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Bending Beam Load Cell Basics

Bending beam load cells are a versatile and cost-effective solution for many weighing and force measurement applications. These types of miniature load cells are small in dimension, which makes them ideal solutions for compact testing environments and for embedding into machines or products for continuous performance measurement.

The use of bending beam load cells expands across industries and applications, for weighing scales, medical devices, industrial process controls, robotic designs, packaging machinery and civil engineering projects.

How Bending Beam Load Cells Work

A bending beam load cell converts a force applied to it into an electrical signal by measuring the flexure of the beam. This is done by attaching strain gages to the beam. When the beam bends, the strain gages change their resistance, which is then converted into an electrical signal by a Wheatstone bridge circuit. The output signal is proportional to the applied load.

The bending beam load cell is bolted to a support through the two mounting holes. Under the covers, you can see the large hole bored through the beam. This forms thin sections at the top and bottom surface, which concentrate the forces into the area where Interface’s proprietary strain gages are mounted on the top and bottom faces of the beam. The gages may be mounted on the outside surface, as shown, or inside the large hole.

The compression load is applied at the end opposite from the two mounting holes, usually onto a load button that the user inserts in the loading hole.

MB Miniature Beam Load Cell

MB MINI BEAM LOAD CELL

The Interface Model MB is a miniature beam load cell used in test machines and a variety of low capacity applications.

  • Standard Capacities are 5 to 250 lbf (22.2 N to 1.11 kN)
  • Proprietary Interface temperature compensated strain gages
  • Performance to 0.03%
  • Low height – 0.99 in (25.1 mm)
  • Eccentric load compensated
  • ±0.0008% /˚F – max temperature effect on output
  • Low deflection

MBI Overload Protected Miniature Beam Load Cell

Interface’s Model MBI Overload Protected Miniature Beam Load Cell has better resistance to off-axis loads then other similar load cells and is fatigue rated.

  • Standard capacities from 2 to 10 lbf (10 to 50 N)
  • Proprietary Interface temperature compensated strain gages
  • Performance to 0.03%
  • Low height – 1in max
  • ±0.0008% /˚F – max temperature effect on output
  • 10x overload protection

MBP Overload Protected Miniature Beam Load Cell

Our Model MBP series Mini load cells provide a similar performance to Model MB series with the added safeguard of internal overload protection. This patented overload protection is accomplished via hard stops that are EDM machined into the load cell flexure. This provides a greater overload protection (2.5-10lbf ±1000% of full scale capacity, 100 N ±500% of full scale capacity), giving the user added protection in more severe applications.

  • Standard capacities from 2 to 10 lbf (10 to 50 N)
  • Proprietary Interface temperature compensated strain gages
  • 10x overload protection
  • Low height – 0.99 in (25.1 mm)
  • ±0.0008% /˚F temp. effect on output
  • 5′ Integral Cable (custom lengths available upon request)
  • NIST Traceable Calibration Certificate

MBS Parallelogram Load Cell

The Interface MBS Parallelogram load cell is made of lightweight aluminum construction and highly suitable for medical and robotics applications.

  • Capacities from 2.2 to 10 lbf (9.8 to 44.5 N)
  • Lightweight
  • Nonlinearity error 0.02% FS
  • Ideal for OEM applications

Double Bending Beam Cells

A very useful variation on the bending beam design is achieved by forming two bending beams into one cell. This allows the loading fixtures to be attached at the threaded holes on the center line, between the beams, which makes the sensitive axis pass through the cell on a single line of action.

Bending Beam Load Cell Applications

Material testing is a common application for bending beam load cells. This type of miniature load cell measures the forces applied to materials with a high degree of accuracy to determine stiffness, strength and durability of the specimen.

It is quite common to find bending beam load cells in industrial automation machines and robots to precisely measure the forces required for control, safety and efficiency. In robotics specifically, bending beam load cells will measure the force applied to the robot’s arms and grippers. The data is used to control the robot’s movements and to ensure that it is not damaging the objects it is handling.

Aerospace engineering have long used bending beam load cells in design, testing and manufacturing of aircraft and spacecraft. Automotive engineering use bending beam load cells to design and test vehicles for safety and reliability.

Due to Interface’s ability to custom design bending beam solutions that meet strict size, capacity and accuracy requirements, our products are commonly used in medical and healthcare applications.

Bending Beam Application for Medical Device Testing

In this application, the medical device product lab needs to apply known forces to stent and catheters to ensure they pass all necessary strength and flexibility testing. MBP Overload Protected Beam Miniature Load Cell is placed behind the guide wire for the stent or catheter. The motor will spin the linear drive, push the load cell, and guide the wire through the testing maze. The bending beam load cell connects to the DIG-USB PC Interface Module to record and store testing data for analysis. Read more.

Bending Beam Application for Vertical Farming

Vertical farming is the production of produce in a vertical manner using smart technology systems, while indoors using an irrigation system. A wireless force measurement solution is needed to monitor the amount of water being used, to ensure the produce is being watered just the right amount. Interface suggests installing four MBI Overload Protected Miniature Beam Load Cells under each corner of the trays of the produce to accurate measure the weight during watering. A JB104SS 4-Channel Stainless Steel Junction Box connects to each bending beam cell and to a WTS-AM-1E acquisition module. The device wirelessly transmits the sum weight to the WTS-BS-1-HA Wireless Handheld Display for multiple transmitters, and the WTS-BS-6 Wireless Telemetry Dongle Base Station. Interface’s Wireless Telemetry System monitored and weighed the amount of water being used on the produce in this vertical farming system to increase yield and conversation. Read more here.

Additional Resources

How Do Load Cells Work?

The Basics Of Shear And Bending Beams

Interface Mini™ Load Cell Selection Guide

Introducing Interface Load Cell Selection Guides

The Anatomy Of A Load Cell

Mini Load Cells 101

Load Cell 101 And What You Need To Know

Vertical Farming for Sustainable Food Production on Earth and Beyond

Vertical farming is a method of producing crops in vertically stacked layers, typically in indoor environments such as warehouses or greenhouses. This innovative agricultural approach offers a number of advantages over traditional farming methods, including higher crop yields per unit of land, more efficient use of resources such as water and energy, and the ability to grow crops in urban areas where space is limited. While vertical farming is currently being explored to increase food production on Earth, it also has applications in space R&D and for food sustainability projects.

In space, where resources such as water, energy, and land are limited, vertical farming can offer a viable solution for producing food. By using vertical stacking of crops, indoor environments, and controlled conditions, vertical farming can potentially overcome challenges such as gravity, atmospheric conditions, and limited space. This could enable sustainable food production for future space missions, space settlements, and colonization efforts.

As the global population continues to grow, and urbanization increases, vertical farming is a promising approach for addressing food scarcity and production challenges on Earth. With most the world’s population projected to live in urban areas by 2050, the need for localized food production close to urban centers becomes more critical. Vertical farming can provide fresh produce year-round, reduce the need for transportation, minimize the use of pesticides, and optimize resource utilization, making it a sustainable and efficient method for urban food production.

Interface sensor technologies and instrumentation are being utilized to expand the capabilities and possibilities in agriculture on Earth and in space. In our new case study, Vertical Farming on Earth and in Space, we explore products and solutions for challenges related to farming on earth and beyond. These solutions utilize load cells, multi-axis sensors, wireless instrumentation and devices for irrigation and growth monitoring systems, robotics, and farming equipment. The case study highlights innovation from a collaboration of industries including agriculture, space, and automation.

 

Vertical Farming Robotic Monitoring

In vertical farming applications, automated mechanics pick up and move the products, thus using less human involvement and contamination. To keep an eye on these automated systems, a wireless force measurement system monitors the robotics that pick up and move the produce to their next destination of the packaging process. Interface suggests installing SPI Low Capacity Platform Scale Load Cells, along with WTS-AM-1E Wireless Strain Bridge Transmitter Modules in the center of the platforms of the robotic lifting system that move around the produce. The WTS-AM-1E’s wirelessly transmit the data collected from the SPI’s to the WTS-BS-1-HA Wireless Handheld Displays for multiple transmitters, and the WTS-BS-6 Wireless Telemetry Dongle Base Station when connected to a computer. Read more here.

Vertical farming has the potential to revolutionize food production in space and on Earth, addressing the challenges of feeding a growing global population, particularly in urban areas. The intersection of various industries and the use of innovative technologies, including interface force measurement solutions, can play a crucial role in advancing vertical farming as a sustainable solution for future food production in space and on our home planet.

The collaboration between education, space, agriculture, and manufacturing sectors, including the use of interface force measurement solutions, can accelerate the development and deployment of vertical farming technologies for space and Earth. These solutions can provide data on factors such as plant growth, resource usage, and environmental conditions, which can be used to optimize the design and operation of vertical farming systems for maximum sustainability and productivity. Read the case study here.

ADDITIONAL RESOURCES

Inventive Agriculture Monitoring and Weighing Solutions

Aerospace Brochure

Force Sensors Advance Industrial Automation

Solutions to Advance Agriculture Smart Farming and Equipment

Using Multi-Axis Sensors to Bring Robotics to Life

Vertical Farming on Earth and in Space

Inventive Agriculture Monitoring and Weighing Solutions

Interface test and measurement products are ideal for agriculture industry use cases to improve machinery, facilitate planting and harvesting, as well as managing animals. Whether using techniques for single crop or mixed farming, up to commercial agriculture use cases, our solutions are used for sensor-based monitoring and weighing.

Interface standard and custom load cells, torque transducers, and data acquisition systems are ideal for monitoring and weighing agricultural applications. These products can be paired together to measure to ensure efficiency, sustainability, and proper production planning for crop cultivation and animal rearing. Farming and food production is basic to our global existence. How we manage our resources, accessibility and increasing production is highly dependent on invention and innovation that often requires constant monitoring and weighing.

Many of the use cases for Interface products require capabilities to regulate through harsh weather conditions such has humidity and unbearable temperatures while still maintaining a high testing and measurement performance. Here are a few example of how Interface products are used in various agriculture monitoring and weighing applications.

Farming Irrigation Monitoring and Regulation Solution

Advancements in food production has increased the use of vertical farming throughout the world. This type of farming is the production of produce in a vertical manner using smart technology. The system highlighted here is for indoor use, through a transducer monitoring system that is monitoring an irrigation system. A wireless force measurement solution is needed to monitor the water volume for healthy and safe production. For this application, Interface recommended installing four MBI Overload Protected Miniature Beam Load Cells at each corner of the produce trays to measure the water. Interface’s JB104SS 4-Channel Stainless Steel Junction Box is connected to each load cell, and to a WTS-AM-1E Wireless Strain Bridge Transmitter Module that wirelessly transmits the sum weight to the WTS-BS-1-HA Wireless Handheld Display for multiple transmitters, and the WTS-BS-6 Wireless Telemetry Dongle Base Station when connected a computer. Results can be displayed, logged, and graphed seen in real time for continuous monitoring.

Silo Weighing and Monitoring

Silos are used across the farmlands throughout the world. They help in feed and storage. Technology advances the accuracy in silo management. In this application, a customer wants weigh and monitor the content inside their silos used in crop rotation farming. Seasonality and crop type each have different silo requirements. For this solution, we recommend using Interface’s A4200 or A4600 Zinc Plated Weigh-Check Load Cells, paired with a 1280 Programmable Weight Indicator and Controller. Whether using in a small farm or large commercial use, this type of smart farming solution is able to accurately monitor the amount of content by weight, independent of the type of crop. Another silo solution can be viewed in our Silo Grain Dispensing App Note.

Smart Vertical Farm Monitoring

The use of automated machines and robotics is growing in smart agriculture. This is a strong case to use this type of sensor technology in vertical farming. As machines are used in production, safety and less contamination provide added benefits. A wireless force measurement system is ideal for monitoring the robotics that pick up and move the produce to their next destination of the packaging process. Interface recommended installing SPI Low Capacity Platform Scale Load Cells, along with WTS-AM-1E Wireless Strain Bridge Transmitter Modules, in the center of the platforms of the robotic lifting system that move around the produce. The WTS-AM-1E’s wirelessly transmit the data collected from the SPI’s to the WTS-BS-1-HA Wireless Handheld Display for multiple transmitters, and the WTS-BS-6 Wireless Telemetry Dongle Base Station for monitoring the performance live.

Livestock Weighing System

For as long as farmers have been rearing animals, the weighing of their livestock has been at the top of farm management. From the days of using simple pencil and paper used in husbandry and farm management, to sophisticated agriculture management software and equipment, the need accurately weighs their livestock is basic farm management. A successful farm will have good measurements in the management of water, shelter, storage, feed, and husbandry. The benefits of an accurate system to do so are essential, whether for small farms or large commercial farming operations. In this application, the farmer group wants to make sure their cows are at a healthy weight and want to maintain their weight. This is also valuable for help to identify optimal time for breeding based on the weight of their livestock. Read more or watch this video to learn more about this type of application.

Interface load cells and torque sensors are used to give precise data results that is reliable and quintessential for various applications in the agricultural field. If you are looking for load cells, instrumentation or need help in designing a custom solution, please contact us.

ADDITIONAL RESOURCES

Solutions to Advance Agriculture Smart Farming and Equipment

Interface Solutions Used in Growing Agriculture Innovation