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Hub: 90/100/120/130/140/200/225
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The 105th year of technological innovation Existing water meters are made of castings with lower production costs and are purely analog structures that do not use electricity at all. When the family uses tap water, the water flow drives the internal blades to rotate, driving the readings to change and record the water consumption. Not only water meters, but also equipment such as clean water, have not seen major technological innovations in the water supply industry for more than one hundred years. The appearance of smart water meters can be said to be a major event in changing the history of water supply.
The advantages of smart meters are the same as smart meters and smart gas meters. There are two major advantages, first of all, the efficiency of meter reading operations. Now, the meter reading needs to be done manually and the water meter readings of each home are recorded visually every 2 months. There are approximately 800,000 water meters in Kobe city, and the cost of meter reading business is as high as about 350 million yen per year. With the improvement of the awareness of social security, the entrances of large high-class apartments have been automatically locked, and the meter readings have to be reported to the apartment managers in advance, which increases the workload. If you use a smart meter that automatically sends data through wireless communication, you can cancel manual meter reading.
The second advantage is the automatic detection of water leakage. Old water pipes are more likely to leak due to damage, but it is extremely difficult to detect trace leaks. In the absence of tap water at home, if the water meter reading changes, there is a possibility of water leakage. The smart water meter can detect such situation in real time.
The validation trials to achieve greater difficulty than the electricity meters and gas meters in Kobe City are scheduled to continue until March 2017. The communications company NTT West Japan, the system company MIRAIT Technologies, and the SENSUS three companies that manufacture smart meters will participate in the cooperation. The smart water meter will know the user's water consumption in detail and use the built-in communication function to send water data to the cloud management system.
In order to carry out experiments, smart meters were installed in nine places in downtown Kobe. Between the experimental base station (experimental test station) and the smart meter, a wireless network of 270 MHz band is used to transmit data. The 270 MHz wireless band used to be a frequency band used by a pager service, and has a feature of easily bypassing an obstacle or the like.
As mentioned earlier, smart water meters have the same advantages as smart meters and smart gas meters. However, at the same time, smart water meters also have a problem of “the difficulty of practical application is significantly higher than that of smart meters and smart gas meters†(NTT West Japan cloud business PT long pig warehouse Yongzheng).
The specific difficulties include power supply problems and water pipe installation site issues. Unlike existing water meters that do not use electricity, smart meters require electrical power. However, most of the water meters are buried underground. It is not realistic to increase power supply equipment. For this reason, the smart meter used in the verification experiment in Kobe City is equipped with a battery that can be used for a long time.
In addition, the existing water pipes are installed underground. Although there are well covers, sand and dust are easy to enter and will be flooded when it rains. Therefore, smart water meters need to have extremely high durability compared with electricity meters and gas meters.
The smart water meters produced by Katsuhise can solve the above two problems. Therefore, Kobe City's verification experiment decided to use the company's products. The model has been selected for continuous use for more than 10 years and has a strong water resistance.
A device installed in a house for use in a smart water meter verification experiment in Tokyo. Kobe City has carefully selected the installation site in order to examine the feasibility of the practical use of a smart water meter in various aspects. Among them are representative venues: elementary school stadiums often filled with sandy soil; taverns that are blocked by high-rise buildings and are not easily reached by radio waves; and Kobe airports that are far from experimental test stations.
It also deliberately created a continuously flooded environment for some smart water meters to verify whether the water meters can work properly and send data under such circumstances.
However, Takashi Hiroyuki, head of the water supply unit of the water distribution division of the Kobe Municipal Waterworks Bureau Division, said: "The time for practical use is still not clear." This is because, in addition to the technical difficulty, smart meters also have problems in terms of cost.
In terms of technology, the city will examine the feasibility of practical application based on the data collected during the experiment. In terms of cost, we will explore practical time by studying the rise in labor costs in the future and the realization of low-cost time driven by popularization and mass production of smart water meters.
From August 2015, the Tokyo Metropolitan Government also set up smart water meters in about 60 places in Toei and started a verification experiment. For practical purposes, Tokyo has the same opinion as Kobe City.
According to the Tokyo Metropolitan Bureau of Water Resources, “The purpose is to test the functions that can be achieved. As for the practical time, it can only be said that it has not yet been determinedâ€.
The experiment was carried out in Tokyo. It used the near-field wireless communication equipment installed on the existing water meter to interact with the devices installed in the house to collect water quantity data. Specifically, a wireless communication device that supports short-range communication, supports 920 MHz, and the like is installed on an existing water meter installed in a government office or the like. The amount of water sent by the device is collected into the devices installed in the house. Then, the device in the house uses the mobile phone signal to send the received water volume data to the system.
The Tokyo Metropolitan Government is working with OKI and NTTPC Communications to carry out a verification experiment, which is scheduled to continue until the end of January 2016. In addition to remote monitoring of usage and leakage of tap water, smart metering is also considered to provide care services for groups of elderly people living alone.
Local waterworkers in Kobe City and Tokyo Prefecture all believe that for practical use, “the key is sharing meters with the same smart meters and metersâ€.
If the power supply, gas supply, and water supply companies join hands and share a smart meter, a total of three smart meters can be combined into one. Compared with their own independence, setting and operating costs will undoubtedly be reduced.
Of course, power companies and gas companies are private enterprises, and it is difficult to keep pace with the water supply operations operated by local governments. Moreover, there are indeed many issues that need to be resolved, including the cost and the division of responsibilities. However, Japan’s national finance and local finances are already tight. As the population decreases, tax revenues will continue to decrease. Under such circumstances, if we can maintain a high-quality water supply infrastructure at a low cost, we should combine the power of the government and the people. Solve these problems together.
ã€Industry Focus in China's Instrumentation Network】 Meters installed by households in Kobe City of Japan can be traced back to Meiji 44 (1911). “The history of a simulated water meter that has been used for more than a hundred years may change,†said Anung Xiaoming, head of the business department of the Kobe Municipal Waterworks Bureau, who emphasized the significance of the smart water meter verification experiment that the city plans to launch in 2015. Following electricity and gas, Kobe, Tokyo, and other places began to promote the intelligentization of water meters. Currently, they are collaborating with companies to conduct verification experiments.
Tokyo also set up smart meters for verification in 60 places