Variable Speed Drive for Pneumatic Carrier Velocity Control
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Solution Overview
Problem
Pneumatic tube systems impart significant physical forces on payloads during transport, such as acceleration, deceleration, and centripetal forces, which can alter the integrity and characteristics of samples and drugs, making it challenging to maintain their properties effectively.
Innovation Solution
A system that controls the velocity of pneumatic carriers by variably adjusting the power output of the power source connected to the pneumatic device, allowing for reduced forces applied to the carrier and its contents by identifying and optimizing the travel path, using path characteristic information to minimize energy transfer through the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high velocity airflow is used to maintain system throughput, then productivity is improved, but the physical forces applied to the carrier and its contents increase, worsening the integrity of sensitive materials
Solution Approach 1:
The system dynamically adjusts the velocity of airflow in different zones based on real-time conditions. The blower operates at variable speeds to provide high velocity in some segments for productivity while reducing velocity in other segments to minimize physical forces on sensitive payloads, resolving the contradiction between throughput and payload integrity
Solution Approach 2:
The pneumatic transport system is divided into multiple segments with independent velocity control. Each segment can operate at different airflow velocities, allowing the system to optimize productivity in non-sensitive areas while protecting sensitive materials in other areas, thus balancing throughput requirements with payload protection
2Stability of the object's composition
If variable speed control is implemented to reduce physical forces, then the integrity of samples and drugs is improved, but the system complexity increases due to additional control mechanisms
Solution Approach 1:
The controller serves multiple functions: it monitors carrier position, determines travel paths, calculates required velocities, and controls blower operation. This multi-functionality reduces the need for separate dedicated components for each control task, thereby limiting the increase in system complexity while achieving variable speed control to protect sensitive materials
Solution Approach 2:
The system uses feedback from carrier position detection and travel path information to automatically adjust blower velocity. This closed-loop control enables the system to maintain appropriate airflow speeds for protecting samples and drugs without requiring manual intervention or overly complex control mechanisms
3Object-affected harmful factors
If the blower power is reduced to minimize energy transfer to the carrier, then the harmful physical forces are decreased, but the system throughput and productivity deteriorate
Solution Approach 1:
The blower operates dynamically with variable power output rather than at constant high power. The controller adjusts blower speed based on carrier position and travel path characteristics, providing high power when needed for throughput while reducing power to minimize energy transfer to the carrier, thus balancing productivity with reduced harmful effects
Solution Approach 2:
The system changes the operational parameters of the blower (speed, power output) based on real-time conditions and pre-stored path characteristics. By optimizing these parameters for each specific transport scenario, the system achieves adequate throughput while minimizing excessive energy transfer that would harm the carrier contents
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 approach reduces the total forces applied to the carrier and its contents, minimizing the impact on sensitive materials while maintaining system throughput by optimizing airflow velocity and handling profiles for different segments of the transport path.
Implementation Method 1
a pneumatic device that provides airflow to the carrier system
Implementation Method 2
variably controlling the power output of the power source... variably controls the velocity of the pneumatic carrier
Data Source
AI summary
Provided herein are systems and methods for use in controlling a translocation process of a pneumatic tube system in order to reduce the amount of energy transferred from the tube system to a pneumatic carrier and, hence, its contents. Generally, these utilities entail identifying and/or reducing forces applied to a pneumatic carrier traveling through a travel path within a pneumatic tube system. The systems and method disposed herein allow for varying the velocity of a pneumatic carrier as it passes through a travel path of the pneumatic system. Such varying of the velocity allows for reducing the total forces applied to the pneumatic carrier during passage through the system. In one arrangement, the power output of a power source connected to a compressor device is altered to vary the velocity of pneumatic carries in the system.