What is a double tipping bucket rain gauge?

Rainfall is an important meteorological parameter in agricultural cultivation, building construction, meteorological observation and other industries, and the accurate observation of rainfall is crucial. With the rapid development of science and technology, the means of observation of rainfall is also gradually enriched, satellites, radar and other advanced means are also gradually applied to the measurement of rainfall, but these measurement means can only be applied to the regional measurement and assessment of rainfall, the local accuracy or to rely on the ground meteorological station precipitation observation instruments, such as tipping bucket rain gauge, double tipping bucket rain gauge, this article talks about for the double bucket This paper is about the double bucket rain gauge.

First, working principle of double tipping bucket rain gauge

Double tipping bucket rain gauge is an improvement of the single tipping bucket rain gauge, due to the single tipping bucket rain gauge in the process of tipping the tipping bucket continues to be injected into the tipping bucket, precipitation in the rainfall difference is large, which will bring errors, so produced a double tipping bucket rain gauge. The use of multiple tipping buckets allows natural precipitation of varying intensity to be injected uniformly into the metering tipping bucket.

Double tipping bucket rain gauge, precipitation first into the upper tipping bucket, accumulated to a certain amount, the precipitation into the measurement tipping bucket, the different intensity of natural precipitation, regulate the intensity of precipitation for a more uniform, to reduce the intensity of precipitation due to different measurement errors;

Double tipping bucket rain gauge work process: water carrier to collect precipitation through the funnel into the upper tipping bucket, the upper tipping bucket to bear the amount of water to reach the upper limit (0.2mm/0.5mm), the flip, through the collection of funnels and throttling pipe into the measurement of the tipping bucket, measurement of the tipping bucket flip once for the amount of precipitation of 0.1mm/0.2mm/0.5mm, and then the rainfall by the measurement of the tipping bucket to enter the tally tumbler in the central part of the tumbling tumbler is equipped with a A small magnet in the middle of the counting hopper, the top of the magnet is equipped with a reed switch, the counting hopper turns over once, the reed switch closes once, generating a pulse signal sent to the collector in the counter for counting, each count for 0.1mm/0.2mm/0.5mm precipitation.

Second, double tipping bucket rain gauge structure

Double tipping bucket rain sensor is divided into the upper and lower two layers, mainly by the water bearer, the upper tipping bucket, the collection funnel, measuring tipping bucket and reed switch and other components. When the precipitation to a certain amount, the transition hopper flip, precipitation through the throttle tube all flow into the measurement of the hopper, the role of the throttle tube is to control a certain rain through the speed (rain intensity), at this time the measurement of the hopper does not flip, precipitation continues to be injected into the instrument, the transition hopper to a second flip, precipitation once again through the throttle tube into the measurement of the hopper. During the inflow process, the metering hopper is turned over, which generates a pulse signal. Then the pulse signal is transmitted to the collector through the transmission line.

Third, the advantages of double tipping bucket rain gauge

1、Adjust the flow rate to reduce the error

Double-dipper rain gauge can be on the hopper and measuring hopper, will be different intensity of natural precipitation adjusted to a more uniform intensity of precipitation, in order to reduce the intensity of precipitation due to different measurement errors caused by different, so that the data is more accurate.

In addition, the tipping bucket rain gauge due to the intensity of rainfall and flow rate is not uniform, there is the possibility of rain splash, resulting in a reduction of rainfall measurement; and double tipping bucket rain gauge on the collection funnel can collect the splash of rainwater to reduce the error.

Fourth, the maintenance of the double tipping bucket rain gauge and maintenance

1、Routine maintenance

Double tipping bucket rain gauge needs to be applied to outdoor long-term, the use of the environment is quite harsh, so the instrument's rain-bearing mouth of the inner wall should be often wiped with a soft cloth to keep the rain-bearing mouth clean, such as the rain-bearing mouth of the leaves and other foreign objects should be cleaned up in a timely manner, to maintain a smooth waterway. When the instrument is not used for a long time, the instrument should be covered with a cover to protect the rain bearing mouth;

Rain gauge long-term work generally one month to clean up once, three months must be cleaned up once;

2、Tipping bucket maintenance

Hopper is the key component of this instrument, it directly affects the measurement accuracy of the instrument, over time, the inner wall of the hopper will deposit a little dust or oil, therefore, the hopper should be cleaned. When cleaning, the inner wall of the tipping bucket can be repeatedly rinsed with water or gently brushed with a degreasing brush, it is strictly prohibited to wash the inner wall of the tipping bucket with hands or other objects.

The use of double tipping bucket rain gauge can more accurately understand a region's precipitation, but also help us to better arrange the production of life.

At present, the double tipping bucket rain gauge is widely used in meteorology, agriculture, forestry, scenic spots, flood control, weather stations, factories, intelligent building systems, warehouses, museums, laboratories, greenhouses and other applications, which brings convenience to various fields.

Tipping bucket rain gauge data sheet

NBL-W-ARS-Tipping-bucket-rain-gauge-instruction-manual.pdf

NBL-W-RS-Rain-sensors-instruction-manual-V4.0.pdf