CN104537824A - Single-axial rotation inertial navigation signal transmission device and single-axial rotation inertial navigation signal transmission method - Google Patents
Single-axial rotation inertial navigation signal transmission device and single-axial rotation inertial navigation signal transmission method Download PDFInfo
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- CN104537824A CN104537824A CN201410415084.5A CN201410415084A CN104537824A CN 104537824 A CN104537824 A CN 104537824A CN 201410415084 A CN201410415084 A CN 201410415084A CN 104537824 A CN104537824 A CN 104537824A
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Abstract
The invention provides a single-axial rotation inertial navigation signal transmission device, which has signal conversion modules disposed at both a fixed end and a rotating end of a rotation inertial navigation system; the signal conversion module at the fixed end is connected with the signal conversion module at the rotating end in a wireless optical communication manner; each signal conversion module is provided with an electric/optical conversion unit and an optical/electric conversion unit to realize mutual conversion between optical signals and electric signals. The invention also provides a single-axial rotation inertial navigation signal transmission method which comprises the following steps: S1, converting electric signals to be transmitted into optical signals; S2, transmitting the optical signals obtained by conversion in S1 between the fixed end and the rotating end in the rotation inertial navigation system in a wireless optical communication manner; S3, converting the optical signals obtained by transmission in S2 into electric signals. The technical scheme of the invention effectively prevents the phenomenon of equipment loss due to contact friction, and is strong in electromagnetic interference resistance, high in transmission speed, and wide in transmission frequency band width.
Description
Technical field
The present invention relates to Design of inertial navigation system technical field, particularly a kind of single-shaft-rotation inertial navigation signal transmitting device and single-shaft-rotation inertial navigation signal transmission method.
Background technology
In order to improve the precision of inertial navigation system, general employing rotates inertial navigation technique to compensate the impact of inertance element drift on navigation accuracy.This technology is equivalent to add in the outside of inertial navigation system rotate and control gear, and the constant value drift that inertance element is produced in a rotation period of inertial navigation system is cancelled out each other with the error produced of navigating.But generally adopt in this rotation inertial navigation technique at present in order to transmit power supply signal and data-signal conducting slip ring when rotated brush contact contact with ring body and produce and rub, thus the problems such as the life-span is low, electromagnetism interference is poor, Signal transmissions narrow bandwidth that cause adopting the Rotating Inertial Navigation System of this technology to have, more can not adapt to the needs of equipment development.
Summary of the invention
The object of the present invention is to provide a kind of wireless light communication that adopts to realize single-shaft-rotation inertial navigation signal transmitting device and the single-shaft-rotation inertial navigation signal transmission method of non-contacting Signal transmissions.
For solving the problem, the present invention proposes a kind of single-shaft-rotation inertial navigation signal transmitting device, and stiff end and the round end of Rotating Inertial Navigation System are provided with signal conversion module; The signal conversion module at described stiff end place and the signal conversion module at round end place are that wireless light communication is connected; Described signal conversion module is provided with electrical/optical converting unit and light/electric converting unit to realize the mutual conversion between light signal and electric signal.
Concrete, described signal conversion module converts electrical signals to light signal by described electrical/optical converting unit and transmits, and the light signal received is converted to electric signal by described light/electric converting unit by described signal conversion module.
Preferably, single-shaft-rotation inertial navigation signal transmitting device of the present invention also comprises emitting antenna and receiving antenna in order to launch light signal and to receive.
Preferably, described emitting antenna is arranged at described electrical/optical converting unit output terminal, and described emitting antenna comprises concavees lens, in order to beam expander, ensure that this light beam is launched with certain angle of divergence; Described receiving antenna is arranged at described light/electric converting unit input end, described receiving antenna comprises convex lens and optical filter, in order to gather the light beam received and filtering, described convex lens and optical filter can be set in turn in described light/electric converting unit input end, light beam planoconvex lens gather process after carry out filtering process by described optical filter.
Preferably, described signal conversion module also comprises FPGA unit, described FPGA unit is connected with described electrical/optical converting unit and light/electric converting unit respectively, in order to multi-channel electric signal be encoded to a road serial electric signal and be transferred to described electrical/optical converting unit, the road serial electric signal that described light/electric converting unit exports is encoded to multi-channel electric signal.
Preferably, described signal conversion module also comprises interface level converting unit, and described interface level converting unit is arranged at the input end of described FPGA unit in order to described multi-channel electric signal is converted to the receivable level format of described FPGA unit.
Preferably, described electrical/optical converting unit comprises level shifting circuit, drive circuit for laser and laser instrument, described level shifting circuit, drive circuit for laser and laser instrument connect successively, described level shifting circuit is arranged between described FPGA unit and drive circuit for laser in order to signal level to be converted in scope that two ends circuit port allows, by described drive circuit for laser the electric signal received amplified again and modulate, to ensure that described laser instrument is luminous according to modulated signal sequences, especially, described laser instrument can adopt semiconductor laser.
Preferably, described light/electric converting unit comprises photodetector, linear amplifier circuit, amplitude limiting amplifier circuit, clock data recovery circuit, described photodetector, linear amplifier circuit, amplitude limiting amplifier circuit, clock data recovery circuit connect successively, the Signal transmissions detected is given described linear amplifier circuit and is amplified by this signal by linear amplifier circuit by described photodetector, then is limited in the receivable scope of its circuit of output terminal by described amplitude limiting amplifier circuit.
Preferably, described linear amplifier circuit comprises the high multiple amplified for signal amplitude and amplifies electronic circuit and amplify electronic circuit for the low multiple of impedance matching and buffering, and preferred as one, described linear amplifier circuit adopts high-speed linear amplifier.
Preferably, single-shaft-rotation inertial navigation signal transmitting device of the present invention also comprises system clock, and described system clock is connected to control the inner sequential of this FPGA unit using as the synchronous base of encoding with FPGA unit.
Preferably, single-shaft-rotation inertial navigation signal transmitting device of the present invention also comprises internal electric source change-over circuit, and this design makes only to input the power supply that a direct current can realize inner each components and parts.
Present invention also offers a kind of single-shaft-rotation inertial navigation signal transmission method, the method comprises the following steps:
S1, electric signal waiting for transmission is converted to light signal;
S2, the light signal be converted in step S1 to be transmitted between the stiff end and round end of Rotating Inertial Navigation System by wireless light communication mode;
S3, be converted to electric signal by transmitting the light signal obtained in step S2.
Single-shaft-rotation inertial navigation signal transmitting device of the present invention and single-shaft-rotation inertial navigation signal transmission method adopt the signal transmission form of wireless light communication, take laser as signal vehicle, take airspace as transmission medium, effectively prevent the generation of the phenomenon of the equipment loss that contact friction may cause, have that electromagnetism interference is strong simultaneously, the advantage of the fast and transmission frequency bandwidth of transmission speed.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the signal transmitting apparatus in prior art in Rotating Inertial Navigation System.
Fig. 2 is the structural representation of single-shaft-rotation inertial navigation signal transmitting device of the present invention.
Fig. 3 is the optic path schematic diagram of single-shaft-rotation inertial navigation signal transmitting device of the present invention.
Fig. 4 is the schematic diagram of signal conversion module of the present invention.
Fig. 5 is the circuit diagram of electrical/optical converting unit of the present invention.
Fig. 6 is the circuit diagram of light of the present invention/electric converting unit.
Fig. 7 is the schematic diagram of single-shaft-rotation inertial navigation signal transmission method of the present invention.
Embodiment
With reference to the accompanying drawings embodiments of the invention are described.The element described in an accompanying drawing of the present invention or a kind of embodiment and feature can combine with the element shown in one or more other accompanying drawings or embodiment and feature.It should be noted that to know object, accompanying drawing and eliminate expression and the description of unrelated to the invention, parts known to persons of ordinary skill in the art and process in illustrating.
As shown in Figure 1, be the structural representation of the signal transmitting apparatus in Rotating Inertial Navigation System in prior art.Wherein, 1 is the navigational computer of Rotating Inertial Navigation System, and 2 is conducting slip ring, and 3 for rotating inertial navigation pre-process circuit.This conducting slip ring 2 and navigational computer 1 and rotate inertial navigation pre-process circuit 3 and be and be electrically connected and signal is connected.Concrete, conducting slip ring 2 is respectively with navigational computer 1 and rotate inertial navigation pre-process circuit 3 and be electrically connected with navigation computing machine 1 and rotate inertial navigation pre-process circuit 3 and power, in addition, conducting slip ring 2 is respectively with navigational computer 1 and rotate inertial navigation pre-process circuit 3 signal and be connected to realize navigational computer 1 and the data rotated between inertial navigation pre-process circuit 3 are transmitted.Conducting slip ring 2 can be rotated by the Power supply of outside, but constantly contacts with ring body and produce in rotary course center brush contact and rub, the problems such as inevitably generation time is low, electromagnetism interference is poor, Signal transmissions narrow bandwidth.
In order to realize close together and Signal transmissions between the mechanism relatively rotated under the prerequisite avoiding contact to rub, present invention employs the signal transmission form of wireless light communication, in order to realize this signal transmission form, the present invention is at the stiff end of Rotating Inertial Navigation System and the equal signalization modular converter of round end, and make the signal conversion module at stiff end place and the signal conversion module at round end place be that wireless light communication is connected, in addition, in this signal conversion module, electrical/optical converting unit and light/electric converting unit are all set to realize the mutual conversion between light signal and electric signal.Concrete, signal conversion module converts electrical signals to by electrical/optical converting unit the light signal converted back into electric signals that light signal carries out transmitting, being received by light/electric converting unit.
Concrete, as shown in Figure 2, for the structural representation of single-shaft-rotation inertial navigation signal transmitting device of the present invention, wherein, 4 for being arranged at the signal conversion module of the stiff end of Rotating Inertial Navigation System, i.e. fixed end signal modular converter, 5 for being arranged at the signal conversion module of the round end of Rotating Inertial Navigation System, i.e. round end signal conversion module.Fixed end signal modular converter 4 is connected with navigational computer 1, round end signal conversion module 5 is connected with rotation inertial navigation pre-process circuit 3, and navigational computer 1 and rotation inertial navigation pre-process circuit 3 realize data by the wireless light communication between fixed end signal modular converter 4 and round end signal conversion module 5 and transmit.
Preferred as one, in the present embodiment, fixed end signal modular converter 4 and round end signal conversion module 5 are all electrically connected to be powered by conducting slip ring 2 with conducting slip ring 2, further, navigational computer 1 and rotation inertial navigation pre-process circuit 3 are also all electrically connected to provide power supply by this conducting slip ring 2 to it with conducting slip ring 2.Only the power supply of conducting slip ring 2 is completed by external dc electricity, and the power supply of inner other components and parts each of this single-shaft-rotation inertial navigation signal transmitting device arranges internal electric source change-over circuit all according to actual needs to provide power supply.As, the present embodiment is just provided with inner integrated power supply chip and provides+3.3V ,+2.5V and+1.2V needed for FPGA unit 11 voltage by it ,+3.3V the voltage of light/electric converting unit 13 and electrical/optical converting unit 12, and photodetector negative terminal bias voltage.
As shown in Figure 3, for the optic path schematic diagram of single-shaft-rotation inertial navigation signal transmitting device of the present invention, wherein, 401 is stiff end receiving antenna, 402 is stiff end emitting antenna, 403 is stiff end light effective coverage, 404 is stiff end hot spot, 501 is round end receiving antenna, 502 is round end emitting antenna, 503 is round end light effective coverage, 504 is round end hot spot, 6 is the light beam launched via emitting antenna (the stiff end emitting antenna 402 namely in the present embodiment and round end emitting antenna 502), 7 is the airspace between fixed end signal modular converter 4 and round end signal conversion module 5, 8 is rotating shaft.Wireless light communication between fixed end signal modular converter 4 with round end signal conversion module 5 is connected laser as signal vehicle, the light velocity transmission of signal is realized in airspace 7 between above-mentioned two signal conversion module, not only speed is high, and transmission frequency bandwidth, information capacity are large.
As shown in Figure 4, be the schematic diagram of signal conversion module of the present invention, wherein, 10 is interface level converting unit, and 11 is FPGA unit, and 12 is electrical/optical converting unit, and 13 is light/electric converting unit, and 14 is emitting antenna, and 15 is receiving antenna, and 16 is system clock.Interface level converting unit 10 is arranged at the input end of FPGA unit 11 in order to multi-channel electric signal to be converted to the receivable level format of FPGA unit 11.FPGA unit 11 is connected with electrical/optical converting unit 12 and light/electric converting unit 13 respectively, in order to multi-channel electric signal be encoded to a road serial electric signal and be transferred to electrical/optical converting unit 12, the road serial electric signal that light/electric converting unit 13 exports is encoded to multi-channel electric signal.Emitting antenna 14 and receiving antenna 15 are respectively in order to launch light signal and to receive.System clock 16 is connected with FPGA unit 11 to control the inner sequential of this FPGA unit 11, as the synchronous base of coding.Above-mentioned FPGA unit 11 adopts hardware description language, the multi-channel electric signal of input is realized to encode by certain pattern rule, coding Hou Yi mono-road serial data stream presses the output of one one, bit position, output frequency can according to system clock 16 frequency or by system clock frequency division gained, simultaneously, FPGA unit 11 receives a road serial data signal and a road clock signal of light/electric converting unit 13 output, it regularly decoded and recover original signal, the clock of decoding is provided by clock data recovery circuit.As Fig. 4, the external input interface of this signal conversion module is designed to 2 road RS422,3 road RS232,3 road TTL and 1 road CAN, totally 9 tunnels, and external output interface is also designed to 2 road RS422,3 road RS232,3 road TTL and 1 road CAN, totally 9 tunnels, above-mentioned Interface design can meet the interface requirement of most of inertial navigation system, and above-mentioned interface will be connected with FPGA unit 11, all need conversion, therefore the pin of FPGA unit 11 is set to LVTTL level in the present embodiment, RS422 level turns LVTTL level and adopts DS26C32 to realize, LVTTL level turns RS422 level and adopts DS26C31 to realize, RS232 level turns LVTTL level and LVTTL level RS 232 level adopts MAX205 to realize, the conversion of Transistor-Transistor Logic level and LVTTL level adopts SN74ALVTH16245 to realize, CAN signal and LVTTL level conversion adopt SJA1050 to realize.System clock 16 adopts the active crystal oscillator of the high precision of 125MHz, carries out two divided-frequency in FPGA unit 11 inside, as the serial data output frequency after coding, i.e. and 62.5MHz.FPGA unit 11 of the present invention can adopt the FPGA device meeting arbitrarily circuit requirements, especially, in the present embodiment, this FPGA unit 11 adopt have that power is low, the XCS3S250 of the XILINX of the advantage of fast response time and peripheral components thereof.
This Fig. 4 is the fixed end signal modular converter 4 of the present embodiment or the schematic diagram of round end signal conversion module 5, and correspondingly, emitting antenna 14 is wherein stiff end emitting antenna 402 or round end emitting antenna 502.Emitting antenna 14 is arranged at the output terminal of electrical/optical converting unit 12, in order to the light beam sent is expanded, launch with certain angle of divergence, to ensure that enough luminous powers can arrive opposite end, then need the geometry loss as far as possible reducing luminous power, and rotate the spinning movement of inertial navigation, require that the hot spot that light is transmitted into opposite end covers emitting antenna 14 and receiving antenna 15 completely, when rotating and carrying out in any case, i.e. light effective coverage, just can ensure that opposite end receives light signal.Emitting antenna 14 adopts concavees lens in the present embodiment, in order to beam expander, to ensure that this light beam is launched with certain angle of divergence.If light is through concavees lens antenna with full-shape 30 ° transmitting, transmission range is 30mm, and spot diameter D is calculated as follows:
D＝2Ltg25°.......................................................(1)
Substituted into by L=30mm, obtain D ≈ 16mm, and in design, emitting antenna 14 and the light effective coverage diameter residing for receiving antenna 15 are 8mm, transmitting terminal and the receiving end axial deviation when relative rotation is not more than 0.1mm, therefore, can carry out Signal transmissions smoothly.
Receiving antenna 15 is arranged at the input end of light/electric converting unit 13, and this receiving antenna 15 comprises convex lens and optical filter, in order to gather the light beam received and filtering.Preferred as one, in the present embodiment, convex lens and optical filter are set in turn in the input end of light/electric converting unit 13, make light beam planoconvex lens gather process after carry out filtering process by optical filter, and the design of optical filter can only allow the light of laser center wavelength to pass through, avoid the interference of parasitic light.
As shown in Figure 5, be the circuit diagram of electrical/optical converting unit 12, wherein, 1201 is level shifting circuit, and 1202 is drive circuit for laser, and 1203 is laser instrument.This electrical/optical converting unit 12 comprises above-mentioned level shifting circuit 1201, drive circuit for laser 1202 and laser instrument 1203, and level shifting circuit 1201, drive circuit for laser 1202 and laser instrument 1203 connect successively, level shifting circuit 1201 is arranged between FPGA unit 11 and drive circuit for laser 1202 in order to signal level to be converted in scope that two ends circuit port allows, the level format of the electric signal that FPGA unit 11 exports by this level shifting circuit 1201 is converted to the receivable form of drive circuit for laser 1202 and after being supplied to drive circuit for laser 1202, by drive circuit for laser 1202 electric signal received amplified and modulate, to ensure that laser instrument 1203 is luminous according to modulated signal sequences, serial pulses code is launched.Preferred as one, in the present embodiment, level shifting circuit 1201 adopts the MAX9371 of MAXINM the Transistor-Transistor Logic level that FPGA unit 11 exports is converted to LVPECL level and exports to drive circuit for laser 1202; Drive circuit for laser adopts MAX3738; Laser instrument 1203 adopts semiconductor laser, its centre wavelength is 850nm, integrated monitor detector " PD " in this laser instrument 1203, luminous strong and weak in order to monitoring laser device 1203, drive circuit for laser 1202 can carry out power adjustment according to the luminescence power of laser instrument 1203; Laser Modulation mode adopts direct intensity modulation, and " 1 " is luminescence, and " 0 " is not luminous, and therefore receiving end obtains pulse signal by detecting " having light " " unglazed ".
As shown in Figure 6, for the circuit diagram of light/electric converting unit 13, wherein, 1301 is photodetector, 1302 is linear amplifier circuit, in the present embodiment by amplitude limiting amplifier circuit and clock data recovery circuit set as a whole, i.e. amplitude limiting amplifier circuit and clock data recovery circuit 1303, above-mentioned photodetector 1301, linear amplifier circuit 1302, amplitude limiting amplifier circuit and clock data recovery circuit 1303 connect successively, this signal to be amplified by linear amplifier circuit to linear amplifier circuit by photodetector by the Signal transmissions detected, be limited in the receivable scope of circuit of its output terminal by amplitude limiting amplifier circuit again, clock data recovery circuit is in order to provide decoding clock signal to FPGA unit 11, the road serial data signal that the light received/electric converting unit 13 exports regularly is decoded by FPGA unit 11 and recovers original signal.Preferred as one, in the present embodiment, photodetector 1301 adopts high sensitivity photodetector AD500 series, monitoring center's wavelength is the light signal of 850nm, this serial photodetector adopts silicon avalanche photodiode, has high sensitivity, detectable faint light signal, linear amplifier circuit 1302 adopts two-stage to amplify, two-stage amplifying circuit all adopts radio frequency amplifier AD8350 and peripheral components, the first order is that high multiple amplifies, completed by high multiple amplification electronic circuit, be mainly used in signal amplitude to amplify, the second level is that low multiple amplifies, completed by low multiple amplification electronic circuit, is mainly used in impedance matching and buffering, amplitude limiting amplifier circuit and clock data recovery circuit 1303 adopt integrated chip ADN2814, this chip is the device being exclusively used in clock and data recovery that AD company produces, inner integrated clipping amplifier, thus simplify circuit design, reduce cost, enhance stability, the receivable frequency input signal of ADN2814 is 10MHz ~ 675MHz, the frequency clock signal of input signal can be recovered without the need to external reference clock, externally export the clock signal of difference and the data-signal with clock signal synchronization simultaneously, after this data-signal exports to FPGA unit 11, by FPGA unit 11 according to clock reference and coding rule, recover former multi-channel electric signal.
During installation, can fixed end signal modular converter 4 be arranged on the framework of stiff end, round end signal conversion module 5 is arranged on the rotating frame that is connected with motor bearings, and fixed end signal modular converter 4 and the optical antenna subtend of round end signal conversion module 5 are arranged, and (namely the stiff end receiving antenna 401 of fixed end signal modular converter 4 is arranged at the opposite of the round end emitting antenna 502 of round end signal conversion module 5, stiff end emitting antenna 402 is arranged at the opposite of round end receiving antenna 501), and make the symcenter of the optical antenna of two signal conversion module be positioned on the center line of rotating shaft 8, in order to ensure that two signal conversion module have enough optical signal transmission to relative signal conversion module place under rotation status, light transmission path does not arrange any shelter.Simultaneously, the optical filter of receiving antenna 15 (i.e. stiff end receiving antenna 401 and round end receiving antenna 501) can be arranged at the centre of convex lens and photodetector 1301, and make laser instrument 1203 operation wavelength be 850nm, therefore, be only make the light of 850nm centre wavelength pass through by filter designs, avoid the interference of other parasitic lights.
As shown in Figure 7, be the schematic diagram of single-shaft-rotation inertial navigation signal transmission method of the present invention, the method comprises the steps:
S1, electric signal waiting for transmission is converted to light signal;
S2, the light signal be converted in step S1 to be transmitted between the stiff end and round end of Rotating Inertial Navigation System by wireless light communication mode;
S3, be converted to electric signal by transmitting the light signal obtained in step S2.
Single-shaft-rotation inertial navigation signal device of the present invention can realize the non contact signal transmission inputted, output interface is respectively no less than 9 tunnels, and frequency transmission signal is minimum is 10MHz, the highest 155MHz that is not less than, and effective propagation path is 20mm ~ 80mm.Adopt technical scheme of the present invention can ensure the transmission precision of 10-7 magnitude, through actual and Rotating Inertial Navigation System interoperability test, the transmission range of 30mm, gyro frequency be 2 turns/s rotating speed, single transmission data are no less than 10000 frames, accumulative transmission data are no less than in the statistics of 100000 frames, all do not occur the situation of frame losing, wrong frame; Every frame data are 24 bytes, and every byte comprises again 1 start bit, 8 data bit, 1 position of rest totally 10, therefore every frame data are in 240, are no less than 10000 frame zero defects, demonstrate 10
-7the transmission precision of magnitude.
Although described the present invention and advantage thereof in detail, be to be understood that and can have carried out various change when not exceeding the spirit and scope of the present invention limited by appended claim, substituting and conversion.And the scope of the application is not limited only to the specific embodiment of process, equipment, means, method and step described by instructions.One of ordinary skilled in the art will readily appreciate that from disclosure of the present invention, can use perform the function substantially identical with corresponding embodiment described herein or obtain and its substantially identical result, existing and that will be developed in the future process, equipment, means, method or step according to the present invention.Therefore, appended claim is intended to comprise such process, equipment, means, method or step in their scope.
Claims (10)
1. a single-shaft-rotation inertial navigation signal transmitting device, is characterized in that, stiff end and the round end of Rotating Inertial Navigation System are provided with signal conversion module; The signal conversion module at described stiff end place and the signal conversion module at round end place are that wireless light communication is connected; Described signal conversion module is provided with electrical/optical converting unit and light/electric converting unit to realize the mutual conversion between light signal and electric signal.
2. single-shaft-rotation inertial navigation signal transmitting device according to claim 1, is characterized in that, comprises emitting antenna and receiving antenna in order to launch light signal and to receive.
3. single-shaft-rotation inertial navigation signal transmitting device according to claim 2, is characterized in that, described emitting antenna is arranged at described electrical/optical converting unit output terminal, and described emitting antenna comprises concavees lens, in order to beam expander; Described receiving antenna is arranged at described light/electric converting unit input end, and described receiving antenna comprises convex lens and optical filter, in order to gather the light beam received and filtering.
4. single-shaft-rotation inertial navigation signal transmitting device according to claim 1, it is characterized in that, described signal conversion module also comprises FPGA unit, described FPGA unit is connected with described electrical/optical converting unit and light/electric converting unit respectively, in order to multi-channel electric signal be encoded to a road serial electric signal and be transferred to described electrical/optical converting unit, the road serial electric signal that described light/electric converting unit exports is encoded to multi-channel electric signal.
5. single-shaft-rotation inertial navigation signal transmitting device according to claim 4, it is characterized in that, described signal conversion module also comprises interface level converting unit, and described interface level converting unit is arranged at the input end of described FPGA unit in order to described multi-channel electric signal is converted to the receivable level format of described FPGA unit.
6. single-shaft-rotation inertial navigation signal transmitting device according to claim 1, it is characterized in that, described electrical/optical converting unit comprises level shifting circuit, drive circuit for laser and laser instrument, and described level shifting circuit, drive circuit for laser and laser instrument connect successively.
7. single-shaft-rotation inertial navigation signal transmitting device according to claim 1, it is characterized in that, described light/electric converting unit comprises photodetector, linear amplifier circuit, amplitude limiting amplifier circuit, clock data recovery circuit, and described photodetector, linear amplifier circuit, amplitude limiting amplifier circuit and clock data recovery circuit connect successively.
8. single-shaft-rotation inertial navigation signal transmitting device according to claim 7, is characterized in that, described linear amplifier circuit comprises the high multiple amplified for signal amplitude and amplifies electronic circuit and amplify electronic circuit for the low multiple of impedance matching and buffering.
9. single-shaft-rotation inertial navigation signal transmitting device according to claim 1, is characterized in that, also comprise system clock, and described system clock is connected with FPGA unit to control the inner sequential of this FPGA unit.
10. a single-shaft-rotation inertial navigation signal transmission method, is characterized in that, comprises the following steps:
S1, electric signal waiting for transmission is converted to light signal;
S2, the light signal be converted in step S1 to be transmitted between the stiff end and round end of Rotating Inertial Navigation System by wireless light communication mode;
S3, be converted to electric signal by transmitting the light signal obtained in step S2.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106886252A (en) * | 2017-01-18 | 2017-06-23 | 联想(北京)有限公司 | A kind of coupling assembly and electronic equipment |
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