摘要:
A rotary ultrasonic piezoelectric motor is provided and a method of exciting a flexure traveling wave to drive the motor. The motor includes a stator having a piezoelectric ceramic disc polarized in the radial direction and bounded by a top electrode and a segmented bottom electrode. The motor also includes a power source for applying two pairs of alternating voltages to the bottom electrode segments to excite a shear-shear mode vibration in the stator, resulting in a shear-shear mode flexure traveling wave in the stator. The motor further includes a rotor operatively connected to the stator, and the stator is driven to rotate through a frictional force between the rotor and the stator due to the traveling wave deformation of the stator. A linear ultrasonic piezoelectric motor and method of exciting a flexure traveling wave to linearly drive the motor is provided. The motor includes a stator having a rectangular piezoelectric ceramic plate that is polarized in the longitudinal direction. The motor also includes a power source for applying two pairs of alternating voltages to the bottom electrode segments to excite a shear-shear mode vibration in the stator, resulting in a shear-shear mode flexure traveling wave in the stator. The motor further includes a slider operatively connected to the stator, and the stator is driven to move linearly through a frictional force between the slider and the stator due to the traveling wave deformation of the stator.
摘要:
A rotary ultrasonic piezoelectric motor is provided and a method of exciting a flexure traveling wave to drive the motor. The motor includes a stator having a piezoelectric ceramic disc polarized in the radial direction and bounded by a top electrode and a segmented bottom electrode. The motor also includes a power source for applying two pairs of alternating voltages to the bottom electrode segments to excite a shear-shear mode vibration in the stator, resulting in a shear-shear mode flexure traveling wave in the stator. The motor further includes a rotor operatively connected to the stator, and the stator is driven to rotate through a frictional force between the rotor and the stator due to the traveling wave deformation of the stator. A linear ultrasonic piezoelectric motor and method of exciting a flexure traveling wave to linearly drive the motor is provided. The motor includes a stator having a rectangular piezoelectric ceramic plate that is polarized in the longitudinal direction. The motor also includes a power source for applying two pairs of alternating voltages to the bottom electrode segments to excite a shear-shear mode vibration in the stator, resulting in a shear-shear mode flexure traveling wave in the stator. The motor further includes a slider operatively connected to the stator, and the stator is driven to move linearly through a frictional force between the slider and the stator due to the traveling wave deformation of the stator.
摘要:
A tool and kit for cleaning and/or cleaning validation which includes a handle, a tip, and an ejection mechanism connected to the handle that is capable of ejecting a cleaning element (such as a swab, brush, or applicator) from the handle without the need for a user to handle the cleaning element. The cleaning element is seated on the tip and can be ejected from the handle either with or without the tip on which it is seated.
摘要:
An apparatus for generating a number of loudspeaker signals for a loudspeaker array defining a reproduction space includes a prestage configured to generate a plurality of output audio signals while using one or more audio signals associated with one or more virtual positions, each output audio signal being associated to a loudspeaker position such that the plurality of output audio signals together replicate a reproduction of the input audio signal(s) at the virtual position(s), and a number of output audio signals being smaller than a number of loudspeaker signals. The apparatus further includes a main stage configured to obtain the plurality of output audio signals and further to obtain, as a virtual position for each output audio signal, the loudspeaker positions, and to generate the number of loudspeaker signals for the loudspeaker array such that the loudspeaker positions are replicated as a virtual sources by the loudspeaker array.
摘要:
The invention relates to an ultrasound probe arrangement (14, 16) for coupling ultrasonic signals toward a component (12), which is to be inspected, by using the water open jet method, with a probe (24; 124), which is placed inside a jet nozzle (26; 126) and having a multitude of ultrasonic transmitting and/or receiving elements (25; 125) and at least one liquid inlet (28; 128) as well as at least one liquid outlet (30; 130). In order to improve the flow of water inside the jet nozzle, the invention provides that: one or more preliminary or filter chambers (FK1, FK2, FK3) are situated upstream from a flow space (36, 136); each preliminary or filter chamber (FK1, FK2, FK3) comprises a dividing wall (TW1, TW2, TW3) having flow channels (SK1, SK2, SK3) running perpendicular to the direction of flow; the number of flow channels (SK1, SK2, SK3) in each dividing wall (TW1, TW2, TW3) increases in the direction of flow, and; the diameter of the flow channels (SK1, SK2, SK3) in each dividing wall (TW1, TW2, TW3) decreases in the direction of flow.
摘要:
The invention relates to an ultrasound probe arrangement (14, 16) for coupling ultrasonic signals toward a component (12), which is to be inspected, by using the water open jet method, with a probe (24; 124), which is placed inside a jet nozzle (26; 126) and having a multitude of ultrasonic transmitting and/or receiving elements (25; 125) and at least one liquid inlet (28; 128) as well as at least one liquid outlet (30; 130). In order to improve the flow of water inside the jet nozzle, the invention provides that: one or more preliminary or filter chambers (FK1, FK2, FK3) are situated upstream from a flow space (36, 136); each preliminary or filter chamber (FK1, FK2, FK3) comprises a dividing wall (TW1, TW2, TW3) having flow channels (SK1, SK2, SK3) running perpendicular to the direction of flow; the number of flow channels (SK1, SK2, SK3) in each dividing wall (TW1, TW2, TW3) increases in the direction of flow, and; the diameter of the flow channels (SK1, SK2, SK3) in each dividing wall (TW1, TW2, TW3) decreases in the direction of flow.
摘要:
A tissue-specific, suitably liver specific vector for gene therapy of a diseased host, wherein a therapeutic gene is coupled to a promoter chemically, enzymatically, or over an antibody, packaged in a polypeptide coat, and coupled to a component of a preselected virus of the tissue to be treated, and when the tissue is liver tissue, then the virus is hepatitis B virus.
摘要:
A costume may include a flexible garment and a flexure mechanism that is actuatable to expand the form of the garment, such as when a muscle is flexed. The flexible garment may be configured to cover at least a portion of a limb of a humanoid figure, such as a person or doll. The flexure mechanism may be covered by and extend along a portion of the garment. In some examples, a first end of the flexure mechanism may be fixed in position relative to the garment, and a second end moveable relative to the garment and relative to the first end. The flexure mechanism may include an intermediate portion between the first and second ends, with the flexure mechanism being configured to move the intermediate portion laterally toward or away from an articulating member of the limb by movement of the second end of the flexure mechanism.
摘要:
A costume may include a flexible garment and a flexure mechanism that is actuatable to expand the form of the garment, such as when a muscle is flexed. The flexible garment may be configured to cover at least a portion of a limb of a humanoid figure, such as a person or doll. The flexure mechanism may be covered by and extend along a portion of the garment. In some examples, a first end of the flexure mechanism may be fixed in position relative to the garment, and a second end moveable relative to the garment and relative to the first end. The flexure mechanism may include an intermediate portion between the first and second ends, with the flexure mechanism being configured to move the intermediate portion laterally toward or away from an articulating member of the limb by movement of the second end of the flexure mechanism.
摘要:
A toy having an internal gyroscopic element is disclosed, including ways of using the toy. A toy having a gyroscopic element is intended to provide an entertaining play experience by providing resistance to movement of the toy when it is used in, for example, a role playing situation. Movement of the gyroscopic element may manually be initiated by a person playing with the toy, and the duration and degree of movement of the gyroscopic element may be limited by natural forces.