Self-Supporting Vibration Excitator with Counterweight Stinger
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Solution Overview
Problem
Existing vibration excitators face limitations in transmitting large forces due to size constraints, are often orientation and location-specific, and can deform under gravitational force, leading to inaccurate force alignment and complex installation processes, which affects measurement accuracy.
Innovation Solution
A vibration excitator design where the main body is unsupported and the full weight is carried by the stinger, with a sensor-equipped force-transmitting end and elastic properties to maintain accurate force direction and minimize deformation, allowing for flexible attachment to any location and orientation without external support, and integrating sensors to improve measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the main body is made larger to transmit larger forces, then the force transmission capability is improved, but the space requirement increases
Solution Approach 1:
The patent applies counterweight by positioning the center of gravity of the main body above the pivot axis, creating a gravitational moment that counteracts the deformation caused by the stinger's weight. This allows the stinger to be lighter and more flexible while maintaining accurate force transmission, resolving the contradiction between force capability and space requirements.
Solution Approach 2:
The patent changes the physical parameters of the system by making the main body unsupported and allowing it to pivot freely, transforming it from a rigid supported structure to a flexible pendulum-like system. This parameter change enables compact dimensions while maintaining force transmission capability through dynamic balance.
2Stability of the object's composition
If the main body is supported by additional attachment means, then the deformation is prevented, but the installation complexity increases and the measuring object is influenced
Solution Approach 1:
The patent extracts the support function from external attachment means and transfers it to the gravitational field itself. By positioning the center of gravity above the pivot axis, the system uses gravity as the stabilizing mechanism, eliminating the need for additional support attachments and reducing installation complexity.
Solution Approach 2:
The system becomes self-stabilizing through its gravitational configuration. The main body automatically returns to its equilibrium position after displacement, and the stinger naturally aligns with the force direction without requiring external support or complex installation procedures.
3Adaptability or versatility
If the stinger carries the full weight of the main body, then the vibration excitator can be used in any orientation, but the stinger deformation increases
Solution Approach 1:
The patent uses the gravitational moment created by positioning the center of gravity above the pivot axis to counteract the bending effect of the stinger's weight. This counterbalancing effect maintains stinger alignment accuracy even when the full weight of the main body is carried, enabling use in any orientation without deformation.
4Measurement precision
If sensors are integrated in the stinger, then the measurement accuracy is improved, but the forces may damage the sensor during installation and removal
Solution Approach 1:
The patent introduces an intermediary protective structure where the sensor is housed within a sensor housing that is rigidly connected to the main body. The stinger connects to this housing through a force-transmitting connection that allows controlled movement, shielding the sensor from installation and removal forces while maintaining measurement accuracy.
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
Enables precise and accurate force transmission and measurement across various orientations and locations, reducing installation complexity and maintaining measurement accuracy while minimizing space requirements and potential damage from installation forces.
Implementation Method 1
This dynamic part, which is normally indicated by the English phrase 'stinger', is capable of moving relative to that main body, and has elastic properties in order to prevent the vibration behaviour of the measuring object to be examined from being disturbed
Implementation Method 2
In this context, it is a problem that the main body of the vibration excitator itself is subjected to the gravitational force
Data Source
AI summary
A vibration excitator including a main body, a stinger which is adapted to move relative to the main body, in a particular working direction, an actuator coupled to the main body and the stinger, wherein the stinger has a first end that is coupled to the main body, and an opposite second end that is intended for attachment to an object to be examined, wherein the stinger has an elastic center point, wherein the main body has a center of gravity, and wherein L1=L3 applies, wherein L1 is the distance between the elastic center point and the second stinger end, measured along the said working direction, and wherein L3 is the distance between the center of gravity and the second stinger end, measured along the said working direction.