CN117839776A - Temperature change test box early warning system - Google Patents
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- CN117839776A CN117839776A CN202410018489.9A CN202410018489A CN117839776A CN 117839776 A CN117839776 A CN 117839776A CN 202410018489 A CN202410018489 A CN 202410018489A CN 117839776 A CN117839776 A CN 117839776A
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Abstract
The invention belongs to the field of temperature change test boxes, and discloses a temperature change test box early warning system which comprises a temperature sensor, an inner box, a temperature processing module and an early warning module; the inner box comprises four side surfaces and two bottom surfaces, and the four side surfaces and the two bottom surfaces form a cubic area; the temperature sensors are uniformly arranged on the side face and the bottom face of the inner box of the temperature change test box, and are used for acquiring the temperature of the position where the temperature sensors are located and transmitting the acquired temperature to the temperature processing module; the temperature processing module is used for calculating the temperature obtained by the temperature sensor to obtain the temperature of the inner box; and when the temperature of the inner box exceeds a set temperature threshold value, the early warning module carries out early warning on workers. According to the invention, the plurality of temperature sensors are uniformly arranged on the side surface and the bottom surface of the inner box, and the obtained temperatures of the plurality of temperature sensors are utilized to comprehensively calculate the temperature of the inner box, so that the obtained temperature is more accurate.
Description
Technical Field
The invention relates to the field of temperature change test boxes, in particular to a temperature change test box early warning system.
Background
The temperature change test box is suitable for testing various performance indexes of aerospace products, information electronic instruments and meters, materials, electricians, electronic products and various electronic components under the condition of rapid temperature change.
In the use process of the temperature change test box, the temperature of the inner box of the temperature change test box needs to be obtained so as to regulate and control the temperature of the inner box of the temperature change test box, and when the temperature of the inner box of the temperature change test box exceeds a set temperature threshold value, the control carries out early warning prompt on staff so as to improve the safety of the temperature change test box. The inner box is a space used for carrying out temperature test on the tested product in the temperature change test box.
However, in the prior art, there is typically only one temperature sensor in the inner chamber of the temperature change test chamber, and the temperature in the temperature change test chamber may not accurately obtain the accurate temperature in the temperature change test chamber, because if the temperature sensor is disposed relatively close to the position where heat is generated, the measured temperature may be the highest in the test chamber, and if the temperature sensor is disposed far from the position where heat is generated, the measured temperature may be the lowest.
Disclosure of Invention
The invention aims to disclose a temperature change test box early warning system, which solves the problem of how to obtain more accurate temperature inside a temperature change box when the temperature of the inner box of the temperature change box is obtained.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a temperature change test box early warning system which comprises a temperature sensor, an inner box, a temperature processing module and an early warning module, wherein the temperature sensor is connected with the inner box;
the inner box comprises four side surfaces and two bottom surfaces, and the four side surfaces and the two bottom surfaces form a cubic area;
the temperature sensors are uniformly arranged on the side face and the bottom face of the inner box of the temperature change test box, and are used for acquiring the temperature of the position where the temperature sensors are located and transmitting the acquired temperature to the temperature processing module;
the temperature processing module is used for calculating the temperature obtained by the temperature sensor to obtain the temperature of the inner box;
and when the temperature of the inner box exceeds a set temperature threshold value, the early warning module carries out early warning on workers.
Optionally, the four side faces are all perpendicular to the horizontal plane, the included angle between two adjacent side faces is 90 degrees, and the side edges of the four side faces are sequentially connected;
the two bottom surfaces are respectively an upper bottom surface and a lower bottom surface; the side surfaces are positioned between the upper bottom surface and the lower bottom surface; the top edge and the bottom edge of the side surface are respectively connected with the edges of the upper bottom surface and the lower bottom surface.
Optionally, one side surface is an inner box door.
Optionally, the side and the bottom surface of the inner box of a temperature change test box are evenly provided with a plurality of temperature sensors, including:
dividing the side surface into 4 first areas with the same area, and arranging a temperature sensor at the central position of each first area;
the bottom surface is divided into 4 second areas with the same area, and a temperature sensor is arranged at the central position of each second area.
Optionally, the temperature sensor further comprises a control module, wherein the control module is used for calculating the temperature measurement interval of the temperature sensor;
the temperature sensor is used for collecting the temperature of the position of the temperature sensor based on the temperature measurement interval and transmitting the obtained temperature to the temperature processing module.
Optionally, calculating a temperature measurement interval of the temperature sensor includes:
in the temperature rising stage of the inner box, the calculation formula of the temperature measuring interval is as follows:
tstimrs k+1 and tstimrs k Respectively represent the k+1th and the k temperature measuring intervals of the temperature rising stage, T k Representing the temperature of the inner tank obtained based on the kth temperature measurement interval; t (T) aim A target temperature representing a temperature rising stage, a preset temperature representing a preset temperature, a minimum value of a preset temperature measurement interval representing a preset temperature,
in the cooling stage of the inner box, the calculation formula of the temperature measurement interval is as follows:
tstimcd n+1 and tstimcd n Respectively represent the (n+1) th and the (n) th temperature measuring intervals in the temperature reduction stage, T n Representing the temperature of the inner tank obtained based on the nth temperature measurement interval; t (T) aimcd The target temperature of the cooling stage is represented;
in the cooling stage of the inner box, the calculation formula of the temperature measurement interval is as follows:
tstkep＝tstimrs 1 +tstimcd 1
tstimrs 1 and tstimcd 1 The 1 st temperature measuring interval of the temperature rising stage and the 1 st temperature measuring interval of the temperature lowering stage are respectively shown.
Optionally, calculating the temperature obtained by the temperature sensor to obtain the temperature of the inner box includes:
saving the temperatures obtained by all the temperature sensors at the same time to a set tempU;
respectively carrying out noise reduction calculation on each temperature in the tempU to obtain a noise-reduced temperature;
and calculating the temperature of the inner box based on all the noise-reduced temperatures.
Optionally, calculating the temperature of the inner box based on all the noise-reduced temperatures includes:
storing all the noise-reduced temperatures to a set filU;
the temperature of the inner box was calculated using the following formula:
t final the temperature of the inner box is represented, nfilU represents the total number of the temperature after noise reduction in filU, temp i The denoised temperature i in filU is indicated.
The beneficial effects are that:
compared with the prior art, the temperature of the inner box is comprehensively calculated by uniformly setting the plurality of temperature sensors on the side surfaces and the bottom surface of the inner box and utilizing the temperatures obtained by the plurality of temperature sensors, and the temperatures of different areas are considered when the temperature of the inner box is calculated, so that the highest temperature and the lowest temperature in the finally obtained temperatures only refer to a part, and the obtained temperature is more accurate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a temperature change test chamber warning system of the present invention.
Fig. 2 is a schematic illustration of the side of the inner box of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in FIG. 1, the invention provides a temperature change test box early warning system, which comprises
The device comprises a temperature sensor, an inner box, a temperature processing module and an early warning module;
the inner box comprises four side surfaces and two bottom surfaces, and the four side surfaces and the two bottom surfaces form a cubic area;
the temperature sensors are uniformly arranged on the side face and the bottom face of the inner box of the temperature change test box, and are used for acquiring the temperature of the position where the temperature sensors are located and transmitting the acquired temperature to the temperature processing module;
the temperature processing module is used for calculating the temperature obtained by the temperature sensor to obtain the temperature of the inner box;
and when the temperature of the inner box exceeds a set temperature threshold value, the early warning module carries out early warning on workers.
According to the invention, the plurality of temperature sensors are uniformly arranged on the side surface and the bottom surface of the inner box, the temperature of the inner box is comprehensively calculated by utilizing the obtained temperatures of the plurality of temperature sensors, and the temperatures of different areas are considered when the temperature of the inner box is calculated, so that the highest temperature and the lowest temperature in the finally obtained temperatures only refer to a part, and the obtained temperature is more accurate.
In the prior art, only one temperature sensor is usually arranged in the temperature change test box, which brings difficulty to accurately keeping the target temperature in the constant temperature stage, because the temperature in the temperature change test box is not completely the same, and a region with the temperature slightly lower than the target temperature and a region with the temperature slightly higher than the target temperature exist. If the temperature sensor is just in a high temperature area, the temperature control system of the temperature change test box tries to reduce the temperature; if the temperature sensor is just in the region with slightly lower temperature, the temperature control system of the temperature change test box tries to raise the temperature, and the two control modes lead the temperature control of the temperature change test box in the constant temperature stage to be inaccurate, and the temperature fluctuation to be larger, so that the result obtained in the process of carrying out the temperature change experiment on the product is inaccurate.
Optionally, the four side faces are all perpendicular to the horizontal plane, the included angle between two adjacent side faces is 90 degrees, and the side edges of the four side faces are sequentially connected;
the two bottom surfaces are respectively an upper bottom surface and a lower bottom surface; the side surfaces are positioned between the upper bottom surface and the lower bottom surface; the top edge and the bottom edge of the side surface are respectively connected with the edges of the upper bottom surface and the lower bottom surface.
As shown in fig. 2, A, B, C, D each represents one side. The upper and lower floors are not shown in fig. 2. Side A and side B are perpendicular to each other, side B and side C are perpendicular to each other, side C and side D are perpendicular to each other, and side D and side A are perpendicular to each other.
Optionally, one side surface is an inner box door.
As shown in fig. 2, the D side may be an inner door, and after the inner door is opened, an object to be subjected to a temperature change test may be placed in the inner door, and then the inner door is closed to start the test.
Optionally, the side and the bottom surface of the inner box of a temperature change test box are evenly provided with a plurality of temperature sensors, including:
dividing the side surface into 4 first areas with the same area, and arranging a temperature sensor at the central position of each first area;
the bottom surface is divided into 4 second areas with the same area, and a temperature sensor is arranged at the central position of each second area.
In the invention, each side surface is divided into 4 first areas with the same area, each bottom surface is also divided into 4 second areas with the same area, and the temperature sensors are uniformly arranged by arranging the temperature sensors in the center of the areas, so that the temperatures of different areas of the inner box can be obtained more effectively.
Optionally, the temperature sensor further comprises a control module, wherein the control module is used for calculating the temperature measurement interval of the temperature sensor;
the temperature sensor is used for collecting the temperature of the position of the temperature sensor based on the temperature measurement interval and transmitting the obtained temperature to the temperature processing module.
Specifically, in the prior art, a fixed temperature measurement interval is generally set directly, but since the temperature change in the temperature change test chamber is rapid, the temperature measurement interval needs to be set relatively small in order to obtain temperature feedback in time to control the temperature control device of the inner chamber. However, the smaller temperature measurement interval can lead to increased energy consumption on one hand, and on the other hand, as the temperature sensors are arranged, the temperature obtained by the temperature measuring device is too high, so that the temperature of the inner box is not easy to calculate in time. Therefore, the temperature measuring interval of the temperature sensor is calculated through the control module, so that the temperature measuring interval can be adaptively changed along with the test process, the feedback of the temperature of the inner box is ensured in time, and the number of the obtained temperatures is reduced.
Optionally, calculating a temperature measurement interval of the temperature sensor includes:
in the temperature rising stage of the inner box, the calculation formula of the temperature measuring interval is as follows:
tstimrs k+1 and tstimrs k Respectively represent the k+1th and the k temperature measuring intervals of the temperature rising stage, T k Representing the temperature of the inner tank obtained based on the kth temperature measurement interval; t (T) aim A target temperature representing a temperature rising stage, a preset temperature representing a preset temperature, a minimum value of a preset temperature measurement interval representing a preset temperature,
in the cooling stage of the inner box, the calculation formula of the temperature measurement interval is as follows:
tstimcd n+1 and tstimcd n Respectively represent the (n+1) th and the (n) th temperature measuring intervals in the temperature reduction stage, T n Representing the temperature of the inner tank obtained based on the nth temperature measurement interval; t (T) aimcd The target temperature of the cooling stage is represented;
in the cooling stage of the inner box, the calculation formula of the temperature measurement interval is as follows:
tstkep＝tstimrs 1 +tstimcd 1
tstimrs 1 and tstimcd 1 The 1 st temperature measuring interval of the temperature rising stage and the 1 st temperature measuring interval of the temperature lowering stage are respectively shown.
Specifically, in the process of performing the test, the temperature of the temperature change test box can change greatly, namely a heating stage, a constant temperature stage, a cooling stage and the like can occur. If the same temperature measurement interval is still adopted like the prior art, if the temperature measurement interval is set too large, the temperature can not be obtained in time when the temperature change speed is high, and feedback is performed, so that the temperature of the inner box is higher than the target temperature in the temperature raising stage when the temperature is raised, and is lower than the target temperature in the temperature lowering stage when the temperature is lowered, and larger deviation appears with the original test deviation, so that the test result is inaccurate.
If the temperature measurement interval is set to be too small, the temperature can be obtained in time and fed back, but the temperature of the inner box is calculated according to the results of the plurality of temperature sensors, so that the time for obtaining the temperature of the inner box is too long, and the temperature of the inner box is not favorable for being determined in time.
In the temperature rising stage, along with the increase of the temperature of the inner box, the temperature measuring interval is also reduced, and the larger the increasing amplitude is, the larger the decreasing amplitude of the temperature measuring interval is, so that in the temperature rising stage, when the temperature of the inner box is closer to the target temperature in the temperature rising stage, the smaller the temperature measuring interval is, the more timely the temperature feedback is, and the temperature of the inner box can be controlled more accurately.
In the cooling stage, along with the reduction of the temperature of the inner box, the temperature measurement interval is reduced, and the larger the reduction amplitude is, the larger the reduction amplitude of the temperature measurement interval is, so that in the cooling stage, when the temperature of the inner box is closer to the target temperature in the cooling stage, the smaller the temperature measurement interval is, the more timely the temperature feedback is, and the temperature of the inner box can be controlled more accurately.
In the constant temperature stage, the temperature measuring interval of the invention is larger than the temperature measuring interval of the temperature raising stage and the temperature lowering stage, and because the temperature change of the constant temperature stage is slower, the invention adopts a longer temperature measuring interval to reduce the number of the obtained temperatures.
Furthermore, the control module immediately starts to calculate the next temperature measuring interval after the temperature of the inner box is obtained once.
The temperature of the inner box obtained based on the kth temperature measurement interval means that after the temperature of k-1 times is obtained, the kth temperature measurement interval is calculated, then the countdown is started, and when the countdown with the length of the kth temperature measurement interval is completed, the temperature of the inner box is obtained after the temperature of the inner box is obtained.
The temperature of the inner box obtained based on the nth temperature measurement interval refers to the temperature of the inner box obtained by calculating the nth temperature measurement interval after the n-1 th temperature acquisition is finished, and starting to obtain the temperature of the inner box after the countdown of the nth temperature measurement interval is completed.
Alternatively, the 1 st temperature measurement interval and the 1 st temperature measurement interval of the cooling stage may be 1 second. The value of the set may be 0.05 seconds.
Alternatively, the minimum value of the preset thermometry interval may be 0.1 seconds.
Optionally, calculating the temperature obtained by the temperature sensor to obtain the temperature of the inner box includes:
saving the temperatures obtained by all the temperature sensors at the same time to a set tempU;
respectively carrying out noise reduction calculation on each temperature in the tempU to obtain a noise-reduced temperature;
and calculating the temperature of the inner box based on all the noise-reduced temperatures.
Specifically, the noise reduction calculation is performed on the temperature, so that the influence of noise on a final calculation result can be reduced, and the temperature of the inner box can be obtained more accurately.
Optionally, the noise reduction calculation is performed on each temperature in the tempU to obtain a noise reduced temperature, including:
for temperature temp in tempU, it willThe acquisition time of (1) is denoted as t temp Temp is denoised using the following formula:
lwtemp represents the temperature after noise reduction obtained by performing noise reduction calculation on temp, length j,temp Representing the distance between the temperature sensors acquiring j and temp, bxtemp represents the set of temperatures acquired by all the temperature sensors in a spherical region with radius H, centered on the temperature sensor acquiring temp, bxthe acquisition time of the temperature in temp is also t temp ；
The determination process of H comprises the following steps:
if temp is the temperature obtained in the warm-up phase, then H is calculated using the following formula:
if temp is the temperature obtained in the reduced stage, then H is calculated using the following formula:
bsaeH represents a preset radius;
if temp is the temperature obtained during the constant temperature phase, then H is calculated using the following formula:
milength represents the minimum value of the distance between the temperature sensor corresponding to the temperature in bxtemp and the temperature sensor corresponding to temp, and mivalue represents the temperature standard deviation,
nbxtemp represents the total number of temperatures in bxtemp.
In the noise reduction process, different formulas are set for temp at different stages to calculate the radius of the spherical region, so that the method can obtain different radii in a self-adaptive mode at different moments in different stages. When the temperature is closer to the target temperature, the temperature measurement interval of the invention is reduced, so that the number of times of controlling the temperature of the inner box is possibly increased, and in this stage, the obtained temperature is more, at this time, the radius value of the invention is reduced, so that in the process of denoising the temperature, less temperature participates in the denoising process to improve the denoising efficiency, and when the temperature is farther from the target temperature, the radius is increased, and the temp is filtered based on the temperature obtained by more other temperature sensors, so that the filtering result is more accurate, namely, the overall denoising efficiency and the denoising accuracy are both considered, and the temperature change speed of the temperature rising stage and the temperature reducing stage can not be influenced by the filtering of the invention.
The noise reduction process is performed based on the fact that the temperature obtained by other temperature sensors around the temp temperature sensor at the same time is obtained, if the distance between the two temperature sensors is smaller, the difference value between the temperature values is smaller, the larger reference proportion is given when the noise is reduced, namely the influence on the final filtering result is larger, otherwise, the smaller reference proportion is given, and therefore the influence on the noise reduction result caused by the noise can be reduced, and the more accurate noise reduction result is obtained.
Alternatively, the predetermined radius is 50 cm.
Specifically, when in setting, the preset radius increases with the increase of the volume of the inner box.
Optionally, calculating the temperature of the inner box based on all the noise-reduced temperatures includes:
storing all the noise-reduced temperatures to a set filU;
the temperature of the inner box was calculated using the following formula:
t final the temperature of the inner box is represented, nfilU represents the total number of the temperature after noise reduction in filU, temp i The denoised temperature i in filU is indicated.
Optionally, the early warning module comprises a temperature threshold setting unit and an early warning unit;
the temperature threshold setting unit is used for setting a temperature threshold by a worker;
the early warning unit is used for early warning the staff when the temperature of the inner box is larger than a set temperature threshold value.
Specifically, the early warning can be performed by playing an early warning prompt tone.
When the temperature of the inner box exceeds a set temperature threshold value, the early warning module gives an early warning to staff
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.
Various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that some or all of the functions of some or all of the components in a hardware configuration device for a request message according to an embodiment of the present invention may be implemented in practice using a microprocessor or Digital Signal Processor (DSP). The present invention can also be implemented as an apparatus or device program (e.g., a computer program and a computer program product) for performing a portion or all of the methods described herein. Such a program embodying the present invention may be stored on a computer readable medium, or may have the form of one or more signals. Such signals may be downloaded from an internet website, provided on a carrier signal, or provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The temperature change test box early warning system is characterized by comprising a temperature sensor, an inner box, a temperature processing module and an early warning module;
the inner box comprises four side surfaces and two bottom surfaces, and the four side surfaces and the two bottom surfaces form a cubic area;
the temperature sensors are uniformly arranged on the side face and the bottom face of the inner box of the temperature change test box, and are used for acquiring the temperature of the position where the temperature sensors are located and transmitting the acquired temperature to the temperature processing module;
the temperature processing module is used for calculating the temperature obtained by the temperature sensor to obtain the temperature of the inner box;
and when the temperature of the inner box exceeds a set temperature threshold value, the early warning module carries out early warning on workers.
2. The temperature change test box early warning system according to claim 1, wherein four side faces are perpendicular to a horizontal plane, an included angle between two adjacent side faces is 90 degrees, and side edges of the four side faces are sequentially connected;
the two bottom surfaces are respectively an upper bottom surface and a lower bottom surface; the side surfaces are positioned between the upper bottom surface and the lower bottom surface; the top edge and the bottom edge of the side surface are respectively connected with the edges of the upper bottom surface and the lower bottom surface.
3. The system of claim 1, wherein one of the sides is an inner door.
4. The temperature change test chamber warning system of claim 1, wherein the plurality of temperature sensors are uniformly disposed on the side and bottom surfaces of the inner chamber of the temperature change test chamber, comprising:
dividing the side surface into 4 first areas with the same area, and arranging a temperature sensor at the central position of each first area;
the bottom surface is divided into 4 second areas with the same area, and a temperature sensor is arranged at the central position of each second area.
5. The temperature change test chamber early warning system according to claim 1, further comprising a control module for calculating a temperature measurement interval of the temperature sensor;
the temperature sensor is used for collecting the temperature of the position of the temperature sensor based on the temperature measurement interval and transmitting the obtained temperature to the temperature processing module.
6. The system of claim 1, wherein calculating the temperature measurement interval of the temperature sensor comprises:
in the temperature rising stage of the inner box, the calculation formula of the temperature measuring interval is as follows:
tstimrs k+1 and tstimrs k Respectively represent the k+1th and the k temperature measuring intervals of the temperature rising stage, T k Representing the temperature of the inner tank obtained based on the kth temperature measurement interval; t (T) aim A target temperature representing a temperature rising stage, a preset temperature representing a preset temperature, a minimum value of a preset temperature measurement interval representing a preset temperature,
in the cooling stage of the inner box, the calculation formula of the temperature measurement interval is as follows:
tstimcd n+1 and tstimcd n Respectively represent the (n+1) th and the (n) th temperature measuring intervals in the temperature reduction stage, T n Representing the temperature of the inner tank obtained based on the nth temperature measurement interval; t (T) aimcd The target temperature of the cooling stage is represented;
in the cooling stage of the inner box, the calculation formula of the temperature measurement interval is as follows:
tstkep＝tstimrs 1 +tstimcd 1
tstimrs 1 and tstimcd 1 The 1 st temperature measuring interval of the temperature rising stage and the 1 st temperature measuring interval of the temperature lowering stage are respectively shown.
7. The system of claim 1, wherein the calculating the temperature obtained by the temperature sensor to obtain the temperature of the inner box comprises:
saving the temperatures obtained by all the temperature sensors at the same time to a set tempU;
respectively carrying out noise reduction calculation on each temperature in the tempU to obtain a noise-reduced temperature;
and calculating the temperature of the inner box based on all the noise-reduced temperatures.
8. The temperature change test chamber warning system of claim 7, wherein calculating the temperature of the inner chamber based on all the noise-reduced temperatures comprises:
storing all the noise-reduced temperatures to a set filU;
the temperature of the inner box was calculated using the following formula:
t final the temperature of the inner box is represented, nfilU represents the total number of the temperature after noise reduction in filU, temp i The denoised temperature i in filU is indicated.
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