CN102298102B - Abnormity inspection system of cooling part of circuit - Google Patents
Abnormity inspection system of cooling part of circuit Download PDFInfo
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- CN102298102B CN102298102B CN201110114899.6A CN201110114899A CN102298102B CN 102298102 B CN102298102 B CN 102298102B CN 201110114899 A CN201110114899 A CN 201110114899A CN 102298102 B CN102298102 B CN 102298102B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
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Abstract
The invention provides an abnormity inspection system of the cooling part of a circuit. The circuit (1) has a heating component (2) and a cooling part cooling the heating component. The abnormity inspection system comprises a component temperature detection part (4) which detects the temperature of the heating component (2), a current consumption detection part (5) which detects the consumed current in the heating component (2), and an abnormity determination part (7) which determines the abnormity of the cooling part (3) based on the component temperature detected by the component temperature detection part (4) and the current consumption detected by the current consumption detection part (5).
Description
Technical field
The present invention relates to the follow-up for anomaly system of the cooling end of circuit.
Background technology
In circuit, use the cooling end as the large electronic unit of the heatings such as central operation treating apparatus (CPU) such as heating radiator (heat sink) or cooling fan, cooling heat pipe (heat pipe), amber ear note (Peltier) element.With heat radiator, be example when cooling end is described, Figure 12 represents to wait the mounting plane of electronic unit 31 that should be cooling without the state that is adjacent to obliquely and has installed rightly the heating radiator 32 that possesses heat radiator with respect to ceramic BGA encapsulation.In the situation that heating radiator 32 is in so appropriate installment state, the heat of electronic unit 31 is delivered to heating radiator 32 expeditiously, from heat radiator, dispels the heat expeditiously, and electronic unit 31 is cooled.In addition, although adhered by sticker 33 between heating radiator 32 and electronic unit 31, also there are silicone grease or conducting strip etc. between situation wherein.
On the other hand, exist as shown in figure 13, heating radiator 32 is because the excessive of sticker is fixed on situation on electronic unit 31 or as shown in figure 14 with not enough grade with the state tilting, the situation of fixed heat sink 32 under the thick state of the sticker of fixed heat sink 32.Its result, exists because the heat of electronic unit 31 is not delivered to the reduction of the cooling effect that heating radiator 32 causes or the problem that heating radiator 32 comes off from electronic unit 31 after product export because adhesion is bad etc. efficiently.In order to address this problem, during fabrication by the visual installment state that checks heating radiator 32, except labor intensive is taken, also lack accuracy.
In order to prevent such problem, as the means that check the installment state of cooling end, in Japanese kokai publication hei 5-223890 communique, recorded the invention of the device of heating radiator, the device of this heating radiator is characterised in that, in the heating radiator of installing, possesses the detecting unit that the adaptation of semiconductor device and radiator body is carried out to mechanical detection when aging (burn in) test of implementing semiconductor device.
In addition, as other example, the temperature separately of having recorded heating radiator when mensuration has flow through different electric current in TOHKEMY 2009-130223 communique detects the abnormal invention of cooling fan.In addition, two position set temperature detecting devices at heating radiator in TOHKEMY 2004-150777 communique and TOHKEMY 2005-327855 communique, have been recorded, by the temperature difference of these two positions and predetermined value being compared to detect the abnormal invention of cooling fan.In addition, in TOHKEMY 2006-294978 communique, recorded the abnormal invention that detects cooling end according to the detected value of single Temperature Detector and environment temperature.In addition, in TOHKEMY 2007-221908 communique, recorded the abnormal invention that detects cooling end according to the detected detected temperatures of measuring point at two positions on heating radiator.
But device complexity and the price recorded in Japanese kokai publication hei 5-223890 communique are high.And, although sometimes cause the installment state of heating radiator to change owing to shaking or clashing into after product export, be difficult to this device to bring into and use the on-the-spot of this electronic unit and check installment state.In addition, in the situation that using cooling fan as cooling end, owing to himself being the parts that drive by motor etc., so compare easily and break down with electronic unit.
Summary of the invention
In one embodiment, providing can be with the accurate and easy method follow-up for anomaly system that bad or fault etc. checks extremely to the installation of the cooling end of circuit in the present invention.
In first method of the present invention, a kind of follow-up for anomaly system that possesses heat generating components and this heat generating components is carried out to the described cooling end in the circuit of cooling cooling end is provided, wherein possess: part temperatures test section, it detects the temperature of described heat generating components; Current sinking test section, it detects the current sinking in described heat generating components; And abnormality juding portion, it is according to judging the abnormal of described cooling end by the detected part temperatures of described part temperatures test section with by the detected current sinking of described current sinking test section.
In second method of the present invention, a kind of follow-up for anomaly system of cooling end is provided, wherein, described part temperatures is being made as to T, described current sinking is made as to I, the limit part temperatures of predetermined described part temperatures is made as to Tmax, the limit current sinking of predetermined described heat generating components is made as to Imax, when the limiting ambient temperature of predetermined this follow-up for anomaly system is made as to Tamax, when having met the relational expression of T > (Tmax-Tamax) * I/Imax+Tamax or I > Imax, described abnormality juding portion is judged to be extremely.
That is,, in first method of the present invention and second method, play and can carry out the abnormal effects such as the bad or fault of the installation of cooling end of testing circuit with accurate and easy method.In addition,, because these inventions are carried out abnormal judgement based on certain part temperatures and current sinking constantly, so also play, can carry out in the short time effect of this judgement.
In Third Way of the present invention, a kind of follow-up for anomaly system that possesses heat generating components and this heat generating components is carried out to the described cooling end in the circuit of cooling cooling end is provided, wherein possess: part temperatures test section, it detects the temperature of described heat generating components; And abnormality juding portion, it is according to judging the abnormal of described cooling end by the detected second component temperature of described part temperatures test section after by the detected first component temperature of described part temperatures test section and the execution at described circuit operation before the execution of the circuit operation described heat generating components is heated up.
In cubic formula of the present invention, a kind of follow-up for anomaly system of cooling end is provided, wherein, described first component temperature is being made as to T1, when described second component temperature is made as to T2, in the function f that represents the normal and abnormal border of predetermined cooling end: while having met the relational expression of T2 > f (T1) in T2=f (T1), described abnormality juding portion is judged to be extremely.
That is, in Third Way of the present invention and cubic formula, play and can carry out the abnormal effects such as the bad or fault of the installation of cooling end of testing circuit with accurate and easy method.In addition, because these inventions are only carried out abnormal judgement based on part temperatures, so even the temperature of its position of temperature also can, also play and can carry out with simpler structure the effect of this judgement.
In the 5th mode of the present invention, a kind of follow-up for anomaly system that possesses heat generating components and this heat generating components is carried out to the described cooling end in the circuit of cooling cooling end is provided, wherein possess: current sinking test section, it detects the current sinking in described heat generating components; And abnormality juding portion, it is according to judging the abnormal of described cooling end by detected the second current sinking of described current sinking test section after by detected the first current sinking of described current sinking test section and the execution at described circuit operation before the execution of the circuit operation described heat generating components is heated up.
In the 6th mode of the present invention, a kind of follow-up for anomaly system of cooling end is provided, wherein, described the first current sinking is being made as to I1, when described the second current sinking is made as to I2, while having met the relational expression of I2 > g (I1) in the function g:I2=g (I1) on normal and abnormal border that represents predetermined cooling end, described abnormality juding portion is judged to be extremely.
That is, in the 5th mode of the present invention and the 6th mode, play and can carry out the abnormal effects such as the bad or fault of the installation of cooling end of testing circuit with accurate and easy method.In addition,, because these inventions are only carried out abnormal judgement based on current sinking, so play, do not need to detect each several part temperature and just can carry out with simpler structure the effect of this judgement.
In the 7th mode of the present invention, a kind of follow-up for anomaly system of cooling end is provided, wherein also possess: environment temperature test section, it detects the environment temperature of this follow-up for anomaly system, and described abnormality juding portion is further according to judged the abnormal of described cooling end by the detected environment temperature of this environment temperature test section.
That is,, in the 7th mode of the present invention, owing to further considering environment temperature when judging, therefore play the effect that can carry out more high-precision abnormal judgement.
In the formula of all directions of the present invention, a kind of follow-up for anomaly system of cooling end is provided, wherein also possess: calibration cell, it can be to hold this follow-up for anomaly system by this follow-up for anomaly system held in the mode of predetermined temperature.
That is, of the present invention the, from all directions in formula, can under identical all the time environment temperature, carry out abnormal judgement, therefore play with under condition fully being proofreaied and correct and compare the effect that can carry out more high-precision abnormal judgement.In addition, because environment temperature is constant, thus need not in this follow-up for anomaly system self, be provided for detecting the unit of environment temperature, and can create and do not rely on the time of inspection or the stable inspection environment in place.
In the 9th mode of the present invention, a kind of follow-up for anomaly system of cooling end is provided, wherein, in described abnormality juding portion, be judged to be when abnormal, abnormal show is notified on picture or with sound, or recorded result of determination, or change described heat generating components into power down mode, or cut off the power supply of described heat generating components, or notify to the system of carrying out abnormal supervision.
; in the 9th mode of the present invention; in system acting after dispatching from the factory; by picture disply or sound, to user or operator, notify extremely, or record result of determination, or be converted to power down mode; or cut off the electricity supply; or to carrying out the system of abnormal supervision, notify, play thus replacing/repairing that can impel cooling end etc., can prevent in advance the effect of the faults such as damage of the heat generating components that causes because of heating.Therefore, the 9th mode of the present invention can also be as the system of clashing into or the installment state aging and cooling end that causes changes or fault etc. is carried out autodiagnosis is applied.In addition, also effective in the test of the present invention before dispatching from the factory.
Below, with the record of the preferred embodiment of the present invention, can further fully understand the present invention with reference to the accompanying drawings.
Accompanying drawing explanation
Fig. 1 means the block diagram of summary of follow-up for anomaly system of the cooling end of a kind of form of the present invention.
Fig. 2 means the figure of concrete structure of follow-up for anomaly system of the cooling end of a kind of form of the present invention.
Fig. 3 means the figure of another concrete structure of follow-up for anomaly system of the cooling end of a kind of form of the present invention.
Fig. 4 means the figure of the first embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.
Fig. 5 means the figure of the second embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.
Fig. 6 means the figure of the 3rd embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.
Fig. 7 means the figure of the 4th embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.
Fig. 8 means the figure of the 5th embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.
Fig. 9 means the figure of the 6th embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.
Figure 10 means the figure of the 7th embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.
Figure 11 is the process flow diagram that the abnormality juding in the second embodiment is processed.
Figure 12 means the figure of the normal installment state of heating radiator.
Figure 13 means the figure of the abnormal installment state of heating radiator.
Figure 14 means the figure of the abnormal installment state of heating radiator.
Embodiment
Below, with reference to accompanying drawing, explain embodiments of the present invention.
Fig. 1 means the block diagram of summary of follow-up for anomaly system of the cooling end of a kind of form of the present invention.Follow-up for anomaly system has circuit 1, and heat generating components 2 is installed on circuit 1, is provided with heat generating components 2 is carried out to cooling cooling end 3 on heat generating components 2.The heat generating components here is generally mounted in the king-sized parts that generate heat in the electronic unit in circuit, has enumerated for example central operation treating apparatus (CPU).In addition, so-called cooling end, be that heat in order to make to produce in heat generating components is released to that circuit is external to carry out coolingly, the parts that conventionally contact or closely install with heat generating components, have for example enumerated heating radiator or cooling fan, cooling heat pipe, Peltier's element.
In addition, the follow-up for anomaly system of a kind of form of the present invention also has part temperatures test section 4 and current sinking test section 5.Part temperatures test section 4 has the function of the temperature that detects heat generating components 2, and current sinking test section 5 has the function that the current sinking in heat generating components 2 or the parts group that comprises heat generating components 2 is detected.In addition, follow-up for anomaly system can be also some structures with part temperatures test section 4 and current sinking test section 5.And then the follow-up for anomaly system of a kind of form of the present invention, also can be in the position of effect away to not being subject to the temperature variation of heat generating components 2, have for measuring the environment temperature test section 6 of temperature of environment of the surrounding of this follow-up for anomaly system.
In addition, the follow-up for anomaly system of a kind of form of the present invention has abnormality juding portion 7.Abnormality juding portion 7 for example also can possess via the interconnective CPU of bidirectional bus and ROM (ROM (read-only memory)) and RAM (random access memory), and then possesses nonvolatile memory.In addition, the CPU possessing in heat generating components 2 and abnormality juding portion 7 also can be identical.
Abnormality juding portion 7 has according to by the detected part temperatures of part temperatures test section 4 with by one party or the both sides of current sinking test section 5 detected current sinkings, judges the abnormal functions such as the bad or fault of the installation of cooling end 3.Abnormality juding portion 7, when carrying out abnormal judgement, also can further consider by the detected environment temperature of environment temperature test section 6.
And then the follow-up for anomaly system of a kind of form of the present invention can have abnormal results efferent 8, this abnormal results efferent 8 in the situation that the result that abnormality juding portion 7 is judged as abnormal, by the output of this result.Abnormal results efferent 8 lists such as the display that warning is carried out to picture disply, with sound, carrys out the loudspeaker of ring warning tones, the nonvolatile memory of recording exceptional, power control unit that the electric power of the circuit 1 by follow-up for anomaly system management is controlled etc.By being given a warning by display or loudspeaker, user or operator can detect extremely.In addition, by power control unit output abnormality result, the power supply etc. that can take that heat generating components 2 is converted to power down mode or cut off heat generating components 2 prevents overheated measure.The system of in addition, carrying out abnormal supervision for example also can be carried out abnormal notice to outside system.
Then, the concrete structure of follow-up for anomaly system of the cooling end of a kind of form of the present invention is described with reference to Fig. 2.In Fig. 2, use heating radiator as cooling end.Heat generating components 12 is installed on circuit 11, on heat generating components 12, is provided with the heat of generation is discharged to outside heating radiator 13.By heating radiator 13, be discharged to outside heat, by cooling fan 14, be released to the outside of the cabinet that for example holds circuit 11.
In addition, in order to detect the temperature of heat generating components 12, part temperatures sensor 15 is configured near heat generating components, and then, away to not being subject to the place of impact of the temperature variation of heat generating components 12, configured for measuring the ambient temp sensor 16 of temperature of the surrounding environment of this follow-up for anomaly system.And then, on circuit 11, connect power supply 17, by galvanometer 18, detect the electric current flowing through in circuit 11.Its result, becomes the structure of the current sinking that calculates heat generating components 12.
Then, with reference to Fig. 3, another concrete structure of the follow-up for anomaly system of the cooling end of a kind of form of the present invention is described.In Fig. 3, use heating radiator as cooling end.Heat generating components 22 is installed on circuit 21, on heat generating components 22, is provided with the heat of generation is released to outside heating radiator 23.By heating radiator 23, be released to outside heat, by cooling fan 24, be released to the outside of the cabinet that for example holds circuit 21.
In addition, in order to detect the temperature of heat generating components 22, part temperatures sensor 25 is installed on circuit 21, and then, away to not being subject to have installed on the circuit 21 of effect of temperature variation of heat generating components 22 for measuring the ambient temp sensor 26 of temperature of the surrounding environment of this follow-up for anomaly system.And then, on circuit 21, connect power supply 27, by galvanometer 28, detect the electric current flowing through in circuit 11.Its result, becomes the structure of the current sinking that calculates heat generating components 22.
In addition, in Fig. 2 and Fig. 3, as temperature sensor, also can use infrared temperature sensor or thermopair etc., the unit as detect the electric current flowing through in circuit also can connect current probe on power supply.In addition, in the structure shown in Fig. 2 and Fig. 3, be to represent for example, the structure of the value of not used in the abnormal judgement for detection of the cooling end representing by some embodiments below, in this embodiment optional structure.For example,, in the 1st embodiment shown in Fig. 4, owing to not considering environment temperature in the abnormal judgement of cooling end, so the optional structure of ambient temp sensor 26 of the ambient temp sensor 16 of Fig. 2 and Fig. 3.
Below, according to some embodiments, illustrate in the abnormality juding portion 7 illustrated with reference to Fig. 1 for judging the abnormal method of cooling end.
Fig. 4 means the figure of the first embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.Transverse axis represents the current sinking I by the detected heat generating components 2 of current sinking test section 5, and the longitudinal axis represents by the temperature of the detected heat generating components 2 of part temperatures test section 4, is part temperatures T.And then, by the high temperature of the limit of the part temperatures T predetermining according to product specification etc., be that limit part temperatures is made as Tmax, by the ultimate value of the current sinking I predetermining according to product specification etc., be that limit current sinking is made as Imax, by the high temperature of the limit of the environment temperature of this follow-up for anomaly system predetermining according to product specification etc., be that limiting ambient temperature is made as Tamax.Limiting ambient temperature Tamax is lower than limit part temperatures Tmax.
Now, when when testing in advance the normal and abnormal result of drawing cooling end in the coordinate system representing at Fig. 4, its boundary line can be carried out to the following formula of first-order approximation (1) and represent.In addition, formula (1) represents with line L1 in Fig. 4.
T＝(Tmax-Tamax)×I/Imax+Tamax ...(1)
In addition, because determined in advance in product specification etc., so also become boundary line about the following formula (2) of limit current sinking Imax.
I＝Imax ...(2)
Therefore, the abnormality juding portion 7 of present embodiment, is meeting
T＞(Tmax-Tamax)×I/Imax+Tamax ...(3)
Or
I＞Imax ...(4)
Relational expression time, be judged to be abnormal.
That is,, about formula (3), although in the situation that the little part temperatures of current sinking is high, can be judged as at cooling end and produces extremely.About formula (4), due to the current sinking value of overstepping the extreme limit, so can be judged as, produce extremely.In addition, the region representation that illustrates with oblique line in Fig. 4 and illustrate with " OK " is judged to be the normal region of cooling end.In region beyond it, with the region representation that " NG " represents, be judged to be the abnormal region of cooling end.These information are stored in ROM.
Fig. 5 means the figure of the second embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.In the present embodiment, carrying out predetermined circuit operation makes heat generating components heat up wittingly.By part temperatures test section, detect the part temperatures before and after this, and relatively these are worth, and carry out thus abnormal judgement.In Fig. 5, transverse axis represents the part temperatures T1 before predetermined circuit operation is carried out, and the longitudinal axis represents the part temperatures T2 after predetermined circuit operation is carried out.In addition, so-called predetermined circuit operation, such as the test of the function of checking circuit, be that function test etc. is suitable with it.
In this case, when when testing in advance the normal and abnormal result of drawing cooling end in the coordinate system representing at Fig. 5, first-order approximation can be carried out in its boundary line and the formula (5) that represents by function f represents.In addition, formula (5) represents with line L2 in Fig. 5.
T2＝f(T1) ...(5)
Therefore, the abnormality juding portion 7 of present embodiment, is meeting
T2＞f(T1) ...(6)
Relational expression time, be judged to be abnormal.
That is, in the normal situation of cooling end, the heat generating components after heating up by predetermined circuit operation is cooled by cooling end, can be judged as not carry out coolingly normally in the situation that meeting formula (6), at cooling end, has produced extremely.In addition, the region that represents with oblique line in Fig. 5 and represent with " OK ", represents to be judged to be the normal region of cooling end.The region representing with " NG " in region beyond it, represents to be judged to be the abnormal region of cooling end.These information are stored in ROM.
Fig. 6 means the figure of the 3rd embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.In the present embodiment, carrying out predetermined circuit operation makes heat generating components heat up wittingly.By current sinking test section, detect the current sinking before and after this, and these values are compared, carry out thus abnormal judgement.In Fig. 6, transverse axis represents the current sinking 11 before the execution of predetermined circuit operation, and the longitudinal axis represents the current sinking I2 after the execution of predetermined circuit operation.In addition, so-called predetermined circuit operation, such as the test of the function of checking circuit, be that function test etc. is suitable with it.
In this case, when in advance when testing the normal and abnormal result of drawing cooling end in the coordinate system representing at Fig. 6, its boundary line can be carried out to first-order approximation and the formula (7) that represents with function g represents.In addition, formula (7) represents with line L2 in Fig. 5.
I2＝g(I1) ...(7)
Therefore, the abnormality juding portion 7 of present embodiment, is meeting
I2＞g(I1) ...(8)
Relational expression time, be judged to be abnormal.
That is,, when carrying out predetermined circuit operation, heat generating components heats up, follow it to rise, leakage current also increases, but in the normal situation of cooling end, heat generating components after heating up by predetermined circuit operation is cooled by cooling end, and leakage current reduces, and current sinking I2 also reduces.But, in the situation that meeting formula (8), can be judged as heat generating components and not carry out coolingly normally, at cooling end, produced extremely.In addition, the region representation that represents with oblique line in Fig. 6 and represent with " OK " is judged to be the normal region of cooling end.The region representation representing with " NG " in region beyond it is judged to be the abnormal region of cooling end.These information are stored in ROM.
Fig. 7 means the figure of the 4th embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.In the present embodiment, in the first embodiment representing in Fig. 4, further by considering that the environment temperature of this follow-up for anomaly system carries out abnormal more accurately judgement.In Fig. 7, transverse axis represents by the current sinking I of the detected heat generating components 2 of current sinking test section 5, and the longitudinal axis represents by the temperature of the detected heat generating components 2 of part temperatures test section 4, is part temperatures T.And then, by the high temperature of the limit of the part temperatures T predetermining according to product specification etc., be that limit part temperatures is made as Tmax, by the ultimate value of the current sinking I predetermining according to product specification etc., be that limit current sinking is made as Imax, by the high temperature of the limit of the environment temperature of this follow-up for anomaly system predetermining according to product specification etc., be that limiting ambient temperature is made as Tamax, will be made as Ta by the detected environment temperature of environment temperature test section 6.Limiting ambient temperature Tamax is lower than limit part temperatures Tmax, and environment temperature Ta is lower than limiting ambient temperature Tamax.
In this case, when by testing in advance, while drawing the normal and abnormal result of cooling end in the coordinate system representing at Fig. 7, its boundary line can be carried out to first-order approximation and represent by following formula (9).In addition, formula (9) represents with line L4 in Fig. 7.
T＝(Tmax-Tamax)×I/Imax+Ta ...(9)
In addition, because determined in advance in product specification etc., so also become boundary line about the following formula (10) of limit current sinking Imax.
I＝Imax ...(10)
Therefore, the abnormality juding portion 7 of present embodiment is meeting
T＞(Tmax-Tamax)×I/Imax+Ta ...(11)
Or
I＞Imax ...(12)
Relational expression time, be judged to be abnormal.
That is,, about formula (11), although in the situation that the little part temperatures of current sinking is high, can be judged as in cooling end and produces extremely.About formula (12), because current sinking has surpassed ultimate value, therefore can be judged as and produce extremely.In addition, the region representation that represents with oblique line in Fig. 7 and represent with " OK " is judged to be the normal region of cooling end.The region representation representing with " NG " in region beyond it is judged to be the abnormal region of cooling end.These information are stored in ROM.
If Fig. 4 and Fig. 7 are compared, in the 4th embodiment representing, be judged to be abnormal region and become large in Fig. 7.That is,, by considering environment temperature, can carry out more high-precision abnormal judgement.
Fig. 8 means the figure of the 5th embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.Present embodiment, in the calibration cell that the mode of the temperature that in the 4th embodiment representing at Fig. 7, follow-up for anomaly system is contained in to remain predetermined forms, and is made as the constant abnormal judgement of carrying out all the time by the environment temperature of circuit.In Fig. 8, transverse axis represents the current sinking I by the detected heat generating components 2 of current sinking test section 5, and the longitudinal axis represents by the temperature of the detected heat generating components 2 of part temperatures test section 4, is part temperatures T.And then, by the high temperature of the limit of the part temperatures T predetermining according to product specification etc., be that limit part temperatures is made as Tmax, by the ultimate value of the current sinking I predetermining according to product specification etc., be that limit current sinking is made as Imax, by the high temperature of the limit of the environment temperature of this follow-up for anomaly system predetermining according to product specification etc., be that limiting ambient temperature is made as Tamax, by being maintained constant environment temperature, be made as Tafix.Limiting ambient temperature Tamax is lower than limit part temperatures Tmax, and environment temperature Tafix is lower than limiting ambient temperature Tamax.
In this case, when when testing in advance the normal and abnormal result of drawing cooling end in the coordinate system representing at Fig. 8, its boundary line can be carried out to first-order approximation and represent by following formula (13).In addition, formula (13) represents with line L5 in Fig. 8.
T＝(Tmax-Tamax)×I/Imax+Tafix ...(13)
In addition, because scheduled decision in product specification etc., so also become boundary line about the following formula (14) of limit current sinking Imax.
I＝Imax ...(14)
Therefore, the abnormality juding portion 7 of present embodiment, is meeting
T＞(Tmax-Tamax)×I/Imax+Tafix ...(15)
Or
I > Imax ... in situation (16), is judged to be abnormal.
That is, about formula (15), although in the situation that the little and part temperatures of current sinking is high, can be judged as at cooling end and have produced extremely.About formula (16), due to the current sinking value of overstepping the extreme limit, so can be judged as, produce extremely.In addition, the region representation that illustrates with oblique line in Fig. 8 and illustrate with " OK " is judged to be the normal region of cooling end.The region representation illustrating with " NG " in region beyond it is judged to be the abnormal region of cooling end.These information are stored in ROM.
If comparison diagram 4 and Fig. 8, be judged to be abnormal region and become large in the 5th embodiment representing in Fig. 8.That is, by consideration environment temperature, can carry out the abnormal judgement that precision is higher.And then, because environment temperature is constant, so there is no need to be provided for to detect the unit of environment temperature in this follow-up for anomaly system self, just can creates and do not rely on the time of inspection or the stable inspection environment in place.
Fig. 9 means the figure of the 6th embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.In the present embodiment, in the second embodiment representing at Fig. 5, further by the environment temperature of consideration circuit, carry out abnormal more accurately judgement.In the present embodiment, carrying out predetermined circuit operation makes heat generating components heat up wittingly.By part temperatures test section, detect the part temperatures before and after this, by relatively these are worth to carry out abnormal judgement.In Fig. 9, transverse axis (X-axis) represents the part temperatures T1 before the execution of predetermined circuit operation, and the longitudinal axis (Y-axis) represents the part temperatures T2 after the execution of predetermined circuit operation.And then, the Z axis of increase vertical direction, Z axis is as passing through the detected environment temperature Ta of environment temperature test section 6.In addition, so-called predetermined circuit operation, is that function test etc. is suitable with it such as the test of the function for checking circuit.
Now, when when testing in advance the normal and abnormal result of drawing cooling end in the three-dimensional system of coordinate representing at Fig. 9, its border can be similar to and by planar S 1, be represented in Fig. 9 by plane.
Therefore, the abnormality juding portion 7 of present embodiment, in the coordinate system shown in Fig. 9 by detected part temperatures T1, T2 and environment temperature Ta and definite point in the area of space being marked off by planar S 1 when not comprising the region of a side of initial point, be judged to be abnormal.
That is, in the normal situation of cooling end, the heat generating components after heating up by predetermined circuit operation is cooled by cooling end, and part temperatures T2 reduces.But, by detected part temperatures T1, T2 and the determined point of environment temperature Ta not in the situation that in the region of the initial point side being marked off by boundary plane S1, can be judged as and not carry out the cooling normally of heat generating components, in cooling end, produce abnormal.In addition, the region of a side that represents with the oblique line that comprises initial point in Fig. 9 and represent with " OK ", represents to be judged to be the normal region of cooling end.The region representation representing with " NG " in area of space beyond it is judged to be the abnormal region of cooling end.These information are stored in ROM.
Figure 10 means the figure of the 7th embodiment of follow-up for anomaly system of the cooling end of a kind of form of the present invention.In the present embodiment, in the 3rd embodiment representing at Fig. 6, further by the environment temperature of consideration circuit, carry out abnormal more accurately judgement.In the present embodiment, carrying out predetermined circuit operation makes heat generating components heat up wittingly.By current sinking test section, detect the current sinking before and after this, by relatively these are worth to carry out abnormal judgement.In Figure 10, transverse axis (X-axis) represents to carry out the current sinking I1 before predetermined circuit operation, and the longitudinal axis (Y-axis) represents to carry out the current sinking I2 after predetermined circuit operation.And then, the Z axis of increase vertical direction, Z axis is made as by the detected environment temperature Ta of environment temperature test section 6.In addition, so-called predetermined circuit operation, is that function test etc. is suitable with it such as the test of the function of checking circuit.
In this case, when when testing in advance the normal and abnormal result of drawing cooling end in the three-dimensional system of coordinate representing at Figure 10, its border can be similar to by plane, in Figure 10, by planar S 2, represents.
Therefore, the abnormality juding portion 7 of present embodiment, in the coordinate system shown in Figure 10 by detected current sinking I1, I2 and environment temperature Ta and in the area of space of definite point in being marked off by planar S 2 do not comprise the region of initial point one side time, be judged to be abnormal.
That is,, if carry out predetermined circuit operation, heat generating components heats up, although be accompanied by this temperature rising leakage current, also increase, in the normal situation of cooling end, the heat generating components heating up by predetermined circuit operation is cooled by cooling end, leakage current reduces, and current sinking I2 also reduces.But, in the situation that be not present in the region of the initial point side being marked off by boundary plane S2 by current sinking I1, I2 and the determined point of environment temperature Ta, can be judged as and not carry out the cooling normally of heat generating components, in cooling end, produce abnormal.In addition, in Figure 10, comprise that initial point represents with oblique line and the region representation of the side that represents with " OK " is judged to be the normal region of cooling end.The region representation representing with " NG " in area of space beyond it is judged to be the abnormal region of cooling end.These information are stored in ROM.
Compare with the situation of not considering the environment temperature of circuit, the 6th embodiment shown in Fig. 9 and Figure 10 and the 7th embodiment can carry out the abnormal judgement that precision is higher.And then, also the follow-up for anomaly system in these embodiments can be contained in above-mentioned calibration cell, environment temperature is made as to the constant abnormal judgement of carrying out all the time.Now, there is no need to be provided for detecting the unit of environment temperature in this follow-up for anomaly system self, can create and not rely on the time of inspection or the stable inspection environment in place.
Finally, the process flow diagram of with reference to Figure 11, the abnormality juding of carrying out in the abnormality juding portion in the second embodiment being processed describes.This processing is carried out as the routine of carrying out in the time will carrying out the inspection of cooling end.In addition, also can be used as the routine automatically performing with the time interval predetermining by abnormality juding portion 7 carries out.In addition, the flow process of processing for the abnormality juding of other embodiments, if those skilled in the art can easily expect according to the process flow diagram representing in Figure 11.
When with reference to Figure 11, read in unit temperature T 1 in step 101 first at the beginning.Then, in step 102, carry out predetermined circuit operation.Then, read in unit temperature T 2 in step 103.Then, in step 104, determine whether the relational expression that meets the T2 > f (T1) reading in from ROM.In the situation that meeting this relational expression, think that cooling end is abnormal, advance to step 105, carry out finishing routine after the output of abnormal results.On the other hand, in step 104, in the situation that not meeting above-mentioned relation formula, think that cooling end is normal, finish routine.
Above-mentioned embodiment, according to by testing in advance the normal and abnormal result of the cooling end obtaining, is similar to its border by straight line or plane, but can certainly be similar to by curve or curved surface.In addition, in the above-described embodiment, also the part temperatures by the detected heat generating components of part temperatures test section can be replaced near temperature heat generating components.
Although the present invention has been carried out to detailed discussion according to specific embodiment, those skilled in the art also can carry out various changes, correction etc. in the situation that do not depart from scope and the thought of request patent protection of the present invention.
Claims (1)
1. possess heat generating components and this heat generating components carried out to the follow-up for anomaly system of the described cooling end in the circuit of cooling cooling end, it is characterized in that possessing:
Part temperatures test section, it detects the temperature of described heat generating components;
Current sinking test section, it detects the current sinking in described heat generating components; And
Abnormality juding portion, it is according to judging the abnormal of described cooling end by the detected part temperatures of described part temperatures test section with by the detected current sinking of described current sinking test section;
Wherein, described part temperatures is being made as to T, described current sinking is made as to I, the limit part temperatures of predetermined described part temperatures is made as to Tmax, the limit current sinking of predetermined described heat generating components is made as to Imax, when the limiting ambient temperature of predetermined this follow-up for anomaly system is made as to Tamax, when having met the relational expression of T> (Tmax-Tamax) * I/Imax+Tamax, described abnormality juding portion is judged to be extremely.
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| JP2010125904A JP4891423B2 (en) | 2010-06-01 | 2010-06-01 | Abnormality inspection system for cooling part of electronic circuit |
| JP2010-125904 | 2010-06-01 |
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| JP6564594B2 (en) * | 2015-03-26 | 2019-08-21 | 株式会社フジクラ | Light source device |
| CN105320180B (en) * | 2015-11-11 | 2018-02-27 | 珠海格力电器股份有限公司 | Shutdown control method and device for cooling equipment |
| DE102015225909A1 (en) * | 2015-12-18 | 2017-06-22 | Zf Friedrichshafen Ag | A method and apparatus for detecting aging of a power electronic device and power electronic system comprising a semiconductor device |
| CN106055457B (en) * | 2016-07-30 | 2019-01-08 | 北京海杭通讯科技有限公司 | A kind of method for detecting and device of the improper heating of Intelligent hand-hold equipment |
| CN108414861B (en) * | 2018-03-07 | 2020-10-02 | 宁波弘讯科技股份有限公司 | Electric heating fault self-checking method, device and system and computer readable storage medium |
| CN109341747A (en) * | 2018-08-14 | 2019-02-15 | 珠海格力电器股份有限公司 | Method and device for judging whether screw is tightened or not and storage medium |
| CN109933169A (en) * | 2019-02-21 | 2019-06-25 | 深圳康佳电子科技有限公司 | A kind of chip and radiator detection processing method, system and storage medium |
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| JP4891423B2 (en) | 2012-03-07 |
| CN102298102A (en) | 2011-12-28 |
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