34 results about "Precipitation measurement" patented technology

The invention discloses a precipitation measurement method and device based on a passive impulse method, and belongs to the technical field of precipitation measurement. The method comprises the steps: setting a semispherical cover which is fully provided with force sensors, wherein different rain drops fall on the semispherical cover, and because the semispherical cover has radian, the impulses brought by the rain drops at different positions are different; the impulses, which are measured by a force sensor, in a direction perpendicular to a falling point gradually decrease from the top of the sphere to the periphery, and when the falling direction of the rain drops is tangential to the semispherical cover, the rain drops cause no impulse to the semispherical cover, and at this moment, the tangential direction is the falling direction of rain drops. The method also comprises the steps: employing a panel which is fully provided with the force sensors for calculating the total impulse of the rain drops according to the vertical impulses measured by the force sensor after the falling direction of the rain drops is obtained; calculating the mass of rain drops according to the momentumconservation and impulse conservation, wherein the motion of rain drops is considered to be constant speed motion in default when the rain drops fall to the ground, and acquiring the precipitation through the density of rainfall. The method ingeniously achieves the acquisition of the real-time rainfall without storing the rainfall.