FS50X Single-Axis Medium-Low Precision FOG

 

 

 

• EO Pod
• Flight Control Platform
• Optical/Photography Platform
• Platform Stabilization Device
• SatCom-on-the-Move
• Inertial Measurement Unit
• Lightweight UAV

 

 

The FS50X is a miniaturized fiber optic gyroscope that breaks through traditional FOG design with integrated circuit and optical path design. It is an ideal medium-low precision angular rate sensor for navigation and control, widely used in inertial measurement applications. Featuring compact size, light weight, low power consumption, and simple interface, it offers exceptional cost performance. Based on proven designs with engineering optimizations for mass production, it delivers outstanding value across inertial measurement and control fields.

 

 

Company is a high-tech enterprise with full closed-loop capabilities from fiber winding equipment and coil winding to FOGs, fiber/MEMS inertial products, IMU circuits, software, and test equipment. End-to-end process control enhances quality and reduces costs. Operating under ISO9001 with strict processes, the company ensures reliability and consistency. Using inertial devices and SINS technology, it provides UAVs with precise velocity, position, and attitude. The FS50X significantly improves INS performance, ideal for medium-low precision inertial navigation.

 

 

Parameter	A	B	C
Bias Stability (°/h ,1σ, 10s)	≤0.20	≤0.10	≤0.05
Stabilization Time (s)	＜10	＜10	＜10
Bias Repeatability (°/h ,1σ)	≤0.30	≤0.20	≤0.10
Full-Temperature Bias Repeatability (°/h)	≤0.6	≤0.4	≤0.3
Angle Random Walk (ARW) (°/√h)	≤0.02	≤0.02	≤0.01
Scale Factor Nonlinearity (ppm)	≤50	≤30	≤20
Scale Factor Repeatability (ppm)	≤50	≤30	≤30
Dynamic Range (°/s)	±500
Magnetic Sensitivity (°/hr/Gs)	≤0.05
Operating Temperature (℃)	-40～+70
Storage Temperature (℃)	-50～+70
Vibration Condition (g, Hz)	4.2, 20～2000
Weight (g)	100±10
Dimensions (mm)	50*50*25

 

 

 

 

 

1.2.2 Mechanical Testing

1.2.2.1 Sinusoidal Scanning Vibration

The gyro is fixed on the vibration table through the fixture according to the direction of vibration, and the gyroscope carries out sinusoidal scanning in 3 directions, corresponding to the X-axis, Y-axis, and Z-axis directions, respectively. Vibration steps; vibration table plus excitation, to the gyroscope power, after a certain period of warm-up (gyro start-up time), test the output value of the gyroscope, about 5min; sinusoidal vibration. Vibration conditions: 20Hz-2000Hz, scanning time 5min, amplitude 4.2g. vibration process, record the gyroscope output.

Random Vibration

Vibration Frequency: 20Hz~2000Hz

Vibration Time: 5min for each axis

Vibration Direction: X, Y, Z axis

Vibration Spectrum: see Figure 1

Figure. 1 Vibration Spectrum

 

 

Fiber optic gyro shall be no resonance with sinusoidal scanning in the range of 20 HZ to 2000 Hz;

Random vibration: the absolute value of the bias in the vibration and the average bias before and after the vibration shall be less than 0.3º/h.

 

1.2.2.2 Mechanical shocks are as required by Table 2.

Table 2 Impact test conditions

Peak Acceleration (g)	30
Duration (ms)	10
Times of Impacts	3 times in each direction
Waveform	half-sine wave
Directions	X, Y, Z
Note: The interval between two impacts is not less than 1.5s.

Impact process, the product should be able to work normally after mechanical impacts in the state of electricity, the bias should be less than 0.2º/h before and after the impact.

 

2 Communication Protocol

2.1 RS-422 method (two-way)

Two-way serial communication, compliant with RS-422 interface standard;

External trigger signal, 1000 Hz square wave;

After the gyro detects the falling edge of the external trigger signal, it starts sending data outward;

The effective gyro data is 32 bits;

The valid data for temperature is 14 bits;

The data transfer baud rate is 460.8kbps;

Data format:

Data transmission format: each frame data is 11 bits, including: bit 1 is the start bit (0), bits 2 to 9 are data bits, bit 10 is the even parity bit, and bit 11 is the stop bit;

Parity check: even;

Gyro valid data for 32 bits (the highest bit for the sign bit, 0 for "+", 1 for "-"), temperature valid data bit 14 bits (the highest bit for the sign bit, 0 for "+", 1 for "-"); the temperature valid data bit 14 bits (the highest bit for the sign bit, 0 for "+", 1 for "-"). ", 1 for "-");

Packet format: each transmission includes a total of 10 bytes, the first byte for the frame header (80H); the second byte for the first byte of gyro data (low byte); the third byte for the second byte of gyro data; the fourth byte for the third byte of gyro data; the fifth byte for the fourth byte of gyro data; the sixth byte for the fifth byte of gyro data (high byte); the seventh byte is the parity bit for the packet for the first five byte (gyro data) of the XOR value; the 8th byte is the low byte of temperature data; the 9th byte is the high byte of temperature data; the 10th bit is the parity bit, which is the XOR value of the first 8 bytes (gyro data) in the data packet;

Data storage method.

Fig. 2 Dimension of FS50X

 

The J30-15ZK outlet is defined in Table 1.

Table 1 Electrical Characteristics of Gyro Output Socket

Pin	Pin Definition	Mark	Color
1	Serial port: Transmit+	TX+ (gyro signal +)	Yellow
2	Serial port: Transmit-	TX- (gyro signal -)	Orange
3	Serial port: Receive+	RX+ (external sync signal +)	Blue
4	Serial port: Receive-	RX- (external sync signal -)	Green
5, 13	Power +5V	+5V	Red
6, 7	GND	GND	Black

 

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