PVDF PIEZO membrane ,PVDF PIEZO sensors, PIEZO sensors
Characteristics
1. Piezoelectric property
It produces voltage in proportional to compressive or tensile mechanical stress or strain, which makes it a dynamic strain gauge.
2. Dielectric property and low impedance
Piezo film changes proportionally in dimension while an electric field at frequencies from 0~500MHz. This property, as well as the film’s low impedance, makes piezo film perfectly suitable for high fidelity transducers operation throughout the high audio and ultrasonic.
3. pyroelectric property
piezo film also reacts to changes in temperature with predictable, high voltage outputs
4. Chemically insert and biocompatible.
It is ideally to make vital signs transducer attached to skin or be used in medical devices.
5. high stress constant
Piezo film’s stress constant is about 10 times higher than other piezoelectric materials
6. excellent processibility
thin with low weight and low mass, can be twisted into various forms.
7.Low temperature property
It works in the temperature as low as -40°C.
Piezo Sensor Type Applications
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Accelerometer/Vibration Sensors
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Washing machine load balance, pacemaker, pedometer, motion and vibration sensors, medical vital signs and cardiac monitors, motional feedback for speakers
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Acoustic
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Musical instrument pickup, electronic stethoscope, coin validation, bone conduction microphone, perimeter security cable, acoustic speakers
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Anti-tamper panel
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Security - electronic chip protection
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Hydrophone
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Sonar
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Hypersonic speaker
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Ultrasonic directional speakers
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Load/impact
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Stamping machine load cells, passenger safety systems, target impact
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Traffic Sensor
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Traffic counters, speed, toll and red light enforcement
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Flexible switch
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Water meter cam counter, CMOS wake-up switch, door operation detection
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Piezo Cable
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Buried or fence-mounted sensor for perimeter security
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Ultrasonic digitizer
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Electronic pen input
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Ultrasonic transducer
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Fluid level sensing, process flow meter, medical imaging, subsea acoustic camera, non-destructive testing
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Specification
Detailed sizes
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30um |
160x140mm |
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50um |
160x140mm |
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50um |
200x140mm |
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100um |
200x140mm |
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200um |
200x140mm |
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500um |
250x130mm |
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500um |
260x130mm |
PVDF piezoelectric film properties
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Item
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Indicators
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Piezoelectric constant d 33
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18-32 PC/N
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Of dielectric constant ε / ε 0
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9-13 (IKHZ)
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Velocity C
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2000 m / s
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Electromechanical coupling coefficient k 33
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10-14 % -
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Volume resistivity p
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- 10 13 Ω.cm
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Pyroelectric coefficient p
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40 c/cm 2 .k
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Detection sensitivity (4HZ)
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10 11 m.HZ 1/2 /W
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Temperature T
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-40 80°C 80 °C
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Applications
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PVDF PIEZO film , PVDF PIEZO Sensors Images
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