Ultrasonic Horn Alignment Detection via Accelerometer Signal Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ultrasonic welding systems face challenges in aligning the ultrasonic horn with the anvil, resulting in undesirable structural characteristics of weld joints.
Innovation Solution
A system utilizing first and second accelerometer sensors on a bracket coupled to the anvil generates signals indicative of accelerations when the ultrasonic horn vibrates, with a microprocessor determining the difference in signal amplitudes to determine alignment, storing an identifier value if the difference is within a threshold, and providing feedback through a display and speaker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional ultrasonic welding systems are used without alignment detection, then the system structure remains simple, but the alignment between ultrasonic horn and anvil becomes difficult to control, resulting in undesirable weld joint structural characteristics
Solution Approach 1:
The patent replaces manual or mechanical alignment methods with an electronic sensing system. Accelerometer sensors detect vibrations transmitted through the bracket during ultrasonic operation, and a microprocessor analyzes these signals to determine alignment status, substituting mechanical alignment procedures with an electronic detection and analysis system.
Solution Approach 2:
The system provides real-time feedback about alignment status by processing vibration signals from the accelerometer sensors. The microprocessor analyzes the amplitude differences in signals from different sensor positions and provides information about whether the horn is properly aligned with the anvil, enabling operators to adjust alignment based on quantitative feedback.
2Reliability
If alignment detection systems are implemented, then weld joint structural characteristics improve, but the device complexity and cost increase
Solution Approach 1:
The system uses the existing ultrasonic vibration and the bracket structure already present in the welding system to perform alignment detection. The bracket serves dual purposes: structural support and vibration transmission path for the accelerometer sensors. This self-service approach leverages existing system components rather than requiring entirely separate alignment equipment.
Solution Approach 2:
The accelerometer sensors act as intermediaries between the ultrasonic horn-anvil interface and the control system. They convert mechanical vibrations into electrical signals that can be processed by the microprocessor, providing an indirect but effective means of monitoring alignment without requiring direct measurement at the horn-anvil contact point.
3Manufacturing precision
If manual alignment methods are used, then the system remains simple to operate, but alignment precision deteriorates, resulting in inconsistent weld joints
Solution Approach 1:
The system provides real-time feedback about alignment status by processing vibration signals from the accelerometer sensors. The microprocessor analyzes the amplitude differences in signals from different sensor positions and provides information about whether the horn is properly aligned with the anvil, enabling operators to adjust alignment based on quantitative feedback.
Solution Approach 2:
The patent replaces manual or mechanical alignment methods with an electronic sensing system. Accelerometer sensors detect vibrations transmitted through the bracket during ultrasonic operation, and a microprocessor analyzes these signals to determine alignment status, substituting mechanical alignment procedures with an electronic detection and analysis system.
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
Effectively determines the alignment of the ultrasonic horn with the anvil, ensuring consistent and desirable weld joint structural characteristics by providing real-time alignment feedback.
Implementation Method 1
when the ultrasonic horn is vibrating and contacting the anvil
Implementation Method 2
first and second accelerometer sensors are configured to generate first and second signals, respectively, indicative of first and second accelerations
Data Source
AI summary
A system and a method for determining whether an ultrasonic horn is aligned with an anvil of an ultrasonic welding system are provided. The first and second accelerometer sensors generate first and second signals indicative of first and second accelerations of first and second positions on a bracket coupled to the anvil when the ultrasonic horn is vibrating and contacting the anvil. The system further includes a microprocessor that receives the first and second signals. The microprocessor determines a difference between an amplitude of the first signal at a first time and an amplitude of the second signal at the first time. The microprocessor stores a first identifier value in a memory device indicating that the ultrasonic horn is aligned with the anvil if the difference between the amplitude of the first signal and the amplitude of the second signal is less than or equal to a threshold value.