Reports.Piezo History

Hide minor edits - Show changes to output

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*Macimum Operating Voltage
to:
*Maximum Operating Voltage
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*Capacitance
->1.36 x 10-9 F ; Dissipation Factor of 0.018 @ 10 KHz ; Impedance of 12§Ú@ 10§Ơ
Changed lines 20-22 from:
The DT series sensor are the simplest and standard form piezo film sensors.The DT film element
produces more than 10millivolts per millivolts per microstrain, about 60dB higher than the voltage out-put of a foil strain gage.
The capacitance is proportional to the area and inversely proportional to the thickness of the element.
to:
The DT series sensor are the simplest and standard form piezo film sensors.The capacitance is proportional to the area and inversely proportional to the thickness of the element.
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to:
[-image from www.makingthings.com-]
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Swingphony Orchestra
to:
[[http://itp.nyu.edu/physcomp/sensors/Applications/SwingphonyOrchestra|Swingphony Orchestra]]
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*''Resester''
to:
*''Resister''
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*''Diod''
->Zener diod allows electrical energy to pass up to a certain voltage and cuts the rest off.
to:
*''Diode''
->Zener diode allows electrical energy to pass up to a certain voltage and cuts the rest off.
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to:
Swingphony Orchestra
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!!!Schematic & diagram
to:
http://magentamist.com/ITP/sensor/image/hookup.jpg
!!!Schematic
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to:
http://magentamist.com/ITP/sensor/image/op.jpg
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!!!Structure
to:
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!!!Structure

http://magentamist.com/ITP/sensor/image/LDTM-028K-detail.jpg
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!Simple Concept Diagram
to:
->'''Simple Concept Diagram'''
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to:
!Simple Concept Diagram

http://magentamist.com/ITP/sensor/image/concepdiagram.jpg
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http://itp.nyu.edu/~mjl359/sensors/images/.jpg
to:
http://magentamist.com/ITP/sensor/image/LDTM-028K.jpg
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to:
http://itp.nyu.edu/~mjl359/sensors/images/.jpg
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||!!Model ||!!Part Number||!!Capacitance||
to:
||!Model ||!Part Number||!Capacitance||
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||border=0.5 width=50%
||Model Name||Part Number||Capacitance||
to:
||border=1 width=50%
||!!Model ||!!Part Number||!!Capacitance||
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||border=1 width=50%
||!Sensor name:||!Port at rfPIC12F675||
to:
||border=0.5 width=50%
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||Voltage:||Port1/ Analog Port1||
||Temperature:||Port2/ Analog Port 2||
||Movement:||Port3||
||Light:||Port4/Analog Port3||
||LED:||Port5||






to:
||Model Name||Part Number||Capacitance||
||LDT0-028K/L||0-1002794-1||500 pF||
||DT1-028K/L||1-1002908-0||1.3 nF||
||DT1-052K/L||2-1002908-0||650 pF||
||DT2-028K/L||1-1003744-0||2.6 nF||
||DT4-028K/L||1-1002150-0||9 nF||
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!!! Description Part No. Capacitance
to:
->Description Part No. Capacitance
||border=1 width=50%
||!Sensor name:||!Port at rfPIC12F675||

||Voltage:||Port1/ Analog Port1||
||Temperature:||Port2/ Analog Port 2||
||Movement:||Port3||
||Light:||Port4/Analog Port3||
||LED:||Port5||
Changed lines 115-129 from:
Basic Editing - Text Formatting Rules - Documentation Index
Tables: Simple - Advanced

Paragraphs: for a new paragraph, use a blank line;
-> to indent text, -< hanging text Line break: \\ or [[<<]]

Lists: * for bullet lists, # for numbered lists, :term:definition for definition lists
Emphasis: ''italics'', '''bold''', '''''bold italics''''', @@typewriter@@ (monospaced)
References: [[another page]], [[http://www.example.com]], [[another page | link text]], [[#anchor]]
Groups: [[Group/Page]] displays Page, [[Group.Page]] displays Group.Page, [[Group(.Page)]] displays Group
Separators: !!, !!! for headings, ---- for horizontal line
Other markups: [+bigger+], [-smaller-], '^superscript^', '_subscript_', {+inserted+}, {-deleted-} Prevent formatting: [=...=]
Preformatted block: [@...@]
to:
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*DT Series Elements
to:
*''DT Series Elements''
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*LDT Series Elements with Lead Attachment and Lamination
to:
*''LDT Series Elements with Lead Attachment and Lamination ''
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*Resester
to:
*''Resester''
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*Diod
to:
*''Diod''
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For more technical introduction, see Practical Electronics for Inventors by Paul Scherz & The IC OpAmp Cookbook by Walter C.Jung
to:
[-For more technical introduction, see Practical Electronics for Inventors by Paul Scherz & The IC OpAmp Cookbook by Walter C.Jung-]
Changed lines 90-91 from:
I also recommend referencing Piezo System,INC's website for more information.
Specifically, Technical/FAQ's section got more details about[[http://www.piezo.com/tech2intropiezotrans.html | Piezoelectricity ]] and
to:
I also recommend referencing [[http://www.piezo.com/|Piezo System,INC]] website for more information.
Specifically, [[http://www.piezo.com/tech3faq.html|Technical/FAQ]]'s section got more details about[[http://www.piezo.com/tech2intropiezotrans.html | Piezoelectricity ]] and
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*Accelerometer
to:
*'''Accelerometer'''
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*Vibration/Motion Film Sensor
to:
*'''Vibration/Motion Film Sensor'''
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*Ultrasound
to:
*'''Ultrasound'''
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*Audio/Acoustic
to:
*'''Audio/Acoustic'''
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*Traffic Sensors
to:
*'''Traffic Sensors'''
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The ¡®L¡¯ in LDT stands for ¡®laminated¡¯ sensor. Typically, a 0.005" (125 ¥́m)
polyester
layer is laminated to a 28 ¥́m or 52 ¥́m piezo film element. When used in a
¡®bending¡¯ mode, laminated film elements develop much higher voltage output when
flexed than non-laminated (i.e., DT series) elements.
to:
The 'L' in LDT stands for 'laminated' sensor. Typically, a 0.005" (125&#13211;)polyester layer is laminated to a 28 &#13211; or 52 &#13211; piezo film element. When used in a 'bending' mode, laminated film elements develop much higher voltage output when flexed than non-laminated (i.e., DT series) elements.
Changed lines 104-105 from:
'''@@Ampilification -Op amp@@'''
to:
'''Ampilification -Op amp'''
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'''Ampilification -Op amp'''
to:
'''@@Ampilification -Op amp@@'''
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Op amp(Operational Amplifier) take a very small voltage signal and amplify it to a range that's

readable.
to:
Op amp(Operational Amplifier) take a very small voltage signal and amplify it to a range that's readable.
Changed lines 113-116 from:
For more technical introduction, see Practical Electronics for Inventors by Paul Scherz & The IC

OpAmp Cookbook by Walter C.Jung
to:
For more technical introduction, see Practical Electronics for Inventors by Paul Scherz & The IC OpAmp Cookbook by Walter C.Jung
Changed line 94 from:
Specifically, Technical/FAQ s section got more details about[[http://www.piezo.com/tech2intropiezotrans.html | Piezoelectricity ]] and
to:
Specifically, Technical/FAQ's section got more details about[[http://www.piezo.com/tech2intropiezotrans.html | Piezoelectricity ]] and
Changed lines 104-107 from:
Ampilification -Op amp

Op amp(Operational Amplifier) take a very small voltage signal and amplify it to a range that¡¯s
to:
'''Ampilification -Op amp'''

Op amp(Operational Amplifier) take a very small voltage signal and amplify it to a range that's
Changed lines 93-99 from:
I also recommend referencing Piezo System,INC¡¯s website for more information.
Specifically, Technical/FAQ¡¯s section got more details about

[[http://www.piezo.com/tech2intropiezotrans.html | Piezoelectricity ]]and

[[http://www.piezo.com/tech5reading.html | nice lists of recommended reading]].
to:
I also recommend referencing Piezo System,INC's website for more information.
Specifically, Technical/FAQ s section got more details about[[http://www.piezo.com/tech2intropiezotrans.html | Piezoelectricity ]] and
[[http://www.piezo.com/tech5reading.html | Nice lists of recommended reading]].
Changed lines 78-79 from:
->DC : 280 V
->AC : 840 V
to:
->DC : 280 V
->AC : 840 V
Changed lines 81-82 from:
->6-9 kgF (voltage output of 830 to 1275 V)
to:
->6-9 kgF (voltage output of 830 to 1275 V)
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Datasheets
Technical Manual
to:
[[http://rocky.digikey.com/WebLib/Measurement%20Specialties%20Inc/Web%20Data/Piezo%20Film%20Sensors.pdf|Datasheets]]
[[http://www.meas-spec.com/mymsi/download/pdf/english/piezo/techman.pdf|Technical Manual]]
Changed lines 62-64 from:
[[http://web.mit.edu/kumpf/www/guitarpickup.html | Make Your Own Acoustic Guitar Pickup]]__[-student project-]
[[http://itp-pcom-ta.blogspot.com/2005/10/if-it-aint-got-that-swing.html| If it ain't got that swing...]]__[-student project-]
to:
[[http://web.mit.edu/kumpf/www/guitarpickup.html |Make Your Own Acoustic Guitar Pickup]]__[-student project-]

[[http://itp-pcom-ta.blogspot.com/2005/10/if-it-aint-got-that-swing.html|If it ain't got that swing...]]__[-student project-]
Changed lines 62-64 from:
**[[http://web.mit.edu/kumpf/www/guitarpickup.html | Make Your Own Acoustic Guitar Pickup]]--[-student project-]
**[[http:
//itp-pcom-ta.blogspot.com/2005/10/if-it-aint-got-that-swing.html| If it ain't got that swing...]]--[-student project-]
to:
[[http://web.mit.edu/kumpf/www/guitarpickup.html | Make Your Own Acoustic Guitar Pickup]]__[-student project-]
[[http://itp-pcom-ta.blogspot.com/2005/10/if-it-aint-got-that-swing.html| If it ain't got that swing...]]__[-student project-]
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->''DT series''
to:
->'''''DT series'''''
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->''LDT series''
to:
->'''''LDT series'''''
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->Vending
to:
->''Vending''
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->Appliance Monitering
to:
->''Appliance Monitering''
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->DT series
to:
->''DT series''
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->LDT series
to:
->''LDT series''
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LDT series
to:
->LDT series
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Vending
to:
->Vending
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-->Appliance Monitering
to:
->Appliance Monitering
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->LDT series
to:
LDT series
Changed line 41 from:
-->Vending
to:
Vending
Deleted lines 36-37:
**Car Alarm
**Biomedical Monitoring
Changed lines 62-72 from:
**[[http://web.mit.edu/kumpf/www/guitarpickup.html | Make Your Own Acoustic Guitar

Pickup]]--student project
**[[http://itp-pcom-ta.blogspot.com/2005/10/if-it-aint-got-that-swing.html| If it ain't got that

swing...]]--student project

Good Application notes from [[http://www.meas-spec.com/myMSI/sensors/filmElements.asp |

MSI ]] site.
to:
**[[http://web.mit.edu/kumpf/www/guitarpickup.html | Make Your Own Acoustic Guitar Pickup]]--[-student project-]
**[[http://itp-pcom-ta.blogspot.com/2005/10/if-it-aint-got-that-swing.html| If it ain't got that swing...]]--[-student project-]

Good Application notes from [[http://www.meas-spec.com/myMSI/sensors/filmElements.asp | MSI ]] site.
Changed line 73 from:
1.36 x 10-9 F ; Dissipation Factor of 0.018 @ 10 KHz ; Impedance of 12§Ú@ 10§Ơ
to:
->1.36 x 10-9 F ; Dissipation Factor of 0.018 @ 10 KHz ; Impedance of 12§Ú@ 10§Ơ
Changed lines 75-76 from:
DC : 280 V
AC : 840 V
to:
->DC : 280 V
->AC : 840 V
Changed lines 78-79 from:
6-9 kgF (voltage output of 830 to 1275 V)
to:
->6-9 kgF (voltage output of 830 to 1275 V)
Deleted line 34:
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**Car Alarm
**Biomedical Monitoring
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Deleted line 55:
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DT series-
to:
->DT series
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LDT series-
to:
->LDT series
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Vending
to:
-->Vending
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Appliance Monitering
to:
-->Appliance Monitering
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****DT series-
to:
DT series-
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****LDT series-
to:
LDT series-
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****Vending
to:
Vending
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****Appliance Monitering
to:
Appliance Monitering
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->DT Series Elements
to:
*DT Series Elements
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->LDT Series Elements with Lead Attachment and Lamination
to:
*LDT Series Elements with Lead Attachment and Lamination
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DT Series Elements
to:
->DT Series Elements
Changed lines 18-25 from:

produces more than 10millivolts per millivolts per microstrain, about 60dB higher than the voltage

out-put of a foil strain gage. The capacitance is proportional to the area and inversely proportional

to the thickness of the element.
LDT Series Elements with Lead Attachment and Lamination
to:
produces more than 10millivolts per millivolts per microstrain, about 60dB higher than the voltage out-put of a foil strain gage. The capacitance is proportional to the area and inversely proportional to the thickness of the element.

->
LDT Series Elements with Lead Attachment and Lamination
Changed line 5 from:
I chose the '''''LDTM-028K''''', a laminated Piezo sensor from [[http://www.meas-spec.com/myMSI/default/index.asp|measurement specialties ]] It is different from resistive
to:
I chose the '''''LDTM-028K''''', a laminated Piezo sensor from [[http://www.meas-spec.com/myMSI/default/index.asp|measurement specialties ]]. It is different from resistive
Changed lines 5-8 from:
I chose the '''''LDTM-028K''''', a laminated Piezo sensor from [[http://www.meas-

spec.com/myMSI/default/index.asp| measurement specialties ]] It is different from resistive
to:
I chose the '''''LDTM-028K''''', a laminated Piezo sensor from [[http://www.meas-spec.com/myMSI/default/index.asp|measurement specialties ]] It is different from resistive
Changed lines 7-15 from:

response to applied stresses. When the piezo film is bent from the mechanical neutral axis, a very

high strain within the piezo polymer is created and generates a high voltage. This voltage is

created only as the sensor is deformed. The sensor produces positive voltages when they're

deformed in one direction, and negative voltages when deformed in the other.
to:
response to applied stresses. When the piezo film is bent from the mechanical neutral axis, a very high strain within the piezo polymer is created and generates a high voltage. This voltage is created only as the sensor is deformed. The sensor produces positive voltages when they're deformed in one direction, and negative voltages when deformed in the other.
Changed lines 5-6 from:
I chose the '''LDTM-028K''', a laminated Piezo sensor from [[http://www.meas-
to:
I chose the '''''LDTM-028K''''', a laminated Piezo sensor from [[http://www.meas-
Changed lines 5-6 from:
I chose the ''''LDTM-028K'''', a laminated Piezo sensor from [[http://www.meas-
to:
I chose the '''LDTM-028K''', a laminated Piezo sensor from [[http://www.meas-
Changed lines 5-6 from:
I chose the ""LDTM-028K"", a ¡®laminated¡¯ Piezo sensor from [[http://www.meas-
to:
I chose the ''''LDTM-028K'''', a laminated Piezo sensor from [[http://www.meas-
Changed lines 5-6 from:
I chose the LDTM-028K, a ¡®laminated¡¯ Piezo sensor from [[http://www.meas-
to:
I chose the ""LDTM-028K"", a ¡®laminated¡¯ Piezo sensor from [[http://www.meas-
Changed line 134 from:
->You can change the amplification factor of the op amp by changing the two resistors attached to the negative input pin.-<
to:
->You can change the amplification factor of the op amp by changing the two resistors attached to the negative input pin.
Changed lines 136-137 from:
->Zener diod allows electrical energy to pass up to a certain voltage and cuts the rest off.-<
to:
->Zener diod allows electrical energy to pass up to a certain voltage and cuts the rest off.
Changed lines 134-136 from:
You can change the amplification factor of the op amp by changing the two resistors attached to the

negative input pin.
to:
->You can change the amplification factor of the op amp by changing the two resistors attached to the negative input pin.-<
Changed lines 136-137 from:
Zener diod allows electrical energy to pass up to a certain voltage and cuts the rest off.
to:
->Zener diod allows electrical energy to pass up to a certain voltage and cuts the rest off.-<
Added lines 146-161:

Basic Editing - Text Formatting Rules - Documentation Index
Tables: Simple - Advanced

Paragraphs: for a new paragraph, use a blank line;
-> to indent text, -< hanging text Line break: \\ or [[<<]]

Lists: * for bullet lists, # for numbered lists, :term:definition for definition lists
Emphasis: ''italics'', '''bold''', '''''bold italics''''', @@typewriter@@ (monospaced)
References: [[another page]], [[http://www.example.com]], [[another page | link text]], [[#anchor]]
Groups: [[Group/Page]] displays Page, [[Group.Page]] displays Group.Page, [[Group(.Page)]] displays Group
Separators: !!, !!! for headings, ---- for horizontal line
Other markups: [+bigger+], [-smaller-], '^superscript^', '_subscript_', {+inserted+}, {-deleted-} Prevent formatting: [=...=]
Preformatted block: [@...@]
Added lines 1-145:
Initial reported by [[~ehk235 | Erin Kim]], 2 November, 2005

!!!Introduction

I chose the LDTM-028K, a ¡®laminated¡¯ Piezo sensor from [[http://www.meas-

spec.com/myMSI/default/index.asp| measurement specialties ]] It is different from resistive

sensors such as the bend sensor and the photocell sensor because they generate electricity in

response to applied stresses. When the piezo film is bent from the mechanical neutral axis, a very

high strain within the piezo polymer is created and generates a high voltage. This voltage is

created only as the sensor is deformed. The sensor produces positive voltages when they're

deformed in one direction, and negative voltages when deformed in the other.

!!!Structure







DT Series Elements
The DT series sensor are the simplest and standard form piezo film sensors.The DT film element

produces more than 10millivolts per millivolts per microstrain, about 60dB higher than the voltage

out-put of a foil strain gage. The capacitance is proportional to the area and inversely proportional

to the thickness of the element.
LDT Series Elements with Lead Attachment and Lamination

The ¡®L¡¯ in LDT stands for ¡®laminated¡¯ sensor. Typically, a 0.005" (125 ¥́m)
polyester layer is laminated to a 28 ¥́m or 52 ¥́m piezo film element. When used in a
¡®bending¡¯ mode, laminated film elements develop much higher voltage output when
flexed than non-laminated (i.e., DT series) elements.

!!!Applications

TYPICAL APPLICATIONS FOR PIEZO FILM SENSORS

*Accelerometer
**Car Alarm
**Biomedical Monitoring

*Vibration/Motion Film Sensor
****DT series-
**Dynamic Strain Gages
**Musical Instrument Triggers
****LDT series-
**Antitheft Alarm
****Vending
**Dispensing Verification
**Coin Drop Counters
**Antitamper
**Penetration Panels
****Appliance Monitering
**Microwave - Sound Pickup
**Washer Imbalance
**Water Flow Sensor

*Ultrasound
**Shockwave Sensors
**Air-Ranging Proximity
**Robotic Tactile Sensors

*Audio/Acoustic
**Microphones
**Speakers
*Traffic Sensors
**Vehicle Classification
**Airport Taxiway

Here are more examples using Piezo element.
**[[http://web.mit.edu/kumpf/www/guitarpickup.html | Make Your Own Acoustic Guitar

Pickup]]--student project
**[[http://itp-pcom-ta.blogspot.com/2005/10/if-it-aint-got-that-swing.html| If it ain't got that

swing...]]--student project

Good Application notes from [[http://www.meas-spec.com/myMSI/sensors/filmElements.asp |

MSI ]] site.

!!!Electrical Characteristics

Datasheets
Technical Manual

*Capacitance
1.36 x 10-9 F ; Dissipation Factor of 0.018 @ 10 KHz ; Impedance of 12§Ú@ 10§Ơ
*Macimum Operating Voltage
DC : 280 V
AC : 840 V
*Maximum Applied Force
6-9 kgF (voltage output of 830 to 1275 V)

!!! Description Part No. Capacitance









I also recommend referencing Piezo System,INC¡¯s website for more information.
Specifically, Technical/FAQ¡¯s section got more details about

[[http://www.piezo.com/tech2intropiezotrans.html | Piezoelectricity ]]and

[[http://www.piezo.com/tech5reading.html | nice lists of recommended reading]].

!!!Microcontroller Connection




!!!Schematic & diagram

Ampilification -Op amp

Op amp(Operational Amplifier) take a very small voltage signal and amplify it to a range that¡¯s

readable.

*Resester
You can change the amplification factor of the op amp by changing the two resistors attached to the

negative input pin.
*Diod
Zener diod allows electrical energy to pass up to a certain voltage and cuts the rest off.

For more technical introduction, see Practical Electronics for Inventors by Paul Scherz & The IC

OpAmp Cookbook by Walter C.Jung

!!! Application Notes
Deleted lines 0-65:
Initial reported by [[~ehk235 | Erin Kim]], 2 November, 2005

!!!Introduction

I chose the LDTM-028K, a ‘laminated’ Piezo sensor from [[http://www.meas-spec.com/myMSI/default/index.asp| measurement specialties ]] It is different from resistive sensors such as the bend sensor and the photocell sensor because they generate electricity in response to applied stresses. When the piezo film is bent from the mechanical neutral axis, a very high strain within the piezo polymer is created and generates a high voltage. This voltage is created only as the sensor is deformed. The sensor produces positive voltages when they're deformed in one direction, and negative voltages when deformed in the other.

!!!Structure

ThisWiki:/uploads/Reports/LDTM-028K.jpg





DT Series Elements
The DT series sensor are the simplest and standard form piezo film sensors.The DT film element produces more than 10millivolts per millivolts per microstrain, about 60dB higher than the voltage out-put of a foil strain gage. The capacitance is proportional to the area and inversely proportional to the thickness of the element.
LDT Series Elements with Lead Attachment and Lamination

The ‘L’ in LDT stands for ‘laminated’ sensor. Typically, a 0.005" (125 ́m)
polyester layer is laminated to a 28 ́m or 52 ́m piezo film element. When used in a
‘bending’ mode, laminated film elements develop much higher voltage output when
flexed than non-laminated (i.e., DT series) elements.

!!!Applications

TYPICAL APPLICATIONS FOR PIEZO FILM SENSORS

*Accelerometer
**Car Alarm
**Biomedical Monitoring

*Vibration/Motion Film Sensor
****DT series-
**Dynamic Strain Gages
**Musical Instrument Triggers
****LDT series-
**Antitheft Alarm
****Vending
**Dispensing Verification
**Coin Drop Counters
**Antitamper
**Penetration Panels
****Appliance Monitering
**Microwave - Sound Pickup
**Washer Imbalance
**Water Flow Sensor

*Ultrasound
**Shockwave Sensors
**Air-Ranging Proximity
**Robotic Tactile Sensors

*Audio/Acoustic
**Microphones
**Speakers
*Traffic Sensors
**Vehicle Classification
**Airport Taxiway

Here are more examples using Piezo element.
**[[http://web.mit.edu/kumpf/www/guitarpickup.html | Make Your Own Acoustic Guitar Pickup]]--student project
**[[http://itp-pcom-ta.blogspot.com/2005/10/if-it-aint-got-that-swing.html| If it ain't got that swing...]]--student project

!!!Electrical Characteristics
Changed lines 9-14 from:
ThisWiki:/uploads/Reports/gp.jpg
to:
ThisWiki:/uploads/Reports/LDTM-028K.jpg
Changed lines 9-14 from:
to:
ThisWiki:/uploads/Reports/gp.jpg
Added lines 1-66:
Initial reported by [[~ehk235 | Erin Kim]], 2 November, 2005

!!!Introduction

I chose the LDTM-028K, a ‘laminated’ Piezo sensor from [[http://www.meas-spec.com/myMSI/default/index.asp| measurement specialties ]] It is different from resistive sensors such as the bend sensor and the photocell sensor because they generate electricity in response to applied stresses. When the piezo film is bent from the mechanical neutral axis, a very high strain within the piezo polymer is created and generates a high voltage. This voltage is created only as the sensor is deformed. The sensor produces positive voltages when they're deformed in one direction, and negative voltages when deformed in the other.

!!!Structure







DT Series Elements
The DT series sensor are the simplest and standard form piezo film sensors.The DT film element produces more than 10millivolts per millivolts per microstrain, about 60dB higher than the voltage out-put of a foil strain gage. The capacitance is proportional to the area and inversely proportional to the thickness of the element.
LDT Series Elements with Lead Attachment and Lamination

The ‘L’ in LDT stands for ‘laminated’ sensor. Typically, a 0.005" (125 ́m)
polyester layer is laminated to a 28 ́m or 52 ́m piezo film element. When used in a
‘bending’ mode, laminated film elements develop much higher voltage output when
flexed than non-laminated (i.e., DT series) elements.

!!!Applications

TYPICAL APPLICATIONS FOR PIEZO FILM SENSORS

*Accelerometer
**Car Alarm
**Biomedical Monitoring

*Vibration/Motion Film Sensor
****DT series-
**Dynamic Strain Gages
**Musical Instrument Triggers
****LDT series-
**Antitheft Alarm
****Vending
**Dispensing Verification
**Coin Drop Counters
**Antitamper
**Penetration Panels
****Appliance Monitering
**Microwave - Sound Pickup
**Washer Imbalance
**Water Flow Sensor

*Ultrasound
**Shockwave Sensors
**Air-Ranging Proximity
**Robotic Tactile Sensors

*Audio/Acoustic
**Microphones
**Speakers
*Traffic Sensors
**Vehicle Classification
**Airport Taxiway

Here are more examples using Piezo element.
**[[http://web.mit.edu/kumpf/www/guitarpickup.html | Make Your Own Acoustic Guitar Pickup]]--student project
**[[http://itp-pcom-ta.blogspot.com/2005/10/if-it-aint-got-that-swing.html| If it ain't got that swing...]]--student project

!!!Electrical Characteristics