Mark Smolinski - Wind Speed Monitoring System

Objective is to construct, calibrate, and document a system for measuring wind speed using deployable sensors, with data collected using a multichannel analog-to-digital converter system that runs on a high end computer. 

Sensor:

Sensor is revision P wind sensor from Modern Devices, https://moderndevice.com/products/wind-sensor-rev-p . 
Schematic diagram is here: WindSensorRevPschematic.pdf

Sensors will be mounted inside carbon fiber tube with a clamp at other end for DB-9 connector. 

Device needs 12V at 40 mA. So eight of them draw 320 mA, round that up to 500 mA and we need a 12V, 10W power supply. 

Assembly: 

1. cut carbon tube in half.
2. attach DB-9 connector to flange with two 4-40 screws. Use standoffs if it doesn't clear ID.
3. feed ribbon cable through tube, and plug other end into sensor. Wire will have to be folded carefully into tube. 
4. test electrical connections and functionality
5. glue in both the connector flange and the sensor using 5 minute epoxy or silicon RTV
6. add mount clamp at midpoint

DB-9 connector on sensor is F. Need long-ish cables to run inside the dome, running to DB9 connector at computer end. 

Expected voltage output vs. temperature: 

T(C).      V_temp output

-10.0000    0.2040
   -9.0000    0.2236
   -8.0000    0.2432
   -7.0000    0.2628
   -6.0000    0.2824
   -5.0000    0.3020
   -4.0000    0.3216
   -3.0000    0.3412
   -2.0000    0.3608
   -1.0000    0.3804
         0    0.4000
    1.0000    0.4196
    2.0000    0.4392
    3.0000    0.4588
    4.0000    0.4784
    5.0000    0.4980
    6.0000    0.5176
    7.0000    0.5372
    8.0000    0.5568
    9.0000    0.5764
   10.0000    0.5960
   11.0000    0.6156
   12.0000    0.6352
   13.0000    0.6548
   14.0000    0.6744
   15.0000    0.6940
   16.0000    0.7136
   17.0000    0.7332
   18.0000    0.7528
   19.0000    0.7724
   20.0000    0.7920
   21.0000    0.8116
   22.0000    0.8312
   23.0000    0.8508
   24.0000    0.8704
   25.0000    0.8900

Output of wind sensor goes from 0 to 3.3 Volts, nonlinear response. 

Software: 

We want to use an array of 8 of these (ideally) in the of dome with two quantities measured per device. That means we need a 16-channel A/D converter, running at 16 bits. LabJack T7-Pro is one option. Let's start with that. 

Need to store data at one reading per second, perhaps averaging over multiple readings. It would be nice to provide a panel with windspeeds,see for example https://pi-plates.com/displaying-data-with-a-virtual-meter/