Introduction
LKF-F2X70 is an inertial angular rate sensor based on the optical Sagnac effect, which is used to measure the angular rate of the carrier along the sensitive axis of the product. The angular rate sensing unit of this product is an optical fiber coil and a digital closed-loop detection circuit is used to extract the optical path difference of the optical fiber coil sensitive to the clockwise and counterclockwise propagation light caused by the external physical angular velocity, and at the same time, the optical path difference signal is converted into a voltage signal. Closed-loop feedback and control realize signal modulation and demodulation, and achieve the purpose of high-precision angular velocity signal detection.
By reducing the outer diameter of fiber to 135μm,Thin PM fiber solution decreases extremely the size of fiber coils and delivers outstanding precision performance in fiber coils, which is applied for miniaturization of FOGs. And, the coils are wound precisely through quadrupole symmetry method.The miniatured fiber optic gyros have excellent advantages of compact and cost-effective, and are easy to integrate and ideal for UAV, photoelectric pod, optical platform, and so on.
Table 1 Performance parameters of LKF-F2X70 dual-axis FOG
| Bias Stability | ≤0.20°/hr (1σ,10s) | 2h continuous testing, 10s smoothing results |
| Stabilization Time | <100s | |
| Bias Repeatability | ≤0.2°/hr (1σ) | Calculated results of 3 test data |
| Resolution | ≤0.2°/hr (1σ) | |
| Random Walk Factor | ≤0.02°/ | |
| Bias Repeatability at Full Temperature | ≤0.5°/hr | |
| Scale Factor Nonlinearity | ≤20 ppm(1σ) | Room temperature |
| Scale Factor Repeatability | ≤50 ppm(1σ) | Room temperature |
| Dynamic Range | ±400°/s | |
| Bandwidth | ≥500 Hz | |
| Operating Temperature | -40℃～+65℃ | |
| Storage Temperature | -50℃～+70℃ | |
| Vibration Condition | 4.2g,20Hz～2000Hz | |
Table 2 The Electrical Interface Of The Gyroscope Uses J30-15ZK Connecto
| Pin | Pin Definition | Sign | Wire Color |
| 1 | Serial port T+ | TX+ | Yellow |
| 2 | Serial port T- | TX- | Orange |
| 3 | Serial port R+ | RX+ | Blue |
| 4 | Serial port R- | RX- | Green |
| 5,13 | Power +5V | +5V | Red |
| 6,7 | Power GROUND | GND | Black |
Main Features
High Degree of Engineering, Highly Cost-Effective
Pure Solid-State Design with Strong Environmental Adaptability
Long Life and High Reliability, MTBF 20000h
Single Power Supply (+ 5V), Simplify System Design
Full Digital RS-422 Electrical Interface Output
Application
Photoelectric Pod / Flight Control Platform
Inertial Measurement Unit
Surveying and Mapping, Track Inertial Navigation Line Detection
Platform Stabilization Device, Mobile Communication
Fig. 1 Dimensions of the external structure 
