CN207866303U - A kind of fiber F-P many reference amounts Intelligent Flowing Sensor - Google Patents
A kind of fiber F-P many reference amounts Intelligent Flowing Sensor Download PDFInfo
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- CN207866303U CN207866303U CN201820326213.7U CN201820326213U CN207866303U CN 207866303 U CN207866303 U CN 207866303U CN 201820326213 U CN201820326213 U CN 201820326213U CN 207866303 U CN207866303 U CN 207866303U
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- 239000000523 sample Substances 0.000 claims abstract description 136
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- 239000012530 fluid Substances 0.000 claims abstract description 30
- 230000003287 optical Effects 0.000 claims abstract description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 5
- 230000002457 bidirectional Effects 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000011161 development Methods 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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- 230000023298 conjugation with cellular fusion Effects 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
- 230000002706 hydrostatic Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 230000021037 unidirectional conjugation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model is related to a kind of optical fiber F P many reference amounts Intelligent Flowing Sensors, it includes cylindrical probe pedestal, the cylindrical probe base interior is equipped with the first optical fiber F P pressure probes, the second optical fiber F P pressure probes, third optical fiber F P pressure probes and various surgical grade stainless steels, the cylindrical probe pedestal is connected by optical cable with modulation /demodulation module, and modulation /demodulation module communication interface is provided in the modulation /demodulation module.For the shortcomings of of high cost present in prior art, volume is big, installation is difficult, precision is low, low-response, the utility model proposes a kind of optical fiber F P many reference amounts Intelligent Flowing Sensor schemes, 4 flow velocity, flow direction, pressure and temperature parameters of pipeline fluid are measured simultaneously, above-mentioned 4 parameters are extracted by modulation-demodulation device mutually to assist correcting, optimization calculates, it realizes minimizing, is intelligent, being integrated and practical in high precision for flow sensor, holds the trend of Sensor Technology Development.
Description
Technical field
The utility model is related to a kind of flow sensors, and in particular to a kind of fiber F-P (Fabry-Perot, Fabry-
Perot) many reference amounts Intelligent Flowing Sensor and measurement method.
Background technology
The fast development of modern science and technology makes human society change from intense industrialization to informationization.Its marrow is
The productive consumption activity that the motion of matter and energy movement and human society of optimization physical world are converted by information, provides more
The products ＆ services of high-quality so that production process and process of consumption are more efficient, more intelligently, to promote economic society
Digitlization transition.Sensor is perception, obtains, the window of detection and transitional information, is the major technique for realizing the information age
Basis becomes one of the commanding elevation that 21 century people fight in terms of hi-tech development, and countries nowadays are all by sensor technology
It is considered as the key of modern high technology development.
Pipeline flow measurement is one important application of industrial circle, be primarily present currently on the market it is mechanical, heat-conducted,
The flow sensor of the different principles such as electromagnetic type, ultrasonic type.But existing flow measurement solution have the shortcomings that it is different,
Middle mechanical flow switch measurement accuracy is not high, and the heat-conducted flow sensor service life is shorter, high failure rate, responds slower, electromagnetism
Formula and ultrasonic type flow sensor manufacturing cost are high, the larger installation of sensor bulk is inconvenient, O＆M cost is high.
It is developed rapidly as the relevant technologies such as optical-fibre communications and Fibre Optical Sensor develop, optical fiber sensing technology is because of its sensitivity
Height, high resolution, small, light-weight, high temperature resistant, anticorrosive, electromagnetism interference and can be reliable under inflammable and explosive environment
The technical advantages such as work are shown one's talent, and research hotspot is become.
Current common phase modulation-type optic flow sensor has Michelson (Michelson) interference-type (see patent
CN 106483329) and Fabry-Perot (Fabry-Perot) interference-type flow sensor.Michelson (Michelson)
Optical fiber used in interference-type optical fiber flow sensor is more, makes, use and installation accuracy require very high, palpus two light of strict guarantee
The intensity of beam is equal and two channels experience same environment and do not experience same strain, and actual installation precision, which is difficult to control, leads to this
Type sensor measures unstable, by environment to being affected, limits the application of the type sensor.F-P type optical fiber streams
Quantity sensor detected using simple optical fiber, using beam interference it is measured, avoid double joint optical fiber matching the problem of, structure
Simply, small, easy for installation, high reliability is highly sensitive, quick response.
Utility model content
In industry spot practical application, while measuring pipeline flow, the information such as manifold pressure and temperature are also often
Need the parameter paid close attention to., installation hardly possible big for of high cost present in prior art, volume, the low, low-response of precision etc. are scarce
Point, the utility model proposes a kind of fiber F-P many reference amounts Intelligent Flowing Sensor schemes, while measuring the stream of pipeline fluid
4 speed, flow direction, pressure and temperature parameters, extract above-mentioned 4 parameters by modulation-demodulation device and mutually assist correcting, optimization meter
It calculates, realizes minimizing, is intelligent, being integrated and practical in high precision for flow sensor, hold becoming for Sensor Technology Development
Gesture.
In order to solve the above-mentioned technical problem, the utility model proposes following technical schemes：A kind of fiber F-P many reference amounts intelligence
Flow sensor, it includes cylindrical probe pedestal, and the cylindrical probe base interior is equipped with the spy of the first fiber F-P pressure
Head, the second fiber F-P pressure probe, third fiber F-P pressure probe and various surgical grade stainless steels, the cylindrical probe pedestal are logical
It crosses optical cable with modulation /demodulation module to be connected, modulation /demodulation module communication interface is provided in the modulation /demodulation module.
The first fiber F-P pressure probe and third fiber F-P pressure probe are arranged in cylindrical probe pedestal both sides
It is arranged symmetrically；The second fiber F-P pressure probe and various surgical grade stainless steels are arranged at the top of cylindrical probe pedestal,
In the second fiber F-P pressure probe be located at top center.
First sensor probe optical fiber interface is provided on the cylindrical probe pedestal, second sensor probe optical fiber connects
Mouth, 3rd sensor probe optical fiber interface and the 4th sensor probe optical fiber interface；The first sensor probe optical fiber interface
It is connected with the first fiber F-P pressure probe by optical fiber；The second sensor probe optical fiber interface passes through optical fiber and the second light
Fine F-P pressure probes are connected；The 3rd sensor probe optical fiber interface passes through optical fiber and third fiber F-P pressure probe phase
Even；The 4th sensor probe optical fiber interface is connected by optical fiber with various surgical grade stainless steels；In the tail of cylindrical probe pedestal
Portion's outer rim is provided with connection external screw thread, and the connection screw thread is connected with the shell of modulation /demodulation module by screw thread.
The first modulation /demodulation module optical fiber interface, the second modulation /demodulation module optical fiber are provided in the modulation /demodulation module
Interface, third modulation /demodulation module optical fiber interface and the 4th modulation /demodulation module optical fiber interface；The first modulation /demodulation module
Optical fiber interface is directly connected by optical cable with the first sensor of cylindrical probe pedestal probe optical fiber interface；Second modulation
Demodulation module optical fiber interface is directly connected by optical cable with the second sensor of cylindrical probe pedestal probe optical fiber interface；It is described
Third modulation /demodulation module optical fiber interface directly passes through the 3rd sensor of optical cable and cylindrical probe pedestal probe optical fiber interface
It is connected；The 4th modulation /demodulation module optical fiber interface directly passes through the 4th sensor probe of optical cable and cylindrical probe pedestal
Optical fiber interface is connected.
The cylindrical probe pedestal includes that one end of four probes is mounted on inside the horizontal pipe containing bidirectional fluid
Or inside the vertical pipeline of bidirectional fluid.
The modulation /demodulation inside modules are provided with computation analysis module.
The utility model has the advantages that：
1, it is apparent that a kind of fiber F-P many reference amounts Intelligent Flowing Sensor advantage is addressed in the utility model, is based on F-P optical fiber
Probe is made, small, and precision is high, easy for installation, can monitor bidirectional fluid, and be suitable for horizontal direction and vertical direction pipe
Road.
2, the various surgical grade stainless steels of integral measuring temperature provide temperature parameters, and can be used for correcting pressure measurement errors, lead to
Cross mating modulation /demodulation connection device, be made integral type or split type flow sensor, output flow, flow to digital quantity signal or
On-off model.
3, modulation /demodulation module is received and is demodulated from three fiber F-P pressure probe signals, demodulates institute's pressure measurement respectively
Power numerical value P1、P2、P3Analysis and distinguishing is carried out by counting circuit, according to P1、P2、P3Three's numerical values recited carries out computational discrimination flow direction
And flow velocity.
4, after the utility model calculates fluid flow rate size and Orientation, flow velocity size and fluid temperature (F.T.) can be exported outward
Many reference amounts digital signal also can export the switching value of a pair of of normally-open normally-close contact by setting definite value after flow velocity is more than definite value
Signal, for the needs under different industrial applications.
5, the difference under level/vertical direction pipeline operating mode flows to fluid flow rate measurement process.Lower of horizontal pipe operating mode
Sensor is adapted for mount to pipeline side, is totally submerged in fluid convenient for probe.Under level/vertical pipeline operating mode, can it survey
Two-way flow velocity is measured, full packages is measured more acurrate.Simple in structure, easy for installation, probe impact resistance, corrosion-resistant is applied widely
It is general.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the cylindrical probe pedestal front view of the utility model.
Fig. 2 is the cylindrical probe pedestal vertical view of the utility model.
Fig. 3 is the integral type flow sensor Integral connection structure schematic diagram of the utility model.
Fig. 4 is the split type flow sensor Integral connection structure schematic diagram of the utility model.
Fig. 5 is that the sensor of the utility model is used for the structural schematic diagram that horizontal pipe measures.
Fig. 6 is that the sensor of the utility model is used for the structural schematic diagram that vertical pipeline measures.
Fig. 7 is the fiber F-P many reference amounts Intelligent Flowing Sensor operation principle of the utility model.
In figure：First fiber F-P pressure probe 1, the second fiber F-P pressure probe 2, third fiber F-P pressure probe 3,
Various surgical grade stainless steels 4, cylindrical probe pedestal 5, optical cable 6, modulation /demodulation module 7, modulation /demodulation module communication interface 8；
First sensor probe optical fiber interface 5-1, second sensor probe optical fiber interface 5-2,3rd sensor probe light
Fine interface 5-3, the 4th sensor probe optical fiber interface 5-4, connection screw thread 5-5；
First modulation /demodulation module optical fiber interface 7-1, the second modulation /demodulation module optical fiber interface 7-2, third modulation /demodulation
Module optical fiber interface 7-3, the 4th modulation /demodulation module optical fiber interface 7-4.
Specific implementation mode
The embodiment of the utility model is described further below in conjunction with the accompanying drawings.
Embodiment 1：
Picture 1-4, a kind of fiber F-P many reference amounts Intelligent Flowing Sensor, it includes cylindrical probe pedestal 5, the circle
First fiber F-P pressure probe 1, the second fiber F-P pressure probe 2, third fiber F-P are installed inside cylinder probe pedestal 5
Pressure probe 3 and various surgical grade stainless steels 4, the cylindrical probe pedestal 5 is connected by optical cable 6 with modulation /demodulation module 7, described
Modulation /demodulation module communication interface 8 is provided in modulation /demodulation module 7.
Further, the fiber F-P many reference amounts Intelligent Flowing Sensor can design according to actual needs it is integrated and
Split type two kinds of forms, for integral sensor convenient for now distributed controll, split type sensor is centralized and unified convenient for Signal Terminal
Management.Split type fiber F-P many reference amounts Intelligent Flowing Sensor is by sensor probe cylindrical base 5 and modulation /demodulation module 7
It is connected directly, reduces intermediate fibres interface and connection optical cable.
Further, the first fiber F-P pressure probe 1 and the setting of third fiber F-P pressure probe 3 are visited in cylinder
5 both sides of head pedestal are arranged symmetrically；The second fiber F-P pressure probe 2 and various surgical grade stainless steels 4 are arranged in cylindrical probe
The top of pedestal 5, wherein the second fiber F-P pressure probe 2 is located at top center.
Further, first sensor probe optical fiber interface 5-1, the second biography are provided on the cylindrical probe pedestal 5
Sensor probe optical fiber interface 5-2,3rd sensor probe optical fiber interface 5-3 and the 4th sensor probe optical fiber interface 5-4；It is described
First sensor probe optical fiber interface 5-1 is connected by optical fiber with the first fiber F-P pressure probe 1；The second sensor is visited
Head optical fiber interface 5-2 is connected by optical fiber with the second fiber F-P pressure probe 2；The 3rd sensor probe optical fiber interface 5-3
It is connected with third fiber F-P pressure probe 3 by optical fiber；The 4th sensor probe optical fiber interface 5-4 passes through optical fiber and light
Fine temp probe 4 is connected；The trailing outer edges of cylindrical probe pedestal 5 are provided with connection external screw thread 5-5, the connection screw thread 5-
5 are connected with the shell of modulation /demodulation module 7 by screw thread.
Further, the first modulation /demodulation module optical fiber interface 7-1, the second tune are provided in the modulation /demodulation module 7
Demodulation module optical fiber interface 7-2, third modulation /demodulation module optical fiber interface 7-3 and the 4th modulation /demodulation module optical fiber interface 7- processed
4；The first modulation /demodulation module optical fiber interface 7-1 is directly visited by the first sensor of optical cable and cylindrical probe pedestal 5
Head optical fiber interface 5-1 is connected；The second modulation /demodulation module optical fiber interface 7-2 directly passes through optical cable and cylindrical probe pedestal
5 second sensor probe optical fiber interface 5-2 is connected；The third modulation /demodulation module optical fiber interface 7-3 directly passes through optical cable
It is connected with the 3rd sensor of cylindrical probe pedestal 5 probe optical fiber interface 5-3；The 4th modulation /demodulation module optical fiber interface
7-4 is directly connected by optical cable with the 4th sensor probe optical fiber interface 5-4 of cylindrical probe pedestal 5.
Further, the cylindrical probe pedestal 5 includes that one end of four probes is mounted on the water containing bidirectional fluid
Inside flat pipeline or inside the vertical pipeline of bidirectional fluid.And then easily realize that pipeline flow laterally or vertically is surveyed
Amount.
Further, the modulation /demodulation module 7 is internally provided with computation analysis module.Pass through the modulatedemodulate mode transfer
Block 7 can will be received from the first fiber F-P pressure probe 1, the second fiber F-P pressure probe 2, third fiber F-P pressure
Power is popped one's head in 3 three pressure probe signals；Temperature parameter can be used for assisting as needed correcting pressure parameter, also can be separately as
Fluid temperature (F.T.) parameter.
As the operation principle of Fig. 5-7, the fiber F-P many reference amounts Intelligent Flowing Sensor are：
Step1：According to bernoulli principle and volume flow conservation principle, i.e. perfect fluid does the steady motion of a fluid in same flow tube
When dynamic, at the different cross section of same flow tube, the sum of the kinetic energy of per unit volume fluid, enabled, pressure are a constant, volume flow
It is equal, establish following expression：
Bernoulli principle：
Volume flow conservation principle：
Sv=B (02)
In formula：Every to indicate that unit hydrostatic pressure energy, kinetic energy, potential energy, P are the static pressure that certain in fluid is put respectively, v is should
The fluid flow rate of point, h are gravity elevation of this away from liquid level, and ρ is the density of fluid, and S accumulates for this pipeline radial section, A, B
All it is constant；
Step2：The first fiber F-P pressure probe 1, the second fiber F-P pressure probe 2, third fiber F-P pressure is set to visit
The static pressure that different location measures at first 3 same fluids within pipes three is respectively P1、P2、P3, flow velocity is respectively v1、v2、v3, potential energy
Respectively ρ gh1、ρgh2、ρgh3, according to Bernoulli equation, there is following equation to set up：
Step3：In view of sensor bulk is smaller, the first fiber F-P pressure probe 1, the second fiber F-P pressure probe 2,
Potential energy difference caused by 3 three position difference of third fiber F-P pressure probe is negligible, therefore (03) formula is reduced to：
Step4：When fluid flow direction is from the first fiber F-P pressure probe 1 to third fiber F-P pressure probe 3, then
Since cylinder is popped one's head in choked flow effect, flow velocity v at the first fiber F-P pressure probe 11=0, at the second fiber F-P pressure probe 2
Flow velocity is fluids within pipes flow velocity；According to (02) formula flow conservation principle, it is known that fluid stream backward visit by third fiber F-P pressure
Flow velocity v at first 33Less than v2, it is derived by by (04) formula：
v2＞ v3＞ v1=0 (05)
P1＞ P3＞ P2 (06)
Step5：When fluid flow direction is from third fiber F-P pressure probe 3 to the first fiber F-P pressure probe 1, then
Since cylinder is popped one's head in choked flow effect, flow velocity v at third fiber F-P pressure probe 33=0, at the second fiber F-P pressure probe 2
Flow velocity is fluids within pipes flow velocity；According to (02) formula flow conservation principle, it is known that fluid stream backward visit by the first fiber F-P pressure
Flow velocity v at head (1)1Less than v2, it is derived by by (04) formula：
v2＞ v1＞ v3=0 (08)
P3＞ P1＞ P2 (09)
Step6：It is visited by the first fiber F-P pressure probe 1, the second fiber F-P pressure probe 2, third fiber F-P pressure
The pressure data P that first 3 three measures1、P2、P3, you can flow velocity v and flow direction in pipeline is calculated：
Work as P1=P2=P3, then v=0, fluids within pipes do not flow；
Work as P1>P3>P2, thenThird fiber F-P pressure probe 3 is flowed to from the first fiber F-P pressure probe 1；
Work as P3>P1>P2, thenThe first fiber F-P pressure probe 1 is flowed to from third fiber F-P pressure probe 3；
Step7：After calculating fluid flow rate size and Orientation, many reference amounts of flow velocity size and fluid temperature (F.T.) can be exported outward
Digital signal also can export the on-off model of a pair of of normally-open normally-close contact by setting definite value after flow velocity is more than definite value, with
For the needs under different industrial applications.
Through the above description, those skilled in the art completely can be without departing from this item utility model technological thought
In the range of, it carries out various changes and amendments and is within the protection scope of the utility model.The utility model is not use up
Matters belong to the common knowledge of those skilled in the art.
Claims (6)
1. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor, it is characterised in that：It includes cylindrical probe pedestal（5）, described
Cylindrical probe pedestal（5）Inside is equipped with the first fiber F-P pressure probe（1）, the second fiber F-P pressure probe（2）, third
Fiber F-P pressure probe（3）And various surgical grade stainless steels（4）, the cylindrical probe pedestal（5）Pass through optical cable（6）With modulatedemodulate
Mode transfer block（7）It is connected, the modulation /demodulation module（7）On be provided with modulation /demodulation module communication interface（8）.
2. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor according to claim 1, it is characterised in that：Described first
Fiber F-P pressure probe（1）With third fiber F-P pressure probe（3）It is arranged in cylindrical probe pedestal（5）Both sides are in symmetrical cloth
It sets；The second fiber F-P pressure probe（2）And various surgical grade stainless steels（4）It is arranged in cylindrical probe pedestal（5）Top,
Wherein the second fiber F-P pressure probe（2）Positioned at top center.
3. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor according to claim 1, it is characterised in that：The cylinder
Shape probe base（5）On be provided with first sensor probe optical fiber interface（5-1）, second sensor pop one's head in optical fiber interface（5-2）、
3rd sensor probe optical fiber interface（5-3）With the 4th sensor probe optical fiber interface（5-4）；The first sensor probe light
Fine interface（5-1）Pass through optical fiber and the first fiber F-P pressure probe（1）It is connected；The second sensor probe optical fiber interface（5-
2）Pass through optical fiber and the second fiber F-P pressure probe（2）It is connected；The 3rd sensor probe optical fiber interface（5-3）Pass through light
Fine and third fiber F-P pressure probe（3）It is connected；The 4th sensor probe optical fiber interface（5-4）Pass through optical fiber and optical fiber
Temp probe（4）It is connected；In cylindrical probe pedestal（5）Trailing outer edges be provided with connection external screw thread（5-5）, the connection spiral shell
Line（5-5）With modulation /demodulation module（7）Shell by screw thread be connected.
4. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor according to claim 1, it is characterised in that：The modulation
Demodulation module（7）On be provided with the first modulation /demodulation module optical fiber interface（7-1）, the second modulation /demodulation module optical fiber interface（7-
2）, third modulation /demodulation module optical fiber interface（7-3）With the 4th modulation /demodulation module optical fiber interface（7-4）；First modulation
Demodulation module optical fiber interface（7-1）Directly pass through optical cable and cylindrical probe pedestal（5）First sensor pop one's head in optical fiber interface
（5-1）It is connected；The second modulation /demodulation module optical fiber interface（7-2）Directly pass through optical cable and cylindrical probe pedestal（5）'s
Second sensor probe optical fiber interface（5-2）It is connected；The third modulation /demodulation module optical fiber interface（7-3）Directly pass through optical cable
With cylindrical probe pedestal（5）3rd sensor pop one's head in optical fiber interface（5-3）It is connected；The 4th modulation /demodulation module optical fiber
Interface（7-4）Directly pass through optical cable and cylindrical probe pedestal（5）The 4th sensor probe optical fiber interface（5-4）It is connected.
5. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor according to claim 1, it is characterised in that：The cylinder
Shape probe base（5）Including one end of four probes are mounted on inside horizontal pipe containing bidirectional fluid or bidirectional fluid
Inside vertical pipeline.
6. a kind of fiber F-P many reference amounts Intelligent Flowing Sensor according to claim 1, it is characterised in that：The modulation
Demodulation module（7）It is internally provided with computation analysis module.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225448A (en) * | 2018-03-09 | 2018-06-29 | 中国长江电力股份有限公司 | A kind of fiber F-P many reference amounts Intelligent Flowing Sensor and measuring method |
| CN111307209A (en) * | 2020-02-25 | 2020-06-19 | 河海大学 | Detection device for monitoring water leakage flow direction in underground water observation well |
| CN114320466A (en) * | 2021-12-17 | 2022-04-12 | 中煤科工集团重庆研究院有限公司 | Distributed long-time power supply multi-parameter intelligent sensor with split type framework |
| WO2022105391A1 (en) * | 2020-09-14 | 2022-05-27 | 湖南明康中锦医疗科技发展有限公司 | Temperature and humidity sensor mounting structure and respiratory support device |
-
2018
- 2018-03-09 CN CN201820326213.7U patent/CN207866303U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225448A (en) * | 2018-03-09 | 2018-06-29 | 中国长江电力股份有限公司 | A kind of fiber F-P many reference amounts Intelligent Flowing Sensor and measuring method |
| CN111307209A (en) * | 2020-02-25 | 2020-06-19 | 河海大学 | Detection device for monitoring water leakage flow direction in underground water observation well |
| WO2022105391A1 (en) * | 2020-09-14 | 2022-05-27 | 湖南明康中锦医疗科技发展有限公司 | Temperature and humidity sensor mounting structure and respiratory support device |
| CN114320466A (en) * | 2021-12-17 | 2022-04-12 | 中煤科工集团重庆研究院有限公司 | Distributed long-time power supply multi-parameter intelligent sensor with split type framework |
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