A galvanometer drive particularly useful for a deflection unit includes a rotor that is rotatable about a rotational axis, the rotor formed in at least one section by a permanent magnet. A stator surrounds the permanent magnet, the stator including a coil. The permanent magnet includes at least two magnetic layers and at least one electrically insulating intermediate layer arranged between the two magnetic layers. A method for manufacturing the rotor for the galvanometer is also provided.

Disclosed is a stator structure for a galvanometer motor. The stator structure includes a frame and a single electromagnetic coil, wherein a first through hole configured to allow a rotor assembly to run through is molded on the frame, a support portion disposed on a side of the first through hole and extending along an axial direction perpendicular to the first through hole; wherein the electromagnetic coil is wound on the support portion, a protrusive restraining block is molded on both sides of an outer wall of the support portion on the frame, wherein a distance between the support portion and either of the two restraining blocks is a maximum width for winding the electromagnetic coil.

Disclosed is a stator structure for a galvanometer motor. The stator structure includes a frame and a single electromagnetic coil, wherein a first through hole configured to allow a rotor assembly to run through is molded on the frame, a support portion disposed on a side of the first through hole and extending along an axial direction perpendicular to the first through hole; wherein the electromagnetic coil is wound on the support portion, a protrusive restraining block is molded on both sides of an outer wall of the support portion on the frame, wherein a distance between the support portion and either of the two restraining blocks is a maximum width for winding the electromagnetic coil.

Provided is a current sensor having variable tuning precision capability depending on an amount of a current to be measured, a system state and the like. In the present disclosure, the current measurement apparatus having variable tuning precision capability does not separately require a current sensor measuring a small current with high precision and a current sensor stably measuring a large current without saturation. In the present disclosure, a single current measurement apparatus may vary current measurement precision depending on a current magnitude and the like, and may thus measure the small current with the high precision and stably measure the large current without saturation.

Provided is a current sensor having variable tuning precision capability depending on an amount of a current to be measured, a system state and the like. In the present disclosure, the current measurement apparatus having variable tuning precision capability does not separately require a current sensor measuring a small current with high precision and a current sensor stably measuring a large current without saturation. In the present disclosure, a single current measurement apparatus may vary current measurement precision depending on a current magnitude and the like, and may thus measure the small current with the high precision and stably measure the large current without saturation.

The invention relates to a field device of measurement- and automation technology, comprising: a measuring transducer which is adapted to register at least one measured variable and, at any one time, to output at least a first measured value representing the measured variable; a display unit which is adapted to display measuring- and/or operating parameters; and an electronic measuring/operating circuit which is adapted to operate the measuring transducer and/or the display unit, as well as to calculate from the first measured value a derived, second measured value. The display unit has a screen that has a first region with a first display technology and a second region with a second display technology. The first region is embodied reflectively or transreflectively and the second region is embodied transmissively.

Provided is a current sensor having variable tuning precision capability depending on an amount of a current to be measured, a system state and the like. In the present disclosure, the current measurement apparatus having variable tuning precision capability does not separately require a current sensor measuring a small current with high precision and a current sensor stably measuring a large current without saturation. In the present disclosure, a single current measurement apparatus may vary current measurement precision depending on a current magnitude and the like, and may thus measure the small current with the high precision and stably measure the large current without saturation.

Provided is a current sensor having variable tuning precision capability depending on an amount of a current to be measured, a system state and the like. In the present disclosure, the current measurement apparatus having variable tuning precision capability does not separately require a current sensor measuring a small current with high precision and a current sensor stably measuring a large current without saturation. In the present disclosure, a single current measurement apparatus may vary current measurement precision depending on a current magnitude and the like, and may thus measure the small current with the high precision and stably measure the large current without saturation.

The invention relates to a galvanometer drive comprising a rotor (3) which is rotatable about a rotational axis (2) and is formed, at least in one section, by a permanent magnet (4), and a stator (5) which surrounds the permanent magnet (4) and includes a coil. According to the invention, the permanent magnet (4) comprises at least two magnetic layers (10) and at least one electrically insulating intermediate layer (11) arranged between the two magnetic layers (10). Moreover, the invention relates to a manufacturing method for a rotor (3) of a galvanometer drive (1), which is designed as a permanent magnet (4). According to the invention, multiple magnetic layers (10) are connected to one another in an integrally joined manner to form a blank and/or the outer contour of the blank is subsequently reworked, in particular mechanically, in order to form the rotor. The invention also relates to a deflection unit for deflecting a laser beam, comprising an optical deflection element, in particular a mirror, and comprising a galvanometer drive (1) connected to the optical deflection element, with the aid of which the deflection element is bidirectionally rotatable through a limited rotation range.

A determining method for determining whether or not the tension of an adhesive tape constituting a frame unit is proper, in which a plate-shaped workpiece and an annular frame are attached to the adhesive tape to form the frame unit, is provided. The adhesive tape is composed of a base layer and an adhesive layer formed on the base layer. The determining method includes a supporting step, a downward amount measuring step, and a determining step.