Triggering ultrasonic tipping bucket rain gauge

Abstract

The invention relates to a triggering ultrasonic tipping bucket rain gauge which comprises a rain collector, a funnel, a tipping bucket, magnetic steel, a reed switch, a ship bucket, a water inlet pipe, a metering cylinder, an ultrasonic water level measuring controller, an electric valve, a water outlet pipe, a base support and an outer barrel. The rain collector collects natural rain, the rain is gathered and flows into the tipping bucket through the funnel, the tipping bucket turns over and pours rainwater in the water inlet pipe and the electric valve through the ship bucket, the rainwater flows into the metering cylinder, the ultrasonic water level measuring controller measures the water level in the metering cylinder, and the water level is converted into rainfall and output. When the water level in the metering cylinder reaches a certain height, namely 10-mm rainfall, the ultrasonic water level measuring controller closes a water inlet valve to prevent the rainwater from entering the metering cylinder, a drainage valve is opened at the same time to drain the rainwater in the metering cylinder through the water outlet pipe, the drainage valve is closed after the rainwater is drained, the water inlet valve is opened, the rain flows into the metering cylinder to be measured, the steps are repeated for measuring, and the rainfall is accurately measured.

Description

[0001] technical field [0002] The invention belongs to the technical field of hydrological and meteorological measuring instruments, in particular to an ultrasonic rain gauge triggered by a tipping bucket for accurately measuring natural rainfall. [0003] Background technique [0004] The resolution and accuracy of existing tipping bucket rain gauges used for automatic rainfall monitoring are contradictory, that is, the tipping bucket rain gauge with a resolution of 1mm has a large error, while the tipping bucket rain gauge with a resolution of 0.1mm has a larger measurement error due to changes in rain intensity. Error, up to ±20%. [0005] For a long time, the rain gauges used by hydrological and meteorological departments are rain gauges, siphon rain gauges or tipping bucket rain gauges. Because rain gauges and siphon rain gauges are not suitable for rain monitoring automation, tipping bucket rain gauges are widely used. There are four kinds of tipping capacity of t...

AI Technical Summary

Problems solved by technology

The diameter of the water storage tank in this design is the same as that of the upper part of the water receiver, and the accuracy of water level observation cannot meet the requirement of 0.1mm. On the other hand, when the cumulative rainfall of the water storage tank reaches 500mm, it is necessary to manually change the bucket and pour water, which is not conducive to long-term stable measurement.

[0011] The Meteorological Department of Henan Province improved the ultrasonic rain gauge and added an ultrasonic water level measurement barrel to improve the measurement accuracy. However, two solenoid valves were used, which often failed. And because there is no rain sensor, the ultrasonic water level gauge needs to work continuously even when it is not raining, which increases the power consumption of the equipment and shortens the service life

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