Pneumatic Transport Vibration Sensor Tank Level Control
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Solution Overview
Problem
Conventional pneumatic transport systems for granular plastic materials face challenges in optimizing filling times due to variability in operating conditions, leading to inefficiencies, material waste, and the need for manual parameter adjustments, with existing sensors being unreliable and prone to vibration-induced errors.
Innovation Solution
A pneumatic transport system equipped with vibration sensors that generate time signals correlated to the mass or volume of granular material, allowing an electronic control unit to estimate the filled level of the collection tank and adjust the filling time automatically, incorporating a cleaning step to optimize the filling cycle and reduce manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual parameter adjustment is used to optimize filling times, then the system can be adapted to operating conditions, but the complexity of operation increases and time is lost for adjustments
Solution Approach 1:
The system automatically monitors tank filling levels and adjusts parameters without manual intervention. The control unit receives signals from sensors and autonomously optimizes filling times, making the system self-adjusting to operating conditions.
Solution Approach 2:
Sensors continuously monitor the filling level of the collection tank and provide feedback signals to the control unit. This closed-loop feedback enables automatic parameter adjustment based on real-time operating conditions.
2Measurement precision
If existing sensors are used to monitor tank level, then measurement can be performed, but reliability decreases due to vibration-induced errors
Solution Approach 1:
The system uses vibration sensors (accelerometers) that detect mechanical vibrations caused by granular material impacting the tank. These vibrations serve as reliable indicators of filling level and material flow, converting a potentially harmful vibration environment into a useful measurement mechanism.
Solution Approach 2:
Traditional level sensors are replaced with vibration-based detection. Instead of measuring position directly, the system measures the mechanical vibrations generated by material flow and impact, which are then correlated to filling level through signal processing.
3Reliability
If cleaning step is added to the filling cycle, then material accumulation and clogs are prevented, but the filling time increases
Solution Approach 1:
The cleaning operation is performed periodically at predetermined intervals rather than continuously. This periodic cleaning prevents material accumulation and clogs while minimizing the time lost to cleaning operations, optimizing the balance between reliability and productivity.
Solution Approach 2:
The cleaning step is performed in advance or at predetermined intervals before clogs can form. By proactively removing accumulated material, the system prevents disruptions and maintains continuous operation, reducing overall downtime.
4Productivity
If automated control is implemented, then productivity increases through continuous operation, but device complexity increases
Solution Approach 1:
The control unit performs multiple functions: it receives sensor signals, processes vibration data, determines filling levels, adjusts filling parameters, and triggers cleaning operations. This multi-functional approach consolidates control logic into a single unit, reducing overall system complexity while maintaining high automation capability.
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 system enables efficient, automated adjustment of filling times, reduces operational costs, and enhances reliability by monitoring the tank level in real-time, minimizing downtime and material waste, while being simple and inexpensive to implement.
Implementation Method 1
a vacuum pneumatic transport system comprises at least one loading device of the granular material directly associated with a processing machine, a duct which connects a storage container of the granular plastic material to the above-mentioned loading device and at least one vacuum source. The handling of the granular material from the storage container to the loading device is carried out thanks to the vacuum generated in the duct of the above-mentioned vacuum source
Implementation Method 2
at least one sensor to detect the vibrations induced by the granular material which is being loaded into the loading device
Implementation Method 3
estimating progressively over time the filled level of the collection tank of the loading device, correlating to the above-mentioned time signals the mass of granular material loaded in the tank by means of a modal analysis of the same signals
Implementation Method 4
means for generating inside the conveying duct a flow of granular material from the container to the tank of the loading device
Data Source
AI summary
A control method and pneumatic transport system of granular material, conveys granular material from storage containers to processing machines includes at least one loading device of the granular material with a collection tank of the granular material; at least one granular material conveying duct fluidly connecting the collection tank to at least one container; and a granular material flow generator inside the conveying duct. For each loading device at least one sensor detects vibrations induced by the material being loaded inside the loading device. The sensor is arranged at or near the loading device and generates time signals of the vibrations that may be correlated to the granular material mass being progressively loaded in the tank or to the volume of the tank being progressively filled by the granular material.