Measurement device and measurement system using same

A measurement device comprising:

• a frame member which is an annular shaped inner frame;
• a support member which is an annular shaped outer frame, the frame member being disposed inside of the support member and being supported by the support member to be rotatable about a first axis line extending in a first direction;
• a detector including
• a detection body disposed inside of the frame member and supported to be rotatable relative to the frame member about a second axis line extending in a second direction orthogonal to the first direction, and
• a vane disposed on one end side of the detection body in a direction orthogonal to the second axis line, the vane receiving an air flow to rotate the frame member and the detection body, thereby directing an other end side of the detection body in the direction orthogonal to the second axis line toward an air flow upstream side;
• a wind direction sensor disposed in the detection body, the wind direction sensor detecting a wind direction as a direction toward which the other end side of the detection body in the direction orthogonal to the second axis line faces;
• and
• a wind speed sensor disposed in the detection body, the wind speed sensor detecting a wind speed of the air flow.