Aiming at the high pressure environment test of the new concept gun barrel bore with various temperatures

virbrations

collisions

elec tromagnetic interferences(EMI)

and testing technology at present

especially th e poor adaptability of the high pressure sensor

a coil piezoresistive transient high-pressure sensor with a new structure was proposed

which included two pre ssure feeling coils and two compensating coils

they were insulated from the hul l of the sensor to form the half bridge working mode(double arms)

and at the sa me time

the shield system for anti-EMI was built up through the union of many shield designs.This structure could not only improve the sensitivity

but also resist any interferences by the way of protection and compensation.Tests show t hat the sensor' s nonlinearity error is not higher than 0.3% in high

low and r oom temperature states

the repeatability error is not higher than 0.5%.