Water supply network leakage is a common problem in the water supply industry, pipeline leakage, both a waste of valuable freshwater resources, but also to the water supply enterprises have brought great economic losses, it is necessary to take practical and effective measures to control.

　　Urban water supply network leakage rate refers to the urban network leakage and the ratio of total water supply. Leakage rate is closely related to the difference between production and sales, the difference between production and sales on the one hand, due to the measurement of bias, on the other hand, part of the water for various reasons can not be included in the measurement system. Specific factors affecting the following:

　　1) measurement bias, mainly divided into systematic error and random error. Systematic errors include: water statistics related instruments and equipment own error; due to the water supply and water sales cycle mismatch caused by the water statistics on the deviation; water statistics process due to the use of approximate formulas caused by the system internal error. Random error refers to the operator in the process of reading and recording the amount of water in the error triggered by the deviation.

　　2) not included in the measurement system, refers to the current situation of the original should be counted but not counted, fire protection and other urban utilities in the field of unpaid water behavior; private pipeline and other water theft; public water facilities, the amount of water can not be reasonably apportioned to the household; daily maintenance of the network in the process of the unaccounted for water consumption and so on.

　　First, the significance of flow monitoring meter value

　　1) can improve the water division of the network leakage (burst pipe) and other rapid response to deal with the ability to reduce the occurrence of running, risking, dripping, leaking, stealing. For example: meter reading cycle can not be found in a timely manner water meter damage time; the existence of a number of “humane table” phenomenon; verification cycle can not effectively determine when the measurement of inaccuracy; with the meter is not reasonable, resulting in measurement errors.

　　2) The Division of water can be introduced into the assessment mechanism, engineering, leak detection, inspection and other departments to carry out linked performance assessment, improve the management efficiency of the Division of water.

　　3) In the appropriate location to install pressure gauges, flow meters to monitor the data, to provide a basis for the adjustment of water pressure, through the flow, pressure data to analyze the leakage situation of the pipeline network, in order to quickly find the pipeline leakage points to provide a basis.

　　Electromagnetic water meter in the leakage control advantages

　　1, the general characteristics and advantages of electromagnetic water meter

　　Electromagnetic water meter adopts straight-through, will not block the card, no requirements for water quality; low pressure loss, reduce comprehensive energy consumption, reduce water supply costs; battery life of 6-10 years, the entire life of the machine is generally designed to be more than 10-15 years, greatly reducing the maintenance costs; wireless remote data transmission, intelligent measurement of the water meter and the data can be traced to put an end to the “table of human kindness “Phenomenon, to put an end to the loss of manual meter reading; meter itself is not affected by high flow rate and large flow, will not damage the meter; meter can measure the pipeline pressure, and can be transmitted at the same time the flow rate, pressure signals; not affected by the installation location, no need to install the straight pipe section; bi-directional measurement of the water flow; electromagnetic water meter range ratio is not affected by the changes in the water volume measurement; real-time reading uploaded to the meter of the current amount of water, real-time measurement of water consumption. Real-time reading of the current amount of water uploaded to the water meter, real-time monitoring of water consumption; to ensure the fairness of the measurement; data uploading initiative, no need to read the meter, reduce management costs.

　　2, electromagnetic water meter for small flow measurement advantages

　　When the water consumption in DMA sub-district is small, the starting flow rate of the meter is not reached, which usually leads to unmeasured assessment meter. Therefore, it is recommended that the assessment of the following 300 caliber table selection of wide-range electromagnetic water meter, in order to reduce the resulting measurement error. Electromagnetic water meter, especially in the small flow and large flow measurement advantages are obvious, can be compared with the same caliber mechanical meter measurement more than 5% -8%, directly bring economic benefits.

　　Electromagnetic water meter to monitor the minimum night flow, the minimum night flow data from the network leakage of water, background leakage and other parameters. For each pipeline master meter and each sub-district master meter to determine the amount of background leakage and network leakage water, for sub-district node flowmeter to generate the basis for leakage determination.

　　3、The advantages of electromagnetic water meter compared with mechanical water meter

　　Mechanical water meter adopts the principle of mechanical transmission, mechanical transmission is easy to block, and the mechanical structure is easy to damage, and pressure loss is large, the minimum flow rate Q1 is larger than the electromagnetic water meter, range ratio is small, usually not recommended for trade settlement table. Mechanical water meter starting flow is large, generally also not recommended for night time small flow monitoring, mechanical water meter by Q4 constraints, can not be used for high flow rate measurement, not recommended for DMA zoning, and mechanical water meter shortcomings electromagnetic water meter can make up for.

　　4、The advantages of electromagnetic water meter compared with ultrasonic water meter

　　Ultrasonic water meter using acoustic phase difference principle, very susceptible to external acoustic influence and bring measurement error; before and after the straight pipe section requirements of the former 20D after 5D, can not meet the harsh requirements of the field installation; higher requirements for water quality, once the pipe wall scaling will bring a large error; once the pipeline has bubbles, will bring a large flow fluctuation error, and electromagnetic water meter can make up for the disadvantages of ultrasonic water meter.

　　Third, the development trend of intelligent electromagnetic water meter

　　1, intelligent electromagnetic water meter industry chain development

　　The main body of the intelligent electromagnetic water meter industry consists of water meter manufacturers and solution service providers. Intelligent electromagnetic water meter plays an important role in water flow measurement, water billing, water use control, real-time monitoring, etc. In recent years, China's smart water meter industry has maintained a high growth trend with an annual compound of 32% due to:

　　1) the development of the Internet of Things, artificial intelligence and other emerging technologies;.

　　2)The great advantages of smart water meter products themselves in terms of measurement accuracy, real-time monitoring and data transmission.

　　3)Increased awareness of water resource protection among residents; and

　　4) The promotion of rural drinking water safety projects. As a benchmark enterprise in the smart water meter industry, Chuan Yi Sanchuan has always adhered to the development concept of scientific and technological innovation, customer first, and has continuously improved the measurement accuracy of the product, improved the service life of the battery, etc., which has greatly accelerated the development of the industry chain.

　　2, intelligent electromagnetic water meter new technology and new development of new features

　　1) At present, the electromagnetic water meter are using some circuit special design, reduce power consumption, not affected by the ambient temperature, can basically protect the battery life of more than 10 years;; and

　　2) All intelligent electromagnetic water meters are in accordance with the fully sealed structure, no moving parts, the real realization of IP68 protection.

　　3) Usually designed product life is 10-15 years, basically maintenance-free, reliability, stability is higher.

　　4) R-value from the conventional 250 to 630.

　　5) Q1 precision flow rate is reduced to below 10mm / s, to ensure that the measurement of small flows at night.

　　6) Zero stability control in the 0.2mm / s.

　　7)Realize U0D0 installation, completely solve the site installation location limitations.

　　8) Wireless transmission is more reliable, the use of strong shielding antenna, completely solve the water meter from the wellhead too deep or far away or soak the water transmission problems.