Abstract: An actuator assembly is disclosed, which includes a power unit, an actuator powered by the power unit, the power unit being configured to provide a work motion of the actuator, a motion sensor, a timing unit for measuring an immobility time of the actuator, a safety unit for selectively placing the actuator assembly into an operational state and a safety state in which the work motion of the actuator can be prevented, the safety unit being configured to prevent the operational state of the actuator assembly in case the immobility time of the actuator exceeds a predetermined process safety time. The actuator assembly can include an activation unit configured to control the power unit to provide an activation motion of the actuator in case the immobility time exceeds a predetermined activation time.

Abstract: An actuator assembly is disclosed, which includes a power unit, an actuator powered by the power unit, the power unit being configured to provide a work motion of the actuator, a motion sensor, a timing unit for measuring an immobility time of the actuator, a safety unit for selectively placing the actuator assembly into an operational state and a safety state in which the work motion of the actuator can be prevented, the safety unit being configured to prevent the operational state of the actuator assembly in case the immobility time of the actuator exceeds a predetermined process safety time. The actuator assembly can include an activation unit configured to control the power unit to provide an activation motion of the actuator in case the immobility time exceeds a predetermined activation time.

Abstract: An antenna system and method for measuring azimuth and elevation angles of an active, signal sending radiosonde. The system includes a first passive antenna group having at least two antenna arrays, the direction pattern of which is wide at least in elevation plane for measuring azimuth angle based on the phase differences between the antenna arrays, a second passive antenna group having at least two antenna arrays, the direction pattern of which is wide at least in elevation plane for measuring the elevation angle based on the phase differences between the antenna arrays and the rotational position of the antenna field, and at least one third antenna having high gain for receiving the telemetry signal, the direction pattern of which element is narrow in azimuth plane and wide in elevation plane. The first and second antenna groups form a solid antenna field which is fixedly tilted in a predetermined elevation position.

Abstract: This publication discloses a radiosonde system, a radiosonde system receiver and a signal processing method for use in a radiosonde system. The radiosonde system comprises at least one radiosonde (1) with means for acquisition of position and/or weather data and means for downstream transmission of the data over a radio-frequency path, signal capture means (2, 3) for reception of the weather and/or position data, and receiver means (4) for processing the received signals, the receiver means including RF circuit elements (11) for downconversion of the received signal frequency to a lower frequency known as the first intermediate frequency. According to the invention, the receiver means (4) include sampling means (12) performing sampling at the intermediate frequency, at least two digital mixer means (13) for selective filtration of desired frequency bands from the sampled signal, and processor means (14) for parallel signal processing at the desired frequency bands.

Abstract: The invention relates to a controller of a frequency converter. In order to avoid compatibility problems the controller of the frequency converter comprises a memory, in which control programs of peripheral devices connectable to the controller are stored; and a compatibility table; a check element, which by utilizing the memory checks specifically for each peripheral device whether a compatible control program is stored in a memory of the peripheral device; and an update element, which, if need, be retrieves the control program of the peripheral device from the memory of the controller and sends it to the peripheral device to be used if the control program stored in the memory is, on the basis of the hardware identifier and the compatibility table, compatible.

Abstract: The present invention relates to an antenna system and method. The antenna system for measuring azimuth and elevation angles of an active, signal sending radiosonde (31), comprises a first passive antenna group (13) comprising at least two antenna arrays (11a, 11b), the direction pattern of which is wide at least in elevation plane for measuring azimuth angle of the radiosonde (31) based on the phase differences between the antenna arrays (11a, 11b), a second passive antenna group (12) comprising at least two antenna arrays (10a, 10b), the direction pattern of which is wide at least in elevation plane for measuring the elevation angle of the radiosonde (31) based on the phase differences between the antenna arrays (10a, 10b) and the rotational position of the antenna field (1), and at least one third antenna (8) having high gain for receiving the telemetry signal, the direction pattern of which element (8) is narrow in azimuth plane and wide in elevation plane.

Abstract: This publication discloses a radiosonde system, a radiosonde system receiver and a signal processing method for use in a radiosonde system. The radiosonde system comprises at least one radiosonde (1) with means for acquisition of position and/or weather data and means for downstream transmission of the data over a radio-frequency path, signal capture means (2, 3) for reception of the weather and/or position data, and receiver means (4) for processing the received signals, the receiver means including RF circuit elements (11) for downconversion of the received signal frequency to a lower frequency known as the first intermediate frequency. According to the invention, the receiver means (4) include sampling means (12) performing sampling at the intermediate frequency, at least two digital mixer means (13) for selective filtration of desired frequency bands from the sampled signal, and processor means (14) for parallel signal processing at the desired frequency bands.