Vibration Motor Testing via Terminal Voltage Monitoring
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Solution Overview
Problem
Existing testing devices for vibration motors in portable gas-measuring devices are unreliable, leading to high percentages of false positive or false negative test results when assessing the functionality of these motors.
Innovation Solution
A testing device that monitors the terminal voltage and/or terminal current of the vibration motor during switching-on and switching-off operations, comparing these values with predetermined desired values to determine the motor's functionality, utilizing the energy storage properties of the motor's inertia to infer correct rotation and detect any blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing testing devices use acoustic or mechanical methods to detect vibration motor functionality, then the testing can be performed, but the reliability of test results is low leading to high percentages of false positive or false negative results
Solution Approach 1:
The patent replaces acoustic detection methods and mechanical vibration sensing with an electrical measurement system that monitors terminal voltage and current characteristics. This substitution of measurement principle eliminates the reliability issues associated with acoustic and mechanical detection methods.
Solution Approach 2:
The patent changes the measurement parameter from acoustic or mechanical vibration characteristics to electrical parameters (terminal voltage and current). By monitoring the electrical characteristics during motor operation, the system achieves more reliable and precise detection of motor functionality.
2Adaptability or versatility
If the testing device integrates multiple test modules and gas supply systems for comprehensive device testing, then the testing capability is enhanced, but the device complexity increases
Solution Approach 1:
The patent integrates the vibration motor testing functionality into an existing multi-functional testing device that can test various components including gas sensors and alarm systems. The electrical measurement approach for vibration motor testing uses the same infrastructure and control systems already present for other tests, avoiding additional complexity.
Solution Approach 2:
The patent combines the vibration motor testing function with the existing testing device architecture. The terminal voltage and current measurements are performed using the same control and analysis unit that manages other test modules, merging multiple testing functions into a unified 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
The solution provides a highly precise and reliable method for testing vibration motor functionality, minimizing false results and allowing for integration into existing testing devices with minimal configuration changes, enabling effective detection of motor blockages and ensuring proper operation.
Implementation Method 1
vibration motor (2)
Implementation Method 2
a sensor component (4) for detecting at least one motor-specific measured value, wherein a terminal voltage and/or a terminal current present during a switching-on and/or switching-off operation of the vibration motor (2) on the electrical terminal (6) of the vibration motor (2) is determined on the basis of the motor-specific measured value
Data Source
AI summary
A method and a testing device (1) function test a vibration motor (2) arranged in a portable gas-measuring device (3). A sensor (4) detects a value for a motor property transmits the value to a control and analysis unit (5). The detected value is compared with a desired value, a test result is generated on the basis of the comparison, and a trigger signal is generated on the basis of the test result. A terminal voltage and/or current are determined during a switching-on and/or switching-off operation of the vibration motor (2) at an electrical terminal (6) of the vibration motor (2) on the basis of the motor property of the vibration motor (2). This terminal voltage and/or the terminal current present at least at times during the switching-on and/or switching-off operation are compared with at least one desired value in the control and analysis unit (5).