CN209446188U - A kind of electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range - Google Patents
A kind of electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range Download PDFInfo
- Publication number
- CN209446188U CN209446188U CN201920244946.0U CN201920244946U CN209446188U CN 209446188 U CN209446188 U CN 209446188U CN 201920244946 U CN201920244946 U CN 201920244946U CN 209446188 U CN209446188 U CN 209446188U
- Authority
- CN
- China
- Prior art keywords
- module
- programme
- signal conditioning
- temperature
- photoelectric conversion
- 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.)
- Active
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses a kind of electronic systems of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range for being related to cloth Fiber Optic Pyrometer field, optical signalling module is connect with Stcoks photoelectric conversion module, Anti-Stocks photoelectric conversion module respectively, and Stcoks photoelectric conversion module, Anti-Stocks photoelectric conversion module are separately connected one end of the first programme-controlled gain signal conditioning module, the second programme-controlled gain signal conditioning module；First programme-controlled gain signal conditioning module, the second programme-controlled gain signal conditioning module the other end be separately connected data acquisition and processing module；Data acquisition and processing module are connect with industrial computer, for Larger Dynamic temperature-measuring range, the phenomenon that temperature-measuring system of distributed fibers is easy to cause signal to be saturated when measuring high temperature, the scheme synthesized using program-controlled timesharing adjust gain, acquisition time, curve segmentation, efficiently solve the insufficient problem of system thermometric dynamic range, the utility model structure is simple, practical, easy to use and promote.
Description
Technical field
The utility model relates to distributed optical fiber temperature measurement technical field, the distribution of specifically a kind of Larger Dynamic temperature-measuring range
The electronic system of optical fiber temperature measurement system.
Background technique
Temperature-measuring system of distributed fibers (hereinafter referred to as DTS system) is widely used in various fire hazard monitoring scenes, such as highway
The scenes such as tunnel, subway tunnel, the power cable tunnel of electric power power plant, petrochemical industry oil storage tank.DTS system is a kind of based on light
The temperature measurement system that time-domain reflectomer (OTDR) and Raman scattering principle develop, temperature sensor are that optical fiber is (usual
It is fabricated to optical cable), DTS system utilizes the Ramam effect of optical fiber, i.e. optical fiber has been modulated in the temperature field of optical fiber paving location (space)
The backward Raman scattering light of middle transmission can demodulate the real time temperature information in temperature field after photoelectric conversion and signal processing.
DTS system demodulates temperature information according to Raman scattering principle, since Raman diffused light is very faint, usually
Using avalanche diode (APD) be used as photoelectric converter, and avalanche diode generate small-signal amplify, then into
Row data acquisition and processing (DAP).But when system detection temperature range (range) become larger when, such as detection temperature range be -55 °C ~
At 350 °C, since dynamic range is too big, the dynamic range of signal conditioning circuit is inadequate, is easy to cause front end signal saturation then
The still very weak situation of end signal is difficult to meet actual requirement using conventional electronics processing method.
Summary of the invention
The purpose of this utility model is to provide a kind of electronics of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range
System, to solve the problems mentioned in the above background technology.
To achieve the above object, the utility model provides the following technical solutions:
A kind of electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range, including optical signalling module,
It is Stcoks photoelectric conversion module, Anti-Stocks photoelectric conversion module, the first programme-controlled gain signal conditioning module, second program-controlled
Gain signal conditioning module, data acquisition and processing module and industrial computer, the optical signalling module respectively with Stcoks
Photoelectric conversion module, the connection of Anti-Stocks photoelectric conversion module, the Stcoks photoelectric conversion module, Anti-Stocks light
Electric conversion module is separately connected one end of the first programme-controlled gain signal conditioning module, the second programme-controlled gain signal conditioning module；Institute
State the first programme-controlled gain signal conditioning module, the other end of the second programme-controlled gain signal conditioning module be separately connected data acquisition and
Processing module；The data acquisition and processing module are connect with industrial computer.
As a further solution of the present invention: the Stcoks photoelectric conversion module and Anti-Stocks photoelectricity turn
Mold changing block is made of avalanche diode and trsanscondutance amplifier.
The first programme-controlled gain signal conditioning module, the second program-controlled increasing as a further solution of the present invention,
Beneficial signal conditioning module structure having the same, the first programme-controlled gain signal conditioning module, the second programme-controlled gain signal condition mould
Block is made of first order operational amplifier, second level operational amplifier and gain-programmed amplifier, and the first order operation is put
Big device is connect with trsanscondutance amplifier and second level operational amplifier respectively, and second level operational amplifier connects programme-controlled gain amplification
Device；Gain-programmed amplifier is acquired with data and processing module is connect.
As a further solution of the present invention, data acquisition and processing module by the first analog-digital converter,
Second analog-digital converter and FPGA composition.First analog-digital converter, the second analog-digital converter respectively with the first programme-controlled gain
Signal conditioning module is connected with the gain-programmed amplifier of the second programme-controlled gain signal conditioning module, first analog-to-digital conversion
Device, the second analog-digital converter are all connected with FPGA.
The FPGA includes the first data acquisition controller, the second data as a further solution of the present invention,
Acquisition controller, the first data accumulator, the second data accumulator, the first Curves compilation device, the second Curves compilation device, program-controlled increasing
Beneficial controller and data output control unit, first data acquisition controller, the second data acquisition controller are separately connected
First data accumulator and the second data accumulator, the first data accumulator, the second data accumulator are separately connected the first curve
Synthesizer and the second Curves compilation device, one end of the programmed gain control device connects the first Curves compilation device and the second curve closes
It grows up to be a useful person, the other end of programmed gain control device connects the first programme-controlled gain signal conditioning module and the second programme-controlled gain signal condition
Module, the first Curves compilation device and the second Curves compilation device are all connected with data output control unit, and data output control is single
Member connection industrial computer.
Compared with prior art, the utility model has the beneficial effects that being directed to Larger Dynamic temperature-measuring range, distribution type fiber-optic is surveyed
The phenomenon that being easy to cause signal to be saturated when warm systematic survey high temperature uses program-controlled timesharing adjust gain, acquisition time, curve point
The scheme of Duan Hecheng, efficiently solves the insufficient problem of system thermometric dynamic range, and the utility model structure is simple, practicability
By force, easy to use and popularization.
Detailed description of the invention
Fig. 1 is the system structure diagram of the electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range.
Fig. 2 is Stcoks, Anti- in the electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range
Stocks photoelectric conversion module structural schematic diagram.
Fig. 3 is the first, second program-controlled increasing in the electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range
Beneficial signal conditioning module structural schematic diagram.
Fig. 4 is data acquisition and processing mould in the electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range
Block structure schematic diagram.
Fig. 5 is FPGA internal structure signal in the electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range
Figure.
Wherein: optical signalling module 1, Stcoks photoelectric conversion module 21, Anti-Stocks photoelectric conversion module 22,
One programme-controlled gain signal conditioning module 31, the second programme-controlled gain signal conditioning module 32, data acquisition and processing module 4, industry
Computer 5, avalanche diode 201, trsanscondutance amplifier 202, first order operational amplifier 301, second level operational amplifier 302,
Gain-programmed amplifier 303, the first analog-digital converter 41, the second analog-digital converter 42, FPGA43, a data acquisition controller
431, the second data acquisition controller 432, the first data accumulator 433, the second data accumulator 434, the first Curves compilation device
435, the second Curves compilation device 436, programmed gain control device 437, data output control unit 438 form.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1:
Please refer to Fig. 1~5, in the utility model embodiment, a kind of distributed optical fiber temperature measurement system of Larger Dynamic temperature-measuring range
The electronic system of system, including optical signalling module 1, Stcoks photoelectric conversion module 21, Anti-Stocks photoelectric conversion module
22, the first programme-controlled gain signal conditioning module 31, the second programme-controlled gain signal conditioning module 32, data acquisition and processing module 4
With industrial computer 5, the optical signalling module 1 respectively with Stcoks photoelectric conversion module 21, Anti-Stocks photoelectric conversion
Module 22 connects, and the Stcoks photoelectric conversion module 21, that Anti-Stocks photoelectric conversion module 22 is separately connected first is program-controlled
One end of gain signal conditioning module 31, the second programme-controlled gain signal conditioning module 32；The first programme-controlled gain signal condition
Module 31, the second programme-controlled gain signal conditioning module 32 the other end be separately connected data acquisition and processing module 4；The data
Acquisition and processing module 4 are connect with industrial computer 5.
Wherein the function of the optical signalling module 1 is to generate the laser pulse signal for having certain repetition rate, and receive
The reflected Stocks and Anti-Stocks Raman diffused light of laser pulse signal；
The Stcoks photoelectric conversion module 21, Anti-Stocks photoelectric conversion module 22, function are to utilize snowslide two
Pole pipe completes photoelectric conversion, and completes the conversion of electric current to voltage, output simulation weak voltage signals using trsanscondutance amplifier；
The first programme-controlled gain signal conditioning module 31, the second programme-controlled gain signal conditioning module 32, function is point
The weak voltage signals that Jie Shou not be exported from Stcoks photoelectric conversion module 21, Anti-Stocks photoelectric conversion module 22, and
The settable amplification of gain is carried out to the signal, then exports amplified voltage signal；
The data acquisition and processing module 4, function are the gains of timesharing adjustment programme-controlled gain signal conditioning module；
Complete the conversion of analog signal to digital signal；Acquisition time；Data accumulation；Curve segmentation synthesis and data are transferred to industry
The function of computer；
The industrial computer 5, function are to demodulate temperature signal for calculating Raman signal.
Specifically, the Stcoks photoelectric conversion module 21 and Anti-Stocks photoelectric conversion module 22 are by snowslide two
Pole pipe 201 and trsanscondutance amplifier 202 form, and function is to complete photoelectric conversion using avalanche diode 201, and put using mutual conductance
Big device 202 completes the conversion of electric current to voltage, output simulation weak voltage signals.
Specifically, the first programme-controlled gain signal conditioning module 31, the second programme-controlled gain signal conditioning module 32 have
Identical structure, by first order operational amplifier 301, second level operational amplifier 302 and 303 groups of gain-programmed amplifier
At the first order operational amplifier 301 is connect with trsanscondutance amplifier 202 and second level operational amplifier 302 respectively, the second level
Operational amplifier 302 and gain-programmed amplifier 303 connect；Gain-programmed amplifier 303 and the data acquire and handle mould
Block 4 connects, and the first programme-controlled gain signal conditioning module 31, the function of the second programme-controlled gain signal conditioning module 32 are to receive respectively
The weak voltage signals exported from Stcoks photoelectric conversion module 21, Anti-Stocks photoelectric conversion module 22, utilize first
Grade operational amplifier 301, second level operational amplifier 302 are realized being further amplified for voltage signal, and are put using programme-controlled gain
Final amplification under dynamic range needed for 303 realization system of big device, output voltage signal.The gain-programmed amplifier 303 exists
Under low gain mode, so that front voltage signal is met the requirements and back end signal is faint, and front end signal meets application requirement, rear end
Signal is not able to satisfy application requirement；In the high-gain mode, so that voltage signal front end saturation and rear end small-signal is amplified,
Prevent front end signal is from applying, and back end signal can satisfy application requirement.
The gain-programmed amplifier 303, function are can be posted by external equipment (such as FPGA43) its inside
Storage carries out gain setting, and different amplification factors is arranged, so that its gain is sized for the requirement of application.
Specifically, the data acquisition and processing module 4 are by the first analog-digital converter 41,42 and of the second analog-digital converter
FPGA43 composition.First analog-digital converter 41, the second analog-digital converter 42 respectively with the first programme-controlled gain signal condition mould
Block 31 and the connection of the gain-programmed amplifier 303 of the second programme-controlled gain signal conditioning module 32, while it being all connected with FPGA43, function
It can be the gain of timesharing adjustment the first programme-controlled gain signal conditioning module 31 and the second programme-controlled gain signal conditioning module 32；It completes
Conversion of the analog signal to digital signal；Acquisition time；Data accumulation；Curve segmentation synthesis and data are transferred to industrial calculating
The function of machine 5.
Specifically, the FPGA43, inside by the first data acquisition controller 431, the second data acquisition controller
432, the first data accumulator 433, the second data accumulator 434, the first Curves compilation device 435, the second Curves compilation device 436,
Programmed gain control device 437 and data output control unit 438 form, the first data acquisition controller 431, the acquisition of the second data
Controller 432 is separately connected the first data accumulator 433, the second data accumulator 434, the first data accumulator 433, second number
The first Curves compilation device 435 and the second Curves compilation device 436, the programmed gain control device 437 are separately connected according to accumulator 434
One end connect the first Curves compilation device 435 and the second Curves compilation device 436, the other end connection of programmed gain control device 437
First programme-controlled gain signal conditioning module 31 and the second programme-controlled gain signal conditioning module 32, the first Curves compilation device 435
It is all connected with data output control unit 438 with the second Curves compilation device 436, data output control unit 438 connects industrial calculating
Machine 5.
The FPGA43, function are to complete setting, the data acquisition, data accumulation, Curves compilation of timesharing programme-controlled gain
It is transmitted with data.
Programmed gain control device 437 inside the FPGA43, function are for the gain-programmed amplifier to be arranged
Suitable amplification factor is arranged in 303 internal register.
Embodiment 2:
A kind of implementation method of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range, includes the following steps:
The first step, the optical signalling module 1 generates the laser pulse signal for having certain repetition rate, and receives laser arteries and veins
Rush Stocks the and Anti-Stocks Raman diffused light that signal reflex is returned；
Second step, the Stcoks photoelectric conversion module 21, Anti-Stocks photoelectric conversion module 22 complete photoelectric conversion
And tentatively amplify, output simulation weak voltage signals；
Third step, the first programme-controlled gain signal conditioning module 31, the second programme-controlled gain signal conditioning module 32 difference
The weak voltage signals exported from Stcoks photoelectric conversion module 21, Anti-Stocks photoelectric conversion module 22 are received, and complete
Amplify at signal, output voltage signal.
4th step, the data acquisition and processing module 4 receive and come from the first programme-controlled gain signal conditioning module 31, second
The voltage signal that programme-controlled gain signal conditioning module 32 exports, data acquisition, cumulative and transmission.
5th step, the industrial computer 5 analyze Raman data and demodulate temperature signal.
Further, the third step and the 4th step, to realize timesharing programme-controlled gain, the data acquisition, data of signal
Cumulative and Curves compilation implements step are as follows:
3-1 step, the Stcoks photoelectric conversion module 21, the output simulation of Anti-Stocks photoelectric conversion module 22 are micro-
Weak voltage signal；
3-2 step, the data acquisition and processing module 4 adjust the first programme-controlled gain signal conditioning module 31 and the second journey
Control gain signal conditioning module 32 is low gain mode；
3-3 step, the data acquisition and processing module 4 acquire the first programme-controlled gain signal conditioning module 31 and the second journey
The voltage signal that gain signal conditioning module 32 exports is controlled, and completes data accumulation；And export it is cumulative after Stocks curve and
Anti-Stocks curve；
3-4 step, the data acquisition and processing module 4 adjust the first programme-controlled gain signal conditioning module 31 and the second journey
Control gain signal conditioning module 32 is high gain mode；
3-5 step, the data acquisition and processing module 4 acquire the first programme-controlled gain signal conditioning module 31 and the second journey
The voltage signal that gain signal conditioning module 32 exports is controlled, and completes data accumulation；And export it is cumulative after Stocks curve and
Anti-Stocks curve；
3-6 step, the data acquisition and processing module 4 complete the curve of 3-3 step and 3-5 step data accumulation result
Synthesis；
3-7 step, the data of curve of output composite result to the industrial computer 5.
Further, 3-2,3-4 step is to complete first by the programmed gain control device 437 inside the FPGA43
The setting of the gain mode of programme-controlled gain signal conditioning module 31 and the second programme-controlled gain signal conditioning module 32.
3-3,3-5 step, data acquisition and processing module 4 acquire control by the first data inside the FPGA43
Device 431 processed and the second data acquisition controller 432 are respectively completed the first programme-controlled gain signal conditioning module 31 and the second program-controlled increasing
The acquisition for the voltage signal that beneficial signal conditioning module 32 exports；Pass through 433 He of the first data accumulator inside the FPGA43
Second data accumulator 434 completes data accumulation.
Further, the 3-6 step, the method for Curves compilation are as follows:
3-6-1 step, the data acquisition and processing module 4 pass through the first Curves compilation device inside the FPGA43
435, first half, the Stocks of interception 3-5 step accumulation result of the Stocks curve of the accumulation result of interception 3-3 step are bent
Line it is latter half of, be spliced a complete Stocks curve；
3-6-2 step, the data acquisition and processing module 4 pass through the second Curves compilation device inside the FPGA43
436, first half, the interception 3-5 of the Anti-Stocks curve of the accumulation result of interception 3-3 step walk accumulation result
Anti-Stocks curve it is latter half of, be spliced a complete Anti-Stocks curve.
Above-mentioned 3-6-1 and 3-6-2 step, the position of two curves interception, is the same position；According to actual needs, clever
It is living to set the position.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (6)
1. a kind of electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range, including optical signalling module (1),
Stcoks photoelectric conversion module (21), Anti-Stocks photoelectric conversion module (22), the first programme-controlled gain signal conditioning module
(31), the second programme-controlled gain signal conditioning module (32), data acquisition and processing module (4) and industrial computer (5), feature
Be, the optical signalling module (1) respectively with Stcoks photoelectric conversion module (21), Anti-Stocks photoelectric conversion module
(22) it connects, the Stcoks photoelectric conversion module (21), Anti-Stocks photoelectric conversion module (22) are separately connected the first journey
Control one end of gain signal conditioning module (31), the second programme-controlled gain signal conditioning module (32)；The first programme-controlled gain letter
Number conditioning module (31), the second programme-controlled gain signal conditioning module (32) the other end be separately connected data acquisition and processing module
(4)；The data acquisition and processing module (4) are connect with industrial computer (5).
2. the electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range according to claim 1, special
Sign is that the Stcoks photoelectric conversion module (21) and Anti-Stocks photoelectric conversion module (22) are by avalanche diode
(201) it is formed with trsanscondutance amplifier (202).
3. the electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range according to claim 1, special
Sign is that the first programme-controlled gain signal conditioning module (31), the second programme-controlled gain signal conditioning module (32) have identical
Structure, the first programme-controlled gain signal conditioning module (31), the second programme-controlled gain signal conditioning module (32) are transported by the first order
Amplifier (301), second level operational amplifier (302) and gain-programmed amplifier (303) composition, the first order operation is calculated to put
Big device (301) is connect with trsanscondutance amplifier (202) and second level operational amplifier (302) respectively, second level operational amplifier
(302) gain-programmed amplifier (303) are connected；Gain-programmed amplifier (303) is acquired with data and processing module (4) is connect.
4. the electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range according to claim 1, special
Sign is that the data acquisition and processing module (4) are by the first analog-digital converter (41), the second analog-digital converter (42) and FPGA
(43) form, first analog-digital converter (41), the second analog-digital converter (42) respectively with the first programme-controlled gain signal condition
The connection of the gain-programmed amplifier (303) of module (31) and the second programme-controlled gain signal conditioning module (32), first modulus
Converter (41), the second analog-digital converter (42) are all connected with FPGA (43).
5. the electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range according to claim 4, special
Sign is that the FPGA (43) includes the first data acquisition controller (431), the second data acquisition controller (432), the first number
According to accumulator (433), the second data accumulator (434), the first Curves compilation device (435), the second Curves compilation device (436), journey
Control gain controller (437) and data output control unit (438), first data acquisition controller (431), the second data
Acquisition controller (432) is separately connected the first data accumulator (433) and the second data accumulator (434), the first data accumulation
Device (433), the second data accumulator (434) are separately connected the first Curves compilation device (435) and the second Curves compilation device (436).
6. the electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range according to claim 5, special
Sign is that one end of the programmed gain control device (437) connects the first Curves compilation device (435) and the second Curves compilation device
(436), the other end of programmed gain control device (437) connects the first programme-controlled gain signal conditioning module (31) and the second program-controlled increasing
Beneficial signal conditioning module (32), the first Curves compilation device (435) and the second Curves compilation device (436) are all connected with data output
Control unit (438), data output control unit (438) connect industrial computer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920244946.0U CN209446188U (en) | 2019-02-27 | 2019-02-27 | A kind of electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920244946.0U CN209446188U (en) | 2019-02-27 | 2019-02-27 | A kind of electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209446188U true CN209446188U (en) | 2019-09-27 |
Family
ID=68033552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920244946.0U Active CN209446188U (en) | 2019-02-27 | 2019-02-27 | A kind of electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209446188U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708776A (en) * | 2019-02-27 | 2019-05-03 | 上海拜安传感技术有限公司 | A kind of electronic system and its implementation of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range |
| CN117147399A (en) * | 2023-11-01 | 2023-12-01 | 成都派斯光科技有限公司 | Particulate matter concentration measuring device and method |
-
2019
- 2019-02-27 CN CN201920244946.0U patent/CN209446188U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708776A (en) * | 2019-02-27 | 2019-05-03 | 上海拜安传感技术有限公司 | A kind of electronic system and its implementation of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range |
| CN117147399A (en) * | 2023-11-01 | 2023-12-01 | 成都派斯光科技有限公司 | Particulate matter concentration measuring device and method |
| CN117147399B (en) * | 2023-11-01 | 2024-01-26 | 成都派斯光科技有限公司 | Particulate matter concentration measuring device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104101447B (en) | Distributed optical fiber temperature sensor and method for removing nonlinear error of same | |
| CN104748887B (en) | Distributed optical fiber temperature sensor and its demodulating algorithm of temperature three | |
| WO2020034558A1 (en) | High-precision temperature demodulation method oriented toward distributed fiber raman sensor | |
| CN102506904B (en) | Spontaneous Brillouin scattering optical time domain reflectometer based on superconductive nanowire single-proton detector | |
| CN104034409B (en) | Distributed optical fiber vibration sensing method and system based on pulse code external modulation | |
| CN107167168B (en) | Phase sensitive optical time domain reflection distributed optical fiber sensing system accurate positioning method | |
| CN103323215B (en) | A kind of light time domain reflection measuring apparatus and method | |
| CN209446188U (en) | A kind of electronic system of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range | |
| CN102840928A (en) | Online temperature monitoring system and monitoring method for optical fiber composition phase conductor (OPPC) | |
| CN110307920B (en) | Optical fiber temperature and stress sensing system based on noise modulation and measuring method | |
| CN105509868A (en) | Phase-sensitive optical time domain reflectometry fiber distributed sensing system phase calculation method | |
| CN205562071U (en) | Novel distributed optical fiber sensing temperature alarm system | |
| CN105323001A (en) | OTDR optical signal receiving circuit | |
| CN109120337A (en) | A kind of few mould time-domain reflectomer | |
| CN204612831U (en) | Distributed optical fiber temperature sensor | |
| CN103604450A (en) | Seed injection BOTDR distributed optical fiber sensing system | |
| CN203465033U (en) | Brillouin distributed type optical-fiber temperature sensor based on wide-spectrum light source | |
| CN107167228A (en) | Distribution type fiber-optic vibration measuring system and method based on outdoor small span OPPC optical cables | |
| CN102853936A (en) | Remote distributed fiber Raman temperature sensor | |
| CN103033283A (en) | Noise reduction method of distributing type fiber temperature detection system | |
| CN102564481A (en) | Method and device for improving signal-to-noise ratio of distributed optical fiber Brillouin sensor | |
| CN105136429B (en) | A kind of signal supervisory instrument and method for improving optical time domain reflectometer dynamic range | |
| CN103134610A (en) | Distributed fiber temperature detection system with co-processor and implementation method thereof | |
| CN109708776A (en) | A kind of electronic system and its implementation of the temperature-measuring system of distributed fibers of Larger Dynamic temperature-measuring range | |
| CN103049027A (en) | Device and method for controlling electro-optical modulator in phase-sensitive OTDR (Optical Time Domain Reflectometer) sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |