Particle Speed Sensor Calibration via Trigger Point Timing
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Solution Overview
Problem
Existing methods for determining the effective measuring distance between detection points in particle speed measurement devices are prone to errors due to differences in detector switching thresholds, contamination, and misalignment of light sources, requiring lengthy calibration processes that disrupt the measurement system.
Innovation Solution
A method using a test body with a large number of spaced trigger points, where the distance between detection points is calculated from time signal sequences generated as the test body is moved past the detection points, allowing for accurate determination of the effective measuring distance without disrupting the measurement system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a test body with a large number of spaced trigger points is used, then the measurement precision of the effective measuring distance is improved, but the device complexity increases
Solution Approach 1:
The test body is segmented into multiple trigger points spaced at known distances along its length. This segmentation allows the system to measure the effective measuring distance by recording the time differences between trigger point activations at two detection points and comparing against the known geometric spacing, thereby improving measurement precision without requiring complex calibration procedures.
2Reliability
If the light barrier distance is calibrated regularly while the measuring device is in use, then the reliability of speed measurements is improved, but the loss of time increases
Solution Approach 1:
The system performs self-calibration by using the test body with known trigger point spacing to automatically determine the effective measuring distance. This self-service calibration eliminates the need for external calibration procedures or system disassembly, allowing the measuring device to maintain reliability without time-consuming calibration interruptions.
3Ease of manufacture
If the geometric light barrier distance is used instead of the effective measuring distance, then the ease of manufacture is improved, but the measurement precision deteriorates
Solution Approach 1:
The system replaces direct mechanical measurement of the light barrier distance with an optical timing method. By using the test body's trigger points and measuring the time differences of their activation at two detection points, the system calculates the effective measuring distance without requiring precise mechanical calibration, thereby maintaining ease of manufacture while improving measurement precision.
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
This method provides a simple and accurate calibration of the measuring device, ensuring precise measurement of the effective measuring distance between detection points, reducing errors and the need for frequent system disassembly.
Implementation Method 1
two light barriers with a known distance are used as detection points, which are aimed at the blasting agent and interrupted by the passing particles. The signals are registered with optical detectors
Data Source
Figure 1a~1d
Figure 2a~2c
Figure 3a~3b
AI summary
The method involves bypassing a sample at measuring points. The sample has a number of release points arranged one behind the other and spaced from each other. Spatial arrangements of the release points are established with respect to each other. A signal is produced when a freely flying particle passes each release point at each measuring point. The distance between the measuring points is determined using temporal signal sequences produced at the measuring points from the release points.