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The development of water meters has experienced pulse water meters, card meters, direct reading water meters, and electronic water meters. The current trend is the electronic water meter, which is specifically divided into impeller-type electronic water meters, ultrasonic water meters, electromagnetic water meters, and other water metering principles. However, the current penetration rate of electronic water meters in China is low, mainly because the supply chain and sales channels of mechanical water meters are very mature, but many operating methods for mechanical water meters do not work on electronic water meters, such as storage, mechanical water meters can After being put in the tap water business office for many years, the electronic water meter (big table) was stored for more than two years and the battery could not be used. There are many new technologies for battery issues, such as wireless charging and flexible batteries. In the era of the rapid development of the Internet, the battery problem I believe can be overcome. There are too many different mechanical and electronic water meters. For the use of electronic water meters, the management team needs to accept new ideas and rely on new generations of talent so that its advantages can be brought into play.
Water meter standards At present, China's water meter standards mainly have the following three:
1. JJG162-2009 Metrological Verification Regulations 2. GB/T 778.1~3 -2007 "Drinking Cold Water Meters and Hot Water Meters for Measuring Water Flow in Closed Full Pipes"
3, CJ/T 188-2004 "household meter data transmission technical conditions" revision.
Where does the water meter data come from? The country always provides smart cities, smart water services, etc. Water meter data must be transmitted to many locations such as water divisions, communities, cities, and power grids. The State Grid has collected meter data and can copy it as long as there are lighting circuits. But with water meters, there can be no circuit. We need to understand the installation environment of the water meter. The installation environment of small-diameter and large-diameter water meters is completely different. A water meter with a diameter of 15-20mm is installed outdoors, and a water meter with a diameter of 25-50mm can be installed in a water meter well. Signals are difficult to come by. 80-300mm water meter installation environment is poor, and some will be buried directly underground. Water meter above 300mm, the installation environment is slightly better, will provide it with power.
Where are the water meter data? At present, many manufacturers read their own data and give the data to the water division. There are also water divisions who read the tables themselves to analyze and use the data. Now the State Grid is also doing a meter reading platform. Where is the data going? This is a puzzle and it is proposed for everyone to think about. For the Water Department, the data needs to be copied for water charges. What is the data of the Water Secretary when reading the meter? If the State Grid copied the table, how did the Water Secretary get the data? The use of water meter data is one of charge, and one is used for analysis, including energy analysis, leakage analysis and so on. If the State Grid reads the meter, it is hoped that there will be no obstacles to the water company and the gas company, resulting in no data.
Communication mode 1, wired GPRS (both operators)
2, small wireless GPRS (both operators)
3, near-field wireless new operators 4, embedded operator communications module.
The profits of the profit distribution smart metering system are mainly three, one is the profit of the water meter itself, the second is the data maintenance profit, and the third is the installation profit. The profit sales of water meters have ended once, and data maintenance has been ongoing. If the water meter failure rate is relatively low, the installation profit will also increase. Four forms of copying need to consider the interests of all parties. Mechanical water meters have low profits, weak functions, and limited use and contribution of social resources. If electronic water meters can be used, not only can the profits of manufacturers be increased, but users can also benefit.
Looking to the future Because there are many operators of data, we can form such a situation in the future. Many operators are involved, such as the State Grid, Telecom, Huawei, etc., and all of their systems can be connected. As long as the water meter manufacturer embeds a certain type of module in the water meter, the data of the water meter can be transmitted directly without being installed. And it costs too much to maintain.
The Oil Control Valve (OCV) is a a critical part used in every engine that is fitted with variable valve technology (VVT). A single control valve will regulate the supply of oil to a designated VVT hub, to advance or retard the timing by altering the camshaft angle position. Controlled by the ECU, the OCV receives electrical signals, instructing it to adjust the oil flow as required, in accordance to current driving conditions.
From machinery to smart disclosure of status of meter reading in the water supply industry
[Chinese Instrument Network Encyclopedia Knowledge] In 1938, China produced the first water meter. By 1955, after the war, Chinese water meter production resumed, with Beijing, Tianjin, Shanghai and Wuhan predominating. In the 1960s, the country made a unified design of water meters. By the 1980s, the second standard design was carried out to unify the components of water meters. Since then, the cost of water meters has begun to drop dramatically. Before 1990, the total table was copied, followed by a household table. At present, 1.17 million households in Wuhan use one household per table.