CN108827463B - Immersion type full-absorption high-energy laser power energy meter - Google Patents
Immersion type full-absorption high-energy laser power energy meter Download PDFInfo
- Publication number
- CN108827463B CN108827463B CN201810626498.0A CN201810626498A CN108827463B CN 108827463 B CN108827463 B CN 108827463B CN 201810626498 A CN201810626498 A CN 201810626498A CN 108827463 B CN108827463 B CN 108827463B
- Authority
- CN
- China
- Prior art keywords
- absorption
- cavity
- water flow
- plate
- energy
- 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
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 274
- 238000007654 immersion Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 162
- 239000007787 solid Substances 0.000 claims abstract description 128
- 230000003287 optical effect Effects 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 23
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 6
- 239000002356 single layer Substances 0.000 claims description 60
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 238000004381 surface treatment Methods 0.000 claims description 8
- 229910000737 Duralumin Inorganic materials 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 10
- 239000006096 absorbing agent Substances 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 27
- 239000010410 layer Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 4
- 239000011343 solid material Substances 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4257—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Lasers (AREA)
Abstract
The invention discloses an immersion type full-absorption high-energy laser power energy meter which comprises an absorption cavity, a temperature field homogenizer, a water flow temperature measuring sensor, a shell, a flow meter, a signal processing system, an electric signal lead, a water flow input and output pipeline, an absorption cavity fixing support, a data acquisition circuit module, a flow field rectifier, a window optical mirror, a solid absorption flat plate and a sieve hole type solid absorption plate. The absorption cavity of the invention adopts the immersion type structural design, uses the water fluid and the solid absorption plate immersed in the water fluid as the laser absorption medium, effectively combines the advantages of the water flow absorption type energy meter and the solid cavity type energy meter, breaks through the limitation of the strong laser damage resistance threshold of the absorber material, also mainly solves the problem of universality of the high-energy laser power energy meter to laser sources with different central wavelengths, and obviously improves the testing capability and the measuring accuracy of high-power high-energy laser by means of the design of a temperature field homogenizer, an accurate temperature measurement technology, specific heat nonlinear compensation and the like.
Description
Technical Field
The invention belongs to the field of high-energy laser power energy measurement, and particularly relates to an immersion type full-absorption high-energy laser power energy meter which is suitable for high-energy laser power energy full-absorption measurement.
Background
The power energy is one of the most key technical indexes of the high-energy laser, and the measurement of the power energy of the high-energy laser can provide the most important reference basis for the aspects of index verification, system performance evaluation and the like in the laser development process. With the rapid development of high-energy laser technology and the wide application of high-energy lasers in the fields of national defense, civil use and industrial production, lasers have higher and higher power and energy, and higher requirements are put forward on the power energy measurement capability of high-energy laser power energy meters. Particularly, for a high-energy laser thermal type full-absorption absolute energy measurement mode, an absorber of the power energy meter must be tested by laser irradiation with ultrahigh power density for a long time. In recent years, some domestic research institutions develop researches on high-power high-energy total-absorption power energy measurement technologies, and both a document named as 'water-circulation type laser energy meter temperature response modeling' (infrared and laser engineering, 2012, 41 (6): 1494-; the document named as "water fluid absorption type total absorption high-energy Laser energy meter" (Applied Physics B: Laser and Optics, (2013) 110: 573-578) develops a high-energy Laser total absorption power energy measurement method which directly uses water flow as an absorption medium to realize the measurement of high-energy Laser power energy of a specific wavelength. The two technologies have respective advantages and disadvantages, the water cooling type high-energy laser energy meter has the advantages that the measurable laser wavelength range is wide, the incident laser wavelength is basically not limited, the heat exchange efficiency is improved to a certain extent compared with the traditional solid absorption type energy meter, the measurable upper limit threshold of the power energy is also improved, but the water cooling type high-energy laser energy meter still uses a solid material as an absorber essentially, and only cools the solid material through water flow, so the high-energy laser energy meter is limited by the physical characteristics of the solid material and the heat exchange and heat transfer mechanism between the solid material and the water flow, has limited strong laser damage resistance and is mostly used for measuring the high-energy laser power energy in the medium range; the method for measuring the total absorption power energy of the water flow absorption type high-energy laser has the advantages that the method for measuring the total absorption power energy of the water flow absorption type high-energy laser adopts a water flow to carry out body absorption, the laser damage resistance of the energy meter is obviously improved, the heat exchange efficiency is improved by a forced heat exchange mode, so the upper limit threshold of the measurable power energy is very high, but the method is limited by the physical characteristics of water, the difference of the absorption rate of the laser with different wavelengths is large, and the method is related to the thickness design of the water flow layer of an absorption cavity of the power energy meter and the heat exchange efficiency, so the existing water flow absorption type power energy meter can only measure the high-energy laser energy with specific wavelength generally, the universality requirement of the measurement of the high-energy laser power energy with different wavelength ranges can not be met, meanwhile, the method is limited by the flow field, thereby affecting the power energy measurement accuracy of the water flow absorption type power energy meter.
Disclosure of Invention
In order to realize the power energy measurement of high-energy laser, solve the problem of strong laser damage resistance of an energy meter, break through the limitation of the energy meter on the selection of the laser wavelength to be measured and improve the accuracy of energy measurement, the invention provides an immersion type full-absorption high-energy laser power energy meter.
The technical scheme of the invention is as follows:
the invention discloses an immersion type full-absorption high-energy laser power energy meter which is characterized by comprising an absorption cavity, a temperature field homogenizer, a water flow temperature measuring thermoelectric sensor, a water pipe, an electric signal lead, a flow meter, a signal acquisition circuit, a water flow output pipe, a water flow input pipe, a flow field rectifier, an absorption cavity fixing support, a single-layer solid absorption flat plate, a window optical mirror and a homogenizing sheet which are arranged in a shell. The absorption cavity is an aluminum cylindrical cavity, a window optical lens is arranged on a laser incidence window on the outer side of the cavity wall of the absorption cavity, a cake-shaped single-layer solid absorption flat plate is arranged on one side in the absorption cavity, and the single-layer solid absorption flat plate and the window optical lens are arranged in parallel. The absorption cavity is arranged on an absorption cavity fixing support of the base in the shell, one end of the absorption cavity is connected with one end of the flow field rectifier through threads, and the other end of the absorption cavity is connected with one end of the temperature field homogenizer through a water pipe pipeline. The other end of the temperature field homogenizer is connected with the inlet of the flowmeter through a water pipe, the outlet of the flowmeter is connected with one end of a water pipe output pipeline, and the other end of the water flow output pipeline extends out of the shell. The other end of the flow field rectifier is connected with one end of a water flow input pipeline, and the other end of the water flow input pipeline extends out of the shell. The water flow temperature measuring device is characterized in that two paths of water flow temperature measuring thermoelectric sensors are respectively arranged on the water flow input pipeline and the water flow output pipeline, the signal output of each path of water flow temperature measuring thermoelectric sensor and the signal output of the flowmeter are respectively connected with a signal acquisition circuit through electric signal leads, and the signal acquisition circuit is electrically connected with an external data processing system through a network interface. The water flow flows into the absorption cavity through the water flow input pipeline and the flow field rectifier in sequence, flows out of the energy meter through the water pipe at the top end of the absorption cavity and flows out of the energy meter through the temperature field homogenizer, the flow meter and the water flow output pipeline in sequence. The single layer solid absorption plate is completely immersed in the water fluid in the absorption cavity.
The absorption cavity is internally provided with a structure formed by combining a single-layer solid absorption flat plate and a screen hole type solid absorption plate, the single-layer solid absorption flat plate is arranged on one side in the absorption cavity and is arranged in parallel with a window optical mirror of the absorption cavity, the screen hole type solid absorption plate is arranged between the single-layer solid absorption flat plate and the window optical mirror in parallel, the screen hole type solid absorption plate and the window optical mirror are separated by a distance, and the separation distance of the screen hole type solid absorption plate and the window optical mirror is adjusted according to the wavelength of the laser to be detected. The single-layer solid absorption flat plate and the sieve hole type solid absorption plate are completely immersed in the water fluid of the absorption cavity.
The sieve-hole type solid absorption plate is of a round cake-shaped structure, and dozens of round through holes are formed in the center of the sieve-hole type solid absorption plate and used for enabling about 50% of laser to be detected in a light spot area to penetrate through the sieve-hole type solid absorption plate through the round through holes and to be incident on a single-layer solid absorption flat plate.
The temperature field homogenizer is an aluminum barrel-shaped structure, a plurality of groups of grooves are uniformly arranged on the inner wall of the temperature field homogenizer, and the number of the grooves is four. The temperature field homogenizer is internally provided with a plurality of homogenizing plates. The homogenizing plate is a round cake-shaped structure formed by strip-shaped hollow parallel strips, four convex blocks are uniformly arranged on the excircle of the homogenizing plate, and each homogenizing plate is embedded in four corresponding grooves on the inner wall of the temperature field homogenizer through the convex blocks. The strip-shaped hollow parallel strips of two adjacent homogenizing plates are arranged at an angle of 90 degrees.
The flow field rectifier is of a rectangular sheet structure, strip-shaped hollow parallel strips are arranged on two sides of the flow field rectifier respectively, and a plurality of circular through holes are formed in the middle of the flow field rectifier.
The water flow temperature measurement thermoelectric sensor is of a hexagon screw structure, a thermocouple wire and a lead are installed in the armor sleeve, the armor sleeve penetrates out from the center of the hexagon screw, and the temperature measurement end is of an exposed end structure and is arranged at the front end of the armor sleeve.
The single-layer solid absorption flat plate is made of red copper or duralumin, and the surface treatment of the single-layer solid absorption flat plate is made of oxidation blackening or spraying of black ceramic materials.
The sieve pore type solid absorbing plate material adopts red copper or duralumin, and the surface treatment of the sieve pore type solid absorbing plate adopts oxidation blackening or spraying black ceramic material.
The flow field rectifier is made of hard aluminum or stainless steel.
Aiming at the high-power high-energy strong laser test, the invention mainly solves the problem that the water flow absorption type energy meter cannot adapt to lasers with wide spectrum bands or different central wavelengths on the premise of ensuring that the high-energy power energy meter is not damaged by the lasers.
The invention adopts water fluid as main absorption medium of laser and cooling medium of solid absorption plate, and utilizes the structure design of absorption cavity and flow field rectifier at water inlet to raise heat exchange efficiency in absorption cavity, the absorption cavity can reach heat balance in 2 seconds, so that after high-energy laser is incident into the absorption cavity, its energy can be quickly taken away by water flow, and the power balance type measuring mode can be used for replacing traditional energy accumulation type measuring mode to implement long-time power energy measurement of continuous high-energy laser so as to effectively solve the problem of strong laser damage resistance of high-energy laser power energy meter.
Secondly, the universal problem of the water flow absorption type energy meter for the laser with different wavelengths is mainly solved, and the main influence factors of the water flow absorption type energy meter comprise two aspects: the water flow absorption medium has the problem of obvious difference in absorption efficiency of different wavelengths of laser, and the absorption cavity window optical mirror has difference in laser transmittance of different wavelengths; to this end, the present invention takes two solutions: firstly, a solid absorption plate is arranged in the absorption cavity, the solid absorption plate is completely immersed in the water fluid, and the water fluid and the solid absorption plate are jointly used as an absorption medium of the laser. The solid absorption plate comprises a single-layer solid absorption flat plate and a screen hole type solid absorption plate, and the outer surfaces of the solid absorption plate are treated by surface blackening or black material spraying, so that the solid absorption plate has good absorption efficiency for lasers with different wavelength spectrums; the water fluid not only can absorb the laser energy, but also can be used as a cooling medium of the solid absorption plate to quickly replace and bring the laser energy absorbed by the solid absorption plate out of the absorption cavity; the laser energy absorption mode combining the energy meter and the laser can effectively solve the difference of the absorption efficiency of the energy meter on the laser with different wavelengths. For the measured high-energy laser with longer wavelength, the laser energy can be completely absorbed only by the thickness of a thinner water flow layer; for the laser to be detected with short wavelength and large power, a water flow layer absorbs a part of laser energy, the immersed single-layer solid absorption plate can absorb the rest most of the energy, and a part of the laser energy is reflected by the solid absorption plate and then is absorbed by the water flow layer for the second time; for the measured laser with higher power energy, a double-plate structure combining a sieve-hole type solid absorption plate and a single-layer solid absorption flat plate can be used, the residual laser after the first absorption of the water flow layer can generate multiple reflection and diffuse scattering between the sieve-hole type solid absorption plate and the single-layer solid absorption plate, the double plates and the water layer between the double plates absorb energy together, and the residual laser energy reflected back along the light path in small quantity can be absorbed by the water flow layer for the second time, so that the full absorption energy measurement of the high-energy laser is realized; and secondly, the raw material selection and the installation structure design of the absorption cavity window optical lens are considered. For high-energy laser from visible light to near infrared spectrum, quartz can be used as a window optical lens material, and the window optical lens has the characteristics of high transmittance and low absorptivity, and has a flat transmittance curve in the visible light to near infrared spectrum, thereby basically covering the wavelength range of the current high-energy laser. Meanwhile, the window optical lens and the lens frame are integrally designed, are connected with the wall of the absorption cavity through threads, and are convenient and quick to install and disassemble, so that the high-energy laser power energy measurement of middle infrared and far infrared wavelength bands can be met by replacing the window optical lens.
Finally, for the problem of how to improve the accuracy of energy measurement, the invention mainly adopts three measures according to the measurement principle of the energy meter: firstly, a temperature homogenizer is added in front of a temperature measuring point at a water outlet of an absorption cavity, the structure of the homogenizer adopts a barreled structure, a plurality of homogenizing plates are arranged in the homogenizer, and strip-shaped hollow parallel strips of two adjacent homogenizing plates are arranged in an angle of 90 degrees, so that the temperature of water fluid can be homogenized rapidly, and the influence of the temperature gradient of the water body on the temperature measuring accuracy is eliminated; secondly, a fast-response and high-precision water flow temperature measurement thermoelectric sensor is adopted to measure the temperature in real time, and a high-precision and fast-response flowmeter or mass meter is utilized to measure the quality of the water flow; thirdly, measuring real-time water temperature through CJC by utilizing a temperature nonlinear compensation technology, and correcting specific heat parameters of water flowing through the absorption cavity in real time according to a change curve of the specific heat of the water along with the temperature, so that the measurement accuracy is ensured.
The immersed full-absorption high-energy laser power energy meter has the advantages that the immersed structural design is adopted, water fluid and a solid absorption plate immersed in water flow are jointly used as laser absorption media, full absorption measurement of high-energy laser power energy is achieved, the advantages of the water flow absorption type energy meter and the advantages of the solid cavity type energy meter are effectively combined, limitation of strong laser damage resistance threshold of an absorber material is broken through, the problem of universality of the same high-energy laser power energy meter on laser sources with different central wavelengths is solved, and the measurement capability and the measurement accuracy of high-power high-energy laser are remarkably improved by means of temperature field homogenizer design, accurate temperature measurement technology, specific heat nonlinear compensation and the like.
Drawings
FIG. 1 is a schematic diagram of an immersion type total absorption high-energy laser power energy meter according to the present invention;
FIG. 2a is a schematic view of the structure of an absorption chamber provided with a single-layer solid absorption plate according to the present invention;
FIG. 2b is a schematic view of the structure of an absorption chamber of the present invention, which is provided with a sieve-type solid absorption plate and a single-layer solid absorption plate;
FIG. 3a is a schematic view of a single-layer solid absorber plate according to the present invention;
FIG. 3b is a schematic structural view of a sieve type solid absorption plate according to the present invention;
FIG. 4a is a schematic diagram of a temperature field homogenizer according to the present invention;
FIG. 4b is a schematic view of the structure of the homogenizing plate of the temperature field homogenizer in the present invention;
FIG. 5 is a schematic view of a flow field rectifier according to the present invention;
FIG. 6 is a schematic view of a water flow temperature measuring pyroelectric sensor according to the present invention;
in the figure, 1, an absorption cavity 2, a temperature field homogenizer 3, a water flow temperature measuring thermoelectric sensor 4, a water pipe 5, an electric signal lead 6, a flowmeter 7, a signal acquisition circuit 8, a data processing system 9, a water flow output pipe 10, a water flow input pipe 11, a flow field rectifier 12, an absorption cavity fixing support 13, a shell 14, a single-layer solid absorption flat plate 15, a window optical mirror 16, a sieve-hole type solid absorption plate 17 and a homogenizing sheet
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
Fig. 1 is a schematic structural view of an immersion type total absorption high-energy laser power energy meter of the present invention, fig. 2a is a schematic structural view of an absorption cavity provided with a single-layer solid absorption plate of the present invention, fig. 3a is a schematic structural view of a single-layer solid absorption plate of the present invention, fig. 4a is a schematic structural view of a temperature field homogenizer of the present invention, fig. 4b is a schematic structural view of a homogenizing plate of a temperature field homogenizer of the present invention, fig. 5 is a schematic structural view of a flow field rectifier of the present invention, and fig. 6 is a schematic structural view of a water flow temperature measuring pyroelectric sensor. In fig. 1 to 6, an immersion type total absorption high-energy laser power energy meter according to the present invention is characterized in that: the high-energy laser power energy meter comprises an absorption cavity 1, a temperature field homogenizer 2, a water flow temperature measuring thermoelectric sensor 3, a water pipe 4, an electric signal lead 5, a flowmeter 6, a signal acquisition circuit 7, a water flow output pipe 9, a water flow input pipe 10, a flow field rectifier 11, an absorption cavity fixing support 12, a single-layer solid absorption flat plate 14, a window optical mirror 15 and a homogenizing sheet 17, wherein the absorption cavity 1, the temperature field homogenizer 2, the water flow temperature measuring thermoelectric sensor 3, the water pipe, the electric signal lead 5, the flowmeter 6, the. The absorption cavity 1 is an aluminum cylindrical cavity, a window optical lens 15 is fixedly arranged on a laser incidence window on the outer side of the cavity wall of the absorption cavity 1, a cake-shaped single-layer solid absorption flat plate 14 is fixedly arranged on one side in the cavity of the absorption cavity 1, and the single-layer solid absorption flat plate 14 is parallel to the window optical lens 15. The absorption cavity 1 is arranged on an absorption cavity fixing support 12 of a base in the shell 13, one end of the absorption cavity 1 is connected with one end of the flow field rectifier 11 through threads, and the other end of the absorption cavity 1 is connected with one end of the temperature field homogenizer 2 through a water pipe 4. The other end of the temperature field homogenizer 2 is connected with the inlet of a flow meter 6 through a water pipe 4, the outlet of the flow meter 6 is connected with one end of a water pipe output pipe 9, and the other end of the water pipe output pipe 9 extends out of the shell 13. The other end of the flow field rectifier 11 is connected with one end of a water flow input pipeline 10, and the other end of the water flow input pipeline 10 extends out of the shell 13. The water flow input pipeline 10 and the water flow output pipeline 9 are respectively provided with two paths of water flow temperature measurement thermoelectric sensors 3, the signal output of each path of water flow temperature measurement thermoelectric sensor 3 and the signal output of the flowmeter 6 are respectively connected with the signal acquisition circuit 7 through the electric signal lead 5, and the signal acquisition circuit 7 is electrically connected with the external data processing system 8 through a network interface. The water flow flows into the absorption cavity 1 through the water flow input pipeline 10 and the flow field rectifier 11 in sequence, then flows out of the water pipe 4 at the top end of the absorption cavity 1, and flows out of the energy meter through the temperature field homogenizer 2, the flow meter 6 and the water flow output pipeline 9 in sequence. The single layer of solid absorption plate 14 is completely immersed in the aqueous fluid of the absorption chamber 1.
The temperature field homogenizer 2 is an aluminum barrel-shaped structure, a plurality of groups of grooves are uniformly arranged on the inner wall of the temperature field homogenizer 2, and the number of the grooves is four. The temperature field homogenizer 2 is internally provided with a plurality of homogenizing plates 17. The homogenizing plate 17 is a round cake-shaped structure formed by strip-shaped hollow parallel strips, four bumps are uniformly arranged on the outer circle of the homogenizing plate 17, and each homogenizing plate 17 is embedded in four corresponding grooves on the inner wall of the temperature field homogenizer 2 through the bumps. The strip-shaped hollow parallel strips of two adjacent homogenizing plates 17 are arranged at 90 degrees.
The flow field rectifier 11 is of a rectangular sheet structure, strip-shaped hollow parallel strips are respectively arranged on two sides of the flow field rectifier 11, and a plurality of circular through holes are formed in the middle of the flow field rectifier.
The water flow temperature measurement thermoelectric sensor 3 is of a hexagon screw structure, a thermocouple wire and a lead wire are arranged in an armor sleeve, the armor sleeve penetrates out from the center of the hexagon screw, and a temperature measurement end is of an exposed end structure and is arranged at the front end of the armor sleeve.
In fig. 1, the measured high-energy laser is incident into an absorption cavity 1 of an immersion type full-absorption high-energy laser power energy meter through a window optical mirror 15, the high-energy laser energy is converted into heat energy and is rapidly taken out of the absorption cavity 1 by taking water flow as a carrier, two paths of water flow temperature measurement thermoelectric sensors 3 are respectively arranged inside a water pipe 4 at the water flow input end and the water flow output end of the absorption cavity 1, the temperature difference of the water flow flowing through the absorption cavity before and after the water flow is accurately measured by the thermoelectric sensors, the water flow quality flowing through the absorption cavity in unit time is accurately measured by the flow meter, the signal output of the water flow temperature measurement thermoelectric sensors 3 and the signal output of the flow meter 6 are input into a signal acquisition circuit 7 through an electric signal lead for measurement signal acquisition, the signal acquisition circuit 7 is electrically connected with an external data processing system 8 through a network interface, and, and calculating the power and energy value of the measured high-energy laser by combining parameters such as specific heat of the water flow. In the measuring process, the absorption cavity 1 can reach thermal balance within 2s, namely, the high-energy laser energy incident into the absorption cavity 1 can be taken away by water flow, a power balance type measuring mode is formed, long-time power energy measurement of continuous high-energy laser is realized, and therefore the problem that the traditional energy accumulation type high-energy laser power energy meter is easy to be damaged by strong laser in long-time measurement is effectively solved.
In fig. 2a, the water flow in the absorption chamber 1 fills the whole chamber; a single-layer solid absorption flat plate 14 is arranged on the inner side of the absorption cavity 1, the single-layer solid absorption flat plate 14 is arranged in parallel with the window optical mirror 15, and the single-layer solid absorption flat plate 14 is completely immersed in the water fluid of the absorption cavity 1. For the measured high-energy laser with short wavelength and large power, most incident high-energy laser energy is absorbed by the water flow layer, the immersed single-layer solid absorption plate 14 can absorb the rest laser energy, and a small part of the high-energy laser energy is reflected by the solid absorption plate and then is absorbed by the water flow layer for the second time. The water fluid and the single-layer solid absorption plate immersed in the water flow are jointly used as an absorption medium of laser, so that full absorption measurement of high-energy laser power energy is realized, the advantages of a water flow absorption type energy meter and a solid cavity type energy meter are effectively combined, the water fluid not only can absorb the laser energy, but also can be used as a cooling medium of the single-layer solid absorption plate, the laser energy absorbed by the single-layer solid absorption plate is quickly replaced and taken out of the absorption cavity 1, and the problem of universality of the same high-energy laser power energy meter on different central wavelength laser sources is solved while the limitation of the strong laser damage resistance threshold of an absorber material is broken through.
In fig. 3a, the single-layer solid absorption plate 14 is a round cake-shaped structure, the material is red copper, and the surface treatment of the single-layer solid absorption plate is oxidation blackening, so that the single-layer solid absorption plate has good absorption efficiency for laser in different wavelength bands.
In fig. 4a, the temperature field homogenizer 2 is an aluminum barrel structure, a plurality of homogenizing plates 17 are arranged inside the temperature field homogenizer 2, the homogenizing plates 17 are strip-shaped hollow parallel strips to form a fixed round cake-shaped structure, the homogenizing plates 17 are fixedly installed inside the temperature field homogenizer 2, and the strip-shaped hollow parallel strips of two adjacent homogenizing plates 17 are arranged at 90 degrees. After the high-energy laser is incident into the absorption cavity 1, the energy of the high-energy laser is rapidly absorbed by the water fluid and the solid absorption plate in a short time and is stored in the water fluid to flow out of the absorption cavity 1, the action of the laser on water is very violent, so that the water flowing out of the absorption cavity has a large temperature gradient, and a temperature homogenizer 2 is required to be arranged before a temperature measuring point of a water outlet of the absorption cavity 1, so that the temperature field of the water fluid can be rapidly homogenized, the influence of the temperature gradient of the water on the temperature measuring accuracy of the sensor is eliminated, and the measuring accuracy of the immersion type full-absorption high-energy laser power.
In fig. 5, the flow field rectifier 11 is a rectangular sheet structure, the material is duralumin, two sides of the flow field rectifier 11 are processed into strip-shaped hollow parts, and a plurality of circular through holes are processed in the middle part, so that the flow velocity of water flow at two sides is greater than that of water flow at the middle part. The flow field rectifier 11 is disposed at a water flow inlet of the absorption cavity 1, and is mainly used for rectifying a flow field in the absorption cavity 1, increasing a water flow speed of an inner wall of the window optic mirror 15, and increasing a cooling speed of a solid absorption plate in the cavity, so that a heat exchange efficiency of the absorption cavity 1 is improved, and energy of high-energy laser is rapidly taken away by water flow after the high-energy laser is incident into the absorption cavity.
In fig. 6, the water flow temperature measurement thermoelectric sensor 3 is of a hexagon screw mounting structure, the thermocouple wire and the lead wire are mounted in the armor sleeve, the armor sleeve penetrates through the central region of the hexagon screw, and the temperature measurement end is arranged at the forefront end of the armor sleeve in an exposed end type structure. The water flow temperature measurement thermoelectric sensor 3 is installed on the water pipe 4 through threads, and the armor sleeve and the temperature measurement end are completely immersed in water flow inside the water pipe 4, so that the exposed temperature measurement end can quickly respond and accurately measure the real-time temperature change of a water body, and the measurement accuracy of the system is improved.
Example 2
This embodiment is the same as the embodiment 1, and is different from the structure shown in fig. 1 to 6 in that a single-layer solid absorption flat plate 14 and a sieve-type solid absorption plate 16 are combined in the absorption cavity 1, as shown in fig. 2b, the single-layer solid absorption flat plate 14 is disposed on one side in the absorption cavity 1 and is disposed parallel to a window optical mirror 15 of the absorption cavity 1, the sieve-type solid absorption plate 16 is disposed parallel between the single-layer solid absorption flat plate 14 and the window optical mirror 15, the sieve-type solid absorption plate 16 and the window optical mirror 15 are separated by a distance, and the separation distance therebetween is adjusted according to the wavelength of the laser to be measured. The single-layer solid absorption flat plate 14 and the sieve-hole type solid absorption plate 16 are completely immersed in the water fluid of the absorption cavity 1.
The sieve-mesh solid absorption plate 16 is a round cake-shaped structure, and tens of round through holes are formed in the center of the sieve-mesh solid absorption plate 16, so that about 50% of laser to be detected in a light spot region penetrates through the sieve-mesh solid absorption plate 16 through the round through holes and is incident on the single-layer solid absorption flat plate 14.
For the measured laser with higher power energy, a double-plate structure combining the sieve-hole type solid absorption plate 16 and the single-layer solid absorption flat plate 14 is used, the high-energy laser can be absorbed by the water flow layer and the sieve-hole type solid absorption plate 16 firstly, the rest laser can be subjected to multiple reflection and diffuse scattering between the sieve-hole type solid absorption plate 16 and the single-layer solid absorption plate 14, the double plates formed by the sieve-hole type solid absorption plate 16 and the single-layer solid absorption flat plate 14 and a water layer between the double plates can absorb energy together, and a small amount of laser energy reflected back along the light path can be subjected to secondary absorption by the water flow layer, so that the measurement of the total absorption energy of the high-energy laser is realized. The water fluid, the sieve-hole type solid absorption plate 16 immersed in the water flow and the single-layer solid absorption flat plate 14 are jointly used as absorption media of laser, full absorption measurement of high-energy laser power energy is achieved, the advantages of the water flow absorption type energy meter and the solid cavity type energy meter are effectively combined, the water fluid can absorb the laser energy and can also be used as cooling media of the single-layer solid absorption plate 14 and the sieve-hole type solid absorption plate 16, the laser energy absorbed by the single-layer solid absorption plate 14 and the sieve-hole type solid absorption plate 16 can be rapidly replaced and taken out of the absorption cavity 1, the limitation of the strong laser damage resistance threshold of an absorber material is broken through, and the problem that the same high-energy laser power energy meter is universal to laser sources with different central wavelengths is also solved.
In the present embodiment, the sieve-type solid absorption plate 16 is a round cake-shaped structure, and as shown in fig. 3b, tens of round through holes are arranged in the middle area of the round cake, so that about 50% of the laser to be measured in the light spot area penetrates through the sieve-type solid absorption plate 16 through the round through holes and is incident on the single-layer solid absorption flat plate 14; in this embodiment, the flow meter 6 in embodiment 1 is replaced with a mass meter; the screen hole type solid absorption plate 16 is made of red copper, and oxidation blackening is adopted in surface treatment, so that the screen hole type solid absorption plate has good absorption efficiency for lasers in different wavelength bands.
In the embodiment, the single-layer solid absorption flat plate 14 is made of duralumin, and the surface treatment of the single-layer solid absorption flat plate 14 is made of a sprayed black ceramic material; the flow field rectifier 11 is made of stainless steel.
Example 3
The structure of this embodiment is the same as that of embodiment 2, except that the material of the screen hole type solid absorption plate 16 is duralumin, and the surface treatment of the screen hole type solid absorption plate 16 is a black ceramic material.
Claims (9)
1. An immersion type full-absorption high-energy laser power energy meter is characterized in that: the high-energy laser power energy meter comprises an absorption cavity (1), a temperature field homogenizer (2), a water flow temperature measurement thermoelectric sensor (3), a water pipe (4), an electric signal lead (5), a flow meter (6), a signal acquisition circuit (7), a water flow output pipe (9), a water flow input pipe (10), a flow field rectifier (11), an absorption cavity fixing support (12), a single-layer solid absorption flat plate (14), a window optical mirror (15) and a homogenizing plate (17), wherein the absorption cavity (1), the temperature field homogenizer (2), the water flow temperature measurement thermoelectric sensor, the water pipe (4), the electric signal lead (5), the; the absorption cavity (1) is an aluminum cylindrical cavity, a window optical lens (15) is arranged at a laser incidence window at the outer side of the cavity wall of the absorption cavity (1), a round cake-shaped single-layer solid absorption flat plate (14) is arranged at one side in the cavity of the absorption cavity (1), and the single-layer solid absorption flat plate (14) is arranged in parallel with the window optical lens (15); the absorption cavity (1) is arranged on an absorption cavity fixing support (12) of a base in the shell (13), one end of the absorption cavity (1) is connected with one end of the flow field rectifier (11) through threads, and the other end of the absorption cavity (1) is connected with one end of the temperature field homogenizer (2) through a water pipe (4); the other end of the temperature field homogenizer (2) is connected with the inlet of a flow meter (6) through a water pipe (4), the outlet of the flow meter (6) is connected with one end of a water pipe output pipe (9), and the other end of the water pipe output pipe (9) extends out of the shell (13); the other end of the flow field rectifier (11) is connected with one end of a water flow input pipeline (10), and the other end of the water flow input pipeline (10) extends out of the shell (13); the water flow input pipeline (10) and the water flow output pipeline (9) are respectively provided with two paths of water flow temperature measurement thermoelectric sensors (3), the signal output of each path of water flow temperature measurement thermoelectric sensor (3) and the signal output of the flowmeter (6) are respectively connected with the signal acquisition circuit (7) through the electric signal lead (5), and the signal acquisition circuit (7) is electrically connected with an external data processing system (8) through a network interface; the water flow flows into the absorption cavity (1) through the water flow input pipeline (10) and the flow field rectifier (11) in sequence, flows out of the water pipe (4) at the top end of the absorption cavity (1), and flows out of the energy meter through the temperature field homogenizer (2), the flow meter (6) and the water flow output pipeline (9) in sequence; the single-layer solid absorption flat plate (14) is completely immersed in the water fluid of the absorption cavity (1).
2. The immersed total absorption high energy laser power energy meter according to claim 1, wherein: the absorption cavity (1) is internally provided with a structure formed by combining a single-layer solid absorption flat plate (14) and a sieve-hole type solid absorption plate (16), the single-layer solid absorption flat plate (14) is arranged on one side in the absorption cavity (1) and is arranged in parallel with a window optical mirror (15) of the absorption cavity (1), the sieve-hole type solid absorption plate (16) is arranged between the single-layer solid absorption flat plate (14) and the window optical mirror (15) in parallel, the sieve-hole type solid absorption plate (16) and the window optical mirror (15) are separated by a distance, and the separation distance of the sieve-hole type solid absorption plate and the window optical mirror (15) is adjusted according to the wavelength of the laser; the single-layer solid absorption flat plate (14) and the sieve-hole type solid absorption plate (16) are completely immersed in the water fluid of the absorption cavity (1).
3. The immersed total absorption high energy laser power energy meter according to claim 2, wherein: the sieve pore type solid absorption plate (16) is of a round cake-shaped structure, and the center of the sieve pore type solid absorption plate (16) is provided withSeveral tens of circular through holes forMake itThe laser to be measured in the light spot area partially penetrates through the sieve-hole type solid absorption plate (16) through the circular through holes and is incident on the single-layer solid absorption flat plate (14).
4. The immersed total absorption high energy laser power energy meter according to claim 1, wherein: the temperature field homogenizer (2) is of an aluminum barrel-shaped structure, a plurality of groups of grooves are uniformly arranged on the inner wall of the temperature field homogenizer (2), and the number of the grooves is four; a plurality of homogenizing plates (17) are arranged in the temperature field homogenizer (2); the homogenizing plate (17) is a round cake-shaped structure formed by strip-shaped hollow parallel strips, four bumps are uniformly arranged on the outer circle of the homogenizing plate (17), and each homogenizing plate (17) is embedded in four corresponding grooves on the inner wall of the temperature field homogenizer (2) through the bumps; the strip-shaped hollow parallel strips of two adjacent homogenizing plates (17) are arranged at 90 degrees.
5. The immersed total absorption high energy laser power energy meter according to claim 1, wherein: the flow field rectifier (11) is of a rectangular sheet structure, strip-shaped hollow parallel strips are arranged on two sides of the flow field rectifier (11) respectively, and a plurality of circular through holes are formed in the middle of the flow field rectifier.
6. The immersed total absorption high energy laser power energy meter according to claim 1, wherein: the water flow temperature measurement thermoelectric sensor (3) is of a hexagon screw structure, a thermocouple wire and a lead wire are installed in the armor sleeve, the armor sleeve penetrates out of the center of the hexagon screw, and the temperature measurement end is of an exposed end type structure and is arranged at the front end of the armor sleeve.
7. The immersed total absorption high energy laser power energy meter according to claim 1, wherein: the single-layer solid absorption flat plate (14) is made of red copper or duralumin, and the surface treatment of the single-layer solid absorption flat plate (14) is made of oxidation blackening or black ceramic material spraying.
8. The immersed total absorption high energy laser power energy meter according to claim 2, wherein: the sieve pore type solid absorption plate (16) is made of red copper or duralumin, and the surface treatment of the sieve pore type solid absorption plate (16) is made of oxidation blackening or black ceramic material spraying.
9. The immersed total absorption high energy laser power energy meter according to claim 1, wherein: the flow field rectifier (11) is made of hard aluminum or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810626498.0A CN108827463B (en) | 2018-06-19 | 2018-06-19 | Immersion type full-absorption high-energy laser power energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810626498.0A CN108827463B (en) | 2018-06-19 | 2018-06-19 | Immersion type full-absorption high-energy laser power energy meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108827463A CN108827463A (en) | 2018-11-16 |
| CN108827463B true CN108827463B (en) | 2020-05-08 |
Family
ID=64141536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810626498.0A Active CN108827463B (en) | 2018-06-19 | 2018-06-19 | Immersion type full-absorption high-energy laser power energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108827463B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781256A (en) * | 2019-01-31 | 2019-05-21 | 中国科学院理化技术研究所 | A kind of measurement of laser energy method and device |
| CN109861063B (en) * | 2019-04-09 | 2024-02-13 | 武汉锐科光纤激光技术股份有限公司 | Laser copying device |
| CN110261008B (en) * | 2019-06-11 | 2021-12-14 | 北京无线电计量测试研究所 | Water load calorimeter |
| CN111256845B (en) * | 2020-02-10 | 2021-02-05 | 绵阳天和机械制造有限公司 | High-light-efficiency laser power meter |
| CN114543988B (en) * | 2022-02-23 | 2023-11-21 | 武汉锐科光纤激光技术股份有限公司 | Laser power meter |
| CN115235617B (en) * | 2022-08-31 | 2022-12-20 | 中国工程物理研究院激光聚变研究中心 | Laser power measuring system and measuring method |
| CN116625553B (en) * | 2023-07-19 | 2023-09-29 | 中国工程物理研究院应用电子学研究所 | Water absorption type full-absorption high-energy laser power energy measuring device and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148948B (en) * | 2013-02-06 | 2015-05-27 | 西北核技术研究所 | Device for measuring high-energy laser energy |
| CN103471713B (en) * | 2013-09-16 | 2015-06-10 | 中国工程物理研究院应用电子学研究所 | Measurement device, with step-shaped cone, absorbing all energy of high-energy laser |
| CN103630236B (en) * | 2013-12-11 | 2015-12-02 | 中国工程物理研究院应用电子学研究所 | A kind of conical cavity type high-energy laser total-absorption energy meter |
| CN105388549B (en) * | 2015-12-28 | 2018-11-27 | 中国工程物理研究院应用电子学研究所 | A kind of active cooling superlaser absorption plant based on liquid absorption |
-
2018
- 2018-06-19 CN CN201810626498.0A patent/CN108827463B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108827463A (en) | 2018-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108827463B (en) | Immersion type full-absorption high-energy laser power energy meter | |
| CN103389157B (en) | High-energy laser beam expanding and absorbing device | |
| CN102998061B (en) | A kind of diffusion type SF6 Leakage Gas monitoring device and method | |
| CN104048755B (en) | A kind of hypersorption High Energy Laser Energy Meter | |
| Jiang et al. | Characterization of novel mid-temperature CPC solar thermal collectors | |
| CN207703750U (en) | Radiant heating-transpiration-cooling test device | |
| CN204255852U (en) | A kind of CO with temperature and air pressure auto-compensation 2gas concentration inspect device | |
| CN102419214B (en) | Photo-thermal/photo-electrical composite high-energy laser parameter measurement device | |
| CN103616791A (en) | Camera lens heat-insulating cooling and temperature control device | |
| CN103335728A (en) | Uncooled infrared focal plane detector based on plasma lens array | |
| CN102589714A (en) | Temperature measuring device based on high-pressure gas Rayleigh-Brillouin scattering spectrum | |
| CN114279597A (en) | High-precision low-power radiant heat flow meter capable of being used for radiant heat flow tracing calibration | |
| CN102607708A (en) | Infrared measurement device for collected solar flow distribution of solar collector and obtaining method for solar flow distribution graph | |
| CN106911055B (en) | A kind of four-wave mixing mercury vapour pond using tubular type constant temperature oven and cooling collar | |
| CN102053006B (en) | Data processing improvement method for measuring absorption loss of optical element | |
| CN113588136A (en) | Laser power meter | |
| CN106525249B (en) | Mirror surface infrared temperature measuring device and method | |
| CN114543988B (en) | Laser power meter | |
| CN203629789U (en) | Multiple-light-emitting unit semiconductor laser space polarization test device | |
| CN210513418U (en) | Laser measuring device | |
| CN208953128U (en) | Myriawatt power meter | |
| CN106706125B (en) | Laser power sensor | |
| Widyolar et al. | Compound parabolic concentrator for pentagon shape absorber | |
| CN205015085U (en) | High energy laser hypersorption energy measuring device | |
| CN217738981U (en) | Device for measuring thermo-optic coefficient of material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |