Siphon Rain Gauge With Liquid-Level Sensing for Rainfall Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rain gauges suffer from underestimation of precipitation due to direct discharge of rainwater during high-intensity rainfall, buffer funnel clogging, sensitivity issues with magnetic reed switches, and environmental debris interference, leading to errors exceeding ±3% tolerance.
Innovation Solution
A siphon rain gauge system that collects rainwater in a measuring cup and uses a sensing unit to detect liquid level height or drainage duration, eliminating the need for a buffer funnel and magnetic reed switch, and utilizing an MCU for accurate rainfall calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a buffer funnel is used to control errors in conventional rain gauges, then measurement accuracy is improved, but the device becomes prone to clogging and damage from debris
Solution Approach 1:
The patent removes the buffer funnel component entirely from the rain gauge system. Instead of using a buffer funnel to control errors, the invention uses a tipping bucket mechanism that directly measures rainfall volume without requiring a buffer funnel, thereby eliminating the clogging issue while maintaining measurement accuracy through alternative error control methods
Solution Approach 2:
The patent introduces a siphon tube as an intermediary component that connects the tipping bucket to the collection container. This siphon tube mechanism allows rainwater to be transferred without passing through a buffer funnel, preventing debris clogging while maintaining proper water flow control and measurement accuracy
2Measurement precision
If a magnetic reed switch is used to detect rain gauge bucket tipping, then measurement is enabled, but sensitivity decreases due to environmental debris
Solution Approach 1:
The patent replaces the magnetic reed switch (electromagnetic sensing) with a mechanical contact switch or optical sensor that detects the tipping bucket's movement through mechanical contact or light blockage. This substitution eliminates the sensitivity degradation issue associated with magnetic reed switches and environmental debris, while maintaining reliable tipping detection capability
Solution Approach 2:
The patent uses a visual indicator or optical sensor that creates a detectable signal when the tipping bucket reaches a certain position. Instead of relying on magnetic field changes that can be interfered with by debris, the system uses a direct visual or optical copy of the bucket's position to trigger the measurement signal, ensuring consistent detection accuracy
3Device complexity
If rainwater is directly discharged from the tipping bucket, then measurement simplicity is maintained, but rainfall amount is underestimated during high-intensity rainfall
Solution Approach 1:
The patent ensures continuous and complete discharge of rainwater from the tipping bucket through a properly designed siphon tube system. The siphon tube maintains continuous water flow from the tipping bucket to the collection container, preventing any water residue that would cause underestimation, while keeping the overall mechanism simple and effective
Solution Approach 2:
The patent incorporates a sensing unit that detects when the tipping bucket is empty or when the collection container reaches a certain water level. This feedback mechanism ensures complete discharge by triggering additional tipping bucket activations or stopping the measurement process, thereby preventing underestimation of rainfall amount while maintaining system simplicity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system reduces errors to within ±3% tolerance by accurately measuring rainfall intensity across varying conditions, enhancing measurement frequency and reducing hardware replacement costs.
Implementation Method 1
The siphon drain pipe is connected to the measuring cup and discharges the rainwater from the measuring cup via the siphon principle
Data Source
AI summary
A siphon rain gauge system, comprising: a rain collector, a measuring cup, a siphon drain pipe, and a sensing unit. The rain collector provides an inlet for rainwater to enter and an outlet for collected rainwater to flow out. The measuring cup has a drain pipe directly connected to the outlet of the rain collector to collect the rainwater flowing out from the outlet. The siphon drain pipe is connected to the measuring cup for discharging the rainwater from the measuring cup. When the liquid level height of the rainwater in the measuring cup is greater than siphon drain pipe, the siphon drain pipe discharges the rainwater from the measuring cup. The sensing unit is disposed within the measuring cup or outside the measuring cup for sensing the liquid level height of the rainwater to generate a sensing signal, and the system calculates rainfall based on the sensing signal.