FIZOPTIKA www.fizoptika.ru
FIBER OPTIC ROTATION SENSOR VG951
DESCRIPTION (?), MANUAL (B), APPENDIXES (C)
CONTENTS
?. DESCRIPTION
1.INTRODUCTION2 GENERAL3.MAIN TECHNICAL PARAMETERS4.PRINCIPLE OF OPERATION5.ANALOG OUTPUT6.MAJOR PARTS AND COMPONENTS7.PRODUCTION TECHNIQUE8.ACCEPTANCE TESTB.MANUAL1.GENERAL2.FUNCTIONALCHECK3.INSTALLATION4.FUNCTIONING5.STORAGE
C. APPENDIXES1.CONNECTION DIAGRAM2.INSTALLATION DRAWING3.DIGITIZED OUTPUT4.TO READ MORE ABOUT FIZOPTIKA’S FIBER OPTIC GYROS
The interferometric sensor is the one where the optical path or phase difference in an interferometer is dependent on an external physical effect. The fiber optic gyro is the most important example where the rotation of the fiber loop results in a phase difference due to the relativistic Sagnac effect. High noise immunity in the presence of strong electric fields is an advantage of photons in a waveguide vs. electrons in a conductor. Polarization preserv-ing fiber is used extensively in interferometric arrangements to eliminate the effects of field rotation and polariza-tion state changes that occur in the fiber. Optical sensing assembly complemented by advanced processing elec-tronics provides superior stability and accuracy of the angular rate measurement.
?. DESCRIPTION
1. INTRODUCTION
VG951 (Fig.1) is a precise rotation sensor (fiber optic gyro - FOG). Based on a rela-tivistic optical effect it converts the absolute angular velocity into the output volt-age. The sensor comprises fiber optic open-loop “minimum configuration†sensing assembly and advanced analog processing electronics. An original model was de-veloped in 1995 to achieve a high grade industrial instrument at a low cost.
VG951 is a robust, reliable, maintenance-free electro-optical device. It offers all the advantages of the optical sensing technology and is capable to fit the most de-manding measurement and environmental requirements. The core of the sensor is made of quartz, hence it can tolerate wide temperature ranges and high levels of vibration and shocks. An extremely high sensitivity is complemented by the sen-sor’s immunity to electromagnetic interference eliminating the need for heavy shielding. VG951 outstanding performances open up new opportunities for modern systems and applications. VG951 is produced using an unique spliceless tech-nique when fiber optic components are fabricated in-line along the single fiber length. All the components are therefore naturally connected with no optical loss. The complex analog processing of the optical signal is performed by miniaturized electronic board fabricated in conventional surface mount technology (SMT). VG951 is being produced in analog (A) and digital (D) versions.
Fig. 1
VG951 appearance
2. GENERAL
VG951 is designed for industrial applications where accurate measurements and precise control (stabilization) of the angular rate are required. The output voltage of VG951 is proportional to the angular rate ? around the sensing axis. Proportionality coefficient is a scale factor (SF) of the sensor. VG951 weighs 700 g with the size of Ø150 mm ? 31 mm (without flanges and connector). It consumes single +5 Vdc powering. The sensor (A) is ready for meas-urements in 0.1 s after power-on.
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