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Modular force-measuring cell for a weighing scale, and weighing scale

A force-measuring element and modular technology, applied in weighing, measuring devices, weighing equipment using elastically deformable parts, etc., can solve the problem of the thermal effect of the storage module on the force sensor, eliminate local temperature effects, save energy Cost, effect of precise adjustment

Inactive Publication Date: 2007-10-24
METTLER TOLEDO CHANGZHOU PRECISION INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, mounting the memory module connected to the local circuitry with a flat flexible ribbon cable to the force sensor would require some production costs
Also, there is a risk that the memory module will have a thermal influence on the force sensor during use, which must be taken into account during compensation

Method used

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  • Modular force-measuring cell for a weighing scale, and weighing scale
  • Modular force-measuring cell for a weighing scale, and weighing scale
  • Modular force-measuring cell for a weighing scale, and weighing scale

Examples

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Embodiment Construction

[0042] Figures 1 and 2 illustrate a modular load cell 2 according to the invention, which is connected to a weighing tray frame 4 and a fastener 3 by screws 36 and 46, respectively, and which consists of a load cell with a sensor 28, The force sensor 20 of 29 is composed of a circuit module 24 with a memory module 245 for storing compensation data and at least one circuit arrangement 243, 244 for converting an analog measurement signal (see also FIG. 5 ).

[0043] The force sensor 20 shown in a preferred embodiment of FIG. 3 has a deformation body 207 designed as a parallelogram measuring element with horizontal parts 2071, 2072 (see FIG. 3, element 20'), the two horizontal The parts are pivotally guided in the manner of a parallelogram linkage. The deformation body 207 connects the weighing frame-mounted fixing part 206 of the force sensor 20 to the force introducing part, in this case the load receiving part 208 . In order to decouple the stress field of the deformation bod...

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Abstract

Disclosed is a modular load cell comprising a force receiver (20) that is provided with sensors by means of which modifications in the state of the force receiver (20), which are caused through the influence of force and temperatures, can be measured. The inventive load cell also comprises a memory module in which compensation data that are assigned to the modular load cell can be stored. A circuit module (24) comprising the memory module and at least one conversion circuit is mechanically and thermally coupled to the force receiver (20). Said conversion circuit converts the analogous signals emitted by the sensors.

Description

technical field [0001] The invention relates to a modular load cell of a weighing scale and a weighing scale with a modular load cell. Background technique [0002] The load cell of a weighing scale is usually equipped with a force sensor which is connected on one side to a weighing frame used as a support and on the other side to a weighing tray frame, through which the force to be measured is passed. Heavy pallet racks are introduced. Force sensors can be configured in a variety of ways. Widely used sensor designs are with an elastically deformable body as a core element or with a force-balancing device in most cases with a balancing force generated by a current-regulating electromagnet and acting via a lever mechanism. [0003] For example, as described in reference [1], DE 199 39 633 A1 and in reference [2], EP 0 670 479 A1, the force sensor called "reaction force member" or "force receiving body" has a The elastically deformable body connects a fixed part of the sens...

Claims

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Application Information

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IPC IPC(8): G01G3/18G01G3/14G01G3/142
CPCG01G3/1418G01G3/18
Inventor 西里尔·布赫乌尔斯·洛尔琼-莫里斯·特伦巴赫
Owner METTLER TOLEDO CHANGZHOU PRECISION INSTR
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