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With Jigang Group’s steel production capacity reaching 10 million tons, more than 20 million tons of raw materials and fuels were supplied to the plant, and 12 million tons of iron ore concentrate was received there, of which over 50% was transported to the plant by road. Due to the large number of suppliers supplying goods to the factory and the unstable quality, fake and substandard refined powder often makes its way in. Manual sampling is not only labor-intensive but also lacks representativeness. To this end, the company has installed new ZNQ-B type intelligent sampling machines at various road transport inspection points for the inspection of iron concentrate shipped by road upon arrival at the factory. 1 Hardware of the ZNQ-B type intelligent sampling control system: The ZNQ-B type intelligent sampling device is used to collect samples of clean coal and concentrate powder from transport vehicles; this device consists of a traveling mechanism for the crane, a lifting mechanism, a spiral sampling mechanism, and an electrical control unit. The hardware of the control system consists of a main control computer, a vehicle positioning system, a sampling control system, and a monitoring system. Figure 1 Schematic diagram of the connections and functions of the control box (1) Control system. The control system consists of 5 sub-control boxes, as shown in Figure 1. (2) Transfer box on the crane. The transfer box on the crane is a device that serves as a hub and converter for connecting various positioning and limit sensors on the crane to the sampling control box. The sampling control box on the overhead crane can perform various controls over the sampling machinery. (3) Installation of the camera. The camera is used for image monitoring in control systems, and is connected to the video card in the main computer. The camera should be installed above the sampling site, at a height sufficient to cover the entire area (when the length of the site is 20m, the camera should be placed at a height of 10m). (4) Installation of the infrared positioning system. 2 Automatic sampling process: The fully automatic sampling process for individual vehicles consists of two steps: vehicle positioning and one-key sampling. (1) Car positioning steps. The operator instructs the vehicle to stop at the sampling location and asks it to be turned off (this is very important). Once the car comes to a stop, the control system quickly measures its position and displays it on the computer screen. The operator determines the accuracy of the vehicle’s positioning by comparing images. If you feel the positioning is not good, click “Reposition”. (2) Single-key sampling step. After completing the vehicle positioning, click “Start Sampling”. This is the only action performed by the sampling operator during fully automatic sampling. After clicking “Start Sampling”, the control system automatically selects the sampling point location and completes the sampling process. The selection of sampling points is random, with every location within the carriage having an equal chance. The selection of sampling points varies from vehicle to vehicle. The selection of sampling points is irreversible; once chosen, sampling must be carried out at those points, and it is not possible to choose different ones. The sampling operator must closely monitor the sampling process; in the event of any abnormalities, the power supply on the \"Communication Control Box\" should be turned off first. After recording the abnormal phenomena, exit the control system software. 3 Economic Benefit Analysis The use of a fully automatic sampling machine for testing pulverized coal and refined coal transported by road **reduces the labor intensity, and since the sampling points are random, the representativeness of the samples obtained is improved. From its deployment in May 2005 to December of the same year, the fully automatic sampling machine took samples from 1,935 batches across 17,130 vehicles. It identified 12 batches totaling over 1,300 tons of substandard refined iron powder (of which 630 tons were returned on the spot and 713 tons were used at a lower grade). Additionally, it detected 300,000 tons of substandard refined iron powder supplied by 43 manufacturers in 160 batches (TFe