How does load cell sensor work?
2024-02-29
Load Cell Sensor is a sensor device used to measure weight or mass, usually composed of a carrier, an elastomer and a sensing element. Its working principle is mainly based on the principles of elastic deformation and resistance change. First, when an object is placed on the sensor carrier, the carrier will undergo slight bending or compression deformation due to the gravity of the object. This deformation will be transmitted to the elastomer of the sensor, and the elastomer itself will have a certain deformation ability to adapt to the pressure of the object. Second, the elastomer is mounted with a sensing element, usually a resistance Strain Gauge or thin film sensor. When the elastomer deforms, the sensing element will also be affected and the resistance value will change. This change in resistance value can be converted into a voltage or current signal through a circuit, and then the final weight or mass value can be obtained through amplification, filtering, etc. In practical applications, Load Cells can output weight data by connecting to a display or controller, thereby achieving accurate measurement and monitoring of the weight of objects. Some common load cell types are: Resistive Strain Gauge Load Cell: Uses the resistive strain effect to measure the weight of an object. Commonly used ones include chip resistive strain gauge load cells and Beam Load Cells. Pressure load cell: Determine the weight by measuring the pressure generated when an object is stressed. Commonly used ones include pressure sensors and piezoelectric sensors. Magnetic induction load sensor: Measures the weight of an object by measuring changes in the magnetic field. Common ones include Hall effect load sensors and magnetoelectric sensors. Different types of sensors are suitable for different weighing scenarios and requirements.
