14-09-2017 дата публикации
Номер: US20170263843A1
Принадлежит:
A piezoelectric positioning device () has at least one piezoelectric actuator () having a first connection contact () and a second connection contact (). A control device () with digital/analog converters () connected to the connection contacts () is used to control the at least one piezoelectric actuator (). In comparison with a coarse converter (), a fine converter () has a comparatively smaller voltage range and lower voltage levels, with the result that a high degree of positioning accuracy can be achieved. 1. A piezoelectric positioning device comprising:at least one piezoelectric actuator comprising, respectively, a first connection contact and a second connection contact, [{'sub': 1', '1', '1, 'a first digital/analog converter connected to the first connection contact and providing a first analog converter output voltage Uin a first voltage range ΔUin first voltage levels Δu,'}, {'sub': 2', '2', '2, 'claim-text': {'br': None, 'sub': 1', '2', '1', '2, 'where: ΔU>ΔU≧Δu>Δu.'}, 'a second digital/analog converter connected to the second connection contact and providing a second analog converter output voltage Uin a second voltage range ΔUin second voltage levels Δu,'}], 'a control device configured to control the at least one piezoelectric actuator, and comprising2. The positioning device as claimed in claim 1 , wherein the first voltage levels Δuhave a maximum voltage inaccuracy Δu claim 1 , where: ΔU≧Δu+Δuand/or ΔU≦64·Δu.3. The positioning device as claimed in further comprising a first voltage amplifier arranged downstream of the first digital/analog converter and a second voltage amplifier is arranged downstream of the second digital/analog converter.4. The positioning device as claimed in claim 1 , further comprising a non-reactive resistor connected between the second digital/analog converter and the second connection contact.5. The positioning device as claimed in claim 3 , further comprising a low-pass filter connected between the first digital/analog ...
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