2. It can measure the flow of channels (circular channels, rectangular channels or other irregular channels).
3. It can measure the flow of natural rivers and streams.
4, can measure the sewage discharge channel or pipe (sewer) flow.
5, can measure the forward and reverse flow velocity and flow.
6. Instantaneous flow value and cumulative flow value can be provided.
7. Output signals: RS-485, Modbus, 4-20Ma current signal and multi-channel switching values.
8. The sensor can work for a long time in harsh field and sewage quality.
9. You can choose SMS or GPRS wireless module to realize remote telemetry.
10, the sensor shell is polycarbonate, and the protection level is IP68.
1 1 with built-in automatic temperature compensation.
12, which can adjust the blind area and shield the interference signal near the probe.
In many free surface conditions (not full of water, large flow (or small flow) and natural flow), the measurement of fluid flow is called open channel flow detection Because the open channel flow is large or small, the fluid is often corrosive or contains some impurities, so it is difficult to detect the flow with the general pipeline flowmeter. For example, in the fields of industrial enterprise drainage, hospital wastewater, agricultural irrigation water, urban underground waterway drainage and so on. Open channel flow detection, especially ultrasonic non-contact open channel flowmeter, is the first choice for flow detection instruments.
The ultrasonic open channel flowmeter cooperates with the corresponding Bashir tank to measure the liquid level height by using the propagation law of ultrasonic waves in the air, and continuously transmits the liquid level information to the upper computer, which automatically measures the instantaneous flow and accumulated flow through the operation system and stores it. The instrument adopts international advanced technology, can complete flow detection without contacting with fluid, and has perfect liquid level measurement function, control function, data transmission function and man-machine communication function. This machine is a flow measuring instrument that integrates ultrasonic transceiver sensor, servo circuit, temperature compensation sensor and compensation circuit unit, and integrates host, display, control signal output and serial data or analog output unit.
In the industrial field, instruments for measuring fluid flow are collectively called flowmeters or flow meters. Flowmeter is one of the most important instruments in industrial measurement. With the development of industry, the accuracy and range of flow measurement are increasingly demanding. In order to adapt to various purposes, various types of flowmeters have come out one after another, which are widely used in oil and gas, petrochemical industry, water treatment, food and beverage, pharmacy, energy, metallurgy, pulp and paper, building materials and other industries.
At present, flowmeter can be divided into: 1) positive displacement flowmeter according to structural principle;
2) Impeller flowmeter;
3) differential pressure flowmeter;
4) Variable area flowmeter;
5) electromagnetic flowmeter;
6) Ultrasonic flowmeter; Ultrasonic open channel flowmeter
7) Fluid oscillating flowmeter;
8) mass flowmeter;
9) Vortex flowmeter;
10) other flowmeters; (e.g. pulse flowmeter and momentum flowmeter)
This paper takes volumetric flowmeter, turbine flowmeter (typical impeller flowmeter), differential pressure flowmeter, variable area flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, vortex flowmeter (typical fluid oscillating flowmeter), Coriolis mass flowmeter and plug-in thermal mass flowmeter as the research objects, and analyzes the market.
The consulting company adopts a 360-degree research model, focuses on the whole world, and comprehensively studies the flowmeter market by integrating modules such as application industry, scientific and technological development, economy, competitive environment and industry users.
As shown in Figure 1, in 2008, the global flowmeter market reached 2.83 billion US dollars, an increase of about 3.9% compared with 2007. It is predicted that the global flowmeter market will reach $3.48 billion by 20 13. From 2008 to 20 13, the compound annual growth rate will reach 4.2%.
Two. Market influencing factors
1. Drivers
According to the forecast of the International Energy Agency (IEA), from 2007 to 2030, the global investment in energy infrastructure will be $26.0 trillion (in 2007 dollars). Among them, the power industry investment 13.6 trillion US dollars, accounting for 52.3% of the total investment. The current financial crisis will not affect long-term investment. By 2030, it is estimated that only maintaining the current energy supply capacity will require more than half of the global energy investment. By 2030, oil, natural gas and power infrastructure in many parts of the world will need to be replaced. In the long run, the foreseeable energy investment will bring great development space for the application of flowmeter in oil, natural gas and energy industries.
Facing the fierce competition environment, in order to meet the global demand for energy saving and emission reduction, users in various industries pay more attention to the operation efficiency of production plants and reduce energy consumption as much as possible to improve their competitiveness. Therefore, a large amount of investment is used to improve the automation level of the factory and the collection and real-time monitoring of field data, thus improving the process control efficiency of the factory. For example, in the oil, gas and energy industries, reliable fluid measuring equipment is needed in closed transportation facilities; The demand for high-precision flowmeters in chemical and pharmaceutical industries will inevitably promote the development of sensors and field devices (including flowmeters).
More and more electronic technologies, such as digital signal processing (DSP) and microprocessor, are introduced into flowmeter, which makes flowmeter have self-diagnosis function and can communicate with production control layer better. The improvement of performance better meets the needs of industry users and creates a larger market application space for flowmeter.
2. Inhibitory factors
The current global economic situation needs to be further boosted, and the demand for industrial products is not strong. Many industry users slow down their investment in new projects or suspend equipment upgrades, waiting for signs of global economic recovery. Therefore, in the short term, this will have a certain impact on the development prospects of flowmeter in its main application industries.
There are many manufacturers in the global flowmeter market and the competition is fierce. At the same time, flowmeter manufacturers are facing more stringent price requirements from industry users. In order to make products penetrate into the main industries that use flowmeters, price competition among manufacturers is inevitable. This phenomenon is common in emerging economies, especially in China. Price is often the most important determinant of buying behavior. In the long run, manufacturers pay more attention to price strategy, which leads to insufficient product innovation and hinders market development.
3. Main competitors in flowmeter market
In the world, the main manufacturers of flowmeters include ABB, Emerson, endres Hauser or E. H, Cronie, Siemens and Yokogawa, as well as General Electric, Honeywell and Invesco. The market concentration of flowmeter is high, and the top three manufacturers Emerson, E H and ABB account for nearly 50% of the whole market. Domestic flowmeters also occupy a place.
Four. Challenges faced by flowmeter
Traditional mechanical flowmeters, such as differential pressure flowmeter, volumetric flowmeter and variable area flowmeter, have been in the popularization stage, with fierce price competition, diminishing profit space, less technological innovation and relatively mature market. Frost & Sullivan believes that realizing product differentiation and customized production is an important breakthrough for manufacturers in the fierce competition in mature markets. According to Jost Sullivan's analysis of the needs of industry users, users hope that manufacturers can provide automation equipment that can bring tangible benefits to the production process. Users will have specific needs in the process of product application, such as: in the special environment of petrochemical industry, durable design and explosion-proof certification are needed; User's demand for Coriolis flowmeter with straight tube design, etc. How to effectively obtain the actual needs of users and improve traditional products is a big challenge to manufacturers' differentiated and customized production processes.
Guiding users to accept and use new technology flowmeters, such as ultrasonic flowmeters, electromagnetic flowmeters and thermal mass flowmeters, is another challenge for manufacturers to enlarge and strengthen the market. In fact, the new technology flowmeter mentioned above has been developed and applied as early as ten years ago. How to make customers realize that the use of new technology flowmeter can effectively improve production efficiency is an important topic for manufacturers.
In addition, while new technology flowmeters are being introduced into various industries, fast and effective after-sales service is also very important for manufacturers. Especially, the application of flowmeter based on Foundation Fieldbus and Profibus PA bus requires certain software technology, and effective service can provide users with more suitable solutions and be close to users.
Verb (abbreviation of verb) Development trend of flowmeter
The innovation from mechanical flowmeter to electronic flowmeter is one of the most important development trends of flowmeter. Electromagnetic flowmeter, ultrasonic flowmeter and vortex flowmeter all work by electrical principle, avoiding moving parts that need to be replaced in the work of mechanical flowmeter. At the same time, the self-diagnosis function is introduced into the flowmeter, which makes the flowmeter not only a simple measuring tool, but also can be used for system maintenance purposes, such as empty pipeline detection and self-inspection. Moreover, combined with the advanced communication technology in the electronic flowmeter, the controller can remotely obtain the flow data and historical data of the production site in real time.
According to Frost &; According to Sullivan's research, at present, about 89.0% of flowmeters in the world adopt mA HART communication protocol, because the installation difficulty and operation requirements of flowmeters adopting mA HART communication protocol are lower than those adopting Fieldbus protocol, and the introduction of Fieldbus system is not a small cost for users. However, with the continuous improvement of the automation level of industry users, they hope to get more information from traffic measurement besides traffic data, such as diagnosis information, state detection, etc., and these data transmission needs the support of field bus. Moreover, Siemens, Elmer and other manufacturers are making great efforts to realize the flow measurement technology of fieldbus protocol. It is believed that this will promote the application prospect of fieldbus protocol flowmeter in various industries.
In addition, wireless technology flowmeter is gradually accepted by users, and fluid measurement in harsh environment is a good application space for wireless technology. However, it will take some time for users to fully accept and popularize wireless technology flowmeter.