CN107084753A - A kind of ratio based on DSP removes formula optical fiber high accuracy frequency measurement sensor - Google Patents
A kind of ratio based on DSP removes formula optical fiber high accuracy frequency measurement sensor Download PDFInfo
- Publication number
- CN107084753A CN107084753A CN201710225336.1A CN201710225336A CN107084753A CN 107084753 A CN107084753 A CN 107084753A CN 201710225336 A CN201710225336 A CN 201710225336A CN 107084753 A CN107084753 A CN 107084753A
- Authority
- CN
- China
- Prior art keywords
- groups
- optical fiber
- voltage
- fibre
- high accuracy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 40
- 238000005259 measurement Methods 0.000 title claims description 18
- 239000000835 fiber Substances 0.000 claims abstract description 20
- 239000000523 sample Substances 0.000 claims abstract description 18
- 230000009466 transformation Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims abstract description 3
- 230000003321 amplification Effects 0.000 claims description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000001914 filtration Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
The sensor of high-acruracy survey, including LASER Light Source can be realized there is provided a kind of the present invention relates to rotor rotational frequency field of measuring technique, for launching laser to fibre-optical probe；Fibre-optical probe, including launching fiber and two groups of reception optical fiber, launching fiber are used to receive the reflection laser after reflecting through rotor blade by optical fiber in the Laser emission received to rotor blade to be measured, is received；Two groups of laser are carried out computing and obtain the real-time ratio of voltage by front end circuit, two groups of reflection lasers for receiving fibre-optical probe transmission；Dsp chip, handles the real-time ratio of voltage, draws electric voltage frequency, then obtains after linear transformation rotating speed.
Description
Technical field
The present invention relates to rotor rotational frequency field of measuring technique, specially a kind of optical fiber high accuracy frequency measurement sensor.
Background technology
Itself there is no the object of rotary shaft using being rigidly connected or can be considered a rotor during additional shaft, and rotor is made
It is an important part for the rotating part of motor.Usual rotor is made up of rotating shaft, rotor core and rotor windings.And
Rotor rotational frequency is one of parameter especially important in social life, produce reality.
And in order to measure the frequency of rotor, in the market occurs in that the frequency measuring instrument differed from one another, and in order to adapt to height
Pressure and strong electromagnetic interference environment, it will usually surveyed using the fibre optical sensor with good insulation characteristic and antijamming capability
Amount.However, because light wave there are different degrees of loss in the transmittance process of optical fiber, part light source can also be coupled to optical fiber
In, the unstable of light source power has so been resulted in, fiber-optic signal can be prevented to turn frequency letter from reacting rotor to be measured completely
Number, it is impossible to realize the measurement of the micro- frequency of high accuracy, therefore be badly in need of a kind of to realize the sensor of high-acruracy survey.
The content of the invention
The invention is intended to provide a kind of to realize the sensor of high-acruracy survey.
The present invention provides base case：A kind of ratio based on DSP removes formula optical fiber high accuracy frequency measurement sensor, including laser
Light source, transmitting laser to fibre-optical probe；
Fibre-optical probe, including launching fiber and two groups of reception optical fiber, launching fiber is by the Laser emission received to be measured
On rotor blade, receiving optical fiber is used to receive the reflection laser after reflecting through rotor blade；
Two groups of laser are carried out computing and obtain electricity by front end circuit, two groups of reflection lasers for receiving fibre-optical probe transmission
Ratio during compacting；
Dsp chip, handles the real-time ratio of voltage, draws electric voltage frequency, then obtains after linear transformation rotating speed.
The measurement sensor that the present invention is provided, compared to existing measuring system, 1. using two groups of reception optical fiber structures, to two
The signal that group is received in optical fiber is handled, and can effectively eliminate the factors such as light loss in reflectivity, light source couples, optical fiber
Influence, can be achieved the measurement of the micro- frequency of high accuracy；Two-way electricity is obtained 2. being handled using front end circuit the signal progress after transmitting
The real-time ratio of voltage of pressure, recycles dsp chip to carry out after data processing, it is ensured that frequency measurement result is more accurate reliable.
Preferred scheme one：Based on scheme it is preferred, front end circuit is put including two groups of photoelectric switching circuits, two groups of filtering
Two groups of reception optical fiber are transmitted the reflection laser come and are converted to two by big circuit and division circuit, two groups of photoelectric switching circuits respectively
Group conversion voltage；Two groups of conversion voltages are again respectively through obtaining two groups of amplification voltages after filter amplification circuit；Division circuit is to two
Group amplification voltage carries out the real-time ratio of voltage than obtaining two-way voltage after division operation.Beneficial effect：Photoelectric switching circuit is carried out
Two groups of conversion voltages are obtained after opto-electronic conversion, two groups of conversion voltages are obtained after amplifying after filtering respectively through filter amplification circuit
The real-time ratio of voltage than the two-way voltage except after is obtained after two groups of amplification voltages, two groups of amplification analog division circuits, using except
Method circuit has effectively eliminated the influence of two generation light loss factors in emissivity, light source couples, optical fiber, it is ensured that the standard of measurement
Really.
Preferred scheme two：Based on scheme it is preferred, fibre-optical probe is using mirror based fiber optica as axle center, and two groups of reception optical fiber are same
Axle is set.Beneficial effect：Using being coaxially disposed, it is ensured that fibre-optical probe compact conformation, small volume.
Preferred scheme three：Based on scheme it is preferred, two groups of optical fiber of fibre-optical probe are same fiber.Beneficial effect：
Light loss acquiescence in same fiber is consistent, therefore can give tacit consent to and enter the laser of front end circuit and do not influenceed by light loss,
It ensure that the accurate of the signal after calculating.
Preferred scheme four：Based on scheme it is preferred, in addition to for the real-time ratio of voltage to be adjusted between 0~3V
Limitation voltage magnitude circuit.Beneficial effect：Using voltage magnitude circuit is limited by between the real-time 0~3V of ratio of voltage, it is easy to
Follow-up dsp chip is handled the signal.
Preferred scheme five：Preferably four it is preferred, analog signal processing module also include low-pass filter circuit.Have
Beneficial effect：Low-pass filter circuit can exclude the interference of environment high-frequency noises, be further ensured that the accurate of measurement result.
Brief description of the drawings
Fig. 1 removes the structural representation of formula optical fiber high accuracy frequency measurement sensor for a kind of ratio based on DSP of the present invention；
Fig. 2 is the sectional view of fibre-optical probe in Fig. 1；
Fig. 3 is embodiment schematic diagram.
Embodiment
Below by embodiment, the present invention is further detailed explanation：
Reference in Figure of description includes：LASER Light Source 1, fibre-optical probe 2, preposing signal process circuit 3, dsp chip
4th, host computer 5, launching fiber 6, first group of reception optical fiber 7, second group of reception optical fiber 8, rotor top casing 9 to be measured, rotor leaf
Piece 10.
A kind of ratio based on DSP as shown in Figure 1 removes formula optical fiber high accuracy frequency measurement sensor, including：Including LASER Light Source
1, transmitting laser to fibre-optical probe 2；
Fibre-optical probe 2, as shown in Fig. 2 including a launching fiber 6 and two groups of reception optical fiber, every group includes six roots of sensation optical fiber,
First group of reception optical fiber 7 is distributed in the outside of launching fiber 6, and second group of reception optical fiber 8 is distributed in the outer of first group of reception optical fiber 7
The distance of any one optical fiber of side, launching fiber 6 and first group of reception optical fiber 7 is d, launching fiber 6 and second group of reception light
Fibre 8 fiber distance beLaunching fiber 6 in the Laser emission received to rotor blade 10 to be measured, will receive optical fiber and use
Reflection laser after reception is reflected through rotor blade 10；
Front end circuit, including two groups of photoelectric switching circuits, two groups of filter amplification circuits, division circuit, limitation voltage magnitudes
Two groups of reception optical fiber are transmitted the reflection laser come and are converted to by circuit and low-pass filter circuit, two groups of photoelectric switching circuits respectively
Two groups of conversion voltages, two groups of conversion voltages are again respectively through obtaining two groups of amplification voltages, division circuit pair after filter amplification circuit
Two groups of amplification voltages carry out the real-time ratio of voltage than obtaining two-way voltage after division operation；Limit voltage magnitude circuit and low pass filtered
Wave circuit to the real-time ratio of the voltage respectively to carrying out voltage magnitude amendment and analog filtering；
TMS320F28335 is selected in dsp chip 4, the present invention, it is internally integrated 68k*16bit RAM, 256K*
16bit FLASH, 16 road 12bit and maximum sampling rate 12.5MSPS A/D and 16 road PWM output modules, for filtering
Signal afterwards carries out data processing：Signal after analog filtering is converted into digital letter by the A/D conversion modules inside dsp chip 4
After number, FIR digital filterings are carried out to the data signal and FFT is calculated, turn of the frequency of input voltage, as rotor blade is drawn
Dynamic frequency, then frequency progress linear transformation can be drawn into rotating speed.
More than be only that the known general knowledge such as concrete structure and characteristic is not made excessively herein in embodiments of the invention, scheme
Description.It should be pointed out that for those skilled in the art, without departing from the structure of the invention, can also make
Several modifications and improvements, these should also be considered as protection scope of the present invention, these effects implemented all without the influence present invention
And practical applicability.The scope of protection required by this application should be based on the content of the claims, specific in specification
Embodiment etc. records the content that can be used for explaining claim.
Claims (6)
1. a kind of ratio based on DSP removes formula optical fiber high accuracy frequency measurement sensor, it is characterised in that：Including LASER Light Source, transmitting swashs
Light is to fibre-optical probe；
Fibre-optical probe, including launching fiber and two groups of reception optical fiber, the launching fiber is by the Laser emission received to be measured
On rotor blade, the optical fiber that receives is used to receive the reflection laser after reflecting through rotor blade；
Two groups of laser are carried out computing and obtain voltage reality by front end circuit, two groups of reflection lasers for receiving fibre-optical probe transmission
When ratio；
Dsp chip, handles the real-time ratio of voltage, draws electric voltage frequency, then obtains after linear transformation rotating speed.
2. the ratio according to claim 1 based on DSP removes formula optical fiber high accuracy frequency measurement sensor, it is characterised in that：It is described
Front end circuit includes two groups of photoelectric switching circuits, two groups of filter amplification circuits and division circuit,
Two groups of reception optical fiber are transmitted the reflection laser come and are converted to two groups of conversion electricity by two groups of photoelectric switching circuits respectively
Pressure；
Two groups of conversion voltage is again respectively through obtaining two groups of amplification voltages after filter amplification circuit；
The division circuit carries out the real-time ratio of voltage than obtaining two-way voltage after division operation to two groups of amplification voltages.
3. the ratio according to claim 1 based on DSP removes formula optical fiber high accuracy frequency measurement sensor, it is characterised in that：It is described
Fibre-optical probe is using mirror based fiber optica as axle center, and two groups of reception fiber-coaxials are set.
4. the ratio according to claim 1 based on DSP removes formula optical fiber high accuracy frequency measurement sensor, it is characterised in that：It is described
Two groups of optical fiber of fibre-optical probe are same fiber.
5. the ratio according to claim 1 based on DSP removes formula optical fiber high accuracy frequency measurement sensor, it is characterised in that：Also wrap
Include the limitation voltage magnitude circuit for the real-time ratio of the voltage being adjusted between 0~3V.
6. the ratio according to claim 5 based on DSP removes formula optical fiber high accuracy frequency measurement sensor, it is characterised in that：It is described
Analog signal processing module also includes low-pass filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710225336.1A CN107084753A (en) | 2017-04-07 | 2017-04-07 | A kind of ratio based on DSP removes formula optical fiber high accuracy frequency measurement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710225336.1A CN107084753A (en) | 2017-04-07 | 2017-04-07 | A kind of ratio based on DSP removes formula optical fiber high accuracy frequency measurement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107084753A true CN107084753A (en) | 2017-08-22 |
Family
ID=59611253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710225336.1A Pending CN107084753A (en) | 2017-04-07 | 2017-04-07 | A kind of ratio based on DSP removes formula optical fiber high accuracy frequency measurement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107084753A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036806A (en) * | 2017-12-28 | 2018-05-15 | 北京信息科技大学 | A kind of angular displacement based on multi-core optical fiber and angular velocity measurement system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2681083Y (en) * | 2004-02-24 | 2005-02-23 | 华中科技大学 | Fiber bundle displacement transducer |
| CN102967377A (en) * | 2012-11-14 | 2013-03-13 | 中国科学院工程热物理研究所 | Method and device for carrying out non-contact measuring and positioning on surface temperature of rotating blades |
| CN104197967A (en) * | 2014-08-20 | 2014-12-10 | 西北工业大学 | Double-ring coaxial optical fiber turbine flow meter and test method |
| CN104697798A (en) * | 2015-03-05 | 2015-06-10 | 西安交通大学 | System and method for three-dimensional characterization of blade tip gaps and dynamic detection of optical fibers of aero-engine |
| JP2016102689A (en) * | 2014-11-27 | 2016-06-02 | 日本電信電話株式会社 | Optical fiber bent shape measurement device and bent shape measurement method therefor |
| CN206057360U (en) * | 2016-07-29 | 2017-03-29 | 胜利油田顺天节能技术有限公司 | A kind of motor speed parameter detection device |
-
2017
- 2017-04-07 CN CN201710225336.1A patent/CN107084753A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2681083Y (en) * | 2004-02-24 | 2005-02-23 | 华中科技大学 | Fiber bundle displacement transducer |
| CN102967377A (en) * | 2012-11-14 | 2013-03-13 | 中国科学院工程热物理研究所 | Method and device for carrying out non-contact measuring and positioning on surface temperature of rotating blades |
| CN104197967A (en) * | 2014-08-20 | 2014-12-10 | 西北工业大学 | Double-ring coaxial optical fiber turbine flow meter and test method |
| JP2016102689A (en) * | 2014-11-27 | 2016-06-02 | 日本電信電話株式会社 | Optical fiber bent shape measurement device and bent shape measurement method therefor |
| CN104697798A (en) * | 2015-03-05 | 2015-06-10 | 西安交通大学 | System and method for three-dimensional characterization of blade tip gaps and dynamic detection of optical fibers of aero-engine |
| CN206057360U (en) * | 2016-07-29 | 2017-03-29 | 胜利油田顺天节能技术有限公司 | A kind of motor speed parameter detection device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036806A (en) * | 2017-12-28 | 2018-05-15 | 北京信息科技大学 | A kind of angular displacement based on multi-core optical fiber and angular velocity measurement system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109990813B (en) | Fiber grating wavelength demodulating equipment based on broadband tunable light source | |
| CN205957991U (en) | Fiber grating demodulation instrument | |
| CN109120337A (en) | A kind of few mould time-domain reflectomer | |
| CN203642944U (en) | High-speed demodulation system of optical fiber F-P chamber sensor | |
| CN101666689A (en) | Wavelength optimization-type high-performance distributed optical fiber sensing system and sensing method | |
| CN205091068U (en) | Temperature -measuring system of distributed fibers | |
| CN106525256A (en) | Narrow linewidth laser device phase noise measurement device and method | |
| CN103697922A (en) | High-speed demodulation system of optical fiber F-P cavity sensor | |
| CN105444793A (en) | Fiber Bragg raster sensing device based on high-speed pulse laser | |
| WO2019019666A1 (en) | Fibre grating sensing demodulation system | |
| CN104316090B (en) | A kind of temperature self-compensation method of temperature self-compensation high-resolution high frequency optical fiber grating regulating system | |
| CN107436201A (en) | Distributed fiber optic temperature strain sensing system and method based on Brillouin scattering | |
| CN107084753A (en) | A kind of ratio based on DSP removes formula optical fiber high accuracy frequency measurement sensor | |
| CN209605977U (en) | A kind of temperature-measuring system of distributed fibers containing auto-adaptive filter circuit | |
| CN102944696B (en) | Chirped fiber grating sensor and processing method | |
| CN104236698A (en) | Distributed optical fiber vibration sensing system | |
| CN104931080B (en) | A kind of noise separation method based on Fibre Optical Sensor light transmitting and receiving system | |
| CN103217232A (en) | Automatic calibration method and device for attenuation parameters of detection optical cable | |
| CN203929276U (en) | A kind of optical signal detecting disposal system based on resonance technique | |
| CN103326795B (en) | Method for broadband radio-frequency signal correlation detection based on time-spectrum convolution principle | |
| CN111521206B (en) | Wavelength demodulation method for fiber grating edge superposition filtering | |
| CN107579776A (en) | Optical fiber telecommunications system based on free space | |
| CN107843273A (en) | A kind of fiber optic loop sensor-based system and implementation method | |
| CN210071646U (en) | Optical fiber type bimodal imaging system | |
| CN219370000U (en) | Optical path for eliminating echo interference of transmitting end face of FMCW optical fiber laser radar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170822 |
|
| RJ01 | Rejection of invention patent application after publication |