Acceleration Detection Device Dynamic Sampling
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Solution Overview
Problem
Existing acceleration detecting devices for tire condition monitoring face challenges in reducing power consumption while ensuring accurate detection of wheel assembly conditions, as frequent data acquisition from the acceleration sensor increases power consumption and potentially shortens the device's lifespan.
Innovation Solution
The acceleration detecting device incorporates a specific angle detecting section that compares consecutive detection values to determine the rotation angle and ground contact, allowing for reduced power consumption by adjusting the acquisition count based on the rotation period, thereby optimizing data acquisition and extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detection value is acquired frequently from the acceleration sensor, then the condition of the wheel assembly is properly acquired, but power consumption increases and the life of the power source is shortened
Solution Approach 1:
The patent implements periodic data acquisition by setting a predetermined acquisition period for the acceleration sensor, where the sensor acquires detection values at regular intervals rather than continuously. The control section is configured to acquire detection values a predetermined number of times per rotation of the wheel assembly, creating a periodic sampling pattern that reduces overall power consumption while maintaining sufficient detection accuracy for monitoring wheel conditions.
Solution Approach 2:
The patent dynamically adjusts the acquisition period based on the rotation period of the wheel assembly. When the wheel assembly rotates faster or slower, the system changes the acquisition period accordingly to maintain an optimal number of samples per rotation. This parameter adaptation ensures that detection accuracy is maintained across varying operating conditions while minimizing unnecessary acquisitions that would increase power consumption.
2Use of energy by moving object
If the acquisition period is extended to reduce power consumption, then power consumption is reduced, but the number of times detection value is acquired per rotation decreases and detection accuracy deteriorates
Solution Approach 1:
The patent makes the acquisition period dynamic rather than fixed, allowing it to adjust based on the actual rotation period of the wheel assembly. The control section calculates the rotation period from detected values and uses this information to set an appropriate acquisition period that ensures a sufficient number of samples are taken per rotation, regardless of whether the wheel is rotating quickly or slowly. This dynamic adjustment maintains detection accuracy across varying operating conditions.
Solution Approach 2:
The system implements feedback by continuously monitoring the rotation period of the wheel assembly and using this information to adjust the acquisition period. The control section detects the rotation period from the acceleration sensor data, then uses this feedback to optimize the number of acquisitions per rotation. This closed-loop approach ensures that detection accuracy is maintained while minimizing power consumption by avoiding both excessive and insufficient sampling.
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 approach effectively reduces power consumption while maintaining accurate detection of wheel assembly conditions, allowing for proper identification of specific angles and ground contact, thereby enhancing the device's operational efficiency and longevity.
Implementation Method 1
an acceleration sensor that is configured to detect a centrifugal acceleration generated by rotation of a wheel assembly
Data Source
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AI summary
An acceleration detecting device includes a power source, an acceleration sensor, an acquiring section, a rotation period calculating section, and an acquisition period setting section. The acceleration sensor is configured to detect a centrifugal acceleration generated by rotation of a wheel assembly. The acquiring section is configured to acquire a detection value from the acceleration sensor with a predetermined acquisition period, thereby acquiring the detection value from the acceleration sensor each time the wheel assembly rotates a constant angle. The rotation period calculating section is configured to calculate a rotation period of the wheel assembly. The acquisition period setting section sets the acquisition period. The acquisition period setting section is configured to increase a number of times the detection value is acquired from the acceleration sensor per rotation of the wheel assembly as the rotation period calculated by the rotation period calculating section becomes longer.