Abstract: A method and an apparatus are disclosed for monitoring the state of a roller bearing. The apparatus includes a vibration sensor, configured to detect vibrations which occur during operation of the bearing, and to generate a first signal as a function of the detected vibrations. A diagnosis electronics system is configured to output an item of information about a state of the bearing on the basis of the first signal and at least one limit value stored in the diagnosis electronics system. A sound emission sensor is provided, configured to pick up noises, produced in the event of plastic deformation of the bearing at least in regions. A second signal is then transmitted to the diagnosis electronics system, taking into account the picked-up noises.

Abstract: The operational state of a slide bearing is monitored by determining measurement values that characterize noise emissions in the slide bearing using a sensor element which is mechanically coupled to the slide bearing. A characteristic value is calculated from determined measurement values and the operational state of the slide bearing is classified according to the characteristic value.

Abstract: In a method for determining and/or monitoring the state of a roller bearing wherein during the operation of the roller bearing a sensor signal in the form of a sound emission signal is detected in a frequency band in the ultrasonic range, according to an embodiment of the invention shock pulses in the sensor signal are determined. As a result, electrical bearing currents in the roller bearing can be detected and damage to the bearing can therefore be avoided early.

Abstract: A method and an apparatus are disclosed for monitoring the state of a roller bearing. The apparatus includes a vibration sensor, configured to detect vibrations which occur during operation of the bearing, and to generate a first signal as a function of the detected vibrations. A diagnosis electronics system is configured to output an item of information about a state of the bearing on the basis of the first signal and at least one limit value stored in the diagnosis electronics system. A sound emission sensor is provided, configured to pick up noises, produced in the event of plastic deformation of the bearing at least in regions. A second signal is then transmitted to the diagnosis electronics system, taking into account the picked-up noises.

Abstract: An arrangement and method for determining and monitoring the state of a rolling bearing, wherein a first sensor signal is captured in the form of a sound emission signal in a first frequency band in the ultrasonic range during operation of the rolling bearing, a second sensor signal is captured in a second frequency band of lower frequency in the ultrasonic range, a first characteristic value for recently occurred damage is determined from the shape of the first sensor signal, a second characteristic value for recently occurred damage is determined from the shape of the second sensor signal, and the state of the rolling bearing is determined by comparing the first characteristic value to a reference value dependent on the speed of the rolling bearing and dependent on the second characteristic value to at least one second reference value dependent on the speed of the rolling bearing.

Abstract: The invention relates to a method for filtering measurement signals by way of wavelet filtering, wherein the signals are first transferred to the wavelet domain by way of a wavelet transform, are subjected to threshold analysis, and the threshold values can then be varied in the wavelet domain commensurate with the respective measurement situation. The measurement signals are filtered by a plurality of filters arranged in segmentation levels and a statistical parameter is calculated based on an adjustable number of already calculated wavelet coefficients of a segmentation level and is then multiplied with a value that can be adjusted.

Abstract: An arrangement and method for determining and monitoring the state of a rolling bearing, wherein a first sensor signal is captured in the form of a sound emission signal in a first frequency band in the ultrasonic range during operation of the rolling bearing, a second sensor signal is captured in a second frequency band of lower frequency in the ultrasonic range, a first characteristic value for recently occurred damage is determined from the shape of the first sensor signal, a second characteristic value for recently occurred damage is determined from the shape of the second sensor signal, and the state of the rolling bearing is determined by comparing the first characteristic value to a reference value dependent on the speed of the rolling bearing and dependent on the second characteristic value to at least one second reference value dependent on the speed of the rolling bearing.

Abstract: Network elements in telecommunications networks are managed via an operating system which is connected to the network elements. The operating system is formed from a large number of manager applications which communicate with the network elements. In the course of such communication, it is possible to provide for the authentication of a manager application to be checked by means of a network element. According to the invention, this authentication check is carried out centrally in the network element for various communication protocols, with access being made to a central authentication databank 10.

Abstract: Network elements in telecommunications networks are managed via an operating system which is connected to the network elements. The operating system is formed from a large number of manager applications which communicate with the network elements. In the course of such communication, it is possible to provide for the authentication of a manager application to be checked by means of a network element. According to the invention, this authentication check is carried out centrally in the network element for various communication protocols, with access being made to a central authentication databank 10.

Abstract: A system for the automatic signal recording and for evaluation of the decay behavior of a test object following a mechanical impulse excitation. The system includes a coupling element (3) coupled to sensors (2, 13), which detect oscillations of the test object (24) and which convert the detected oscillations to analog oscillatory impulses. The system is further provided with an amplifier (5) adapting the amplitude of the analog oscillatory impulses, a low-pass filter (6) provided for avoiding aliasing effects, an analog to digital converter (7) converting the analog oscillatory impulses to digital data and an arithmetic unit (8) for oscillation analysis and evaluation of the data. The coupling element (3), the amplifier (5), the low-pass filter (6), the analog to digital converter (7) and the arithmetic unit (8) are combined in a compact mobile unit (1) and are connected in series to one another.

Abstract: The invention is directed to a system and a method for the configuration and/or parameterization of diagnostic devices for test objects. The system includes a first data object having a collection of technological test object parameters of the test object and its components, and a second data object having a collection of technological parameters of hardware components of the diagnostic device. The system further includes a first program object containing data sentences for the assignment of at least test object parameters and technological parameters of hardware components, and a second program object for processing the data sentences assigned in the first program object. Via the data and program objects, a knowledge base is created that results in a configuration mainly automatically controlled by the knowledge of the system and/or parameterization of the diagnostic device including the test structure and evaluation. In this manner, the cost of such preparations is significantly reduced.

Abstract: An arrangement for a temperature-compensated multi-dimensional micropositioning of mutually position-defined optical components including a guide unit for housing the optical components and a plurality of piezo actors. The guide unit includes two spaced plates or rings. Also included is three equally spaced solid joints arranged or integrated between the rings or plates, and stack-type piezo actors secured in a neighbouring relationship with the solid joints in such a manner that actuation forces act on the rings or plates. Further, at least the surfaces of the rings or plates accommodating the optical components are coated with a material corresponding to that of the optical components, the guide unit and the optical components are made from materials with essentially the same temperature coefficients, and one stack-type piezo actor is arranged between two solid joints.

Abstract: The invention relates to an arrangement for the temperature-compensated multi-dimensional micropositioning of mutually position-defined optical components, comprising a guide unit for housing the optical components as well as several piezo actors.

Abstract: Analog test signals may be picked up from the test object with vibration sensors. A computer is equipped with a standard interface card which is connected by an interface, preferably parallel interface, and serves to digitize the test signals. A switching means serves to generate a trigger signal which can be input over a preferably serial interface. An executive routine in the computer switches the input of test signals on and off via the trigger signal.

Abstract: A device for predictively diagnosing the prevailing quality of the technical work result of a technical installation, in particular, the prevailing quality of the welding spots of a welding robot. The device includes a device for cyclically acquiring sets of measured values, whose values influence the desired quality of the work result of the system ,an installation model which uses sets of measured values of the installation to simulate an actual value for the prevailing quality of the work result of the installation, and a device at least for parameterizing the installation model. The parameterizing device includes a data base for storing selected sets of measured values and associated characteristic values, which are a measure for the quality of the work result of the installation, and the device generating and/or optimizing at least the parameters of the installation model by successively evaluating the sets of measured values and the associated characteristic quality values by an iterative optimization.