HBMLoad cellIs a sensor that converts a mechanical input force (such as weight, tension, compression, torque, strain, stress, or pressure) into an electrical output signal, the value of which can be used to represent the magnitude of the force. To inform operators or as input to control machines and processes, signals may be transmitted to indicators, controllers or computers.

The basic idea behind the working principle of load cells is that they react to applied forces and convert their values into quantifiable values. There are many types of force sensors on the market based on different sensing elements. Certain substances are called dynamistors and change their resistance ratings when they are subjected to force.

They usually include electrodes and sensing materials. A force sensor can be used to measure the force applied to an object. The applied force can be determined by measuring how much the resistance value of the dynamistor changes. Force-sensing resistors are used in the design of most force sensors.

The operation of a dynamistor is based on the contact resistance characteristics. In a force resistor, a conductive polymer sheet changes resistance when a force is predictably applied to its surface. The film consists of a matrix of conductive and non-conductive particles in submicron size.

When a force is applied to the surface of the film, the tiny particles touch the sensor electrode, which changes the resistance of the film. The degree of change of resistance value can be used as a measure of applied force. In other words, it changes the resistance, which can then be measured based on mechanical force or pressure.

Considerations when selecting a force sensor

There are several different designs and uses of force sensors, and Chapter 3 explores the different types of force sensors. In this section, the considerations for sensor selection are highlighted. This will enable people to make informed decisions, especially after reading about the different types available.

cost

The cost of the applied sensor is always a very important factor in choosing a sensor. Depending on the application area, sensors can be too expensive, limiting the profitability of the project.

repeatability

It is important to consider whether the variables being sensed can be reliably measured in the same Settings. Repeatability measures the sensor's consistency with itself to see if it consistently produces the same results under the same conditions. Although this value is often associated with accuracy, the sensor may not be accurate and still be able to produce repeated observations.

Accuracy and precision

This is often a key requirement that the product must meet. Although accuracy and precision are sometimes used interchangeably in sensor marketing, they mean two different things. When choosing which specification is more important, it is crucial to understand the difference between the two.

environment

The choice of force sensor is based on the environment in which the device is used. Its exposure to a wide range of environments is a concern. Whether used in industry, agriculture, medical or automotive, the harsh environment in which the device is placed can affect the accuracy of the data read by the sensor. It is important to pay attention to temperature and humidity levels.

Depending on how they are built, the output of force sensors can be severely affected by temperature changes, however, there are also powerful force sensors that can help solve this problem. Finally, it is important to have a sensing solution that will operate precisely in any scenario where it may be used.

durability

The durability of the sensor should be considered when selecting the sensor. Factors to consider include: How robust is the sensor? Does it have a long life before it needs to be replaced? Can it survive in harsh environments? Each sensor has a limited useful life, usually defined by the time it is in operation or stored.

Design, materials, manufacturing methods, concentration levels, and surrounding environmental conditions are some of the factors that can affect the life of a sensor. To ensure that the sensor is cost-effective, suitable for its intended use, and reduces the possibility of drift (which occurs when the sensor is exposed to an environment that affects its accuracy), durability is critical.

Response time

It is important to choose a force sensor with the right response time. If the applied force is rapid and continuous, a force sensor with a faster response time must be used, whereas if the force is stable and slow, a slow response force sensor can be used.

sensitivity

Before choosing one of the force sensors on the market, this topic really brings home the importance of a thorough understanding of the project requirements. The open load sensor is one of the most accurate force sensors on the market today and can be used for a wide range of applications.

Constituent factor

Whichever force sensing technology is chosen for their application will be heavily influenced by the size and shape of their product.

What is the working principle of the German HBM load cell introduced above? What is a load cell? The problem. In addition, Shenzhen Oudejie Technology specializes in selling new imported HBM weighing sensors, and promises to sell products are new imported original, while providing our customers with quotation, selection, product information and other services.