW367- In 2009, the power user information collection system communication protocol did not have any problems in interconnection.
About water: The water meter data to the collection device, although the Ministry of Construction released CJ-T188-2004, but the water meter manufacturers have different understanding of the CJ-T188-2004 agreement, the product also has large and small differences, in addition to the collection When the data is transmitted to the meter reading software, there is no uniform standard and it is the water companies or manufacturers who write it on their own. Therefore, there are certain problems in data interconnection between different manufacturers and different water companies.
Performance testing
Regarding the electric meter: The metering performance of the meter is the responsibility of the technical supervision department. The communication protocol of the meter will be tested in the measurement center of the State Grid. The communication of the meter must pass the test and certification of the National Grid Measurement Center.
Regarding water meters: There is currently a special technical supervision department to measure the metering performance of the water meter; however, there is no specific inspection mechanism for the communication protocol of the meter, and the collection device (concentrator/ collector) has no counterpart department management.
Demand difference
Regarding electricity meters: The electric industry has a high degree of standardization, and its length, width and height are determined. The installation method and environment are basically determined. This is probably what it looks like:
About the water meter: The water meter is required to have various diameters according to different customer needs; different installation methods; different water quality; different display methods; different materials; different types of remote transmission...
Power supply
Water meter can be divided into battery-powered, M-BUS power supply, RS485 power supply, in order to ensure battery life, low power consumption design, and moisture-proof design to reduce the self-discharge consumption of the battery after the damp; and the meter is the power supply for the city, With a strong base, it is relatively involuntary.
Actually, the difference between an electricity meter and a water meter is not limited to these. From the big industrial environment to the perfection of the industrial chain, to the specific manufacturing inspection standards, there are such differences. Xiao Bian believes that it is not possible to directly define the good or the bad according to the degree of perfection of the industrial chain. There must be places where the two industries can learn from each other and complement each other.
What about electricity meters and meters? They actually have such a big difference.
ã€China Instrument Network Science and Technology】 Today, Xiao Bian is looking at the differences between the meter and meter industries.