Piezoshaker Systems

The Pie­zos­ha­ker exci­ta­ti­on sys­tems are desi­gned for vibra­ti­on mea­su­re­ment and non-dest­ruc­ti­ve tes­ting and con­sist of a Pie­zos­ha­ker, a Pie­zo­am­pli­fier, and a func­tion gene­ra­tor. Optio­nal­ly, the waves of the Pie­zos­ha­ker, trans­mit­ted to the test object, can be moni­to­red by isi-sys She­aro­gra­phy / ESPI sys­tems. Our She­aro­gra­phy / ESPI sys­tems enab­le us to moni­tor full field vibra­ti­on such as e. g. natu­ral object vibra­ti­ons. Ano­t­her app­li­ca­ti­on of the Pie­zos­ha­ker-Sys­tem is for exci­ta­ti­on with acoustic and ultra­so­nic waves in the field of mate­ri­al pro­ces­sing and manu­fac­tu­ring tech­no­lo­gy. The Pie­zos­ha­ker-Sys­tem Set­up is shown in the figu­re on the left.

 

 

 

 

 

 

 

 

 

 

The video on the right shows the lamb waves, gene­ra­ted by the Pie­zos­ha­ker that is atta­ched at the bot­tom of the spe­ci­men. The waves tra­vel across the object’s sur­face and exci­te the five local sub­sur­face defects on the top. The local defects vibra­te dif­fer­ent­ly, depen­ding on their local mecha­ni­cal pro­per­ties (stiff­ness). Only very litt­le power of the Pie­zos­ha­ker is requi­red, when the exci­ta­ti­on fre­quen­cy is clo­se to the local defect reso­nance fre­quen­cy. This princip­le is used in non-dest­ruc­ti­ve tes­ting, for examp­le, espe­cial­ly to loca­te dela­mi­na­ti­ons in sandwich struc­tures. Here, usual­ly, the Pie­zos­ha­kers of the PS‑X seri­es with vacu­um adap­ter are used.


Piezoshaker:

NEW PS-W-02 for continuous operation in automated production lines

The PS W 02 Seri­es is per­fect­ly sui­ta­ble for con­ti­nuous ope­ra­ti­on due to its inno­va­ti­ve coo­ling sys­tem with for­ced con­vec­tion by com­pres­sed air. The Pie­zos­ha­ker is inten­ded to be moun­ted to a pneu­ma­tic cylin­der, which is used to press the con­ta­ct pin to the mea­su­ring object’s sur­face. This method allows the con­ta­ct pres­su­re to be con­trol­led by the user. The con­ta­ct pin is exch­an­ge­ab­le and can be adap­ted to cus­to­mer requi­re­ments. Due to its small con­ta­ct area, it can be pla­ced on small sur­faces. With the PS-W-02 Seri­es, dyna­mic exci­ta­ti­on is pos­si­ble in both sta­tio­na­ry and moving modes, allowing mate­ri­al exci­ta­ti­on in con­ti­nuous manu­fac­tu­ring pro­ces­ses. This Pie­zos­ha­ker-Seri­es fea­tures an inter­nal tem­pe­ra­tu­re sensor.

App­li­ca­ti­ons: Dyna­mic Exci­ta­ti­on for Wel­ding Processes


NEW PS-X-04 for High Dynamic Operation

The PS-X-04 Seri­es is desi­gned light­weight and com­pact for moun­ting on the test object sur­face by vacu­um. Using the sli­ding val­ve, the Pie­zos­ha­ker can easi­ly be atta­ched or remo­ved from the mate­ri­al sur­face. It con­tains an axi­al mova­ble Suc­tion Cup Adap­ter (Sealing), which allows the Pie­zos­ha­ker to be easi­ly atta­ched to con­ca­ve or con­vex sur­faces with level dif­fe­ren­ces up to 6mm. The PS-X-04 sup­ports dyna­mic vibra­ti­on exci­ta­ti­on in a fre­quen­cy ran­ge up to 100 kHz. Dif­fe­rent pneu­ma­tic con­nec­ting ele­ments are available.

 

 

 

PS-X-03 Series with Suction Cup adapter

Piezoshaker_small

The PS-X-03-Seri­es is desi­gned for non-dest­ruc­ti­ve tes­ting pur­po­ses in com­bi­na­ti­on with ESPI/Shearography. It is fixed on the object’s sur­face by vacu­um via a suc­tion cup. The pres­sing for­ce is adjus­ta­ble by the vacu­um level. Dif­fe­rent actua­tor types are avail­ab­le for dif­fe­rent fre­quen­cy ran­ges and for­ces in com­bi­na­ti­on with dif­fe­rent coun­ter­weight mass.

 

 

 

App­li­ca­ti­ons:

Dyna­mic loading on a lar­ge yacht hull

Dyna­mic loading on a wind tur­bi­ne bla­de and resin bridges

Dyna­mic exci­ta­ti­on on a spacecraft

Dyna­mic loading on a yacht mast

Dyna­mic loading on rud­der blade


PS-AC‑X Series with active cooling

The Pie­zos­ha­ker PS-AC‑X seri­es is used for broad­band vibra­ti­on exci­ta­ti­on, main­ly in app­li­ca­ti­ons for non-dest­ruc­ti­ve tes­ting in com­bi­na­ti­on with She­aro­gra­phy and Ther­mo­gra­phy sys­tems. It is very com­pact and rigid as well as for quick set-up and easy hand­ling. The design is based on the estab­lis­hed Pie­zos­ha­ker type PS-X-03, but in con­trast to PS-X-03, our new seri­es uses com­pres­sed air for acti­ve coo­ling as well as for genera­ti­on of the vacu­um for the suc­tion cup. The acti­ve coo­ling allows lon­ger con­ti­nuous ope­ra­ti­on at hig­her power com­pa­red to the PS-X-03 ver­si­ons or a lon­ger life­time at hig­her power output.

Use as suc­tion-foot for tri­pod: Com­pa­red to the PS‑X seri­es, the incre­a­sed sealing dia­me­ter gene­ra­tes hig­her for­ces, which allows the usa­ge of the stan­dard suc­tion-foots for the isi-sys suc­tion tri­pods. For examp­le, two PS-AC‑X can be pla­ced left and right next to the field of view and the­re­fo­re clo­se to the area of interest.

 

App­li­ca­ti­ons: A mobi­le non­de­st­ruc­ti­ve tes­ting (NDT) sys­tem for fast detec­tion of impact dama­ge in fiber-rein­for­ced plastics (FRP)


PS-L-02-Series with mounting table and forced cooling

Piezoshaker_LS-MThe PS-L-02 Seri­es is desi­gned for vibra­ting small objects such as elec­tro­nic devices at high fre­quen­ci­es. The adap­ter table is exch­an­ge­ab­le and can be cus­to­mi­zed with threads for object moun­ting (M4). Moun­ting of load cell for for­ce mea­su­re­ment is optio­nal. The cen­ter of Mass of the object should be near the cen­ter. For con­ti­nuous ope­ra­ti­on at high loads and fre­quen­ci­es for­ced air coo­ling is requi­red. For this pur­po­se, a DC cen­tri­fu­gal fan, which can be con­nec­ted to the ampli­fier, is inclu­ded in the packa­ge. It is avail­ab­le with dif­fe­rent cha­rac­te­ris­tics (fre­quen­cy ran­ge, ampli­tu­des, and forces).

 


PS-M-LC-Series with screw mount and load cell adapter

Piezoshaker2The PS-M-LC-Seri­es is desi­gned for screwing or gluing on the object sur­face and can be com­bi­ned with load cells. The Pie­zos­ha­ker is avail­ab­le with actua­tor types for dif­fe­rent for­ce and fre­quen­cy ran­ges in com­bi­na­ti­on with varia­ti­on of the housing dia­me­ters defen­ding the coun­ter­weight mass of the shaker body. A sui­ta­ble and com­mon load cell is for examp­le the PCB model No. 201B02 (For­ce Sen­sor ICP® quartz for­ce ring), in which the maxi­mum Fre­quen­cy is 90kHz.


Piezoamplifier

NEW HPDA‑0–180 for High Dynamics Operation of Piezo Actuators

The HPDA‑0–180-1C Pie­zo­am­pli­fier is spe­cial­ly desi­gned to dri­ve isi-sys Pie­zos­ha­kers for a varie­ty of app­li­ca­ti­ons whe­re high power in com­bi­na­ti­on with low weight and com­pact size is a gre­at advan­ta­ge for mobi­li­ty and fle­xi­ble hand­ling, e.g. for mobi­le NDT app­li­ca­ti­ons. This sup­ports high­ly dyna­mic exci­ta­ti­on due to its wide band­width with fre­quen­ci­es up to 100 kHz. Large for­ces and acce­le­ra­ti­on have been gene­ra­ted in com­bi­na­ti­on with the dif­fe­rent isi-sys Pie­zos­ha­ker modu­les. The out­put power can be inspec­ted by the moni­to­ring sys­tem. The HPDA‑0–180 has over­tem­pe­ra­tu­re pro­tec­tion for the Pie­zos­ha­ker seri­es with a tem­pe­ra­tu­re sen­sor. Dif­fe­rent Ver­si­ons with mul­ti­ple chan­nels are available.

 

 

Exci­ta­ti­on power, for­ce, and acce­le­ra­ti­on of a Pie­zos­ha­ker sys­tem are func­tions of the fre­quen­cy, and its ampli­tu­de and thus also depend on the ampli­fier out­put, cha­rac­te­ri­zed by its trans­fer func­tion. You can request the trans­fer func­tion of the ampli­fier from isi-sys. The fre­quen­cy ran­ge for app­li­ca­ti­on of the Pie­zos­ha­ker is limi­ted depen­ding on its electri­cal capa­ci­ty. Adjus­t­ment of the exci­ta­ti­on power is usual­ly pos­si­ble via the ampli­tu­de and fre­quen­cy gene­ra­ted by the func­tion gene­ra­tor and can be moni­to­red via the vol­ta­ge and cur­rent moni­tor outputs.


Function generator / DAQ unit

Dif­fe­rent func­tion gene­ra­tors are sup­por­ted by the Soft­ware isi-Stu­dio. It offers to run the requi­red fea­tures for non-dest­ruc­ti­ve tes­ting such as auto­ma­tic fre­quen­cy sweeping. The stan­dard func­tion gene­ra­tor / DAQ unit also offers to mea­su­re the cur­rent and vol­ta­ge out­put of the ampli­fier. This per­mits moni­to­ring of the power app­lied to the surface.


Vacuum sources

The Pie­zos­ha­ker can be atta­ched by vacu­um to the object’s sur­face. When pres­su­ri­zed air is not avail­ab­le, isi-sys offers small vacu­um pump units. Two inde­pen­dent vacu­um sources are recom­men­ded when also a tri­pod with suc­tion cups is used. The vacu­um level is adjus­ta­ble via pump speed, which is recom­men­ded to pre­vent dama­ge to the object’s sur­face by vacu­um forces.

Piezoshaker-VakuumUnit


Application examples of the Piezoshaker system:

Dyna­mic Exci­ta­ti­on for Wel­ding Processes

Dyna­mic loading on a lar­ge yacht hull

Dyna­mic loading on a wind tur­bi­ne bla­de and resin bridges

Dyna­mic exci­ta­ti­on on a spacecraft

Dyna­mic loading on a yacht mast

Dyna­mic loading on rud­der blade

Should you need more detailed information or have special questions, please contact us per email — info@isi-sys.com.