Introduction to the forward scattering visibility Observatory

Visibility is a response to the degree of atmospheric turbidity, and plays a key role in determining whether there is local fog, haze and other weather phenomena. It is not only used in meteorological departments for weather analysis, but also widely used in highway, aviation and other transportation departments as well as in the military.

The forward scatter visibility observatory includes a sensor, collector, stand and power supply.

In the forward scattering visibility observation device, the transmitter and receiver are separated by a certain distance and Angle. The receiver cannot receive the backscattered light directly emitted by the transmitter, only the atmospheric forward scattered light. The scattering coefficient can be obtained by measuring the intensity of the scattered light and thus the extinction coefficient can be estimated.

After the transmitter continuously emits infrared light pulses that are scattered by atmospheric molecules and particles, the receiver detects the scattered light of a certain volume of atmospheric samples in a certain direction and converts the light signal into an electrical signal. The control processing unit is used to process the electrical signal backwards to calculate the current meteorological optical range.

The sensor part is mainly composed of transmitter, receiver and control processor.

The collector consists of interface unit, central processing unit, storage unit, and display unit.

The support part is composed of column and base.

The power supply part is mainly composed of power supply, power surge arrester and battery.

RS-232 or RS-485 interfaces are used for communication. The communication distance can be extended through the external wireless transmission module. Wireless transmission modules include GPRS and so on. In the case of wireless transmission, multi-point transmission can be achieved.