Abrasive Flow Measurement in Jet Cutting Conduits
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Solution Overview
Problem
Existing methods for estimating and controlling abrasive material flow in liquid jet cutting systems are inaccurate and require manual sampling, leading to inefficiencies and excess consumption.
Innovation Solution
A system and method for measuring abrasive flow rates using sensor assemblies to detect the time it takes for a column of abrasive to pass through spaced sensors, allowing for real-time calculation of volumetric and mass flow rates, and enabling closed-loop control of the cutting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual sampling method is used to estimate abrasive flow rate, then measurement can be performed with simple equipment, but measurement precision is poor and requires system shutdown
Solution Approach 1:
The patent replaces manual mechanical sampling and weighing with an optical detection system. Sensors (optical, capacitive, ultrasonic, or electromagnetic) detect abrasive material passage through the conduit, and a processor automatically calculates flow rate based on timing signals, eliminating the need for physical sampling and manual measurement.
Solution Approach 2:
The patent introduces sensor assemblies as intermediaries between the abrasive flow and the measurement system. These sensors detect the passage of abrasive material without direct contact, converting physical flow into electrical signals that can be processed to determine flow rate, thus enabling non-intrusive measurement.
2Productivity
If simulated cutting mode sampling is used, then equipment complexity is minimized, but productivity is reduced due to system shutdown requirements
Solution Approach 1:
The measurement system operates continuously during normal cutting operations without requiring system shutdown. Sensors detect abrasive flow in real-time while the cutting process continues, eliminating interruptions and maintaining continuous productive action.
Solution Approach 2:
The system performs self-measurement during operation. The sensors automatically detect abrasive passage and the processor calculates flow rate without external intervention or manual sampling, allowing the system to monitor its own operation continuously without stopping for calibration.
3Loss of substance
If manual sampling and weighing is performed, then measurement system complexity is low, but loss of substance occurs due to abrasive collection requirements
Solution Approach 1:
Sensor assemblies serve as intermediaries that detect abrasive material passage without requiring physical collection. The sensors (optical, capacitive, ultrasonic, or electromagnetic) sense the presence and timing of abrasive particles flowing through the conduit, enabling measurement without removing or collecting the material.
Solution Approach 2:
The patent replaces the mechanical collection and weighing process with electronic detection and computation. Instead of physically gathering abrasive samples and measuring their mass, the system uses sensors to detect passage timing and a processor to calculate flow rate, eliminating material loss entirely.
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 precise control over cutting conditions, reduces excess abrasive consumption, ensures repeatability, and minimizes operational costs by eliminating the need for manual sampling.
Implementation Method 1
the sensor assembly includes a sensor configured to generate an output signal in response to detecting the abrasive passing through the conduit
Implementation Method 2
the sensor assembly includes a sensor configured to generate an output signal in response to detecting the abrasive passing through the conduit
Data Source
AI summary
The present disclosure relates to abrasive material delivery systems for liquid jet cutting systems. The abrasive material delivery systems can include a valve configured to adjust an inflow of abrasive material into the abrasive material delivery system from a source of abrasive material. The systems can include a chamber downstream of the valve and configured to receive the inflow of abrasive material from the valve. The systems can include a metering component configured to control an outflow of abrasive from the chamber to a cutting head of the liquid jet cutting system. In some embodiments, the systems include a sensor configured to monitor movement of a top surface of a portion of abrasive material within the chamber as the top surface moves through the chamber; and a processing device operably connected to the sensor and configured to determine an abrasive flow rate through the metering component based on a speed of the top surface as monitored by the sensor.