CN201569441U

CN201569441U - Small optical fiber inertial navigation measuring device

Info

Publication number: CN201569441U
Application number: CN2009202274091U
Authority: CN
Inventors: 胡振林
Original assignee: STATE HONGFENG MACHINERY FACTORY
Current assignee: Hubei Sanjiang Aerospace Hongfeng Control Co Ltd
Priority date: 2009-08-11
Filing date: 2009-08-11
Publication date: 2010-09-01
Anticipated expiration: 2019-08-11

Abstract

The utility model relates to a small optical fiber inertial navigation measuring device, which comprises three frameless optical rings which are mutually orthogonal and nested, three small quartz flexible accelerometers, a body, a light source board, a main board, an I/F conversion board, a computer board, a coupler, a Y waveguide, a light source, an outer cover and a cable plug with an interface, and is characterized in that the structure of the three frameless optical rings which are mutually orthogonal and nested adopts a nested structure form; the I/F conversion board and the computer board are arranged on the body; the light source and the body are integrated together; and the three small quartz flexible accelerometers are arranged on three orthorhombic reference positions of the body, and correspond to the positions of the three frameless optical rings. The utility model has compact structure of the small inertial group, stable system performance and moderate accuracy, also has better environmental adaptation capacity, can bear various environmental test requirements born by the similar product, and can be widely applied to various fields of dual-use products.

Description

Miniaturization fiber-optic inertial navigation measurement mechanism

Technical field

The utility model belongs to be measured and navigation field, particularly a kind of miniaturization fiber-optic inertial navigation measurement mechanism.

Background technology

Widespread use along with the army and the people's products such as cruising missile, aerospace space flight, rocket satellite, submarine naval vessel and oil drilling measurements, to the demand of inertial navigation measuring technique more and more widely, technical feature requires more and more diversified, volume, weight require more and more littler, integrated, miniaturization, the microminiaturized group of being used to are designed to inevitablely, and the optical fiber of miniaturization is used to group just according to this Demand Design.

Inertial navigation measurement mechanism (being called for short " being used to group ") can be described as the brain of intelligence systems such as guided missile, rocket, naval vessel, and its performance has determined the overall performance of product.The general at present group of using of being used to comprises body, electronic box and secondary power supply etc.; Generally comprise Sensitive Apparatuses such as gyro and accelerometer on the body, for the different accuracy grade be used to organize body, the accuracy requirement of gyro is different, volume difference is also bigger, generally selects for use around property gyro and quartz flexible accelerometer etc. as Sensitive Apparatus; Configuration I/F conversion and computing machine and temperature control circuit etc. in the electronic box; Secondary power supply provides system required power supply, connects to form one by cable between the three and is used to group system, and the volume of this system is huge usually, and it is big to take up room, and quality is heavy.

Summary of the invention

The purpose of this utility model provide a kind of with exoskeletal optical fibre gyro and miniaturization quartz flexible accelerometer as the Sensitive Apparatus of being used to organize, with power panel, computing machine plate and integrated being installed on the body such as control panel and light source board, guarantee that small product size is little, in light weight, external interface is simple, and have adaptives capacity to environment such as very high anti-vibration, impact, system accuracy is moderate, satisfies the miniaturization fiber-optic inertial navigation measurement mechanism in multi-usage place.

To achieve these goals, the utility model comprises three mutually orthogonal and nested exoskeletal fiber optic loop (X to fiber optic loop, Y to fiber optic loop, Z to fiber optic loop), three miniaturization quartz flexible accelerometers, be used to install each optical device and according to the optical fibre gyro Demand Design body of complete light path, light source board, mainboard, I/F converter plate, computing machine plate, coupling mechanism, Y waveguide, light source, outer cover, and the cable plug of external interface, be characterized in: the structure of three mutually orthogonal and nested exoskeletal fiber optic loop adopts the nested configuration form; I/F converter plate, computing machine plate are installed in above the body; The Lights section and body are integrated; Three miniaturization quartz flexible accelerometers are installed in the reference position of three quadratures of body, and are corresponding with three exoskeletal fiber optic loop positions.

The utility model miniaturization is used to organize compact conformation, and system performance is stable, and moderate accuracy has adaptive capacity to environment preferably simultaneously, can bear the various environmental test requirements that similar products bear, and can be widely used in each field of the army and the people's product.

Description of drawings

Fig. 1 is the utility model structure cut-open view I.

Fig. 2 is the utility model structure cut-open view II.

Fig. 3 is the utility model topology layout elevation drawing I.

Fig. 4 is the utility model group topology layout elevation drawing II.

Fig. 5 is that the exoskeletal ring body of the utility model is arranged synoptic diagram.

Among the figure: 1-I/F converter plate, 2-computing machine plate, 3-outer cover, 4-cable clip, 5-external cable, 6-body, 7,2 * 2 fiber couplers, 8-pressing plate, the exoskeletal fiber optic loop of 9-, 10-gyro mainboard, 11-1 * 3 fiber couplers, 12.-Y waveguide, 13-SLD light source, 14-light source driving board, 15-quartz flexible accelerometer.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

The utility model comprises: three mutually orthogonal and nested exoskeletal fiber optic loop (X to fiber optic loop, Y to fiber optic loop, Z to fiber optic loop), three miniaturization quartz flexible accelerometers, be used to install each optical device and according to the optical fibre gyro Demand Design body of complete light path, light source board, mainboard, I/F converter plate, computing machine plate, coupling mechanism, Y waveguide, light source, outer cover, and the cable plug of external interface.Wherein, the structural design of three mutually orthogonal and nested exoskeletal fiber optic loop is a kind of new design idea, adopts the nested configuration form first, saves structure space and architecture quality greatly; The structure that I/F converter plate, computing machine plate are installed in above the body has made full use of the structure space on the body, reduce intermediate link and mutual stube cable, reduced unnecessary structural member equally, reduced product weight, the assurance total is compact to design, the space availability ratio height; And integrated light path design and highly integrated topology layout integrate the Lights section and body, have shortened the path that optical fiber connects, and help the welding of light source tail optical fiber and each optical device tail optical fiber; Reasonably the layout of optical device more helps the coiling of optical fiber, and the assurance and the raising of the precision of optical fibre gyro had very great help, and more helps being used to the assurance and the raising of the precision of group system; Three miniaturization quartz flexible accelerometers are installed in the reference position of three quadratures of body, corresponding with three exoskeletal fiber optic loop positions, make full use of structure space, guaranteed that the measuring basis of being used to organize is unified, helped improving the precision stability and the measurement accuracy of being used to organize.

The utility model is installed on the motion carrier pedestals such as automatic torpedo, guided missile or bullet train, this device was started working synchronously when motion carrier started.Principle of work of the present utility model is: the three axis optical fibre gyro during optical fiber is used to organize utilizes three axial angular velocity of Sagnac effect sensitive carrier---and the SLD light source that at first drives sequence number 13 by the light source driving board of sequence number 14 sends 1 * 3 fiber coupler of a branch of light by sequence number 11 and is divided into three-beam, after each bundle light is divided into two-beam through the Y waveguide of 2 * 2 fiber couplers of the supporting sequence number 7 of place fiber optic loop and sequence number 12 respectively, be coupled into fiber optic loop from the exoskeletal fiber optic loop two ends of sequence number 9, penetrate around fiber optic loop operation back in opposite direction, and produce interference; When fiber optic loop is in when static, the optical path difference of two-beam is zero, when fiber optic loop is rotated with angular speed ω, then produces the Sagnac effect, the optical path difference of two-beam is non-vanishing, and the photodetector on the sequence number 10 gyro mainboards converts the light signal of output to electric signal and output.Three axial apparent accelerations of the responsive motion carrier of sequence number 15 quartz flexible accelerometers that three quadratures during optical fiber is used to organize are installed, the dc current signal of its output is through the I/F converter plate change-over circuit of sequence number 1, when making quartz flexible accelerometer form closed loop work, convert the current signal of its output to pulse signal; Above-said current signal is resolved by the computing machine plate of sequence number 2 again, finally outwards export the parameters such as instant orientation, movement velocity, athletic posture of this motion carrier by the external cable of sequence number 5, the control by the principal computer on the motion carrier reaches the measurement of motion carrier athletic posture, the purpose of navigation.

The content that is not described in detail in this instructions belongs to this area professional and technical personnel's known prior art.

Claims

1. miniaturization fiber-optic inertial navigation measurement mechanism, comprise three mutually orthogonal and nested exoskeletal fiber optic loop, three miniaturization quartz flexible accelerometers, be used to install each optical device and according to the optical fibre gyro Demand Design body of complete light path, light source board, mainboard, I/F converter plate, computing machine plate, coupling mechanism, Y waveguide, light source, outer cover, and the cable plug of external interface, it is characterized in that: the structure of three mutually orthogonal and nested exoskeletal fiber optic loop adopts the nested configuration form; I/F converter plate, computing machine plate are installed in above the body; The Lights section and body are integrated; Three miniaturization quartz flexible accelerometers are installed in the reference position of three quadratures of body, and are corresponding with three exoskeletal fiber optic loop positions.