Grain storage level detecting device on basis of single-bus converters for granary

The utility model discloses a grain storage level detecting device on the basis of single-bus converters for a granary. The grain storage level detecting device comprises a protocol converter, a plurality of measuring and controlling auxiliary units, a plurality of A/D (analog/digital) converters and a measuring and controlling circuit. The measuring and controlling auxiliary units are connected with the protocol converter, and the A/D converters and the measuring and controlling circuit are connected with the measuring and controlling auxiliary units. The measuring and controlling circuit is arranged on a side wall of the granary. The measuring and controlling circuit is provided with a plurality of switches K, and the switches are equidistantly distributed. One end of each switch is connected with a power source, and the other end of each switch is connected with a voltage acquisition input interface of the corresponding A/D converter. All the switches which are positioned below a level altitude can be switched on under the effect of the gravity of grains, information of different voltages in various switch states can be measured by the A/D converters, and accordingly storage position information of the grains can be judged. The grain storage level detecting device on the basis of the single-bus converters for the granary has the advantages of low cost, convenience in installation, easiness in implementation, low influence of granary site environments and the like, and has great popularization potential.