High performance wind speed detection system

Abstract

The invention discloses a high performance wind speed detection system belonging to the flow metering technology field. The flow field having advantages of wide range, high stability, and high uniformity can be generated by the system, and can be used for fast accurate detection of various wind speed measuring devices. By adopting the high performance wind speed detection system, the detection and the test of the wind speed measuring devices can be facilitated. The high performance wind speed detection system comprises an entrance segment, a first diffusion segment, a first corner segment, a fan segment, a transition segment, a second diffusion segment, a second corner segment, a rectification segment, a stabilizing segment, a flow contracting segment, and a test segment. The high performance wind speed detection system is characterized in that the entrance segment, the first diffusion segment, the first corner segment, the fan segment, the transition segment, the second diffusion segment, the second corner segment, the rectification segment, the stabilizing segment, and the flow contracting segment are sequentially connected together in an end-to-end manner to form a rectangle having an opening in a middle part of a lower long side; the opening part in the lower long side of the rectangle is the test segment, and the entrance segment and the flow contracting segment are respectively disposed on the two sides of the opening of the lower long side of the rectangle; the first corner segment and the second corner segment are respectively disposed on the short sides of the two sides of the rectangle.

Description

technical field [0001] The invention belongs to the technical field of flow measurement, and the system can generate a flow field with wide range, high stability and uniformity, and is used for fast and accurate detection of various wind speed measuring instruments. Background technique [0002] Atmospheric environment monitoring (such as the measurement of harmful smoke emissions from manufacturing enterprises), the detection of air quality in indoor ventilation environments (such as the measurement of the ventilation capacity of central air conditioners in large buildings), production safety (such as the measurement of the ventilation capacity of coal mines) Measurement), weather forecasting and other industries are widely used in a large number of air velocity measuring instruments. In addition, air flow rate is not only a measurement problem that must be solved in cutting-edge scientific research fields such as aerospace and precision measurement, but also one of the ind...

AI Technical Summary

Problems solved by technology

Although the wind speed detection device with LDA as the standard has a small wind speed measurement uncertainty, the price of LDA is extremely expensive, the system has a long stable time, the parameter setting during detection is cumbersome, the standard centering requirements are strict, and the detection results are affected by temperature, Affected by many factors such as the quality of flue gas generation and the fixed position of the inspected instrument, the emitted flue gas is also likely to contaminate the inspected anemometer

Many wind speed detection devices of domestic metering technology institutions have simple structures, poor flow field setting effects, and simple control parts. Most of the frequency conversion speed regulation methods use backward potentiometer adjustment methods. The range is narrow, usually the uniformity of the flow field is about 1.5%, the stability of the flow field is about 0.5%, and the range ratio is less than 1:70

The stable time of the wind field is long, and the overall performance of the device is not high, which seriously restricts the development of wind speed instrument detection and scientific research work

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