Automatic inspection machine is a kind of medium-low speed, high-precision on-line checkweighing equipment, which can be integrated with various packaging production lines and conveyor systems to complete the measurement of product weight in the process of product conveying and compare the measured weight with the pre-set range, and then send out instructions from the controller to reject unqualified products or send products of different weight ranges to the designated area. Usually consists of conveyor belt, controller, inlet and outlet conveyor. Among them, the weighing conveyor completes the collection of weight signals and sends the weight signals to the controller for processing. The in-feed conveyor is used to ensure adequate spacing between products by increasing speed. The outfeed conveyor is used to transport the checked products out of the weighing area. It consists of a weighing conveyor, a controller and an infeed and outfeed conveyor. The weighing conveyor collects the weight signals and sends them to the controller for processing. The in-feed conveyor ensures adequate spacing between the products by increasing the speed. The outfeed conveyor is used to transport the checked products out of the weighing area.

The product enters the feeding conveyor, and the speed setting of the feeding conveyor is generally decided jointly according to the spacing of the products and the required speed. The purpose is to ensure that only one product can be on the weighing platform during the working process of the automatic inspection machine; when the product enters the weighing conveyor, the system recognizes that the product to be inspected enters the weighing zone according to external signals, such as photoelectric switch signals, or internal level signals. Depending on the speed of the weighing conveyor and the length of the conveyor, or on the level signal, the system can determine the time when the product leaves the weighing conveyor. From the time the product enters the weighing platform to the time it leaves the platform, the weighing module will detect the signal, the controller will select the signal in the stable agricultural area for processing, and then the weight of the product will be obtained; when the controller obtains the signal of the product's weight, the system will compare it with the pre-set weight range, and then the product will be sorted out, and the type of sorting will be different according to the different applications.