Product Overview:

The boundary layer scintillation meter can measure atmospheric turbulence, heat flux, and crosswinds at large spatial scales, with a measurement scale of up to 5 kilometers. The average of spatial measurements gives it an advantage over traditional point measurement methods. This large aperture scintillation instrument utilizes its unique design process to achieve higher measurement accuracy and is easy to install. By considering changes in transmission, the device can even perform measurements under unfavorable or changing visual conditions. The data measured by the device is stored in a separate processing unit, which can be displayed in real-time by a computer (such as a laptop) or read from memory. BLS900 can adapt to various climate conditions and can work with batteries.

working principle:

The working principle of BLS900 is based on the optical phenomenon of scintillation caused by fluctuations in the refractive index of air. A well-known example is the twinkling of stars.

The BLS900 consists of a transmitter and a receiver located 5 kilometers apart. The transmitter consists of two disks arranged with 450 light-emitting diodes, and the receiver calculates the apparent intensity fluctuation value. Due to the large transmission and reception apertures, the so-called "infiltration" and "internal contraction effects" can be ignored.

BLS900 measures the structural constant C of refractive index fluctuations by calculating the changes in intensity fluctuations_n²The crosswind speed is determined by the time delayed cross covariance between two beam signals. By C_n²Obtain C_T²And through the application of natural convection scale analysis, the precise value of the average heat flux along the propagation path is calculated by software.

Product features:

No need for transmitter adjustment

An emission angle exceeding 10 ° eliminates all calibration requests for the transmitter.

Accurate data

There is no mutual influence between the instrument system and the measurement target on the optical path, and large-scale spatial averaging provides convenience for obtaining accurate and useful information.

low noise

Using a large number of light-emitting diodes as emission sources, the noise generated by the emission pulses is very low compared to the noise generated by using a single emission source system.

Strong seismic resistance

An important source of measurement error in traditional scintillation meters is the oscillation of the emission device caused by wind. Due to the wide emission angle and relatively small illumination gradient of BLS900, these errors can be ignored.