Multi-section radial circular runout detection system for spindle bar

The invention discloses a multi-section radial circular runout detection system for a spindle bar. The system comprises a detection box, wherein the detection box is equipped with a spindle bar driving assembly, the detection box is internally equipped with a spindle bar positioning assembly and a detection assembly, the spindle bar is arranged in a V-shaped groove of a positioning plate of the spindle bar positioning assembly and is driven by friction wheels of the spindle bar driving assembly, the detection assembly comprises a photoelectric sensor, an electric induction sensor and a detection lifting mechanism, the photoelectric sensor is mounted on the detection box and corresponds to one friction wheel of the spindle bar driving assembly, the electric induction sensor is mounted on adetection lifting mechanism and contacts with the spindle bar through the detection lifting mechanism for detection, the photoelectric sensor and the electric induction sensor are respectively used for uploading detection sig