CN102589736A - Detection method and detection system for metal powder laser rapidly-molded temperature field - Google Patents
Detection method and detection system for metal powder laser rapidly-molded temperature field Download PDFInfo
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Abstract
The invention provides a detection method of a metal powder laser rapidly-molded temperature field, belonging to the technical field of temperature field detection. The detection method comprises the following steps: pre-arranging a plurality of through holes and blind holes for containing high-temperature thermoelectric couples at different positions of a molded base plate; simultaneously detecting temperature and comparing according to the through holes and the blind holes, so as to obtain a specific principle of a difference between the temperature fields in a molded work piece and the base plate in a laser rapidly-molding process; and obtaining the temperature field in the molded work piece through a blind hole temperature measuring method. A temperature detection system is not easy to influence by an external machining process so that the measurement precision is ensured. A more accurate temperature field distribution is obtained through optimally arranging temperature measuring points. The advantages of direct temperature measurement and indirect temperature measurement are integrated and the thermoelectric couples in the blind holes are not directly contacted with the molded work piece and can be repeatedly used, so that the cost is saved. Through a plurality of times of experiments, a difference rule of the temperature fields in the molded work piece and the base plate is obtained; and the quantity of the thermoelectric couples in the through holes is gradually reduced and the cost is reduced. The stability of temperature measurement software is higher, the expandability is good and the function is strong.
Description
Technical field
The present invention relates to metal powder laser RP technique and temperature field detection technique, be specially a kind of detection method and detection system of metal powder laser quick shaping temperature field of, blind hole thermometric logical based on thermopair.
Background technology
The direct RP technique of laser metal is an advanced manufacturing technology that on the rapid prototyping technology basis that occurs the latter stage eighties, combines synchronous coaxial feeding laser melting and coating technique to grow up.It relates to the gordian technique in fields such as machinery, laser, computer-aided design (CAD), computer-aided manufacturing, computer numerical control (CNC), material science.It has broken through the limitation of traditional fast forming process and moulding material, be in the many methods of present quick shaping research at most, the most rising new manufacture.But in the metal parts laser fast forming was made, distortion that formation of parts often occurs and problems of crack were to hinder it to expand the biggest obstacle of using; The factor that causes these problems to occur is a lot, but basic reason is the temperature field skewness that the laser beam spot heating is caused, and causes at formation of parts to have the stress concentration phenomenon, and then causes strain cracking.Therefore; Disclosing forming process temperature field evolution rule is prerequisite and the basis of optimizing technological parameter, regulating and controlling temperature field distribution, reducing stress concentration and improve forming quality, is the necessary means that discloses forming process temperature field evolution rule and forming process temperature field efficient real time is detected.
Temp measuring method commonly used at present mainly contains two kinds: contact temperature-measuring and contactless temperature-measuring.The normal at present contactless temperature-measuring method that adopts based on infrared thermometer; But infrared thermometer receives the interference ratio of processing environment bigger, and involves great expense, and the more important thing is that it only can detect the bath temperature and the specimen surface temperature of forming process; Can't detect Forming Workpiece internal temperature field; But the field distribution of Forming Workpiece internal temperature is directly to influence the principal element that the formation of parts internal stress distributes, and therefore, the field distribution of Forming Workpiece internal temperature is the emphasis of temperature detection.
Thermocouple temperature measurement directly contacts Forming Workpiece, belongs to the direct temperature measurement method, and temperature survey is accurate, is to detect the important method that the interior temperature field distributes.In addition, owing to optimize in the technological parameter forming experiment, need a large amount of repeated temperature fields test experience at new material.And the direct contact workpiece thermometric of thermopair, it promptly is set in Forming Workpiece inside, belongs to once to consume and can not utilize again, has increased the detection cost.
Summary of the invention
To the technical matters of above-mentioned existence, the object of the invention is to provide the detection method and the detection system thereof in a kind of metal powder laser quick shaping temperature field, realizes accurately detecting with low-cost.
Technical scheme of the present invention is following:
The detection method in a kind of metal powder laser quick shaping of the present invention temperature field; Comprise: the through hole and the blind hole of preset several built-in pyrometer couples on the forming board diverse location; According to through hole and blind hole thermometric contrast simultaneously; Obtain the concrete rule of the inner and substrate internal temperature field difference of Forming Workpiece in the laser fast forming process, adopt the method for blind hole thermometric to obtain Forming Workpiece temperature inside field again.
The concrete rule of said laser fast forming process temperature field distribution; Confirm as follows: the temperature of measuring several through holes and the interior pyrometer couple of blind hole on the forming board diverse location simultaneously; Temperature measurement data through thermopair in same position blind hole and the through hole compares; Obtain the distribution situation and the variation tendency of the inner and substrate internal temperature field of Forming Workpiece under the different situations; Forming Workpiece inside and substrate internal temperature field are compared analysis, obtain the concrete rule of difference between the two.
Adopt the detection system of metal powder laser quick shaping temperature field detection method of the present invention; Comprise: the computing machine of a plurality of pyrometer couples, transition card, data acquisition module and built-in temp measuring system software in forming board through hole and the blind hole of being placed in; Thermopair is connected with data acquisition module, and data acquisition module through the conversion of signals card connection on computers.
Described thermopair places the through hole or the blind hole of forming board through its mounting structure, and its mounting structure comprises:
Substrate holder places the substrate below, and is fixed on the bracket base;
Bottom platen is positioned at substrate holder thermopair below, on each thermopair, is respectively installed with and the contacted spring of bottom platen, and bottom platen is provided with at least three and the contacted set screw of bracket base.
Blind hole and through hole that forming board described in the present invention is provided with, one group in twos, wherein the distance of the bottom of blind hole and upper surface of base plate is 0.1-2mm.The temperature-measuring range of said pyrometer couple is 0-1800 ℃, and the actual point for measuring temperature of thermopair is exposed outside.Described transition card changes the RS485 communication for the RS232 communication.
The concrete control flow of described temp measuring system software is:
Step 1): carry out the serial ports parameter configuration;
Step 2): carry out the setting of data sampling cycle, the sampling period is made as more than 1000 milliseconds;
Step 3): write the serial communication order, the communications protocol of employing is an ASCII command agreement, and promptly the input command form is an ASCII fromat;
Step 4): the temperature data of reading system data buffer, the said data layout that reads is a character string forms;
Step 5): the string data to reading in the step 4) is carried out Data Format Transform;
Step 6): temperature data is removed the processing of making an uproar;
Step 7): temperature data is carried out Filtering Processing, and filtering mode is the pointwise medium filtering;
Step 8): carry out the real-time demonstration of temperature curve; Carry out the setting of high low-temperature warning link simultaneously;
Step 9): temperature data is written among the Microsoft Excel.
The present invention has following advantage:
1. simple in structure, practice thrift cost.The thermocouple temperature measurement system is not vulnerable to the influence of extraneous processing environment in the detection method that the present invention proposes, and can guarantee measuring accuracy; Secondly the thermocouple measurement system price is cheap, can obtain genuine and believable temperature field data with lower cost.
2. but point for measuring temperature preferred arrangement.The present invention can be according to the concrete shape and the actual processing experience of formation of parts; Position and be prone to the deform position of ftractureing complicated at the shaping track are provided with point for measuring temperature more; The finer temperature field that can obtain the emphasis sensitive part like this distributes, and for finding the method that suppresses strain cracking theoretical foundation is provided.
3. the advantage of integrated direct temperature measurement and indirect temperature-measuring.The present invention adopts the scheme of logical blind hole thermopair contrast thermometric, and thermopair directly contacts Forming Workpiece in the through hole, belongs to the direct temperature measurement means, and temperature survey is accurate; And the thermopair in the blind hole does not directly contact Forming Workpiece, belongs to indirect temperature-measuring, and is reusable, practices thrift cost.Through repeatedly experiment, find the difference rule of Forming Workpiece inside and substrate temperature field, can reduce through hole temperature thermocouple quantity gradually, reduce cost.
4. system stability is higher, extensibility good, software function is powerful.The present invention has used RS232 changes the RS485 transition card, has remedied some shortcomings of RS-232-C interface, has improved the stability of data acquisition precision and temp measuring system.Can measure acquisition module, temp measuring system favorable expandability according to the coupling respective numbers of how much expanding of measurement point.The software Development instrument adopts popular in the world in recent years visual programming language-Labview, makes the thermometric software of native system have advantages such as man-machine interaction is good, powerful.This software has realized that temperature data measures, gathers and monitor processing in real time, has real time temperature curve display function, forming temperature data Microsoft Excel export function and high low temperature warning function, has satisfied the needs of practical application.
Description of drawings
Fig. 1 is the layout synoptic diagram of substrate point for measuring temperature of the present invention.
Fig. 2 is the A-A cross-sectional schematic of Fig. 1.
Fig. 3 is the mounting structure synoptic diagram of thermopair among the present invention.
Fig. 4 is a temp measuring system structured flowchart of the present invention.
Fig. 5 is the man-machine interface figure of temp measuring system software of the present invention.
Fig. 6 is a temp measuring system software control flow chart of the present invention.
Among the figure: 1. substrate, 2. through hole, 3. blind hole, 4. substrate holder, 5. thermopair, 6. spring, 7. bottom platen, 8. set screw, 9. bracket base.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Embodiment 1: temperature field detection method of the present invention; Be specially: the through hole 2 and blind hole 3 of preset several built-in pyrometer couples on forming board 1 diverse location; According to through hole 2 and blind hole 3 thermometric contrast simultaneously; Obtain the concrete rule of the inner and substrate 1 internal temperature field difference of Forming Workpiece in the laser fast forming process, adopt the method for blind hole 3 thermometrics to obtain Forming Workpiece temperature inside field again.
The concrete rule of said laser fast forming process temperature field distribution; Confirm as follows: measure on forming board 1 diverse location temperature of pyrometer couples 5 in several through holes 2 and blind hole 3 simultaneously; Compare through the temperature measurement data of same position blind hole 3 with through hole 2 interior thermopairs 5; Obtain the distribution situation and the variation tendency of the inner and substrate 1 internal temperature field of Forming Workpiece under the different situations; Forming Workpiece inside and substrate 1 internal temperature field are compared analysis, obtain the concrete rule of difference between the two.
Thermopair 5 in the said through hole 2 is directly measured the Forming Workpiece internal temperature, and temperature survey is accurate; Thermopair 5 in the blind hole 3 is measured substrate 1 internal temperature.Because the through hole temperature thermocouple directly contacts and is set in Forming Workpiece inside, belong to and once consume and to utilize again, and the blind hole temperature thermocouple can be realized reusing; And optimize in the technological parameter forming experiment at new material, need a large amount of repeated temperature fields test experience, adopt thermopair blind hole thermometric can reduce the quantity consumed of thermopair, reduce and measure cost.In conjunction with thermopair through hole thermometric and thermopair blind hole thermometric comparative analysis result, can guarantee the accuracy in thermopair blind hole thermometric reflection laser fast forming temperature field.
As shown in Figure 4; This routine described detection system comprises: the computing machine of a plurality of pyrometer couples 5, transition card, data acquisition module and built-in temp measuring system software in be placed in forming board through hole 2 and the blind hole 3; Thermopair 5 is connected with data acquisition module, and data acquisition module through the conversion of signals card connection on computers.
Described thermopair is selected the bigger platinum-rhodium alloy thermopair of temperature-measuring range for use; The common used in industry pyrometer couple all exists the long shortcoming (greater than 20s) of thermal response time; The present invention exposes processing to the actual point for measuring temperature of thermopair; Greatly improve the response speed (thermal response time is 1s) of thermopair, satisfied actual thermometric requirement.WRR-010, high temperature resistant 0-1800 ℃.Transition card adopts the RS232 communication to change the RS485 communication, remedies the defective that general microcomputer provides the RS-232-C interface of standard, has adopted this new interface standard of RS485 in the data acquisition link, has improved measuring accuracy and stability.The data acquisition module that adopts can according to measurement point how much expand the coupling respective numbers, each data acquisition module contains the thermopair load module of 8 passages, 24 sigma-delta ADC provide higher precision; Precision>0.1%, sampling rate >=10 HZ/ second, isolate 3000 VDC;, the input of 6 tunnel difference, 2 tunnel single-ended inputs; The thermocouple type that can insert has J, K, E, T, R, S, B etc., and built-in CJC is connected with thermopair, accomplishes the forming process temperature acquisition and measures.Computer-internal thermometric software has filtering, calibration link.
As shown in Figure 3, described thermopair 5 places the through hole 2 or the blind hole 3 of forming board 1 through its mounting structure, and its mounting structure comprises:
As shown in Figure 6, this routine said temp measuring system The software adopted Labview exploitation temp measuring system software mainly utilizes the VISA module among the Labview to carry out the serial communication programming, and signal transfer protocol adopts ASCII command agreement.This software has realized that the temperature data of metal powder laser quick shaping process measures, gathers and monitor processing in real time, has real-time forming temperature curve display function, forming temperature data Microsoft Excel export function and high low temperature warning function.Its concrete control flow is:
Step 1): carry out the serial ports parameter configuration; As: the serial port resource title is selected COM1; Baud rate is set to 9600Baud; Data bit-rate is set to 8 bps; PB is set to none;
Step 2): carry out the setting of data sampling cycle, the sampling period is made as more than 1000 milliseconds; Because data acquisition is the mode of scan round for the employing of 8 path thermocouple load modules, the scanning of each passage needs 125 milliseconds consuming time, so the employing cycle is made as more than 1000 milliseconds;
Step 3): write the serial communication order, the order that this example writes is that the log-on data acquisition module carries out temperature data acquisition, and the communications protocol of employing is an ASCII command agreement, and promptly the input command form is an ASCII fromat;
Step 4): the temperature data of reading system data buffer, the said data layout that reads is a character string forms;
Step 5): the string data to reading in the step 4) is carried out Data Format Transform: promptly read each in the character string successively, convert it into metric numeric format one by one;
Step 6): temperature data is removed the processing of making an uproar; Therefore the temperature-measuring range of thermopair is 0-1800 ℃, less than 0 ℃ with greater than 2000 ℃ temperature measurement data, thinks that noise data removes;
Step 7): temperature data is carried out Filtering Processing, and filtering mode is the pointwise medium filtering; The data structure of a stacking-type promptly is set, gathers 5 temperature datas at every turn, data are carried out the size ordering,, and then gather next group data the output of the data in the middle of coming;
Step 8): carry out the real-time demonstration of temperature curve, carry out the setting of high low-temperature warning link simultaneously; The temperature-measuring range of thermopair is 0-1800 ℃, therefore when real time temperature exceeds 1800 ℃, carries out high temperature alarm; And pyrometer couple temperature measurement accuracy when temperature is lower than 200 ℃ is not high, therefore when real time temperature is lower than 200 ℃, carries out low-temperature warning;
Step 9): temperature data is written among the Microsoft Excel; Be about to the octuple temperature data and be integrated into the array form, array is written among the Microsoft Excel, realized the Microsoft Excel output of temperature acquisition data.
The idiographic flow that adopts temp measuring method according to the invention and system and device to carry out detecting in metal powder laser quick shaping temperature field is following:
(1) the logical blind hole of point for measuring temperature preferred arrangement and preboring
Like Fig. 1, shown in Figure 2, arrange that on the laser beam scan path of forming board 1 point for measuring temperature and preboring are some to blind hole and through hole, blind hole 3 and one group in twos of through hole 2, wherein the distance of the bottom of blind hole 3 and upper surface of base plate is 1mm.Drilling hole amount and position can process experience according to reality; And according to the deform sensitivity of cracking of the concrete size shape of formation of parts and formation of parts different structure position; In the actual measurement process; Can also be optimized layout and boring to point for measuring temperature according to the concrete size shape of formation of parts.The position complicated at the shaping track is provided with point for measuring temperature more; Simultaneously according to actual processing experience; In the formation of parts cracked parts that is prone to deform the logical blind hole of point for measuring temperature and preboring is set, to obtain more accurate, the finer temperature field distribution results of Forming Workpiece strain cracking sensitive part more.
(2) thermopair is installed
As shown in Figure 3, thermopair 5 is inserted in each through hole 2 and the blind hole 3, through regulating the set screw 8 on the bottom platen 7, promote bottom platen 7 and vertically compress thermopair 5, to guarantee that thermopair 5 points for measuring temperature fit tightly substrate 1 in the blind hole 3.
(3) temperature field is detected
Start the temp measuring system software (the software human-computer interaction interface is as shown in Figure 5) of computing machine, laser fast forming process temperature field is detected in real time through data acquisition module control thermopair.As shown in Figure 6, be temp measuring system software control temperature detection idiographic flow;
(4) thermopair through hole and blind hole thermometric and temperature field comparative analysis simultaneously
Adopt thermopair through hole and blind hole while thermometric: the thermopairs in the through hole 2 directly contact with Forming Workpiece; What measure is the temperature variation of inner certain point of Forming Workpiece, and the temperature data of gathering each point for measuring temperature different time has just obtained interior temperature field distribution and evolution trend in the forming process; And the direct contact substrate 1 of thermopair in each blind hole 3, measurement be the temperature variation of forming board 1 inner certain point, gather each point for measuring temperature different time temperature data just obtained the regularity of distribution and the evolution trend of substrate 1 internal temperature field in the forming process; The temperature data of same position blind hole 3 and through hole 2 interior thermopairs is compared analysis, can obtain the temperature variations and concrete difference of Forming Workpiece internal temperature field and substrate 1 internal temperature field, and sum up concrete rule.
(5) thermopair blind hole thermometric and temperature field analysis
Optimize in the technological parameter forming experiment at new material, need a large amount of repeated temperature fields test experience, adopt thermopair blind hole temp measuring method, realize the thermopair repeated use, reduce and measure cost.In conjunction with thermopair through hole thermometric and thermopair blind hole thermometric comparative analysis result; With the anti-Forming Workpiece internal temperature field of releasing, the substrate internal temperature field of thermopair blind hole thermometric gained, also can accurately analyze shaping interior temperature field distribution and variation tendency.
Embodiment 2: this example is identical with embodiment 1 detection system structure and detection method, and different is: in blind hole 3 and through hole 2 that said forming board 1 is preset, one group in twos, wherein the distance of the bottom of blind hole 3 and substrate 1 upper surface is 2mm.
Embodiment 3: this example is identical with embodiment 1 detection system structure and detection method, and different is: in blind hole 3 and through hole 2 that said forming board 1 is preset, one group in twos, wherein the distance of the bottom of blind hole 3 and substrate 1 upper surface is 1mm.
Embodiment 4: this example is identical with embodiment 1 detection system structure and detection method, and different is: in blind hole 3 and through hole 2 that said forming board 1 is preset, one group in twos, wherein the distance of the bottom of blind hole 3 and substrate 1 upper surface is 0.5mm.
Embodiment 5: this example is identical with embodiment 1 detection system structure and detection method, and different is: in blind hole 3 and through hole 2 that said forming board 1 is preset, one group in twos, wherein the distance of the bottom of blind hole 3 and substrate 1 upper surface is 0.2mm.
Embodiment 6: this example is identical with embodiment 1 detection system structure and detection method, and different is: in blind hole 3 and through hole 2 that said forming board 1 is preset, one group in twos, wherein the distance of the bottom of blind hole 3 and substrate 1 upper surface is 0.8mm.
Embodiment 7: this example is identical with embodiment 1 detection system structure and detection method, and different is: in blind hole 3 and through hole 2 that said forming board 1 is preset, one group in twos, wherein the distance of the bottom of blind hole 3 and substrate 1 upper surface is 1.2mm.
Embodiment 8: this example is identical with embodiment 1 detection system structure and detection method, and different is: in blind hole 3 and through hole 2 that said forming board 1 is preset, one group in twos, wherein the distance of the bottom of blind hole 3 and substrate 1 upper surface is 1.5mm.
Claims (10)
1. the detection method in a metal powder laser quick shaping temperature field; It is characterized in that comprising: the through hole and the blind hole of preset several built-in pyrometer couples on the forming board diverse location; According to through hole and blind hole thermometric contrast simultaneously; Obtain the concrete rule of the inner and substrate internal temperature field difference of Forming Workpiece in the laser fast forming process, adopt the method for blind hole thermometric to obtain Forming Workpiece temperature inside field again.
2. according to the detection method in the described metal powder laser quick shaping of claim 1 temperature field; It is characterized in that: the concrete rule of said laser fast forming process temperature field distribution; Confirm as follows: the temperature of measuring several through holes and the interior pyrometer couple of blind hole on the forming board diverse location simultaneously; Temperature measurement data through thermopair in same position blind hole and the through hole compares; Obtain inner distribution situation and the variation tendency with substrate internal temperature field of Forming Workpiece under the different situations, Forming Workpiece inside and substrate internal temperature field are compared analysis, obtain the concrete rule of difference between the two.
3. according to the detection method in claim 1 or 2 described metal powder laser quick shaping temperature fields, it is characterized in that: blind hole and through hole that said forming board is provided with, one group in twos, wherein the distance of the bottom of blind hole and upper surface of base plate is 0.1-2mm.
4. according to the detection method in claim 1 or 2 described metal powder laser quick shaping temperature fields, it is characterized in that: the temperature-measuring range of said pyrometer couple is 0-1800 ℃, and the actual point for measuring temperature of thermopair is exposed outside.
5. adopt the detection system of metal powder laser quick shaping temperature field detection method as claimed in claim 1; It is characterized in that comprising: the computing machine of a plurality of pyrometer couples, transition card, data acquisition module and built-in temp measuring system software in forming board through hole and the blind hole of being placed in; Thermopair is connected with data acquisition module, and data acquisition module through the conversion of signals card connection on computers.
6. according to the detection system in the described metal powder laser quick shaping of claim 5 temperature field, it is characterized in that: described thermopair places the through hole or the blind hole of forming board through its mounting structure, and its mounting structure comprises:
Substrate holder places the substrate below, and is fixed on the bracket base;
Bottom platen is positioned at substrate holder thermopair below, on each thermopair, is respectively installed with and the contacted spring of bottom platen, and bottom platen is provided with at least three and the contacted set screw of bracket base.
7. according to the detection system in the described metal powder laser quick shaping of claim 5 temperature field, it is characterized in that: the actual point for measuring temperature of said thermopair is exposed outside.
8. according to the detection system in the described metal powder laser quick shaping of claim 5 temperature field, it is characterized in that: blind hole that is provided with on the said forming board and through hole, one group in twos, wherein the distance of the bottom of blind hole and upper surface of base plate is 0.1-2mm.
9. according to the detection system in the described metal powder laser quick shaping of claim 5 temperature field, it is characterized in that: described transition card changes the RS485 communication for the RS232 communication.
10. according to the detection system in the described metal powder laser quick shaping of claim 5 temperature field, it is characterized in that: the concrete control flow of described temp measuring system software is:
Step 1): carry out the serial ports parameter configuration;
Step 2): carry out the setting of data sampling cycle, the sampling period is made as more than 1000 milliseconds;
Step 3): write the serial communication order, the communications protocol of employing is an ASCII command agreement, and promptly the input command form is an ASCII fromat;
Step 4): the temperature data of reading system data buffer, the said data layout that reads is a character string forms;
Step 5): the string data to reading in the step 4) is carried out Data Format Transform;
Step 6): temperature data is removed the processing of making an uproar;
Step 7): temperature data is carried out Filtering Processing, and filtering mode is the pointwise medium filtering;
Step 8): carry out the real-time demonstration of temperature curve; Carry out the setting of high low-temperature warning link simultaneously;
Step 9): temperature data is written among the Microsoft Excel.
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| CN102794565A (en) * | 2012-09-04 | 2012-11-28 | 徐州工程学院 | LabView-based real-time monitoring system for laser cladding/laser re-melting process temperature field |
| CN105675161A (en) * | 2016-01-19 | 2016-06-15 | 河南理工大学 | Method for measuring temperature of laser processing workpiece via thermocouple |
| CN107290383A (en) * | 2017-08-03 | 2017-10-24 | 中国石油大学(北京) | A kind of experimental provision for describing thermo parameters method |
| CN107677387A (en) * | 2017-09-19 | 2018-02-09 | 合肥国轩高科动力能源有限公司 | Device and method for measuring laser temperature of Raman spectrometer |
| CN108593127A (en) * | 2018-06-28 | 2018-09-28 | 中国汽车工程研究院股份有限公司 | Thermocouple is layouted tool and points distributing method |
| CN110657892A (en) * | 2019-09-27 | 2020-01-07 | 北京航空航天大学 | Device and method for measuring surface temperature field of titanium alloy electric arc welding molten pool |
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| CN102794565A (en) * | 2012-09-04 | 2012-11-28 | 徐州工程学院 | LabView-based real-time monitoring system for laser cladding/laser re-melting process temperature field |
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| CN107677387B (en) * | 2017-09-19 | 2020-05-26 | 合肥国轩高科动力能源有限公司 | Device and method for measuring laser temperature of Raman spectrometer |
| CN108593127A (en) * | 2018-06-28 | 2018-09-28 | 中国汽车工程研究院股份有限公司 | Thermocouple is layouted tool and points distributing method |
| CN108593127B (en) * | 2018-06-28 | 2023-07-28 | 中国汽车工程研究院股份有限公司 | Thermocouple point distribution tool and point distribution method |
| CN110657892A (en) * | 2019-09-27 | 2020-01-07 | 北京航空航天大学 | Device and method for measuring surface temperature field of titanium alloy electric arc welding molten pool |
| CN112743222A (en) * | 2020-12-28 | 2021-05-04 | 江苏科技大学 | Method for rapidly measuring temperature of friction stir welding weld core area |
| CN112743222B (en) * | 2020-12-28 | 2024-01-23 | 江苏科技大学 | Rapid temperature measuring method for friction stir welding weld joint core area |
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