Working principle of online checkweigher
The online checkweigher is also called an automatic checkweigher and a weight sorting scale. So what is the working principle of the online checkweigher? Today I will introduce to you. The online checkweigher machine is a medium-low-speed, high-precision online checkweighing equipment, which can be integrated with various packaging production lines and conveying systems. It is mainly used to check whether the product weight is qualified, whether there are missing parts in the package or the product weight archive. Online checkweighing has gradually become an indispensable link in modern industrial production, especially in the production process of food and pharmaceutical industries. The online checkweigher completes the measurement of the product weight during the conveying process of the product, and compares the measured weight with the preset range, and the controller sends an instruction to reject products with unqualified weights, or remove products with different weight ranges. The product is distributed to the designated area. The online checkweigher is generally produced by a weighing conveyor, a controller, and an in-out conveyor. The weight signal is collected on the weighing conveyor, and the weight signal is sent to the controller for processing. The feed conveyor mainly increases the speed to ensure sufficient spacing between products. The discharge conveyor is used to transport the tested products away from the weighing area. The working process of the online checkweigher is as follows: the weighing preparation product enters the feeding conveyor, and the speed setting of the feeding conveyor is generally determined by the distance between the products and the required speed. The purpose is to ensure that only one product can be on the weighing platform during the work process of the checkweigher. Weighing process When the product enters the weighing conveyor, the system recognizes that the product to be tested enters the weighing area according to external signals, such as photoelectric switch signals, or internal level signals. According to the operating speed of the weighing conveyor and the length of the conveyor, or according to the level signal, the system can determine the time when the product leaves the weighing conveyor. From the product entering the weighing platform to leaving the weighing platform, the load cell will detect the signal shown in the figure below, and the controller selects the signal from the stable agricultural area for processing, and the weight of the product can be obtained. Sorting process After the controller obtains the weight signal of the product, the system will compare with the preset weight range to sort the product. The sorting type will be different according to the application. There are mainly the following types: 1 Rejection of unqualified products 2. Eliminate overweight and underweight separately, or transport to different places 3. According to different weight ranges, they are divided into different weight categories. Report feedback. Checkweighers have weight signal feedback function. Usually set the quantity The average weight of the product is fed back to the controller of the packaging/filling/canning machine, and the controller will dynamically adjust the feeding amount to make the average weight of the product closer to the target value. In addition to the feedback function, the checkweigher can also provide a wealth of report functions, such as the number of packages in each zone, the total amount in each zone, the qualified quantity, the qualified total, the average, the standard deviation, and the total quantity and total accumulation. The online checkweigher can be applied to various industries, such as various industries such as food, medicine, chemical industry, beverage, plastic, rubber and so on.
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