Gas-Pressurized Ionization Chamber Detector Arrays for Plate Strip Crown Measurement
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Solution Overview
Problem
Existing ray-based crown gauges for detecting the thickness and crown of plates and strips face issues such as long afterglow, temperature sensitivity, mechanical complexity, reduced measurement accuracy at high operating speeds, and poor dynamic performance due to the use of single rows of solid detectors and large ionization chamber detectors.
Innovation Solution
A device utilizing two ray sources and two rows of gas-pressurized ionization chamber detector arrays, with collimators and a simplified mechanical structure, allowing simultaneous data acquisition and improved dynamic measurement accuracy, and reducing the number of ray sources and mechanical complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single row of solid detectors is used, then the response speed is high and the size is small, but the afterglow is long and the service life is short
Solution Approach 1:
The patent changes the material parameter of the detector from solid state to gas-filled state. This fundamental parameter change eliminates afterglow effects inherent in solid detectors and extends service life by using gas fill that can be replaced or regenerated, while maintaining high response speed through optimized gas composition and pressure
2Productivity
If a rotating shutter is used to alternate two ray sources, then the mechanical structure is complicated, but the measurement can be performed
Solution Approach 1:
The patent merges the detection functions for multiple ray sources into a single stationary detector array. By positioning detectors to receive radiation from multiple sources simultaneously and using electronic switching to identify which source is active, the system eliminates the rotating shutter mechanism while maintaining the ability to perform measurements from multiple angles
Solution Approach 2:
The patent replaces the mechanical rotating shutter system with an electronic control system. Ray sources are activated sequentially through electronic switching rather than mechanical rotation, and the stationary detector array records data from each source based on electronic timing signals, eliminating mechanical complexity and vibration
3Device complexity
If a single row of detectors measures two ray sources successively, then the structure is simple, but the measurement accuracy is reduced at high operating speeds
Solution Approach 1:
The patent transitions from a one-dimensional single row of detectors to a two-dimensional array configuration. This dimensional expansion allows detectors to be positioned at multiple locations that can simultaneously capture radiation from different ray sources, enabling parallel measurement of multiple parameters and improving accuracy at high speeds while maintaining structural simplicity
4Reliability
If a large ionization chamber is used, then the detection capability is sufficient, but the resolution is poor and the mechanical system is complicated
Solution Approach 1:
The patent segments the detection system into multiple smaller detector elements arranged in an array configuration. Each detector element covers a specific spatial region, and by combining signals from multiple segmented detectors, the system achieves both sufficient overall detection capability and high spatial resolution, while avoiding the need for large single detectors and complex mechanical systems
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 solution provides high-resolution, irradiation-resistant, and cost-effective measurements with improved dynamic performance and simplified mechanical systems, capable of accurately detecting the thickness and crown of plates and strips without the need for complex mechanical structures or high-speed shutters.
Implementation Method 1
two rows of gas-pressurized ionization chamber detector arrays mounted in a lower arm of the C-frame
Data Source
AI summary
The invention relates to a device for detecting the thickness and crown of plates and strips, belonging to the field of nuclear technology applications. The device comprises a C-frame; two ray source mounted in an upper arm of the C-frame and distributed at an interval along the width direction of a steel plate/strip; two rows of gas-pressurized ionization chamber detector arrays mounted in a lower arm of the C-frame and distributed at an interval along the moving direction of the plate/strip; collimators mounted below the two ray source, the collimators enabling the rays of each ray source to only irradiate to a corresponding row of detectors; pre-amplifier modules connected with the detector arrays; a data collector connected with the pre-amplifier modules; a data processing and displaying computer connected with the data collector; and a cooling water and pressurized air service system and a control system for ensuring system operation and monitoring. The device of the invention is simple in structure and high in dynamic measurement accuracy, and the detectors have the advantages of small temperature drift, irradiation resistance, high spatial resolution, high cost performance and the like.