F2X70 Type

1 Introduction

    Fiber Optic Gyroscope, as a new type of full solid GYROSCOPE, has the advantages of starting fast, wide measurement, and high reliability. The F2X70 type is a dual-axis accuracy Fiber Optic Gyroscope instrument can be applied in the field of vehicle stability platforms, guides, and hanging warehouses.

1.1 Application range

   The instructions are only suitable for F2X70 products, including performance indicators, technical conditions, shape size and installation and use. Among them, 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 The main performance indicator of the product

Zero Drift stability	≤0.20 °/hr (1σ, 10s)	2h continuous test, 10ssmoothing results
stable schedule	<100s
Zero Drift repeatability	≤0.2 °/hr (1S)	3 Test data calculation results
Resolution	≤0.2 °/hr (1S)
Random Walk coefficient	≤0.02°/
FULL TEMPZERO DRIITPEPEATABILITY	≤ 0.5 °/hr
Scale Factor Non linearity	≤20 PPM (1S)	Room temperature
Scale Factor  repeatability	≤50 PPM (1S)	Room temperature
dynamic range	± 400 °/s
Bandwidth	≥500 Hz
Operating temperature	-40℃～+65℃
Storage temperature	-50℃～+70℃
Vibration condition	4.2G, 20Hz ~ 2000Hz

 

1.2.2 mechanics test

1.2.2.1 Sine scan vibration

GYROSCOPE is fixed on the vibration platform in the direction of vibration. Gyroscope is scanned in three directions, corresponding to the X -axis, Y axis, and Z axis. Vibration steps; vibration platform adds excitement, power the Gyroscope, and test the GYROSCOPE output value after a certain period of time (Gyroscope startup time), about 5 minutes; sine vibration. Vibration conditions: 20Hz-20000Hz, scanning time 5min, amplitude of 4.2g. During the vibration process, the Gyroscope output is recorded.

Random vibration                                            

Vibration frequency: 20Hz ~ 2000Hz

Vibration time: each axis is 5min respectively

Vibration direction: X, Y, Z axis

Vibration spectrum: see Figure 1

    Attachment 1 vibration spectrum

Index requirements:

Fiber Optic Gyroscope has no resonance in the range of 20Hz to 2000Hz.

Random vibration: Zero Drift value and front and rear Zero Drift average absolute value requirements are less than 0.3º/h.

1.2.2.2 Mechanical impact according to the requirements of Table 2.

                                                     Table 2 impact test condition

 During the impact process, the product is in a state of power. When the mechanical impact product is completed, it should be able to work normally. The zero change value before and after the impact is less than 0.3º/h.

2 communication protocol

2.1 Fiber Optic Gyroscope communication protocol

2.1 RS-422 method

a) Potter rate: 460.8K;

b) Data refresh rate: 2000Hz

c) Communication frame format

Each frame contains 9 bytes, the first byte is A5, and the second, third, and four -bytes are the high, middle and low data of GYROSCOPE in the horizontal direction. The 11th bit of the eighth byte is count, the counting range is 0 to 255, and the ninth byte is the sum of the first to eighth byte, and the low is 8 bits.

See Table 2 in the format, 11 digits per byte, and the order is: Starting position 1

8 digits of data bits (first sends low and then high), 1 bit of Qi school test, stop digit 1 bit

d) Communication rules

Gyroscope uses broadcast -type hair numbers

Table 3 Output Data Frame Each byte format

Number of bytes	significance	7	6	5th	4	3rd	Position 2	1	0
1	Frame head	1	0	1	0	0	1	0	1
2	Ping GYROSCOPE high 8 -bit	PD23	PD22	PD21	PD20	PD19	PD18	PD17	PD16
3	8 -bit in Gyroscope	PD15	PD14	PD13	PD12	Pd11	PD10	PD9	PD8
4	Ping GYROSCOPE low 8 -bit	PD7	PD6	PD5	PD4	PD3	PD2	PD1	PD0
5	Gyroscope high 8 -bit	CD23	CD22	CD21	CD20	CD19	CD18	CD17	CD16
6	8 -bit in gyroscope	CD15	CD14	CD13	CD12	CD11	CD10	CD9	CD8
7	Dagging Gyroscope low 8 -bit	CD7	CD6	CD5	CD4	CD3	CD2	CD1	CD0
8	count	C7	C6	C5	C4	C3	C2	C1	C0
9	Frame verification	1 to 8 bytes and low 8 -bit

3 Wiring definition

Gyroscope electrical interface uses the J30-15ZK connector. The node definition is shown in Table 4.

4 shape size map

Horizontal dual -axis Fiber Optic Gyroscope instrument Dimensions: 70mm × 70mm × 43mm, installation size: four -hole 62mm × 62 mm, installation screw: 4 M3 screws, the shape and installation size are shown in Figure 2.

                                                               Figure 2 F2X70 Type shape size diagram