Biological Component Collection System Pressure Measurement
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Solution Overview
Problem
Existing biological component collection systems face challenges in accurately measuring circuit internal pressure, which is crucial for ensuring proper operation and efficiency during the collection and return of biological components.
Innovation Solution
A biological component collection system equipped with a separation device and a collection device featuring load detecting units, data acquisition, estimated data calculation, and internal pressure calculation units, which allow for accurate measurement of internal pressure by correcting estimated data to match pressures calculated from different load measurement units during collection and return operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single load detecting unit is used to measure circuit internal pressure, then the device complexity is reduced, but the measurement precision deteriorates due to time-dependent reaction forces
Solution Approach 1:
The pressure measurement function is segmented into two independent load detecting units (first and second load detecting units) positioned at different locations on the collection device. Each unit independently measures load, and their combined data enables accurate pressure calculation by compensating for time-dependent reaction forces that would affect a single measurement point.
Solution Approach 2:
The patent introduces an intermediary correction mechanism using the second load detecting unit to measure reaction forces that act on the first load detecting unit. By measuring both the direct load and the reaction force separately, the system can calculate and remove the reaction force component from the pressure measurement, thereby eliminating the measurement error caused by time-dependent effects.
2Measurement precision
If multiple load detecting units are used to improve measurement accuracy, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The patent merges the functions of multiple load detecting units into a unified pressure measurement system. The first load detecting unit measures the total load, while the second load detecting unit measures the reaction force. These measurements are combined through data processing that calculates internal pressure by subtracting the reaction force component from the total load, achieving high measurement precision without requiring three or more separate measurement systems.
Solution Approach 2:
The patent changes the measurement parameters by measuring both load and reaction force separately, then transforming these measurements into an accurate pressure value through calculation. This parameter transformation approach allows the system to use simple load cells rather than complex pressure sensors, reducing overall device complexity while maintaining high measurement precision.
3Ease of operation
If reaction forces are not corrected in the measurement data, then the ease of operation is maintained, but the measurement precision deteriorates
Solution Approach 1:
The system performs self-correction by automatically measuring and compensating for reaction forces. The second load detecting unit independently measures the reaction force, and the control unit automatically calculates and applies the correction to the pressure measurement. This self-service approach eliminates the need for manual calibration or intervention, maintaining ease of operation while achieving high measurement precision.
Solution Approach 2:
The patent implements a feedback mechanism where the measurement from the second load detecting unit (reaction force) is fed back into the calculation process to correct the pressure measurement from the first load detecting unit. This feedback loop automatically adjusts for time-dependent reaction forces, ensuring continuous high measurement precision without requiring operator intervention.
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 measurement of circuit internal pressure, ensuring accurate operation and efficiency in biological component collection systems by accounting for time-dependent reaction forces and correcting data to align with stable pressure readings.
Implementation Method 1
a first applied load measurement unit which partially makes up the line forming member in a device installed state in which the biological component collection device is attached to the separation device, a second applied load measurement unit which partially makes up the line forming member in the device installed state
Data Source
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AI summary
A biological component collection system and a circuit internal pressure acquisition method are provided, which are capable of accurately measuring the circuit internal pressure. A centrifugal separation device (14) of a blood component collection system (10) comprises an estimated data calculation unit (108) that calculates estimated data B on the basis of initial data A, and a correction unit (116) that corrects the estimated data B in a manner so that the internal pressure calculated by a first internal pressure calculation unit (112) becomes equivalent to the internal pressure calculated by a second internal pressure calculation unit (114), at a time between a collection operation and a returning operation, in a state in which an inner hole of a first applied load measurement unit (60) and an inner hole of a second applied load measurement unit (62) communicate with each other and a collection and returning pump (100) is stopped.