CN107688265A - A kind of implementation method of fabry perot cavity drive circuit - Google Patents
A kind of implementation method of fabry perot cavity drive circuit Download PDFInfo
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- CN107688265A CN107688265A CN201710756965.7A CN201710756965A CN107688265A CN 107688265 A CN107688265 A CN 107688265A CN 201710756965 A CN201710756965 A CN 201710756965A CN 107688265 A CN107688265 A CN 107688265A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
- G02F1/213—Fabry-Perot type
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- Optics & Photonics (AREA)
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Abstract
The present invention provides a kind of implementation method of fabry perot cavity drive circuit, and step is as follows：One, select reference voltage voltage stabilizing chip；Two, control the input of D/A conversion circuit digital quantity；Three, digital-to-analogue conversion chip is selected, designs D/A conversion circuit；Four, voltage follow chip is selected, design voltage follows circuit；Five, select voltage amplification chip, design voltage amplifying circuit；Six, experimental verification is carried out, the circuit output signal of design is tested；Pass through above step, realize a kind of implementation method of fabry perot cavity drive circuit, it is high compared to other method precision, fabry perot cavity drive circuit output result can be made more reliable, in combination with reference voltage circuit, control circuit, D/A conversion circuit, voltage follower circuit and voltage amplifier circuit, make result more stable, suitable for the application scenario for requiring precision stability high.
Description
Technical field
The present invention provides a kind of implementation method of Fabry-Perot cavity drive circuit, and Fabry Perot can be entered
Row voltage drives, including reference voltage circuit, control circuit, D/A conversion circuit, voltage follower circuit and voltage amplification
Circuit, belong to hardware circuit design technical field.
Background technology
In optics, Fabry-Perot cavity is a kind of multiple beam wave filter being made up of two pieces of parallel glass plates, its
In the relative inner surface of two pieces of glass plates all there is high reflectance, characteristic be when the frequency of incident light meets its resonance condition,
Very high peak value occurs in its transmission spectrum, correspond to very high transmissivity.
Conventional fiber-optic grating sensor demodulation method has the grating sensor wavelength solution based on Fabry-Perot cavity
Tune method, the strain transducer signal demodulation method based on grating sensor wavelength shift, the temperature based on grating sensor wavelength shift
Sensor signal demodulation method is spent, wherein the grating sensor Wavelength demodulation method based on Fabry-Perot cavity is because of implementation method
Simple precision height is widely used in Practical Project, and the drive circuit of Fabry-Perot cavity is during demodulation
Play an important role, therefore the precision of drive circuit has important influence with stability to demodulating, but existing method cloth
In-precision of the drive circuit of Perot resonator cavity is relatively low, can not meet the needs of in practical application.
In order to be preferably demodulated to fiber-optic grating sensor, improve the precision of demodulation, based on above present situation and
Problem, the present invention it is a kind of based on Fabry-Perot cavity drive circuit implementation method, including reference voltage circuit, control
Circuit, D/A conversion circuit, voltage follower circuit and voltage amplifier circuit processed, it is possible to increase Fabry-Perot cavity
Drive circuit precision and stability, so as to improve the grating sensor Wavelength demodulation method based on Fabry-Perot cavity,
The demodulation accuracy of fiber-optic grating sensor is improved, is easy to practical application.
The content of the invention
(1) purpose of the present invention is：
The purpose of the present invention is to realize a kind of implementation method of Fabry-Perot cavity drive circuit, and it is related to one kind
The realization of Fabry-Perot cavity drive circuit, including reference voltage circuit, control circuit, D/A conversion circuit, electricity
Pressure follows circuit and voltage amplifier circuit, is advantageous to improve the precision of Fabry-Perot cavity drive circuit, disclosure satisfy that reality
The demand of the application on border.
(2) its concrete technical scheme is as follows：
A kind of implementation method of Fabry-Perot cavity drive circuit of the present invention, i.e., a kind of Fabry-Perot cavity
The implementation method of drive circuit, it is comprised the following steps that：
Step 1, reference voltage voltage stabilizing chip is selected, carry out the design of reference voltage circuit, reference voltage circuit determines number
Type matrix intends the precision of conversion chip；
Step 2, controlled by single-chip microcomputer and produce data signal, control the input of D/A conversion circuit digital quantity；
Step 3, digital-to-analogue conversion chip is selected, design D/A conversion circuit, convert digital signals into simulation
Signal；
Step 4, voltage follow chip is selected, design voltage follows circuit, and voltage follower circuit realizes that output becomes with input
Change, can solve the problem that driving voltage is loaded into caused distortion on Fabry-Perot cavity；
Step 5, voltage amplification chip is selected, design voltage amplifying circuit, voltage amplification is produced into driving Fabry-Perot
The sawtooth voltage of sieve resonator；
Step 6, experimental verification is carried out, the circuit output signal of design is tested；
Wherein, " the selection reference voltage voltage stabilizing chip, carry out the design of reference voltage circuit " described in step 1, its
The practice is as follows：Reference voltage voltage stabilizing chip is selected according to the use environment of the requirement of design and circuit, the present invention uses benchmark
Voltage voltage stabilizing chip REF195 provides reference voltage, and according to the electric circuit diagram design circuit in the chip handbook of the chip.
Wherein, " being controlled by single-chip microcomputer and producing data signal, controlling D/A conversion circuit described in step 2
The input of digital quantity ", its practice are as follows：Use model XC7Z020-1CLG484I integrated development board Miz702 (Nanjing rice
Join electronics), using using field programmable gate array (i.e. Field-Programmable Gate Array, hereinafter referred to as
FPGA digital-to-analog circuit digital quantity) is controlled, the digital quantity that circulation is produced from 0 to 65535 successively is electric as digital-to-analogue conversion
The input on road.
Wherein, " the selection digital-to-analogue conversion chip, design D/A conversion circuit " described in step 3, it is made
Method is as follows：From DAC8728 chips as analog-digital chip, and according to the electric circuit diagram design electricity in the chip handbook of the chip
Road.
Wherein, " selection voltage follow chip, design voltage follow circuit " described in step 4, its practice is as follows：
From OPA277 chips as voltage follow chip, and according to the electric circuit diagram design circuit in the chip handbook of the chip.
Wherein, " selection voltage amplification chip, the design voltage amplifying circuit " described in step 5, its practice is as follows：
From OPA551 chips as voltage follow chip, and according to the electric circuit diagram design circuit in the chip handbook of the chip.
Wherein, " carrying out experimental verification, the circuit output signal of design is tested " described in step 6, it is made
Method is as follows：After circuit of the present invention is added into electricity, the waveform of circuit output is shown using oscillograph, and use oscillography
The maximin of device measurement output, repeats, observes the stability of output waveform.
By above step, a kind of implementation method of Fabry-Perot cavity drive circuit is realized, compared to other
Method precision it is high, Fabry-Perot cavity drive circuit output result can be made more reliable, in combination with reference voltage electricity
Road, control circuit, D/A conversion circuit, voltage follower circuit and voltage amplifier circuit, make result more stable, be applicable
In the application scenario for requiring precision stability high.
(3) the advantage of the invention is that：
A kind of implementation method of Fabry-Perot cavity drive circuit, solves traditional Fabry-Perot cavity
Drive circuit precision is low, the problem of stability difference, and by selecting high-precision chip, in combination with reference voltage circuit,
Control circuit, D/A conversion circuit, voltage follower circuit and voltage amplifier circuit, Fabry-Perot cavity can be driven
Dynamic circuit more conforms to the needs of practical application, on this basis, carries out modular encapsulation to circuit, is more convenient for debugging, has
Beneficial to popularization and application.
Brief description of the drawings
Fig. 1 the method for the invention flow charts.
Fig. 2 circuit output result figures of the present invention.
Embodiment
A kind of implementation method of Fabry-Perot cavity drive circuit of the present invention, as shown in Figure 1, its specific steps is such as
Under：
Step 1, reference voltage voltage stabilizing chip is selected, carries out the design of reference voltage circuit, reference voltage circuit can make mould
Number change-over circuit has accurate, reliable power supply to export, and the precision of logarithmic mode conversion plays conclusive effect.Therefore reference voltage
Voltage stabilizing chip should have some characteristics, and such as initial precision is accurate, can ensure voltage not with ring in some special cases
Border and change, during specific circuit design, according to the use environment of the requirement of design and circuit select benchmark electricity
Press voltage stabilizing chip.
The present invention provides reference voltage using reference voltage voltage stabilizing chip REF195, and REF195 is precision, micro energy lose, low
Pressure difference, low voltage reference voltage source, can well adapt to the change of circuit and load, and it has low excursion with temperature (5ppm/ DEG C), low
The characteristics such as source current (45uA), High Output Current (30mA), applied in data collecting system and precision instrument.
Reference voltage circuit outputs test result as shown in table 1：
The reference voltage circuit of table 1 exports measurement result
Step 2, controlled by single-chip microcomputer and produce data signal, control the input of D/A conversion circuit digital quantity, this
Invention utilizes field-programmable using model XC7Z020-1CLG484I integrated development board Miz702 (Nanjing rice joins electronics)
Gate array (i.e. Field-Programmable Gate Array, hereinafter referred to as FPGA) control digital-to-analog circuit digital quantity
Input, successively circulation produce input of the digital quantity as D/A conversion circuit from 0 to 65535；
Step 3, D/A conversion circuit is designed, by the digital signal conversion of input into analog signal output, in circuit
Application in, the type of signal is data signal, and identify system need input signal be analog signal, it is therefore desirable to number
Word analog conversion circuit, two kinds of signals are changed, to meet the needs of real system；
From DAC8728 chips as digital-to-analogue conversion chip, DAC8728 resolution ratio is 16, and output is voltage
Signal, feature are low in energy consumption, there is 16 parallel-by-bit interfaces, and its minimum operating temperature is minus 40 degrees Celsius, and maximum operating temperature reaches
To positive 105 degrees Celsius, operating voltage 9V-36V, settling time 15us.
The output measurement result of analog-to-digital conversion circuit is as shown in table 2：
The output measurement result of the analog-to-digital conversion circuit of table 2
Step 4, design voltage follow circuit, and voltage follower circuit realizes that output changes with input, can solve the problem that driving electricity
Pressure is loaded into caused distortion on Fabry-Perot cavity；
Voltage follower circuit is to realize that output changes with input, can play and isolate between input circuit and output circuit
Effect, while load-carrying ability can be increased, improve power output, prevent front stage circuits from being interfered to output, can
The precision of raising system.Distortion and decrease higher level's electricity are produced in order to avoid driving voltage is loaded on Fabry-Perot cavity
Influence of the road to Fabry-Perot cavity, circuit is followed using model OPA277 voltage follow chip design voltage.
OPA277 is that have high open-loop gain (134dB), Low-bias Current (being up to 1nA) and wide power voltage input model
The operational amplifier of (± 2V to ± 18V) is enclosed, has single, double and four-way version, can be applied to well in various circuits, it is more
Applied to voltage follower circuit.
The output measurement result of voltage follower circuit is as shown in table 3：
The output measurement result of the voltage follower circuit of table 3
Step 5, voltage amplifier circuit produce voltage amplification the sawtooth voltage of driving Fabry-Perot cavity, electricity
The main function for pressing amplifier is that signal is amplified, and the output signal of voltage amplifier is mainly electric signal, has high increase
The characteristics of beneficial, electric current, voltage can be changed, and in the application of reality, because actual circuit is shorter, it is not easy to produce
Interference.Sawtooth waveforms is amplified to using model OPA551 voltage amplification chip and meets that Fabry-Perot cavity chamber drives
The requirement of signal voltage amplitude.
OPA551 chips have the characteristics of high voltage, high current, unity gain stable, are operated in -40 DEG C to+125 DEG C
Temperature range, offset voltage 3mV, offset drift 7uV/C, input bias current is up to 100pA, and is provided with high pressure Slew Rate
(15V/ μ s) and wide bandwidth (3MHz), device are provided with internal protection, to prevent overheat and current overload.
The output measurement result of voltage amplifier circuit is as shown in table 4：
The reference voltage source circuit of table 4 exports measurement result
Step 6, experimental verification is carried out, the circuit output signal of design is tested, experiments verify that, this driving electricity
Road can produce 12V to 30V scanning signal, waveform caused by circuit be shown by oscillograph, electricity of the present invention
The result of the output on road disturbs smaller, signal as shown in fig. 2, it can be seen that circuit output waveform occurs for the drive signal of design
It is stable, fully meet the driving demand of Fabry-Perot cavity.
Claims (7)
1. a kind of implementation method of Fabry-Perot cavity drive circuit, i.e., a kind of Fabry-Perot cavity drive circuit
Implementation method, it is characterised in that：It is comprised the following steps that：
Step 1, reference voltage voltage stabilizing chip is selected, carry out the design of reference voltage circuit, reference voltage circuit determines digital mould
Intend the precision of conversion chip；
Step 2, controlled by single-chip microcomputer and produce data signal, control the input of D/A conversion circuit digital quantity；
Step 3, digital-to-analogue conversion chip is selected, design D/A conversion circuit, convert digital signals into simulation letter
Number；
Step 4, voltage follow chip being selected, design voltage follows circuit, and voltage follower circuit realizes that output changes with input,
It can solve the problem that driving voltage is loaded into caused distortion on Fabry-Perot cavity；
Step 5, voltage amplification chip is selected, design voltage amplifying circuit, it is humorous that voltage amplification is produced into driving Fabry-Perot
Shake the sawtooth voltage of chamber；
Step 6, experimental verification is carried out, the circuit output signal of design is tested；
By above step, a kind of implementation method of Fabry-Perot cavity drive circuit is realized, compared to others side
Method precision is high, and Fabry-Perot cavity drive circuit output result can be made more reliable, in combination with reference voltage circuit,
Control circuit, D/A conversion circuit, voltage follower circuit and voltage amplifier circuit, make result more stable, be applied to
In the application scenario high to precision stability requirement.
2. a kind of implementation method of Fabry-Perot cavity drive circuit according to claim 1, i.e., a kind of method cloth
In-implementation method of Perot resonator cavity drive circuit, it is characterised in that：
" selection reference voltage voltage stabilizing chip, carry out the design of reference voltage circuit " described in step 1, its practice is as follows：
Reference voltage voltage stabilizing chip is selected according to the use environment of the requirement of design and circuit, the present invention uses reference voltage voltage stabilizing core
Piece REF195 provides reference voltage, and according to the electric circuit diagram design circuit in the chip handbook of the chip.
3. a kind of implementation method of Fabry-Perot cavity drive circuit according to claim 1, i.e., a kind of method cloth
In-implementation method of Perot resonator cavity drive circuit, it is characterised in that：
Described in step 2 " controlled by single-chip microcomputer and produce data signal, control D/A conversion circuit digital quantity
Input ", its practice is as follows：, can using the scene of utilization using model XC7Z020-1CLG484I integrated development board Miz702
Programming gate array is FPGA control digital-to-analog circuit digital quantities, and the digital quantity that circulation is produced from 0 to 65535 successively is used as numeral
The input of analog conversion circuit.
4. a kind of implementation method of Fabry-Perot cavity drive circuit according to claim 1, i.e., a kind of method cloth
In-implementation method of Perot resonator cavity drive circuit, it is characterised in that：
" selection digital-to-analogue conversion chip, design D/A conversion circuit " described in step 3, its practice is as follows：Choosing
By the use of DAC8728 chips as analog-digital chip, and according to the electric circuit diagram design circuit in the chip handbook of the chip.
5. a kind of implementation method of Fabry-Perot cavity drive circuit according to claim 1, i.e., a kind of method cloth
In-implementation method of Perot resonator cavity drive circuit, it is characterised in that：
" selection voltage follow chip, design voltage follow circuit " described in step 4, its practice is as follows：From OPA277
Chip is as voltage follow chip, and according to the electric circuit diagram design circuit in the chip handbook of the chip.
6. a kind of implementation method of Fabry-Perot cavity drive circuit according to claim 1, i.e., a kind of method cloth
In-implementation method of Perot resonator cavity drive circuit, it is characterised in that：
" selection voltage amplification chip, design voltage amplifying circuit " described in step 5, its practice is as follows：From OPA551
Chip is as voltage follow chip, and according to the electric circuit diagram design circuit in the chip handbook of the chip.
7. a kind of implementation method of Fabry-Perot cavity drive circuit according to claim 1, i.e., a kind of method cloth
In-implementation method of Perot resonator cavity drive circuit, it is characterised in that：
" carrying out experimental verification, the circuit output signal of design is tested " described in step 6, its practice is as follows：Will
After circuit of the present invention is plus electricity, the waveform of circuit output is shown using oscillograph, and it is defeated with oscilloscope measurement
The maximin gone out, is repeated, and observes the stability of output waveform.
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| CN201710756965.7A CN107688265A (en) | 2017-08-29 | 2017-08-29 | A kind of implementation method of fabry perot cavity drive circuit |
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| CN201710756965.7A CN107688265A (en) | 2017-08-29 | 2017-08-29 | A kind of implementation method of fabry perot cavity drive circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109493700A (en) * | 2018-12-06 | 2019-03-19 | 上海图菱新能源科技有限公司 | Operational amplifier test macro for Remote Virtual Experiments |
| WO2020007517A1 (en) * | 2018-07-03 | 2020-01-09 | Continental Automotive Gmbh | Method for analysing a fluid of a motor vehicle using an optical sensor |
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| EP2031715A1 (en) * | 2007-08-29 | 2009-03-04 | Intune Networks Limited | Reduction of wavelength tuning time of laser diodes |
| CN101832791A (en) * | 2010-04-13 | 2010-09-15 | 浙江大学 | Fiber grating sensor wavelength demodulating system based on C8051F320 singlechip |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020007517A1 (en) * | 2018-07-03 | 2020-01-09 | Continental Automotive Gmbh | Method for analysing a fluid of a motor vehicle using an optical sensor |
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Application publication date: 20180213 |