FYF Digital Wind Direction and Speed Alarm Device User Manual:

Product Overview:

FYFThe digital anemometer can measure the instantaneous and average values of wind direction and speed. This instrument has a reasonable structure and high degree of automation, and can continuously monitor instantaneous wind direction and speed. It is suitable for departments such as airports, ports, tower cranes, environmental protection, agriculture and forestry, fire prevention, etc. that need to pay attention to wind direction and speed for real-time monitoring and alarm of wind direction and speed.

One Main functions and features:

◎ Adopting photoelectric wind direction and speed sensors.

Apply microcomputer technology to control and process data for measuring wind direction and speed.

Display in digital form, directly showing the instantaneous value (3-second average), 2-minute average, and 10 minute average of wind direction and speed.

A disc composed of LED tubes displays the instantaneous and average values of wind direction direction.

Measure the maximum average wind speed for 3 seconds and 10 minutes in the past hour, along with the corresponding wind direction and occurrence time.

◎ Two levels of wind speed alarm function, and the alarm settings for both levels can be freely set.

II Main technical indicators

Wind speed measurement range: 0m/s to 60m/s

Wind speed measurement resolution: 0.1 m/s

Wind speed measurement accuracy: ± (0.3+0.03V) m/s (V is the indicated wind speed)

Wind speed sensor startup wind speed: ≤ 0.6 m/s

Wind direction measurement range: 0 ° to 360 °

Wind direction measurement resolution: 64 azimuth (5.625 °)

Wind direction display resolution: 3 °

Wind direction measurement accuracy: ± 3 °

Wind direction sensor startup speed: ≤ 0.5 m/s

Average period of wind parameters: 3 seconds, 2 minutes, 10 minutes

Disk wind direction display resolution: 32 azimuth

Instrument display content: 3-second average wind speed, average wind direction, maximum gust wind speed and corresponding wind direction in the past 3 seconds;

2Average wind speed, average wind direction, maximum gust wind speed in the past 2 minutes, and corresponding wind direction;

10Average wind speed, average wind direction, maximum gust wind speed in the past 10 minutes, and corresponding wind direction.

Alarm level: 2 (pre alert, alarm)

Alarm value setting range: any integer value within 0 m/s to 60 m/s

Remote sensing distance between sensor and host: maximum 200 meters

Power supply: 220 × (1 ± 15%) VAC 50Hz 15W

Serial Communication Method: Asynchronous Serial Communication (RS232)

Communication parameters: baud rate: 9600bps, word length: 8-bit, stop bit: 1-bit, no parity check.

Operating environment temperature: Sensor: -40 ℃~+50 ℃

Host: 0 ℃~+50 ℃

Usage environment humidity: Sensor: ≤ 100% RH

Host: ≤ 90% RH

Dimensions: Host: 250mm x 180mm x 165mm; (Width x Height x Depth)

Wind speed sensor: Ø 185mm × 250mm

Wind direction sensor: 577mm × 355mm × Φ 95mm

Weight: Host: 2.8kg

Wind speed sensor: 0.71kg

Wind direction sensor: 1.24kg

Installation beam and base: 3.5kg

III Working principle explanation:

1.Working principle of sensor:

The wind speed sensor adopts a three cup rotating frame structure. The three cup rotating frame has good linearity and a relatively simple structure. In order to improve its dynamic performance, we use engineering plastics to make the wind cup to reduce the distance constant of the wind speed sensor. The photoelectric method is used to convert the rotational speed of the wind cup into a frequency signal of electrical pulses for easy acquisition and processing of the whole machine. This is a contactless structure that is conducive to reducing the starting wind speed of the wind speed sensor and improving its reliability.

The wind direction sensor adopts a wind vane type wind direction sensor. The rotating shaft of the wind vane drives the photoelectric encoder to convert the wind direction into Gray code, which is then converted into binary code using software in the computer. The non-contact structure of the photoelectric encoder is beneficial for reducing the starting wind speed of the wind direction sensor and improving the reliability of the wind direction sensor.

2.Circuit Introduction:

This instrument is powered by AC 220VAC mains electricity, and a 5VDC DC power supply is generated by a power filter and an AC-DC converter to meet the needs of various parts of the instrument.

3.Measurement and processing of wind direction and speed:

The sampling period for wind direction and speed is 0.25 seconds (in accordance with the recommended requirements of WMO). The sampling is first carried out using the EMP sliding average method to obtain the 3-second average of wind direction and speed, which is the relationship between gust wind direction and wind speed. Then use the non sliding arithmetic mean method to calculate the 30 second arithmetic mean of wind direction and speed based on the 3-second average of wind direction and speed. Then, using the arithmetic mean of 30 seconds, apply the sliding arithmetic mean method to calculate the arithmetic sliding averages of wind direction and speed for 2 and 10 minutes, respectively, with a sliding step size of 30 seconds.

The instrument can calculate the maximum value and corresponding wind direction of the 3-second average wind speed from the beginning of this hour until now, as well as the occurrence time; The maximum value and corresponding wind direction of the 10 minute average wind speed, as well as the time of occurrence.

The instrument compares the measured gust value with the pre-set warning set value and alarm value inside the instrument. Once the gust wind speed exceeds the warning value (or alarm value), the instrument will issue a warning signal.

At each hour, the instrument will display the wind parameters for the hour (average values for 3 seconds, 2 minutes, and 10 minutes), the maximum value of the average wind speed for 3 seconds in the past hour, the corresponding wind direction, and the time of occurrence; The maximum value of the 10 minute average wind speed, corresponding wind direction, and occurrence time are stored in the extended EEPROM of the instrument for the upper computer to call.

4 Operation and usage instructions:

1.Installation and installation of instruments (refer to the instrument installation diagram)

The wind direction sensor and wind speed sensor are installed on the mounting bases at both ends of the installation beam. There are 12 core cable plugs corresponding to the wind direction sensor and 7-core cable plugs corresponding to the wind speed sensor inside the mounting bases. After correctly connecting the cable plug to the socket at the bottom of the corresponding sensor, install the sensor on the mounting seat, and then tighten the three M6 hex head bolts on the wind speed sensor to complete the installation of the wind speed sensor. Then install the support column at the bottom of the installation beam into the hole in the middle of the installation base, and fix it with 2 M8 hex head bolts. Next, fix the installation base with three M12 hex head bolts at the location where the user needs to install the sensor (the diameter of the three holes on the installation base is 13, evenly distributed on the circumference of 120, as shown in the figure). Then rotate the wind direction sensor to accurately align the north pointing rod on the wind direction sensor with the true north direction and tighten the three M6 hex head bolts on the wind direction sensor. The installation of the sensor is completed.