The principle and application environment of weighing module sensors

2022-01-10 13:38

　　Electronic weighing instruments made with load cell sensors have been widely adopted across various industries to achieve fast and accurate material weighing. This trend has been particularly accelerated by the advent of microprocessors and the continuous improvement of automation processes in industrial production. Weighing sensor It has become an essential piece of equipment in this process, Weighing sensor The applications range from weight measurement in large storage tanks, hoppers, crane scales, and truck scales to batching systems used for mixing and dispensing various raw materials, as well as automated inspection during production processes and powder feed control. Today, load cells are utilized in nearly every weighing application—truly spanning an incredibly wide array of fields.

　　One: The Working Principle of Weighing Module Sensors

　　When the transmission mechanism applies gravity to the weighing sensor, the sensor experiences an external force. Any resulting changes in its shape or position will alter the sensor's power output, and subsequently, the load's weight is converted by the weighing sensor and displayed digitally.

　　2: Selecting the Accuracy Grade of Weighing Module Sensors

　　The accuracy levels of weighing sensors include technical specifications such as nonlinearity, creep, repeatability, hysteresis, and the sensitivity of the sensor. When selecting a weighing sensor, it’s important to consider both the accuracy grade and the cost of the electronic scale. Generally speaking, the sum of the three indicators—nonlinearity, non-repeatability, and hysteresis—tends to be slightly higher than the standard values.

　　Three: The Usage Environment of Weighing Module Sensors

　　A weighing sensor is essentially a device that converts mass signals into measurable electrical signals. First and foremost, we must carefully consider the actual working environment of the weighing sensor, as this is crucial for selecting the right sensor. The suitability of the sensor’s environment directly affects whether it can function properly—and even impacts the overall reliability and safety of the sensor. Generally speaking, high-temperature environments can cause issues such as melting of the sensor’s coating, loosening of solder joints, and structural changes in the elastomer due to stress. Meanwhile, dust and humidity may lead to short circuits within the sensor. In highly corrosive environments, the sensor’s elastomer is particularly vulnerable to damage or even short circuits. Therefore, when choosing an environment for using a weighing sensor, we must carefully evaluate all these factors.

There are several types of strain-gauge load cells.

Understanding the output signal of load cells

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