CN103605254A - Method and device for determining liquid adding and alarming time of liquid cooling system of projector - Google Patents
Method and device for determining liquid adding and alarming time of liquid cooling system of projector Download PDFInfo
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- CN103605254A CN103605254A CN201310603700.5A CN201310603700A CN103605254A CN 103605254 A CN103605254 A CN 103605254A CN 201310603700 A CN201310603700 A CN 201310603700A CN 103605254 A CN103605254 A CN 103605254A
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- 239000007788 liquid Substances 0.000 title claims abstract description 309
- 238000001816 cooling Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 239000002826 coolant Substances 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 8
- 230000000052 comparative effect Effects 0.000 claims description 4
- 230000005693 optoelectronics Effects 0.000 abstract 3
- 238000005057 refrigeration Methods 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 230000003203 everyday effect Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The invention relates to a method and device for determining liquid adding and alarming time of a liquid cooling system of a projector. The method includes the steps that one of reflection-type optoelectronic switches of a small liquid level detection plate is placed on a first detection point preset at the current rotation speed of a liquid pump, the other one of the reflection-type optoelectronic switches is placed on a preset second detection point, and the second detection point is lower than the first detection point; if the rotation speed of the liquid pump changes, the small liquid level detection plate is moved according to determined displacement, and thus a new first detection point and a new second detection point which correspond to the reflection-type optoelectronic switches are obtained after the small liquid level detection plate is moved; the height of the liquid level is compared with the height of the new first detection point and the height of the new second detection point, and whether corresponding liquid adding prompt information and alarming information are displayed or not is determined according to the comparison result. With the method and device, changes of the liquid level can be detected in real time, the situation that because of liquid leakage, liquid adding time set by a factory is not accurate is avoided, and thus the projector can work safely without errors.
Description
Technical field
The present invention relates to projector heat radiation technical field, particularly relate to a kind of projector liquid cooling system liquid feeding and alarm time and determine method and device.
Background technology
When projector works, heat is mainly derived from the imaging system of projector inside, the power unit of projector and projection bulb etc., if not in time these heats are discharged rapidly from projector, these heats will make the very high temperature of the inner generation of projector so, greatly reduce the work efficiency of projector, if worked long hours, projector also can shorten serviceable life greatly.
As shown in Figure 1, projector powers on and opens liquid pump and liquid cooling fan the principle of work of traditional projector's liquid cooling refrigeration system at once, and liquid coolant is circulated in LED water-cooling head and liquid cooling fan.LED substrate leads to heat transfer, the heats such as LED light source is passed to the liquid coolant of LED water-cooling head the inside, and the higher liquid coolant of temperature that LED water-cooling head flows out is sent in liquid cooling fan dispels the heat.If think that radiating effect is better, open refrigeration system, liquid coolant reduces through refrigeration system temperature, then circulation enters LED water-cooling head according to this, liquid cooling fan dispels the heat.
Current liquid cooling system Zhong， producer of projector, according to liquid coolant actual evaporation test data, provides the liquid feeding time of liquid cooling system.Projector is in operational process, and system can be recorded the accumulative total working time of projector, when it surpasses liquid feeding threshold values during the time, controls software operation interface and will point out liquid feeding.But all can there is the possibility of leakage in projector, once there is leakage, the liquid feeding time that producer provides will be no longer applicable, can have a strong impact on the use of projector, cause severe result after dispatching from the factory and in use procedure.
Summary of the invention
Based on this, be necessary for the problems referred to above, provide a kind of projector liquid cooling system liquid feeding and alarm time to determine method and device.
Projector's liquid cooling system liquid feeding and alarm time are determined a method, comprise step:
Liquid level is detected to one of them reflective photoelectric switch of platelet and be placed in the first detecting point default under the current rotating speed of liquid pump, another reflective photoelectric switch is placed in the second default detecting point, and described the second detecting point is lower than described the first detecting point;
If liquid pump rotating speed changes, liquid level is detected to platelet and according to definite displacement, move, obtain the first new detecting point that mobile rear each reflective photoelectric switch is corresponding, the second new detecting point;
Relatively the height of liquid level and new the first detecting point, new the second detecting point, determines whether to show corresponding liquid feeding information, warning information according to the result comparing.
Projector's liquid cooling system liquid feeding and an alarm time determining device, comprising:
Be fixed on the vertical movement track of tank for coolant outer wall, if liquid pump rotating speed changes, liquid level detection platelet at described vertical movement rail moving, obtains the first new detecting point that mobile rear each reflective photoelectric switch is corresponding, the second new detecting point according to definite displacement;
The liquid level that is arranged on described vertical movement track detects platelet, comprise reflective photoelectric switch, differential comparator, one of them reflective photoelectric switch is positioned at the first detecting point default under the current rotating speed of liquid pump, another reflective photoelectric switch is positioned at the second default detecting point lower than described the first detecting point, described differential comparator, for the height of liquid level relatively and new the first detecting point, new the second detecting point, determines whether to show corresponding liquid feeding information, warning information according to the result comparing.
Above-mentioned projector liquid cooling system liquid feeding and alarm time are determined method and device, when rotation speed change, move described liquid level detect platelet by the displacement of calculating, and obtain the first new detecting point and the second new detecting point after moving.If liquid level is not higher than described the first new detecting point, the liquid feeding interface end corresponding with the first new detecting point exported high level, the alarm interface end output low level corresponding with the second new detecting point, prompting liquid feeding.If liquid level is not higher than the second new detecting point, described liquid feeding interface end, alarm interface end are all exported high level, the too low alarm of liquid level.
Compared to traditional factory, is set the liquid feeding time, the present invention has the following advantages:
1, detect in real time liquid level and change, the situation ，Shi projector such as liquid feeding time that the factory that effectively avoided because leakage etc. caused arranges is inaccurate can safe and punctual work;
2, oneself sets liquid feeding time and alarm time as required, and factory does not need the liquid feeding time of projector to test, and has saved the manpower and materials of factory etc.
Accompanying drawing explanation
The structural representation of Tu1Wei prior art projector liquid cooling refrigeration system;
Fig. 2 is the schematic flow sheet of the inventive method embodiment;
Fig. 3 is that the present invention controls the schematic flow sheet that liquid level detection platelet moves embodiment;
Fig. 4 is the structural representation of apparatus of the present invention embodiment;
Fig. 5 is the structural representation that liquid level detects platelet embodiment.
Embodiment
Below in conjunction with accompanying drawing, projector of the present invention liquid cooling system liquid feeding and alarm time are determined to the specific implementation method of method is described in detail.
As shown in Figure 2, a kind of projector liquid cooling system liquid feeding and alarm time are determined method, comprise step:
S110, one of them reflective photoelectric switch that liquid level is detected to platelet are placed in the first detecting point default under the current rotating speed of liquid pump, another reflective photoelectric switch is placed in the second default detecting point, described the second detecting point is lower than described the first detecting point, wherein said the first detecting point is used for judging whether to need liquid feeding, and the second detecting point is used for judging that whether liquid level is too low;
If S120 liquid pump rotating speed changes, liquid level is detected to platelet and according to definite displacement, move, obtain the first new detecting point that mobile rear each reflective photoelectric switch is corresponding, the second new detecting point;
The height of S130, comparison liquid level and new the first detecting point, new the second detecting point, determines whether to show corresponding liquid feeding information, warning information according to result relatively.
When liquid pump rotating speed changes, the height of liquid level is vertical change, and liquid level described in step S120 detects platelet and can on vertical movement track, move, and guarantees the accuracy that liquid level detects.Tracks also can tilt, but after liquid level detects platelet and moves, reflective photoelectric switch likely can not detect liquid surface level due to Angulation changes, or the liquid level detecting is not actual liquid level, and the degree of accuracy of liquid level detection is lower.Front end face and reflector due to reflective photoelectric switch need to remain in specialized range simultaneously, and as a preferred embodiment, reflective photoelectric switch should paste cooling tank wall as far as possible, guarantees the sensitivity detecting.Reflective photoelectric switch also can replace with other functionally similar level switches.Can be for rotating speed is the first detecting point, the second detecting point of determining for 0 o'clock under current rotating speed in step S110, the first detecting point, second of determining in the time of also can be for a concrete rotating speed is detected point.Wherein the first detecting point, the second detecting point can be determined according to the volatilization time of liquid coolant, interval time etc., user also as required setting example as the 3rd detecting point etc., liquid level is carried out to detection early warning in various degree.
The rotating speed of liquid pump is controlled, if rotating speed does not change, directly relatively liquid level and first is detected the height that point, second is detected point.As an embodiment, when liquid level is during higher than the first detecting point, put corresponding liquid feeding interface end output low level with the first detecting, put corresponding alarm interface end output low level with the second detecting; When liquid level is not during higher than the first detecting point, higher than the second detecting point, described liquid feeding interface end output high level, described alarm interface end output low level, prompting liquid feeding; If liquid level is not during higher than the second detecting point, described liquid feeding interface end and alarm interface end are all exported high level, the too low alarm of liquid level; If described liquid feeding interface end is low level, described alarm interface end is high level, and the system failure is reported to the police.Also can control and whether point out the too low alarm of liquid feeding or liquid level or the system failure to report to the police by the corresponding interface end output low level in addition.
If rotating speed changes, the liquid level of liquid coolant also can change.If reflective photoelectric switch is fixed, for the liquid of as much, what when liquid pump rotating speed is slower, liquid level raise is less, if now liquid level lower than the first detecting o'clock higher than the second detecting point; What when the rotating speed of liquid pump is very fast, liquid level raise is more, and now liquid level is just likely higher than two detecting points, and the liquid of as much is because the different testing results of liquid pump rotating speed will be different, makes correctly to judge the liquid feeding time difficulty that becomes.So will move described liquid level according to the variation of rotating speed, detect platelet, make the first detecting point that reflective photoelectric switch is corresponding new, the second new detecting point, and then compare again.
When step S120 medium speed changes, determine that the displacement that liquid level detection platelet moves can have multiple implementation method, for example, as an embodiment, determine that the step of liquid level detection platelet moving displacement comprises:
If current liquid level, higher than described the first detecting point, determines that according to formula H1=K1*V1 described liquid level detects platelet moving displacement H1; Wherein K1 is that definite liquid level changes and rotation speed change coefficient of relationship, and V1 is rotation speed change;
If current liquid level higher than described the second detecting point, determines that according to formula H2=K2*V2 described liquid level detects platelet moving displacement H2 lower than described the first detecting point; Wherein K2 is that definite liquid level changes and rotation speed change coefficient of relationship, and V2 is rotation speed change.
Wherein the step of Coefficient of determination K1, K2 comprises: according to the rotating speed of measuring some liquid level of different time, change, adopt formula liquid level variation/rotation speed change Coefficient of determination K1, K2.
Because having influence on liquid level, how many meetings of liquid coolant change the relation with rotation speed change, so liquid level changes the coefficient of relationship with rotation speed change in the time of need to measuring liquid level differing heights.The type of liquid coolant and the size of cooling tank etc. also can have influence on the relation of liquid level variation and rotation speed change simultaneously, so need to remeasure coefficient of relationship between the two for dissimilar projector.
How concrete mobile liquid level detects platelet when understanding rotation speed change, below in conjunction with accompanying drawing 3, elaborates.
As shown in Figure 3, the movement of control liquid level detection platelet comprises step:
S122, judge whether the rotation speed change V of liquid pump equals 0, if return to step S122, if not, enter step S123;
S123, judge that whether current liquid level is higher than the first detecting point, current liquid level refers to the liquid level before rotation speed change, the first detecting point refers to the detecting of first before rotation speed change point, if enter step S124, enter if not step S127, the condition that enters step S127 mainly refers to current liquid level here lower than the first detecting point, higher than the second detecting point;
S124, judge whether rotation speed change V is greater than 0, if enter step S125, enter if not step S126;
S125, liquid level is detected to the platelet H1 that moves up, H1 is current liquid level definite moving displacement during higher than described the first detecting point, enters step S122;
S126, liquid level is detected to platelet move down H1, H1 is current liquid level definite moving displacement during higher than described the first detecting point, enters step S122;
S127, judge whether rotation speed change V is greater than 0, if enter step S128, enter if not step S129;
S128, liquid level is detected to the platelet H2 that moves up, H2 is current liquid level definite moving displacement during higher than described the first detecting point, enters step S122;
S129, liquid level is detected to platelet move down H2, H2 is current liquid level definite moving displacement during higher than described the first detecting point, enters step S122.
As an embodiment, can control the movement that liquid level detects platelet by motor driver Driving Stepping Motor, making liquid level detect platelet can accurately locate.
As an embodiment, after showing the step of liquid feeding information in step S130, can also comprise the step that records liquid feeding prompt time; After the step of display alarm information, can also comprise the step that records alarm time;
If liquid feeding prompt time and the alarm time of record differ the default time that is less than, show leakage warning information.The liquid feeding prompt time of record and alarm time can be the time while showing the earliest, and the default time can be from the first detecting o'clock, to the second detecting, to put the random time of time used while being less than no leakage, such as 20 hours etc.
Reflective photoelectric switch is subject to liquid pump PWM(Pulse Width Modulation, pulse-length modulation) impact of signal, produce with PWM with spike frequently.For example in system of the present invention, liquid pump pwm signal frequency is 200Hz, and the width of spike is approximately 200us so.When opening refrigeration system, because refrigeration system electric current is larger, metal-oxide-semiconductor (Metal-Oxid-Semiconductor, metal-oxide semiconductor fieldeffect transistor) gauge tap has produced larger interference, cause power supply unstable, existing with disturbing pulse frequently, there is certain interference in reflective photoelectric switch output.Because the spike duration is not long, can adopt the method head it off of software filtering.As an embodiment, can determine whether to show corresponding liquid feeding information, warning information according to the described comparative result of continuous preset times sampling, for example to described liquid feeding interface end and alarm interface end every 1ms once sampling, the constant judgement sampling of continuous 6 sampled values is effectively.
Liquid feeding information can show in the mode of pilot lamp, also can point out in the mode of alarm.Because liquid level is o'clock longer to the second detecting point time from the first detecting, if never have liquid feeding, liquid feeding information frequently shows, the situation of especially always reporting to the police, to around cause interference, can adopt the method head it off of controlling liquid feeding prompting displaying time.As an embodiment, when liquid feeding information can be at Preset Time or at system boot or interval Preset Time show within a certain period of time.For example liquid feeding information can be in the set time of every day, as 10 demonstrations; Also can be within a certain period of time, for example in 1 minute, show, certain interval of time then, as 5 hours, then show etc.
Based on same inventive concept, the present invention also provides a kind of projector liquid cooling system liquid feeding and alarm time determining device, below in conjunction with accompanying drawing, the embodiment of apparatus of the present invention is described in detail.
As shown in Figure 4, Figure 5, a kind of projector liquid cooling system liquid feeding and alarm time determining device, comprising:
Be fixed on the vertical movement track 100 of tank for coolant 300 outer walls, if liquid pump rotating speed changes, liquid level detects platelet 200 and moves at described vertical movement track 100 according to definite displacement, obtains the first new detecting point that mobile rear each reflective photoelectric switch is corresponding, the second new detecting point;
The liquid level that is arranged on described vertical movement track 100 detects platelet 200, comprise reflective photoelectric switch, differential comparator 203, one of them reflective photoelectric switch 201 is positioned at the first detecting point default under the current rotating speed of liquid pump, another reflective photoelectric switch 202 is positioned at the second default detecting point lower than described the first detecting point, described differential comparator 203, for the height of liquid level relatively and new the first detecting point, new the second detecting point, determines whether to show corresponding liquid feeding information, warning information according to the result comparing.
Owing to being provided with two detecting points, the present invention's differential comparator 203 used is double passage differential comparer, for comparing separately the height of height, liquid level and the second detecting point of liquid level and the first detecting point.Differential comparator can be selected different port numbers according to the comparison item number arranging.
When liquid pump rotating speed changes, the height of liquid level is vertical change, and vertical movement track 100 can make described liquid level detection platelet 200 move vertically, guarantees the accuracy that liquid level detects.Tracks also can tilt, but after liquid level detects platelet 200 and moves, reflective photoelectric switch likely can not detect liquid surface level due to Angulation changes, or the liquid level detecting is not actual liquid level, and the degree of accuracy of liquid level detection is lower.Front end face and reflector due to reflective photoelectric switch need to remain in specialized range simultaneously, and as a preferred embodiment, reflective photoelectric switch should paste cooling tank wall as far as possible, guarantees the sensitivity detecting.Reflective photoelectric switch also can replace with other functionally similar level switches.Can be for rotating speed is the first detecting point, the second detecting point of determining for 0 o'clock under current rotating speed, the first detecting point, second of determining in the time of also can be for a concrete rotating speed is detected point.Wherein the first detecting point, the second detecting point can be determined according to the volatilization time of liquid coolant, interval time etc., user also as required setting example as the 3rd detecting point etc., liquid level is carried out to detection early warning in various degree.
The rotating speed of liquid pump is controlled, if rotating speed does not change, directly relatively liquid level and first is detected the height that point, second is detected point.As an embodiment, when liquid level is during higher than the first detecting point, put corresponding liquid feeding interface end 500 output low levels with the first detecting, put corresponding alarm interface end 500 output low levels with the second detecting; When liquid level is not during higher than the first detecting point, higher than the second detecting point, described liquid feeding interface end 500 output high level, described alarm interface end 500 output low levels, prompting liquid feeding; If liquid level is not during higher than the second detecting point, described liquid feeding interface end 500 is all exported high level, the too low alarm of liquid level with alarm interface end 500; If described liquid feeding interface end 500 is low level, described alarm interface end 500 is high level, and the system failure is reported to the police.Also can control and whether point out the too low alarm of liquid feeding or liquid level or the system failure to report to the police by the corresponding interface end output low level in addition.
If rotating speed changes, the liquid level of liquid coolant also can change.If reflective photoelectric switch is fixed, for the liquid of as much, what when liquid pump rotating speed is slower, liquid level raise is less, if now liquid level lower than the first detecting o'clock higher than the second detecting point; What when the rotating speed of liquid pump is very fast, liquid level raise is more, and now liquid level is just likely higher than two detecting points, and the liquid of as much is because the different testing results of liquid pump rotating speed will be different, makes correctly to judge the liquid feeding time difficulty that becomes.So will move described liquid level according to the variation of rotating speed, detect platelet, make the first detecting point that reflective photoelectric switch is corresponding new, the second new detecting point, and then compare again.
During rotation speed change, determine that the displacement that liquid level detection platelet 200 moves can have multiple way of realization, for example, as an embodiment, if current liquid level, higher than described the first detecting point, determines that according to formula H1=K1*V1 described liquid level detects the moving displacement H1 of platelet 200 on described vertical movement track 100; Wherein K1 is that definite liquid level changes and rotation speed change coefficient of relationship, and V1 is rotation speed change;
If current liquid level higher than described the second detecting point, determines that according to formula H2=K2*V2 described liquid level detects the moving displacement H2 of platelet 200 on described vertical movement track 100 lower than described the first detecting point; Wherein K2 is that definite liquid level changes and rotation speed change coefficient of relationship, and V2 is rotation speed change;
Wherein according to the rotating speed of measuring some liquid level of different time, change, adopt formula liquid level variation/rotation speed change Coefficient of determination K1, K2.
Because having influence on liquid level, how many meetings of liquid coolant change the relation with rotation speed change, so liquid level changes the coefficient of relationship with rotation speed change in the time of need to measuring liquid level differing heights.The type of liquid coolant and the size of cooling tank etc. also can have influence on the relation of liquid level variation and rotation speed change simultaneously, so need to remeasure coefficient of relationship between the two for dissimilar projector.
As an embodiment, as shown in Figure 4, can control the movement that liquid level detects platelet 200 by motor driver Driving Stepping Motor 400, making liquid level detect platelet 200 can accurately locate.
As an embodiment, projector's liquid cooling system liquid feeding and alarm time determining device can also comprise time regulator, after described differential comparator 203 is determined demonstration liquid feeding information or warning information, for recording liquid feeding prompt time or alarm time;
If liquid feeding prompt time and the alarm time of time regulator record differ the default time that is less than, show leakage warning information.
The liquid feeding prompt time of time regulator record and alarm time can be the time while showing the earliest, and the default time can be from the first detecting o'clock, to the second detecting, to put the random time of time used while being less than no leakage, such as 20 hours etc.
Reflective photoelectric switch is subject to liquid pump PWM(Pulse Width Modulation, pulse-length modulation) impact of signal, produce with PWM with spike frequently.For example in system of the present invention, liquid pump pwm signal frequency is 200Hz, and the width of spike is approximately 200us so.When opening refrigeration system, because refrigeration system electric current is larger, metal-oxide-semiconductor (Metal-Oxid-Semiconductor, metal-oxide semiconductor fieldeffect transistor) gauge tap has produced larger interference, cause power supply unstable, existing with disturbing pulse frequently, there is certain interference in reflective photoelectric switch output.Because the spike duration is not long, can adopt the method head it off of software filtering.As an embodiment, described differential comparator 203 can determine whether to show corresponding liquid feeding information, warning information according to the described comparative result of continuous preset times sampling, for example to described liquid feeding interface end and alarm interface end every 1ms once sampling, the constant judgement sampling of continuous 6 sampled values is effectively.
Liquid feeding information can show in the mode of pilot lamp, also can point out in the mode of alarm.Because liquid level is o'clock longer to the second detecting point time from the first detecting, if never have liquid feeding, liquid feeding information frequently shows, the situation of especially always reporting to the police, to around cause interference, can adopt the method head it off of controlling liquid feeding prompting displaying time.As an embodiment, when liquid feeding information can be at Preset Time or at system boot or interval Preset Time show within a certain period of time.For example liquid feeding information can be in the set time of every day, as 10 demonstrations; Also can be within a certain period of time, for example in 1 minute, show, certain interval of time then, as 5 hours, then show etc.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1.Yi Zhong projector liquid cooling system liquid feeding and alarm time are determined method, it is characterized in that, comprise step:
One of them reflective photoelectric switch that liquid level is detected to platelet is placed in the first detecting point default under the current rotating speed of liquid pump, and another reflective photoelectric switch is placed in the second default detecting point, and described the second detecting point is lower than described the first detecting point;
If liquid pump rotating speed changes, liquid level is detected to platelet and according to definite displacement, move, obtain the first new detecting point that mobile rear each reflective photoelectric switch is corresponding, the second new detecting point;
Relatively the height of liquid level and new the first detecting point, new the second detecting point, determines whether to show corresponding liquid feeding information, warning information according to the result comparing.
2. projector according to claim 1 liquid cooling system liquid feeding and alarm time are determined method, it is characterized in that, the step of determining liquid level detection platelet moving displacement comprises: if current liquid level, higher than described the first detecting point, determines that according to formula H1=K1*V1 described liquid level detects platelet moving displacement H1; Wherein K1 is that definite liquid level changes and rotation speed change coefficient of relationship, and V1 is rotation speed change;
If current liquid level higher than described the second detecting point, determines that according to formula H2=K2*V2 described liquid level detects platelet moving displacement H2 lower than described the first detecting point; Wherein K2 is that definite liquid level changes and rotation speed change coefficient of relationship, and V2 is rotation speed change;
The step of Coefficient of determination K1, K2 comprises: according to the rotating speed of measuring some liquid level of different time, change, adopt formula liquid level variation/rotation speed change Coefficient of determination K1, K2.
3. projector according to claim 1 liquid cooling system liquid feeding and alarm time are determined method, it is characterized in that, after showing the step of liquid feeding information, also comprise the step that records liquid feeding prompt time; After the step of display alarm information, also comprise the step that records alarm time;
If liquid feeding prompt time and the alarm time of record differ the default time that is less than, show leakage warning information.
4. projector according to claim 1 liquid cooling system liquid feeding and alarm time are determined method, it is characterized in that, according to the described comparative result of continuous preset times sampling, determine whether to show corresponding liquid feeding information, warning information.
5. according to projector's liquid cooling system liquid feeding and alarm time described in claim 1 to 4 any one, determine method, it is characterized in that, liquid feeding information during at Preset Time or at system boot or interval Preset Time show within a certain period of time.
6.Yi Zhong projector liquid cooling system liquid feeding and alarm time determining device, is characterized in that, comprising:
Be fixed on the vertical movement track of tank for coolant outer wall, if liquid pump rotating speed changes, liquid level detection platelet at described vertical movement rail moving, obtains the first new detecting point that mobile rear each reflective photoelectric switch is corresponding, the second new detecting point according to definite displacement;
The liquid level that is arranged on described vertical movement track detects platelet, comprise reflective photoelectric switch, differential comparator, one of them reflective photoelectric switch is positioned at the first detecting point default under the current rotating speed of liquid pump, another reflective photoelectric switch is positioned at the second default detecting point lower than described the first detecting point, described differential comparator, for the height of liquid level relatively and new the first detecting point, new the second detecting point, determines whether to show corresponding liquid feeding information, warning information according to the result comparing.
7. projector according to claim 6 liquid cooling system liquid feeding and alarm time determining device, it is characterized in that, if current liquid level, higher than described the first detecting point, determines that according to formula H1=K1*V1 described liquid level detects the moving displacement H1 of platelet on described vertical movement track; Wherein K1 is that definite liquid level changes and rotation speed change coefficient of relationship, and V1 is rotation speed change;
If current liquid level higher than described the second detecting point, determines that according to formula H2=K2*V2 described liquid level detects the moving displacement H2 of platelet on described vertical movement track lower than described the first detecting point; Wherein K2 is that definite liquid level changes and rotation speed change coefficient of relationship, and V2 is rotation speed change;
According to the rotating speed of measuring some liquid level of different time, change, adopt formula liquid level variation/rotation speed change Coefficient of determination K1, K2.
8. projector according to claim 6 liquid cooling system liquid feeding and alarm time determining device, it is characterized in that, also comprise time regulator, after described differential comparator is determined demonstration liquid feeding information or warning information, for recording liquid feeding prompt time or alarm time;
If liquid feeding prompt time and the alarm time of time regulator record differ the default time that is less than, show leakage warning information.
9. projector according to claim 6 liquid cooling system liquid feeding and alarm time determining device, is characterized in that, described differential comparator determines whether to show corresponding liquid feeding information, warning information according to the described comparative result of preset times sampling continuously.
10. according to projector's liquid cooling system liquid feeding and alarm time determining device described in claim 6-9 any one, it is characterized in that, liquid feeding information during at Preset Time or at system boot or interval Preset Time show within a certain period of time.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467731A (en) * | 2015-12-16 | 2016-04-06 | 深圳市帅映科技有限公司 | Heat management system of laser projector |
| CN110836710A (en) * | 2018-08-15 | 2020-02-25 | 北汽福田汽车股份有限公司 | Cooling liquid level detection method and device and vehicle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3471225A (en) * | 1966-12-05 | 1969-10-07 | Eastman Kodak Co | Automatic focusing motion picture projector |
| US4286464A (en) * | 1980-01-14 | 1981-09-01 | Technical Development Company | Optical fluid level monitor |
| DE19833766A1 (en) * | 1998-07-17 | 2000-01-20 | Ism Ingenieurbuero Fuer Spezia | Optical fluid level sensor for fluid in container |
| US20020124643A1 (en) * | 2001-03-09 | 2002-09-12 | Bruce Robinson | Flexible optical fiber remote level sensor |
| JP2004333757A (en) * | 2003-05-06 | 2004-11-25 | Seiko Epson Corp | Light source device and projection display device using the same |
| CN102829844A (en) * | 2012-08-28 | 2012-12-19 | 天津炫盛科技开发有限公司 | Coolant liquid level alarm device |
| CN202793526U (en) * | 2012-08-15 | 2013-03-13 | 柳州 | Liquid level sensing device and electrical equipment with water tank |
-
2013
- 2013-11-25 CN CN201310603700.5A patent/CN103605254B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3471225A (en) * | 1966-12-05 | 1969-10-07 | Eastman Kodak Co | Automatic focusing motion picture projector |
| US4286464A (en) * | 1980-01-14 | 1981-09-01 | Technical Development Company | Optical fluid level monitor |
| DE19833766A1 (en) * | 1998-07-17 | 2000-01-20 | Ism Ingenieurbuero Fuer Spezia | Optical fluid level sensor for fluid in container |
| US20020124643A1 (en) * | 2001-03-09 | 2002-09-12 | Bruce Robinson | Flexible optical fiber remote level sensor |
| JP2004333757A (en) * | 2003-05-06 | 2004-11-25 | Seiko Epson Corp | Light source device and projection display device using the same |
| CN202793526U (en) * | 2012-08-15 | 2013-03-13 | 柳州 | Liquid level sensing device and electrical equipment with water tank |
| CN102829844A (en) * | 2012-08-28 | 2012-12-19 | 天津炫盛科技开发有限公司 | Coolant liquid level alarm device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467731A (en) * | 2015-12-16 | 2016-04-06 | 深圳市帅映科技有限公司 | Heat management system of laser projector |
| CN110836710A (en) * | 2018-08-15 | 2020-02-25 | 北汽福田汽车股份有限公司 | Cooling liquid level detection method and device and vehicle |
| CN110836710B (en) * | 2018-08-15 | 2021-06-18 | 北汽福田汽车股份有限公司 | Cooling liquid level detection method and device and vehicle |
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| Publication number | Publication date |
|---|---|
| CN103605254B (en) | 2015-10-07 |
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