Vibration Sensors
Vibration sensors convert mechanical vibrations into electrical signals through the piezoelectric effect, capacitive sensors, or MEMS (microelectromechanical systems). A typical structure consists of a mass, a spring element, and a signal conversion unit. Frequency response ranges from DC to 20kHz, with sensitivities ranging from 0.1mV/g to 100mV/g.
1. What are the Key Parameters of Vibration Sensors?
Sensitivity: Determines the signal output strength (e.g., 50mV/g).
Frequency Range: Industrial equipment monitoring (5-2kHz) vs. structural health monitoring (0-10kHz).
Operating Temperature: Industrial grade (-40°C to 125°C) vs. automotive grade (-40°C to 150°C).
Packaging: PCB mount, threaded mount, or magnetic.
2. What are the Typical Applications of Vibration Sensors?
Industry 4.0: Predictive maintenance (motor bearing wear detection).
Automotive Electronics: Airbag deployment, NVH (noise, harshness, and vibration) analysis.
Consumer Electronics: Mobile phone drop detection, interactive gaming.
3. Selection Recommendations for Vibration Sensors
|
Application Scenario |
Recommended Type |
Considerations |
|
High-frequency Vibration Monitoring |
MEMS accelerometers |
Consider shock resistance |
|
Low-frequency Structural Monitoring |
Piezoelectric sensors |
Consider signal conditioning circuit matching |
|
Extreme Environments |
High-temperature ceramic packaging |
Long-term stability requires verification |