The invention relates to the technical field of dental image shooting, and discloses a
label-based intelligent positioning method and device, a positioner and a
ray machine, and the method comprises the steps: collecting response signals of a plurality of induction labels of an imaging sensor aiming at a
signal transmitted by a
label positioner arranged on the
ray machine, and receiving
signal intensity and
carrier phase information; the method comprises the following steps: estimating an estimated distance for any induction tag by fusing a
linear relationship between an attenuation model of received
signal strength and a
carrier phase, and eliminating a single tag error by utilizing multi-point sampling in combination with the estimated distance and position information of all the induction tags and a position offset generated by a positioning imaging sensor relative to a
ray machine, so as to realize submillimeter-level accurate positioning. The alignment accuracy and efficiency of the two are improved, so that the position is accurate when the dental X image is shot, and the imaging sensor is ensured to completely fall into the range of the projection area; the device is flexible in installation, low in cost, small in
angle dependence, and suitable for low-power-consumption scenes where the size of the sensor in the
oral cavity is limited and no independent power supply exists.