Visibility instrument

1. Product Introduction of Visibility Instrument

The visibility instrument is also called the visibility detector. The visibility instrument is an instrument for measuring the visible distance of the atmosphere. The meteorological optical visibility is obtained by measuring the scattering of the infrared beam on the fulcrum of the particles in the air. It can also measure the wind direction, wind speed, temperature, and humidity along the expressway. , Atmospheric pressure, etc. for automatic monitoring. The FT-NJD10 visibility instrument is composed of several visibility monitoring stations distributed along the expressway. It automatically monitors the visibility, wind direction, wind speed, temperature, humidity, atmospheric pressure, etc. along the expressway, and transmits the monitoring information to the monitoring station in time. , for the reference of the traffic control system, it can send warning information in time under severe weather conditions, and inform managers and drivers in various ways to improve the driving level of the expressway.

2. Product features of visibility instrument

1. Visibility meter: It is composed of main components such as light transmitter, light receiver and microprocessor controller. The transmitter emits infrared pulsed light, and the receiver simultaneously detects the intensity of the pulsed light scattered forward by the aerosol particles in the atmosphere. All the measurement information is collected by the microprocessor controller and converted into Meteorological Optical Range (Meteorological Optical Range) through a special mathematical model algorithm MOR)

2. Temperature, humidity, wind speed, wind direction, atmospheric pressure, piezoelectric rainfall six-element integrated sensor

3. Wind speed and direction sensor: The top cover of the probe is hidden to avoid the interference of rain and snow accumulation and avoid natural wind blocking. The principle is to transmit continuously variable frequency ultrasonic signals, and detect the wind speed and direction by measuring the relative phase

4. Piezoelectric rainfall: The piezoelectric rain sensor uses PVDF piezoelectric film as the rain sensing device, and distinguishes the raindrop signal through the embedded AI neural network to avoid false triggering caused by interference such as sand, dust, and vibration.

5. Standard GPRS wireless transmission

6. Free choice of solar power supply and mains power supply

3. Technical parameters of visibility instrument

1. Visibility: Measuring principle Aerosol forward scattering, 5m-10km (≤2km error ±2%, 2Km~10km error ±10%), resolution 1m

2. Wind speed: measurement principle ultrasonic, 0～60m/s (±0.1m/s) resolution 0.01m/s

3. Wind direction: measurement principle ultrasonic, 0～360° (±2°); resolution: 1°

4. Air temperature: Measuring principle Diode junction voltage method, -40-60°C (±0.3°C), resolution 0.01°C

5. Air humidity: measuring principle capacitive, 0-100%RH (±3%RH), resolution: 0.1%RH

6. Atmospheric pressure: Measuring principle piezoresistive, 300-1100hpa (±0.25%), resolution 0.1hpa

7. Piezoelectric rainfall: measurement principle piezoelectric, 0-4mm/min (≤±4%), resolution 0.01mm

4. Introduction to cloud platform of visibility instrument

1. The CS architecture software platform supports direct observation of mobile phones and PC browsers without additional software installation.

2. Support multi-account and multi-device login

3. Support real-time data display and historical data display dashboard

4. Cloud server, cloud data storage, stable and reliable, easy to expand, load balancing.

5. Support SMS alarm and threshold setting

6. Support map display and view device information.

7. Support data curve analysis

8. Support data export form

9. Support data forwarding, HJ-212 protocol, TCP forwarding, http protocol, etc.

10. Support data post-processing function

11. Support running javascript script externally