Sartorius Ag

Sartorius Weighing Technology Gmbh

Satorius Weighing Technology Gmbh

Sartorius Lab Instruments Gmbh & Co., Kg

Alfred Klauer

Christian Oldendorf

Christoph Berg

Gunther Maaz

Michael Laubstein

Heinrich Feldotte

Thomas Schink

Michael Mueller

Jan Von Steuben

Klaus Dardat

Erich Bettwieser

Joerg Peter Martens

Rolf Michaelis

A weighing device having a plurality of digital weighing cells (), each including a sensor connected to a force transmission unit (), each generating a digital measurement value corresponding to a transmitted force at a measurement time point, and including a data processing device that converts the digital measurement values to transmission units configured to be transmitted over a data communications line () to a central control unit () connected to all weighing cells for analysis of the transmission units. The central control unit () calculates a digital combination value based on the transmission units originating from the various weighing cells (), the combination value representing a weight force with which the weighing device () is loaded at a weighing time point. The conversion of the measurement values to transmission units involves a pairing of each converted measurement value with a time value.

Weighing device having a plurality of digital weighing cells providing digital measurement values and associated time values to a central control unit, weighing cell, and method

A method and an apparatus for dynamically checking the weight of objects (-) which are guided across a weight-sensitive zone () of a weighing device () at an adjustable conveying rate by a conveying mechanism (-). At regular intervals, the weight-sensitive zone () supplies individual measured weight values (E, . . . , E) from which resultant weight values are derived in a digital evaluation unit () by averaging. The evaluation unit () includes a plurality of cascaded averaging filters (-) which have different filter lengths that are varied by a common scaling factor depending on the conveying rate.

Method and apparatus for dynamically check weighing objects conveyed at adjustable rates using varying filter lengths

A method and an apparatus for dynamically check weighing objects (-) that are guided across a weight-sensitive zone () of a weighing device () by a conveying mechanism (-). At regular intervals, the weight-sensitive zone () supplies individual measured weight values (E, . . . , E) from which resulting weight values are derived in a digital evaluation unit () by calculating mean values. The evaluation unit () includes a plurality of cascading mean value filters (-) that have different filter lengths which are varied by a common scaling value in accordance with a spatial dimension of the objects (-).

Method and apparatus for dynamically check weighing conveyed objects, using filter lengths that vary with object size

Measurement amplification methods and devices for detecting a monopolar input signal (U) by integrating A/D conversion. Before being digitized, the input signal (U) is inverted according to the so-called Chopper principle and converted into a bipolar intermediate signal (U). A reference voltage (U) used in A/D conversion undergoes polarity changes synchronized with the polarity changes of the intermediate signal (U). Offset and drift are eliminated by totaling an even number of individual measurements.

Measurement amplification device and method

Measurement amplification methods and devices for detecting the detuning of a measurement bridge () to which a bipolar, rectangular supply voltage (U) is supplied. The methods and devices use integrating A/D conversion and are characterized in that a reference voltage (U) used for the A/D conversion undergoes polarity changes synchronized with the polarity changes of the supply voltage (U). Offset and drift are eliminated by totaling an even number of individual measurements.

A scale having an electronic weighing system to generate a weight-dependent signal and a digital signal processing unit (). The digital signal processing unit () has a circuit or program parts which measure the time elapsed since connection of the voltage to the scale. To dramatically reduce the time required for the scale to reach its full accuracy after connection of the voltage supply, the digital signal processing unit () has computation modules () that correct the weight-dependent signal generated by the weighing system by a correction value that depends on the time elapsed. The magnitude of this correction value, starting from an initial correction value, converges with increasing time elapsed to a constant end value that differs from the initial correction value.

Electronic scale and method for weight measurement including correction means for correcting a weight dependent signal

An electronic weighing sensor ( ) having a digital signal processing unit ( ), which includes at least one filter ( ) with low-pass characteristic. By means of the filter ( ), the direct-current component (m) is determined from the output signal of the weighing sensor and the weighing result is derived therefrom. A signal, which is dependent on the amplitude of the vibrations, is determined by the digital signal processing unit ( ) and electronic components ( ) change the direct-current component (m) as a function of the magnitude of the vibration-dependent signal. This significantly improves the performance of the weighing sensor ( ) with respect to shocks and vibrations in the installation site of the weighing sensor ( ).

Electronic weighing sensor which changes the dc component of the weight signal based on the magnitude of the vibration-dependent component

An analog/digital converter including an amplifier (,) wired as an integrator, a comparator (,) electrically downstream from the integrator, a time counter (,) which continually counts the pulses of a pulse generator (,), a bistable element (,), and additional circuitry. The bistable element (,) drives the input network of the amplifier (,) with at least one switch (,) in such a way that in one of its two positions (&ldquo;off&rdquo; condition) a current I,proportional to the analog measured value is integrated, and in the other position (&ldquo;on&rdquo; condition) a constant reference current I,with opposite polarity to the current I,is integrated in addition to current I,. The switching of the bistable element from the &ldquo;off&rdquo; condition to the &ldquo;on&rdquo; condition is controlled by the time counter, and the switching from the &ldquo;on&rdquo; condition to the &ldquo;off&rdquo; condition (switch-off time) is controlled by the output signal of the comparator, which is generally synchronized with the pulses of the pulse generator. The pulses of the pulse generator (,) are summed to a result during the time the bistable element is in its &ldquo;on&rdquo; position. The additional circuitry displaces the switch-off time of the bistable element (,) beyond the time resulting from the above synchronization by a number of pulses of the pulse generator (,) determined by an arithmetic unit (,).

Integrating analog/digital converter

An electronic balance with scale on top having a drive means for a magnetic agitator which integral onto the balance scale. This enables the work steps of agitating and weighing to be performed simultaneously and by the same device.

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Goettingen, Germany

Alfred Klauer