Shandong Tianhe Environmental Technology Co., Ltd
lixinghua@yunjingtianhe.com
13276363035
Room 206, Building 1, Weifang High tech Zone Optoelectronic Industry Accelerator (Phase I), No. 155 Optical Circuit, Weifang High tech Zone, Shandong Province
Working principle: The weighing rain gauge is based on weighing principle technology and uses high-precision weighing sensors to measure "precipitation increment". It can monitor all types of precipitation, including solid (snowfall), liquid (rainfall), and solid-liquid mixed states (sleet, freezing rain).
Hardware configuration: The weighing rain gauge mainly consists of a main control device, a rain receiving port, a water collector, a drainage device, a weighing sensor, a protective shell, an installation base, a windproof ring, etc.
Compliant with national standards:
The SL/T 811.4-2021 "Precipitation Observation Instruments" standard for weighing rain gauges in the water conservancy industry, issued by the Ministry of Water Resources of the People's Republic of China.
The QX/T 320-2016 "Weighing Precipitation Measuring Instrument" standard for weighing rain gauges in the meteorological industry, issued by the Meteorological Administration of the People's Republic of China.
Power supply: 10~30V DC
Average power consumption:
High cold type: 30W (equipped with heating module, power supply DC12V)
Communication method:
Pulse type: The user calculates the rainfall amount during different time periods based on the corresponding resolution of the rain gauge by obtaining the number of pulse on-off times of the rain gauge.
RS485 type: The rain gauge uses Modbus RTU protocol and comes with a built-in clock. It has multiple pre-defined rainfall programs, including "daily rainfall", "minute rainfall", "yesterday rainfall", "total rainfall", "rainfall intensity" and other parameters. Users can directly read the above rainfall data by specifying 485
Resolution: 0.1mm/0.2mm/0.5mm/1mm
Rain intensity range: 6-1800mm/h
Typical accuracy:
When the precipitation is ≤ 10mm, the maximum allowable error is soil 0.2mm;
When the precipitation is greater than 10mm, the maximum allowable error is ± 2%;
Working environment: -35 ℃~+65 ℃, 0% RH~95% RH, non condensing
Main control device:
Collect real-time data from weighing sensors.
Convert the obtained weight information into pulse and RS485 output signals.
When the water volume reaches the set threshold, control the drainage device to automatically drain.
The temperature on site is relatively low, so control the heating equipment to avoid the occurrence of rain, snow, and ice formation.
Chengyu Mouth:
The depth of the inner wall of the rainwater outlet is greater than 100mm, which ensures that the rainfall entering the rainwater outlet will not splash out.
The inner diameter of the rainwater inlet is φ 200+0.6mm
Sharp edge angle of 40 ° to 45 °
Water collector:
The water collector is located below the rainwater inlet to collect precipitation and is a stainless steel cylindrical structure.
The default capacity of the water collector is 28L, and it supports linkage with the main control device to control automatic drainage.
Drainage system:
When the water volume reaches 80% of the capacity of the collector, the drainage device starts to control automatic drainage.
The drainage process of the drainage device lasts for about 1 minute, during which no rainfall is measured. After the drainage is completed, about 1-2L of liquid will remain in the collector.
Due to the mixture of antifreeze and precipitation, some antifreeze will be discharged during the process. If there is a drainage phenomenon in winter, pay attention to replacing the antifreeze.
Evaporative suppression oil, due to its low density, floats on the surface of the liquid and will not be automatically expelled with the liquid.
The weighing sensor:
The weighing components use piezoelectric weighing sensors to sense pressure changes and convert precipitation increments into corresponding precipitation outputs.
The weighing sensor adopts a closed structure and a load-bearing weighing method.
Protective shell:
The protective shell can protect parts such as the precipitation weighing unit and precipitation data processing unit.
The protective shell is made of stainless steel material and coated with a white matte anti salt spray corrosion coating on the surface.
The shell design is in a "convex" shape, which can serve the functions of windproof, reducing evaporation, and increasing precipitation capture
Installation base:
The installation base is convenient for loading and unloading, and plays a certain protective role for the weight sensor, drainage device, and main control device.
The installation base should be firm and reliable, and should have vibration reduction and leveling functions.
Made of stainless steel material, with a white matte anti salt spray corrosion coating sprayed on the surface.
Windproof ring:
The windbreak ring consists of a circular keel, a T-shaped frame, and a single windshield piece, with a white matte anti salt spray corrosion coating sprayed on the surface.
In sites where solid-state precipitation monitoring is required, the installed weighing rain gauge should be equipped with a windbreak ring.