Shenzhen Fire Power Control Technology Co., LTD
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1. Principle of operation
The implementation of fiber optic gyroscopes is mainly based on the Sagnac theory: the Sagnac effect describes the interference phenomenon of light in a rotating reference system: when light propagates in a closed loop (e.g., a fiber optic ring) in the clockwise and counterclockwise directions, if the system is in a rotating state, the optical paths of the two beams of light show a small time difference, leading to a phase difference. This phase difference is proportional to the rotational angular velocity and can therefore be used to measure rotational motion. This is how fiber optic gyroscopes work.
2. Parameters
| Serial number | Test item | Unit | Technical requirements |
| 1 | Overall dimensions | mm | 50×50×32 |
| 2 | Start-up time | s | 3 |
| 3 | Zero bias | (°)/h | ≤1 |
| 4 | Zero bias stability at normal temperature (constant temperature) (10 s smooth) | (°)/h | ≤0.2 |
| 5 | Zero bias stability with temperature change (1 ℃/min variable temperature, 100 s smooth) | (°)/h | ≤0.5 |
| 6 | Zero-bias repeatability | (°)/h | ≤0.1 |
| 7 | Zero bias sensitivity | (°)/h/Gs | ≤0.5 |
| 8 | Random walk coefficient | (º)/h1/2 | ≤0.03 |
| 9 | Scale factor nonlinearity | ppm | ≤20 |
| 10 | Scale factor asymmetry | ppm | ≤5 |
| 11 | Scale factor repeatability | ppm | ≤10 |
| 12 | Threshold | (°)/h | ≤0.2 |
| 13 | Resolution | (°)/h | ≤0.2 |
| 14 | Bandwidth | Hz | ≥500 |
| 15 | Operating temperature | ℃ | -45～+70 |
| 16 | Storage temperature | ℃ | -55～+85 |
| 17 | Dynamic range | (°)/s | ±500 |
| 18 | Supply voltage | V | +5 |
| 19 | Normal temperature steady state power consumption | W | ≤2.5 |
| 20 | Full temperature steady state power consumption | W | ≤4 |
| 21 | Start the instantaneous current | A | <1.5 |
3. Characteristics compared to other types of gyroscopes
| Gyro Type | Key Benefits | Major Disadvantages |
| Fiber optic gyroscope(FOG) | High precision, no mechanical parts, anti-interference | Higher price |
| Ring laser gyroscope(RLG) | High accuracy for aerospace | Large size and high cost |
| Mechanical gyroscope(MG) | Traditional and reliable for low-end applications | Mechanical components are prone to wear and tear, high maintenance costs |
| MEMS gyro | Small size and low cost | Lower accuracy, susceptible to environmental factors |
4. High Accuracy and Stability
The fiber optic gyroscope adopts the advanced Sagnac effect detection technology, which provides high angular velocity measurement accuracy (up to 1°/h or less) and excellent zero-bias stability over long periods of time, ensuring that reliable navigation and attitude control data can still be provided in complex environments.
5. Production environments