Wireless instrument for electric bicycle

The utility model belongs to the technical field of measuring devices and particularly relates to a wireless instrument for an electric bicycle. The wireless instrument is characterized by comprising a rotational speed acquisition device and a display device, wherein the rotational speed acquisition device comprises a first single-chip microcomputer, an outer interrupt pin of the first single-chip microcomputer is connected with a magnetic sensor, and a first wireless communication module is arranged on the first single-chip microcomputer; the display device comprises a second single-chip microcomputer connected with a second wireless communication module which can realize data transmission with the first wireless communication module, the second single-chip microcomputer is provided with a data display screen, and a power supply module is arranged on each of the first single-chip microcomputer and the second single-chip microcomputer. The wireless instrument has the advantages that when the bicycle adopting the wireless instrument does not move, the single-chip microcomputers are originally in the sleeping state, the rotational speed acquisition device does not work, and accordingly, the power consumption is extremely low; when the bicycle starts to move, the first single-chip microcomputer enters the normal working state after detecting a level jump, accordingly, the power consumption is reduced, the electricity consumption is lowered and the service life of the power supply modules is prolonged.