Single-Sensor Vibration Detection Using Bias Voltage Superposition
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Solution Overview
Problem
Existing vibration detection systems face challenges in reducing power consumption and accurately detecting weak vibrations, often requiring additional sensors for reliable mechanical apparatus state measurement.
Innovation Solution
A vibration detecting apparatus comprising a semiconductor switch with a voltage dividing means to generate a bias voltage, which, when combined with the vibration voltage, triggers the semiconductor switch to conduct current and wake up the control means for data collection, using only one sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration sensor is always in an activated state to detect events, then detection reliability is improved, but power consumption increases
Solution Approach 1:
The system alternates between activation and standby states. The vibration sensor operates in standby mode during normal periods and is activated periodically or upon detecting specific vibration patterns, reducing overall power consumption while maintaining detection capability when events occur
2Use of energy by moving object
If a vibration sensor is kept in standby state to reduce power consumption, then power consumption is reduced, but detection of very weak vibration becomes difficult
Solution Approach 1:
The system performs preliminary preparation by keeping the vibration sensor in a low-power standby state that maintains basic sensitivity. When vibration is detected above a threshold, the system preemptively activates full detection mode to capture subsequent weak vibrations that may indicate mechanical apparatus state changes
3Measurement precision
If multiple sensors are used to detect weak vibration accurately, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system improves detection accuracy by changing operational parameters of a single vibration sensor rather than adding multiple sensors. This includes adjusting sensitivity thresholds, activation timing, and signal processing parameters to enable accurate detection of weak vibrations from mechanical apparatus state changes
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 achieves power savings while enabling the detection of very weak vibrations and performing apparatus startup and data collection with a single sensor, improving detection accuracy and reducing power consumption.
Implementation Method 1
a vibration detecting means (11), a semiconductor switch (12), a control means (13) and a power supply means (14), wherein: the semiconductor switch and the control means are connected with the power supply means; the vibration detecting means detects vibration and generates a vibration voltage
Implementation Method 2
the semiconductor switch comprises a voltage dividing means for generating a bias voltage inside
Data Source
AI summary
Provided are a vibration detector and a vibration detecting method, which are power saving, can detect vibration even if the vibration is very weak, and can perform both start-up of the apparatus and collection of data of vibration information by the use of only one sensor. The apparatus includes a vibration detector, a semiconductor switch, a controller and a power supply. The semiconductor switch and the controller are connected to the power supply. The vibration detector detects vibration and consequently generates a vibration voltage. The semiconductor switch includes a voltage divider for generating a bias voltage inside. The semiconductor switch detects a voltage produced by superposing the bias voltage onto the vibration voltage outputted from the vibration detector, and conducts current when the detected voltage is equal to or larger than a certain value. The controller wakes up with the current conducted by the semiconductor switch as a trigger signal.