CN111427400A - Automatic near-infrared laser variable beam expanding irradiation temperature control system and method - Google Patents
Automatic near-infrared laser variable beam expanding irradiation temperature control system and method Download PDFInfo
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- CN111427400A CN111427400A CN202010338787.8A CN202010338787A CN111427400A CN 111427400 A CN111427400 A CN 111427400A CN 202010338787 A CN202010338787 A CN 202010338787A CN 111427400 A CN111427400 A CN 111427400A
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Abstract
The automatic near-infrared laser variable beam expanding irradiation temperature control system comprises a variable beam expanding system, an adjusting bracket and a temperature control system, wherein the temperature control system comprises a box body, the top of the box body is provided with a sample placing area, and the edge of the box body is fixed with the adjusting bracket; the adjusting bracket comprises a vertically arranged telescopic rod, and the top of the telescopic rod is connected with a variable beam expanding system positioned above the box body through an adjusting rod; a scale parallel to the telescopic rod is arranged at the top of the temperature control system; the variable beam expanding system comprises a lens cone, and two ends of an adjusting rod are respectively fixed with the top of the telescopic rod and the outer wall of the lens cone; a lens is arranged in the lens barrel, the lens barrel is bottomless, and the top of the lens barrel is provided with an interface; the lower part of the lens cone is provided with an infrared thermal sensing device, and the infrared thermal sensing device comprises a probe and a rotation adjusting device. The infrared temperature control method comprises the following steps: pre-writing a program, adjusting the position of a beam expanding system, adjusting a lens, setting a target temperature, and raising the temperature to the target temperature. The invention can solve the technical problems that the laser equipment needs to be closed at any time and the operation is inconvenient in the operation of the traditional instrument.
Description
Technical Field
The invention belongs to the technical field of infrared laser instrument equipment, and particularly relates to an automatic near-infrared laser variable beam expanding irradiation temperature control system and method.
Background
The application of near infrared laser in materials science, chemistry and medicine is more and more extensive, for example, the fields such as tumour treatment, sea water desalination are all related to. In the case of tumor therapy, tumor is a disease with high lethality. The existing method for treating tumors also comprises the means of chemotherapy, radiotherapy, biological treatment and the like besides local surgery. Other regimens than surgery are collectively referred to as conservative treatment regimens, mainly for patients with advanced tumor stages. The effects of conservative treatment are limited and have more significant side effects. The side effects of conservative therapy are mainly due to lack of targeting and the inability to accurately kill tumor cells. Near-infrared photothermal therapy is a relatively advanced exploration direction in the current tumor therapy. Tumor cells phagocytizing nanoparticles with photothermal therapy effect are irradiated by near infrared light (NIR), and efficient and accurate targeted killing effect on the tumor cells can be realized. The principle of photothermal therapy is based on that some nanoparticles with special physicochemical properties can absorb near-infrared laser (such as 808nm laser, 1064nm laser and the like) to generate heat, and tumor cells are killed in a directional manner. In the current scientific research experiments on photothermal therapy, the process is realized in vitro or in vivo experiments. In scientific researches such as seawater desalination by using near-infrared thermal effect, nano particles are enabled to absorb energy to generate heat by using near-infrared laser, and then seawater is desalinated by evaporation. Although the implementation objects are different, the process is similar. In conclusion, the near-infrared laser equipment is important equipment which must be used in tumor photothermal treatment or corresponding engineering science and scientific research work. At present, a common near-infrared laser system mainly comprises a laser emission source, a laser conduction optical fiber and a laser beam expanding lens group. The laser emission source generates near-infrared fine-beam laser with certain energy, the laser is conducted through the laser conduction optical fiber, and near-infrared light with certain diameter is formed after beam expansion is carried out through the beam expanding lens. In the corresponding scientific research work, the objects irradiated by the laser may be different with different specific experimental projects. For example, in research work for tumor therapy, tumor-bearing models or other models of live animals, cells in 96-well plates, cells in 24-well plates, cells in 12-well plates, cells in 6-well plates, different-sized culture dishes, etc. are possible. And in other engineering and scientific research works may not be vessels of different sizes, etc. These different laboratory animals or equipment are different in size and therefore require different diameters of the near infrared laser beam. The temperature of an irradiated object is a very important parameter in near-infrared laser photothermal scientific research. The temperature of the irradiated object reflects the level of absorption of the near-infrared laser energy by the material. Different experiments may require different temperatures. The determination of temperature is an important step in the experiment. The current methods for measuring temperature include thermometers, infrared thermal imagers, and the like. These devices are either inconvenient to use or cumbersome and complicated to instrument. Because the temperature measurement system is independent of the near-infrared laser generation system, the requirement of higher accuracy on the near-infrared heating temperature is met in partial scientific research experiments. The traditional temperature measurement method is obviously not beneficial to the convenient, effective and accurate experiment. In many scientific research experiments, the irradiation of the near-infrared laser needs a certain time, which means that scientific research workers need to monitor the temperature all the time to close the near-infrared laser generating equipment at any time, and the precious time of the scientific research workers is also consumed.
The patent No. CN200810127017 provides a laser generator with concentrated energy, which has high heating speed but still can not automatically control the on-off of the light beam.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an automatic near-infrared laser variable beam expanding irradiation temperature control system and method, namely, the automatic near-infrared laser variable beam expanding irradiation and temperature control system integrating a near-infrared laser variable beam expanding system and a temperature sensing control system is used for solving the technical problems that laser equipment needs to be closed at any time and operation is inconvenient in the operation of the traditional instrument.
The invention adopts the following technical scheme:
an automatic near-infrared laser variable beam expanding irradiation temperature control system comprises a variable beam expanding system, an adjusting bracket and a temperature control system,
the temperature control system comprises a box body, wherein a sample placing area is arranged at the top of the box body, an adjusting bracket is fixed at the edge of the box body, and a power connecting wire input socket, a main power switch, a power connecting wire output socket, an adjusting knob, a display screen, an adjusting button and an indicator lamp are further arranged on the side wall of the box body;
the adjusting bracket comprises a vertically arranged telescopic rod, and the top of the telescopic rod is connected with a variable beam expanding system positioned above the box body through an adjusting rod; a scale parallel to the telescopic rod is arranged at the top of the temperature control system;
the variable beam expanding system comprises a lens barrel, and two ends of the adjusting rod are respectively fixed with the top of the telescopic rod and the outer wall of the lens barrel; a first lens, a second lens and a third lens are sequentially arranged in the lens barrel from top to bottom, the first lens and the third lens are concave lenses, the second lens is a convex lens, the lens barrel is bottomless, and an interface is arranged at the top of the lens barrel; the lower part of the lens cone is provided with an infrared thermal sensing device, the infrared thermal sensing device comprises a probe and a rotation adjusting device, and the probe is connected below the lens cone through the rotation adjusting device.
Preferably, the first lens, the second lens and the third lens are respectively fixed in the lens barrel by a first fixing part, a second fixing part and a third fixing part.
Preferably, the first fixing piece, the second fixing piece and the third fixing piece are all screws; the side wall of the lens barrel is symmetrically provided with a pair of grooves along the height direction, the tail end of each screw extends into the screw holes in the side walls of the first lens, the second lens and the third lens respectively for internal screw connection, and a rubber pad is arranged between the nut part of each screw and the outer wall of the lens barrel.
Preferably, the outer wall of the lens barrel is provided with a scale, and the lens barrel is provided with three marks which respectively correspond to the initial positions of the first fixing part, the second fixing part and the third fixing part.
Preferably, the rotation adjusting device comprises a first rod piece, a second rod piece and a hinge, and the first rod piece and the second rod piece are connected through the hinge.
Preferably, the bottom of the lens barrel extends out of the first rod piece, the rotation adjusting device is a universal joint, and the probe is connected to the first rod piece through the universal joint.
Preferably, the telescopic rod comprises an upper part and a lower part, the lower part is a hollow cylindrical shell and is thicker than the upper part, and the upper part can be retracted into the lower part; the upper part and the lower part are fixed through a fastener; the adjusting rod is a plastic rod.
Preferably, the fastener is a bolt, the upper portion is provided with a plurality of holes in the height direction, the top of the side wall of the lower portion is provided with a fixing hole, and when the fastener is fixed, a certain hole in the upper portion and the fixing hole in the lower portion are aligned and then the bolt is inserted for fixing.
Preferably, the adjusting buttons are four, namely a reset button, a +0.1 ℃ button, a-0.1 ℃ button and a temperature upper/lower limit selecting button.
An automatic temperature control method for variable beam expanding irradiation of near-infrared laser comprises the following steps:
s1: the program is pre-written into the singlechip and connected with the circuit;
s2: placing a sample to be irradiated in a sample placing area at the top of the box body, connecting an interface of the near-infrared laser fiber to a joint, and adjusting the height of the beam expanding system and the angle of the infrared temperature control sensor according to experimental requirements;
s3: placing three lenses in the lens group at three positions identified by the mark, and then adjusting the first lens and the third lens according to the diameter of the sample;
s4: setting a target temperature and switching on a circuit;
and S5, when the temperature gradually rises until the temperature is higher than the preset target temperature, the circuit buzzer alarms, meanwhile, the electromagnetic relay switch R L1 is closed, the near-infrared laser power supply circuit is disconnected, and at the moment, the near-infrared laser irradiation is finished.
Preferably, in step S3, assuming that the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the initial distance between the first lens and the second lens is e1, the initial distance between the second lens and the third lens is e2, the distance of the first lens moving with respect to the initial position is Δ d1, and the moving amount of the third lens is Δ d2, the following relations are satisfied:
and finally, the integral beam expanding multiplying power of the beam expanding system meets the following relational expression:
wherein β 2(Δ d1) satisfies the following relation:
preferably, the step of setting the target temperature in step S4 is: firstly clicking 'temperature upper/lower limit selection' in an adjusting button, selecting the temperature to be changed, then clicking '0.1℃', '0.1℃' in the adjusting button according to the requirement to adjust, and increasing or decreasing the temperature by 0.1 ℃ every time the adjusting button is pressed until the target temperature value is reached.
The invention has the following positive and beneficial effects:
according to the scheme, the diameter of the near-infrared laser beam can be simply and conveniently adjusted according to the requirement, meanwhile, the temperature sensing control system can be utilized to automatically control the on-off of the near-infrared laser source, and the workload of scientific research workers is greatly reduced.
Drawings
Fig. 1 is a front appearance view of an automatic near-infrared laser variable beam expanding irradiation temperature control system designed in the patent.
FIG. 2 is a front view of a beam expansion system portion of an automated near-infrared laser variable beam expansion illumination temperature control system.
FIG. 3 is a side view of a beam expansion system portion of an automated near-infrared laser variable beam expansion illumination temperature control system.
FIG. 4 is a diagram of a lens structure used in a beam expanding system of an automated near-infrared laser variable beam expanding irradiation temperature control system.
FIG. 5 is a block diagram of a portion of an adjustment bracket of the variable expanded beam system.
FIG. 6 is an external view of a temperature control portion of the automated near-infrared laser variable beam expanding irradiation temperature control system.
Fig. 7 is a schematic diagram of an automated near-infrared laser variable beam expansion irradiation temperature control system.
Fig. 8 is a circuit implementation diagram of a temperature measurement system in an automated near-infrared laser variable beam expanding irradiation temperature control system consistent with this patent.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
The following examples are given for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. It will be apparent to those skilled in the art that other variations and modifications can be made in the invention without departing from the spirit of the invention, and it is intended to cover all such modifications and variations as fall within the true spirit of the invention.
The technical solutions of the present patent will be described below in conjunction with the drawings in the text, and the described embodiments are some, but not all embodiments of the present patent. Can be flexibly changed and applied according to the needs in the actual scientific research work. Based on the embodiments in this patent, those skilled in the art can obtain all other embodiments without creative work, such as changing the connection mode, changing the lens combination of the beam expanding system without causing any damage, changing the type of the temperature sensor (for example, changing the infrared temperature measurement sensing to the contact temperature measurement sensing), changing the type of other elements, and the like, all of which are not innovative inventions different from this patent, and the corresponding contents all belong to the protection scope of this patent. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only described in terms of pure orientations according to the drawings, and are not mandatory in terms of mechanical engineering, and should not be limited in actual construction, operation and application, so the description of the orientations herein should not be construed as limiting the application of the present patent entity. Furthermore, unless specifically emphasized, the terms "first," "second," and "third" are used herein for descriptive purposes only and not for purposes of limitation. In the description of the present invention, it should be noted that, since the structure of this patent is a completely new design, unless explicitly stated or limited otherwise, the engineering descriptions of the terms "mounting", "connecting", etc. should be interpreted broadly, and the same mechanical structures as those in the drawings should be interpreted broadly. For example, the connection may be a fixed connection, a detachable connection, or an integrated connection; the connection can be mechanical connection or welding; the connection may be direct through various means, indirect through screws or springs, or through various engineering tools to try the communication between the interior of the two elements. The screw as drawn in the drawing can be any other connecting tool such as a rivet and the like which can realize the practical clinical application of the patent in the real manufacturing. Therefore, specific meanings of the above terms in the present invention can be understood in specific cases by those of ordinary skill in the art, and should not be limited by the drawings herein as actually made. It should be emphasized that some portions of this patent are based on the existing scientific engineering principles and patents, such as the principles of the laser zoom beam expanding system, the working principles and patents of the single chip, the display and the infrared temperature sensor, etc., and the specific contents of these principles and patents will not be described again if not necessary.
Referring to the figures, the automatic near-infrared laser variable beam expanding irradiation temperature control system comprises a variable beam expanding system 1, an adjusting bracket 2 and a temperature control system 3,
referring to fig. 1 and 6, the temperature control system 3 includes a box body 3.2, a sample placement area 3.1 is arranged at the top of the box body 3.2, an adjusting bracket 2 is fixed at the edge, and a power connecting line input socket 3.3, a main power switch 3.4, a power connecting line output socket 3.5, an adjusting knob 3.6, a display screen 3.7, an adjusting button 3.8 and an indicator light 3.9 are further arranged on the side wall of the box body 3.2;
referring to fig. 1 and 5, the adjusting bracket 2 comprises a vertically arranged telescopic rod 2.1, and the top of the telescopic rod 2.1 is connected with the variable beam expanding system 1 located above the box body 3.2 through an adjusting rod 2.1.2; a ruler 2.2 parallel to the telescopic rod 2.1 is arranged at the top of the temperature control system 3;
referring to fig. 2, the variable beam expanding system 1 includes a lens barrel 1.5, and two ends of the adjusting rod 2.1.2 are respectively fixed to the top of the telescopic rod 2.1 and the outer wall of the lens barrel 1.5; a first lens 1.2, a second lens 1.3 and a third lens 1.4 are sequentially arranged in the lens barrel 1.5 from top to bottom, the first lens 1.2 and the third lens 1.4 are concave lenses, the second lens 1.3 is a convex lens, the lens barrel 1.5 is bottomless, and the top of the lens barrel is provided with an interface 1.1; an infrared heat sensing device 1.8 is arranged at the lower part of the lens barrel 1.5, the infrared heat sensing device 1.8 comprises a probe 1.8.1 and a rotary adjusting device 1.8.2, and the probe 1.8.1 is connected below the lens barrel 1.5 through the rotary adjusting device 1.8.2.
Referring to fig. 3 and 4, further, the first lens 1.2, the second lens 1.3, and the third lens 1.4 are respectively fixed in the lens barrel 1.5 by a first fixing element 1.2.1, a second fixing element 1.3.1, and a third fixing element 1.4.1.
Further, the first fixing piece 1.2.1, the second fixing piece 1.3.1 and the third fixing piece 1.4.1 are all screws; the side walls of the lens barrel 1.5 are symmetrically provided with a pair of grooves 1.6 along the height direction, the tail ends of all the screws respectively extend into screw holes in the side walls of the first lens 1.2, the second lens 1.3 and the third lens 1.4 to be in threaded connection, and a rubber pad is arranged between the nut part of each screw and the outer wall of the lens barrel 1.5. The rubber pad can increase the frictional force between the nut part of the screw and the outer wall of the lens barrel 1.5, and prevent the lens from sliding off.
Furthermore, the outer wall of the lens barrel 1.5 is provided with a scale 1.7, the lens barrel 1.5 is provided with three marks 1.9, and the marks 1.9 respectively correspond to the initial positions of the first fixing part 1.2.1, the second fixing part 1.3.1 and the third fixing part 1.4.1.
Further, the rotation adjusting device 1.8.2 includes a first rod, a second rod and a hinge, and the first rod and the second rod are connected through the hinge.
Furthermore, the bottom of the lens barrel 1.5 extends out of the first rod piece, the rotation adjusting device 1.8.2 is a universal joint, and the probe 1.8.1 is connected to the first rod piece through the universal joint. A 360 rotation of the probe 1.8.1 can be achieved by means of a universal joint.
Further, the telescopic rod 2.1 comprises an upper part and a lower part, the lower part is a hollow cylindrical shell, the lower part is thicker than the upper part, and the upper part can be retracted into the lower part; the upper part and the lower part are fixed by a fastener 2.1.1; the adjusting rod 2.1.2 is a plastic rod. The plasticity pole can be the universal soft pole of metal system of outsourcing silica gel, and its material is unanimous with the gooseneck of desk lamp, the gooseneck pole of cell phone stand etc..
Further, the fastening piece 2.1.1 is a bolt, a plurality of holes are formed in the upper portion in the height direction, fixing holes are formed in the top of the side wall of the lower portion, and when the fastening piece is fixed, a certain hole in the upper portion and the fixing hole in the lower portion are aligned and then the bolt is inserted for fixing. The telescopic rod 2.1 can be fixed after being adjusted.
Further, the adjusting buttons 3.8 are set to four, namely a reset button, +0.1 ℃ button, -0.1 ℃ button and a temperature upper/lower limit selecting button.
An automatic temperature control method for variable beam expanding irradiation of near-infrared laser comprises the following steps:
s1: the program is pre-written into the singlechip and connected with the circuit;
s2: a sample to be irradiated is placed in a sample placing area 3.1 at the top of a box body 3.2, an interface of a near-infrared laser optical fiber is connected to a joint 1.1, and the height of a beam expanding system and the angle of an infrared temperature control sensor are adjusted according to experiment requirements;
s3: placing three lenses in the lens group at three positions identified by the reference 1.9, and then adjusting the first lens 1.2 and the third lens 1.4 according to the diameter of the sample;
s4: setting a target temperature and switching on a circuit;
and S5, when the temperature gradually rises until the temperature is higher than the preset target temperature, the circuit buzzer alarms, meanwhile, the electromagnetic relay switch R L1 is closed, the near-infrared laser power supply circuit is disconnected, and at the moment, the near-infrared laser irradiation is finished.
Further, in step S3, assuming that the focal length of the first lens 1.2 is f1, the focal length of the second lens 1.3 is f2, the focal length of the third lens 1.4 is f3, the initial distance between the first lens 1.2 and the second lens 1.3 is e1, the initial distance between the second lens 1.3 and the third lens 1.4 is e2, the distance that the first lens 1.2 moves with respect to the initial position is Δ d1, and the moving amount of the third lens 1.4 is Δ d2, the following relations are satisfied:
and finally, the integral beam expanding multiplying power of the beam expanding system meets the following relational expression:
wherein β 2(Δ d1) satisfies the following relation:
further, the step of setting the target temperature in step S4 is: firstly clicking ' temperature upper/lower limit selection ' in an adjusting button 3.8, selecting the temperature to be changed, then clicking +0.1℃ ' and ' -0.1℃ ' in the adjusting button 3.8 according to requirements to adjust, and increasing or decreasing the temperature by 0.1 ℃ every time the adjusting button is pressed until the target temperature value is reached.
When the temperature of the near-infrared laser irradiation object is above the set temperature range, the near-infrared laser circuit is automatically switched off, and the near-infrared laser is switched off; when the temperature of the near-infrared laser irradiation object is below the set temperature range, the near-infrared laser circuit is started, and the near-infrared laser is started. And further realize accurate control and automatic control of the near-infrared laser system.
As shown in particular in figures 1-3. The figure is a front appearance view of an embodiment of the automatic near-infrared laser variable beam expanding irradiation temperature control system designed by the patent. The patent comprises three parts: the device comprises a variable beam expanding system 1, an adjusting bracket 2 and a temperature control system 3. The near infrared light is expanded to a suitable diameter by the variable beam expanding system 1. The adjusting bracket 2 is used for adjusting the height of the lens group of the variable beam expanding system, and meanwhile, the adjusting bracket 2 is hollow and internally provided with necessary circuits through an infrared temperature control probe. The temperature control system 3 is internally provided with a group of automatic control circuits for realizing the temperature control function.
The front view of the variable beam expanding system 1 is shown in fig. 2. The interface 1.1 is a near-infrared laser optical fiber standard interface and is used for connecting a near-infrared laser optical fiber. The interface 1.1 is connected with the lens barrel 1.5. The barrel 1.5 is a light-tight optical barrel, inside which there are lens groups: the lens barrel comprises a first lens 1.2, a second lens 1.3 and a third lens 1.4, wherein a bottomless structure is arranged below a lens barrel 1.5 so as to allow light to pass through, and hollow grooves are formed in two sides of the lens barrel so as to allow fixing pieces for adjusting the lenses to pass through. The first lens 1.2, the second lens 1.3 and the third lens 1.4 are lens groups of the variable beam expanding system, wherein the first lens 1.2 and the third lens 1.4 are concave lenses, and the second lens 1.3 is a convex lens, so that the design avoids the convergence of laser in the lens barrel, thereby causing high temperature points or abnormal light paths. The fixing parts I1.2.1, the fixing parts II 1.3.1 and the fixing parts III 1.4.1 are respectively arranged on two sides of the first lens 1.2, the second lens 1.3 and the third lens 1.4, and each fixing part penetrates through the hollow groove structures on two sides of the lens cone 1.5 to fix and adjust the corresponding lens. The lower part of the lens barrel 1.5 is provided with an infrared heat sensing device 1.8, wherein 1.8.1 is a probe device, 1.8.2 is a rotation adjusting device, and the probe 1.8.1 can be positioned at the optimal receiving position by adjusting the rotation device 1.8.2. The range of rotation of the probe 1.8.2 is 0-360 deg. depending on the design requirements. The side view of the variable beam expanding system 1 is shown in fig. 3. The relationship between the first fastener 1.2.1, the second fastener 1.3.1, the third fastener 1.4.1 and the slot 1.6 is described here with emphasis. The first fixing piece 1.2.1, the second fixing piece 1.3.1 and the third fixing piece 1.4.1 are composed of a part with a larger diameter and a part with a smaller diameter. The part with the smaller diameter penetrates through the hollowed-out groove 1.6 and is connected with the first lens 1.2, the second lens 1.3 and the third lens 1.4, and the connecting structure is a threaded structure. When the parts of the first fixing part 1.2.1, the second fixing part 1.3.1 and the third fixing part 1.4.1 with smaller diameters are tightly connected with the corresponding lenses, namely, are tightly twisted, the parts of the first fixing part 1.2.1, the second fixing part 1.3.1 and the third fixing part 1.4.1 with larger diameters are tightly attached to the lens barrel 1.5, and the lenses are fixed by means of friction force with the outer wall of the lens barrel 1.5. In order to increase the friction force, a rubber pad can be arranged between the fixed part and the outer wall of the lens barrel 1.5. In one embodiment of the present invention, each fixing element may be a screw, and a nut of the screw is a portion with a larger diameter and a screw is a portion with a smaller diameter. A scale 1.7 is arranged on one side of the groove 1.6 and used for adjusting the reference of the lens fixing firmware. Three marks 1.9 are arranged on one side of the scale 1.7, the marks 1.9 are used for marking the initial position of each lens fixing piece, and the magnification of the initial position is 1X.
The specific structure of the lens is shown in fig. 4. The first lens 1.2, the second lens 1.3 and the third lens 1.4 are similar in structure, and the first lens 1.2 is taken as an example for description. The side wall of the first lens 1.2 is provided with a hole 1.2.2 matched with the second fixing piece 1.3.1 at a symmetrical position, and the first fixing piece 1.2.1 is in threaded connection with the hole 1.2.2. The first fastening element 1.2.1 can be twisted loose or tight. When the first fixing member 1.2.1 is loosened, the first fixing member 1.2.1 is no longer in contact with the lens barrel 1.5, the first lens 1.2 can be moved and the height of the first lens can be moved, and when the first fixing member 1.2.1 is tightened, the first fixing member 1.2.1 is in close contact with the lens barrel 1.5, and the first lens 1.2 is fixed. The fixing and adjusting manners of the second lens 1.3 and the third lens 1.4 are the same, and therefore, the detailed description is omitted.
The conditioning bracket portion of the variable expanded beam system is shown in fig. 5. The adjusting bracket 2 comprises a telescopic rod 2.1. The telescopic rod 2.1 comprises a thicker lower part and a thinner upper part, the lower part of the telescopic rod is of a hollow structure, the lower part can accommodate the circuit of the infrared temperature sensor 1.8, the upper part can also be retracted to adjust the height, and then the height of the variable beam expanding system is adjusted, and the upper part and the lower part can be fixed through a fastener 2.1.1. Preferably, the fastening member 2.1.1 is a bolt, the upper portion is provided with a plurality of holes in the height direction, the top of the side wall of the lower portion is provided with a fixing hole, and when the fastening member is fixed, a certain hole of the upper portion and the fixing hole of the lower portion are aligned and then the bolt is inserted for fixing. The telescopic rod 2.1 is connected with the variable beam expanding system through a plastic rod, the plastic rod has certain plasticity, and the position of the near-infrared light spot can be adjusted by adjusting the plastic rod. Specifically, the plastic rod comprises an inner deformable metal rod and an outer rubber sleeve, which are consistent with the deformable rod material of the currently marketed cell phone holder, and are the prior art. The structure 2.2 is a height gauge which can be used as a height reference when adjusting the variable beam expanding system, and different heights can be adjusted according to different requirements in specific experiments.
An appearance diagram of a temperature control part of the automatic near-infrared laser variable beam expanding irradiation temperature control system is shown in fig. 6. Comprising a box 3.2. The top of the box body 3.2 comprises a near infrared laser irradiation sample placing area 3.1, and the sample placing area 3.1 can also be used as a reference area for adjusting the variable beam expanding system and the infrared temperature control probe. The side wall of the box body 3.2 is also provided with a power connecting wire input socket 3.3, a main power switch 3.4, a power connecting wire output socket 3.5, an adjusting knob 3.6, a display screen 3.7, an adjusting button 3.8 and an electrifying indicator lamp 3.9. The input socket of the power connecting wire is connected with a 220V alternating current power supply, and the output socket 3.5 of the power connecting wire is used for connecting the near infrared laser generating equipment. The adjusting knob 3.6 is used to adjust the screen contrast. The display screen 3.7 is used for displaying the real-time temperature and the set temperature. The adjustment buttons 3.8, four in total, respectively perform the "reset", "+ 0.1 ℃", "0.1 ℃", and "temperature upper/lower limit selection" functions. And the power-on indicator lamp 3.9 displays whether the power-on circuit of the near-infrared laser equipment is powered on. The singlechip programming can realize the functions, and the singlechip and other elements are connected as follows.
The automatic near-infrared laser variable beam expansion irradiation temperature control system is shown in a schematic diagram of fig. 7, which integrally describes working processes of all systems, the whole system uses 220V alternating current, 5V low voltage is generated after passing through a transformer, the low voltage supplies power to working elements such as a single chip microcomputer, a display, a sensor, a reset BUTTON and the like, the 220V alternating current supplies power to a near-infrared laser power-on circuit AT the same time, the single chip microcomputer is controlled by a reset BUTTON and receives temperature information transmitted by an infrared temperature sensor according to a set program, the single chip microcomputer controls a display screen to display corresponding temperature data according to a set program, an alarm prompt sound is given when the temperature is too high or too low, the single chip microcomputer controls the near-infrared power-on circuit to be on and off, the circuit implementation diagram of a temperature measurement system in the specific automatic near-infrared laser variable beam expansion irradiation temperature control system is shown in fig. 8, which describes a feasible circuit design scheme for realizing a process of fig. 5, as shown in fig. 8, the embodiment uses a display screen 3.7 with model number of AT 3689C 51, the display screen 3.7 adopts output model of a 36L M L, the model 0, the model, the display screen is connected with a full-0, the full-specification is that a ttrp switch is connected with a ttrp switch, the full-0 is connected with a ttrp switching mode is respectively, the full-0, the.
In the using process of the temperature control system, after the design conditions and the programming meeting the conditions are met, the specific implementation process of the automatic near-infrared laser variable beam expanding irradiation temperature control system is as follows. The sample to be irradiated is placed in the sample placement area 3.1 and the interface of the near infrared laser fiber is connected to the joint 1.1. And adjusting the height of the beam expanding system and the angle of the infrared temperature control sensor according to the experimental requirements. Three lenses in the lens group are placed at three positions identified by the reference numeral 1.9, and then the first lens 1.2 and the third lens 1.4 are adjusted according to the diameter of the sample. The method for calculating the adjustment distance is based on optical calculation, and if the focal length of the first lens 1.2 is f1, the focal length of the second lens 1.3 is f2, the focal length of the third lens 1.4 is f3, the initial distance between the first lens 1.2 and the second lens 1.3 is e1, the initial distance between the second lens 1.3 and the third lens 1.4 is e2, the distance of the first lens 1.2 moving relative to the initial position is Δ d1, and the moving amount of the third lens 1.4 is Δ d2, the relation 1:
i.e. the third lens 1.4 as a compensation lens, the distance of movement deltad 2 is related to the distance of movement deltad 1 of the first lens 1.2. And finally, the integral beam expanding multiplying power of the beam expanding system meets the relation 2:
wherein β 2(Δ d1) satisfies the relation 3:
after the lens spacing relation is adjusted according to the relation, an external 220V power line is connected to a power supply connecting line input socket 3.3, a power supply of the near-infrared laser equipment is connected to a power supply connecting line output socket 3.5, a main power switch 3.4 is turned on, so that the whole circuit is kept in a connected state, a target temperature is set, firstly, a temperature upper limit/lower limit selection in an adjusting button 3.8 is clicked, a temperature to be changed is selected, then, a +0.1℃ in the adjusting button 3.8 is clicked according to needs to be adjusted, the temperature is increased or reduced by 0.1℃ after the button is pressed once, when the target temperature is lower than the set temperature, an electromagnetic relay switch R L is turned on, an indicator lamp 3.9 is turned on, a near-infrared laser power supply circuit is powered on, at the moment, a near-infrared laser spot with a proper size appears on a sample, if a light plate has a micro deviation or a temperature measurement inaccuracy plasticity rod appears, in the irradiating process, the temperature displayed on a display screen 3.7 begins to rise, when the temperature rises to be higher than the upper limit of the preset temperature, the near-infrared laser power supply circuit alarms, at the same time, the near-adjustable infrared laser switch R L is turned off, the near-adjustable infrared laser power-adjustable button, the near-infrared laser equipment can be automatically turned off, and the near-infrared laser irradiation process can.
Claims (12)
1. An automatic near-infrared laser variable beam expanding irradiation temperature control system is characterized by comprising a variable beam expanding system (1), an adjusting bracket (2) and a temperature control system (3),
the temperature control system (3) comprises a box body (3.2), a sample placing area (3.1) is arranged at the top of the box body (3.2), an adjusting support (2) is fixed at the edge of the box body, and a power connecting wire input socket (3.3), a main power switch (3.4), a power connecting wire output socket (3.5), an adjusting knob (3.6), a display screen (3.7), an adjusting button (3.8) and an indicating lamp (3.9) are further arranged on the side wall of the box body (3.2);
the adjusting bracket (2) comprises a vertically arranged telescopic rod (2.1), and the top of the telescopic rod (2.1) is connected with the variable beam expanding system (1) positioned above the box body (3.2) through an adjusting rod (2.1.2); a scale (2.2) parallel to the telescopic rod (2.1) is arranged at the top of the temperature control system (3);
the variable beam expanding system (1) comprises a lens cone (1.5), and two ends of the adjusting rod (2.1.2) are respectively fixed with the top of the telescopic rod (2.1) and the outer wall of the lens cone (1.5); a first lens (1.2), a second lens (1.3) and a third lens (1.4) are sequentially arranged in the lens barrel (1.5) from top to bottom, the first lens (1.2) and the third lens (1.4) are concave lenses, the second lens (1.3) is a convex lens, the lens barrel (1.5) is bottomless, and an interface (1.1) is arranged at the top of the lens barrel; the lower part of the lens barrel (1.5) is provided with an infrared thermal sensing device (1.8), the infrared thermal sensing device (1.8) comprises a probe (1.8.1) and a rotary adjusting device (1.8.2), and the probe (1.8.1) is connected below the lens barrel (1.5) through the rotary adjusting device (1.8.2).
2. The system according to claim 1, wherein the first lens (1.2), the second lens (1.3), and the third lens (1.4) are respectively fixed in the barrel (1.5) by a first fixing element (1.2.1), a second fixing element (1.3.1), and a third fixing element (1.4.1).
3. The automatic near-infrared laser variable beam expanding irradiation temperature control system according to claim 2, wherein the first fixing member (1.2.1), the second fixing member (1.3.1) and the third fixing member (1.4.1) are all screws; the side wall of the lens cone (1.5) is symmetrically provided with a pair of grooves (1.6) along the height direction, the tail end of each screw extends into the screw holes in the side walls of the first lens (1.2), the second lens (1.3) and the third lens (1.4) respectively for internal screw connection, and a rubber pad is arranged between the nut part of each screw and the outer wall of the lens cone (1.5).
4. The automatic temperature control system for near-infrared laser variable beam expanding irradiation according to claim 2, wherein a scale (1.7) is disposed on an outer wall of the lens barrel (1.5), three marks (1.9) are disposed on the lens barrel (1.5), and the marks (1.9) correspond to initial positions of the first fixing member (1.2.1), the second fixing member (1.3.1) and the third fixing member (1.4.1), respectively.
5. The automated near-infrared laser variable beam expanding irradiation temperature control system of claim 1, wherein the rotation adjusting means (1.8.2) comprises a first rod member, a second rod member and a hinge, the first rod member and the second rod member being connected by the hinge.
6. The system according to claim 1, wherein the bottom of the lens barrel (1.5) extends outward from the first rod, the rotation adjusting device (1.8.2) is a universal joint, and the probe (1.8.1) is connected to the first rod through the universal joint.
7. The automated near-infrared laser variable beam-expanding irradiation temperature control system according to claim 1, characterized in that the telescopic rod (2.1) comprises an upper part and a lower part, the lower part is a hollow cylindrical shell and the lower part is thicker than the upper part, the upper part can be retracted in the lower part; the upper part and the lower part are fixed by a fastener (2.1.1); the adjusting rod (2.1.2) is a plastic rod.
8. The automated near-infrared laser variable beam-expanding irradiation temperature control system according to claim 7, wherein the fastening member (2.1.1) is a bolt, the upper portion is provided with a plurality of holes in the height direction, the top of the lower side wall is provided with a fixing hole, and when the temperature control system is fixed, a certain hole of the upper portion and the fixing hole of the lower portion are aligned and then the bolt is inserted for fixing.
9. The automated near-infrared laser variable beam-expanding irradiation temperature control system according to claim 1, wherein the number of the adjustment buttons (3.8) is four, and the adjustment buttons are respectively a reset button, a +0.1 ℃ button, a-0.1 ℃ button and a temperature upper/lower limit selection button.
10. The automatic temperature control method for variable beam expanding irradiation of near-infrared laser is characterized by comprising the following steps of:
s1: the program is pre-written into the singlechip and connected with the circuit;
s2: a sample to be irradiated is placed in a sample placing area (3.1) at the top of a box body (3.2), an interface of a near-infrared laser fiber is connected to a joint (1.1), and the height of a beam expanding system and the angle of an infrared temperature control sensor are adjusted according to experiment requirements;
s3: placing three lenses in the lens group at three positions identified by the mark (1.9), and then adjusting the first lens (1.2) and the third lens (1.4) according to the diameter of the sample;
s4: setting a target temperature and switching on a circuit;
and S5, when the temperature gradually rises until the temperature is higher than the preset target temperature, the circuit buzzer alarms, the electromagnetic relay switch is closed, the near-infrared laser power supply circuit is disconnected, and the near-infrared laser irradiation is finished.
11. The method of claim 10, wherein in step S3, the focal length of the first lens (1.2) is f1, the focal length of the second lens (1.3) is f2, the focal length of the third lens (1.4) is f3, the initial distance between the first lens (1.2) and the second lens (1.3) is e1, the initial distance between the second lens (1.3) and the third lens (1.4) is e2, the distance that the first lens (1.2) moves relative to the initial position is Δ d1, and the distance that the third lens (1.4) moves is Δ d2, which satisfy the following relations:
and finally, the integral beam expanding multiplying power of the beam expanding system meets the following relational expression:
wherein β 2(Δ d1) satisfies the following relation:
12. the method of claim 10, wherein the step of setting the target temperature in step S4 comprises: firstly clicking ' temperature upper/lower limit selection ' in an adjusting button (3.8), selecting the temperature to be changed, then clicking +0.1℃ ' and ' -0.1℃ ' in the adjusting button (3.8) as required to adjust, and increasing or decreasing the temperature by 0.1 ℃ every time the adjusting button is pressed until the target temperature value is reached.
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