Method and device for online in-situ measurement with single joint arm

The invention belongs to the field of technologies and instruments for mechanical quantity measurement and provides an online mechanical working measurement device which can detect influences on working caused by cutting tool wear, machine tool vibration, cutter-caused deformation, machine tool movement errors and the like. The technical scheme includes that the device for online in-situ measurement with a single joint arm comprises the joint arm, a measuring head revolved body, a measuring head, a z-direction moving component, an x-direction moving component, an error compensation system, a data processing and control computer and a motor, the method for the online in-situ measurement with the single joint arm is realized by the aid of the device, and a route plan of a measuring machine is formed according to requirements of measurement tasks and established mathematical models to complete measurement. The method and the device for the online in-situ measurement with the single joint arm are mainly applied to mechanical quantity measurement.