Passive wireless temperature measuring device of switch cabinet

The utility model discloses a passive wireless temperature measuring device of a switch cabinet, comprising a temperature sensor, a single chip microcomputer and an acquisition unit, wherein the acquisition unit is connected with the single chip microcomputer by an antenna, a radio-frequency transmitting circuit and a radio-frequency receiving circuit; the acquisition unit is connected with a temperature display by a communication cable; the single chip microcomputer is connected with the temperature sensor by a signal amplifying circuit, and is connected with a Farah capacitor which is connected with an energy collection circuit; and the energy collection circuit is respectively connected with the radio-frequency receiving circuit and a temperature difference ionization piece. The acquisition unit is connected with an external power supply. In the passive wireless temperature measuring device, the design is novel and unique, the structure is simple, the energy consumption is low, and an additional power supp