Force Measuring Device With Dual Acceleration Sensors
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Solution Overview
Problem
Force-measuring devices with acceleration sensors face systematic measurement errors due to dynamic forces, especially when used across varying frequency ranges and acceleration values, limiting their applicability to specific conditions and requiring multiple devices for different applications.
Innovation Solution
The use of at least two acceleration sensors with different sensitivity characteristics on the force transducer, one with constant sensitivity up to 100 Hz and another up to 1 kHz, allows for precise acceleration measurements and error compensation across a wide range of applications, enabling a single device to deliver accurate results in diverse dynamic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single acceleration sensor is used in the force measuring device, then the device complexity is reduced and manufacturing costs are lowered, but the measurement precision deteriorates when used across different frequency ranges and acceleration values
Solution Approach 1:
The patent applies universality by designing a force measuring device that can accurately measure forces across multiple frequency ranges (low frequency up to 100 Hz and high frequency up to 1 kHz) using a single device configuration. The device achieves multi-functionality by incorporating acceleration sensors with different sensitivity characteristics that can handle different acceleration values, allowing the same device to serve diverse measurement applications without requiring multiple specialized devices.
Solution Approach 2:
The patent applies parameter changes by selecting acceleration sensors with different sensitivity characteristics to match different measurement conditions. The first acceleration sensor has sensitivity optimized for lower acceleration values (constant up to 100 Hz), while the second has sensitivity optimized for higher acceleration values (constant up to 1 kHz). By changing the sensitivity parameter of the acceleration sensor based on the measurement requirements, the device maintains high measurement precision across varying operational parameters.
2Adaptability or versatility
If acceleration sensors with different sensitivity characteristics are arranged on the force transducer, then the adaptability to different applications is improved, but the device complexity and manufacturing costs increase
Solution Approach 1:
The patent achieves universality by creating a single force measuring device that can adapt to multiple applications across different frequency ranges (up to 100 Hz and up to 1 kHz) and different acceleration values. This is accomplished by integrating acceleration sensors with different sensitivity characteristics into the same device, allowing it to function effectively whether measuring low-frequency vibrations or high-frequency dynamic forces, thereby eliminating the need for multiple specialized devices.
Solution Approach 2:
The patent applies dynamics by making the sensor configuration adaptable to different measurement conditions. The device incorporates multiple acceleration sensors with different sensitivity characteristics, allowing the system to dynamically select or switch between sensors based on the specific measurement requirements (frequency range and acceleration magnitude). This dynamic adaptability enables the device to optimize its performance for each specific application scenario.
3Measurement precision
If multiple acceleration sensors with different sensitivity characteristics are used, then the force measurement accuracy across diverse conditions is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The patent applies universality by designing a single force measuring device that can accurately measure forces across diverse conditions (different frequency ranges up to 100 Hz and 1 kHz, different acceleration values) using one integrated system. This universal design eliminates the need to manufacture and stock multiple specialized devices for different applications, actually simplifying the overall manufacturing strategy despite incorporating multiple sensor types.
Solution Approach 2:
The patent applies parameter changes by selecting acceleration sensors with different sensitivity characteristics that can be integrated into the force measuring device. The first acceleration sensor has sensitivity optimized for lower acceleration values while the second has sensitivity optimized for higher acceleration values. By changing the sensitivity parameter of the integrated sensors, the device maintains high measurement precision across varying operational parameters without requiring complex custom manufacturing for each application.
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
This configuration enables precise force measurements across a broad range of applications, reducing production costs and eliminating the need for multiple devices, while maintaining high accuracy and adaptability.
Implementation Method 1
an acceleration sensor arranged on the force transducer... to measure the accelerations exerted on the force transducer
Data Source
Figure 1
Figure 2~3
AI summary
The force measuring device (1) comprises a force transducer (5) that includes a force application region (6) and a force measuring region (7). A force sensor (9) is arranged in the force measuring region. An application unit (18) is used for applying the dynamic forces to the force transducer on which the acceleration sensors (10,11) are arranged. The acceleration sensors are set with different sensitivity curves and are spaced apart from the force application region at the force transducer.