Carl Schenck Ag

Schenck Rotec Corporation

Schenck Auto-service-gerate Gmbh

Volker Guyot

Martin Mueller

Otfrid Maus

Paul Holdinghausen

Volker Tews

Peter Gnielka

Martin Muller

A process masks non-relevant measured values in an unbalance signal consisting of a large number of individual measured values and a circuit arrangement determines the unbalance of a rotatable object in at least one measuring plane with at least one oscillation transducer and one angle position pick-up for processing the unbalance measuring signal. A display device displays the unbalance in terms of position and magnitude and/or a processing device further processes the unbalance, in order for a system based on fuzzy logic to take into account any unexpected interferences during the formation of the unbalance measured value. In the case of greatly deviating individual measured values, a system based on fuzzy logic which recognizes the course of the unbalance measuring signal that can be roughly expected masks these values as non-relevant.

Process for mask irrelevant measured values in an unbalance measuring

A method and apparatus is provided for determining the unbalance of the wheels of a motor vehicle under test by means of unbalance measuring equipment. Such equipment is operated with a d.c. voltage supply in the form of the battery of the vehicle under test which functions as the sole source of that supply. The driven wheels of the vehicle under test are accelarated by the vehicle engine until a constant wheel speed is obtained within a given range. The unbalance values of the driven wheels at constant wheel speed are determined and appropriate correction is made. Wheel driving structure may also be provided for rotating the non-driven wheels of the vehicle under test to determine the unbalance of these wheels. The wheel driving structure for rotating the non-driven wheels is also powered by a d.c. voltage source in the form of the vehicle battery.

Process for the determination of unbalance

An unbalance measuring procedure and circuitry therefor employs correction weights for the compensation of unbalance of a rotating component under test. After a measuring run, stored and displayed unbalance information is compensated by a compensating weight at the angular position displayed and a control run is carried out, the results of which are also stored and displayed. The balancing is interrupted and ended if a low level threshold value is not reached. For purposes of automatic adaptation of a balancing unit, the measurement run is simultaneously used as a control and calibration run to check the balancing quality obtained by the initial placement of a compensating weight.

Method and apparatus for calibration of balancing unit

A wheel balancing machine is started by operating a timing switch to transmit reset signals to a synchronous counter, revolution counter, a divider and an average value counter. The reset signals are then terminated concurrently with the first zero crossing of the imbalance value signal derived from the body to be balanced. The synchronous counter is provided with incremental pulses containing angular information corresponding to the imbalance. After a first pulse sequence corresponding to a 180.degree. angle of revolution of the body to be balanced and further pulses at angles of 360.degree. at the output of the synchronous counter, 180.degree. pulses are supplied to a revolution counter and also are conducted by means of a differentiating member to the reset input of a flip-flop, whose set input is affected via a further differentiating member by unbalance representing pulses.

Method and apparatus for determining the angle of imbalance of a

The invention relates to a process and a device for the digital indication of the extent of unbalance of a part to be balanced in at least one plane when measuring its unbalance in balancing machines. An alternating voltage corresponding to the extent of unbalance is supplied to an integrator. A reference voltage is supplied to cancel out the output voltage of the integrator. While the integrator is being returned to zero, pulses are supplied to a counter which is thereby actuated to display the extent of the unbalance in digital form.

Process and a device for the indication of the extent of unbalance of a

The balancing position of a wheel is designated by light signals which light up at closer intervals as the balancing position is approached in either turning-in direction. Such light signals upon approaching the balancing position include: a first signal in the range of approximately 180.degree. to 90.degree., another light signal in the range from about 90.degree. to 22.5.degree., a further light signal in the range of approximately 22.5.degree. to 1.4.degree.. Upon reaching the balancing position still a further light signal lights up between about 0.degree. and 1.4.degree.. A model representing the part to be balanced carries a series of light signals in both turning-in directions for each balancing plane provided by balancing apparatus.

Process for the turning-in of a part to be balanced affected by imbalance

The present circuit arrangement is, for example, useful for producing reference signals in response to the rotation of a body such as a wheel or rotor to be balanced. Source signals are produced in response to the rotation of said body. Circuit means are provided for handling and comparing the source signals in such a manner that the reference signals are provided at an output terminal in response to the occurrence of the center of a source signal or in response to the maximum of a source signal. The transmittal may also be controlled in response to the center and the maximum of a source signal.

Method and circuit arrangement for producing and transmitting electrical

The present circuit arrangement is, for example, useful for producing reference signals in response to the rotation of a body such as a wheel or rotor to be balanced. Source signals are produced in response to the rotation of said body. Circuit means are provided for handling and comparing the source signals in such a manner that the reference signals are provided at an output terminal in response to the occurrence of the center of a source signal or in response to the maximum of a source signal. The production of pulses may also be controlled in response to (i.e., at) the center and the maximum of a source signal.

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Buttelborn, Germany

Volker Guyot