

The belt scale consists of a weighing bridge, load cell, speed measuring drum, speed sensor and accumulator. The load cell is mounted on the longitudinal beam of the conveyor, which supports the weighing rollers and detects the weight of the material on the belt, generating a voltage signal proportional to the belt load. The speed sensor is directly coupled to the driven pulley or to a large diameter pulley and provides a series of pulses, each pulse representing a unit length of belt run, at a frequency proportional to the belt speed. The accumulator receives the signals from the load cell and the speed sensor, and after A/D conversion, filtering and shaping, enters the microprocessor to perform arithmetic operations, and outputs the cumulative and instantaneous flow rate, the belt speed, the counting pulses, and other parameters.

Belt scale consists of weight device, weighing module, speed sensor and weight indicator. When measuring the weight, the weight device transmits the gravity of the material to the weighing module, and the weighing module outputs the voltage (mV) signal which is proportional to the gravity of the material, and after amplifying it with a current amplifier, the analog-to-digital converter turns it into the digital quantity a when it is inputted to the speed sensor, and the number of pulses b as the output of the speed sensor is also transmitted to the The total amount of material that continuously passes through the belt can be obtained by accumulating the measurement data.
The weighing belt conveyor is a three-roller fully suspended weighing structure. Both of them have no trunnion pivot point and movable parts, and are not interfered by all kinds of lateral and horizontal forces other than non-vertical forces (including friction force of rollers, horizontal force of belt and material running), which reduces the boundary effect error and senses the vertical force that needs to be measured for weighing more quickly and accurately.
The weighing module adopts four high-precision load cells, which effectively reduces the influence of the bias force caused by the belt run-off and material accumulation, so that the long-term measurement accuracy is more stable under the same situation. There are no levers and trunnion pivots in the structure of the belt scale frame, which makes the scale frame structure relatively simple and lightweight, and there is no problem of wear and tear of pivot points, accumulation of dust, etc., so there is no need for frequent cleaning and maintenance.
Comprehensive use of the third generation of Farbond core weighing technology, weighing accuracy, long-term stability and anti-interference performance have been more than doubled. The weighing instrument is developed and upgraded for the belt scale environment, using the powerful ARMCortex-M3 core, STM-32-bit microprocessor for control, 24-bit analog-to-digital converter, and equipped with a high-precision PID regulator, with accurate data, no drift, and can provide a password lock function, which is safe, reliable and trustworthy, and it is called the most perfect weighing instrument of belt scales in the industry at present.
The self-developed industrial-grade digital load cell of the second generation strengthens the dynamic digital filtering function on the basis of the original generation of digital load cells, increases the linear compensation function, overcomes the shortcomings of traditional sensors, such as small output signal, short transmission distance, poor anti-interference ability, etc., and makes the data in the process of dynamic weighing more real, stable and reliable. Numerous customer cases have proved that the digital load cell has excellent load characteristics, creep characteristics, temperature characteristics, moisture-proof and explosion-proof characteristics and long-term stability.
In addition to accuracy and stability, Farben belt scales have an unrivaled advantage in anti-interference performance. From the source of interference, sensitive devices to the propagation path, by analyzing the sources of interference in the belt scale, the protective measures cover a comprehensive range, eliminating the impact of on-site electromagnetic interference on the stability and accuracy of the belt scale, together with the Far Eastern independent research and development of intelligent control instrumentation, to create the most accurate, stable and perfect high-end belt scale solutions.