CN102808796A - Method and system for controlling rotating speed of fan - Google Patents
Method and system for controlling rotating speed of fan Download PDFInfo
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- CN102808796A CN102808796A CN2012103157335A CN201210315733A CN102808796A CN 102808796 A CN102808796 A CN 102808796A CN 2012103157335 A CN2012103157335 A CN 2012103157335A CN 201210315733 A CN201210315733 A CN 201210315733A CN 102808796 A CN102808796 A CN 102808796A
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Abstract
The invention provides a method and a system for controlling the rotating speed of a fan. The system comprises a monitoring unit for monitoring the work environment of electronic equipment and further comprises a temperature monitoring module and a power monitoring module, wherein the temperature monitoring module is positioned at an air inlet and an air outlet of the electronic equipment and is used for respectively monitoring and outputting the temperatures at the air inlet and the air outlet; and the power monitoring module is used for monitoring and outputting the power of the electronic equipment; and a control unit is connected with the monitoring unit and the fan and is used for calculating the temperature difference between the air inlet and the air outlet after the temperatures outputted by the temperature monitoring module at the air inlet and the air outlet are received as well as the power of the electronic equipment outputted by the power monitoring module, obtaining the air density in the environment where the electronic equipment is positioned based on the temperature difference, the power and the rotating speed of the fan, and controlling the rotating speed of the fan based on the air density. Therefore, the rotating speed of the fan can be intelligently changed.
Description
Technical field
The present invention relates to a kind of controlling method, particularly relate to a kind of method and system of controlling rotation speed of the fan.
Background technique
Air heat dissipation technology based on fan is the most frequently used mode of electronic equipment dissipating heat that is.Particularly, the air quantity that fan was exported in the unit time is big more, and the effect of its heat radiation is good more, but simultaneously, air output is directly proportional with watt level, and for low altitude area and high altitude localities, the heat dispersion that fan provided of equal-wattage differs greatly.This mainly is that the fan of equal-wattage differs greatly in the air quantity of the per unit volume that Different Altitude Regions can be exported because the air density of Different Altitude Regions is different.Yet present fan control strategy only relies on the inlets and putlets of ventilation of electronic equipment or the temperature of electronic device to regulate the rotating speed of fan, and does not consider that air density is to influence that fan brought.For this reason, the existing mode of adjusting rotation speed of the fan according to height above sea level comprises: 1) in electronic equipment, set up the height above sea level meter and come the existing rotation speed of the fan strategy of artificial adjustment to satisfy the heat radiation requirement of the electronic equipment of high height above sea level according to the altitude that the height above sea level meter is shown.This mode has increased cost of labor.2) control strategy of fan is set according to the configuration of high height above sea level; With making fan that too much cooling air quantity is provided in the low altitude area; The shortcoming of this mode is for the electronic equipment that is positioned at the low altitude area, and powerful fan not only increases energy consumption, and noise is big.
Therefore, need improve, so that the rotating speed of respective fans can be provided based on electronic equipment altitude of living in to existing fan control technology.
Summary of the invention
The shortcoming of existing technology the object of the present invention is to provide a kind of method and system of controlling rotation speed of the fan in view of the above, so that the fan that is located in the electronic equipment of high altitude localities provides corresponding air output.
For realizing above-mentioned purpose and other relevant purposes; The present invention provides a kind of system that controls rotation speed of the fan, and said fan is used for to electronic equipment dissipating heat, and it comprises: monitoring cell; Be used to monitor said electronic device works environment; Comprise: power monitoring module, and the temperature monitoring module that is positioned at the intake grill and the exhaust outlet of said electronic equipment, said temperature monitoring module are used for monitoring the temperature of said intake grill and exhaust outlet respectively and this temperature being exported; Said power monitoring module is used to monitor the power of said electronic equipment and export; Control unit; Be connected with said monitoring cell and fan; Be used to receive the temperature difference of calculating intake grill and exhaust outlet after the temperature of said intake grill and exhaust outlet of said temperature monitoring module output; And the power of the said electronic equipment of said power monitoring module output, and obtain the air density of said electronic equipment environment of living in based on the rotating speed of said temperature difference, said power and said fan, and control the rotating speed of said fan based on said air density.
Preferably; Said control unit comprises: computing module is used for obtaining based on the rotating speed of the relation that is directly proportional of the power of the temperature difference of the intake grill of the said electronic equipment of being gathered and exhaust outlet and the relation that is inversely proportional to of the air density of said electronic equipment environment of living in, current said electronic equipment and the air density of said electronic equipment environment of living in and said fan the air density of said electronic equipment environment of living in; Sub-control module; Be used for and compare with preset air density from the said air density of said computing module; To determine whether to change the rotating speed of said fan; And when confirm changing said rotation speed of the fan, the ratio of preset air density and the said air density of being calculated as the coefficient that changes said rotation speed of the fan, is changed rotating speed to control said fan.
Preferably, said computing module also comprises: sub-computing module, be used for based on the temperature difference of the said electronic equipment inlets and putlets of ventilation of being gathered and the power of current said electronic equipment, and utilize following formula to obtain the air density of said fan environment of living in;
Wherein, ρ is an air density;
P is the power of current said electronic equipment;
D is the specific heat at constant pressure constant;
V is the air output of said fan;
Ta is the temperature of the exhaust outlet of said electronic equipment;
Tb is the temperature of the intake grill of said electronic equipment.
Based on above-mentioned purpose; The present invention also provides a kind of method of controlling rotation speed of the fan; Said fan is used for to electronic equipment dissipating heat, and it comprises step: 1) obtain the current performance number of the temperature of the intake grill of said electronic equipment, the temperature of exhaust outlet, said electronic equipment and the rotating speed of the fan in the said electronic equipment; 2) obtain temperature difference based on the intake grill of the said electronic equipment of being gathered and the temperature of exhaust outlet; And obtain the air density of said electronic equipment environment of living in based on the rotating speed of said temperature difference, said power and said fan, control the rotating speed of said fan again based on said air density.
Preferably, said step 2) comprising: the air density that 2-1) obtains said electronic equipment environment of living in based on the rotating speed of the relation that is directly proportional of the power of the temperature difference of the intake grill of the said electronic equipment of being gathered and exhaust outlet and the relation that is inversely proportional to of the air density of said electronic equipment environment of living in, current said electronic equipment and the air density of said fan environment of living in and said fan; 2-2) said air density that is obtained and preset air density are compared; To determine whether to change the rotating speed of said fan; And when confirming to change said rotation speed of the fan; The ratio of preset air density and the said air density of being calculated as the coefficient that changes said rotation speed of the fan, and is controlled said fan and changed rotating speed.
Preferably, said step 2-1) also comprise:, utilize following formula to obtain the air density of said fan environment of living in based on the temperature difference of the said electronic equipment inlets and putlets of ventilation of being gathered and the power of current said electronic equipment;
Wherein, ρ is an air density;
P is the power of current said electronic equipment;
D is the specific heat at constant pressure constant;
V is the air output of said fan;
Ta is the temperature of the exhaust outlet of said electronic equipment;
Tb is the temperature of the intake grill of said electronic equipment.
As stated; A kind of method and system of controlling rotation speed of the fan of the present invention; Have following beneficial effect: the rotating speed that utilizes the rotating speed of current power of the intake grill of said electronic equipment and the temperature difference of exhaust outlet, said electronic equipment and the fan in the said electronic equipment to control fan calculates the residing air density of said electronic equipment; The air density according to current that can intelligence controlled the rotating speed of fan, makes fan delivery air amount different problems because of electronic equipment location altitude is different thereby solved; In addition; Utilize the linear relationship of the current performance number of temperature difference and the said electronic equipment of inlets and putlets of ventilation of air density, said electronic equipment to control the rotating speed of fan; Can be according to the adjustment rotation speed of the fan of the actual altitude intelligence of electronic equipment; Make fan better be electronic equipment dissipating heat, solve the energy consumption problem of electronic equipment with suiting measures to local conditions in different regions.
Description of drawings
Fig. 1 is shown as the structural representation of the system of control rotation speed of the fan of the present invention.
Fig. 2 is shown as a kind of structural representation of preferred implementation of the system of control rotation speed of the fan of the present invention.
Fig. 3 is shown as the flow chart of the method for control rotation speed of the fan of the present invention.
Fig. 4 is shown as a kind of flow chart of preferred implementation of the method for control rotation speed of the fan of the present invention.
The element numbers explanation
1 control system
11 monitoring cell
111 temperature monitoring modules
112 power monitoring modules
12 control units
121 computing modules
122 sub-control modules
2 electronic equipments
21 intake grills
22 exhaust outlets
23 fans
S1 ~ S2, S21, S22 step
Embodiment
Below through specific instantiation mode of execution of the present invention is described, those skilled in the art can understand other advantages of the present invention and effect easily by the content that this specification disclosed.The present invention can also implement or use through other different embodiment, and each item details in this specification also can be based on different viewpoints and application, carries out various modifications or change under the spirit of the present invention not deviating from.
Need to prove; The diagram that is provided in the present embodiment is only explained basic conception of the present invention in a schematic way; Satisfy only show in graphic with the present invention in relevant assembly but not component count, shape and plotted when implementing according to reality; Kenel, quantity and the ratio of each assembly can be a kind of random change during its actual enforcement, and its assembly layout kenel also maybe be more complicated.
Fig. 1 is the structural representation of the system of control rotation speed of the fan of the present invention.Said control system 1 is used to control the rotating speed of fan 23, so that fan 23 can provide stable heat sinking function for electronic equipment 2 under the Different Altitude condition.Said electronic equipment 2 includes but not limited to: server, computer equipment etc.Said control system 1 comprises: monitoring cell 11, control unit 12.
Said monitoring cell 11 is used to monitor the working environment of said electronic equipment 2, and it comprises at least: temperature monitoring module 111, power monitoring module 112.
Said temperature monitoring module 111 is a plurality of, lays respectively at the air intake 21 and air-out 22 of said electronic equipment 2, is used for monitoring respectively the temperature of said intake grill 21 and exhaust outlet 22, and this temperature is exported.Wherein, said temperature monitoring module 111 comprises any sensor that can experience temperature and convert usable output signal to.
Said power monitoring module 112 is used to monitor the power of said electronic equipment 2 and export.Wherein, said power monitoring module 112 comprises any sensor that can gather said electronic equipment 2 power.Preferably, said power monitoring module 112 comprises the sampling resistor that is electrically connected with said electronic equipment 2, and the resistance of current value of gathering based on said sampling resistor and said electronic equipment 2 is confirmed the performance number that said electronic equipment 2 is current.
Said control unit 12 is connected with said monitoring cell 11, said fan 23; Be used to receive the temperature difference of calculating intake grill 21 and exhaust outlet 22 after the temperature of said intake grill 21 and air-out 22 of said temperature monitoring module 111 outputs; And fan 23 power of said power monitoring module 112 outputs; And obtain the air density of said electronic equipment 2 environment of living in, and control the rotating speed of said fan 23 based on said air density based on the rotating speed of said temperature difference, said power and said fan 23.Wherein, said control unit 12 is obtained the rotating speed of said fan 23 under the acquiescence control strategy.
Particularly, as shown in Figure 2, said control unit 12 comprises: computing module 121 and sub-control module 122.
Said computing module 121 is used for obtaining based on the rotating speed of the relation that is directly proportional of the power of the temperature difference of intake grill of the said electronic equipment of being gathered 2 21 and exhaust outlet 22 and the relation that is inversely proportional to of the air density of said electronic equipment 2 environment of living in, current said electronic equipment 2 and the air density of said electronic equipment 2 environment of living in and said fan 23 air density of said electronic equipment 2 environment of living in.
Preferably; Sub-computing module in the said computing module 121 (not giving diagram) utilizes formula (1) to obtain the air density of said fan 23 environment of living in based on the temperature difference of said electronic equipment 2 inlets and putlets of ventilation of being gathered and the power of current said electronic equipment 2.
Wherein, ρ is an air density;
P is the power of current said electronic equipment;
D is specific heat at constant pressure constant (J/kg*K);
V is the air output of said fan;
Ta is the temperature of the exhaust outlet of said electronic equipment;
Tb is the temperature of the intake grill of said electronic equipment.
For example; The temperature that said sub-computing module is obtained the intake grill 21 of the said electronic equipment of being gathered 2 is 15 ℃; The temperature of exhaust outlet 22 is 30 ℃; The performance number of said electronic equipment 2 is 500w, and 4500 revolutions per seconds of the revolutions of said fan 23, and the air output that then said sub-computing module is obtained said fan 23 based on the corresponding relation of preset fan 23 rotating speeds and air output is 0.0346m
3/ s; Then, the said sub-computing module air density that obtains said electronic equipment 2 environment of living in based on formula (1) is 0.944kg/m
3
Said sub-control module 122 is used for the said air density from said computing module 121 is compared with preset air density; To determine whether to change the rotating speed of said fan 23; And when confirm changing said fan 23 rotating speeds; The ratio of preset air density and the said air density of being calculated as the coefficient that changes said fan 23 rotating speeds, is changed rotating speeds to control said fan 23.Wherein, said preset air density includes but not limited to: the air density on normal temperature sea level (1.18kg/m3).
Need to prove, it should be appreciated by those skilled in the art that the said fan 23 of control changes the mode of rotating speed, is not described in detail in this.
Particularly; Said sub-control module 122 will be compared with preset air density from the said air density of said computing module 121; When the air density of being calculated then changes the rotating speed of said fan 23 less than preset air density, otherwise, the rotating speed of said fan 23 then do not changed; When confirm changing said fan 23 rotating speeds; Said sub-control module 122 with the ratio of preset air density and the said air density of being calculated as the coefficient that changes said fan 23 rotating speeds; Again with the product of the rotating speed of preset fan 23 and said coefficient as the new rotating speed of said fan 23, and control said fan 23 change rotating speeds.Wherein, the rotating speed of preset fan comprises: the rotating speed of said fan under the acquiescence control strategy.
For example, said sub-control module 122 is based on the air density 0.944kg/m that is calculated<sup >3</sup><preset air density 1.18kgm<sup >3</sup>, then definite rotating speed that changes said fan 23, then, said sub-control module 122 obtains the coefficient of said fan 23 rotating speeds of change based on the ratio of preset air density with the air density of being calculated<img file="BDA00002077421300061.GIF" he="107" img-content="drawing" img-format="GIF" inline="yes" orientation="portrait" wi="333" />Then said sub-control module 122 obtains the rotating speed (4500 revolutions per seconds) of said fan 23 under the acquiescence control strategy and the product of said coefficient; The new rotating speed v that obtains said fan 23 is 1.25*4500 revolutions per second; And convert the new rotating speed of said fan 23 to control command, so that change the rotating speed of said fan 23 into 5625 revolutions per seconds.
As shown in Figure 3, the present invention also provides a kind of method of controlling rotation speed of the fan.Said method is mainly carried out by said control system, and wherein, said fan is used for to electronic equipment dissipating heat.
In step S1, said control system is obtained the current performance number of the temperature of the intake grill of said electronic equipment, the temperature of exhaust outlet, said fan and the rotating speed of the fan in the said electronic equipment.
Particularly, said control system is obtained corresponding temperature value through the temperature monitoring module that is positioned at said electronic equipment intake grill, exhaust outlet; Said control system is obtained the current performance number of said electronic equipment through the power monitoring module that is connected with said electronic equipment; Said control system obtains the rotating speed of said fan under the acquiescence control strategy.
Then, in step S2, said control system is controlled the rotating speed of said fan based on the rotating speed of the performance number of the intake grill of the said electronic equipment of being gathered and the temperature difference of exhaust outlet, current said electronic equipment and said fan.
Particularly, as shown in Figure 4, said step S2 also comprises: step S21 and step S22.
In step S21; Said control system is based on the relation that is inversely proportional to of the air density of the temperature difference of the intake grill of the said electronic equipment of being gathered and exhaust outlet and said electronic equipment environment of living in, and the power of current said electronic equipment and the relation that is directly proportional of the air density of said wind-powered electricity generation subset environment of living in obtain the air density of said electronic equipment environment of living in.
Preferably, said control system utilizes formula (1) to obtain the air density of said fan environment of living in based on the temperature difference of the said electronic equipment inlets and putlets of ventilation of being gathered and the power of current said electronic equipment.
For example; The temperature that said control system obtains the intake grill of the said electronic equipment of being gathered is that 15 ℃, the temperature of exhaust outlet are 30 ℃; The performance number of said electronic equipment is 500w; And 4500 revolutions per seconds of the revolutions of said fan, be 0.0346m then based on the air output that the corresponding relation of preset rotation speed of the fan and air output is obtained said fan
3/ s; Then, the said control system air density that obtains said electronic equipment environment of living in based on formula (1) is 0.944kg/m
3
Then; In step S22; Said control system is compared air density that is obtained and preset air density, determining whether to change the rotating speed of said fan, and when confirming to change said rotation speed of the fan; The ratio of preset air density and the said air density of being calculated as the coefficient that changes said rotation speed of the fan, is changed rotating speed to control said fan.Wherein, said preset air density includes but not limited to: the air density on normal temperature sea level (1.18kg/m3).
Need to prove, it should be appreciated by those skilled in the art that the said fan 23 of control changes the mode of rotating speed, is not described in detail in this.
Particularly, said control system is compared said air density that is obtained and preset air density, when the air density of being calculated then changes the rotating speed of said fan less than preset air density, otherwise, then do not change the rotating speed of said fan; When confirming to change said rotation speed of the fan; Said control system with the ratio of preset air density and the said air density of being calculated as the coefficient that changes said rotation speed of the fan; Again with the product of the rotating speed of preset fan and said coefficient as the new rotating speed of said fan, and control said fan change rotating speed.Wherein, the rotating speed of preset fan comprises: the rotating speed of said fan under the acquiescence control strategy.
For example, said control system is based on the air density 0.944kg/m that is calculated<sup >3</sup><preset air density 1.18kgm<sup >3</sup>, then definite rotating speed that changes said fan, then, said control system obtains the coefficient of the said rotation speed of the fan of change based on the ratio of preset air density with the air density of being calculated<img file="BDA00002077421300071.GIF" he="107" img-content="drawing" img-format="GIF" inline="yes" orientation="portrait" wi="333" />Then said control system is based on the rotating speed (4500 revolutions per seconds) of preset fan and the product of said coefficient; The new rotating speed v that obtains said fan is 1.25*4500 revolutions per second; And convert the new rotating speed of said fan to control command, so that change the rotating speed of said fan into 5625 revolutions per seconds.
In sum; The method and system of control rotation speed of the fan of the present invention; The rotating speed that utilizes the rotating speed of current power of the intake grill of said electronic equipment and the temperature difference of exhaust outlet, said electronic equipment and the fan in the said electronic equipment to control fan calculates the residing air density of said electronic equipment; The air density according to current that can intelligence controlled the rotating speed of fan, makes fan delivery air amount different problems because of electronic equipment location altitude is different thereby solved; In addition; Utilize the linear relationship of the current performance number of temperature difference and the said electronic equipment of inlets and putlets of ventilation of air density, said electronic equipment to control the rotating speed of fan; Can be according to the adjustment rotation speed of the fan of the actual altitude intelligence of electronic equipment; Make fan better be electronic equipment dissipating heat, solve the energy consumption problem of electronic equipment with suiting measures to local conditions in different regions.So the present invention has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
The foregoing description is illustrative principle of the present invention and effect thereof only, but not is used to limit the present invention.Any be familiar with this technological personage all can be under spirit of the present invention and category, the foregoing description is modified or is changed.Therefore, have common knowledge the knowledgeable in the affiliated such as technical field, must contain by claim of the present invention not breaking away from all equivalence modifications of being accomplished under disclosed spirit and the technological thought or changing.
Claims (6)
1. system that controls rotation speed of the fan, said fan is used for it is characterized in that to electronic equipment dissipating heat, comprises at least:
Monitoring cell; Be used to monitor said electronic device works environment; Comprise: the power monitoring module; And the temperature monitoring module that is positioned at the intake grill and the exhaust outlet of said electronic equipment, said temperature monitoring module is used for monitoring the temperature of said intake grill and exhaust outlet respectively and this temperature being exported; Said power monitoring module is used to monitor the power of said electronic equipment and export;
Control unit; Be connected with said monitoring cell and fan; Be used to receive the temperature difference of calculating intake grill and exhaust outlet after the temperature of said intake grill and exhaust outlet of said temperature monitoring module output; And the power of the said electronic equipment of said power monitoring module output, and obtain the air density of said electronic equipment environment of living in based on the rotating speed of said temperature difference, said power and said fan, and control the rotating speed of said fan based on said air density.
2. the system of control rotation speed of the fan according to claim 1 is characterized in that, said control unit comprises:
Computing module is used for obtaining based on the rotating speed of the relation that is directly proportional of the power of the temperature difference of the intake grill of the said electronic equipment of being gathered and exhaust outlet and the relation that is inversely proportional to of the air density of said electronic equipment environment of living in, current said electronic equipment and the air density of said electronic equipment environment of living in and said fan the air density of said electronic equipment environment of living in;
Sub-control module; Be used for and compare with preset air density from the said air density of said computing module; To determine whether to change the rotating speed of said fan; And when confirm changing said rotation speed of the fan, the ratio of preset air density and the said air density of being calculated as the coefficient that changes said rotation speed of the fan, is changed rotating speed to control said fan.
3. the system of control rotation speed of the fan according to claim 1; It is characterized in that; Said computing module also comprises: sub-computing module; Be used for based on the temperature difference of the said electronic equipment inlets and putlets of ventilation of being gathered and the power of current said electronic equipment, utilize following formula to obtain the air density of said fan environment of living in;
Wherein, ρ is an air density;
P is the power of current said electronic equipment;
D is the specific heat at constant pressure constant;
V is the air output of said fan;
Ta is the temperature of the exhaust outlet of said electronic equipment;
Tb is the temperature of the intake grill of said electronic equipment.
4. method of controlling rotation speed of the fan, said fan is used for it is characterized in that to electronic equipment dissipating heat, comprises step:
1) obtains the current performance number of the temperature of the intake grill of said electronic equipment, the temperature of exhaust outlet, said electronic equipment and the rotating speed of the fan in the said electronic equipment;
2) obtain temperature difference based on the intake grill of the said electronic equipment of being gathered and the temperature of exhaust outlet; And obtain the air density of said electronic equipment environment of living in based on the rotating speed of said temperature difference, said power and said fan, control the rotating speed of said fan again based on said air density.
5. the method for control rotation speed of the fan according to claim 4 is characterized in that, said step 2) comprising:
2-1) obtain the air density of said electronic equipment environment of living in based on the rotating speed of the relation that is directly proportional of the power of the temperature difference of the intake grill of the said electronic equipment of being gathered and exhaust outlet and the relation that is inversely proportional to of the air density of said electronic equipment environment of living in, current said electronic equipment and the air density of said fan environment of living in and said fan;
2-2) said air density that is obtained and preset air density are compared; To determine whether to change the rotating speed of said fan; And when confirming to change said rotation speed of the fan; The ratio of preset air density and the said air density of being calculated as the coefficient that changes said rotation speed of the fan, and is controlled said fan and changed rotating speed.
6. the method for control rotation speed of the fan according to claim 4 is characterized in that, said step 2-1) also comprise:
Based on the temperature difference of the said electronic equipment inlets and putlets of ventilation of being gathered and the power of current said electronic equipment, utilize following formula to obtain the air density of said fan environment of living in;
Wherein, ρ is an air density;
P is the power of current said electronic equipment;
D is the specific heat at constant pressure constant;
V is the air output of said fan;
Ta is the temperature of the exhaust outlet of said electronic equipment;
Tb is the temperature of the intake grill of said electronic equipment.
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| CN103968805A (en) * | 2014-06-04 | 2014-08-06 | 浪潮电子信息产业股份有限公司 | Method for testing and correcting altitude for working of server by virtue of back pressure of fan |
| CN103983244A (en) * | 2014-06-04 | 2014-08-13 | 浪潮电子信息产业股份有限公司 | Method for computing server altitude by use of fan performance change rule |
| CN105526183A (en) * | 2014-09-30 | 2016-04-27 | 联想(北京)有限公司 | Method and device for controlling rotating speed of fan |
| CN105828577A (en) * | 2016-03-28 | 2016-08-03 | 联想(北京)有限公司 | Electronic device and control method thereof |
| CN106255392A (en) * | 2016-09-21 | 2016-12-21 | 珠海格力电器股份有限公司 | The cooling control method of regulator cubicle, device and system |
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| CN109917883A (en) * | 2019-03-12 | 2019-06-21 | 苏州浪潮智能科技有限公司 | A kind of server and its fan control system |
| CN110012649A (en) * | 2019-05-08 | 2019-07-12 | 苏州浪潮智能科技有限公司 | A kind of power supply heat sinking control method and system |
| CN110544862A (en) * | 2019-08-21 | 2019-12-06 | 大族激光科技产业集团股份有限公司 | air-cooled fiber laser system and method capable of automatically adjusting temperature |
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