Load Cell Signal Output via Force Application Element
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Solution Overview
Problem
Existing load cells pose tripping hazards due to exposed cables used for outputting weighing signals, which can get caught or snagged, necessitating a safer cabling solution.
Innovation Solution
The load cell design allows for external output of the weighing signal via the force introduction element, eliminating the need for cables on the bearing ring and enabling direct signal transmission to a weighing terminal, with options for contactless interfaces like RF-ID transmitters or plug connectors, and incorporating strain gauges or Hall sensors for measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cables are used to transmit the weighing signal from the bearing ring, then the signal can be transmitted to the weighing terminal, but exposed cables create tripping hazards and safety issues
Solution Approach 1:
The patent extracts the cable from the system by implementing contactless communication between the load cell and weighing terminal. The weighing signal is transmitted wirelessly via RF or other contactless interfaces, eliminating the physical cable that causes tripping hazards while maintaining signal transmission capability.
Solution Approach 2:
The patent replaces the mechanical cable connection with an electromagnetic field-based wireless communication system. The load cell communicates weighing data to the terminal through RF transmission, substituting the mechanical cable interface with a wireless electromagnetic interface.
2Ease of operation
If a standardized external interface is implemented at the force application element, then electrical connection to the load carrier is simplified, but the interface must be integrated into the force application element structure
Solution Approach 1:
The patent merges the external interface functionality directly into the force application element structure. The interface is integrated within the force application element housing, combining the mechanical force transmission function with the electrical communication function in a single integrated component.
Solution Approach 2:
The force application element is designed to serve multiple functions: it transmits mechanical force from the load, provides structural support, and houses the external interface for electrical communication. This multi-functional design simplifies the overall system by eliminating separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances safety by eliminating exposed cables, simplifies electrical coupling, and allows for contactless data transmission, making the load cell more reliable and user-friendly.
Implementation Method 1
The measuring transmitter can comprise several, in particular four, strain gauges arranged on the deformation section for detecting stretching and/or compressing deformation of the spring element
Implementation Method 2
The transmitter can include a Hall sensor configured to interact with a magnet
Data Source
Figure 1~2
Figure 3~4
Figure 5A
AI summary
The invention relates to a load cell comprising a spring body with an outer bearing ring, an inner force application element, and an annular deformation section via which the bearing ring and the force application element are rigidly connected to one another, a transmitter for generating an output signal corresponding to a weight acting on the force application element, and means electrically connected to the transmitter, configured to output the output signal generated by the transmitter externally. The means for external output of the output signal are provided on the force application element.