Tubular Bag Machine Sensor Detection Precision
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Solution Overview
Problem
Existing tubular bagging machines face challenges in accurately detecting products due to varying electromagnetic field geometries influenced by pipe diameter, emitted wavelength, and sensor coupling, leading to detection of objects outside the filling tube.
Innovation Solution
A tubular bagging machine design featuring a vertical filling tube with transverse sealing, a control unit, and a sensor device that limits electromagnetic wave detection to a specific area within the filling tube using absorber elements and a metallic reflector, ensuring precise detection independent of sensor sensitivity and frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic waves are emitted by a sensor to detect products in a filling tube, then product detection is enabled, but the electromagnetic waves detect objects outside the filling tube as well as inside, reducing detection precision
Solution Approach 1:
The patent extracts and removes electromagnetic waves outside the desired detection area by placing absorber elements along the filling tube. These absorber elements selectively absorb electromagnetic waves that would otherwise travel beyond the filling tube, effectively removing the harmful detection of external objects while preserving the detection of products inside the tube.
Solution Approach 2:
The patent creates a localized detection area with specific electromagnetic properties by positioning absorber elements at specific locations along the filling tube. This creates a controlled electromagnetic environment where the detection characteristics are optimized locally within the filling tube while external areas are excluded from detection.
2Measurement precision
If sensors with high sensitivity and specific quality requirements are used to achieve precise detection, then detection accuracy improves, but sensor cost increases
Solution Approach 1:
The patent introduces absorber elements as intermediary components between the sensor and the surrounding environment. These absorber elements create a controlled electromagnetic environment that allows the use of simpler, less expensive sensors while maintaining high detection accuracy, as the absorbers compensate for the sensor's lower inherent precision by eliminating external interference.
3Area of stationary object
If the detection area is extended to cover larger sections of the filling tube, then more product elements are detected, but the detection area includes objects outside the filling tube
Solution Approach 1:
The patent removes electromagnetic waves from extending beyond the filling tube by placing absorber elements at strategic positions. This extraction of electromagnetic energy prevents the detection area from expanding into external regions, maintaining precise detection only within the filling tube boundaries.
Solution Approach 2:
The absorber elements are positioned periodically or at specific intervals along the filling tube to create a controlled pattern of electromagnetic absorption. This periodic placement ensures that the electromagnetic waves are contained within the filling tube while allowing comprehensive detection of all product elements passing through.
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 design achieves precise product detection with improved accuracy and allows the use of inexpensive sensors, maintaining a compact and uniform diameter, and enabling detection across different pipe diameters and product types.
Implementation Method 1
the sensor device comprises a sensor for emitting and detecting electromagnetic waves
Implementation Method 2
the detection space is preferably delimited by at least a first absorber element and a second absorber element
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a tubular bag machine for filling a product into bags (9), comprising a vertical filling tube (2), a transverse sealing unit (3), a control unit (4) for controlling the tubular bag machine, and a sensor device (5) for detecting the product in the filling tube (2), which is designed to detect the product falling through the filling tube (2), wherein the sensor device (5) has a sensor (51) for emitting electromagnetic waves, and which is connected to the control unit (4), wherein the electromagnetic waves emitted by the sensor (51) remain in a detection space (E) which is confined to one region at the filling tube (2).