CN209432288U - The online Subarea calibration device of DTS based on wireless temperature acquisition unit - Google Patents
The online Subarea calibration device of DTS based on wireless temperature acquisition unit Download PDFInfo
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- CN209432288U CN209432288U CN201822163105.5U CN201822163105U CN209432288U CN 209432288 U CN209432288 U CN 209432288U CN 201822163105 U CN201822163105 U CN 201822163105U CN 209432288 U CN209432288 U CN 209432288U
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- dts
- temperature
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- acquisition unit
- sensor fibre
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Abstract
The utility model relates to the online Subarea calibration devices of DTS based on wireless temperature acquisition unit, including the sensor fibre laid along pipeline path to be detected, the DTS host being connect with sensor fibre；Several are distributed the wireless temperature collecting device for being embedded in the sensor fibre region, the wireless signal receiver connecting with DTS host.The utility model has the beneficial effects that solving the influence of link attenuation, different location environmental change to thermometric by subregion, accurate, online correction is carried out to fiducial temperature by finely dividing search coverage；Real-time detection simultaneously periodically automatically updates fiducial temperature data, avoids artificial calibration fiducial temperature, saves manpower and improve accuracy.
Description
Technical field
The utility model belongs to temperature sensor technology field more particularly to a kind of DTS based on wireless temperature acquisition unit
Online Subarea calibration device.
Background technique
Distributed Optical Fiber Sensing Techniques have large capacity, long range, high-precision, anti-interference etc. first as novel sensor
Its advantage, quickly grows in recent years.Wherein, distributed optical fiber temperature sensing system (DTS) is the most successful representative of commercialization, it
It is the distributed monitoring realized based on temperature sensitlzing effect (temperature difference) to linear assets (such as cable, tunnel, pipeline), in fire
The application scenarios such as calamity monitoring, high-temp liquid leakage and high pressure gas leakage play a role.
DTS uses information carrier of the spontaneous back-scattering light as temperature variation, passes through the change of backscattering luminous intensity
Change the variable quantity for carrying out reaction temperature.Therefore in DTS system, the calibration of fiducial temperature directly determines distributed optical fiber sensing system
The accuracy of temperature sensing.Currently used temperature calibration method is using the optical fiber of detection optical fiber front end certain length as reference
Unit is placed in thermostat, and steady temperature T0 set by this thermostat is calculated as fiducial temperature by host computer
Obtain the resolution temperature T on optical fiber link are as follows:
Wherein: h is Planck's constant, and c is the light velocity in vacuum, and k is Boltzmann constant, and Δ γ is offset beam, R
(T) the ratio between the anti-Stokes that detects and Stokes light intensity when being temperature T, R (T0) be by benchmark temperature of T0 it is anti-this
The ratio between lentor and Stokes light intensity.
When temperature change occurs for fiducial temperature point, fiducial temperature can not automatically update general temperature calibration method, need
Re-start the artificial calibration of fiducial temperature.In addition, fiducial temperature is set in optical fiber front end on optical fiber link, since engineering is answered
The temperature parsing precision of the presence of a variety of decaying in, optical fiber link distal end will be unable to guarantee.In view of the above problems, proposing to spy
It surveys path and carries out subregion, full link subregion on-line correction is realized using wireless temperature acquisition unit.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of for the survey of room temperature feed-line distribution type fiber-optic
Warm device, it is therefore an objective to improve system temperature parsing precision, real time automatic update data improve system reliability, improve DTS and are disliking
Thermometric performance under bad engineering-environment is conducive to the further genralrlization application of optical fiber sensing technology.
The technical solution of the utility model are as follows:
The online Subarea calibration device of DTS based on wireless temperature acquisition unit, including what is laid along pipeline path to be detected
Sensor fibre, the DTS host being connect with sensor fibre；The wireless temperature that several distributions are embedded in the sensor fibre region is adopted
Acquisition means, the wireless signal receiver being connect with DTS host.
Compared to the prior art, design of this programme based on real time partitioned temperature correction devises correction calibration temperature
Sensor fibre is divided into several areas by method, and each area is arranged a temperature collecting device, collected temperature information is transmitted
To DTS host, DTS host by current temperature signal in the same area compared with the temperature signal that a upper clock receives, correct,
Update the fiducial temperature parameter value in each subregion.The technical program is using high-precision (0.2 DEG C) wireless temperature acquisition unit to DTS
Carry out real time partitioned temperature correction, have many advantages, such as to automatically correct, real-time and serious forgiveness it is high,
Based on above scheme, the utility model is also made that following improvement:
Further, when the sensor fibre has inflection point, a temperature acquisition region is at least set between two inflection points.This
In technological improvement, when there is inflection point on optical fiber link, at least one subregion is needed between two inflection points, such as: detection range 12km
When can be by the way of mono- subregion of 2km, due to the presence of inflection point, distance is less than 2km between two inflection points, needs two
It is divided into a subregion between inflection point, buries a wireless temperature acquisition list device.The embedded density of wireless temperature acquisition unit 4
The accuracy for influencing whether fiducial temperature on optical fiber link influences following temperature parsing precision, according to circumstances suitably divides subregion
Number.
Further, the temperature collecting device includes temp probe and wireless signal transmitting device, the temp probe
Burial place is located at the center of each subregion and close to sensor fibre.It is accurate in order to avoid fiducial temperature during this technology is improved
Fixed, temp probe is set to the center in each region, and close to sensor fibre.
Further, the temp probe uses waterproof and dampproof stainless steel material, and it is outer that protection is cased with outside the temp probe
Set.During this technology is improved, in the case that protective coat is mainly used for bad environments.
The utility model has the beneficial effects that solving link attenuation, different location environmental change to the shadow of thermometric by subregion
It rings, carries out accurate, online correction to fiducial temperature by finely dividing search coverage；Real-time detection simultaneously periodically automatically updates base
Quasi- temperature data avoids artificial calibration fiducial temperature, saves manpower and improve accuracy.
Detailed description of the invention
Fig. 1 is utility model system structure diagram.
In figure, 1, DTS host；2, reception of wireless signals unit；3, sensor fibre；4, wireless temperature acquisition unit.
Specific embodiment
As shown in Figure 1, the online Subarea calibration device of DTS based on wireless temperature acquisition unit, comprising:
DTS host 1 parses host for Fibre Optical Sensor, main to realize data parsing, algorithm process, temperature demodulation etc.；
Wireless signal receiver 2, it is wireless with temperature information for receive that wireless signal transmitting device is transmitted back to
Signal simultaneously transmits a signal to the subsequent data processing of DTS host progress；
Sensor fibre 3, along detection piping laying.
Wireless temperature collecting device 4, including temp probe and wireless signal transmitting device two parts, it is embedded along pipeline link
Several, temp probe is embedded in by detection optical fiber, carries out temperature sensing, and wireless signal transmitting device detects temp probe
Signal with temperature information is transmitted to wireless signal receiver 2.Wireless temperature collecting device 4 is in the path of sensor fibre 3
It is upper to use the inbuilt mode of subregion, it is embedded in the center of each subregion, when there is inflection point on optical fiber link, between two inflection points
Need at least one subregion.Wireless signal transmitting device is powered using battery, by GPRS technology transfer data, due to data
It is big to send power consumption, can set data transmission time interval by the way of clock wake-up, reduce the transmission times of data,
Such as: can set and transmit a temperature data every 2h.It can also be using solar battery etc. when being spaced smaller between when desired
Mode charge to equipment.
The specific course of work are as follows: sensor fibre 3 is laid along pipeline path to be detected, by several wireless temperature acquisitions
The temp probe subregion of device 4 is embedded in around sensor fibre, and the temperature information that several temp probes detect is by corresponding to
Wireless signal transmitting device coded excitation, wireless signal receiver 2 receive these have zone temperature information wireless communications
Number, and by signal resolution, be converted into corresponding electric signal, DTS host 1 is uploaded to by serial ports or USB interface, DTS host 1 will
It is compared, corrects when the temperature signal of previous group is same as above the temperature signal that a clock receives, and update in each subregion
Fiducial temperature parameter value, DTS host 1 calculate on optical fiber link different points by the formula with each subregion fiducial temperature parameter
The temperature curve and synthesis display in area are in upper computer software；If the fiducial temperature of each subregion is Ti, i=0,1,2 ... N-1, by
This obtained each subregion pipeline detection temperature curve ti, i=0,1,2 ... N-1, calculation formula is as follows,
Wherein, h is Planck's constant, and c is the light velocity in vacuum, and k is Boltzmann constant, and Δ γ is offset beam, R
(Ti) it is in the i-th subregion with TiFor the ratio between the anti-Stokes of benchmark temperature and Stokes light intensity, R (ti) it is t in i subregioniTemperature
The ratio between the anti-Stokes detected under degree and Stokes light intensity.
Claims (4)
1. the online Subarea calibration device of DTS based on wireless temperature acquisition unit, including the biography laid along pipeline path to be detected
Photosensitive fibre, the DTS host being connect with sensor fibre；It is characterized by also including several distributions to be embedded in the sensor fibre
The wireless temperature collecting device in region, the wireless signal receiver being connect with DTS host.
2. the online Subarea calibration device of the DTS according to claim 1 based on wireless temperature acquisition unit, feature exist
In: the temperature collecting device includes temp probe and wireless signal transmitting device, and the temp probe burial place is located at every
The center of a subregion and close to sensor fibre.
3. the online Subarea calibration device of the DTS according to claim 1 based on wireless temperature acquisition unit, feature exist
In: when the sensor fibre has inflection point, a temperature acquisition region is at least set between two inflection points.
4. the online Subarea calibration device of the DTS according to claim 1 based on wireless temperature acquisition unit, feature exist
In: the temp probe uses waterproof and dampproof stainless steel material, and protective coat is cased with outside the temp probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822163105.5U CN209432288U (en) | 2018-12-21 | 2018-12-21 | The online Subarea calibration device of DTS based on wireless temperature acquisition unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822163105.5U CN209432288U (en) | 2018-12-21 | 2018-12-21 | The online Subarea calibration device of DTS based on wireless temperature acquisition unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209432288U true CN209432288U (en) | 2019-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822163105.5U Withdrawn - After Issue CN209432288U (en) | 2018-12-21 | 2018-12-21 | The online Subarea calibration device of DTS based on wireless temperature acquisition unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540300A (en) * | 2018-12-21 | 2019-03-29 | 青岛汇安谷科技发展有限公司 | The online Subarea calibration method and device of DTS based on wireless temperature acquisition unit |
-
2018
- 2018-12-21 CN CN201822163105.5U patent/CN209432288U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540300A (en) * | 2018-12-21 | 2019-03-29 | 青岛汇安谷科技发展有限公司 | The online Subarea calibration method and device of DTS based on wireless temperature acquisition unit |
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Granted publication date: 20190924 Effective date of abandoning: 20210512 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190924 Effective date of abandoning: 20210512 |