Shown below is a wind speed and wind direction measurement system, with the following components:
HD53LS.S 2-axis ultrasonic anemometer with MODBUS-RTU output
HD35EDW-MB wireless data logger with MODBUS-RTU input
For this system, OTM also supplied a 2-meter-long stainless steel pole for mounting and wired/configured all instruments before delivery. The last step mechanical mounting was done by the end user. A USB dongle type base unit (HD35APD) was also included for manual downloading of monitoring data in a scheduled interval.
The instrument measures 3 velocity components (u, v, w velocity components) and 3 additional quantities (temperature, humidity, and barometric pressure), and calculates a number of derived quantities (wind speeds and directions, sonic temperature, and wind gust), as shown in the screen capture below:
10 × input channels (including temperature sensors, pyranometers, and heat flux sensors)
The system was fully integrated and configured by OTM. OTM will also provide 1.5 years of maintenance and data collection services.
The instruments are distributed in various locations of two buildings. Shown below are two important instruments of the system (left: a LoRaWan data logger; right: the LoRaWan gateway).
LR35WH (outdoor type general-purpose data logger)
LoRaWan Gateway (indoor type, with 4G connectivity)
A monitoring system was integrated and configured by OTM for on-site solar irradiance and daylight illuminance monitoring. The following Delta Ohm products were used:
A measurement system was integrated by OTM for on-site glass optical & thermal performance monitoring. The system uses off-shelf sensors and wireless data loggers and can be easily deployed for 24×7 glass performance monitoring projects.
Measurement principle
The system consists of two indoor measurement systems (reference room vs. test room) and one outdoor measurement system. Shown below are the system schematics.
Instruments in an indoor measurement system (in total two sets, one for the reference room and one for the test room)
Instruments in the outdoor measurement system (one set only)
The following quantities are measured:
Indoor side (4 quantities): daylight illuminance [lux], solar irradiance [W/m2], air temperature [°C] and glass surface temperature [°C]
Outdoor side (3 quantities): daylight illuminance [lux], solar irradiance [W/m2], air temperature [°C]
However, it is not possible to quantitatively evaluate glass optical & thermal properties rated under standard conditions (e.g. visible light transmittance, U-value, and shading coefficient) from the monitoring results. If such quantities are required, please consider our laboratory glass testing service.
Instruments
The following instruments from Delta Ohm were used in the monitoring system:
Necessary mounting accessories were included. The instruments can be conveniently installed on-site in less than 1 hour. Shown below is a photo of the outdoor side instruments in the demo installation.
Outdoor side instruments in the demo installation
Results
Shown below is a screen capture of some monitoring results (in the wireless data logger control software).
An in-house software can be used to automate the data processing part, as shown below.
