Raw Material Feed Pressure Estimation for Stable Supply
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Solution Overview
Problem
Conventional raw material feeding devices face challenges in accurately estimating the remaining amount of raw materials due to the high cost and durability issues of installing a remaining amount sensor, often relying on processing time or supply frequency to determine replacement timing.
Innovation Solution
A raw material feeding device with a configuration that includes a raw material container, upstream and downstream paths, a bypass path, and pressure gauges to estimate the remaining amount based on pressure detection values during the circulation of carrier gas, using a remaining amount estimation unit to calculate the raw material quantity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a remaining amount sensor is installed in the raw material container, then the remaining amount of raw material can be detected accurately, but the cost and durability issues arise
Solution Approach 1:
The patent introduces a pressure gauge as an intermediary device installed in the gas path (upstream or downstream of the raw material container) to indirectly measure the raw material remaining amount. Instead of placing a sensor directly in the raw material container, the pressure gauge measures pressure changes of the carrier gas or raw material gas in the gas path, which correlates with the raw material remaining amount. This intermediary approach avoids direct contact between the sensor and raw material, improving durability while maintaining measurement capability.
2Ease of operation
If conventional estimation methods based on processing period or supply frequency are used, then the system is simple to operate, but the estimation accuracy of remaining amount is insufficient
Solution Approach 1:
The patent implements a feedback mechanism where the pressure gauge continuously monitors pressure changes in the gas path, and the control unit uses this real-time pressure information to estimate the raw material remaining amount. This feedback loop provides accurate, dynamic information about raw material consumption without requiring complex manual tracking or frequent user intervention, thus maintaining ease of operation while significantly improving estimation accuracy compared to conventional methods based solely on processing time or supply frequency.
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
Enables accurate and stable estimation of the remaining raw material amount by monitoring pressure changes, ensuring consistent supply to the processing container and reducing the need for frequent replacements.
Implementation Method 1
a pressure gauge that is provided in at least one of the upstream path and the downstream path, and detects a pressure within the upstream path or within the downstream path
Data Source
AI summary
A raw material feeding device includes: a raw material container that accommodates a solid or liquid raw material; an upstream path connected to the raw material container; a downstream path connected to the raw material container; a bypass path that connects the upstream path and the downstream path to each other without passing through the raw material container; a downstream side valve; a pressure gauge provided in at least one of the upstream path and the downstream path; and a remaining amount estimation unit that acquires a pressure detection value from the pressure gauge, and estimates a remaining amount of the raw material within the raw material container based on the pressure detection value decreased when the downstream side valve is opened at start of flowing of the raw material gas from the raw material container to the downstream path.