CN108717051A - A kind of TDLAS is combined the apparatus and method of survey heating value of natural gas with optoacoustic spectroscopy - Google Patents
A kind of TDLAS is combined the apparatus and method of survey heating value of natural gas with optoacoustic spectroscopy Download PDFInfo
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- CN108717051A CN108717051A CN201810601023.6A CN201810601023A CN108717051A CN 108717051 A CN108717051 A CN 108717051A CN 201810601023 A CN201810601023 A CN 201810601023A CN 108717051 A CN108717051 A CN 108717051A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
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- Investigating Or Analysing Materials By Optical Means (AREA)
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Abstract
The invention discloses a kind of TDLAS to be combined the apparatus and method for surveying heating value of natural gas with optoacoustic spectroscopy, including pipeline and detection case, the both sides of the detection case are communicated with the first promotion box, the inside of the detection case is fixedly connected with partition board, it is fixedly connected with elastic membrane between the top of the partition board and the top for detecting box cavity, the top of the partition board and it is fixedly connected with laser emitter positioned at the inside of elastic membrane, relates to optical measuring device technical field.The TDLAS is combined the apparatus and method for surveying heating value of natural gas with optoacoustic spectroscopy, an independent small space can be separated by the way that elastic membrane is arranged, utilize the cooperation of the first electric telescopic rod and clamping plate, it can be by elastic membrane top closure, after being separated with the big pipeline of natural gas, even if because electric leakage causes to catch fire, it will not influence the natural gas in big pipeline, and the cooperation of laser emitter and laser pickoff is utilized, and it conveniently can accurately detect the calorific value of natural gas, it is safe and precisely efficient.
Description
Technical field
The present invention relates to optical measuring device technical field, specially a kind of TDLAS is combined with optoacoustic spectroscopy surveys natural gas
The apparatus and method of calorific value.
Background technology
Natural gas refers to a naturally occurring tangential gas in nature, including in atmospheric thermodynamics, hydrosphere and lithosphere it is various from
The gas (including casing-head gas, reservoir gas, gas of mud volcano, coal bed gas and biology generate gas etc.) that right process is formed.And people are long-term
Since general " natural gas " definition, be from the narrow sense of energy point of view define, refer to the hydrocarbon naturally contained in stratum
The mixture of class and non-hydrocarbon gases.In petroleum geology, it is often referred to casing-head gas and reservoir gas.It is formed based on hydro carbons,
And contain non-hydrocarbon gas.Natural gas is contained in underground porous gap rock stratum, including casing-head gas, reservoir gas, coal bed gas, gas of mud volcano
Gas etc. is generated with biology, is also had on a small quantity for coal seam.It is high-grade fuel and industrial chemicals.Natural gas is mainly used for firing
Material, can manufacture carbon black, chemicals and liquefied petroleum gas, be the important original of modern industry by the propane of natural gas production, butane
Material.Natural gas is mainly made of gaseous state low molecular hydrocarbons and non-hydrocarbon gas mixing.
There are one be detected to its calorific value, but the natural gas inconvenience detection in pipeline in existing detection of natural gas,
It is directly detected with electronic component in pipeline, combustion of natural gas may be caused because electric current is excessive, and then danger can be caused, and every
It film or accuracy can then be influenced by heat carrier indirect detection, meanwhile, existing heating value of natural gas detection does not have generally
The inspection method for simultaneously combining both TDLAS and optoacoustic spectroscopy makes so that having unicity to heating value of natural gas detection
With with limitation.
Invention content
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of TDLAS is combined survey heating value of natural gas with optoacoustic spectroscopy
Apparatus and method are solved and are directly detected with electronic component in pipeline, may cause combustion of natural gas because electric current is excessive, meeting
The problem of causing danger, and then influencing accuracy across film or by heat carrier indirect detection.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs：A kind of TDLAS is combined with optoacoustic spectroscopy
The apparatus and method of heating value of natural gas are surveyed, including pipeline and detection case, the both sides of the detection case are communicated with the first promotion box,
The inside of the detection case is fixedly connected with partition board, is fixedly connected between the top of the partition board and the top for detecting box cavity
Elastic membrane, the top of the partition board and is fixedly connected with laser emitter positioned at the inside of elastic membrane, the top of the partition board and
Conduit and supporting rod, the top of the conduit and supporting rod have been respectively fixedly connected at left and right sides of laser emitter
Between be fixedly connected with fixed frame, the inside of the fixed frame is fixedly connected with laser pickoff.
The inside of the first promotion box is fixedly connected with the first electric telescopic rod, and described first pushes the internal slide of box
It is connected with clamping plate, the bottom of first electric telescopic rod one end at the top of fixed block and clamping plate by being fixedly connected, the folder
The side of plate runs through detection case and extends to the inside of detection case, solid between the bottom of the partition board and the bottom for detecting box cavity
Surely it is connected with piston cylinder, the bottom of the detection case is fixedly connected with the second promotion box, and described second pushes the bottom of box inner cavity
It is fixedly connected with the second electric telescopic rod, the top of second electric telescopic rod is fixedly connected with push rod, the top of the push rod
End is through detection case and extends to the inside of piston cylinder, and the top of the push rod is fixedly connected with piston, and the surface of piston with
The inner surface of piston cylinder is slidably connected.
Preferably, the left side of the detection chamber interior wall and circuit board is fixedly connected with below the partition board.
Preferably, the left wall of the detection case and between partition board and circuit board through there is USB jack.
Preferably, the bottom of the detection box cavity and accumulator, the inspection are fixedly connected on the right side of the piston cylinder
The right wall of measuring tank and the lower section for being located at partition board, which are run through, button switch.
Preferably, charging port is fixedly connected on the right side of the accumulator, and detection case is run through on the right side of charging port
And extend to the outside of detection case.
Preferably, the right wall of the detection case and positioned at the top of partition board through having pressure release box, the left side of the pressure release box
It is communicated with suction nozzle.
Preferably, the surface of the fixed frame is fixedly connected with connecting rod, and the one end of connecting rod far from fixed frame is fixedly connected
There is support ring.
Preferably, described first box and the top on detection case surface is pushed to fix company by the surface of link block and pipeline
It connects, and the top of detection case is connected to the surface of pipeline.
The invention also discloses a kind of TDLAS to be combined the method for surveying heating value of natural gas with optoacoustic spectroscopy, is specifically included as follows
Step：
Step 1: data line is inserted into USB jack, so that device is connected computer, press button switch, it is electronic first to start second
Telescopic rod, the second electric telescopic rod are done lifting by push rod band piston and are moved back and forth, and make air pressure change in elastic membrane, and then will
Natural gas in pipeline is pumped into, and is continued for some time and is preheated for elastic membrane internal element, makes component temperature close to natural gas.
Step 2: pressing button switch again, the second electric telescopic rod stops after shrinking, and natural gas is full of elastic membrane, so
After start the first electric telescopic rod, the first electric telescopic rod drives two clamping plates that elastic membrane clamping is made its sealing, then starts
Laser emitter, laser emitter send out laser, and laser pickoff receives laser.
Step 3: will be handled after data transfer to computer by USB jack, finally button press is opened again
It closes, makes element returns, periodically charged to accumulator by charging port, when laser emitter failure makes leakage of current, with bullet
When natural gas leads to burning in power film, burning is net rapidly and makes elastic force membrane swelling for a small amount of natural gas in elastic membrane, and pressure release box will
Air pressure venting in detection case.
(3) advantageous effect
The present invention provides a kind of TDLAS to be combined the apparatus and method for surveying heating value of natural gas with optoacoustic spectroscopy.Have following
Advantageous effect：
(1), the TDLAS is combined the apparatus and method for surveying heating value of natural gas with optoacoustic spectroscopy, by the inside of detection case
Be fixedly connected with partition board, be fixedly connected with elastic membrane between the top of partition board and the top for detecting box cavity, the top of partition board and
It is fixedly connected with laser emitter, the top of partition board and the left and right sides difference for being located at laser emitter positioned at the inside of elastic membrane
Be fixedly connected with conduit and supporting rod, be fixedly connected with fixed frame between conduit and the top of supporting rod, fixed frame it is interior
Portion is fixedly connected with laser pickoff, and the inside of the first promotion box is fixedly connected with the first electric telescopic rod, and first pushes box
Internal slide is connected with clamping plate, and the bottom of first electric telescopic rod one end is pressed from both sides by being fixedly connected at the top of fixed block and clamping plate
The side of plate runs through detection case and extends to the inside of detection case, and an independent small space can be separated by the way that elastic membrane is arranged,
Using the cooperation of the first electric telescopic rod and clamping plate, can by elastic membrane top closure, after being separated with the big pipeline of natural gas, even if because
Electric leakage causes to catch fire, and will not influence the natural gas in big pipeline, and utilizes the cooperation of laser emitter and laser pickoff, can
The convenient calorific value for accurately detecting natural gas, it is safe and precisely efficient.
(2), the TDLAS combined with optoacoustic spectroscopy survey heating value of natural gas apparatus and method, by the bottom of partition board with
It is fixedly connected with piston cylinder between the bottom of detection box cavity, the bottom of detection case is fixedly connected with the second promotion box, and second pushes away
The bottom of dynamic box inner cavity is fixedly connected with the second electric telescopic rod, and the top of the second electric telescopic rod is fixedly connected with push rod, pushes away
The top of bar runs through detection case and extends to the inside of piston cylinder, and the top of push rod is fixedly connected with piston, and the surface of piston
It is slidably connected with the inner surface of piston cylinder, using the cooperation of the second electric telescopic rod, push rod and piston, piston cylinder and bullet can be changed
Air pressure in power film, and then easily the natural gas in pipeline can be pumped into elastic membrane, convenient for measuring preceding preheating and sampling.
(3), the TDLAS is combined the apparatus and method for surveying heating value of natural gas with optoacoustic spectroscopy, passes through the right wall in detection case
And suction nozzle is communicated on the left of pressure release box through there is pressure release box positioned at the top of partition board, elastic membrane elasticity is larger, makes when surprisingly
In elastic membrane when combustion of natural gas, air pressure is excessive in detection case caused by elastic membrane expands rapidly, can be carried out by pressure release box
Pressure release, and pressure release box then plays dust-proof effect when normal use.
Description of the drawings
Fig. 1 is the sectional view of partial structurtes of the present invention；
Fig. 2 is the whole external structure schematic diagram of the present invention；
Fig. 3 is the partial enlarged view at A in Fig. 1 of the present invention；
Fig. 4 is the partial enlarged view at B in Fig. 1 of the present invention.
In figure, 1- pipelines, 2- detection cases, 3- first push box, 4- partition boards, 5- elastic membranes, 6- laser emitters, 7- conducting wires
Pipe, 8- supporting rods, 9- fixed frames, 10- laser pickoffs, the first electric telescopic rods of 11-, 12- clamping plates, 13- fixed blocks, 14- live
Plug tube, 15- second push box, the second electric telescopic rods of 16-, 17- push rods, 18- pistons, 19- circuit boards, 20-USB sockets, 21-
Accumulator, 22- button switches, 23- charging ports, 24- pressure releases box, 55- connecting rods, 26- support rings, 27- link blocks.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 4 are please referred to Fig.1, the embodiment of the present invention provides a kind of technical solution：A kind of TDLAS and optoacoustic spectroscopy combination observation
The apparatus and method of right gas calorific value, including pipeline 1 and detection case 2, the left side of 2 inner wall of detection case and the lower section for being located at partition board 4 are consolidated
Surely be connected with circuit board 19, the left wall of detection case 2 and between partition board 4 and circuit board 19 through having USB jack 20, detection case
The bottom of 2 inner cavities and it is fixedly connected with accumulator 21 positioned at the right side of piston cylinder 14, the right wall of detection case 2 and positioned at partition board 4
Lower section is through there is button switch 22, and the right side of accumulator 21 is fixedly connected with charging port 23, and the right side of charging port 23 is passed through
Wear detection case 2 and extend to the outside of detection case 2, the right wall of detection case 2 and positioned at the top of partition board 4 through there is pressure release box 24,
The left side of pressure release box 24 is communicated with suction nozzle, and 5 elasticity of elastic membrane is larger, when surprisingly making combustion of natural gas in elastic membrane 5, elastic force
Air pressure is excessive in detection case 2 caused by expansion rapidly for film 5, can carry out pressure release by pressure release box 24, and pressure release when normal use
Box 24 then plays dust-proof effect, and the both sides of detection case 2 are communicated with the first promotion box 3, and first pushes box 3 and 2 table of detection case
The top in face is fixedly connected by link block 27 with the surface of pipeline 1, and the top of detection case 2 is connected to the surface of pipeline 1,
The inside of detection case 2 is fixedly connected with partition board 4, is fixedly connected between the top and the top of 2 inner cavity of detection case of partition board 4 elastic
Film 5, elastic membrane 5 be fire prevention material, when internal combustion of natural gas, its own will not burn, but expand, and inner space compared with
Small, the natural gas of storage is less, will not occur seriously to explode, and the top of partition board 4 and is fixedly connected with positioned at the inside of elastic membrane 5
Laser emitter 6, the cooperation of laser emitter 6 and laser pickoff 10 can detect calorific value, partition board according to the principle of optoacoustic spectroscopy
4 top and conduit 7 and supporting rod 8, laser pickoff 10 have been respectively fixedly connected with it positioned at the left and right sides of laser emitter 6
Inside is the conducting wire of laser pickoff 10, and fixed frame 9, fixed frame are fixedly connected between conduit 7 and the top of supporting rod 8
9 surface is fixedly connected with connecting rod 25, and the one end of connecting rod 15 far from fixed frame 9 is fixedly connected with support ring 26, fixed frame 9
Inside is fixedly connected with laser pickoff 10.
The inside of first promotion box 3 is fixedly connected with the first electric telescopic rod 11, and first pushes the internal slide connection of box 3
There are clamping plate 12, the bottom of 11 one end of the first electric telescopic rod to be fixedly connected with the top of clamping plate 12 by fixed block 13, clamping plate 12
Side through detection case 2 and extend to the inside of detection case 2, can separate an independent small space by the way that elastic membrane 5 is arranged,
Using the cooperation of the first electric telescopic rod 11 and clamping plate 12, can by 5 top closure of elastic membrane, after being separated with the big pipeline of natural gas,
Even if because electric leakage causes to catch fire, the natural gas in big pipeline will not be influenced, and utilizes laser emitter 6 and laser pickoff 10
Cooperation, conveniently can accurately detect the calorific value of natural gas, safety and precisely efficiently, bottom and 2 inner cavity of detection case of partition board 4
Bottom between be fixedly connected with piston cylinder 14, the bottom of detection case 2 is fixedly connected with the second promotion box 15, and second pushes box 15
The bottom of inner cavity is fixedly connected with the second electric telescopic rod 16, and the top of the second electric telescopic rod 16 is fixedly connected with push rod 17,
The top of push rod 17 runs through detection case 2 and extends to the inside of piston cylinder 14, and the top of push rod 17 is fixedly connected with piston 18, and
The surface of piston 18 and the inner surface of piston cylinder 14 are slidably connected, and utilize the second electric telescopic rod 16, push rod 17 and piston 18
Cooperation can be changed piston cylinder 14 and the air pressure in elastic membrane 5, and then can the natural gas in pipeline 1 be easily pumped into elastic membrane 5
It is interior, convenient for measuring preceding preheating and sampling.
The invention also discloses a kind of TDLAS to be combined the method for surveying heating value of natural gas with optoacoustic spectroscopy, it is characterised in that：Tool
Body includes the following steps：
Step 1: data line is inserted into USB jack 20, so that device is connected computer, press button switch 22, first start second
Electric telescopic rod 16, the second electric telescopic rod 16 are done lifting with piston 18 by push rod 17 and are moved back and forth, and gas in elastic membrane 5 is made
Buckling, and then the natural gas in pipeline 1 is pumped into, it continues for some time and is preheated for 5 internal element of elastic membrane, make component temperature
Close to natural gas.
Step 2: pressing button switch 22 again, the second electric telescopic rod 16 stops after shrinking, and natural gas is full of elastic membrane
5, then start the first electric telescopic rod 11, the first electric telescopic rod 11 drives two clamping plates 12 to keep its close the clamping of elastic membrane 5
Then envelope starts laser emitter 6, laser emitter 6 sends out laser, and laser pickoff 10 receives laser.
Step 3: will be handled after data transfer to computer by USB jack 20, finally button press is opened again
22 are closed, element returns are made, is periodically charged to accumulator 21 by charging port 23, when 6 failure of laser emitter makes electric current let out
Dew, burning is net rapidly and elastic membrane 5 is made to expand with a small amount of natural gas in elastic membrane 5, and elastic membrane 5 expands rapidly, pressure release box 24
By air pressure venting in detection case 2.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of TDLAS is combined the device for surveying heating value of natural gas, including pipeline (1) and detection case (2), feature with optoacoustic spectroscopy
It is：The both sides of the detection case (2) are communicated with the first promotion box (3), the inside of the detection case (2) be fixedly connected with every
Plate (4) is fixedly connected with elastic membrane (5), the partition board between the top and the top of detection case (2) inner cavity of the partition board (4)
(4) it top and is fixedly connected with laser emitter (6) positioned at the inside of elastic membrane (5), the top of the partition board (4) and is located at
Conduit (7) and supporting rod (8), the conduit (7) and support have been respectively fixedly connected at left and right sides of laser emitter (6)
Fixed frame (9) is fixedly connected between the top of bar (8), the inside of the fixed frame (9) is fixedly connected with laser pickoff
(10)；
The inside of the first promotion box (3) is fixedly connected with the first electric telescopic rod (11), and described first pushes the interior of box (3)
Portion slidably connects clamping plate (12), and the bottom of described first electric telescopic rod (11) one end passes through fixed block (13) and clamping plate (12)
Top be fixedly connected, the side of the clamping plate (12) is through detection case (2) and extends to the inside of detection case (2), it is described every
It is fixedly connected with piston cylinder (14), the bottom of the detection case (2) between the bottom and the bottom of detection case (2) inner cavity of plate (4)
It is fixedly connected with the second promotion box (15), the bottom of second promotion box (15) inner cavity is fixedly connected with the second electric telescopic rod
(16), the top of second electric telescopic rod (16) is fixedly connected with push rod (17), and the top of the push rod (17) is through inspection
The top of measuring tank (2) and the inside for extending to piston cylinder (14), the push rod (17) is fixedly connected with piston (18), and piston
(18) inner surface on surface and piston cylinder (14) is slidably connected.
2. a kind of TDLAS according to claim 1 is combined the device for surveying heating value of natural gas, feature to exist with optoacoustic spectroscopy
In：The left side of detection case (2) inner wall and circuit board (19) is fixedly connected with below the partition board (4).
3. a kind of TDLAS according to claim 2 is combined the device for surveying heating value of natural gas, feature to exist with optoacoustic spectroscopy
In：The left wall of the detection case (2) and between partition board (4) and circuit board (19) through there is USB jack (20).
4. a kind of TDLAS according to claim 1 is combined the device for surveying heating value of natural gas, feature to exist with optoacoustic spectroscopy
In：The bottom of detection case (2) inner cavity and accumulator (21), the detection are fixedly connected on the right side of the piston cylinder (14)
The right wall of case (2) and the lower section for being located at partition board (4), which are run through, button switch (22).
5. a kind of TDLAS according to claim 4 is combined the device for surveying heating value of natural gas, feature to exist with optoacoustic spectroscopy
In：Charging port (23) is fixedly connected on the right side of the accumulator (21), and detection case is run through on the right side of charging port (23)
(2) and the outsides of detection case (2) is extended to.
6. a kind of TDLAS according to claim 1 is combined the device for surveying heating value of natural gas, feature to exist with optoacoustic spectroscopy
In：The right wall of the detection case (2) and the top for being located at partition board (4), which are run through, pressure release box (24), a left side for the pressure release box (24)
Side is communicated with suction nozzle.
7. a kind of TDLAS according to claim 1 is combined the device for surveying heating value of natural gas, feature to exist with optoacoustic spectroscopy
In：The surface of the fixed frame (9) is fixedly connected with connecting rod (25), and the one end of connecting rod (15) far from fixed frame (9) is fixed and connected
It is connected to support ring (26).
8. a kind of TDLAS according to claim 1 is combined the device for surveying heating value of natural gas, feature to exist with optoacoustic spectroscopy
In：The first promotion box (3) and the top on detection case (2) surface are fixed by link block (27) and the surface of pipeline (1)
Connection, and the top of detection case (2) is connected to the surface of pipeline (1).
9. a kind of TDLAS is combined the method for surveying heating value of natural gas with optoacoustic spectroscopy, it is characterised in that：Specifically comprise the following steps：
Step 1: data line is inserted into USB jack (20), so that device is connected computer, press button switch (22), first start second
Electric telescopic rod (16), the second electric telescopic rod (16) are done lifting by push rod (17) band piston (18) and are moved back and forth, and bullet is made
Power film (5) interior air pressure change, and then the natural gas in pipeline (1) is pumped into, it continues for some time as elastic membrane (5) internal element
Preheating, makes component temperature close to natural gas.
Step 2: pressing button switch (22) again, the second electric telescopic rod (16) stops after shrinking, and natural gas is full of elastic membrane
(5), then start the first electric telescopic rod (11), the first electric telescopic rod (11) drives two clamping plates (12) by elastic membrane (5)
Clamping makes its sealing, then starts laser emitter (6), and laser emitter (6) sends out laser, and laser pickoff (10), which receives, to swash
Light.
Step 3: will be handled after data transfer to computer by USB jack (20), finally button press switchs again
(22), make element returns, periodically charged to accumulator (21) by charging port (23), when laser emitter (6) failure makes
Burning is net rapidly and elastic membrane (5) is made to expand for a small amount of natural gas in leakage of current, with elastic membrane (5), and elastic membrane (5) is rapid swollen
Swollen, pressure release box (24) is by the interior air pressure venting of detection case (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810601023.6A CN108717051B (en) | 2018-06-12 | 2018-06-12 | Device and method for measuring natural gas calorific value by combining TDLAS (tunable diode laser absorption spectroscopy) and photoacoustic spectroscopy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810601023.6A CN108717051B (en) | 2018-06-12 | 2018-06-12 | Device and method for measuring natural gas calorific value by combining TDLAS (tunable diode laser absorption spectroscopy) and photoacoustic spectroscopy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108717051A true CN108717051A (en) | 2018-10-30 |
| CN108717051B CN108717051B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810601023.6A Active CN108717051B (en) | 2018-06-12 | 2018-06-12 | Device and method for measuring natural gas calorific value by combining TDLAS (tunable diode laser absorption spectroscopy) and photoacoustic spectroscopy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208315A (en) * | 2019-07-01 | 2019-09-06 | 深圳市瑞邦创建电子有限公司 | A kind of wiring board detection system |
| CN114229462A (en) * | 2021-12-17 | 2022-03-25 | 张毅 | Sheet metal component piles up strorage device |
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