A temperature control method and apparatus for thermal conductivity detection

Abstract

The application discloses a temperature control method and device for thermal conductivity detection, comprising: in the process of heating according to the final heating power, actively regulating the uniformity of the sample table measuring point temperature; when the steady state in the detection cavity is determined through the active regulation of the uniformity, starting the thermal conductivity detection program, and actively suppressing the temperature disturbance generated in the detection process. Through the determination of the heating power of the temperature collected at different positions in the detection cavity, the response lag and temperature overshoot caused by the single measuring point temperature are avoided; the uniformity of the measuring point temperature is actively regulated during the heating process to adapt to complex working conditions, the subjectivity of manual judgment is eliminated through automatic steady state determination, and it is ensured that each detection can be started under the same environmental conditions; in the detection process, the temperature disturbance is actively suppressed, so that the detection environment is kept stable and continuous.

Description

Technical Field

[0001] This invention relates to the field of materials testing technology, and in particular to a temperature control method and apparatus for detecting thermal conductivity. Background Technology

[0002] Thermal conductivity is an important thermophysical property parameter of materials, and its detection accuracy is significantly affected by environmental conditions (temperature, humidity, and airflow, etc.). Currently, forced-air drying ovens are widely used to provide a dry and stable environment for thermal conductivity testing. Existing forced-air drying ovens typically adopt a "heating + forced-air circulation + single-point temperature control" working mode, that is, a heat source is generated by a heating element, and the air in the testing chamber is forcibly circulated by a forced-air system to bring the testing chamber to the set temperature.

[0003] However, existing forced-air drying ovens for thermal conductivity testing mainly suffer from several technical problems, including a single control strategy with lag leading to temperature overshoot, a lack of active control methods resulting in temperature uniformity that cannot adapt to complex working conditions, reliance on subjective human experience for steady-state determination lacking quantitative standards, and a lack of active suppression capabilities against operational disturbances such as door opening and voltage fluctuations. These factors collectively lead to an unstable testing environment and drift in heat flux readings, severely affecting the accuracy and repeatability of the test results. Summary of the Invention

[0004] This invention provides a temperature control method for thermal conductivity testing, so as to achieve precise temperature control during the thermal conductivity testing process.

[0005] According to a first aspect of the present invention, a temperature control method for detecting thermal conductivity is provided, the method comprising: The real-time temperature data collected by sensors at different locations within the detection chamber includes ambient temperature, heater outlet temperature, and temperatures at multiple sample stage measuring points. The final heating power for the detection cavity is determined based on the real-time temperature data and the target detection temperature. During the heating process according to the final heating power, the temperature of the sample stage measuring points is actively and uniformly controlled. When the detection cavity reaches a steady state through active uniformity control, the thermal conductivity detection program is initiated, and temperature disturbances generated during the detection process are actively suppressed.

[0006] According to another aspect of the present invention, a temperature control device for detecting thermal conductivity is provided, the device comprising: The real-time temperature data collected by sensors at different locations within the detection chamber includes ambient temperature, heater outlet temperature, and temperatures at multiple sample stage measuring points. The final heating power for the detection cavity is determined based on the real-time temperature data and the target detection temperature. During the heating process according to the final heating power, the temperature of the sample stage measuring points is actively and uniformly controlled. When the detection cavity reaches a steady state through active uniformity control, the thermal conductivity detection program is initiated, and temperature disturbances generated during the detection process are actively suppressed.

[0007] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising: one or more processors; Storage device for storing one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the method described in any embodiment of the present invention.

[0008] According to another aspect of the present invention, a storage medium for computer-executable instructions is provided, on which a computer program is stored, which, when executed by a processor, implements the method as described in any of the embodiments of the present invention.

[0009] The technical solution of this invention determines the heating power of the temperature collected at different locations within the detection chamber, thereby avoiding the response lag and temperature overshoot caused by a single measurement point temperature. During the heating process, the temperature of each measurement point is actively adjusted for uniformity to adapt to complex working conditions. Automatic steady-state determination eliminates the subjectivity of manual judgment, ensuring that each detection can be started under the same environmental conditions. During the detection process, temperature disturbances are actively suppressed to effectively cope with sudden disturbances, thereby maintaining the continuous stability of the detection environment.

[0010] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a flowchart of a temperature control method for detecting thermal conductivity according to Embodiment 1 of the present invention; Figure 2This is a flowchart of another temperature control method for thermal conductivity detection provided in Embodiment 2 of the present invention; Figure 3 This is a schematic diagram of a temperature control device for detecting thermal conductivity according to Embodiment 3 of the present invention; Figure 4 This is a structural block diagram of an electronic device provided in Embodiment 4 of the present invention. Detailed Implementation

[0013] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0014] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, apparatus, product, or terminal device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or terminal devices.

[0015] Example 1 Figure 1 This is a flowchart of a temperature control method for thermal conductivity testing provided in Embodiment 1 of the present invention. This embodiment is applicable to situations where precise temperature control is required during thermal conductivity testing. The method can be executed by a temperature control device for thermal conductivity testing. This device can be implemented in hardware and / or software, and can be integrated into an electronic device with data processing capabilities. Figure 1 As shown, the method includes: S101, acquire real-time temperature data collected by sensors at different locations within the detection chamber.

[0016] Specifically, in this embodiment, multiple temperature sensors are arranged at different locations within the detection chamber, such as the center point of the sample stage, the center point of the lower surface of the sample stage, and the edge of the upper surface of the sample stage. At least four sensors are evenly arranged along the edge of the upper surface of the sample stage. The sample stage is used to hold the material to be tested. During the actual testing process, the detection chamber can be heated, and the thermal conductivity of the material can be measured at the target temperature. Additionally, in this embodiment, a sensor is arranged at the heater outlet of the detection chamber to measure the heater outlet temperature, and a sensor is arranged at a designated location within the detection chamber, such as the center, to measure the ambient temperature. Of course, this embodiment is merely illustrative and does not limit the specific number of temperature sensors arranged within the detection chamber.

[0017] In this embodiment, by arranging multiple temperature sensors, the temperature measurement blind zone caused by a single measuring point in the prior art is solved. It can dynamically and synchronously capture the temperature field changes of the entire sample stage area. Once a temperature fluctuation occurs at a certain location, it can be detected immediately, thus providing accurate data support for subsequent active control and steady-state determination.

[0018] S102 determines the final heating power for the detection cavity based on real-time temperature data and the target detection temperature.

[0019] Optionally, the final heating power for the detection cavity is determined based on real-time temperature data and the target detection temperature, including: acquiring a first temperature difference between the ambient temperature and the target detection temperature, and determining an advance compensation power based on the first temperature difference and a first feedback coefficient; acquiring a second temperature difference between the average temperature of multiple sample stage measuring points and the target detection temperature, and determining a feedback power based on the second temperature difference and a second feedback coefficient; acquiring a third temperature difference between the heater outlet temperature and the target detection temperature, and determining a disturbance compensation power based on the third temperature difference and a third feedback coefficient; and summing the advance compensation power, the feedback power, and the disturbance compensation power as the final heating power for the detection cavity.

[0020] Specifically, in this embodiment, a pre-set target detection temperature T1 is obtained, and a first temperature difference ΔT1 between the target detection temperature T1 and the ambient temperature T2 detected by the sensor is calculated. Based on the first temperature difference and the first feedback coefficient K1, the advance compensation power is calculated: P1 = K1×ΔT1. In this embodiment, the advance compensation power can be used to compensate the basic power required for heating in advance to overcome the pure lag characteristic of the system, that is, to offset the physical defects of slow heating and sluggish response of the system. The reason for the pure hysteresis characteristic in this embodiment is that the detection chamber is located inside the forced-air drying oven. However, the forced-air drying oven is a large iron box with thermal inertia. When it is heated by electricity, it does not heat up instantly, but requires the heating wire to heat up, the air to heat up, and the box body to heat up. This time difference and sluggishness between giving the command and the actual temperature change is the pure hysteresis characteristic. Therefore, when the target detection temperature is set, for example, 100°C, the system knows that 30% of the power is needed to maintain it. So when starting up or switching temperatures, this 30% of the base power is directly given as advance compensation power. Of course, this embodiment is only an example and does not limit the specific value of the advance compensation power.

[0021] Furthermore, in this embodiment, when the temperature of each sample stage measuring point is known, for example, 6 measuring points, the average temperature T3 of the 6 measuring points can be calculated, and the second temperature difference ΔT2 between the target detection temperature T1 and the average temperature T3 can be calculated. Based on the second temperature difference ΔT2 and the second feedback coefficient K2, the feedback power is calculated: P2 = K2 × ΔT2. In this embodiment, instead of using a single-point temperature, the average temperature of multiple sample stage measuring points within the detection chamber is used as feedback. This represents the true overall thermal state of the entire sample detection area, while the second temperature difference objectively reflects whether the overall temperature within the detection chamber is too cold or too hot. Calculating the feedback power based on the second temperature difference is significant because it enables the heating system to have self-correction capabilities. Regardless of external disturbances, if the average temperature deviates from the target detection temperature, the system will automatically calculate the corresponding feedback power to pull it back to the target detection temperature, thereby ensuring the absolute stability of the temperature field within the detection chamber.

[0022] In addition, this embodiment also obtains the third temperature difference ΔT3 between the heater outlet temperature T4 and the target detection temperature T1, and calculates the disturbance compensation power based on the third temperature difference ΔT3 and the third feedback coefficient: P3 = K3 × ΔT3. The disturbance compensation power in this embodiment can be used to compensate for power supply voltage fluctuations and heating element resistance changes. The aforementioned disturbance compensation power P3 is a defensive energy calculated and output in advance by the system to counteract and offset sudden external interference. The disturbance compensation power isolates uncontrollable external or internal factors such as voltage fluctuations and component aging, ensuring that the temperature data transmitted to the feedback control is purely controlled, thereby greatly improving the system's anti-interference capability and final temperature control accuracy. In this embodiment, the sum of the aforementioned advance compensation power, feedback power, and disturbance compensation power is taken as the final heating power of the detection cavity: i.e., P = P1 + P2 + P3. Among them, the advance compensation power P1 is the minimum power consumption to maintain the temperature, the feedback power P2 is the fine adjustment to correct the overall deviation, and the disturbance compensation power P3P is a shock absorber specifically used to absorb and resolve sudden interference. Of course, this embodiment is only an example and does not limit the specific method of determining the final heating power.

[0023] S103 actively regulates the uniformity of the temperature at the sample stage measuring points during the heating process according to the final heating power.

[0024] Optionally, during the heating process according to the final heating power, the temperature of the sample stage measuring points is actively and uniformly controlled, including: determining the maximum temperature difference in the detection chamber based on real-time temperature data during the heating process according to the final heating power; when the maximum temperature difference is greater than the temperature threshold, determining the target control position in the detection chamber based on the sample measuring point temperature, wherein the type of the target control position includes a high-temperature zone position and a low-temperature zone position; and actively and uniformly controlling the temperature of the sample stage measuring points at the target control position.

[0025] Specifically, in this embodiment, during the heating of the detection chamber according to the final heating power obtained above, the maximum temperature difference ΔT_max = max(T) - min(T) in the detection chamber is determined based on the real-time temperature data transmitted by the sensor. When the maximum temperature difference exceeds the temperature threshold ΔT_th, for example, 0.5℃, it indicates that the temperature difference between the coldest and hottest places in the detection chamber is too large, that is, there is obvious local overheating or overcooling, which may affect the measurement accuracy of the thermal conductivity of the sample. At this time, the system will start uniformity control, that is, it will not only rely on adjusting the power of the heater, because simple heating can no longer solve the problem of local uneven heating, but will start the control of uniformity.

[0026] Optionally, the temperature of the sample stage measuring point at the target control position is actively controlled for uniformity, including: when the target control position is within the blowing range of the blower, determining the control angle based on the target control position and the control speed based on the type of the target control position; adjusting the speed of the blower according to the control speed to obtain the target speed, and changing the airflow direction in the detection cavity based on the control angle at the target speed to control the temperature of the sample stage measuring point at the target control position; when the target control position is not within the blowing range of the blower, determining the temperature control method according to the type of the target control position, and controlling the temperature of the sample stage measuring point at the target control position according to the temperature control method, wherein the temperature control method includes heating or cooling.

[0027] In this embodiment, the target control position is determined based on the temperature of each sample measuring point. When the temperature of a sample measuring point exceeds a specified threshold, the measuring point corresponding to that temperature is designated as a high-temperature zone; otherwise, it is designated as a low-temperature zone. When actively controlling the uniformity of the target control position, a blower or heating element can be used. For example, when the target control position is within the blower's range, a blower is used for control. This involves changing the blower's speed and adjusting the angle of the air duct baffle according to the target control position. By enhancing or altering the airflow circulation in the detection chamber, heat is forcibly carried from the high-temperature zone to the low-temperature zone, thereby eliminating spatial temperature differences. However, when the target control position is not within the blower's airflow range, the temperature control method is determined based on the type of the target control position. For example, the temperature control method for the high-temperature zone is cooling, which is achieved by lowering the temperature of the heating element at the target control position; the temperature control method for the low-temperature zone is heating, which is achieved by raising the temperature of the heating element at the target control position. This local temperature compensation is used to achieve uniform active control.

[0028] S104: When the temperature inside the detection cavity is determined to be in a steady state through active uniformity control, the thermal conductivity detection program is started, and the temperature disturbance generated during the detection process is actively suppressed.

[0029] Optionally, when the detection cavity reaches a steady state through active uniformity control, the thermal conductivity detection program is initiated, including: acquiring the temperature change rate of each measuring point within a specified time range and the maximum temperature difference of the detection cavity; when the temperature change rate of each measuring point meets the first constraint condition and the maximum temperature difference meets the second constraint condition, the detection cavity is determined to have reached a steady state, and a detectable signal is generated; the detectable signal is displayed, and the thermal conductivity detection program is initiated based on the user's confirmation command for the detectable signal; wherein, the first constraint condition includes the temperature change rate being less than the temperature change rate threshold and the duration being not less than a first duration, and the second constraint condition includes the maximum temperature difference being less than the maximum steady-state temperature difference and the duration being not less than a second duration.

[0030] Specifically, in this embodiment, after the detection cavity is actively adjusted for uniformity, the temperature change rate (dT / dt) of each measuring point is continuously monitored within a specified time range, as well as the maximum temperature difference (T_max) of the detection cavity. When the temperature change rate of each measuring point is less than the temperature change rate threshold ε_T (ε_T is preferably 0.05℃ / min) and the duration is not less than τ_1 (τ_1 is preferably 5 minutes), the temperature change rate of each measuring point satisfies the first constraint condition. In addition, when the maximum temperature difference (T_max) is less than the maximum steady-state temperature difference (ΔT is preferably 0.5℃) and the duration is not less than τ_2 (τ_2 is preferably 3 minutes), the maximum temperature difference satisfies the second constraint condition. When both the temperature change rate and the maximum temperature difference of each measuring point satisfy the corresponding constraint conditions, it is determined that the detection cavity has reached a steady state. At this time, a detectable signal is generated and displayed on the front-end interface to prompt the operator or automatically trigger the thermal conductivity detection program. Of course, this embodiment is only an example and does not limit the specific triggering method of the thermal conductivity detection program.

[0031] Optionally, active suppression of temperature disturbances generated during the detection process includes: automatically recording the opening duration when an opening event is detected during the detection process, calculating the heat loss compensation amount based on the opening duration, and increasing the heating power based on the heat loss compensation amount to actively suppress the temperature disturbances caused by the opening event; when abnormal measuring points with sample stage measuring point temperatures deviating from the steady-state window are detected during the detection process, determining the disturbance type based on the number of abnormal measuring points, and actively suppressing the temperature disturbances caused by the abnormal measuring points based on the temperature adjustment strategy determined by the disturbance type, wherein the disturbance type includes local disturbances or global disturbances.

[0032] In this embodiment, the disturbance signals generated during the detection process are continuously monitored, and the temperature disturbance signals generated during the detection process are actively suppressed. For example, the opening and closing status of the cabinet door can be detected by a door magnetic sensor. When an opening event is detected, the opening time is automatically recorded. Since the heat loss caused per unit opening time is known, this embodiment can calculate the heat loss compensation amount based on the opening time, determine the heating power required to provide the above heat loss compensation amount, and actively add the calculated heating power to the final heating power to achieve rapid recovery of the temperature inside the detection chamber, thereby avoiding the temperature drop inside the detection chamber due to opening the door during the detection process. In addition, a steady-state window can be preset in this embodiment. For example, when the target detection temperature is 100℃, the steady-state window is ±0.5℃, then 99.5℃ to 100.5℃ is the normal range. However, when an abnormal measurement point is detected during the detection process where the temperature of the sample stage measurement point deviates from the steady-state window, the abnormal measurement point corresponding to the temperature of that sample stage measurement point is identified. When only a few adjacent measurement points have abnormal temperatures, while the temperature of most other areas is normal, the disturbance type is identified as a local disturbance. The cause of a local disturbance may be that the chamber door is briefly opened, the sample itself releases or absorbs heat, or a local malfunction of a heating element. When the temperature of most measurement points is abnormal, for example, when the temperature deviates in one direction (rising or falling simultaneously), the disturbance type is identified as a global disturbance. The cause of a global disturbance may be a sudden change in ambient temperature, fluctuations in power supply voltage, or changes in the overall power of the cooling / heating system.

[0033] It should be noted that this embodiment actively suppresses temperature disturbances caused by abnormal measuring points based on the temperature adjustment strategy determined by the disturbance type. For example, when the disturbance is localized, zonal compensation can be activated, meaning the system only adjusts the heating or cooling unit in the area where the abnormality occurs (e.g., the heating wire or airflow of a certain vent in a specific area), quickly bringing the temperature of that localized area back to the normal range without affecting other stable areas. This is similar to turning on the heater in a corner of a room when it's cold. When the disturbance is global, global power adjustment can be activated, meaning the system adjusts the total power output of the main heating or cooling system to bring the temperature of the entire detection chamber back to the target value. Of course, this embodiment is merely an example and does not limit the specific methods of active suppression.

[0034] The technical solution of this invention determines the heating power of the temperature collected at different locations within the detection chamber, thereby avoiding the response lag and temperature overshoot caused by a single measurement point temperature. During the heating process, the temperature of each measurement point is actively adjusted for uniformity to adapt to complex working conditions. Automatic steady-state determination eliminates the subjectivity of manual judgment, ensuring that each detection can be started under the same environmental conditions. During the detection process, temperature disturbances are actively suppressed to effectively cope with sudden disturbances, thereby maintaining the continuous stability of the detection environment.

[0035] Example 2 Figure 2 This is a flowchart of another temperature control method for thermal conductivity detection provided by an embodiment of the present invention. Based on the above embodiment, this embodiment, after actively suppressing temperature disturbances generated during the detection process, further includes: performing steady-state verification on the detection chamber; when the steady-state verification passes, directly generating a recoverable detection signal to prompt the user to continue the thermal conductivity detection procedure; when the steady-state verification fails, generating a detection anomaly alarm and displaying the alarm in a specified manner. For example... Figure 2 As shown, the method includes: S201, acquire real-time temperature data collected by sensors at different locations within the detection chamber.

[0036] S202 determines the final heating power for the detection cavity based on real-time temperature data and the target detection temperature.

[0037] Optionally, the final heating power for the detection cavity is determined based on real-time temperature data and the target detection temperature, including: acquiring a first temperature difference between the ambient temperature and the target detection temperature, and determining an advance compensation power based on the first temperature difference and a first feedback coefficient; acquiring a second temperature difference between the average temperature of multiple sample stage measuring points and the target detection temperature, and determining a feedback power based on the second temperature difference and a second feedback coefficient; acquiring a third temperature difference between the heater outlet temperature and the target detection temperature, and determining a disturbance compensation power based on the third temperature difference and a third feedback coefficient; and summing the advance compensation power, the feedback power, and the disturbance compensation power as the final heating power for the detection cavity.

[0038] S203 actively regulates the uniformity of the temperature at the sample stage measuring points during the heating process according to the final heating power.

[0039] Optionally, during the heating process according to the final heating power, the temperature of the sample stage measuring points is actively and uniformly controlled, including: determining the maximum temperature difference in the detection chamber based on real-time temperature data during the heating process according to the final heating power; when the maximum temperature difference is greater than the temperature threshold, determining the target control position in the detection chamber based on the sample measuring point temperature, wherein the type of the target control position includes a high-temperature zone position and a low-temperature zone position; and actively and uniformly controlling the temperature of the sample stage measuring points at the target control position.

[0040] Optionally, the temperature of the sample stage measuring point at the target control position is actively controlled for uniformity, including: when the target control position is within the blowing range of the blower, determining the control angle based on the target control position and the control speed based on the type of the target control position; adjusting the speed of the blower according to the control speed to obtain the target speed, and changing the airflow direction in the detection cavity based on the control angle at the target speed to control the temperature of the sample stage measuring point at the target control position; when the target control position is not within the blowing range of the blower, determining the temperature control method according to the type of the target control position, and controlling the temperature of the sample stage measuring point at the target control position according to the temperature control method, wherein the temperature control method includes heating or cooling.

[0041] S204: When the temperature inside the detection cavity is determined to be in a steady state through active uniformity control, the thermal conductivity detection program is started, and the temperature disturbance generated during the detection process is actively suppressed.

[0042] Optionally, when the detection cavity reaches a steady state through active uniformity control, the thermal conductivity detection program is initiated, including: acquiring the temperature change rate of each measuring point within a specified time range and the maximum temperature difference of the detection cavity; when the temperature change rate of each measuring point meets the first constraint condition and the maximum temperature difference meets the second constraint condition, the detection cavity is determined to have reached a steady state, and a detectable signal is generated; the detectable signal is displayed, and the thermal conductivity detection program is initiated based on the user's confirmation command for the detectable signal; wherein, the first constraint condition includes the temperature change rate being less than the temperature change rate threshold and the duration being not less than a first duration, and the second constraint condition includes the maximum temperature difference being less than the maximum steady-state temperature difference and the duration being not less than a second duration.

[0043] Optionally, active suppression of temperature disturbances generated during the detection process includes: automatically recording the opening duration when an opening event is detected during the detection process, calculating the heat loss compensation amount based on the opening duration, and increasing the heating power based on the heat loss compensation amount to actively suppress the temperature disturbances caused by the opening event; when abnormal measuring points with sample stage measuring point temperatures deviating from the steady-state window are detected during the detection process, determining the disturbance type based on the number of abnormal measuring points, and actively suppressing the temperature disturbances caused by the abnormal measuring points based on the temperature adjustment strategy determined by the disturbance type, wherein the disturbance type includes local disturbances or global disturbances.

[0044] S205 performs steady-state verification on the detection chamber. When the steady-state verification passes, a recoverable detection signal is directly generated to prompt the user to continue the thermal conductivity detection procedure.

[0045] Specifically, in this embodiment, after actively suppressing the temperature disturbance generated during the detection process, the detection cavity will be checked again for steady state. The steady state check is specifically to re-determine whether the detection cavity has reached steady state again within a specified time range. The determination is based on the temperature change rate of each measuring point and the maximum temperature difference in the detection cavity. The specific determination method is roughly the same as the initial determination method described above, and will not be repeated in this embodiment.

[0046] When the steady-state verification passes, that is, when the steady state is reached again within the specified time range, a recoverable detection signal will be generated, such as "The current detection chamber temperature meets the standard, and the detection can continue." Specifically, the recoverable detection signal can be displayed in the form of voice or image. The user can then know that the current detection conditions are met based on the displayed signal and continue the thermal conductivity detection program, thereby avoiding misidentification caused by manual identification of the detection environment.

[0047] S206. When the steady-state verification fails, an alarm message for abnormal detection is generated and displayed in a specified manner.

[0048] Specifically, if the detection cavity fails to reach a steady state again within a specified time range, the steady-state verification is deemed to have failed. In this case, an abnormal alarm will be generated to inform the user that although the temperature disturbance generated during the detection process is actively suppressed, the detection cavity has not reached a steady state within the specified time range. The ideal environment for thermal conductivity detection cannot be achieved in the current detection cavity. In this embodiment, the generated abnormal alarm will be displayed, which is roughly the same as the display method of the recoverable detection signal mentioned above. The abnormal alarm can also be displayed using images or voice.

[0049] Among them, after displaying the detection abnormality alarm prompts or recoverable detection signals, users can promptly know the detection environment inside the detection chamber based on the displayed alarm prompts or recoverable detection signals, avoiding the ineffective heat loss caused by frequent opening of the chamber door. Furthermore, the detection abnormality alarm prompts can also facilitate users to promptly repair software or hardware faults that occur during the detection process, thereby further improving the detection efficiency.

[0050] The technical solution of this invention determines the heating power of the temperature collected at different locations within the detection chamber, thereby avoiding the response lag and temperature overshoot caused by a single measurement point temperature. During the heating process, the temperature of each measurement point is actively adjusted for uniformity to adapt to complex working conditions. Automatic steady-state determination eliminates the subjectivity of manual judgment, ensuring that each detection can be started under the same environmental conditions. During the detection process, temperature disturbances are actively suppressed to effectively cope with sudden disturbances, thereby maintaining the continuous stability of the detection environment.

[0051] Example 3 Figure 3 This is a schematic diagram of a temperature control device for detecting thermal conductivity, provided as an embodiment of the present invention. Figure 3 As shown, the device includes: a temperature data acquisition module 310, a final heating power determination module 320, a uniformity active control module 330, and an active suppression module 340.

[0052] The temperature data acquisition module 310 is used to acquire real-time temperature data collected by sensors at different locations within the detection chamber. The real-time temperature data includes ambient temperature, heater outlet temperature, and temperatures at multiple sample stage measuring points. The final heating power determination module 320 is used to determine the final heating power for the detection cavity based on real-time temperature data and the target detection temperature; The uniformity active control module 330 is used to actively control the temperature uniformity of the sample stage measuring points during the heating process according to the final heating power. The active suppression module 340 is used to start the thermal conductivity detection program when the detection cavity reaches a steady state through active uniformity control, and to actively suppress the temperature disturbance generated during the detection process.

[0053] Optionally, the final heating power determination module 320 is used to obtain the first temperature difference between the ambient temperature and the target detection temperature, and to determine the advance compensation power based on the first temperature difference and the first feedback coefficient. The average temperature of multiple sample stage measuring points is obtained, and the second temperature difference between the average temperature and the target detection temperature is obtained. The feedback power is determined based on the second temperature difference and the second feedback coefficient. The third temperature difference between the heater outlet temperature and the target detection temperature is obtained, and the disturbance compensation power is determined based on the third temperature difference and the third feedback coefficient. The sum of the advance compensation power, feedback power, and disturbance compensation power is used as the final heating power of the detection cavity.

[0054] Optionally, the uniformity active control module 330 is used to determine the maximum temperature difference in the detection chamber based on real-time temperature data during the heating process according to the final heating power. When the maximum temperature difference is greater than the temperature threshold, the target control position in the detection cavity is determined based on the temperature of the sample measuring point. The types of target control positions include high temperature zone positions and low temperature zone positions. The temperature of the sample stage measuring points at the target control position is actively and uniformly controlled.

[0055] Optionally, the uniformity active control module 330 is also used to determine the control angle based on the target control position and the control speed based on the type of the target control position when the target control position is within the blower's blowing range. The blower speed is adjusted according to the control speed to obtain the target speed, and the airflow direction in the detection cavity is changed based on the control angle at the target speed to control the temperature of the sample stage measuring point at the target control position. When the target control position is not within the blowing range of the blower, the temperature control method is determined according to the type of the target control position, and the temperature of the sample stage measuring point under the target control position is controlled according to the temperature control method, wherein the temperature control method includes heating or cooling.

[0056] Optionally, the active suppression module 340 includes a thermal conductivity detection program start unit, used to obtain the temperature change rate of each measuring point within a specified time range and the maximum temperature difference of the detection cavity; When the rate of temperature change at each measuring point meets the first constraint condition and the maximum temperature difference meets the second constraint condition, it is determined that the detection cavity has reached a steady state and a detectable signal is generated. The detectable signal is displayed, and the thermal conductivity detection program is started based on the user's confirmation command of the detectable signal. The first constraint includes a temperature change rate less than a temperature change rate threshold and a duration of not less than a first duration; the second constraint includes a maximum temperature difference less than a maximum steady-state temperature difference and a duration of not less than a second duration.

[0057] Optionally, the active suppression module 340 includes an active suppression unit, which is used to automatically record the door opening duration when a door opening event is detected during the detection process, calculate the heat loss compensation amount based on the door opening duration, and increase the heating power based on the heat loss compensation amount, so as to actively suppress the temperature disturbance caused by the door opening event. When abnormal measurement points are detected during the detection process where the temperature of the sample stage measurement points deviates from the steady-state window, the disturbance type is determined based on the number of abnormal measurement points, and the temperature adjustment strategy determined by the disturbance type is used to actively suppress the temperature disturbance caused by the abnormal measurement points. The disturbance type includes local disturbance or global disturbance.

[0058] Optionally, the device also includes a steady-state verification module for performing steady-state verification on the detection chamber. When the steady-state verification passes, a recoverable detection signal is directly generated to prompt the user to continue the thermal conductivity detection procedure. When steady-state verification fails, an alarm message for abnormal detection is generated and displayed in a specified manner.

[0059] The temperature control device for thermal conductivity detection provided in this embodiment of the invention can execute the temperature control method for thermal conductivity detection provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0060] Example 4 Figure 4 A schematic diagram of an electronic device 10, which can be used to implement embodiments of the present invention, is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0061] The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the invention described and / or claimed herein.

[0062] like Figure 4 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0063] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other electronic devices through computer networks such as the Internet and / or various telecommunications networks.

[0064] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with 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 special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as temperature control methods for thermal conductivity detection.

[0065] That is, to acquire real-time temperature data collected by sensors at different locations within the detection chamber, including ambient temperature, heater outlet temperature, and temperatures at multiple sample stage measuring points; The final heating power for the detection chamber is determined based on real-time temperature data and the target detection temperature; During the heating process according to the final heating power, the temperature of the sample stage measuring points is actively and uniformly controlled. When the temperature inside the detection chamber is determined to be in a steady state through active uniformity control, the thermal conductivity detection program is started, and the temperature disturbances generated during the detection process are actively suppressed.

[0066] In some embodiments, the temperature control method for thermal conductivity detection may be implemented as a computer program tangibly contained in 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 on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the temperature control method for thermal conductivity detection described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the temperature control method for thermal conductivity detection by any other suitable means (e.g., by means of firmware).

[0067] Various embodiments of the apparatuses and techniques described above herein can be implemented in digital electronic circuit devices, integrated circuit devices, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), device-on-a-chip (SoC) devices, complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable device including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage device, at least one input device, and at least one output device, and transmitting data and instructions to the storage device, the at least one input device, and the at least one output device.

[0068] Computer programs for implementing the temperature control method for thermal conductivity detection of this invention can be written in any combination of one or more programming languages. These computer programs can be provided to the processor of a general-purpose computer or a special-purpose computer, such that when executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer programs can be executed entirely on the machine, partially on the machine, or as a standalone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0069] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution apparatus, device, or electronic device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage electronics, magnetic storage electronics, or any suitable combination thereof.

[0070] To provide interaction with a user, the devices and techniques described herein can be implemented on an electronic device having: a display device (e.g., a touchscreen) for displaying information to the user; and buttons through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0071] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0072] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A temperature control method for detecting thermal conductivity, characterized in that, The method includes: The real-time temperature data collected by sensors at different locations within the detection chamber includes ambient temperature, heater outlet temperature, and temperatures at multiple sample stage measuring points. The final heating power for the detection cavity is determined based on the real-time temperature data and the target detection temperature. During the heating process according to the final heating power, the temperature of the sample stage measuring points is actively and uniformly controlled. When the detection cavity reaches a steady state through active uniformity control, the thermal conductivity detection program is initiated, and temperature disturbances generated during the detection process are actively suppressed.

2. The method according to claim 1, characterized in that, The step of determining the final heating power for the detection cavity based on the real-time temperature data and the target detection temperature includes: The first temperature difference between the ambient temperature and the target detection temperature is obtained, and the advance compensation power is determined based on the first temperature difference and the first feedback coefficient. The average temperature of the multiple sample stage measuring points is obtained, and the second temperature difference between the average temperature and the target detection temperature is obtained. The feedback power is determined based on the second temperature difference and the second feedback coefficient. The third temperature difference between the heater outlet temperature and the target detection temperature is obtained, and the disturbance compensation power is determined based on the third temperature difference and the third feedback coefficient. The sum of the advance compensation power, the feedback power, and the disturbance compensation power is taken as the final heating power of the detection cavity.

3. The method according to claim 1, characterized in that, The process of actively regulating the uniformity of the temperature at the sample stage measuring points during heating according to the final heating power includes: During the heating process according to the final heating power, the maximum temperature difference in the detection chamber is determined based on the real-time temperature data; When the maximum temperature difference is greater than the temperature threshold, the target control position in the detection cavity is determined according to the temperature of the sample measuring point, wherein the type of the target control position includes a high temperature zone position and a low temperature zone position; The temperature of the sample stage measuring point at the target control position is actively and uniformly controlled.

4. The method according to claim 3, characterized in that, The active uniformity control of the temperature at the sample stage measuring point under the target control position includes: When the target control position is within the blower's airflow range, the control angle is determined based on the target control position, and the control speed is determined based on the type of the target control position. The blower speed is adjusted according to the control speed to obtain the target speed, and the airflow direction in the detection cavity is changed based on the control angle at the target speed to control the temperature of the sample stage measuring point at the target control position. When the target control position is not within the blowing range of the blower, the temperature control method is determined according to the type of the target control position, and the temperature of the sample stage measuring point under the target control position is controlled according to the temperature control method, wherein the temperature control method includes heating or cooling.

5. The method according to claim 3, characterized in that, The step of initiating the thermal conductivity detection program when the detection cavity reaches a steady state through active uniformity control includes: Obtain the temperature change rate at each measuring point within a specified time range and the maximum temperature difference of the detection cavity; When the rate of temperature change at each measuring point satisfies the first constraint condition and the maximum temperature difference satisfies the second constraint condition, it is determined that the detection cavity has reached a steady state and a detectable signal is generated. The detectable signal is displayed, and the thermal conductivity detection program is started based on the user's confirmation command of the detectable signal; The first constraint condition includes that the temperature change rate is less than the temperature change rate threshold and the duration is not less than a first duration, and the second constraint condition includes that the maximum temperature difference is less than the maximum steady-state temperature difference and the duration is not less than a second duration.

6. The method according to claim 1, characterized in that, The active suppression of temperature disturbances generated during the detection process includes: When a door opening event is detected during the detection process, the door opening duration is automatically recorded. The heat loss compensation amount is calculated based on the door opening duration, and the heating power is increased based on the heat loss compensation amount to actively suppress the temperature disturbance caused by the door opening event. When abnormal measurement points are detected during the detection process where the temperature of the sample stage measurement points deviates from the steady-state window, the disturbance type is determined according to the number of abnormal measurement points, and the temperature disturbance caused by the abnormal measurement points is actively suppressed according to the temperature adjustment strategy determined by the disturbance type. The disturbance type includes local disturbance or global disturbance.

7. The method according to claim 1, characterized in that, After actively suppressing the temperature disturbances generated during the detection process, the method further includes: The detection cavity is subjected to steady-state verification. When the steady-state verification passes, a recoverable detection signal is directly generated to prompt the user to continue the thermal conductivity detection procedure. When the steady-state verification fails, an alarm message for detection anomaly is generated and displayed in a specified manner.

8. A temperature control device for detecting thermal conductivity, characterized in that, The device includes: The temperature data acquisition module is used to acquire real-time temperature data collected by sensors at different locations within the detection chamber. The real-time temperature data includes ambient temperature, heater outlet temperature, and temperatures at multiple sample stage measuring points. The final heating power determination module is used to determine the final heating power for the detection cavity based on the real-time temperature data and the target detection temperature. The uniformity active control module is used to actively control the temperature uniformity of the sample stage measuring points during the heating process according to the final heating power. An active suppression module is used to initiate the thermal conductivity detection program when the detection cavity reaches a steady state through active uniformity control, and to actively suppress temperature disturbances generated during the detection process.

9. An electronic device, characterized in that, The electronic device includes: One or more processors; Storage device for storing one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in any one of claims 1-7.

10. A storage medium for computer-executable instructions, wherein a computer program is stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1-7.

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