Abstract: A vending machine (100) and a vending method and vending system (1000) therefor, the vending machine (100) comprising a machine body (10), a door body (20), and at least one layer of shelves (30) and a weighing device (40) that are installed inside the machine body (10). The vending method comprises: collecting the weight of products on a shelf before and after vending (S1); calculating the difference of the change between the weight of the products on the shelf before vending and the weight of the products on the shelf after vending (S2); and if the difference of the change is less than a first weight change threshold, issuing an alarm prompt (S3), wherein the first weight change threshold is less than or equal to zero. Using the present invention may promptly determine the misplacement and replacement of the products without relying on an RFID tag.

Abstract: A self-service vending device and a vending method thereof, and a self-service vending system. The self-service vending device includes: a device body, a door, at least one shelf mounted in the device body, a weighing module, and a main control module. The weighing module comprises a micro-control unit and a weighing unit corresponding to each shelf. The micro-control unit and the weighing unit corresponding to each shelf are connected. The weighing unit is used for acquiring the weight of goods on the corresponding shelf. The main control module is separately connected to the micro-control unit provided on each shelf to obtain the weight information of goods on each shelf after the vending, thereby determining vending information according to the value of change in the weight of the goods on each shelf before and after the vending. Vending information is identified independently of RFID electronic tags, and thus the costs are low, and the present invention is easy to promote.

Abstract: A vending machine (100) and a vending method and vending system (1000) therefor, the vending machine (100) comprising a machine body (10), a door body (20), and at least one layer of shelves (30) and a weighing device (40) that are installed inside the machine body (10). The vending method comprises: collecting the weight of products on a shelf before and after vending (S1); calculating the difference of the change between the weight of the products on the shelf before vending and the weight of the products on the shelf after vending (S2); and if the difference of the change is less than a first weight change threshold, issuing an alarm prompt (S3), wherein the first weight change threshold is less than or equal to zero. Using the present invention may promptly determine the misplacement and replacement of the products without relying on an RFID tag.