Vacuum Pick Mechanism Pressure Sensor Feedback Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vacuum pick mechanisms for sheet media, such as currency notes, face challenges in maintaining a consistent vacuum pressure due to variations in media characteristics and atmospheric conditions, leading to pick failures, especially when dealing with media having holes or incomplete seals.
Innovation Solution
A vacuum pick mechanism equipped with control circuitry, a pump, a suction cup, and a pressure sensor that adjusts the target pressure based on media characteristics and atmospheric conditions, using a stepper motor to control the pump and maintain a predetermined pressure difference, allowing for adaptive pressure adjustment during the picking process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pump is controlled to perform a predetermined number of strokes to produce pressure, then the picking process is simple to operate, but pick failure occurs when there is a hole in the sheet media or pressure is lost during transport
Solution Approach 1:
A pressure sensor is integrated into the pick line to provide real-time feedback on the vacuum pressure level. The control circuitry receives this pressure signal and uses it to dynamically adjust pump operation, ensuring the vacuum pressure remains within the optimal range for reliable media pickup and transport, thereby preventing pick failures due to pressure loss or holes in the media.
Solution Approach 2:
The system transitions from static, predetermined pump stroke control to dynamic pressure-based control. The pump operation is continuously adjusted based on real-time pressure feedback, allowing the system to adapt to varying conditions such as different media types, atmospheric pressure changes, and potential pressure losses during transport.
2Device complexity
If a vacuum is created according to predetermined criteria, then the pump operation is straightforward, but the pressure may be insufficient for secure holding or cause multiple notes to be picked up
Solution Approach 1:
The pressure sensor provides continuous feedback on the actual vacuum pressure achieved. The control circuitry compares this measured pressure against target pressure values and adjusts pump operation accordingly, enabling precise control of vacuum pressure to securely hold single notes without picking up multiple notes, while maintaining straightforward pump operation.
3Stress or pressure
If the volume of the sealed system is increased to create pressure reduction, then the vacuum level increases, but the picking time increases and a more powerful pump is required
Solution Approach 1:
The system replaces a mechanically large-volume approach with a sensor-controlled pressure regulation approach. Instead of increasing system volume to achieve better vacuum, the patent uses a pressure sensor and control circuitry to optimize the vacuum level in the existing volume, reducing picking time and allowing the use of less powerful pumps while maintaining effective vacuum pressure for reliable media pickup.
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 solution enhances the reliability and efficiency of picking sheet media by maintaining a consistent vacuum pressure, reducing pick failures, and allowing for automatic adjustments to changes in atmospheric pressure, enabling faster and more secure handling of media.
Implementation Method 1
a pump is used to suck air through the pick line creating a partial vacuum
Implementation Method 2
A key factor in how securely the note is held is the difference between the pressure within the cup and the local atmospheric pressure
Data Source
AI summary
A vacuum pick mechanism (100) for picking sheet media comprising control circuitry (126), a pump (110), a suction cup (106), a pick line (112) connecting the pump (110) to the suction cup (106), a pressure sensor (122) arranged to measure the pressure within the pick line (112) and a motor arranged to drive the pump, the control circuitry being arranged to receive the pressure measured by the pressure sensor and to control the motor to drive the pump such that a predetermined target pressure is measured by the pressure sensor.