Abstract: An automatic vending machine includes a cabinet, a plurality of item columns, a pickup port and a delivery apparatus, and the delivery apparatus includes a hopper and a hopper drive mechanism. An item dispensing method of the automatic vending machine includes: determining, according to items to be purchased, all of item combination manners having a lowest number of item dispensing operations as candidate item combination manners; determining all of pickup manners for picking up items in each of the candidate item combination manners; determining all of item dispensing paths in one-to-one correspondence to all of pickup manners of all of the candidate item combination manners; and selecting, from all of the item dispensing paths, an item dispensing path having a highest efficiency as a target item dispensing path, and controlling, based on the target item dispensing path, the hopper to dispense items.

Abstract: An automatic vending machine includes a cabinet, a plurality of item columns, a pickup port and a delivery apparatus, and the delivery apparatus includes a hopper and a hopper drive mechanism. An item dispensing method of the automatic vending machine includes: determining, according to items to be purchased, all of item combination manners having a lowest number of item dispensing operations as candidate item combination manners; determining all of pickup manners for picking up items in each of the candidate item combination manners; determining all of item dispensing paths in one-to-one correspondence to all of pickup manners of all of the candidate item combination manners; and selecting, from all of the item dispensing paths, an item dispensing path having a highest efficiency as a target item dispensing path, and controlling, based on the target item dispensing path, the hopper to dispense items.

Abstract: Disclosed are a vending machine and a method of detecting height of a storage column. The vending machine may determine whether a sensor squarely faces the front end surface of the level plate of a storage column by detecting the type of an output signal of the sensor. When the sensor squarely faces the front end surface of the level plate of the storage column, the height of the level plate of the storage column may be obtained based on a height difference between the sensor and the bearing surface of a bucket and the height of the bucket. Thus, according to the height of the level plate of the storage column, the bearing surface of the bucket and the upper edge of the front end surface of the level plate of the storage column lie in the same level when dispensing an item.

Abstract: Disclosed are a vending machine and a method of detecting height of a storage column. The vending machine may determine whether a sensor squarely faces the front end surface of the level plate of a storage column by detecting the type of an output signal of the sensor. When the sensor squarely faces the front end surface of the level plate of the storage column, the height of the level plate of the storage column may be obtained based on a height difference between the sensor and the bearing surface of a bucket and the height of the bucket. Thus, according to the height of the level plate of the storage column, the bearing surface of the bucket and the upper edge of the front end surface of the level plate of the storage column lie in the same level when dispensing an item.

Abstract: Deoxygenation catalyst for coal mine methane, its preparation method and application in catalytic deoxygenation of coal mine methane in oxygen-containing environment. The catalyst comprises a first composition serving as the active content and a second composition serving as the additive. The first composition consists of one or more platinum group noble metals selecting from the group consisting of Pd, Pt, Ru, Rh and Ir. The second composition consists of one or more alkaline metals or alkaline earth metals selected from the group consisting of Na2O, K2O, MgO, CaO, SrO and BaO; CeO2 and lanthanides rare earth metals such as Pr, Nd, Sm, Eu, Gd, etc.; and/or transition metals such as Y, Zr, La, etc.; and/or Al2O3 oxides complexes. Said catalyst can effectively eliminate the oscillatory behavior during catalytic combustion under oxyen-lean condition.