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ICS-FH-16 High Precision Belt Scale
Strength and Honors
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Electronic belt scale has been awarded the title of "National Manufacturing Single Champion Product".
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Chief drafting unit for the national standard "Continuous Totalizing Automatic Weighing Instrument (Belt Scale)".
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The first and only listed company in the dynamic weighing industry (Stock Code: 300466).
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The first and only company globally to obtain both the 0.2% belt scale OIML certificate from the International Organization of Legal Metrology and the EU EC certificate.
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Ranked first in domestic sales for 19 consecutive years and first in international sales for 9 consecutive years in belt scale sales statistics by the Weighing Instrument Association.
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Over 100 related product patents, including more than 20 invention patents, 4 outstanding invention patents, and 7 core weighing technologies.
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30 years of R&D and manufacturing expertise, with cumulative sales exceeding 50,000 units/sets of equipment and over 6,000 customers.
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Vice Chairman Unit of the China Weighing Instrument Association.
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Hosts the Jiangsu Provincial Automatic Weighing Instrument Engineering & Technology R&D Center and the Jiangsu Provincial Dynamic Weighing Engineering & Technology Research Center.
Product Overview
The electronic belt scale is a continuous, automatic weighing device for bulk materials on conveyor belts. Its key feature is the continuous and automated weighing process, typically requiring no operator intervention. It is widely used in industries such as power generation, ports, steel, chemicals, cement, coal, mining, and food.
The Saimo ICS-FH-16 high-precision electronic belt scale utilizes 8 sets of double-idler floating scale frames arranged in series, comprising 16 high-precision shear beam load cells. It is equipped with a more accurate overhead speed measurement device. The weighing and speed signals are converted from analog to digital on-site by the PLR-DS digital converter before being transmitted to the integrator.
Product Features
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Saimo Position Difference Stability Technology: Monitors belt condition changes in real-time to maintain long-term weighing accuracy.
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Saimo Multi-point Flow Compensation Technology: Ensures high weighing accuracy across different material flow rates.
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Saimo Triple-Check Weighing Technology: Detects load cell anomalies in real-time, seamlessly switches out faulty sensors, and ensures continuous weighing.
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Saimo Floating Balance Weighing Bridge: An innovative design breakthrough. Features no mechanical restraints, with dual load cells for direct force transmission, resulting in high measurement precision.
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On-site Digital Signal Converter: Performs Analog-to-Digital (A/D) conversion at the scale frame, digitally transmitting signals over long distances. This guarantees high signal transmission accuracy and improves belt scale reliability.
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Optional Saimo Remote Diagnostic Box: Utilizes wireless networks and big data technology for remote monitoring, diagnosis, and maintenance of the belt scale, providing customers with professional adjustment advice and guidance.
Technical Advantages
Technical Advantage 1: Position Difference Theory
Saimo's research found that two sets of belt scale frames installed at different locations on a conveyor detect different weight values for the same material due to varying belt tensions at the installation points. The force on Frame A is greater than on Frame N. Position Difference = A - N.
Further research revealed that the magnitude of the position difference between A and N reflects the belt's flexibility/hardness and tension state between these points. Changes in this state are a primary factor affecting the belt scale's long-term stability.
Based on this theory, by detecting the position difference during calibration versus during normal operation, a deviation error is obtained. This deviation reflects changes in belt flexibility and tension. Using this deviation error to correct the span calibration factor obtained during calibration, and then applying the corrected factor for weighing, compensates for the impact of belt condition changes on accuracy, ensuring long-term stability.
Technical Advantage 2: Floating Balance Scale Frame Structure
The key to high-precision belt weighing lies in the weighing bridge accurately and completely transferring the material weight on the belt to the load cells, without any interfering forces. The Saimo ICS-FH series floating balance electronic belt scale employs a unique free-floating balance structure mounted on the conveyor frame. Two load cells are installed at both ends of the load-bearing beam. Their force-receiving parts are cylindrical and connect to the idler support beams via universal joints. The two idler support beams are connected by two link beams, forming the complete weighing bridge. Two sets of weighing idler brackets are symmetrically mounted on the bridge relative to the load-bearing beam. The weighing idlers on these brackets transfer the material weight to the load cells.
Since the weighing bridge is connected only via the two universal joints to the load cells, the entire bridge can float freely around these joints. No interference forces or internal structural stresses exist. The weighing idlers on the bridge accurately and completely transfer the material weight to the load cells, achieving high-precision measurement.
This free-floating, balance structure, with its minimal force transmission path, no restraints, and direct connection, ensures accurate, reliable, and high-precision weighing. The placement of two load cells at the beam ends provides strong resistance to off-center loading and adaptability to wide belts and high speeds. The simple bridge structure allows for easy installation, requires no maintenance, and is the optimal equipment for high-precision conveyor weighing.
Technical Advantage 3: Triple-Check Technology
Taking a 4-idler belt scale as an example: when four load cells are configured for triple-check weighing, their four independent signals are sent to the PLR-DS converter. The converter converts the analog weighing signals to digital locally and transmits them to the FH-03 integrator. The integrator combines the four independent weighing signals in different configurations along with the speed sensor signal to calculate three sets of accumulated totals and instantaneous flow rates: one primary total and two auxiliary totals.
The primary total is generated by the combination of all four load cells supporting the floating balance frame. The two auxiliary totals are generated by: 1) a simulated single-lever frame supported by load cells A and B (with C and D as pivots), and 2) a simulated single-lever frame supported by load cells C and D (with A and B as pivots). The integrator normally displays the primary total while continuously comparing the two auxiliary totals online. If the difference between the two auxiliary totals exceeds a set limit, the output signals of the load cells constituting these auxiliary totals are compared individually. The load cell group whose error exceeds the limit is identified as faulty. The integrator then switches to display the fault-free auxiliary total, ensuring reliable weighing continues even if one load cell fails.
In summary, a belt scale with triple-check functionality allows real-time monitoring of sensor signals, timely detection of anomalies or faults, and uninterrupted weighing in case of a sensor issue. This significantly reduces downtime caused by sensor failure and prevents major economic losses due to inaccurate measurement from a faulty sensor. Local digitization of load cell signals enhances anti-interference capability, allows for long-distance transmission, and greatly improves the accuracy and reliability of the belt scale system.
Technical Advantage 4: High-Precision Speed Measurement Device
Utilizes an overhead PLR-12RS speed measurement device, consisting of a speed sensor and a dual-sided measuring wheel. It measures the actual belt speed at the weighing section directly on the underside of the top belt. The overhead dual-sided wheel is driven by friction, and its large dual-flange structure ensures minimal speed measurement error. The speed sensor converts rotation into pulse signals sent to the integrator, with pulse frequency proportional to belt speed. It has an IP65 protection rating, is suitable for speeds from 0.1 m/s to 4 m/s, and offers advantages like adaptability to wide belts, high speeds, and compatibility with dust explosion-proof requirements.
Technical Parameters
Item |
Parameter Range |
|---|---|
Flow Rate Range |
30 - 8000 t/h |
Material Test Error |
Number of idlers n=16; ≤ 0.1% (Initial Verification); ≤ 0.2% (In-service) |
Number of Load Cells |
16 |
Effective Weighing Length |
L × n (L: Idler spacing) |
Belt Width |
500 - 2400 mm |
Belt Speed |
0.5 - 5 m/s |
Conveyor Model |
TD75, DTII, or other standard/non-standard types |
Communication Protocol |
Standard MODBUS, PROFIBUS, TCP/IP |
Communication Interface |
RS-485, RS-232, Ethernet |
The Saimo ICS-FH-16 high-precision electronic belt scale has a dynamic cumulative error of approximately ±0.1%. It is suitable for applications with extremely high weighing accuracy requirements, particularly for scenarios such as incoming coal measurement in thermal power plants, ship loading/unloading measurement in ports, inter-plant measurement in steel mills, and various foreign trade settlements.
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