CN103471713B - Measurement device, with step-shaped cone, absorbing all energy of high-energy laser - Google Patents
Measurement device, with step-shaped cone, absorbing all energy of high-energy laser Download PDFInfo
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- CN103471713B CN103471713B CN201310421058.9A CN201310421058A CN103471713B CN 103471713 B CN103471713 B CN 103471713B CN 201310421058 A CN201310421058 A CN 201310421058A CN 103471713 B CN103471713 B CN 103471713B
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Abstract
The invention provides a measurement device, with a step-shaped cone, absorbing all energy of a high-energy laser. Light enters an absorbing cavity from the entrance of an energy meter, arrives in a reflection body in an incident mode and can be absorbed by the absorbing cavity after being reflected by the reflection body, and temperature rise of each region of an absorbing body is measured by a temperature measurement component and is combined with quality and specific heat of combustion to work out the energy increment of each region. Water channels are formed in the wall of the reflection body and the wall of the absorbing body respectively, and water is filled into the water channels to bring away most heat. Laser energy brought away by the water can be indirectly worked out through a water circulation component according to temperature changes and flow during the period from the time when the water enters the absorbing body and the reflection body to the time after the water departs from the absorbing body and the reflection body. The total energy of increment lasers can be worked out by a data collecting component according to energy measured by the temperature measurement component and energy measured by the water circulation component. Because the step-shaped emitting cone serves as the reflection body, the absorbing body is of a cylindrical structure, the effect caused by low laser induced damage thresholds, temperature measurement accuracy, heat loss and light energy escaping in the prior art is avoided, and the measurement device has the advantages of being high in efficiency ratio and testing efficiency and the like.
Description
Technical field
The invention belongs to energy measurement of high energy laser fields of measurement, be specifically related to a kind of ladder cone superlaser hypersorption energy measuring apparatus, be applicable to energy measurement of high energy laser and measure.
Background technology
Energy measurement of high energy laser measurement mainly contains two kinds of methods: the first is the indirect method of measurement, namely spectroscope light splitting sampling is adopted, then utilize low middle range power energy measurement mechanism to measure institute and sample laser energy, finally according to measurement result and spectroscopical splitting ratio calculating laser gross energy of low middle range power energy measurement mechanism; The second is the direct method of measurement, and namely utilize energy measuring apparatus to measure laser gross energy, it requires that measurement mechanism can absorb nearly all laser energy, and such device is commonly referred to hypersorption type measurement mechanism.The first metering system, splitting ratio usually easily changes under high light effect, and the accuracy and confidence therefore measured is relatively low.Hypersorption type measuring method is owing to directly will receive higher laser power energy, the temperature rise of absorber usually can be higher, material surface is easy to occur damage, a kind of comparatively effective method is the absorber adopting graphite material to be processed into cone cavity configuration, laser incides absorber inside surface, and be wound around in absorber appearance the temperature rise that thermal resistance wire measures absorber, finally according to the quality of absorber, specific heat and temperature rise calculate the energy of incident laser, article (the Wang Lei etc. of " research of absolute type High Energy Laser Energy Meter temperature characterisitic " by name, applied optics, 2005, 26 (5): 29 ~ 32) what adopt in is exactly this structure.But this absorption structure is to the antibody Monoclonal threshold value limited efficiency improving system, very high power density also must directly be born in absorbent material surface, and the temperature rise of material surface can be very high, and when measuring high power laser light, surface often can be damaged.In addition because laser can, directly from outlet effusion, will make measuring accuracy reduce through absorber surface reflection rear portion light splitting.
Summary of the invention
To overflow the impact caused to overcome threshold for resisting laser damage in prior art low and temperature measurement accuracy, thermal loss and luminous energy, the invention provides a kind of ladder cone superlaser hypersorption energy measuring apparatus.Described measurement mechanism contains:
Energy meter entrance: incide the entrance of energy measuring apparatus for providing a laser;
Absorber: for providing an absorbing laser energy, and the place of sensor thermometric, it comprises V-type groove, ring-like tank and water stream channel;
Ring-like tank: water stream channel is connected by this ring groove and outside water route, and composition surface, outside water route and absorber engaged at end face, under the effect of external screw-thread snap-in force, make ring groove cell wall compressive deformation, thus seal water route.
Reflecting body: for the laser-beam divergence by incidence, to reduce the power density on absorber, it comprises reflection cone, central shaft and the vertex of a cone;
Reflection cone: be made up of two conical surfaces of front and back end and a cylinder of centre, be called that ladder is bored;
Insulator: externally spread for intercepting absorption intimate heat;
Absorbing cavity: one that is made up of absorber and insulator airtight absorbing cavity;
Temperature measurement unit: for detecting absorber temperature rise, and complete the acquisition process of temperature signal;
Water circulation parts: for providing a container be filled with water, and complete the water circulation of pipe system, it comprises water tank, water pump, water pipe, flow monitoring and water temperature detection device;
Data acquisition components: for completing the collection of temperature and flow signal, and the statistical treatment of energy datum.
Described measurement mechanism annexation is: in reflecting body, reflection cone front end is connected with the vertex of a cone by external thread, reflection cone front end is connected with central shaft front end by internal thread, central shaft rear end is communicated with water circulation parts water inlet by screw thread, reflection cone chamber wall water stream channel is communicated with water circulation parts water delivering orifice by screw thread in reflection cone rear end, and reflecting body is connected with insulator by reflection cone rear end screw thread.In temperature measurement unit, temperature sensor adheres on the absorbent body.Water stream channel in absorber, every 10 is one group, in absorber end by a ring-like tank combination, the ring-like tank in absorber rear end is communicated with the water delivering orifice of water circulation parts, the ring-like tank in absorber front end is communicated with the water inlet of water circulation parts, in water circulation parts, water pump is positioned at water tank bottom, Water in Water Tanks is pumped into water pipe, water flows through absorber and reflecting body respectively, and the water flow of absorber and reflecting body water in-out port and water temperature are recorded by the flow monitoring of water circulation parts and water temperature detection device respectively.Data acquisition components is connected by the flow monitoring of wire and temperature measurement unit and water circulation parts and water temperature detection device.
The described measurement mechanism course of work is: insulator is provided with a circular hole, as the entrance of energy meter, light enters absorbing cavity from entrance, incides on reflecting body, after reflecting body reflection, luminous energy is absorbed by absorber, be distributed in the thermocouple sensor of absorber outside surface, measure the temperature rise of absorber, by the temperature of temperature measurement unit according to zones of different, obtain the specific heat of combustion corresponding to this temperature, then calculate the energy increment in this region in conjunction with the quality in this region and temperature rise.Reflecting body and absorption body lumen wall are all provided with water stream channel, and the water delivering orifice of reflecting body is connected with pipeline by screw thread with water inlet, and seals with high-temperature seal adhesive.The water delivering orifice of absorber and water inlet are by red copper annular water tank, and compressive deformation under the effect of external screw-thread snap-in force, engages with outside water route and seal.Water pump is arranged on water tank bottom, is connected with reflecting body by flexible pipe with the water inlet of absorber.Reflecting body is connected with water tank by flexible pipe with the water delivering orifice of absorber.Water circulation parts by water pump oral siphon, at reflecting body, absorber, form a water circulation system between pipeline and water tank by water pump.The energy that data acquisition components is measured according to the thermocouple sensor of absorber outside surface and the energy that water circulation parts are measured, can calculate the gross energy of incident laser.
The present invention adopts reflection cone as reflecting body, stair-stepping reflecting body, effectively can increase the area of dissipation of reflection cone, reduces the power density on the conical surface simultaneously, reflected light can be distributed to region broader on absorber, thus the power density reduced on absorber, reflecting body indoor design has water channel, and current can be converged to the vertex of a cone by the conical surface, converge to the water in vertex of a cone chamber, final by outside central shaft exhaust chamber, current back and forth flow, and take away heat unnecessary on reflecting body.
Absorber of the present invention adopts red copper material, is processed into cylindrical shape, is processed into V-type groove inside barrel simultaneously, and spray cupric oxide stupalith, single absorptivity can reach more than 70%, and the angle of groove is set to 30 to 60 °, and after multiple reflections absorbs, absorptivity can reach more than 90%.Simultaneously at absorber inwall fluting, as water stream channel, reduced the temperature of absorber by water flowing.Every 10 of water stream channel is one group, in absorber end by a ring-like tank combination, annular water tank cell wall is processed by red copper, absorber water route is connected by this ring groove and outside water route, 10 water stream channels on the corresponding absorbing cavity in outside every bar water route, and sealing waterway is carried out by compacting red copper ring shaped slot on composition surface.Absorber and insulator form an airtight absorbing cavity, and chamber internal diameter is larger than opening, and therefore few from the luminous energy of opening spilling, thermal loss reduces greatly.
Accompanying drawing explanation
Fig. 1 is ladder of the present invention cone superlaser hypersorption energy measuring apparatus structural representation;
Fig. 2 a and Fig. 2 b is the arrangement of reflectors structural representation in the present invention;
Fig. 2 a is the sectional view of arrangement of reflectors;
Fig. 2 b is the left view of arrangement of reflectors;
Fig. 3 a, Fig. 3 b and Fig. 3 c are the absorber V-type groove structural representation in the present invention;
Fig. 3 a is the sectional view of absorber;
Fig. 3 b is Fig. 3 a view section figure;
Fig. 3 c is the partial enlarged view of absorber V-type groove;
Fig. 4 a and Fig. 4 b is water flowing sink structure schematic diagram in the absorber in the present invention;
Fig. 4 a is absorber end view;
Fig. 4 b is absorber end face partial enlarged view;
In figure: 1. ring-like tank 14. water stream channel of energy meter entrance 2. absorber 3. reflecting body 4. insulator 5. absorbing cavity 6. temperature measurement unit 7. water circulation parts 8. data acquisition components 9. reflection cone 10. central shaft 11. vertex of a cone 12.V type groove 13..
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is ladder cone superlaser hypersorption energy measuring apparatus structural representation, and wherein thin arrow mark is the direction of propagation of laser, thick arrow mark be flow direction.In Fig. 1, laser enters absorbing cavity 5 from energy meter entrance 1, incides on reflecting body 3, stepped reflection cone 9, and conical surface sandblasting is gold-plated, formed diffuse reflection surface, laser through reflecting body 3 diffuse reflection to whole absorbing cavity 5.Absorber 2 and insulator 4 form an airtight absorbing cavity 5, and laser is fully absorbed by absorbing cavity 5.In water circulation parts 7, water tank bottom is provided with submersible pump, can be pumped in pipeline by water, after in pipeline, water flows through absorber 2 and reflecting body 3 respectively, again passes back in water tank.Above-mentioned part is connected by pvc pipe road and forms a water circulation system, and the difference variation of current is recorded by the point for measuring temperature at absorber 2 and the respective two ends of reflecting body 3 respectively, and flow is recorded by flowmeter.In temperature measurement unit 6, temperature sensor sticks to absorber 2 outside surface by high-temp glue, and is connected with data acquisition components 8 by lead-in wire, and data acquisition components 8 possesses temperature acquisition, calculating, display and memory function.
Fig. 2 a and Fig. 2 b is arrangement of reflectors structural representation, and wherein arrow mark is flow direction.In Fig. 2 a and Fig. 2 b, reflection cone 9 outside surface is made up of two, the two ends conical surface and a middle cylinder, and two conical surface sandblastings are gold-plated, forms diffuse reflection surface, is used for carrying out diffuse scattering to incident laser.The gold-plated one-tenth minute surface of cylinder between two conical surfaces, this structure is convenient to reflecting body 3 and is dispelled the heat, and meets the requirement of diffuse scattering homogenising.Reflection cone 9 is bored wall and is designed with 16 water stream channels, water stream channel entrance is connected by screw thread and outside water route, current bore underflow to the vertex of a cone 11 by Fig. 2 a and Fig. 2 b, chilled water converges at the vertex of a cone 11, discharged by central shaft 10 again, central shaft 10 passage cross section is long-pending, and to amass sum equal with boring wall passage cross section, thus reduce current pressure drag, and flow velocity is even.Reflection cone 9 and central shaft 10 and the vertex of a cone 11 are respectively by being threaded, and central shaft 10 exports to be connected by screw thread and outside water route, and the place of being screwed is coated with high-temperature seal adhesive and seals.
Fig. 3 a, absorber 2 in Fig. 3 b and Fig. 3 c is a cylindrical cavity structure, absorber 2 inside surface is provided with V-type groove 12, it is inner that V-type groove 12 is evenly distributed in absorber 2 hollow cavity, and the top of absorbing cavity hollow cavity is extended to from the bottom of absorber 2 hollow cavity, the quantity of V-type groove 12 is 4 hundred to nine hundred, two groove face angles of V-type groove 12 are 30 ° to 60 °, laser irradiation area can be increased by arranging V-type groove 12, reduce the laser power density inciding material surface, in addition due to incide V-type groove 12 inside light beam after reflecting body 3 diffuse reflection most of light beam still in V-type groove 12 internal reflection, therefore will significantly reduce from the energy of absorber 2 inside effusion.
In Fig. 4 a and Fig. 4 b, water stream channel 14 offered by absorber 2 chamber wall, reduced the temperature of absorber 3 by water flowing.Water stream channel 14 every ten is one group, combined by a ring-like tank 13 in absorber 2 end, annular water tank 13 cell wall is processed by red copper, absorber 2 water route is connected by this ring groove and outside water route, outside composition surface, water route and absorber 2 engaged at end face, under the effect of external screw-thread snap-in force, make ring groove cell wall compressive deformation, thus water route is sealed.
The external auxiliary device of the present invention mainly comprises a few part such as computing machine, Acquisition Circuit, power supply, software and supporting cable and forms, Acquisition Circuit and power supply can load in corresponding cabinet, circuit cabinet and power case can independently also can integrate mutually, separately can reduce the electromagnetic interference (EMI) of power supply to circuit, circuit and power supply are all fixed in the middle of cabinet, can prevent the current in emergency circumstances overflowed from causing short circuit consequence.The data gathered are sent in computing machine by serial ports, and are undertaken calculating and showing by software.
Measurement mechanism of the present invention is arranged on hydraulic elevating platform, and conveniently can carry and regulate optical axis height, hydraulic elevating platform is connected by screw rod with measurement mechanism of the present invention.
Claims (9)
1. a ladder cone superlaser hypersorption energy measuring apparatus, is characterized in that: described measurement mechanism contains
Absorber (2): for providing an absorbing laser energy, and the place of sensor thermometric, comprise V-type groove (12), ring-like tank (13) and water stream channel (14);
Ring-like tank (13): water stream channel (14) is connected by ring-like tank (13) and outside water route, outside composition surface, water route and absorber (2) engaged at end face, under the effect of external screw-thread snap-in force, make ring-like tank cell wall compressive deformation, thus water route is sealed;
Reflecting body (3): for the laser-beam divergence by incidence, to reduce the power density on absorber (2), comprises reflection cone (9), central shaft (10) and the vertex of a cone (11);
Reflection cone (9): form ladder by two conical surfaces of front and back end and a cylinder of centre and bore;
Insulator (4): externally spread for intercepting absorber (2) interior heat;
Absorbing cavity (5): one that is made up of absorber (2) and insulator (4) airtight absorbing cavity;
Temperature measurement unit (6): for detecting absorber (2) temperature rise, and complete the acquisition process of temperature signal;
Water circulation parts (7): for providing a container be filled with water, and complete the water circulation of pipe system, it comprises water tank, water pump, water pipe, flow monitoring and water temperature detection device;
Data acquisition components (8): for completing the collection of temperature and flow signal, and the statistical treatment of energy datum;
Described measurement mechanism annexation is: reflection cone (9) front end in reflecting body (3) is connected with the vertex of a cone (11) by external thread, reflection cone (9) front end is connected with central shaft (10) front end by internal thread, central shaft (10) rear end is communicated with water circulation parts (7) water inlet by screw thread, reflection cone (9) chamber wall water stream channel is communicated with water circulation parts (7) water delivering orifice by screw thread in reflection cone (9) rear end, and reflecting body (3) is connected with insulator (4) by reflection cone (9) rear end screw thread;
In temperature measurement unit (6), temperature sensor sticks on absorber (2);
Water stream channel (14) in absorber (2), every ten is one group, in absorber (2) end by ring-like tank (13) combination, the ring-like tank in absorber (2) rear end (13) is communicated with the water delivering orifice of water circulation parts (7), the ring-like tank (13) of absorber (2) front end is communicated with the water inlet of water circulation parts (7), in water circulation parts (7), water pump is positioned at water tank bottom, Water in Water Tanks is pumped into water pipe, water flows through absorber (2) and reflecting body (3) respectively, the water flow of absorber (2) and reflecting body (3) water in-out port and water temperature are recorded by the flow monitoring of water circulation parts (7) and water temperature detection device respectively,
Data acquisition components (8) is connected by the flow monitoring of wire and temperature measurement unit (6) and water circulation parts (7) and water temperature detection device.
2. ladder cone superlaser hypersorption energy measuring apparatus according to claim 1, is characterized in that: the scope of described reflection cone (9) conical surface cone angle is 30 ° ~ 60 °.
3. ladder cone superlaser hypersorption energy measuring apparatus according to claim 1, is characterized in that: described reflection cone (9) adopts red copper cast to form.
4. ladder cone superlaser hypersorption energy measuring apparatus according to claim 1, is characterized in that: (9) two conical surface sandblastings of described reflection cone are gold-plated, and thickness of coating is 5 microns.
5. ladder cone superlaser hypersorption energy measuring apparatus according to claim 1, it is characterized in that: described reflection cone (9) cone wall is designed with 16 water stream channels, water stream channel cross-sectional area sum is equal with central shaft (10) water stream channel cross-sectional area, and reflection cone (9) is coated with high-temperature seal adhesive with central shaft (10) and the vertex of a cone (11) place of being screwed and seals.
6. ladder cone superlaser hypersorption energy measuring apparatus according to claim 1, it is characterized in that: described absorber (2) adopts red copper material, be processed into cylindrical shape, absorber (2) inside surface be provided with V-type groove (12), groove face spray cupric oxide stupalith.
7. ladder cone superlaser hypersorption energy measuring apparatus according to claim 1, it is characterized in that: on described absorber (2) inside surface, V-type groove (12) is evenly distributed in absorber (2) hollow cavity inside, and extends to the top of absorber (2) hollow cavity from the bottom of absorber (2) hollow cavity.
8. ladder cone superlaser hypersorption energy measuring apparatus according to claim 1, it is characterized in that: the quantity of described V-type groove (12) is 4 hundred to nine hundred, the scope of two groove face angles of V-type groove (12) is 30 ° ~ 60 °.
9. ladder cone superlaser hypersorption energy measuring apparatus according to claim 1, is characterized in that: ring-like tank (13) cell wall of described absorber (2) end is processed by red copper.
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Cited By (1)
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| CN108957767A (en) * | 2018-07-16 | 2018-12-07 | 湖北三江航天红林探控有限公司 | High power light energy choking device |
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| CN104048755B (en) * | 2014-05-21 | 2015-11-18 | 西北核技术研究所 | A kind of hypersorption High Energy Laser Energy Meter |
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| CN105606214B (en) * | 2015-12-28 | 2018-05-18 | 湖南华曙高科技有限责任公司 | Calibrate the devices and methods therefor of laser power |
| CN108827463B (en) * | 2018-06-19 | 2020-05-08 | 中国工程物理研究院应用电子学研究所 | Immersion type full-absorption high-energy laser power energy meter |
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| 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 |
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