0.1deg north seeking accuracy sensor fiber north finding sensor
Environmental requirements
1) Working temperature: -40℃～+65℃;
2) Storage temperature: -45℃～+70℃.
3) Sand and dust: Under the sand and dust conditions specified in Article 2 of GJB150.12, the following conditions shall not occur in the fiber optic gyroscope north finder:
a. The organization is too tight, stuck or malfunctioning;
b. Electrical components are short-circuited or cannot work normally;
c. The internal mechanical parts are dusty.
4) Salt fog
The fiber optic gyroscope north finder should meet the salt spray conditions of GJB150.11.
5) Humid and hot environmental conditions
Relative humidity: 95%; temperature: 30±2C; storage time 72 hours.
The insulation resistance should not be less than 2 MΩ, the metal surface should not be corroded, and the coating should not be blistered or peeled off, and it can work normally.
6) Vibration environment
Sinusoidal scanning vibration environment requirements
Frequency range: 5Hz~5.5Hz, vibration displacement (double amplitude) 25.4mm
Frequency range: 5.5Hz~200Hz, vibration acceleration 1.5g;
Scan time: 12min;
Vibration direction: 3 axes (X axis, Y axis, Z axis);
Each axis: 2h;
7) Impact environmental conditions
Impact waveform: half-sine pulse
Peak acceleration: 20g, pulse width 11ms,
Number of impacts per axis (X-axis, Y-axis, Z-axis): 3
8) Crash environmental conditions
Peak acceleration: 10g
Pulse width: 16ms
Collision rate: vertical axis 80 times/min
Collision times: 1000±10 times
Collision direction: vertical installation plane
9) Environmental requirements for sports cars
The road sports car has a mileage of 500 km. in:
Dirt road and gravel road: The speed is 20-30 km/h, 300 km.
Asphalt road and concrete road: the vehicle speed is 30-40 km/h, 200 km.
10) Electromagnetic compatibility
The electromagnetic compatibility refers to the relevant requirements of GJB151A-97 "Electromagnetic Emission and Sensitivity Requirements for Military Equipment and Subsystems".
11) Magnetic field
The performance characteristics of the gyro north finder under the condition of the magnetic induction intensity of (3±0.5)×10-4T should meet the technical index requirements.
Electrical performance
1) Insulation resistance
The insulation resistance between the independent circuits of the gyro north finder, and between the circuit and the housing should not be less than 100 MΩ under standard atmospheric conditions.
| Main technical parameters | ||
| Parameters | FNF701 | Unit |
| North seeking accuracy (1σ) | ≤0.1 | ° |
| North seek time | ≤ 3 | min |
| Horizontal accuracy (pitch and roll) | ≤0.05 (1σ) | ° |
| Circular linearity (1σ) | ≤0.1 | ° |
| Power-on preparation time | 6 | min |
| interface | RS422 | / |
| Weight | <5.5 | Kg |
| Dimension | 150×170×172 | mm |
| Working mode |
After power on, it start self-test. After the self-test completed, it will response to the upper computer’s north seek command. And after north seeking, the north seeking result will be sent to upper computer. |
|
| Environment requirements | ||
| Operating temperature | -40 ~ +65 | ° C |
| Storage temperature | -45~ +70 | ° C |
| Relative humidity | 95 | % |
| Appearance | The metal surface shall not be rusted, and the coating shall not cause blistering or peeling. | |
| Electrical performance | ||
| Power supply | 24±4V | |
| Power consumption | <30W | |
| Insulation resistance |
The insulation resistance between the individual circuits of the gyro north finder and its circuit and housing shall be not less than 10 MΩ under standard atmospheric conditions. |
|
| maintainability | ||
| MTBF | ≥1000 | hrs |
| MTTR | ≤30 | min |
Dimension
External Interface
1.1.1 With 24V±4V power input.
1.1.2 With serial port output function, the serial port output is defined as follows:
The external communication port adopts the RS422 serial interface form, with 1 start bit, 8 data bits, 1 stop bit, no parity, and a baud rate of 9600bps. The data is in ASIC format.
