The disclosure relates to a coating device, in particular a rotary atomizer, for coating components, in particular motor vehicle body components, with an electrostatic coating agent charging system, so that the coating device comprises a high-voltage area and an electrically grounded area. Furthermore, the coating device comprises a sensor in the high-voltage area, in particular as a rotational speed sensor for measuring the rotational speed of the rotary atomizer, and an optical waveguide for transmitting a measurement signal of the sensor from the high-voltage area to the electrically grounded area, wherein the optical waveguide enables a potential separation between the high-voltage area and the electrically grounded area. The disclosure provides that the sensor is a magnetic sensor.

The invention relates to a counting sensor for counting the number of rotations or of linear displacements of an object, wherein the counting sensor comprises: one single Wiegand module; at least one sensor element; a processing electronic circuit, which is connected to the sensor element; and a permanent magnet arrangement, which is movable relatively to the Wiegand module; wherein the processing electronic circuit is configured to obtain direction information, whether the permanent magnet arrangement moves in said one direction or in an opposite direction, and (ii) to obtain magnetic pole information; and a data storage for storing a value, which indicates the number of the rotations or of the linear displacements; wherein: the processing electronic circuit is configured (i) to determine, on the basis of the direction information and the magnetic pole information, the number of the rotations or of the linear displacements of the object and to store the corresponding value in the data storage, (ii) to perform, on the basis of a sequence of the direction informations and of the magnetic pole informations, an error detection to the effect whether one of the rotations or one of the linear displacements of the object has not been recognized partially or completely, and (iii) to determine an according correction and to correct the value upon detection of an error.

Provided are a power generation element, an encoder, a method of manufacturing a magnetic member, and a signal acquisition method capable of reducing variations in generated power. Power generation element includes: magnetic member that produces a large Barkhausen effect by a change in an external magnetic field; and coil wound around magnetic member. Magnetic member includes first magnetic sensing part and second magnetic sensing part having softer magnetism than first magnetic sensing part. First magnetic sensing part is magnetized in a winding axis direction of coil, and a magnetization direction does not change due to a change in a direction of the external magnetic field.

A position sensor is disclosed for determining the number of repeating courses of movement of an object and of the precise position of the object in relation to a reference position. The position sensor is disclosed to include a Wiegand module, which is composed of a Wiegand wire having a coil that surrounds the Wiegand wire; a magnetic temporary storage, which is in addition to the Wiegand module; a first sensor element and a second sensor element; a processing electronic circuit, which is configured to evaluate or to determine an output signal that is output by the sensor elements and an information that is stored in the magnetic temporary storage; and a permanent magnet arrangement, which is movable relatively to the Wiegand module in one direction as well as in a direction that is opposite to said one direction.

A position detector is disclosed that is capable of operating in an autonomous mode or non-autonomous mode. As an example, in the autonomous mode, the position detector is not supplied with external energy, but rather receives energy from a Wiegand module thereby enabling the position detector to obtain information about movement of an object.

A rotation detecting device includes a plurality of magnetic field generating portions; a magnetic member; a coil wound around the magnetic member; and a magnetic field introducing portion. The magnetic field introducing portion introduces a magnetic flux generated by the magnetic field generating portion to pass through the magnetic member when the magnetic field generating portion passes through a specific location.

An encoder device including: a position detection unit for detecting position information of a moving part; a magnet having a plurality of polarities along a moving direction of the moving part; an electric signal generation unit for generating an electric signal, based on a magnetic characteristic of a magnetosensitive part, the electric signal generation unit having the magnetosensitive part whose magnetic characteristic is changed by a change in magnetic field associated with movement of the moving part and a first magnetic body for guiding magnetic flux lines of the magnet toward the magnetosensitive part; and a second magnetic body for guiding magnetic flux lines of a part having one polarity of the magnet toward a part having other polarity of the magnet, the second magnetic body being disposed between the magnet and the magnetosensitive part.

Provided are a power generation element, an encoder, and a method of manufacturing a magnetic member capable of increasing generated power. Power generation element includes magnetic member that produces a large Barkhausen effect, coil wound around magnetic member, and ferrite member provided at an end of magnetic member to be aligned with coil along a winding axis direction of coil. Ferrite member includes main body located inside columnar space and protrusion connected to main body and located outside columnar space. Columnar space is surrounded by a virtual plane when it is assumed that an outer edge of coil when viewed from the winding axis direction of coil is extended to both sides of the coil in the winding axis direction of coil, and is sandwiched between two virtual planes that are in contact with both ends of magnetic member in the winding axis direction of coil and are orthogonal to the winding axis direction.

Provided is a rotation detector capable of suppressing the occurrence of erroneous detection. Rotation detector includes magnet that rotates together with a rotary shaft, a plurality of power generation elements that generate power according to a change in a magnetic field due to rotation of magnet together with the rotary shaft, and a plurality of magnetic sensors provided to a corresponding one of the plurality of power generation elements. Rotation detector further includes information processor that determines a rotational position of the rotary shaft by using the plurality of magnetic sensors, and generated power supply unit that supplies the power generated by each of the plurality of power generation elements only to the corresponding one of the plurality of power generation elements.

An encoder device including: a position detection unit for detecting position information of a moving part; a magnet having a plurality of polarities along a moving direction of the moving part; an electric signal generation unit for generating an electric signal, based on a magnetic characteristic of a magnetosensitive part, the electric signal generation unit having the magnetosensitive part whose magnetic characteristic is changed by a change in magnetic field associated with movement of the moving part and a first magnetic body for guiding magnetic flux lines of the magnet toward the magnetosensitive part; and a second magnetic body for guiding magnetic flux lines of a part having one polarity of the magnet toward a part having other polarity of the magnet, the second magnetic body being disposed between the magnet and the magnetosensitive part.