F98H type

1 Introduction

    Fiber optic gyroscope (FOG) as a new type of all-solid-state gyroscope, has the advantages of fast start-up, wide measuring range and high reliability. F98H single-axis FOG can be used in the application requirements of inertial navigation systems such as land-based positioning and orientation, vehicle-mounted north finder, airborne heading and marine compass.

1.1 Applicable Scope

   This manual is only applicable to F98H type products, including performance specifications, technical conditions, external dimensions and installation and operation.The technical conditions include the environmental range, electrical performance, and physical characteristics of the product.

1.2 Main parameters

1.2.1 fiber optic gyroscope instrument main performance indicators.

Table 1 Main performance index

	Type A	B type	Type C	Remarks
Zero stability °/hr(1σ,10s)	≤0.015	≤0.015	≤0.010
Zero stability °/hr(1σ,100s)	≤0.0065	≤0.0055	≤0.0045
Stability time (s)	＜10	＜10	＜10
Room temp zero drift  repeatability ° /hr(1σ)	≤0.015	≤0.015	≤0.010
Full temp zero drift  repeatability   (°/hr)	≤0.05	≤0.05	≤0.030
Random walk coefficient °/	≤0.002	≤0.001	≤0.001
Scale factor non-linearity ppm	≤10	≤10	≤10
Scale factor repeatability  ppm	≤20	≤10	≤10
Full temp scale factor    repeatability	≤200	≤100	≤50
dynamic range	±500°/s
Magnetic field sensitivity	≤0.020°/hr/Gs
Operating temperature	-40℃～+65℃
Storage temperature	-50℃～+70℃
Vibration condition	4.2 g,20 Hz～2000 Hz

 

1.2.2 Mechanical test

1.2.2.1 Mechanical test

The vibration conditions are as follows, and the vibration pattern is shown in Figure 1.1.
Vibration frequency: 5 Hz～500 Hz～5 Hz.

Vibration time: 15 min per axial direction.

vibration direction: X, Y and Z directions.

Vibration spectrum: as shown in Figure 1.1.

               Figure 1.1 Sweeping vibration spectrum

Random vibration for vehicle

Vibration frequency: 20Hz to 500Hz.

Vibration time: 15 min per axial direction.

vibration direction: X, Y and Z directions.

Vibration spectrum: as shown in Figure 1.2.

                       Figure 1.2 Random vibration spectrum for vehicles

Shock vibration

Shock conditions.

20 g, 11 ms half-sine, 3 shocks in 1 second in any direction of X, Y and Z.

2 Communication protocol

2.1 fiber optic gyroscope communication protocol

Communication protocols

2.1 RS-422 mode (bidirectional)

Bidirectional serial communication, in line with RS-422 interface standard.

External trigger signal, 10 to 2000 HZ square wave.

gyroscope valid data of 32 bits.

temperature valid data of 14 bits.

Data transmission baud rate of 460.800 kbps.

Data format.

Data transmission format: 11 bits per frame, including: the first bit is the start bit (0), the second to the ninth bit is the data bit, the tenth bit is the even parity bit, and the eleventh bit is the stop bit.

calibration mode: even parity.

gyroscope valid data is 32 bits (the highest bit is the sign bit, 0 is "+", 1 is "-"), the temperature valid data bit 14 bits (the highest bit is the sign bit, 0 is "+", 1 is "-").

Packet format: each transmission includes 10 bytes, the first byte is the frame header (80H); the second byte is the first byte of gyroscope data (low byte); the third byte is the second byte of gyroscope data; the fourth byte of gyroscope data; the fifth byte is the fourth byte of gyroscope data; the sixth byte is gyroscope fifth byte data (high byte); the seventh byte is the check bit, which is the XOR value of the first five bytes (gyroscope data) in the data packet; the eighth byte is the low byte of temperature data; the ninth byte is the high byte of temperature data; the tenth bit is the check bit, which is the XOR value of the first eight bytes (gyroscope data) in the data packet.

Data storage method.

                 Figure 2 Dimensional drawing of IXZ-F98H model

The fiber optic gyroscope instrument leads to the external J30-15ZKP socket, and the definition of the contact point is shown in Table 1.

Table 1 gyroscope output socket electrical characteristics

 

J30-15ZK	Definition	Remarks
5、13	PSU+5V	gyroscope power supply PSU
6、7	GND
8	PSU-5V
3	R+	gyroscope receive 422
4	R-	gyroscope receive 422
1	T+	gyroscope transmits 422
2	T-	gyroscope transmits 422