CN116954284A - Method, device, equipment and storage medium for controlling cooling time of test box - Google Patents
Method, device, equipment and storage medium for controlling cooling time of test box Download PDFInfo
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Abstract
The invention discloses a cooling time control method of a test box. The method comprises the following steps: acquiring preset initial temperature, target temperature and expected cooling time; determining a total cooling range according to a preset initial temperature and a target temperature, and dividing the total cooling range into n sections of target cooling ranges; calculating opening data of the pulse electromagnetic valve in the test box in each target cooling range based on a preset formula according to the preset initial temperature, the target temperature and the target cooling range; and calculating the rotation speed of the evaporator fan in each target cooling range based on a preset formula according to the opening data of the pulse electromagnetic valve. According to the technical scheme, the temperature reduction time control of the nonlinear temperature reduction operation of the test box provided with the pulse electromagnetic valve can be realized, namely, the temperature reduction time of the test box can be controlled, and the control accuracy of the temperature reduction time when the test box is subjected to the temperature reduction operation is improved.
Description
Technical Field
The invention relates to the field of time controllability, in particular to a temperature reduction time control method, device, equipment and medium of a test box.
Background
With the increasing progress of life and technology, the requirements on the reliability of products are higher and higher. In many fields, it is necessary to test the properties of products or parts, such as reliability, material stress changes, and material property changes, during a period from high temperature to low temperature.
In the prior art, a test chamber is typically used for either linear or nonlinear cooling operations.
The inventors have found that the following problems exist in the prior art in the process of implementing the present invention: the test chamber in the prior art can be controlled according to the linear cooling time, for example, the temperature is linearly cooled from 85 ℃ to-55 ℃ at the speed of 10 ℃/min, and then the cooling time is 14min. However, for nonlinear cooling, the cooling time is generally uncontrollable according to the maximum capacity of the test box, and is generally smaller than the required cooling time, so that the accurate judgment of the reliability of products or parts is greatly affected.
Disclosure of Invention
The invention provides a cooling time control method, device and equipment for a test box and a storage medium, which can solve the problem that the cooling time of the test box is uncontrollable when nonlinear cooling operation is realized in the prior art.
In a first aspect, the present invention provides a method for controlling cooling time of a test chamber, the method comprising:
Acquiring preset initial temperature, target temperature and expected cooling time;
determining a total cooling range according to a preset initial temperature and a target temperature, and dividing the total cooling range into n sections of target cooling ranges;
calculating opening data of the pulse electromagnetic valve in the test box in each target cooling range based on a preset formula according to the preset initial temperature, the target temperature and the target cooling range;
and calculating the rotation speed of the evaporator fan in each target cooling range based on a preset formula according to the opening data of the pulse electromagnetic valve.
In a second aspect, the present invention provides a temperature reduction time control device for a test chamber, the device comprising:
the data acquisition module is used for acquiring preset initial temperature, target temperature and expected cooling time;
the cooling range segmentation module is used for determining a total cooling range according to a preset initial temperature and a target temperature and segmenting the total cooling range into n sections of target cooling ranges;
the opening data calculation module is used for calculating opening data of the pulse electromagnetic valve in the test box in each target cooling range based on a preset formula according to the preset initial temperature, the target temperature and the target cooling range;
And the fan rotating speed calculating module is used for calculating the rotating speed of the evaporator fan in each target cooling range based on a preset formula according to the opening data of the pulse electromagnetic valve.
In a third aspect, the present invention provides an electronic device, including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of controlling the cool down time of a test chamber according to any one of the embodiments of the present invention.
In a fourth aspect, the present invention provides a computer readable storage medium storing computer instructions for causing a processor to execute a method for controlling cooling time of a test chamber according to any one of the embodiments of the present invention.
According to the technical scheme, the total cooling range is determined according to the preset initial temperature, the target temperature and the expected cooling time, the total cooling range is divided into n sections of target cooling ranges, opening data of the pulse electromagnetic valve in the test box in each target cooling range are calculated according to the preset initial temperature, the target temperature and the target cooling range and based on a preset formula, and finally the rotating speed of the evaporator fan in each target cooling range is calculated according to each opening data of the pulse electromagnetic valve and based on the preset formula, so that the problem that the cooling time of the test box is uncontrollable when the nonlinear cooling operation is realized in the prior art is solved, the cooling time control of the nonlinear cooling operation of the test box is realized, namely the cooling time control of the test box is realized, and the control accuracy of the cooling time when the test box is subjected to the cooling operation is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for controlling cooling time of a test chamber according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a method for controlling cooling time of a test chamber according to a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a cooling time control device for a test chamber according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device for implementing a cooling time control method of a test chamber according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a flowchart of a method for controlling cooling time of a test chamber according to an embodiment of the present invention, where the method may be performed by a cooling time control device of the test chamber, where the cooling time control device of the test chamber may be implemented in hardware and/or software, and the cooling time control device of the test chamber may be configured in a terminal or a server having a cooling time control function of the test chamber.
Accordingly, as shown in fig. 1, the method includes:
s110, acquiring a preset initial temperature, a target temperature and an expected cooling time.
The initial temperature is the environmental temperature in the test box, namely the environmental temperature of the test box before the start of the cooling operation of the test box, and can be obtained by the test of an electronic thermometer or directly obtained by the test data of the test box, which is not limited in the embodiment; optionally, the test box can be a high-low temperature test box, a high-low temperature damp-heat alternating test box and the like with a temperature adjusting function; furthermore, the test box has the function of simulating the temperature change rule in the atmosphere environment, is mainly used for transporting electricians, electronic products, components and other materials in a low-temperature comprehensive environment, and can be used for the links of product design, improvement, identification, inspection and the like in an application process.
Further, the target temperature is an expected temperature expected by the test chamber through a cooling operation; it should be noted that, since the operation performed by the test chamber is a cooling operation, the target temperature is necessarily lower than the initial temperature, and in this embodiment, the range of the target temperature may be greater than or equal to zero or less than zero, and the lower limit of the specific temperature value is determined by the power of the test chamber, which is not limited in this embodiment; further, the desired cool down time is a total time required for the cool down operation to lower the temperature of the test chamber from the initial temperature to the target temperature, which is desired by the worker.
S120, determining a total cooling range according to a preset initial temperature and a target temperature, and dividing the total cooling range into n sections of target cooling ranges.
Specifically, the total cooling range is divided into n sections of target cooling ranges, including:
according to the total cooling range, the average cooling rate and the initial temperature, based on a preset formulaCalculating to obtain a temperature step parameter of a first section of target cooling range; wherein, delta T is the total cooling range, V is the average cooling rate;
for each target cooling range in each target cooling range, calculating to obtain a temperature step parameter corresponding to the current target cooling range according to the initial temperature, the total cooling range and the average cooling rate;
According to the temperature step length parameters corresponding to the target cooling ranges, calculating to obtain the temperature step length corresponding to the target cooling ranges based on a preset formula; wherein, the preset formula is:
ΔT n ＝n n ΔT；
wherein the DeltaT n For the temperature step length of the nth section target cooling range, n n And the temperature step length parameter is the temperature step length parameter of the nth section target cooling range, and delta T is the total cooling range.
Specifically, the n is n The specific calculation method of (a) can be as follows:
…
n n ＝1-(n 1 +n 2 +...+n n-1 )；
wherein the DeltaT 1 ,...,ΔT n-1 The target cooling range from the first section to the n-1 th section is defined, delta T is the total cooling range, and V is the average cooling rate.
It should be noted that the number of segments of the target cooling range may be determined by the accuracy required by the cooling operation of the test chamber, that is, the higher the accuracy required by the time control of the cooling operation, the more segments of the target cooling range; furthermore, the number of the segments of the target cooling range can be manually adjusted according to the accuracy condition of actual needs.
The method for manually setting the number of segments of the target cooling range provided by the embodiment ensures the high-precision requirement on time control in the high-precision test, and prevents the machine-independent loss and the resource waste caused by adopting the high-precision control method in the test with lower requirement precision.
S130, calculating opening data of the pulse electromagnetic valve in the test box in each target cooling range based on a preset formula according to the preset initial temperature, the target temperature and the target cooling range.
The pulse electromagnetic valve can input a pulse signal into a coil in the electromagnetic valve body through a wire, the pulse valve is controlled by an output signal of a pulse injection controller, and the rubber diaphragm is flexibly deformed to realize the opening and closing of the pulse valve by means of pressure change of a front air chamber and a rear air chamber of the valve; further, the parameters of the pulse electromagnetic valve can be the opening degree of the pulse electromagnetic valve, and further, the test box adjusts the liquid supply amount of the refrigerating liquid by adjusting the opening degree of the pulse electromagnetic valve so as to control the current temperature and the refrigerating rate in the test box.
And S140, calculating the rotation speed of the evaporator fan in each target cooling range based on a preset formula according to the opening data of the pulse electromagnetic valve.
Wherein, based on the S130, the evaporator may be used to perform an evaporation operation on the refrigerant liquid; specifically, the evaporator can be used for carrying out heat exchange between low-temperature refrigerating fluid and outside air, and gasifying and absorbing heat so as to achieve the refrigerating effect; it is obvious that since the evaporator is used for evaporating the refrigerant liquid, and the specific flow rate of the refrigerant liquid is determined by the opening degree of the expansion valve, the liquid evaporation rate of the evaporator is related to the opening degree of the expansion valve, that is, the evaporator fan rotation speed of the evaporator is related to the opening degree of the pulse electromagnetic valve.
Specifically, according to the opening data of the pulse electromagnetic valve, calculating the rotation speed of the evaporator fan in each target cooling range based on a preset formula, including:
according to the opening data of the pulse electromagnetic valve in each target cooling range, the sectional cooling rate matched with each target cooling range is calculated based on a preset formula to respectively obtain the rotation speed of the evaporator fan in each target cooling range; wherein, the preset formula is:
wherein, Δt1,..Δtn is first section to nth section target cooling range, V n For the sectional cooling rate matched with the nth target cooling range, V is the average cooling rate, un is the opening data of the pulse electromagnetic valve corresponding to the nth target cooling range, and Hmax is the maximum operating frequency of the fan.
It is easy to understand that the two target cooling ranges having adjacent relation on the total cooling range, the initial temperature corresponding to the target cooling range with lower initial temperature of the cooling range is the end temperature of the adjacent previous target cooling range.
The initial temperature is the initial temperature of the current target cooling range, namely the environmental temperature of the test box in the current target cooling range; further, the cooling rate is the cooling step length of the environmental temperature in the test chamber in unit time.
Further, after calculating the rotation speed of the evaporator fan in each target cooling range based on a preset formula according to the opening data of the pulse electromagnetic valve, the method further comprises the following steps:
and configuring the evaporator fan based on the rotation speed of the evaporator fan in each target cooling range.
In this embodiment, the test box is through carrying out the regulation of coolant flow to the aperture of pulse solenoid valve, afterwards the coolant evaporates in order to reach the purpose of cooling through evaporating the fan, so dispose the rotational speed of evaporating the fan can play the effect of control cooling rate, and then accurate control the cooling time of test box.
Specifically, when the cooling operation is nonlinear cooling, since there may be different cooling rates in each target cooling range, the rotation speed of the evaporator fan corresponding to each target cooling range is different from the opening data of the pulse electromagnetic valve, so that the rotation speed of the evaporator fan in each target cooling range is adjusted respectively to achieve the purpose of controlling the cooling time.
Optionally, the operation of configuring the evaporation fan may be directly obtained by acquiring opening data of each pulse electromagnetic valve based on a preset formula by an existing program, or may be set manually according to calculation data.
According to the technical scheme, the total cooling range is determined according to the preset initial temperature, the target temperature and the expected cooling time, then the total cooling range is divided into n sections of target cooling ranges, opening data of the pulse electromagnetic valve in the test box in each target cooling range are calculated based on a preset formula according to the preset initial temperature, the target temperature and the target cooling range, finally the rotation speed of the evaporator fan in each target cooling range is calculated based on a preset formula according to each opening data of the pulse electromagnetic valve, so that the cooling time of the nonlinear cooling operation of the test box is controlled, namely the cooling time of the test box is controlled, and the control accuracy of the cooling time is improved when the test box is subjected to cooling operation.
Example two
Fig. 2 is a flowchart of a cooling time control method for a test chamber according to a second embodiment of the present invention, where the method is based on the above embodiment, and in this embodiment, specifically, the method for calculating opening data of a pulse electromagnetic valve in the test chamber within each target cooling range based on a preset formula is refined.
Accordingly, as shown in fig. 2, the method includes:
s210, acquiring a preset initial temperature, a target temperature and an expected cooling time.
S220, determining a total cooling range according to a preset initial temperature and a target temperature, and dividing the total cooling range into n sections of target cooling ranges.
S230, respectively calculating opening data of the pulse electromagnetic valve in the test box in each target cooling range through a preset formula based on the preset initial temperature, the target temperature and the end temperature corresponding to each section of target cooling range.
Wherein, the preset formula is:
the T is 0 At an initial temperature T SV For the target temperature, K (n)1 Is a proportionality coefficient, K (n)2 As integral coefficient, K (n)3 As differential coefficient, deltaT 1 ,...,ΔT n-1 Target drop for first to n-1 th paragraphsTemperature range e n (τ) is the deviation function, Δt n And the cooling time length corresponding to each target cooling range is represented.
It should be noted that, in the nonlinear cooling experiment, the nonlinear change of the cooling rate may occur in a certain target cooling range, and at this time, in order to adjust the cooling rate, the opening data in the target cooling range needs to be adjusted in real time, that is, there may be opening data of a plurality of different pulse electromagnetic valves along with the temperature change in the same target cooling range.
In this embodiment, before the opening data of the pulse electromagnetic valve in the test chamber in each target cooling range is obtained by calculation through a preset formula, the method further includes:
and acquiring cooling time lengths corresponding to the target cooling ranges respectively according to the target cooling ranges, the initial temperature, the target temperature and the expected cooling time. The set target cooling range comprises a first target cooling range to an nth target cooling range; specifically, the obtaining the cooling time lengths corresponding to the cooling ranges of the targets respectively includes: acquiring the initial temperature as the initial temperature of a first target cooling range; according to the initial temperature, the average cooling rate, the expected cooling time, the target temperature and the temperature step length of the first target cooling range, calculating to obtain the cooling time length corresponding to the first target cooling range; and calculating the cooling time length corresponding to the current target cooling range according to the initial temperature, the target temperature, the expected cooling time, the average cooling rate and the total residual time matched with the current target cooling range for each target cooling range in the set target cooling ranges.
In a specific implementation manner of this embodiment, by way of example, if in a specific cooling test, the preset initial temperature is 0 ℃, the target temperature is-30 ℃, and the expected cooling time is 20min; the total cooling range is 30 ℃; further, the total cooling range is divided into 6 segments of target cooling ranges, and if the initial temperature of the first target cooling range is obtained under the current test conditionAt 0deg.C, assume that according to the initial temperature, the expected cooling time and average cooling rate are taken into a preset formula to calculate a cooling constant C 1 Based on cooling constant C 1 The preset formula is used for the total cooling range and the expected cooling timeCalculating to obtain a sectional cooling rate of 3 ℃/min of the first target cooling range (here, the assumption is that the actually calculated sectional cooling rate is related to the functional form), wherein deltaT is the cooling step length of the total cooling range, T is the expected cooling time, and then using the formula>The cooling time of the first target cooling range can be calculated to be 2min; then, taking the stage ending temperature of the first target cooling range as the current new starting temperature of the second target cooling range; it is easy to understand that, since the total cooling range is divided, and the temperature step of the first target cooling range is 6 ℃, that is, the first target cooling range is 0 ℃ to-6 ℃, it can be known that the initial temperature of the current second target cooling range is-6 ℃; similarly, according to the stage end temperature of the previous target cooling range-6 ℃, the target temperature-30 ℃, the expected cooling time 20min, the average cooling rate and the total remaining time 20min-2min (expected cooling time-used cooling time) matched with the current target cooling range, so as to obtain the cooling time of the second target cooling range; repeating the above operation until the stage end temperature of the sixth target cooling range reaches-30 ℃.
In this embodiment, before calculating the cooling time length corresponding to the first target cooling range according to the starting temperature, the average cooling rate, the expected cooling time, and the temperature step length of the first target cooling range, the method further includes:
based on the preset initial temperature, target temperature and expected cooling time, according toCalculating a preset formula to obtain an average cooling rate; wherein, the preset formula is:
wherein the T is 0 At an initial temperature T sv And t is the desired cooling time for the target temperature.
For example, setting the initial temperature to 20 ℃ and the target temperature to-30 and the expected cooling time to 50min in one cooling test, the average cooling rate of the above test is (20- (-30))/50=1 ℃/min.
S240, calculating the rotation speed of the evaporator fan in each target cooling range based on a preset formula according to the opening data of the pulse electromagnetic valve.
According to the technical scheme, the preset initial temperature, the target temperature and the expected cooling time are obtained, the total cooling range is determined according to the preset initial temperature and the target temperature, the total cooling range is divided into n sections of target cooling ranges, opening data of the pulse electromagnetic valve in the test box in each target cooling range are obtained through calculation according to a preset formula based on the preset initial temperature, the target temperature and the corresponding ending temperature of each section of target cooling range, and finally the rotation speed of the evaporator fan in each target cooling range is calculated according to each opening data of the pulse electromagnetic valve and based on the preset formula, so that the cooling time control of the nonlinear cooling operation of the test box is realized, namely the cooling time of the test box is controllable, and the control accuracy of the cooling time is improved when the test box is subjected to cooling operation.
Detailed description of the embodiments
In order to more clearly describe the technical solution provided by the embodiment of the present invention, this embodiment will simply introduce a specific implementation scenario obtained according to this embodiment.
Step one: the initial temperature T0 (DEG C), the target temperature TSV (DEG C) and the expected cooling time T are preset.
Step two: according to the initial temperature T0 (DEG C), the target temperature TSV (DEG C) and the expected cooling time T, calculating the total cooling range delta T and the average cooling rate V (DEG C/min), and dividing the total cooling range delta T into n parts, wherein the temperature step length of each part is as follows:
ΔT 1 ＝n 1 ΔT，
ΔT 2 ＝n 2 ΔT，
…
ΔT n-1 ＝n n-1 ΔT，
ΔT n ＝n n ΔT
ΔT＝ΔT 1 +ΔT 2 +...+ΔT n ＝T 0 -T SV
wherein:
…
n n ＝1-(n 1 +n 2 +...+n n-1 )。
wherein DeltaT is the total cooling range, V is the average cooling rate, deltaT 1 ，...，ΔT n-1 The target cooling range from the first section to the n-1 th section.
Step three: calculating the sectional cooling rate and the sectional cooling time corresponding to different target cooling ranges:
firstly, calculating a sectional cooling constant C corresponding to each target cooling range n Specific:
…
wherein C is 1 ，C 2 ...C n Respectively represent the cooling constants and delta T corresponding to the cooling ranges of the targets 1 ,...,ΔT n-1 The target cooling range from the first section to the n-1 th section is defined, delta T is the total cooling range, V is the average cooling rate, and T is the expected cooling time;
and then according to the cooling time constant of each target cooling range, calculating to obtain the sectional cooling rate corresponding to each target cooling range, namely:
…
Wherein V is 1 ，V 2 ...V n The sectional cooling rate corresponding to each target cooling range is calculated;
finally, calculating the length of the sectional cooling time corresponding to each target cooling range according to the sectional cooling rate corresponding to each target cooling range, namely
…
t＝Δt 1 +Δt 2 +...Δt n-1 +Δt n 。
Step four: calculating the opening u of the pulse electromagnetic valve corresponding to each target cooling range 1 ,u 2 ...,u n-1 ,u n :
…
Wherein the K is (n)1 Is a proportionality coefficient, K (n)2 As integral coefficient, K (n)3 The differential coefficient can be obtained directly from the prior art.
Step five: calculating the frequency H of the evaporator fan corresponding to each target cooling range 1 ,H 2 ...,H n-1 ,H n :
Wherein the DeltaT 1 ,...,ΔT n V is the target cooling range from the first section to the nth section n For the sectional cooling rate matched with the nth section target cooling range, V is the average cooling rate, u n The opening data of the pulse electromagnetic valve corresponding to the nth target cooling range is H max The maximum frequency of fan operation.
Step six: and configuring the evaporator fan based on the rotation speed of the evaporator fan in each target cooling time.
Example III
Fig. 3 is a schematic structural diagram of a cooling time control device of a test chamber according to a third embodiment of the present invention.
As shown in fig. 3, the apparatus includes:
a data acquisition module 310, configured to acquire a preset initial temperature, a target temperature, and an expected cooling time;
The cooling range segmentation module 320 is configured to determine a total cooling range according to a preset initial temperature and a target temperature, and segment the total cooling range into n segments of target cooling ranges;
the opening data calculation module 330 is configured to calculate opening data of the pulse electromagnetic valve in the test chamber in each target cooling range based on a preset formula according to a preset initial temperature, a target temperature and a target cooling range;
the fan rotation speed calculation module 340 is configured to calculate, according to the opening data of the pulse electromagnetic valve, the rotation speed of the evaporator fan within each target cooling range based on a preset formula.
According to the technical scheme, the total cooling range is determined according to the preset initial temperature, the target temperature and the expected cooling time, then the total cooling range is divided into n sections of target cooling ranges, opening data of the pulse electromagnetic valve in the test box in each target cooling range are calculated based on a preset formula according to the preset initial temperature, the target temperature and the target cooling range, finally the rotation speed of the evaporator fan in each target cooling range is calculated based on a preset formula according to each opening data of the pulse electromagnetic valve, so that the cooling time of the nonlinear cooling operation of the test box is controlled, namely the cooling time of the test box is controlled, and the control accuracy of the cooling time is improved when the test box is subjected to cooling operation.
On the basis of the above embodiment, the opening data calculating module 330 is further configured to:
and respectively calculating opening data of the pulse electromagnetic valve in the test box in each target cooling range through a preset formula based on the preset initial temperature, the target temperature and the corresponding ending temperature of each section of target cooling range.
On the basis of the embodiment, the system further comprises a time length acquisition module, wherein the time length acquisition module is used for acquiring the cooling time lengths respectively corresponding to the target cooling ranges according to the target cooling ranges, the initial temperature, the target temperature and the expected cooling time before opening data of the pulse electromagnetic valve in the test box in the target cooling ranges are respectively calculated through a preset formula.
On the basis of the above embodiment, the time length obtaining module further includes:
the initial temperature setting unit is used for acquiring the initial temperature and taking the initial temperature as the initial temperature of the first target cooling range;
the first cooling range determining unit is used for calculating and obtaining the cooling time length corresponding to the first target cooling range according to the initial temperature, the average cooling rate, the expected cooling time, the target temperature and the temperature step length of the first target cooling range;
The second cooling range determining unit is used for calculating and obtaining the cooling time length corresponding to the current target cooling range according to the initial temperature, the target temperature, the expected cooling time, the average cooling rate and the total residual time matched with the current target cooling range for each target cooling range in the set target cooling ranges.
Based on the above embodiment, the cooling range dividing module 320 further includes:
the first temperature step size parameter calculation unit is used for calculating and obtaining a temperature step size parameter of a first section of target cooling range based on a preset formula according to the total cooling range, the average cooling rate and the initial temperature;
the temperature step size parameter calculation unit is used for calculating and obtaining the temperature step size parameter corresponding to the current target cooling range according to the initial temperature, the total cooling range, the initial temperature and the average cooling rate for each target cooling range in the target cooling ranges;
and the temperature step length calculation unit is used for calculating the temperature step length corresponding to each target cooling range based on a preset formula according to the temperature step length parameters corresponding to the total cooling range and each target cooling range.
On the basis of the above embodiment, the method further comprises: the average rate calculation module is configured to calculate, according to the initial temperature, the average cooling rate, the expected cooling time, and the temperature step length of the first target cooling range, based on the preset initial temperature, the target temperature, and the expected cooling time, before calculating the cooling time length corresponding to the first target cooling range, and calculate the average cooling rate according to a preset formula.
Based on the above embodiment, the fan speed calculation module 340 is further configured to:
and according to the opening data of the pulse electromagnetic valve in each target cooling range, the sectional cooling rate matched with each target cooling range is calculated based on a preset formula to respectively obtain the rotating speed of the evaporator fan in each target cooling range.
The cooling time control device of the test box provided by the embodiment of the invention can execute the cooling time control method of the test box provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example IV
Fig. 4 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 4, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as the cool down time control method of the test chamber.
Accordingly, the method comprises the following steps:
acquiring preset initial temperature, target temperature and expected cooling time;
determining a total cooling range according to a preset initial temperature and a target temperature, and dividing the total cooling range into n sections of target cooling ranges;
calculating opening data of the pulse electromagnetic valve in the test box in each target cooling range based on a preset formula according to the preset initial temperature, the target temperature and the target cooling range;
and calculating the rotation speed of the evaporator fan in each target cooling range based on a preset formula according to the opening data of the pulse electromagnetic valve.
In some embodiments, the method of controlling the cool down time of a test chamber may be implemented as a computer program tangibly embodied on a computer readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the cool down time control method of the test chamber described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the cool down time control method of the test chamber in any other suitable manner (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
Claims (10)
1. The cooling time control method of the test box is characterized by comprising the following steps of:
acquiring preset initial temperature, target temperature and expected cooling time;
determining a total cooling range according to a preset initial temperature and a target temperature, and dividing the total cooling range into n sections of target cooling ranges;
calculating opening data of the pulse electromagnetic valve in the test box in each target cooling range based on a preset formula according to the preset initial temperature, the target temperature and the target cooling range;
and calculating the rotation speed of the evaporator fan in each target cooling range based on a preset formula according to the opening data of the pulse electromagnetic valve.
2. The method of claim 1, wherein calculating opening data of the pulse solenoid valve in the test chamber in each target cooling range based on a preset formula according to a preset initial temperature, a target temperature, and a target cooling range, comprises:
Based on a preset initial temperature, a target temperature and an end temperature corresponding to each section of target cooling range, opening data of the pulse electromagnetic valve in the test box in each target cooling range are respectively calculated through a preset formula; wherein, the preset formula is:
e n (τ)＝T-T SV ,T 0 -ΔT 1 -…-ΔT n-2 -ΔT n-1 ≥T≥T SV ；
wherein the T is 0 At an initial temperature T SV For the target temperature, K (n)1 Is a proportionality coefficient, K (n)2 As integral coefficient, K (n)3 As differential coefficient, deltaT 1 ,...,ΔT n-1 E, for the target cooling range from the first section to the n-1 th section n (τ) is the deviation function, Δt n And the cooling time length corresponding to each target cooling range is represented.
3. The method according to claim 2, wherein before calculating opening data of the pulse electromagnetic valve in the test chamber in each target cooling range according to a preset formula, the method further comprises:
and acquiring cooling time lengths corresponding to the target cooling ranges respectively according to the target cooling ranges, the initial temperature, the target temperature and the expected cooling time.
4. A method according to claim 3, wherein the target temperature corresponding to the target cooling range comprises: setting the stage end temperature of the target cooling range; the set target cooling range comprises a first target cooling range to an nth target cooling range;
The obtaining the cooling time length corresponding to each target cooling range respectively comprises the following steps:
according to the average cooling rate, the expected cooling time, the initial temperature, the target temperature and the temperature step length of the first target cooling range, calculating to obtain the cooling time length corresponding to the first target cooling range;
and calculating the cooling time length corresponding to the current target cooling range according to the initial temperature, the target temperature, the expected cooling time, the average cooling rate, the temperature step length of the current target cooling range and the total residual time matched with the current target cooling range for each target cooling range in the set target cooling ranges.
5. The method of claim 3, wherein before calculating the cooling time length corresponding to the first target cooling range according to the starting temperature, the target temperature, the average cooling rate, the desired cooling time, and the temperature step length of the first target cooling range, further comprising:
calculating to obtain an average cooling rate according to a preset formula based on the preset initial temperature, the target temperature and the expected cooling time; wherein, the preset formula is:
Wherein the T is 0 At an initial temperature T sv And t is the desired cooling time for the target temperature.
6. The method of any one of claims 1-5, wherein calculating the evaporator fan speed in each target cooling range based on a preset formula from each opening data of the pulse solenoid valve comprises:
according to the opening data of the pulse electromagnetic valve in each target cooling range, the sectional cooling rate matched with each target cooling range is calculated based on a preset formula to respectively obtain the rotation speed of the evaporator fan in each target cooling range; wherein, the preset formula is:
wherein, Δt1,..Δtn is first section to nth section target cooling range, V n For the sectional cooling rate matched with the nth section of target cooling range, V is the average cooling rate, un is the opening data of the pulse electromagnetic valve corresponding to the nth section of target cooling range, H max The maximum frequency of fan operation.
7. The method of any one of claims 1-5, wherein partitioning the total cooling range into n segments of target cooling ranges comprises:
according to the total cooling range, the average cooling rate and the initial temperature, based on a preset formulaCalculating to obtain a temperature step parameter of a first section of target cooling range; wherein, delta T is the total cooling range, V is the average cooling rate;
For each target cooling range in each target cooling range, calculating to obtain a temperature step parameter corresponding to the current target cooling range according to the initial temperature, the total cooling range, the stage ending temperature of the previous target cooling range and the average cooling rate;
according to the total cooling range, the average cooling rate and the temperature step parameters corresponding to the target cooling ranges, calculating to obtain the temperature step corresponding to the target cooling ranges based on a preset formula; wherein, the preset formula is:
ΔT n ＝n n ΔT；
wherein the DeltaT n For the temperature step length of the nth section target cooling range, n n And the temperature step length parameter is the temperature step length parameter of the nth section target cooling range, and delta T is the total cooling range.
8. A cooling time control device for a test chamber, comprising:
the data acquisition module is used for acquiring preset initial temperature, target temperature and expected cooling time;
the cooling range segmentation module is used for determining a total cooling range according to a preset initial temperature and a target temperature and segmenting the total cooling range into n sections of target cooling ranges;
the opening data calculation module is used for calculating opening data of the pulse electromagnetic valve in the test box in each target cooling range based on a preset formula according to the preset initial temperature, the target temperature and the target cooling range;
And the fan rotating speed calculating module is used for calculating the rotating speed of the evaporator fan in each target cooling range based on a preset formula according to the opening data of the pulse electromagnetic valve.
9. An electronic device, the electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of controlling the cool down time of the test chamber of any one of claims 1-7.
10. A computer readable storage medium having stored thereon computer instructions for causing a processor to execute the method of controlling the cool down time of a test chamber according to any one of claims 1 to 7.
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