Pump Motor Failsafe Control for Overspeed and Precise Placement
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Solution Overview
Problem
Modern medical pumps face challenges in speed regulation, precise placement, and priming, leading to potential malfunctions and safety issues during operations, particularly in medical procedures where precise control is crucial.
Innovation Solution
A pump failsafe apparatus comprising a pump cartridge, foot pedal, internal logic controlled power switch, overspeed detector, under voltage detector, and hall position sensor, which enables controlled speed adjustment, prevents overspeed and under voltage malfunctions, and facilitates safe priming and placement by generating signals for power management and sensor feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pump operates at high speed to rapidly remove material, then productivity is improved, but precision of placement deteriorates
Solution Approach 1:
The pump system dynamically adjusts its operating speed based on the operational phase. During placement/priming, the pump operates at low speed for precision, and during active material removal, it operates at high speed for productivity. This dynamic speed adjustment resolves the contradiction between placement precision and material removal efficiency.
2Measurement precision
If the pump is powered down for precise placement, then precision of placement is improved, but productivity deteriorates due to repeated priming
Solution Approach 1:
The pump maintains a low-level operational state (primed but not actively pumping) during placement procedures, so that when material removal is needed, the pump is already primed and can immediately operate at high speed. This preliminary preparation eliminates the need for repeated priming cycles, resolving the contradiction between placement precision and productivity.
3Productivity
If the pump operates at high speed for rapid material removal, then productivity is improved, but reliability deteriorates due to overspeed malfunctions
Solution Approach 1:
The pump system incorporates speed detection and control mechanisms that provide feedback to the control system. When the pump approaches dangerous speed thresholds, the system automatically reduces speed to prevent overspeed malfunctions. This feedback control allows the pump to operate at high speeds for productivity while maintaining reliability through automatic speed regulation.
4Measurement precision
If the pump is primed and powered on simultaneously for precise placement, then precision of placement is improved, but harmful factors increase due to violent jerking
Solution Approach 1:
The pump system uses controlled periodic activation where the pump is primed first at low speed, then activated in a controlled sequence rather than simultaneously. This staged, periodic action sequence eliminates violent jerking while achieving precise placement, resolving the contradiction between placement precision and reduction of harmful mechanical shocks.
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 apparatus ensures safe and precise operation by reducing pump speed for precise placement, preventing malfunctions due to temperature or voltage deviations, and eliminating the need for repeated priming, thereby reducing the risk of violent jerking and improving operational safety.
Implementation Method 1
an overspeed detector in electrical communication with at least the pump motor and a hall position sensor
Implementation Method 2
the return pipe of these pumps safely and expediently siphons the unwanted material into a waste collection system
Data Source
AI summary
Provided for may be a pump failsafe apparatus for use with a pump motor, the pump failsafe apparatus comprising a foot pedal configured to generate a first signal when depressed and a second signal when released. The apparatus may comprise a power supply having an internal logic controlled power switch, the power supply in electrical communication with at least the pump motor, wherein the internal logic controlled power switch includes an active state (ON) and an inactive state (OFF). The apparatus may further include an overspeed detector, an under voltage detector in electrical communication with at least the power supply, the under voltage detector configured to measure a logic voltage, and a pump cartridge detector.