Abstract: Described is a sensor for filling level measurement using a gravitational field analysis, comprising a first and a second gravimeter unit. The measurement is effected in a contactless manner, via the container wall and without input of energy into the filling good. Thus, there is no need for a source emitting measurement rays.

Abstract: Described is a sensor for filling level measurement using a gravitational field analysis, comprising a first and a second gravimeter unit. The measurement is effected in a contactless manner, via the container wall and without input of energy into the filling good. Thus, there is no need for a source emitting measurement rays.

Abstract: Described is a sensor for filling level measurement using a gravitational field analysis, comprising a first and a second gravimeter unit. The measurement is effected in a contactless manner, via the container wall and without input of energy into the filling good. Thus, there is no need for a source emitting measurement rays.

Abstract: A method for carrying out operating tests of vibration level switches for liquids or solid bulk material or mixtures thereof is provided, whereby a vibration resonator (1) of a level detection sensor is excited by an oscillation exciting feedback circuit to oscillate, whereby at least one excitation parameter of a plurality of signal processing blocks (5, 6, 7, 8, 9, 10) of the feedback circuit is varied, and the resulting oscillation change is compared by a microprocessor (14) to datasets comprising data of corresponding oscillation changes of a failure free system. Moreover, a vibration level switch for measuring the level in containers for carrying out the inventive method is provided.

Abstract: Described is a sensor for filling level measurement using a gravitational field analysis, comprising a first and a second gravimeter unit. The measurement is effected in a contactless manner, via the container wall and without input of energy into the filling good. Thus, there is no need for a source emitting measurement rays.

Abstract: A method for carrying out operating tests of vibration level switches for liquids or solid bulk material or mixtures thereof is provided, whereby a vibration resonator (1) of a level detection sensor is excited by an oscillation exciting feedback circuit to oscillate, whereby at least one excitation parameter of a plurality of signal processing blocks (5, 6, 7, 8, 9, 10) of the feedback circuit is varied, and the resulting oscillation change is compared by a microprocessor (14) to datasets comprising data of corresponding oscillation changes of a failure free system. Moreover, a vibration level switch for measuring the level in containers for carrying out the inventive method is provided.

Abstract: The invention relates to a filling level measuring device based on the principle of transit time measurement. An inventive filling level measuring device comprises an electronic unit (4) including a transmitting (9) and receiving means (10) for electromagnetic waves having a frequency of below 3 GHz, a process coupling means (5) connected to the electronic unit (4), which guides the transmitted signals onto the measurement distance, and guides back reflected signals to the electronic unit (4), and a high-frequency transformer (15, 16, 17, 18), to which the transmitting (9) and receiving means (10) and the process coupling means (5) are connected.

Abstract: The invention pertains to a level measuring by an apparatus has oscillating fork (1) that is excited to oscillate by an oscillator circuit that, for example, is realized in the form of a series circuit consisting of an input amplifier (2), a band filter (3) and an output amplifier (4). An identifying element (6) is assigned to the oscillating fork (1), with the identifying element transmitting the fundamental frequency of the oscillating fork (1) to the oscillator circuit (2, 3, 4) in coded form. In addition, the identifying element (6) transmits the fundamental frequency of the oscillating fork (1) to the control input of a frequency evaluation circuit (5), the input of which is connected to the output of the oscillator circuit (2, 3, 4). Consequently, the parameters of the band filter (3), as well as of the frequency evaluation circuit (5), are optimally adjusted to the fundamental frequency of the oscillating fork (1).

Abstract: A method for controlling a transducer device (7) featuring supply lines (17, 18) in a level sensor. The transducer device (7) is coupled to a fork resonator with fork tines and is used for both oscillation excitation and also for oscillation detection. For detection of a defective transducer device or an incorrectly connected connection of this transducer device (7), the capacitance value between the supply lines (17,18) or a variable proportional to this value is determined during the oscillation excitation and if there is deviation from a predetermined desired value by a predetermined amount, a fault signal is generated.

Abstract: An oscillating element, particularly for a level sensor, comprises an oscillating diaphragm (3), a stack of piezoelectric elements (6, 7), and a tie bolt (4) connected to the diaphragm (3) for pressing the piezoelectric elements (6, 7) against the diaphragm (3). The tie bolt (4) forms a single piece with the diaphragm (3).

Abstract: The invention relates to a filling level measuring device based on the principle of transit time measurement. An inventive filling level measuring device comprises an electronic unit (4) including a transmitting (9) and receiving means (10) for electromagnetic waves having a frequency of below 3 GHz, a process coupling means (5) connected to the electronic unit (4), which guides the transmitted signals onto the measurement distance, and guides back reflected signals to the electronic unit (4), and a high-frequency transformer (15, 16, 17, 18), to which the transmitting (9) and receiving means (10) and the process coupling means (5) are connected.

Abstract: The invention pertains to a method for controlling a transducer device (7) featuring supply lines (17, 18) in a level sensor. The transducer device (7) is coupled to a fork resonator with fork tines and is used for both oscillation excitation and also for oscillation detection. For detection of a defective transducer device or an incorrectly connected connection of this transducer device (7), the capacitance value between the supply lines (17, 18) or a variable proportional to this value is determined during the oscillation excitation and if there is deviation from a predetermined desired value by a predetermined amount, a fault signal is generated.

Abstract: A method for controlling piezoelectric drives in filling level measuring devices, in the case of which a piezoelectric device (7) is coupled to a fork resonator, and this piezoelectric device (7) is used to excite and detect vibrations. The excitation signal (B) is an at least approximately trapezoidal signal, as a result of which the generation of undesired harmonic resonances in the fork resonator can be effectively avoided. The excitation signal preferably comprises two phases with approximately constant maximum and minimum levels, respectively, which are interrupted in each case by a phase of defined period and defined limited rate of signal change.

Abstract: A method for controlling piezoelectric drives in filling level measuring devices, in the case of which a piezoelectric device (7) is coupled to a fork resonator, and this piezoelectric device (7) is used to excite and detect vibrations. The excitation signal (B) is an at least approximately trapezoidal signal, as a result of which the generation of undesired harmonic resonances in the fork resonator can be effectively avoided. The excitation signal preferably comprises two phases with approximately constant maximum and minimum levels, respectively, which are interrupted in each case by a phase of defined period and defined limited rate of signal change.

Abstract: The invention pertains to level measuring by means of an oscillating fork (1) that is excited to oscillate by an oscillator circuit that, for example, is realized in the form of a series circuit consisting of an input amplifier (2), a band filter (3) and an output amplifier (4). An identifying element (6) is assigned to the oscillating fork (1), with the identifying element transmitting the fundamental frequency of the oscillating fork (1) to the oscillator circuit (2, 3, 4) in coded form. In addition, the identifying element (6) transmits the fundamental frequency of the oscillating fork (1) to the control input of a frequency evaluation circuit (5), the input of which is connected to the output of the oscillator circuit (2, 3, 4). Consequently, the parameters of the band filter (3), as well as of the frequency evaluation circuit (5), are optimally adjusted to the fundamental frequency of the oscillating fork (1).

Abstract: A method for controlling piezoelectric drives in filling level measuring devices, in the case of which a piezoelectric device (7) is coupled to a fork resonator, and this piezoelectric device (7) is used to excite and detect vibrations. The excitation signal (B) is an at least approximately trapezoidal signal, as a result of which the generation of undesired harmonic resonances in the fork resonator can be effectively avoided. The excitation signal preferably comprises two phases with approximately constant maximum and minimum levels, respectively, which are interrupted in each case by a phase of defined period and defined limited rate of signal change.

Abstract: An oscillating element, particularly for a level sensor, comprises an oscillating diaphragm (3), a stack of piezoelectric elements (6, 7), and a tie bolt (4) connected to the diaphragm (3) for pressing the piezoelectric elements (6, 7) against the diaphragm (3). The tie bolt (4) forms a single piece with the diaphragm (3).

Abstract: A method for rectifying a sensor current with a synchronous demodulator, wherein the rectifying factor of the synchronous demodulator can be controlled. A control clock pulse signal of the synchronous demodulator is toggled between at least two different states, with the states corresponding to different rectifying factors. The resulting total rectifying factor of the synchronous demodulator can be selected at will by adjusting the pulse duty factor between the at least two states.