Speed sensor

The utility model belongs to the technical field of rail transit equipment, and relates to a speed sensor, a main body structure comprises a base body, an inductive probe and a cable core, the inductive probe is arranged at the front end of the base body, the inductive probe is communicated with an anti-skid device host through the cable core, and the speed sensor can be suitable for environments with huge temperature difference and ice and snow coverage through model selection of components and parts. The inductive probe detects the change of level signals of a gear tooth crest and an internal circuit through the Hall sensor, square wave signals are generated after processing, the square wave signals are displayed outwards through the indicator lamp, signals are output to the anti-skid device host through the cable core, and due to the fact that the wheel diameter is known, the anti-skid device host can calculate the wheel speed, acceleration and deceleration and other parameters. Therefore, execution parts