What factors affect the operation of the weighing sensor in an electronic belt scale? And how to solve these problems?

An electronic belt scale is a dynamic weighing device that automatically and continuously measures the weight of material passing through a belt conveyor. It mainly consists of a scale frame, weighing sensor, speed sensor, and instrumentation.

The weighing sensor, which detects the weight of the material passing through, is a core component of the electronic belt scale. Its stability directly relates to the overall measurement accuracy and stability of the belt scale.

During use, understanding the factors that affect the operation of the weighing sensor and cause it to malfunction helps maintain the stability of the overall measurement system and reduce user investment in equipment maintenance and replacement.

In general, there are two main categories of factors that cause the weighing sensor of an electronic belt scale to malfunction or operate abnormally: human factors and environmental factors.

1. Human Factors

· The instantaneous material flow rate is too high, far exceeding the maximum specified range of the weighing sensor. To meet the on-site material flow rate and more accurately detect the material weight, the sensor's range is designed based on the actual material flow. If the actual material flow is artificially increased beyond the sensor's maximum capacity during use, it can easily damage the sensor. To address this, the flow rate should be used as initially communicated to the manufacturer, and the material flow should not be arbitrarily increased.

· On-site personnel perform operations such as welding in the weighing area of the electronic belt scale, especially in the sensor's wiring area, causing damage.

· Besides the material, other heavy objects are placed on the weighing section, or people even walk in the weighing area, causing sensor overload.

To address the human factors affecting the weighing sensor's operation, strict maintenance and operation procedures must be implemented for regulation and supervision. On-site personnel should receive professional training to ensure they have the necessary expertise and awareness to operate the electronic belt scale correctly and proactively.

2. Environmental Factors

· The application environment contains a lot of dust, especially conductive dust, as well as moisture and corrosion, which can cause the sensor to short-circuit, damage the elastomer, and result in signal loss. To counter this, attention should be paid to the sensor's sealing performance, whether its shell material is corrosion- and rust-resistant, and whether the shell surface is coated when selecting the sensor. The shell can be used to protect the internal components of  the weighing sensor from being affected.

· High-temperature environments significantly affect the stress changes in the sensor's elastomer structure, impacting measurement accuracy and potentially damaging the sensor. To address high-temperature environments, choose high-temperature-resistant sensors, implement heat insulation measures, and ensure the sensor has a temperature compensation function to prevent damage and improve measurement accuracy and stability.

· Environments with electromagnetic interference can greatly interfere with the sensor's electrical signals. In such cases, first, strictly inspect the shielding of relevant wires to reduce electromagnetic interference; second, choose a sensor with a signal mode that has stronger anti-interference capability, such as digital signals compared to analog signals.

· In special environments like underground coal mines that are flammable and explosive, sensors with higher sealing performance and explosion-proof strength are required. For such environments, select sensors specifically designed for these conditions with explosion-proof capabilities.

In summary, to address the human factors affecting the operation of weighing sensors in electronic belt scales, it is necessary to establish rules and regulations and strengthen supervision to ensure standardized operation. For environmental factors, the focus should be on selecting high-quality, high-performance products with strong adaptability and anti-interference capabilities.