A fully automatic evaporative precipitation metering device

Abstract

The invention discloses a full-automatic evaporation and precipitation metering device. The full-automatic evaporation and precipitation metering device comprises a water circulating device, an automatic control and data acquiring system and a data analyzing computer, wherein the water circulating device comprises a water supplementing drum, a balance ring, a precipitation buffer case and a precipitation metering cylinder; a ventilation two-position three-way electromagnetic valve, a negative-pressure sensor and an electronic floating ball switch are arranged at the top of the water supplementing drum; the ventilation two-position three-way electromagnetic valve is connected with a ventilation pipe, an exhaust pipe and an intake pipe; the water supplementing drum is communicated with the balance ring through a first connection pipe and a water passing two-position three-way electromagnetic valve; the balance ring is communicated with a measuring evaporation device through a second connection pipe; the bottom of the balance ring is connected with an overflowing pipe; the bottom of the precipitation buffer case is connected with a first drain pipe; the first drain pipe is connected with a normally open two-position two-way electromagnetic valve; the bottom of the precipitation metering cylinder is connected with a second drain pipe and a positive-pressure sensor; the second drain pipe is connected with a normally closed two-position two-way electromagnetic valve. The full-automatic evaporation and precipitation metering device has the advantages of convenience for operation, low metering error of evaporation and precipitation, and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of water science and water resource engineering, and in particular relates to a fully automatic evaporative precipitation metering device. Background technique [0002] Scientific research institutions and production departments such as hydrogeology, environmental geology, water conservancy, and agriculture have long used the Martens flask named after the French physicist Mariotte as a device for measuring evaporation. This device is based on the balance of water communication, and measures the evaporation by manually measuring the height difference of the water column in the Martens flask at regular intervals. It is easy to make and can realize automatic replenishment of water for the control object, so it has been widely used in practice. However, when the object to be charged reaches more than 10 digits or even hundreds of digits, due to the complicated workload of manual counting, manual addition of wat...

AI Technical Summary

Problems solved by technology

In the direct precipitation measurement or the precipitation lagging measurement, measuring cups or tipping bucket measurement devices are currently used, and the above-mentioned devices cannot be used at all when the controlled object reaches more than a hundred digits.

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