The F-P cavity sensor fabricated by laser thermal bonding technique has characteristics of large dynamic gauge range,low temperature sensitivity,high temperature resistance and long term operation stability. The pressure resolution of 0.03 MPa over the full scale from 0 to 30 MPa has been achieved. Solutions for some key problems in the downhole measurement have been proposed:by optimizing the structure of the F-P sensor the cross-sensitivity of temperature and pressure is effectively reduced;
The F-P cavity sensor fabricated by laser thermal bonding technique has characteristics of large dynamic gauge range,low temperature sensitivity,high temperature resistance and long term operation stability. The pressure resolution of 0.03 MPa over the full scale from 0 to 30 MPa has been achieved. Solutions for some key problems in the downhole measurement have been proposed:by optimizing the structure of the F-P sensor the cross-sensitivity of temperature and pressure is effectively reduced;
For adopting winding, the technical rectification cover as well as missile and rocket engine spray pipe and other light quality such as airplane radar cover, missile first awl and carrier rocket that made are high-strength, high temperature resistant, endure ablation, endure the property requirement concerning winding component that eroded with high speed is also higher and higher.
The control motors in the well traction robot require high temperature resistant, quick response, small volume and large power density. Because Coreless DC motors uses ironless-rotor, the inertia and inductance is very small, mechanical time constant is less than 28 milliseconds, several products can attain in less than 10 milliseconds.
For adopting winding, the technical rectification cover as well as missile and rocket engine spray pipe and other light quality such as airplane radar cover, missile first awl and carrier rocket that made are high-strength, high temperature resistant, endure ablation, endure the property requirement concerning winding component that eroded with high speed is also higher and higher.
The control motors in the well traction robot require high temperature resistant, quick response, small volume and large power density. Because Coreless DC motors uses ironless-rotor, the inertia and inductance is very small, mechanical time constant is less than 28 milliseconds, several products can attain in less than 10 milliseconds.
crosslinking caused a significant effect in improving high temperature resistance for the blend film with draw ratio of 20 in the case of irradiation doses less than 20 Mrad.
The rare earth metals (RE) in as material additives primarily improve the creep resistance, corrosion resistance and high temperature resistance of materials.
crosslinking caused a significant effect in improving high temperature resistance for the blend film with draw ratio of 20 in the case of irradiation doses less than 20 Mrad.
The rare earth metals (RE) in as material additives primarily improve the creep resistance, corrosion resistance and high temperature resistance of materials.
glutamicum (Brevibacterium lactofermentum) ATCC 13869 gene library into the temperature-sensitive Escherichia coli murE mutant and selecting temperature resistant clones.