Double-Valve Pressure Wave Device for Projectile Motion Control
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Solution Overview
Problem
Existing pneumatic devices for generating mechanical pressure waves in medical applications face limitations in controlling the forward and backward movement of projectiles, leading to inefficient impact velocities and frequencies, and require constant pressure adjustments to achieve desired outcomes.
Innovation Solution
A double valve system is employed to control the projectile's movement, allowing for independent activation times in both directions, enabling partial movement reversal and overlap or gap periods, thus decoupling impact velocity from pressure changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single switching valve is used for pneumatic acceleration, then the device structure is simple, but the control over projectile movement is limited and impact velocity cannot be independently adjusted
Solution Approach 1:
The single switching valve is segmented into two independent valves: a first switching valve for controlling the acceleration phase (first activation time) and a second switching valve for controlling the return phase (second activation time). This segmentation allows independent control of each phase, enabling separate adjustment of acceleration duration and return duration, thereby achieving independent control over projectile movement characteristics without excessive structural complexity.
Solution Approach 2:
The system transitions from static pressure control to dynamic temporal control. By introducing independently controllable activation times for each valve, the system dynamically adjusts the duration of pneumatic pressure application during acceleration and return phases. This dynamic control enables variable impact velocities through temporal parameter adjustment rather than requiring constant pressure changes.
2Speed
If pneumatic pressure is increased to achieve higher impact velocity, then the impact velocity increases, but the energy consumption and pressure requirements increase
Solution Approach 1:
The system employs periodic pneumatic action through controlled activation and deactivation of the first and second switching valves. The first valve provides periodic acceleration pulses during the first activation time, while the second valve provides periodic return pulses during the second activation time. This periodic action allows the projectile to be accelerated to the required velocity over a controlled time period rather than requiring continuously high pressure, thereby reducing overall pneumatic energy consumption.
Solution Approach 2:
The first switching valve applies pneumatic pressure in advance during the first activation time to accelerate the projectile before impact. By performing this preliminary acceleration action over a controlled duration, the system achieves the required impact velocity without needing excessive pressure at the moment of impact, thereby optimizing energy utilization.
3Speed
If the projectile travels the full distance to maximize acceleration, then the impact velocity is maximized, but the time for complete return movement increases the cycle time
Solution Approach 1:
The second switching valve provides periodic pneumatic assistance during the return phase, creating a second activation time that is independent of the first activation time. This periodic return action allows the projectile to be pushed back more efficiently, reducing the time required for complete return movement without compromising the acceleration distance and impact velocity achieved during the first activation phase.
4Speed
If the activation time is extended to increase impact velocity, then the velocity increases, but the frequency of impacts decreases
Solution Approach 1:
The activation process is segmented into two independent temporal phases: the first activation time for acceleration and the second activation time for return. By segmenting the control, the system can optimize each phase independently - the first activation time can be extended to achieve higher impact velocity while the second activation time can be optimized for rapid return. This segmentation allows the cumulative cycle time to be managed efficiently, maintaining higher impact frequency despite extended acceleration phases.
Solution Approach 2:
The system dynamically adjusts the duration of the first and second activation times independently. The first activation time can be extended to maximize impact velocity when needed, while the second activation time can be shortened to facilitate rapid return. This dynamic temporal control allows the system to adapt between velocity optimization and frequency optimization based on operational requirements, achieving a better balance between the two parameters.
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 allows for variable impact velocities and frequencies without altering pneumatic pressure, enhancing operational flexibility and efficiency by reducing travel distance and momentum exchange time, facilitating rapid control of impact physics.
Implementation Method 1
A proven and widely described technique for accelerating the projectile is pneumatic. This technique involves applying pneumatic overpressure to a volume on one side of the projectile as it moves along a path
Implementation Method 2
the return movement is carried out with the help of a counter-pressure chamber, i.e. a storage volume into which the projectile moving towards the applicator displaces the air in front of it
Data Source
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AI summary
The invention relates to a device for treating the human or animal body with mechanical pressure waves, the device comprising: a projectile guided in the device along the path of movement, an applicator at one end and a stop at the other end of the path of movement, a pneumatic device for applying pneumatic pressure to the projectile for movement along the path of movement, wherein the projectile is designed to strike the applicator to generate the mechanical pressure waves, the pneumatic device comprising a double valve arrangement for applying pneumatic pressure to the projectile in the direction towards the applicator during a first activation period and for applying pneumatic pressure to the projectile in the reverse direction during a second activation period, and a control device for controlling the double valve arrangement, wherein the device is designed toafter a partial return movement in a second activation period, to end this second activation period, to begin a first activation period, and by applying pneumatic pressure to the projectile after only part of the movement distance and before the end with the stop, to reverse the movement of the projectile from a return movement to a forward movement.