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Related Concept Videos

Pressure Gauges01:20

Pressure Gauges

Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...

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A high-sensitivity hydraulic load cell for small kitchen appliances.

Roman Pačnik1, Franc Novak

  • 1BSH Hišni aparati d.o.o., Savinjska cesta 30, 3331 Nazarje, Slovenia. roman.pacnik@bshg.com

Sensors (Basel, Switzerland)
|December 14, 2011
PubMed
Summary

This study introduces a novel hydraulic load cell using hydroformed metallic bellows for small kitchen appliances. This cost-effective, compact design offers an alternative to industrial load cells, achieving good accuracy.

Keywords:
FEM, sensorHydraulic load cellweighing

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Area of Science:

  • Mechanical Engineering
  • Materials Science
  • Sensor Technology

Background:

  • Existing hydraulic load cells can be bulky and expensive for small appliance integration.
  • There is a need for compact, low-cost weighing solutions in consumer electronics.

Purpose of the Study:

  • To develop and evaluate a novel hydraulic load cell using hydroformed metallic bellows.
  • To assess its suitability for integration into small kitchen appliances.
  • To compare its performance against existing industrial hydraulic load cells.

Main Methods:

  • Design and fabrication of a hydraulic load cell utilizing hydroformed metallic bellows.
  • Integration of the load cell into a small kitchen appliance prototype.
  • Performance testing to evaluate non-linearity, hysteresis, and temperature effects.

Main Results:

  • The developed load cell demonstrated good non-linearity and minimal hysteresis.
  • A temperature-induced error of 7.5% was observed.
  • The design is a simple, low-cost, and compact alternative for industrial applications.

Conclusions:

  • The hydroformed metallic bellows hydraulic load cell is a viable, cost-effective solution for small appliances.
  • Software compensation can effectively address temperature-related inaccuracies.
  • This technology offers a promising alternative to conventional load cells in specific applications.