Two-nozzle relative position measuring seat and measuring method

The invention discloses a two-nozzle relative position measuring seat which comprises a base and a circuit board embedded in the inner walls of four laterals sides, and one faces of exposed circuits of the circuit board are opposite to form a displacement electric-control limiting structure for a nozzle a or a nozzle b in four directions. Piezoelectric ceramic wafers are pasted on upper planes of the four lateral sides of the base and at a flat bottom of an inner concave cavity to form a stroke protection structure of a Z-axis descending nozzle. The invention further comprises a measuring method applying the two-nozzle relative position measuring seat. The method respectively measures position of the nozzle a or the nozzle b and includes: acquiring Z-axis coordinate value, and then measuring X-axis coordinates of the nozzle a or the nozzle b to acquire coordinates of the middle of the nozzle; using a same method to measure coordinates of two ends and the middle of Y axis and Z-axis coordinates to acquire spat