Rainfall sensor

Abstract

The invention relates to a rainfall sensor, which comprises an outer cylinder, a rain bearing opening located at the top part of the outer cylinder, a first collecting funnel, an anti-blocking device located at the bottom part of the first collecting funnel, a second collecting funnel located below the anti-blocking device, a measurement sensing switch located below the second collecting funnel, a first water collecting funnel located below the measurement induction switch, a weighing container located below the first water collecting funnel, a weighing induction unit arranged in the width direction of the weighing container, a load component located at the bottom part of the weighing container, a second water collecting funnel located below the load component, a base plate located at the bottom part of the outer cylinder, a vertical plate arranged on the base plate, and a pressing unit fixed on the vertical plate. The rainfall sensor provided by the invention reduces usage of tubular and porous structures, reduces locking circumstances, uses the load component to act as a weighing device, measures the rainfall by adopting resistance strain weighing technologies, and can improve the measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a rain sensor. Background technique [0002] The rain sensor (rain gauge) is the main equipment used for rainfall observation, which can measure the rainfall and rain intensity per unit time. At present, the instruments and equipment used for automatic rainfall measurement are mainly tipping bucket type (including single tipping bucket and double tipping bucket) and weighing type rain sensor in terms of measurement methods. During the use of common rain sensors, due to the rainwater mixed with various impurities such as dust and grass seeds, the tipping bucket rain sensors are often blocked, and more complicated manual cleaning is often required. Once blocked, the accuracy of the rain sensor will exceed the allowable range, and even cause its damage. Although most of the existing weighing rain sensors do not have the problem of clogging, the capacity of the rain collection ...

AI Technical Summary

Problems solved by technology

During the use of common rain sensors, due to the rain mixed with various impurities such as dust and grass seeds, the tipping bucket rain sensors are often blocked, and more complicated manual cleaning is often required

Once blocked, the accuracy of the rain sensor will exceed the allowable range, and even cause its damage

Although most of the existing weighing rain sensors do not have the problem of clogging, the capacity of the rain collection container is limited, especially when the rainfall is measured, frequent manual drainage is required, and more maintenance and manual intervention are still required to ensure its continuous normal operation

[0003] The tipping bucket rain sensor is determined by its principle. Due to the limitation of the measurement accuracy of the load cell, when there is a blockage, the measurement accuracy will be greatly reduced, which will directly affect the accuracy of its continuous observation and data. maintenance tasks, the cost of operation and maintenance is significantly increased

In addition, the effective maximum rain intensity measurement range of the existing tipping bucket rain sensor with a resolution of 0.1mm is basically less than 4mm / min, which cannot meet the short-term heavy rainfall measurement such as urban waterlogging monitoring, mountain torrent geological disaster monitoring, etc.

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