Manual Shaker Transducer Test System
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Solution Overview
Problem
Existing methods for testing accelerometers and velocity transducers are cumbersome and expensive, making field testing impractical due to the need for bulky and costly electromechanical shakers and spectrum analyzers.
Innovation Solution
A compact transducer test system comprising a manual shaker and signal conditioner unit that allows technicians to manually shake reference and test accelerometers, comparing their output signals to determine pass or fail conditions using LEDs and adjustable thresholds, eliminating the need for expensive equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional electromechanical shaker and spectrum analyzer are used for testing, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses a reference accelerometer with known good performance to create a baseline for comparison. Instead of using complex spectrum analyzers, the system copies the testing function through direct comparison between the reference transducer and the transducer under test, using simple electronic components to achieve the measurement objective.
Solution Approach 2:
The patent replaces the complex electromechanical shaker system with a manual shaker that can be operated by hand. This substitution maintains the essential vibration function needed for testing while dramatically reducing device complexity, cost, and portability requirements.
2Measurement precision
If traditional electromechanical shaker system is used, then testing accuracy is improved, but portability deteriorates
Solution Approach 1:
The patent replaces the heavy electromechanical shaker with a manual shaker that can be operated by hand. This substitution maintains the essential vibration function needed for testing while dramatically reducing weight and improving portability for field testing applications.
Solution Approach 2:
The system uses a reference transducer to copy the testing function, eliminating the need for heavy laboratory equipment. The comparison method allows accurate testing to be performed with minimal equipment weight by using the reference transducer as the measurement standard.
3Measurement precision
If traditional spectrum analyzer is used, then measurement precision is improved, but cost increases
Solution Approach 1:
The patent uses a reference accelerometer with known good performance to create a baseline for comparison. This copying approach eliminates the need for expensive spectrum analyzers while maintaining measurement precision through direct comparison between the reference and test transducers using simple electronic components.
Solution Approach 2:
The patent replaces expensive spectrum analyzers with inexpensive electronic components including operational amplifiers, filters, and voltmeters. These cheaper components perform the necessary signal conditioning and comparison functions without requiring costly laboratory equipment.
4Device complexity
If manual shaker and signal conditioner are used, then device complexity is reduced, but ease of operation may worsen
Solution Approach 1:
The patent employs a reference transducer that serves itself as the measurement standard, eliminating the need for complex automated control systems. The manual shaker allows the technician to directly control the vibration, and the signal conditioner automatically performs the comparison and displays pass/fail results, making the system self-sufficient and easy to operate.
Solution Approach 2:
The patent uses visual indicators such as LED lights or color-coded displays to show pass/fail results. This provides immediate, intuitive feedback to the technician without requiring interpretation of complex waveforms or data, significantly improving ease of operation in field conditions.
Data Source
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AI summary
A transducer test system for testing accelerometers or velocity transducers includes a signal conditioner and a shaker that can be used in a field environment, for example by an avionics technician at an aircraft. A test transducer and a reference transducer, which is a known-good version of the test transducer, are mounted onto the shaker and electrically connected to the signal conditioner. The technician shakes the two transducers simultaneously by manually shaking the shaker. The signal conditioner receives and compares the signals output from the test and reference transducer in order to determine the operating condition of the test transducer.