Sartorius Ag

Otto Bock Healthcare Products Gmbh

Sartorius Lab Instruments Gmbh & Co., Kg

Werner Schulze

Matthias Eger

Christoph Berg

Heinz-Gerhard Kohn

Herbert Engelhardt

Michael Wald

Otto Kuhlmann

Gunther Maaz

Michael Mueller

Eberhard Lubke

Tanja Mueck

Helga Covic

Volker Relling

Steffen Hirche

Ulrich Bajohr

Michael Steps

Lothar Golla

Michael Muller

Detlef Erben

Michael M&uuml;ller

Rudolf M&uuml;ller

Stefanie Meyer

The invention relates to a sensor device () for measuring an axial force in the longitudinal pipe direction of a pipe () and/or at least one torque, having a measuring element () comprising an adapter connection () connected to the pipe by means of a flanged socket part, by means of which the pipe can be fixedly coupled to an adjustment adapter (), wherein the axial force and the torque can be fed into the adjustment adapter and can be measured by means of strain gauges () disposed in a sensor area () between the adapter connection and an end of the flanged socket part () opposite the adapter connection at strain gauge locations, wherein the flanged socket part having the sensor area is designed in a pipe shape, wherein the sensor area extends from the adapter connection to the end of the flanged socket part and has a smaller outer diameter than the end of the flanged socket part, wherein the end of the pipe facing the adapter connection and extending past the end of the flanged socket part toward the adapter connection is force decoupled from the sensor area and from the adapter connection, and wherein at least three strain gauge measuring locations are disposed on the circumference of the sensor area.

Pipe-shaped sensor device

A top-pan scale with a scale pan which is supported on at least one force transducer () of a force measurement system () and with a corner load sensor which outputs a signal if the weighing goods are positioned eccentrically on the scale pan. The corner load sensor () has a flat underside via which it can be placed on, or attached to, the scale pan or a bottom pan of the scale. The corner load sensor also has a flat upper side on which a scale pan () can be placed or attached. The corner load sensor () is connected to a positionally fixed electronic processor () via a force-feedback-free connection (). Embodiments of the corner load sensor can therefore be used for a wide variety of scale designs and can be retrofitted easily.

Top-pan scales with corner load sensor

A precision force transducer having a spring element () whose load-dependent deflection is converted into an electrical signal by means of strain gauge elements (). The spring element () is made of a precipitation-hardenable nickel-based alloy with a nickel content in the range of 36 to 60 percent and a chromium content in the range of 15 to 25 percent. The strain gauge elements () are composed of a polymer-free layered film system. This makes it possible to produce a precision force transducer that features great accuracy, low creep and low moisture sensitivity.

Nickel alloy precision force transducer with strain gauge elements

A force sensor with two force input elements to which a force to be measured and a support force are applied. The two force input elements are substantially rotationally symmetrical and are axially spaced apart, and the force to be measured and the support force are applied in radial directions. A spring element, arranged axially between the two force input elements connects these elements and its load-dependent deformation is converted into an electrical signal. A suppression of transverse forces is achieved in a purely mechanical manner so that the influence of transverse forces on the output signal of the force sensor are negligible. Both force input elements are additionally connected to each other by a guide element which encloses the spring element and which has two parallel guide connectors. The guide element is softer in the direction of the force to be measured than in a direction perpendicular thereto.

Force sensor with two force input elements

A force sensor with two force input elements to which the force to be measured and the support force are applied. The two force input elements are substantially rotationally symmetrical and are axially spaced apart, and the force to be measured and the support force are applied in a radial direction. A spring element, arranged axially between the two force input elements connects these elements and its load-dependent deformation is converted into an electrical signal. A substantially tubular cover connected to one of the two force input elements surrounds the spring element. The cover surrounds a portion of the other force input element, forming a circumferential gap. The cover has an inwardly projecting constriction that is spaced apart by a small axial distance from an opposite shoulder on the other force input element.

Force sensor

A measurement device () and associated seating arrangement, in particular for measuring a weight acting on a vehicle seat, that includes: a force transmission element (), which is connectable to a first unit, preferably a vehicle seat, and a measurement assembly (), which is rigidly connectable to a second unit (), preferably a vehicle body part. The force transmission element () is pivotable about at least one axis around the measurement assembly ().

Measurement device and seating arrangement

In a weight sensor operating according to the principle of electromagnetic force compensation, the essential parts are fabricated from a single block of material. The weight sensor has a load receiver ( ), which is connected through an upper guide ( ) and a lower ( ) guide to the housing-integral base body ( ) of the material block. The weight sensor also has several force-reduction translating levers ( ) and coupling elements ( ) between the translating levers ( ). The housing-integral base body ( ) projects in the direction of the load receiver ( ), extends into the space between the two guides ( ) and forms a support point for the first translating lever ( ). The weight sensor is equipped with a coil ( ), which is fastened at the longer lever arm ( ) of the last translating lever ( ) and is situated in the magnetic field of a permanent magnet. To reduce the overall height and to receive higher loads, at least one translating lever is at least partially split into two partial levers ( ). At least one coupling element is split into two partial coupling elements ( ). The partial levers and the partial coupling elements are arranged symmetrically on both sides of the projecting part ( ) of the base body ( ).

Weight sensor

A top-loading balance with a housing, a weighing pan, and a load receptor, wherein the load receptor is connected with a system carrier by a parallel guidance having an upper guide and a lower guide. The system carrier is fixed relative to the housing. One of the guides is divided into two part-guides which, seen in plan view, are disposed preferably on either side of the undivided guide so that the guides do not overlap. In addition, the load receptor, the guides and the system carrier preferably form an integral component. The top-loading balance also includes strain gauges on at least one of the guides to generate a load-dependent electrical signal, which can be measured and converted into e.g. a visual display of the mass. The integral component has two cavities for batteries and the system carrier extends between the two battery cavities. Furthermore, the load receptor is constructed to be approximately U-shaped and the two limbs of the U are disposed laterally near the battery cavities. In addition, the strain gauges are arranged only on the inner side of the undivided guide. Therefore, the top-loading scale is flat and compact without compromising the stability of the scale. Preferably, the balance includes features, such as overload abutments, that protect the delicate parallel guidance, as well as features that ensure accurate measurement of off-center loads.

Flat electronic scales

A lop loaded balance with a load receiver (1, 2, 3) connected by at least one upper (11) and at least one lower guide rod in the form of a parallel guide to a system carrier (4) fixed to the housing, which load receiver, guide rods and system carrier are manufactured from one piece. The system carrier (4, 5, 6, 7) is designed as a frame. The frame-like system carrier is completely surrounded by a second frame (14, 15, 16, 17) supported on the balance feet and that both frames are constructed in a one-piece manner and are connected to one another in such a manner that twistings of the one frame are transferred as little as possible onto the other frame.

Balance with scale on top with a one-piece parallel guide

It is suggested for a balance with one or several weighing cells (1-4, 31) with a total of at least eight wire strain gauges (D.sub.1 -D.sub.4, S.sub.1 -S.sub.4), four of which (D.sub.1 -D.sub.4) are expanded under load and four (S.sub.1 -S.sub.4) compressed under load, in which the eight wire strain gauges are connected together circularly in series so as to form a single Wheatstone bridge which is supplied with voltage along a diagonal (12, 13) (vertical diagonal) and the output signal is taken off along the other diagonal (14, 15) (horizontal diagonal) that a signal is additionally tapped off along the upper horizontal chord (16, 17) and along the lower horizontal chord (18, 19). This makes possible a corner-load adjustment for the balance utilizing the additional signals.

Balance with one or several wire strain gauge weighing cells

Disclosed is a balance with a first parallel guide (3, 3') which resiliently connector a load receiver (2) to an area (5, 5') fixed to the housing and which is resiliently deformed under the influence of the weight to be measured, and with a second, softer parallel guide (8) which is connected by its one end to the load receiver (2) and by its other (11) end via a force receiver which is at least approximately without displacement to the area (5, 5') fixed to the housing and which transfers as a result thereof a fraction of the force of the weight onto the force measuring receiver that both parallel guides (3, 3', 8) exhibit at least approximately the same height and the same length and are arranged close to one another laterally. The second parallel guide is advantageously locate between two partial areas (3, 5, and 3', 5') of the first parallel guide.

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Goettingen, Germany

Werner Schulze