Rotating Drum Position Detection for Blood Culture Sensor Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blood culture apparatuses face challenges in accurately aligning sensor stations with rotating bottles due to misalignment issues, affecting the reliability of microorganism growth detection.
Innovation Solution
A system and method for detecting the position of a rotating drum relative to a stationary measurement board using a measurement and alignment module, which includes a drum-shaped rack, a measurement board, timing targets, a target sensor, and a controller to adjust sensor signals based on the detected position, utilizing optical sensors and timing data to calculate drum offset and angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotating drum with bottles is used in a blood culture apparatus, then the ability to process multiple bottles simultaneously is improved, but misalignment between sensor stations and bottles occurs affecting detection reliability
Solution Approach 1:
The patent replaces mechanical alignment systems with an optical measurement system. A laser emitter projects a beam through the drum wall to a position-sensitive detector, which precisely measures the drum's angular position without mechanical contact. This optical substitution eliminates mechanical wear and alignment drift, ensuring reliable sensor-bottle alignment during rotation.
Solution Approach 2:
The patent introduces timing targets with reflective elements as intermediaries between the drum rotation and the sensor stations. These targets provide optical reference points that allow the system to detect drum position and synchronize sensor readings with bottle positions, ensuring accurate detection despite the rotating motion.
2Device complexity
If sensor stations are fixed while bottles rotate, then the structural complexity is reduced, but alignment accuracy between sensors and bottles deteriorates
Solution Approach 1:
The patent implements a feedback system where the position-sensitive detector continuously monitors drum angular position and provides this information to the control system. The control system uses this feedback to dynamically adjust sensor activation timing, ensuring that sensors read bottle data at the precise moment when bottles are in the correct alignment position, maintaining high alignment accuracy with fixed sensors.
Solution Approach 2:
The patent introduces dynamic timing control to compensate for the static sensor arrangement. By varying the timing of sensor activation based on real-time drum position feedback, the system achieves dynamic alignment accuracy despite the physical fixed position of sensors, effectively decoupling mechanical simplicity from alignment 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
Enhances the accuracy of microorganism growth detection by ensuring consistent alignment between sensor stations and bottles, improving the reliability and efficiency of the blood culture process.
Implementation Method 1
The target sensor is disposed at a stationary position adjacent to the drum and is configured to detect one or more features of the timing targets as each timing target moves past the target sensor
Data Source
AI summary
A system (6000) and method (7000, 7050) for detecting a position of a rotating drum (6050) of a blood culture apparatus relative to a stationary measurement board (6060) disposed adjacent to the rotating drum (6050). The system (6000) and method (7000, 7050) can adjust at least one stored signal of a sensor (6062) of the measurement board (6060) based on the detected position of the rotating drum (6050).