1、 Measurement principle:
The YG-JTDL15 tunnel ultrasonic wind speed and direction detector is specially designed and manufactured for online monitoring of wind speed and direction in tunnels. It adopts the principle of ultrasonic time difference method and installs two ultrasonic probes on the walls on both sides of the tunnel. When the airflow in the tunnel passes between the two ultrasonic probes, the ultrasonic waves obtain the wind speed and direction values in the tunnel by the time difference between their emitted beams back and forth. As the sampling area spans the entire tunnel, the detected wind speed has true representativeness.
2、 Main features:
Cast aluminum body, surface treated with anodization, suitable for harsh environments inside tunnels
The sampling area spans the inner lane of the tunnel, providing a more accurate reflection of the gas flow velocity inside the tunnel
Adopting the principle of ultrasonic detection, it is not affected by environmental temperature
Non contact detection, with no moving parts inside, reducing the failure rate
3、 Main technical parameters:
Measurement principle: Ultrasonic Time Difference Method
Installation method: Installation on both sides of the tunnel
Measurement range: Wind speed: -30 meters per second...+30 meters per second Wind direction: positive and negative
Measurement path: 5m... 50m
Measurement accuracy: ± 0.1 meters per second
Average time: 1 second
Analog output: 2-channel 4-20mA current output, maximum load impedance of 500 Ω
Switching output: 2-channel passive relay output
Digital interfaces: RS232, RS485
Communication protocol: ModBus
Supply voltage: 220VAC ± 10%, 50Hz/60Hz
Environmental temperature: -40 to+65 ℃
Protection level: IP66
Installation method: Installation on both sides of the tunnel