CN112525182A - Small-size fiber optic gyroscope signal processing circuit based on integrated packaging - Google Patents
Small-size fiber optic gyroscope signal processing circuit based on integrated packaging Download PDFInfo
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- CN112525182A CN112525182A CN202011464489.XA CN202011464489A CN112525182A CN 112525182 A CN112525182 A CN 112525182A CN 202011464489 A CN202011464489 A CN 202011464489A CN 112525182 A CN112525182 A CN 112525182A
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- 238000012545 processing Methods 0.000 title claims abstract description 31
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 20
- 239000000835 fiber Substances 0.000 title claims description 5
- 238000004891 communication Methods 0.000 claims abstract description 20
- 239000013307 optical fiber Substances 0.000 claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
- G01C19/721—Details
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- Optics & Photonics (AREA)
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- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The invention relates to the technical field of inertial navigation, in particular to a small-size optical fiber gyroscope signal processing circuit based on integrated packaging, which comprises: the device comprises a signal acquisition unit, an output driving unit and an RS-422/485 communication interface unit; all units use bare chips, all units work independently and do not interfere with each other, and the signal acquisition unit, the output driving unit and the RS-422/485 communication interface unit are all packaged in the same cavity, so that integrated packaging is realized. The invention adopts integrated encapsulation, integrates a plurality of components by multilayer wiring of a single cavity, and encapsulates and integrates each functional unit in the same cavity, thereby improving the integration level of the fiber-optic gyroscope system compared with the prior discrete device structure, greatly reducing the size of circuit encapsulation while integrating a plurality of functions required by the fiber-optic gyroscope system, and meeting the requirement of the military quality grade of the H-grade standard in GJB2438A-2002 hybrid integrated circuit general Specification.
Description
Technical Field
The invention relates to the technical field of inertial navigation, in particular to a small-size optical fiber gyroscope signal processing circuit based on integrated packaging.
Background
The fiber-optic gyroscope is an important part of an inertial navigation system and mainly comprises a light path and a signal processing circuit. In conventional designs, the signal processing circuit is intended to convert the voltage signal of the fiber-optic gyroscope into a frequency signal. The signal processing circuit is usually designed by adopting a separated plastic package or ceramic package device, and the design is often low in efficiency, high in cost, large in occupied space and easy to cause signal crosstalk and loss, so that the miniaturization of the optical fiber gyroscope is hindered, and the application field of the optical fiber gyroscope is limited.
Disclosure of Invention
In order to solve the problems of low efficiency, high cost and large occupied space of the traditional signal processing circuit, the invention provides a small-size optical fiber gyroscope signal processing circuit based on integrated packaging.
A small-size fiber optic gyroscope signal processing circuit based on integrated packaging comprises: the device comprises a signal acquisition unit, an output driving unit and an RS-422/485 communication interface unit; all units use bare chips, all units work independently and do not interfere with each other, and the signal acquisition unit, the output driving unit and the RS-422/485 communication interface unit are all packaged in the same cavity, so that integrated packaging is realized.
Furthermore, the wiring mode inside the cavity base is multilayer wiring, the multilayer wiring is used for electrical connection, the integrated packaging of multiple devices and multiple chips is realized, and the wiring size is 14.60 +/-0.20 mm multiplied by 2.5 +/-0.25 mm.
Furthermore, the signal acquisition unit is mainly used for acquiring and converting signals of the photoelectric detector of the fiber-optic gyroscope system and acquiring 1VPPAnd converts the analog signal to a 14-bit digital signal.
Furthermore, the signal acquisition unit comprises a differential operational amplifier and an analog-to-digital converter, wherein the differential operational amplifier is used for amplifying the acquired analog signal; the analog-to-digital converter is used for realizing 1-path 1VPPAnd converting the analog signal.
Further, the output driving unit converts the 16-bit digital signal into a differential analog signal, and the output amplitude of the differential analog signal is not lower than 8VPPMainly for driving the Y waveguide.
Further, the output driving unit comprises a digital-to-analog converter and a dual-channel operational amplifier, wherein the digital-to-analog converter is used for converting a 16-bit digital signal into a differential analog signal, and the dual-channel operational amplifierMainly adjusts the amplitude of the differential analog signal to make the output differential amplitude at 8VPPThe above.
Furthermore, the RS-422/485 communication interface transceiver unit comprises a 1-channel RS-422/485 interface receiver unit and a 1-channel RS-422/485 interface transmitter unit, and is mainly used for data communication.
Furthermore, the RS-422/485 communication interface transceiver unit is designed by adopting an RS-422/485 transceiver chip, so that the 1-channel RS-422/485 transceiver function is realized.
Furthermore, electronic components selected in the small-size optical fiber gyroscope signal processing circuit meet the military use environment of-55-125 ℃.
Furthermore, the cavity is a ceramic cavity, and the integrated packaging is realized by adopting a high-temperature co-fired ceramic process.
The invention has the beneficial effects that:
1. the optical fiber gyroscope signal processing circuit is designed in an integrated mode, the signal acquisition function, the output driving function and the RS-422/485 interface function required by the optical fiber gyroscope signal processing circuit are integrated in the same package, the application is simple, the design efficiency of the optical fiber gyroscope is improved, and the cost is reduced;
2. the signal processing circuit of the fiber-optic gyroscope adopts a high-density design, the inside of the signal processing circuit is designed by adopting a bare chip, the integration density is greatly improved, the signal processing circuit adopts integrated packaging, a separate substrate is not needed in the inside of the signal processing circuit, and the packaging size is reduced;
3. all the used devices in the signal processing circuit of the fiber-optic gyroscope meet the military requirements, and the circuit reaches the H-level standard military quality grade in GJB2438A-2002 hybrid integrated circuit general Specification.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of a multi-function circuit-based architecture according to the present invention;
fig. 2 is a schematic diagram of a multi-functional circuit package structure based on integrated package according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Referring to fig. 1, the present invention provides a schematic structural diagram of a signal processing circuit based on a small-sized fiber optic gyroscope, including: the device comprises a signal acquisition unit, an output driving unit and an RS-422/485 communication interface unit; all units work independently and do not interfere with each other, and the signal acquisition unit, the output driving unit and the RS-422/485 communication interface unit are all packaged in the same ceramic cavity, so that integrated packaging is realized.
In the embodiment, the wiring mode in the cavity base is multilayer wiring, and the wiring mode is used for independent electrical connection of each unit, so that integrated packaging of multiple devices and multiple chips is realized, and the method greatly reduces the packaging size of the circuit.
Further, in a preferred embodiment, the layout and wiring of the circuit adopt 5-layer wiring, wherein the signal layer, the power supply layer and the ground layer are all independently separated, and the ground layer is used for isolation among the signal layers, so that signal crosstalk is reduced. Signals between adjacent chips are wired nearby, so that the package size is reduced, and the interference caused by long-distance wiring is reduced.
Further, in a preferred embodiment, the wiring inside the base of the chamber has a dimension of 14.60 + -0.20 mm × 2.5 + -0.25 mm.
In this embodiment, each electronic component in the small-sized fiber-optic gyroscope signal processing circuit is a bare chip, and each resistor and capacitor is a 0402 chip component, which not only reduces the package volume.
Meanwhile, electronic components selected in the small-size optical fiber gyroscope signal processing circuit can meet military use environments, namely meet the requirement of military temperature use range of-55-125 ℃, the use scene of the multifunctional circuit is enlarged, and the popularization and the application are facilitated.
In this embodiment, the signal acquisition unit is mainly used for acquiring and converting signals of the photodetector of the fiber-optic gyroscope system, and acquiring 1V signalsPPAnd converts the analog signal to a 14-bit digital signal.
Furthermore, the signal acquisition unit comprises a differential operational amplifier and an analog-to-digital converter, wherein the differential operational amplifier is used for amplifying the acquired analog signal; the analog-to-digital converter is used for realizing 1-path 1VPPAnd converting the analog signal.
Specifically, the signal acquisition unit may be designed by using one differential operational amplifier chip and one analog-to-digital converter chip.
In the embodiment, the output driving unit converts the 16-bit digital signal into a differential analog signal, and the output amplitude of the differential analog signal is not lower than 8VPPMainly for driving the Y waveguide.
Furthermore, the output driving unit comprises a digital-to-analog converter and a dual-channel operational amplifier, wherein the digital-to-analog converter is used for converting a 16-bit digital signal into a differential analog signal, and the dual-channel operational amplifier is mainly used for adjusting the amplitude of the differential analog signal so that the output differential amplitude is 8VPPThe above.
Specifically, the output driving unit may be designed by using one digital-to-analog converter chip and one dual-channel operational amplifier chip.
In this embodiment, the RS-422/485 communication interface transceiver unit includes a 1-channel RS-422/485 interface receiver unit and a 1-channel RS-422/485 interface transmitter unit, and is mainly used for data communication with external devices.
Preferably, the RS-422/485 communication interface transceiver unit is designed by adopting an RS-422/485 transceiver chip, so that the 1-channel RS-422/485 transceiver function is realized.
In a preferred embodiment, the signal acquisition unit and the output driving unit are powered by +/-5V and 3.3V, and the RS-422 communication interface unit is powered by 3.3V.
In a preferred embodiment, each power supply pin is provided with an appropriate bypass capacitance, preferably a combination of one or more of 10 μ F or 0.1 μ F, to ensure proper operation of the multi-function circuit.
In this embodiment, a high-temperature co-fired ceramic process is used to integrally package each electronic component.
Fig. 2 is a schematic diagram of a multi-functional circuit package structure based on integrated package according to the present invention, which is detailed as follows: the single cavity for integrally packaging the small-sized fiber-optic gyroscope signal processing circuit provided by the embodiment has an overall size of 14.60 ± 0.20mm × 14.60 ± 0.20mm, and includes 3 functional units, which are respectively: u1 is a signal acquisition unit, U2 is an output driving unit, and U3 is an RS-42/4852 communication interface unit.
The invention adopts integrated encapsulation, designs a single-cavity multilayer wiring integration plurality of components, and encapsulates and integrates the signal acquisition unit, the output driving unit and the RS-422/485 communication interface unit in the same cavity, thereby improving the integration level of the fiber-optic gyroscope system compared with the prior discrete device structure, and greatly reducing the size of circuit encapsulation while integrating a plurality of functions required by the fiber-optic gyroscope system; in addition, the invention is simple to apply and can improve the design efficiency. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value; and can meet the requirement of the grade H standard military quality grade in GJB2438A-2002 hybrid integrated circuit general Specification.
When introducing elements of various embodiments of the present application, the articles "a," "an," "the," and "said" are intended to mean that there are one or more of the elements. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements other than the listed elements.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communicated with each other inside the two elements or the interaction relationship between the two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present application may be understood by those skilled in the art according to specific situations.
Although embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A small-size fiber-optic gyroscope signal processing circuit based on integrated packaging is characterized by comprising: the signal acquisition unit, the output drive unit and the RS-422/485 communication interface unit all work independently and do not interfere with each other, and the signal acquisition unit, the output drive unit and the RS-422/485 communication interface unit are all packaged in the same cavity, so that integrated packaging is realized.
2. The small-size optical fiber gyro signal processing circuit based on the integrated package as claimed in claim 1, wherein the wiring manner inside the cavity base is a multilayer wiring for electrical connection, and the wiring size is 14.60 ± 0.20mm x 2.5 ± 0.25 mm.
3. Small-size optical fiber gyroscope signal processing circuit based on integrated package according to claim 1The signal acquisition unit comprises a differential operational amplifier and an analog-to-digital converter, wherein the differential operational amplifier is used for amplifying the acquired analog signals; the analog-to-digital converter is used for realizing 1-path 1VPPConverting an analog signal; the signal acquisition unit is mainly used for acquiring and converting signals of the photoelectric detector of the fiber-optic gyroscope system and acquiring 1VPPAnd converts the analog signal to a 14-bit digital signal.
4. The signal processing circuit of the small-sized fiber-optic gyroscope based on the integrated package of claim 1, wherein the output driving unit comprises a digital-to-analog converter and a dual-channel operational amplifier, wherein the digital-to-analog converter is used for converting a 16-bit digital signal into a differential analog signal, and the dual-channel operational amplifier mainly adjusts the amplitude of the differential analog signal so that the output differential amplitude is 8VPPThe above.
5. The small-size fiber-optic gyroscope signal processing circuit based on integrated package of claim 1, wherein the RS-422/485 communication interface transceiver unit comprises a 1-channel RS-422/485 interface receiver unit and a 1-channel RS-422/485 interface transmitter unit, and is mainly used for data communication.
6. The small-size fiber-optic gyroscope signal processing circuit based on integrated package of claim 5, wherein the RS-422/485 communication interface transceiver unit adopts an RS-422/485 transceiver chip to realize 1-channel RS-422/485 transceiver function.
7. The small-size optical fiber gyroscope signal processing circuit based on integrated package of claim 1, wherein electronic components selected in the small-size optical fiber gyroscope signal processing circuit all meet military use environment of-55 ℃ to 125 ℃.
8. The small-size fiber optic gyroscope signal processing circuit based on integrated packaging of claim 1, wherein the cavity is a ceramic cavity, and the integrated packaging is realized by a high-temperature co-fired ceramic process.
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| CN202011464489.XA CN112525182A (en) | 2020-12-14 | 2020-12-14 | Small-size fiber optic gyroscope signal processing circuit based on integrated packaging |
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| CN202011464489.XA CN112525182A (en) | 2020-12-14 | 2020-12-14 | Small-size fiber optic gyroscope signal processing circuit based on integrated packaging |
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Cited By (1)
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| CN113819900A (en) * | 2021-09-17 | 2021-12-21 | 浙江航天润博测控技术有限公司 | Step wave circuit and Y waveguide integrated structure for fiber-optic gyroscope |
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| CN113819900A (en) * | 2021-09-17 | 2021-12-21 | 浙江航天润博测控技术有限公司 | Step wave circuit and Y waveguide integrated structure for fiber-optic gyroscope |
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