Transverse Load Testing Machine with Feedback Control
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Solution Overview
Problem
Current testing machines for bolt looseness under transverse load are inaccurate as they fail to maintain a fixed transverse load force, leading to inconsistent results when bolts are subjected to a constant transverse force, whereas the testing machines apply a constant transverse displacement load, which is contrary to actual working conditions.
Innovation Solution
A testing machine with a load transfer and control part that uses a motor to control transverse displacement and force, employing sensors for feedback to maintain a stable transverse load, comprising a frame structural member, displacement sensors, elastic rods, and a load generating motor to adjust displacement and force accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a constant transverse displacement load is applied to the bolts, then the testing machine can maintain a fixed displacement amplitude, but the transverse load force becomes variable and does not accurately simulate actual working conditions
Solution Approach 1:
The patent employs a feedback control system where displacement sensors measure the actual transverse displacement of the bolt, and this information is fed back to the control system. The control system adjusts the driving motor in real-time to maintain a constant transverse load force despite changes in bolt looseness, thereby resolving the contradiction between maintaining fixed displacement and accurately simulating working conditions.
Solution Approach 2:
The patent transitions from a static displacement control approach to a dynamic load control approach. The system continuously adjusts the transverse load force based on real-time measurements of bolt displacement and looseness, making the testing machine adaptable to varying working conditions while maintaining measurement precision.
2Device complexity
If the transverse displacement amplitude is fixed, then the testing machine structure is simple, but the transverse load force varies with bolt looseness
Solution Approach 1:
The patent uses displacement sensors to measure the actual transverse displacement of the bolt and feeds this information back to the control system. The control system then adjusts the driving motor to maintain a constant transverse load force, achieving accurate load control without excessive structural complexity.
Solution Approach 2:
The patent replaces pure mechanical displacement control with a control system that uses sensors and electronic feedback to regulate the transverse load force. This substitution allows for more precise load control while keeping the mechanical structure relatively simple.
3Ease of operation
If a servo hydraulic cylinder is used to produce alternating transverse displacement, then the testing machine can control displacement, but the system becomes complex and cannot maintain fixed transverse load force
Solution Approach 1:
The patent replaces the complex servo hydraulic cylinder system with a simpler motor-driven system combined with electronic feedback control. The motor is controlled by a microprocessor that receives input from displacement sensors, achieving displacement control with reduced mechanical complexity and the ability to maintain fixed transverse load force.
Solution Approach 2:
The patent implements a feedback control system where displacement sensors measure the actual transverse displacement and feed this information to the control microprocessor. The microprocessor adjusts the motor operation in real-time to maintain constant transverse load force, eliminating the need for complex hydraulic systems while preserving control 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
Enables accurate control of transverse load, providing a stable transverse displacement and force load, adapting to different bolt loading conditions, and simulating single-bolt looseness effectively.
Implementation Method 1
an elastic rod 9
Implementation Method 2
an S-shaped column type displacement sensor 8
Implementation Method 3
a current vortex displacement sensor 3
Implementation Method 4
a load generating motor 11
Data Source
AI summary
The present invention provides a testing machine for accurately controlling looseness of a transverse load, and belongs to the technical field of mechanical testing devices. The testing machine for accurately controlling looseness of the transverse load uses a motor to control the generated transverse displacement, controls the generated transverse load by controlling the motor, and controls the motor through signal feedback from the sensor to keep the generated transverse load basically stable within a small range of a fixed value. Unlike the existing testing machine for looseness of the transverse load that can only provide one fixed transverse displacement load, the present invention can provide a desired stable transverse displacement load and can provide a desired stable transverse force load to adapt to simulation experiments for different bolt loading conditions.