CN107300479B - Test platform for SVG heat pipe radiator characteristics and application method thereof - Google Patents
Test platform for SVG heat pipe radiator characteristics and application method thereof Download PDFInfo
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Abstract
The invention discloses a test platform for the characteristics of SVG heat pipe radiators and an application method thereof, wherein the test platform comprises a constant temperature air duct, a wind tunnel, a control unit and a controllable voltage stabilizing unit, the constant temperature air duct and the wind tunnel are mutually connected in a sealing way, a constant temperature device and a temperature measuring module are arranged on the constant temperature air duct, a heating and temperature measuring module is arranged on the constant temperature air duct at the position of a region where the heat pipe radiator to be tested is arranged, a controllable fan is arranged at an air inlet of the wind tunnel, a rectifying plate and an air quantity measuring module are arranged in the wind tunnel, a control end of a heating element of the heating and temperature measuring module and a control end of the constant temperature device are connected with the control unit through the controllable voltage stabilizing unit, and a control end of the controllable fan is connected with the control unit; the application method is to realize the linkage closed-loop control of the controllable fan and the heating and temperature measuring module. The invention can realize the high-precision test of the SVG heat pipe radiator characteristic and acquire the time high-precision response characteristic test result of the SVG heat pipe radiator.
Description
Technical Field
The invention relates to an electrical engineering technology, in particular to a test platform for SVG heat pipe radiator characteristics and an application method thereof.
Background
At present, a water cooling type heat dissipation mode is adopted for the SVG with large capacity, and a water cooling system has potential safety hazard for the normal operation of the SVG. Forced air cooling is an ideal cooling mode for large-capacity SVG. In a forced air cooling system, a heat pipe radiator is a core part in a heat dissipation system. The mode has high heat dissipation efficiency and good reliability, and is safer to normal operation of SVG. For high-power SVG, the heating power is high in normal operation, sudden faults or abrupt changes of loads are very easy to cause the rapid rise of the heating value of the power module, so that whether a large amount of heat in the SVG can be timely dissipated or not, and severe requirements are put forward on the heat dissipation performance of the heat pipe radiator. In the actual heat pipe heat radiation performance test, due to the long test time and the large number of radiators, the test environments of the radiators in different batches are different, and after the environmental temperature is 1-3 ℃, the judgment of the test personnel on the heat pipe radiator performance can be affected. In addition, in the testing process, the temperature measuring point on the substrate of the heat pipe radiator is measured, and the highest temperature occurrence point of the heat pipe radiator can not necessarily occur at the same position due to different manufacturing processes. The design of the current heat pipe radiator test platform rarely considers the factor.
The test platform for the dynamic performance of the heat pipe is partially researched by a small number of universities and scientific research units at home and abroad, and the test platform for the performance of the heat pipe is mainly composed of a constant temperature air duct, a wind tunnel, an adjustable fan and a measuring module, but the test platform has the following defects: 1) There is no device for precisely controlling the temperature of the air inlet in the air duct; 2) The control structure for rapidly and accurately controlling the heat and the air quantity received by the radiator is not provided; 3) In the conventional test, since the heat generating module is attached to the heat sink substrate, most of the test platforms do not have temperature measuring points between the heat generating module and the substrate, so the measured temperature is not necessarily the highest temperature point on the substrate, and even if a few test platforms have temperature measuring points between the heat generating module and the substrate, the number of temperature measuring points is often small, and it is not possible to objectively reflect whether the points are the highest temperature points. Therefore, a high-precision automatic control test platform capable of controlling the air inlet temperature in the air duct and measuring the highest temperature point on the radiator substrate needs to be designed.
Disclosure of Invention
The invention aims to solve the technical problems: aiming at the problems in the prior art, the test platform for the characteristics of the SVG heat pipe radiator and the application method thereof are provided, wherein the test platform for the characteristics of the SVG heat pipe radiator comprises a constant temperature air duct, a wind tunnel, a control unit and a controllable voltage stabilizing unit, and the high-precision test of the SVG heat pipe radiator can be realized by combining the structure of dual temperature detection and heating of a constant temperature device and a temperature measuring module of the constant temperature air duct, the structure design of a heating and temperature measuring module and a controllable fan and combining the air quantity measuring module with the structure design of the controllable fan.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a test platform of SVG heat pipe radiator characteristic, includes constant temperature wind channel, wind tunnel, control unit and controllable steady voltage unit, constant temperature wind channel, wind tunnel sealing connection each other, be equipped with constant temperature equipment and temperature measurement module on the constant temperature wind channel, just be located the regional department that places the heat pipe radiator that awaits measuring on the constant temperature wind channel and be equipped with heating and temperature measurement module, heating and temperature measurement module include heating element and temperature measurement element, the air intake of wind tunnel is equipped with controllable fan, be equipped with rectifying plate and amount of wind measurement module in the wind tunnel, heating and temperature measurement module's temperature measurement element output, amount of wind measurement module's output link to each other with control unit's input respectively, heating and temperature measurement module's heating element control end, constant temperature equipment's control end link to each other through controllable steady voltage unit and control unit's control output, controllable fan's control end links to each other with control unit's control output.
Preferably, the area of the constant temperature air duct, which is used for placing the heat pipe radiator to be tested, is a structure formed by three metal plates, the cross section of which is in a shape like a Chinese character kou, one side of the structure is provided with an opening, the opening on one side of the structure is provided with a substrate used for placing the heat pipe radiator to be tested, and the heating part of the heating and temperature measuring module is arranged on the outer side of the substrate.
Preferably, the surface of the heating and temperature measuring module is provided with a plurality of temperature measuring holes which are arranged in an array shape, and the temperature measuring elements of the heating and temperature measuring module are respectively arranged at the bottoms of the temperature measuring holes.
Preferably, the air quantity metering module is arranged between the rectifying plates.
Preferably, the controllable voltage stabilizing unit comprises a first controllable voltage stabilizing source and a second controllable voltage stabilizing source, the temperature control end of the heating and temperature measuring module is connected with the control output end of the control unit through the first controllable voltage stabilizing source, and the temperature control end of the constant temperature device is connected with the control output end of the control unit through the second controllable voltage stabilizing source.
Preferably, the control unit comprises an upper computer, a lower computer, a frequency converter and a DC/DC controller, wherein the lower computer is respectively connected with the upper computer, the frequency converter and the DC/DC controller, the output end of the frequency converter is connected with the control end of the controllable fan, and the output end of the DC/DC controller is respectively connected with the control ends of the first controllable voltage stabilizing source and the second controllable voltage stabilizing source.
Preferably, the control unit further comprises an ambient temperature sensor, and the output end of the ambient temperature sensor is connected with the lower computer.
Further, the invention also provides an application method of the test platform for the characteristics of the SVG heat pipe radiator, which comprises the following implementation steps:
1) The control unit pre-controls the voltage of the heating element output to the heating and temperature measuring module by the controllable voltage stabilizing source to be the initial voltage U 0 So that the controlled heat source is at the initial voltage U 0 The SVG heat pipe radiator to be tested is heated by the corresponding output power, and the control unit records the initial temperature T after the temperature is stable through the temperature output by the temperature measuring element of the heating and temperature measuring module 0 The method comprises the steps of carrying out a first treatment on the surface of the The addition ofThe temperature output by the temperature measuring elements of the heating and temperature measuring module specifically refers to the temperature which takes the maximum value of the temperatures output by the temperature measuring elements of the heating and temperature measuring module as the final output temperature;
2) Detecting the temperature of the constant-temperature air channel through the temperature measuring module, and if the temperature of the constant-temperature air channel is lower than a preset threshold value, exiting; otherwise, jumping to execute the next step;
3) The control unit increases the voltage output by the controllable voltage stabilizing source to the heating element of the heating and temperature measuring module through the PI regulator until the output voltage is equal to the preset first test voltage U 1 Recording the temperature output by the temperature measuring element of the heating and temperature measuring module as a first test temperature T 1 Generating a first test temperature T 1 Outputting and jumping to execute the step 3);
4) The control unit detects the rotating speed of the controllable fan and the initial rotating speed of the controllable fan is v 0 The control unit increases the rotating speed of the controllable fan through the PI regulator until the temperature output by the temperature measuring element of the heating and temperature measuring module is equal to the initial temperature T 0 The first rotation speed v of the controllable fan 20 during the test is recorded 1 Generates a first rotation speed v 1 And outputting the time change curve of (2);
5) The temperature output by the temperature measuring element of the heating and temperature measuring module is equal to the initial temperature T 0 As a control target, the control unit reduces the voltage output by the controllable voltage stabilizing source to the heating element of the heating and temperature measuring module through the PI regulator, and reduces the rotating speed of the controllable fan through the PI regulator until the rotating speed of the controllable fan is recovered to the initial rotating speed v 0 And the voltage output by the controllable voltage stabilizing source to the heating element of the heating and temperature measuring module is reduced to the initial voltage U 0 Recording the test actual measurement voltage U of the heating element of the heating and temperature measuring module output by the controllable voltage stabilizing source in the test process 2 Second rotating speed v of controllable fan in test process 2 Generating a test actual measurement voltage U 2 Second rotational speed v 2 And outputting the time change curves of the two.
The test platform for the characteristics of the SVG heat pipe radiator has the following advantages:
1. according to the test platform for the characteristics of the SVG heat pipe radiator, through the constant temperature device and the temperature measuring module of the constant temperature air duct and the dual temperature detection and heating structure of the heating and temperature measuring module, the structural design of the air quantity measuring module and the controllable fan is combined, basic hardware is provided for high-precision test of the characteristics of the SVG heat pipe radiator, the heat quantity of a heat source can be accurately measured and controlled, the rotating speed of the fan and the temperature in the constant temperature air duct can be accurately measured and controlled, and therefore accurate simulation of the test environment of the heat pipe radiator can be realized, and the test platform has the advantages of high test precision and simple structure.
2. The test platform for the characteristics of the SVG heat pipe radiator can be suitable for testing the characteristics of various SVG heat pipe radiators, and has the advantage of good universality.
The application method of the test platform for the SVG heat pipe radiator characteristics has the following advantages: the application method of the test platform for SVG heat pipe radiator characteristics can realize high-precision test of SVG heat pipe radiator by combining multiple steps and multiple closed-loop control on the basis of the basic hardware of the test platform for SVG heat pipe radiator characteristics, obtain time high-precision response characteristics of SVG heat pipe radiator, and obtain the first test temperature T of single controlled heat source heating test by the application method of the test platform for SVG heat pipe radiator dynamic characteristics 1 A first rotational speed v of a single-controlled fan acceleration test 1 Time change curve of (a), test actual measurement voltage U of controlled heat source and controlled fan linkage test 2 Second rotational speed v 2 The time change curves of the two can be used for rapidly and effectively measuring the performance quality of the heat pipe radiator to be measured.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional structure of a constant temperature air duct in an area where a heat pipe radiator to be tested is placed according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a curve obtained in an embodiment of the present invention.
Legend description: 1. a constant temperature air duct; 11. a thermostat device; 12. a temperature measurement module; 13. a temperature measurement module; 131. a temperature measuring hole; 14. a substrate; 2. wind tunnel; 20. a controllable fan; 21. a rectifying plate; 22. the air quantity metering module; 3. a control unit; 31. an upper computer; 32. a lower computer; 33. a frequency converter; 34. a DC/DC controller; 4. a controllable voltage stabilizing unit; 41. a first controllable voltage stabilizing source; 42. and a second controllable voltage stabilizing source.
Detailed Description
As shown in fig. 1, the test platform for the characteristics of the SVG heat pipe radiator in this embodiment includes a constant temperature air duct 1, a wind tunnel 2, a control unit 3 and a controllable voltage stabilizing unit 4, where the constant temperature air duct 1 and the wind tunnel 2 are connected in a sealing manner, the constant temperature air duct 1 is provided with a constant temperature device 11 and a temperature measuring module 12, the constant temperature air duct 1 is provided with a heating and temperature measuring module 13 at a region where the heat pipe radiator to be tested is placed, the heating and temperature measuring module 13 includes a heating element and a temperature measuring element, the wind tunnel 2 is provided with a controllable fan 20, the wind tunnel 2 is internally provided with a rectifying plate 21 and an air volume metering module 22, the output end of the temperature measuring module 12, the output end of the temperature measuring element of the heating and temperature measuring module 13 and the output end of the air volume metering module 22 are respectively connected with the input end of the control unit 3, and the control end of the heating element of the heating and temperature measuring module 13 and the control end of the constant temperature device 11 are connected with the control output end of the control unit 3 through the controllable voltage stabilizing unit 4 and the control unit 3, and the control end of the controllable fan 20 is connected with the control output end of the control unit 3. The testing platform of the characteristics of the SVG heat pipe radiator of the embodiment can realize constant temperature processing at the air inlet of the heat pipe radiator, the maximum power of the heating and temperature measuring module 13 is not lower than 6kW, the maximum temperature on the heat pipe radiator can be reflected, and the rotating speed of the controllable fan 20 can be controlled in a closed-loop linkage mode according to the measured air quantity. When needed, the control of the rotation speed of the controllable fan 20 can be adjusted by an experimenter through an upper computer.
As shown in fig. 1, the constant temperature air duct 1 in the present embodiment includes two constant temperature devices 11, and the two constant temperature devices 11 are respectively disposed on the left and right sides of the constant temperature air duct 1 to ensure uniform heating of the constant temperature air duct 1, so as to improve the constant temperature characteristics.
As shown in fig. 2, the area of the constant temperature air duct 1 where the heat pipe radiator to be measured is placed is in a structure formed by three metal plates, the cross section of which is in a shape like a Chinese character kou, and one side of the structure is provided with an opening, a substrate 14 for placing the heat pipe radiator to be measured is arranged at the opening of one side, and a heating component of the heating and temperature measuring module 13 is arranged outside the substrate 14. The object shown by the two-dot chain line in fig. 2 is the heat pipe radiator to be tested. The region for placing the heat pipe radiator to be tested is located at the air inlet of the constant temperature air duct 1, the heating and temperature measuring module 13 is arranged on the outer side of the substrate 14, and the constant temperature device 11 is installed on the outer side of the constant temperature air duct 1 to adjust the temperature in the constant temperature air duct, so that the temperature in the constant temperature air duct 1 can be quickly and efficiently adjusted.
In this embodiment, in order to further improve the heat conduction effect, a heat-conducting silica gel is coated between the heating and temperature measuring module 13 and the substrate 14 to ensure good heat conduction between the heating and temperature measuring module 13 and the substrate 14.
As shown in fig. 2, the surface of the heating and temperature measuring module 13 is provided with a plurality of temperature measuring holes 131 arranged in an array, and the temperature measuring elements of the heating and temperature measuring module 13 are respectively arranged at the bottoms of the temperature measuring holes 131, so that the temperature measuring elements can be close to the heating elements of the heating and temperature measuring module 13 as much as possible on one hand to improve the accuracy of temperature detection, and on the other hand, the overhaul of the temperature measuring elements of the heating and temperature measuring module 13 is also facilitated, and the temperature measuring elements of the heating and temperature measuring module 13 are positioned at the bottoms of the temperature measuring holes 131 to avoid the interference of the environmental temperature to the temperature measuring elements as much as possible on the premise of facilitating the overhaul. By arranging the plurality of temperature measuring holes 131 in an array shape and the temperature measuring elements arranged at the bottoms of the temperature measuring holes 131, the array-shaped temperature sensor is formed, and the accuracy of temperature detection can be effectively improved. In this embodiment, 15 temperature measuring holes 131 are provided on the surface of the heating and temperature measuring module 13, the 15 temperature measuring holes 131 are arranged in a 3×5 manner, each hole is circular, and a temperature thermocouple (a temperature measuring element of the heating and temperature measuring module 13) is disposed in the temperature measuring hole 131 near the substrate 14. The temperature measuring element of the heating and temperature measuring module 13 feeds back signals of all temperature measuring points to the control unit 3 so as to carry out closed-loop control on the heating value of the heating element of the heating and temperature measuring module 13 and display and output the highest temperature. In this embodiment, the temperature measuring elements of the heating and temperature measuring modules 13 obtain the detected temperature according to the method of taking the maximum value by the multipoint test, and feed back the detected temperature to the control unit 3. Of course, the shape and number of the temperature measuring holes 131 can be adjusted as needed.
One of the key technical problems to be solved by the testing platform for the characteristics of the SVG heat pipe radiator of the present embodiment is to realize high-precision temperature detection of a region where the heat pipe radiator to be tested is placed, and in order to achieve the above-mentioned objective, the following technical means are adopted: (1) A temperature measuring hole 131 is adopted to place a temperature measuring element of the heating and temperature measuring module 13 in a hole type structure; (2) A plurality of temperature measuring elements arranged in an array in the temperature measuring hole 131 are adopted for measuring temperature; (3) A thermally conductive silicone is applied between the heating and temperature measuring module 13 and the substrate 14 to ensure good thermal conductivity between the heating and temperature measuring module 13 and the substrate 14.
As shown in fig. 1, in this embodiment, two groups of rectifying plates 21 are disposed in the wind tunnel 2 and are parallel to each other in the wind tunnel 2, so that the air volume in the constant temperature wind tunnel 1 is uniform; the air quantity metering modules 22 are arranged between the rectifying plates 21, and the accuracy of air quantity detection can be prevented from being influenced by turbulent flow formed at the air quantity metering modules 22 in the wind tunnel 2 through the structure.
In this embodiment, the controllable voltage stabilizing unit 4 includes a first controllable voltage stabilizing source 41 and a second controllable voltage stabilizing source 42, the temperature control end of the heating and temperature measuring module 13 is connected to the control output end of the control unit 3 through the first controllable voltage stabilizing source 41, the first controllable voltage stabilizing source 41 can generate a steady voltage signal, and adjust the voltage output to the temperature control end of the heating and temperature measuring module 13, so as to adjust the heating power of the heating element of the heating and temperature measuring module 13, and meanwhile, the output voltage value and the current value of the first controllable voltage stabilizing source 41 are fed back to the control unit 3, so that the speed of the controllable voltage stabilizing source adjustment is accelerated and the output voltage precision of the controllable voltage stabilizing source is improved through closed loop control; the temperature control end of the thermostat 11 is connected with the control output end of the control unit 3 through a second controllable voltage stabilizing source 42, and the voltage output to the thermostat 11 can be adjusted through the second controllable voltage stabilizing source 42, so that the heating power of the thermostat 11 can be adjusted. Besides the form of the dual independent voltage stabilizing sources in the embodiment, the controllable voltage stabilizing sources with multiple independent output ends can be adopted as required, and the principle is the same as that of the embodiment, so that the description is omitted here.
In this embodiment, the control unit 3 includes an upper computer 31, a lower computer 32, a frequency converter 33 and a DC/DC controller 34, the lower computer 32 is respectively connected with the upper computer 31, the frequency converter 33 and the DC/DC controller 34, the output end of the frequency converter 33 is connected with the control end of the controllable fan 20, and the output end of the DC/DC controller 34 is respectively connected with the control ends of the first controllable voltage stabilizing source 41 and the second controllable voltage stabilizing source 42.
In this embodiment, the first controllable voltage stabilizing source 41 is composed of a chopper circuit structure, the output voltage is 0-450 v, the output current is 0-200 a, the duty ratio is controlled by the DC/DC controller 34, the temperature measuring component in the heating and temperature measuring module 13 is a thermocouple, the measured temperature is fed back to the lower computer 32, and then the output of the DC/DC controller 34 is controlled by the lower computer 31 in a closed loop manner according to the fed-back data. In this embodiment, the second controllable voltage stabilizing source 42 is composed of a chopper circuit structure, the output voltage is 0-250 v, the output current is 0-400 a, and the duty ratio is controlled by the DC/DC controller 34. The rotation speed of the controllable fan 20 is controlled by a frequency converter 33, and the output frequency of the frequency converter 33 is controlled by a lower computer 32.
The control loop of the first controllable voltage stabilizing source 41 is connected to the controllable DC/DC controller 34 in the controlled platform, and exchanges its output voltage and current data with the lower computer 32, and the temperature measuring module 12, the heating and temperature measuring module 13, and the air volume metering module 22 exchange temperature and air volume data with the control unit 3, respectively. The lower computer 32 is respectively connected with the DC/DC controller 34 and the control loop of the frequency converter 33, and receives and processes the data exchanged by the temperature measuring module 12, the heating and temperature measuring module 13, the air quantity measuring module 22 and the controllable fan 20, the lower computer 32 controls the duty ratio of the DC/DC controller 34 and the output frequency of the frequency converter 33, and the upper computer 31 directly controls the lower computer 32. The data of the temperature measuring module 12, the heating and temperature measuring module 13, the air quantity measuring module 22 and the controllable fan 20 are exchanged to the control unit 3, processed by the lower computer 32 and uploaded to the upper computer 31. The upper computer 31 can display and monitor the temperature and the air quantity parameters in the test platform in real time, and the wind speed of the controllable fan 20 and the output heat power of the heating and temperature measuring module 13 can be automatically controlled through the control unit 3, and can also be independently controlled manually by a tester through the upper computer 31: when the thermal power generated by the heating and temperature measuring module 13 changes, the control unit 3 can automatically adjust the rotation speed of the controllable fan 20 according to the preset program and the fed-back voltage signal in the lower computer 32 through the operation of the experimenter, and can also be decoupled by the experimenter to manually adjust the rotation speed of the controllable fan 20. When the control unit 3 automatically adjusts the rotating speed of the controllable fan 20, the rotating speed of the controllable fan 20 is adjusted in a closed loop mode according to the values fed back by the air quantity metering module 22 and the temperature measuring module 12. When the rotation speed of the controllable fan 20 is changed, the control platform can automatically adjust the heating power of the heating and temperature measuring module 13 according to a preset program in the lower computer 32 and a feedback rotation speed signal through the operation of a tester, and can also be decoupled by the tester to manually adjust the heating power of the heating and temperature measuring module 13. In this embodiment, the control unit 3 further includes an ambient temperature sensor 35, and an output end of the ambient temperature sensor 35 is connected to the lower computer 32, so that the ambient temperature can be detected by the ambient temperature sensor 35, and thus the ambient temperature information can be conveniently checked on the upper computer 31.
In order to improve the accuracy of the operation of the heating element of the heating and temperature measuring module 13 and the rotation speed control of the controllable fan 20 so as to realize the high-accuracy performance test of the heat pipe radiator, in this embodiment, a linkage closed-loop control mode of the heating and temperature measuring module 13 and the controllable fan 20 is adopted, and the specific implementation steps include:
1) The control unit 3 controls the voltage of the heating element output by the controllable voltage stabilizing source 4 to the heating and temperature measuring module 13 to be the initial voltage U in advance 0 So that the controlled heat source 13 is at the initial voltage U 0 The SVG heat pipe radiator to be tested is heated by the corresponding output power, and the control unit 3 records the initial temperature T after the temperature is stabilized by the temperature output by the temperature measuring element of the heating and temperature measuring module 13 0 The method comprises the steps of carrying out a first treatment on the surface of the The temperature output by the temperature measuring element of the heating and temperature measuring module 13 specifically refers to the temperature that takes the maximum value of the temperatures output by the temperature measuring elements of the heating and temperature measuring module 13 as the final output temperature;
2) Detecting the temperature of the constant-temperature air duct 1 through the temperature measuring module 12, and if the temperature of the constant-temperature air duct 1 is lower than a preset threshold value, exiting; otherwise, jumping to execute the next step; in this embodiment, the preset threshold is specifically-10 ℃, and if the temperature is lower than-10 ℃, the whole regulating system will not work. If the temperature is higher than minus 10 ℃, the regulating system continues to operate;
3) The control unit 3 increases the voltage output by the controllable voltage stabilizing source 4 to the heating element of the heating and temperature measuring module 13 through the PI regulator until the output voltage is equal to the preset first test voltage U 1 The temperature output by the temperature measuring element of the heating and temperature measuring module 13 is recorded as a first test temperature T 1 Generating a first test temperature T 1 Outputting and jumping to execute the step 3;
4) The control unit 3 detects the rotational speed of the controllable fan 20 and the initial rotational speed of the controllable fan 20 is v 0 The control unit 3 increases the rotating speed of the controllable fan 20 through the PI regulator until the temperature output by the temperature measuring element of the heating and temperature measuring module 13 is equal to the initial temperature T 0 The first rotation speed v of the controllable fan 20 during the test is recorded 1 Generates a first rotation speed v 1 And outputting the time change curve of (2);
5) The temperature output by the temperature measuring element of the heating and temperature measuring module 13 is equal to the initial temperature T 0 As a control target, the control unit 3 reduces the voltage output from the controllable voltage stabilizing source 4 to the heating element of the heating and temperature measuring module 13 through the PI regulator, and reduces the rotation speed of the controllable fan 20 through the PI regulator until the rotation speed of the controllable fan 20 returns to the initial rotation speed v 0 And the voltage output by the controllable voltage stabilizing source 4 to the heating element of the heating and temperature measuring module 13 is reduced to the initial voltage U 0 The test actual measurement voltage U of the heating element of the heating and temperature measuring module 13 output by the controllable voltage stabilizing source 4 in the test process is recorded 2 And a second rotational speed v of the controllable fan 20 during the test 2 Generating a test actual measurement voltage U 2 Second rotational speed v 2 And outputting the time change curves of the two.
The curves obtained in this embodiment are shown in fig. 3, where the x-axis is the time T, the y-axis T is the temperature detected by the second temperature measurement module 12, U is the voltage output by the controllable voltage stabilizing source 4, and v is the rotation speed of the controllable fan 20. Referring to fig. 3, it can be seen that the experimental step design continuity of the application method steps 2) to 4) of the testing platform for the characteristics of the SVG heat pipe radiator in the embodiment is good, so that the efficiency of the test can be effectively improved, and the energy consumption of the test can be saved.
The application method of the test platform for SVG heat pipe radiator characteristics of the embodiment can simulate the load abrupt change of the SVG heat pipe radiator, automatically acquire various curves of the SVG heat pipe radiator characteristics, and comprises a first test temperature T of a single controlled heat source heating test 1 A first rotational speed v of a single-controlled fan acceleration test 1 Time change curve of (a), test actual measurement voltage U of controlled heat source and controlled fan linkage test 2 Second rotational speed v 2 The time change curves of the two have the advantages of comprehensive functions and high reliability, and the rotating speed of the controllable fan 20 is regulated through the PI regulator, and the output voltage of the controllable voltage stabilizing source 4 is regulated through the PI regulator, so that the overshoot of the controllable fan 20 and the controllable voltage stabilizing source 4 is ensured, a good protection effect can be achieved on the controllable fan 20 and the controllable voltage stabilizing source 4, and the controllable fan 20 and the controllable voltage stabilizing source 4 are ensured to have longer service lives. The first test temperature T of the single controlled heat source heating test obtained by the application method of the test platform of the SVG heat pipe radiator characteristics of the embodiment 1 A first rotational speed v of a single-controlled fan acceleration test 1 Time change curve of (a), test actual measurement voltage U of controlled heat source and controlled fan linkage test 2 Second rotational speed v 2 The time change curves of the two can quickly and effectively measure the dynamic performance of the heat pipe radiator to be measured under the condition of abrupt load change.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (7)
1. An application method of a test platform for SVG heat pipe radiator characteristics is characterized in that: the test platform for the characteristics of the SVG heat pipe radiator comprises a constant temperature air duct (1), an air duct (2), a control unit (3) and a controllable pressure stabilizing unit (4), wherein the constant temperature air duct (1) and the air duct (2) are in sealing connection with each other, a constant temperature device (11) and a temperature measuring module (12) are arranged on the constant temperature air duct (1), a heating and temperature measuring module (13) is arranged on a region where the heat pipe radiator to be tested is arranged on the constant temperature air duct (1), the heating and temperature measuring module (13) comprises a heating element and a temperature measuring element, a controllable fan (20) is arranged at an air inlet of the air duct (2), a rectifying plate (21) and an air volume measuring module (22) are arranged in the air duct (2), an output end of the temperature measuring module (12), an output end of the heating and temperature measuring element of the temperature measuring module (13) and an output end of the air volume measuring module (22) are respectively connected with an input end of the control unit (3), a control end of the heating element of the heating and temperature measuring module (13) and a control end of the constant temperature device (11) are connected with an output end of the control unit (20) through the controllable pressure stabilizing unit (4); the application method comprises the following steps:
1) The control unit (3) controls the voltage of the heating element output by the controllable voltage stabilizing source (4) to the heating and temperature measuring module (13) to be the initial voltage U in advance 0 So that the controlled heat source (13) is at an initial voltage U 0 The SVG heat pipe radiator to be tested is heated by corresponding output power, and the control unit (3) records the initial temperature T after the temperature is stable through the temperature output by the temperature measuring element of the heating and temperature measuring module (13) 0 The method comprises the steps of carrying out a first treatment on the surface of the The temperature output by the temperature measuring element of the heating and temperature measuring module (13) specifically refers to the temperature which takes the maximum value of the temperatures output by the temperature measuring elements of the heating and temperature measuring module (13) as the final output temperature;
2) Detecting the temperature of the constant-temperature air duct (1) through the temperature measuring module (12), and if the temperature of the constant-temperature air duct (1) is lower than a preset threshold value, exiting; otherwise, jumping to execute the next step;
3) The control unit (3) is connected with the control unit through PThe I regulator increases the voltage output by the controllable voltage stabilizing source (4) to the heating element of the heating and temperature measuring module (13) until the output voltage is equal to the preset first test voltage U 1 The temperature output by the temperature measuring element of the heating and temperature measuring module (13) is recorded as a first test temperature T 1 Generating a first test temperature T 1 Outputting and jumping to execute the step 4);
4) The control unit (3) detects the rotating speed of the controllable fan (20) and the initial rotating speed of the controllable fan (20) is v 0 The control unit (3) increases the rotating speed of the controllable fan (20) through the PI regulator until the temperature output by the temperature measuring element of the heating and temperature measuring module (13) is equal to the initial temperature T 0 The first rotation speed v of the controllable fan 20 during the test is recorded 1 Generates a first rotation speed v 1 And outputting the time change curve of (2);
5) The temperature output by the temperature measuring element of the heating and temperature measuring module (13) is equal to the initial temperature T 0 As a control target, the control unit (3) reduces the voltage output by the controllable voltage stabilizing source (4) to the heating element of the heating and temperature measuring module (13) through the PI regulator, and reduces the rotating speed of the controllable fan (20) through the PI regulator until the rotating speed of the controllable fan (20) is restored to the initial rotating speed v 0 And the voltage output by the controllable voltage stabilizing source (4) to the heating element of the heating and temperature measuring module (13) is reduced to the initial voltage U 0 Recording the test actual measurement voltage U of the heating element output to the heating and temperature measuring module (13) by the controllable voltage stabilizing source (4) in the test process 2 And a second rotational speed v of the controllable fan (20) during the test 2 Generating a test actual measurement voltage U 2 Second rotational speed v 2 And outputting the time change curves of the two.
2. The method for applying the test platform for the characteristics of the SVG heat pipe radiator according to claim 1, wherein the method comprises the following steps: the constant temperature air duct (1) is located in a region where the heat pipe radiator to be measured is placed, the region is formed by three metal plates, the cross section of the region is in a structure with an opening on one side, a substrate (14) used for placing the heat pipe radiator to be measured is arranged at the opening on one side, and a heating part of the heating and temperature measuring module (13) is arranged on the outer side of the substrate (14).
3. The method for applying the test platform for the characteristics of the SVG heat pipe radiator according to claim 2, wherein: the surface of the heating and temperature measuring module (13) is provided with a plurality of temperature measuring holes (131) which are arranged in an array mode, and temperature measuring elements of the heating and temperature measuring module (13) are respectively arranged at the bottoms of the temperature measuring holes (131).
4. The method for applying the test platform for the characteristics of the SVG heat pipe radiator according to claim 1, wherein the method comprises the following steps: the air quantity metering module (22) is arranged between the rectifying plates (21).
5. The method for applying the test platform for the characteristics of the SVG heat pipe radiator according to claim 1, wherein the method comprises the following steps: the controllable steady voltage unit (4) includes first controllable steady voltage source (41) and controllable steady voltage source (42) of second, the control by temperature change end that adds hot and temperature measurement module (13) links to each other through the control output of first controllable steady voltage source (41) and control unit (3), the control by temperature change end of constant temperature equipment (11) links to each other through the control output of the controllable steady voltage source (42) of second and control unit (3).
6. The method for applying the test platform for the characteristics of the SVG heat pipe radiator according to claim 5, wherein: the control unit (3) comprises an upper computer (31), a lower computer (32), a frequency converter (33) and a DC/DC controller (34), wherein the lower computer (32) is respectively connected with the upper computer (31), the frequency converter (33) and the DC/DC controller (34), the output end of the frequency converter (33) is connected with the control end of the controllable fan (20), and the output end of the DC/DC controller (34) is respectively connected with the control ends of the first controllable voltage stabilizing source (41) and the second controllable voltage stabilizing source (42).
7. The method for applying the test platform for the characteristics of the SVG heat pipe radiator according to claim 6, wherein: the control unit (3) further comprises an ambient temperature sensor (35), and the output end of the ambient temperature sensor (35) is connected with the lower computer (32).
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