A constant temperature wind control method based on non-contact temperature measurement and distance measurement

Abstract

The application discloses a constant temperature wind control method based on non-contact temperature measurement and distance measurement, a non-contact temperature measurement and distance measurement electronic module is arranged at a central position of a front part of a constant temperature wind generating device, and the non-contact temperature measurement and distance measurement electronic module is used to determine a target object surface temperature, an ambient temperature and a target object distance. Thus, the target object surface temperature error caused by the distance between the target object and the ambient temperature can be determined in combination with the target object distance and the ambient temperature, the target object surface temperature error is compensated, and the current accurate actual surface temperature of the target object is determined. Therefore, the method can adjust the constant temperature wind temperature according to the accurate actual surface temperature of the target object, the accuracy of the constant temperature wind temperature adjustment is ensured, the control precision of the constant temperature wind generating device is improved, and problems such as resource waste and equipment loss of the constant temperature wind generating device are avoided.

Description

Technical Field

[0001] This application relates to the field of temperature control technology, and in particular to a constant temperature air control method based on non-contact temperature and distance measurement. Background Technology

[0002] Existing constant-temperature air generating devices, such as but not limited to hair dryers, air conditioners, and electric vehicle thermal management systems, all have heating and blowing elements, enabling them to control temperature and generate stable, constant-temperature air. To ensure that the target object receives truly constant-temperature air, it is necessary to monitor the actual temperature state of the target object in real time. Based on this actual temperature state, it is crucial to determine whether the desired constant-temperature effect has been achieved, or what adjustments are needed to avoid overheating or overcooling.

[0003] In the prior art, the true temperature state of the target object can be determined by setting a temperature sensor in the constant temperature air generating device, thereby determining how to adjust the temperature of the constant temperature air generated by the constant temperature air generating device.

[0004] However, in practice, several complex factors make measuring the true temperature of the target object extremely challenging. For example, changes in the ambient temperature around the temperature sensor and the distance between the constant-temperature air generator and the target object can affect the heat transfer rate. When the heating element is working, the ambient temperature at the sensor location rises significantly, thus affecting the sensor's temperature measurement accuracy. Inability to accurately measure the true temperature of the target object will severely impact the performance and reliability of the constant-temperature air generator. Specifically, the main effects are as follows:

[0005] 1) Decreased control precision: The most obvious result is a significant drop in temperature control precision. If adjustments are made based on incorrect temperature data, even the most advanced algorithms cannot guarantee that the provided constant temperature airflow will meet the preset standards, thus affecting the user experience.

[0006] 2) Resource waste and equipment wear and tear: Long-term temperature measurement errors can lead to malfunctions in automatic temperature control and feedback loops, resulting in unnecessary energy consumption and even equipment wear and tear.

[0007] There is currently no effective solution to the technical problem in the existing technology that the true temperature of the target object of the constant temperature air generating device cannot be accurately measured, resulting in low control accuracy, waste of resources and equipment wear and tear. Summary of the Invention

[0008] The embodiments of this disclosure provide a constant temperature air control method, device, storage medium, and constant temperature air generating device based on non-contact temperature and distance measurement, so as to at least solve the technical problem in the prior art that the true temperature of the target object of the constant temperature air generating device cannot be accurately measured, resulting in low control accuracy, resource waste, and equipment wear and tear of the constant temperature air generating device.

[0009] According to one aspect of the present disclosure, a constant temperature air control method based on non-contact temperature and distance measurement is provided. The method is applied to a constant temperature air generating device, which includes: a non-contact temperature and distance measurement electronic module, a heating element, a blowing element, and a heat insulation component for heat insulation of the non-contact temperature and distance measurement electronic module. The non-contact temperature and distance measurement electronic module is disposed at the center of the front of the constant temperature air generating device. The constant temperature air generating device is used to generate constant temperature air for a target object. The method includes: acquiring the target object surface temperature, ambient temperature, and target object distance currently monitored by the non-contact temperature and distance measurement electronic module; performing error compensation on the target object surface temperature based on the target object distance and the ambient temperature to determine the current actual surface temperature of the target object; and adjusting the temperature of the constant temperature air generated by the constant temperature air generating device based on the current actual surface temperature of the target object.

[0010] According to another aspect of the present disclosure, a storage medium is also provided, the storage medium including a stored program, wherein, when the program is executed, a processor performs any of the methods described above.

[0011] According to another aspect of the present disclosure, a constant temperature air generating device is also provided. The device includes a non-contact temperature and distance measuring electronic module, a heating element, a blowing element, and a heat-insulating component for insulating the non-contact temperature and distance measuring electronic module. The non-contact temperature and distance measuring electronic module is disposed at the center of the front of the constant temperature air generating device. The device is used to generate constant temperature air for a target object. Specifically, the device is used to: acquire the target object surface temperature, ambient temperature, and target object distance currently monitored by the non-contact temperature and distance measuring electronic module; perform error compensation on the target object surface temperature based on the target object distance and the ambient temperature to determine the current actual surface temperature of the target object; and adjust the generated constant temperature air temperature based on the current actual surface temperature of the target object.

[0012] According to another aspect of the present disclosure, a constant temperature air control device based on non-contact temperature and distance measurement is also provided. This device controls a constant temperature air generating device to generate constant temperature air for a target object. The constant temperature air generating device includes: a non-contact temperature and distance measurement electronic module, a heating element, a blowing element, and a heat-insulating component for heat insulation of the non-contact temperature and distance measurement electronic module. The non-contact temperature and distance measurement electronic module is disposed at the center of the front of the constant temperature air generating device and includes: an acquisition module for acquiring the target object surface temperature, ambient temperature, and target object distance currently monitored by the non-contact temperature and distance measurement electronic module; a compensation module for performing error compensation on the target object surface temperature based on the target object distance and ambient temperature to determine the current actual surface temperature of the target object; and an adjustment module for adjusting the temperature of the constant temperature air generated by the constant temperature air generating device based on the current actual surface temperature of the target object.

[0013] In this embodiment, a non-contact temperature and distance measuring electronic module is centrally located at the front of the constant-temperature air generating device. This module determines the surface temperature of the target object, the ambient temperature, and the distance to the target object. By combining the target object distance and ambient temperature, the error in the target object's surface temperature caused by these factors can be determined, and error compensation can be applied to the target object's surface temperature to determine its accurate current actual surface temperature. Therefore, this method can adjust the constant-temperature air temperature based on the accurate actual surface temperature of the target object, ensuring the accuracy of temperature regulation and improving the control precision of the constant-temperature air generating device. This avoids resource waste and equipment wear and tear on the constant-temperature air generating device. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0015] Figure 1 This is a structural diagram for implementing the constant temperature air generating device according to Embodiment 1 of this disclosure;

[0016] Figure 2 This is a flowchart illustrating the constant temperature air control method based on non-contact temperature and distance measurement according to the first aspect of Embodiment 1 of this disclosure.

[0017] Figure 3A This is a schematic diagram of the sensor setup in a constant temperature air generating device according to Embodiment 1 of this disclosure;

[0018] Figure 3B This is a schematic diagram of the sensor setup in a constant temperature air generating device according to Embodiment 1 of this disclosure;

[0019] Figure 4 This is a schematic diagram of a constant temperature air control device based on non-contact temperature and distance measurement, according to the first aspect of Embodiment 2 of this disclosure. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this disclosure, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure 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 this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises 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 apparatus.

[0022] Example 1

[0023] According to this embodiment, a constant temperature air control method based on non-contact temperature and distance measurement is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Also, although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than that shown here.

[0024] According to the first aspect of this embodiment, a constant temperature air control method based on non-contact temperature and distance measurement is provided, which can be applied to... Figure 1 The constant temperature air generating device 100 shown can be used to implement the method. Figure 2 A flowchart illustrating the method is shown below. (Refer to...) Figure 2 As shown, the method includes:

[0025] S202: Obtain the target surface temperature, ambient temperature, and target distance monitored by the current non-contact temperature and distance measuring electronic module;

[0026] S204: Based on the target distance and ambient temperature, perform error compensation on the target surface temperature to determine the target's current actual surface temperature; and

[0027] S206: Adjust the temperature of the constant temperature air generated by the constant temperature air generating device according to the current actual surface temperature of the target object.

[0028] In this embodiment, reference Figure 1 As shown, the constant temperature air generating device 100 includes a non-contact temperature and distance measuring electronic module 101, a heating element, a heat insulation component, and a blowing element 104. The heat insulation component is used to insulate the non-contact temperature and distance measuring electronic module. That is, the heat insulation component can be disposed between the heating element and the non-contact temperature and distance measuring electronic module to achieve the purpose of heat insulation for the non-contact temperature and distance measuring electronic module. The heating element may include... Figure 1 Heating elements 103a and 103b are included. The heat insulation component may include... Figure 1 The system includes a first heat-insulating component 102a, a second heat-insulating component 102b, and a third heat-insulating component 102c. The first heat-insulating component 102a and the second heat-insulating component 102b are disposed in the area between the heating element and the non-contact temperature and distance measuring electronic module 101 for further heat insulation. The third heat-insulating component 102c is disposed between the first heat-insulating component 102a and the second heat-insulating component 102b, and is capable of insulating the area of ​​the non-contact temperature and distance measuring electronic module 101 except for the side facing the air outlet.

[0029] from Figure 1 As can be seen, the non-contact temperature and distance measuring electronic module 101 is located in the center of the front of the constant temperature wind generating device 100, which facilitates the monitoring of the distance between the device and the target (target distance), the target temperature, and the ambient temperature.

[0030] The constant temperature air generating device 100 can acquire the target surface temperature, ambient temperature, and target distance monitored by the non-contact temperature and distance measuring electronic module 101 (S202). The ambient temperature represents the temperature of the environment in which the non-contact temperature and distance measuring electronic module 101 is located. The target surface temperature refers to the temperature of the target surface directly measured by the non-contact temperature and distance measuring electronic module 101 through a sensor (e.g., an infrared temperature sensor). The target distance refers to the distance between the sensor used to acquire the target surface temperature and the target temperature, as measured by the non-contact temperature and distance measuring electronic module 101.

[0031] Then, the constant temperature air generating device 100 can compensate for the error in the surface temperature of the target object based on the distance to the target object and the ambient temperature, and determine the current actual surface temperature of the target object (S204). In other words, the constant temperature air generating device 100 can combine the measured distance to the target object and the ambient temperature to determine the error in the measured surface temperature of the target object caused by the distance to the target object and the ambient temperature, and then compensate for the error in the surface temperature of the target object to determine the current actual surface temperature of the target object.

[0032] In this process, the above steps and the following step S206, the constant temperature air generating device 100, can all be implemented by its own controller (MCU). That is, the MCU in the constant temperature air generating device can obtain the surface temperature of the target object, the ambient temperature, and the distance to the target object, and determine the current actual surface temperature of the target object based on the ambient temperature and the distance to the target object. Then, the temperature is adjusted based on the actual surface temperature.

[0033] Finally, the constant temperature air generating device can adjust the temperature of the constant temperature air it generates according to the actual surface temperature (S206). How the constant temperature air temperature is adjusted according to the actual surface temperature will be explained later.

[0034] As described in the background section, several complex factors make measuring the true temperature of a target object extremely challenging in practice. For example, changes in the ambient temperature around the temperature sensor and variations in the distance between the constant-temperature air generator and the target object can affect the heat transfer rate. When the heating element is operating, the ambient temperature at the sensor location rises significantly, thus affecting the sensor's temperature measurement accuracy. Inability to accurately measure the true temperature of the target object will severely impact the performance and reliability of the constant-temperature air generator, leading to technical problems such as low control accuracy, resource waste, and equipment wear and tear.

[0035] Therefore, this method places a non-contact temperature and distance measuring electronic module at the center of the front of the constant temperature air generating device. This module determines the surface temperature of the target object, the ambient temperature, and the distance to the target object. By combining the target object distance and ambient temperature, the error in the target object's surface temperature caused by these factors can be determined, and error compensation can be applied to the target object's surface temperature to determine its accurate current actual surface temperature. Thus, this method can adjust the constant temperature air temperature based on the accurate actual surface temperature of the target object, ensuring the accuracy of temperature regulation and improving the control precision of the constant temperature air generating device. This avoids resource waste and equipment wear and tear on the constant temperature air generating device.

[0036] Optionally, the non-contact temperature and distance measuring electronic module includes an infrared temperature sensor, a distance sensor, and a temperature sensor. The infrared temperature sensor and the distance sensor are at the same distance from the target object. The infrared temperature sensor and the distance sensor are located on the side of the non-contact temperature and distance measuring electronic module facing the target object, while the temperature sensor is located on the side of the non-contact temperature and distance measuring electronic module facing the interior of the constant temperature air generating device. Furthermore, the operation of acquiring the target object surface temperature, ambient temperature, and target object distance monitored by the non-contact temperature and distance measuring electronic module includes: acquiring the target object surface temperature monitored by the infrared temperature sensor, the target object distance monitored by the distance sensor, and the ambient temperature monitored by the temperature sensor.

[0037] refer to Figure 3A As shown, the non-contact temperature and distance measurement electronic module 101 may include an infrared temperature sensor, a distance sensor, and a temperature sensor. From... Figure 3A As can be seen, the infrared temperature sensor and the distance sensor are positioned on the side of the non-contact temperature and distance measuring electronic module 101 facing the target object. This allows the infrared temperature sensor to measure the surface temperature of the target object, and the distance sensor to measure the distance to the target object. The temperature sensor is located on the back side of the non-contact temperature and distance measuring electronic module 101, opposite to the infrared temperature sensor.

[0038] Continue to refer to Figure 3B In other words, the side of the non-contact temperature and distance measuring electronic module 101 facing the target object can be called the front side of the non-contact temperature and distance measuring electronic module 101, and the side facing the air blowing element 104 can be called the back side of the non-contact temperature and distance measuring electronic module 101. Both the infrared temperature sensor and the distance sensor are located on the front side, and they must be coaxially mounted (ensuring the distance measurement direction is consistent with the temperature measurement direction). Both must be heat-insulated to prevent direct hot air blowing. The temperature sensor is located on the back side. The infrared temperature sensor can use a narrow field-of-view optical lens (field of view ≤10°) and a metal heat-insulating outer cylinder to reduce thermal shock interference and improve measurement stability. Both the distance sensor and the temperature sensor can be used to compensate for errors in the temperature measured by the infrared temperature sensor.

[0039] The infrared temperature sensor can be an infrared single-point temperature sensor or an infrared array temperature sensor, and the distance sensor can be an infrared TOF sensor.

[0040] In this embodiment, the constant temperature air generating device 100 can synchronously acquire the target surface temperature measured by the infrared temperature sensor, the ambient temperature measured by the temperature sensor, and the target distance measured by the distance sensor at predetermined intervals. Since the target object may move rapidly during the use of the constant temperature air generating device 100, the predetermined interval can be set to a shorter duration, for example, 100ms. That is, every 100ms, triggered by the MCU's timer, the device acquires the target surface temperature measured by the infrared temperature sensor, the ambient temperature measured by the temperature sensor, and the target distance measured by the distance sensor, and determines the actual surface temperature of the target object using the target surface temperature, ambient temperature, and target distance. In other words, error compensation can be performed every 100ms to obtain the actual surface temperature of the target object, and the constant temperature air temperature can be adjusted based on the actual surface temperature.

[0041] Optionally, before performing error compensation on the target object surface temperature based on the target object distance and ambient temperature, the method further includes: preprocessing the target object surface temperature monitored by the infrared temperature sensor, the target object distance monitored by the distance sensor, and the ambient temperature monitored by the temperature sensor; and wherein,

[0042] The preprocessing operation for the surface temperature of the target object monitored by the infrared temperature sensor includes:

[0043] First-order low-pass filtering is applied to the surface temperature of the target object;

[0044] The preprocessing operation for the distance to the target object detected by the distance sensor includes:

[0045] If the distance to the target is determined to be within the preset effective distance range, then the target distance is determined as the effective distance; determine the n nearest effective distances and the average of the n effective distances;

[0046] The preprocessing of the ambient temperature detected by the temperature sensor includes:

[0047] Determine whether the temperature difference between the current ambient temperature detected by the temperature sensor and the ambient temperature detected by the temperature sensor last time exceeds a preset temperature value; if so, use the ambient temperature detected by the temperature sensor last time as the ambient temperature detected by the temperature sensor now.

[0048] Specifically, the constant temperature air generating device 100 can currently obtain the raw temperature value of the target object's surface temperature measured by the infrared temperature sensor. (Unit: °C), the raw value D of the distance to the target object measured by the distance sensor (unit: cm), and the raw temperature value of the ambient temperature measured by the temperature sensor. (Unit: °C). Then, the constant temperature air generating device 100 can preprocess the data measured by the three sensors.

[0049] First, it can be determined whether the original value D of the target object distance is within the effective distance range. If so, the currently obtained target object distance is determined to be the effective distance. The following explanation uses the constant temperature air generating device 100 in a hair dryer scenario as an example. That is, the specific values ​​of the effective distance range, etc., in the examples below are applicable to the hair dryer scenario. If the constant temperature air generating device 100 is used in other scenarios, it can be modified according to business requirements.

[0050] In the hair dryer scenario, the effective distance range can be set from 1cm to 40cm. If the original value D exceeds the effective distance range, it is marked as "invalid distance". The constant temperature air generating device 100 can then pause error compensation and output a prompt such as "too far or too close" to the user using the constant temperature air generating device 100.

[0051] Then, the original temperature value of the target object's surface temperature can be obtained. The original value of the target distance D and the original temperature value of the ambient temperature. Preprocessing is performed.

[0052] Specifically, it can be the original temperature value of the target object's surface temperature. Perform a first-order low-pass filter to obtain the filtered temperature value. The formula is:

[0053] (1)

[0054] in, It can be set to 0.3. This is the filtered temperature value obtained by performing a first-order low-pass filter on the original temperature value of the target object's surface obtained in the previous test. The first-order low-pass filter filters out the high-frequency noise in the temperature measurement caused by airflow fluctuations from the hot air blower.

[0055] Specifically, a sliding window mean filter can be applied to the original distance D to the target object. That is, the average of the n most recent valid distances (for example, n can be set to 5) can be used as the filtered distance value to the target object. The formula is:

[0056] (2)

[0057] Where D1~D5 are the original values ​​of the most recent n valid distances. If the currently acquired target distance is a valid distance, the most recent n valid distances include the currently acquired target distance. Sliding window mean filtering can filter out noise related to distance jumps measured by the TOF distance sensor module due to reflections from the target surface.

[0058] Specifically, it can be the original temperature value of the ambient temperature. Perform threshold filtering if the current Compared to the last time it was obtained If the temperature difference between the two values ​​is ≥2℃, then the previously obtained value should be used. The value is used as the current ambient temperature to avoid interference from the hot air temperature.

[0059] Optionally, the operation of performing error compensation on the surface temperature of the target object based on the distance to the target object and the ambient temperature to determine the current actual surface temperature of the target object includes:

[0060] The surface temperature of the target object is first compensated for based on the distance to the target object to obtain a first compensated temperature; the first compensated temperature is then compensated for based on the ambient temperature to obtain a second compensated temperature; and the actual surface temperature is determined based on the second compensated temperature.

[0061] Optionally, the operation of performing a first error compensation on the surface temperature of the target object based on the distance to the target object, to obtain the first compensated temperature, includes:

[0062] Based on the target distance, reference distance, and real-time influence coefficient, the formula is used... The surface temperature of the target object is first compensated for to determine the temperature after the first compensation. In the formula... The temperature after the first compensation. Indicates the surface temperature of the target object. This is the real-time impact coefficient. As the reference distance, This represents the distance to the target object, and where,

[0063] The steps to determine the real-time impact coefficient include:

[0064] Based on the pre-calibrated baseline influence coefficient, the emissivity of the target object, and the ambient temperature, the formula is used... To determine the real-time impact coefficient, the formula includes... Indicates the real-time impact coefficient. The baseline influence coefficient is ε, where ε is the emissivity of the target object. The ambient temperature.

[0065] Specifically, the first error compensation for the surface temperature of the target object is to filter out the temperature measurement error caused by the target object being too far away or too close.

[0066] This manual is based on the core principle of infrared thermometry (Stephen-Boltzmann law), which measures the target's radiant energy. With distance It is inversely proportional to the square of, that is The derived distance compensation formula is the formula mentioned above:

[0067] (3)

[0068] In formula (3) It is used to eliminate temperature measurement errors related to the position of the target object. The temperature after the first compensation. This represents the surface temperature of the target object. The reference distance D0 refers to the distance at which the infrared temperature sensor achieves the highest accuracy in measuring the surface temperature of the target object. This reference distance D0 can be determined through pre-calibration; in this embodiment, D0 can be 15cm. Real-time influence coefficient. Used to represent the relationship between real-time distance and temperature error.

[0069] The real-time impact coefficient can be determined using the following formula:

[0070] (4)

[0071] Benchmark influence coefficient It can be obtained by pre-calibration, and the emissivity ε corresponding to the target object is usually 0.98. The ambient temperature after pretreatment. For ambient temperature Correction term (for every 1°C deviation of ambient temperature from 25°C, Adjust by 1%.

[0072] It should be noted that in the hair dryer scenario, different hair colors may lead to different emissivity. The constant temperature air generating device 100 can provide buttons for adjusting the emissivity, allowing users to adjust it themselves. For example, preset emissivity levels can be set, each corresponding to a different emissivity (each preset emissivity can correspond to different hair colors). Users can adjust the emissivity to the preset level using the corresponding button. The controller determines the real-time influence coefficient based on the adjusted emissivity, and then determines the temperature after the first compensation.

[0073] The following is based on the distance to the target object. surface temperature of the target object Example of error compensation (first compensation):

[0074] Assumption , (Greater than the baseline distance D05cm) , 8:

[0075] 1. Calculate the real-time impact coefficient.

[0076] .

[0077] 2. Calculate the distance compensation amount.

[0078] ;

[0079] 3. Determine the temperature after the first compensation. (Due to the increased distance, the radiation energy decreases, and the original temperature reading is too low, so it needs to be compensated upwards).

[0080] Optionally, the operation of performing a second error compensation on the first compensated temperature based on the ambient temperature to obtain the second compensated temperature includes:

[0081] Based on the ambient temperature, the sensor temperature of the infrared thermometer used to acquire the surface temperature of the target object is estimated; and based on the sensor temperature, the sensor reference temperature, and the temperature compensation coefficient, a second compensated temperature is determined, wherein the sensor reference temperature represents the temperature at which the infrared thermometer is not affected by environmental interference.

[0082] Specifically, error compensation using ambient temperature can be achieved by first estimating the sensor temperature of the infrared temperature sensor itself based on the ambient temperature, using the following formula:

[0083] (5)

[0084] In formula (5), The ambient temperature is 0.005, and the power influence coefficient is 0.005 (this power influence coefficient was obtained experimentally: for every 100W increase in power, the sensor temperature increases by 0.5℃). The power of the constant temperature air generator can be read through the controller MCU (e.g., 1500W for high power setting and 800W for low power setting).

[0085] Then, based on the sensor temperature, the second compensated temperature is determined using the following formula:

[0086] (6)

[0087] In formula (6), This is the temperature after the second compensation. This is the temperature after the first compensation. This is the temperature compensation coefficient. In this embodiment, for example... =0.003. For the sensor temperature, in formula (6) (Unit: °C) represents the sensor reference temperature. That is, when the infrared temperature sensor is at its reference temperature, it is less susceptible to interference from ambient temperature and less prone to measurement errors caused by ambient temperature. In this embodiment, for example… =25.

[0088] The following is based on ambient temperature. Temperature after first compensation Example of error compensation (secondary compensation):

[0089] Continuing with the example of the first compensation above, let's assume the operating power of the constant temperature air generating device 100 is... , :

[0090] 1. Calculate the sensor temperature of the infrared temperature sensor itself. .

[0091] 2. Recalculate the environmental compensation amount: .

[0092] 3. Finally (If the sensor temperature is higher than the reference temperature, downward compensation is required to eliminate local temperature rise interference.)

[0093] Among them, the second compensated temperature can be The actual surface temperature of the identified target object. Or, to determine the current... Compared with the previously determined actual surface temperature The difference between ,like (Exceeding the normal heating rate), then the second compensated temperature Make corrections to obtain the corrected temperature. Corrected temperature This is used to determine the actual surface temperature of the target object, thereby avoiding temperature jumps caused by compensation calculation errors.

[0094] The air outlet of the constant temperature air generator 100 may generate localized high temperatures, which could cause the infrared temperature sensor itself to overheat, thereby affecting the temperature readings of the infrared temperature sensor. Too high. The above steps are based on ambient temperature. Predict sensor temperature Then based on the sensor temperature The temperature measurement error of the infrared temperature sensor is compensated, thereby dynamically correcting the temperature measurement interference caused by the ambient temperature.

[0095] Optionally, adjusting the temperature of the constant-temperature air generated by the constant-temperature air generating device according to the current actual surface temperature of the target object includes:

[0096] The temperature of the constant temperature air generated by the constant temperature air generating device is adjusted according to the preset reasonable temperature range and the current actual surface temperature of the target object; and / or the temperature of the constant temperature air generated by the constant temperature air generating device is adjusted according to the preset target temperature and the current actual surface temperature of the target object.

[0097] After performing the aforementioned steps to eliminate temperature measurement errors from the infrared temperature sensor, the actual surface temperature of the target object can be determined. Based on this actual surface temperature, the temperature of the constant-temperature air generated by the constant-temperature air generator can be adjusted. For example, a suitable temperature range can be set to 30℃~50℃. When the actual surface temperature is below 30℃, the temperature of the constant-temperature air generated by the constant-temperature air generator can be adjusted to 30℃. When the actual surface temperature is above 50℃, the temperature of the constant-temperature air generated by the constant-temperature air generator can be adjusted to 50℃.

[0098] For example, in a hair dryer scenario, there could be n temperature settings. If the actual surface temperature is below 30 degrees Celsius... If the surface temperature reaches 30°C, increase the temperature setting by one level and check if it does. If it does, no further adjustment is needed; otherwise, continue increasing the temperature setting until 30°C is reached. If the actual surface temperature exceeds 50°C... If so, you can lower the temperature setting by one level and then check if the actual surface temperature reaches 50℃. If it reaches 50℃, there is no need to adjust the temperature setting further; if it does not reach 50℃, continue to lower the setting until it does.

[0099] In addition to setting a reasonable temperature range, a target temperature can also be set. When the actual surface temperature is higher or lower than the target temperature, the temperature of the constant temperature air generated by the constant temperature air generating device 100 is adjusted until the actual surface temperature approaches the target temperature after adjustment.

[0100] It should be noted that the benchmark influence coefficient and temperature compensation coefficient The constant temperature air generating device needs to be pre-calibrated before leaving the factory. The calibration methods are given below.

[0101] one, Calibration (distance-related baseline influence coefficient)

[0102] Environment: 25℃ standard laboratory environment, target object is a standard blackbody with an emissivity of 0.98.

[0103] Steps: Fix the constant temperature air generator 100 at a distance of 15cm (reference distance) from the target object (distance sensor measures D=15cm), heat the target object to the predetermined temperature, for example, heat to 25℃, 50℃, and 80℃, and record the temperature at each setting. ,calculate Deviation from the actual surface temperature of the target object By recording And the actual surface temperature of the target object is substituted into the above formula (3) to determine the... Approaching 0℃ (e.g.) (within the range of -0.5℃ to 0.5℃) At this time This is the baseline influence coefficient (usually 0.01~0.03℃ / cm). 2 ).

[0104] two, Calibration (temperature compensation coefficient)

[0105] Environment: The constant temperature air generator 100 is placed in a temperature-controlled environmental chamber, and the ambient temperature is maintained within the environmental chamber. To achieve temperatures of, for example, 25°C, 40°C, and 60°C, the constant temperature air generating device 100 is fixed at a distance of 15cm (reference distance) from the target object (D=15cm measured by the distance sensor), thereby eliminating the influence of distance.

[0106] Steps: In each Below, record the sensor temperature. The infrared temperature sensor measures ,calculate Deviation from the actual surface temperature of the target object Fitting bias and The linear relationship, the slope is... (Typically 0.001~0.005 / K).

[0107] It should also be noted that, in order to address compensation deviations caused by sensor aging and material changes, the constant temperature air generating device 100 can periodically optimize the reference influence coefficient based on feedback from the heating effect of the constant temperature air generating device 100. First, the theoretical heating rate can be predetermined. The theoretical heating rate is the rate at which the constant-temperature air generating device 100 raises the surface temperature of the target object at a preset power. For example, with a power of 1500W, the surface temperature of the target object should rise by 0.5℃ per second. Then, a comparison can be made. If the actual heating rate is 10% lower than the theoretical heating rate, then... Increase the preset value; if the actual heating rate is 10% higher than the theoretical heating rate, then... Reduce preset values ​​to ensure It is designed for long-term adaptation to real-world scenarios. The preset value can be 0.05. This value is derived theoretically, showing that a change of 0.05 has a minimal impact on the compensation amount, meeting the requirements for overall accuracy control. In prototype testing, a step size of 0.05 showed optimal performance in terms of "correction speed - stability - final accuracy." This value ensures... The self-optimization can accurately correct long-term deviations without affecting the heating stability of the constant temperature air generating device 100, making it a reasonable choice that combines theory and engineering.

[0108] In addition, refer to Figure 1 As shown, according to a second aspect of this embodiment, a storage medium is provided. The storage medium includes a stored program, wherein, when the program is executed, a processor performs any of the methods described above.

[0109] Therefore, according to this embodiment, this method can compensate for the error in the temperature measured by the infrared temperature sensor by using the distance sensor to measure the distance to the target object. Furthermore, a reference influence coefficient representing the relationship between the target object distance and the temperature measurement error of the infrared temperature sensor is predetermined. This reference influence coefficient is then adjusted in real-time based on the operating status of the constant temperature air generator to obtain a real-time influence coefficient. This real-time influence coefficient is then used for error compensation, thereby more accurately removing distance-related temperature measurement errors. Additionally, a temperature sensor is used to compensate for the temperature measurement error of the infrared temperature sensor, further eliminating the temperature measurement error caused by ambient temperature. Therefore, this method can accurately determine the surface temperature of the target object, thereby precisely adjusting the temperature, ensuring the accuracy of constant temperature air temperature regulation, improving the control precision of the constant temperature air generator, and avoiding resource waste and equipment wear and tear.

[0110] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0111] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0112] Example 2

[0113] Figure 4 A constant-temperature air control device based on non-contact temperature and distance measurement according to the first aspect of this embodiment is shown. This constant-temperature air control device corresponds to the method described according to the first aspect of Embodiment 1. The constant-temperature air control device based on non-contact temperature and distance measurement is used to control a constant-temperature air generating device to generate constant-temperature air onto a target object. The constant-temperature air generating device includes: a non-contact temperature and distance measurement electronic module, a heating element, a blowing element, and a heat-insulating component for heat insulation of the non-contact temperature and distance measurement electronic module. The non-contact temperature and distance measurement electronic module is disposed at the center of the front of the constant-temperature air generating device and includes:

[0114] The acquisition module 401 is used to acquire the surface temperature of the target object, the ambient temperature, and the distance to the target object as monitored by the current non-contact temperature and distance measuring electronic module.

[0115] Compensation module 402 is used to compensate for errors in the surface temperature of the target object based on the distance to the target object and the ambient temperature, thereby determining the current actual surface temperature of the target object; and

[0116] The adjustment module 403 is used to adjust the temperature of the constant temperature air generated by the constant temperature air generating device according to the current actual surface temperature of the target object.

[0117] Optionally, the non-contact temperature and distance measuring electronic module includes an infrared temperature sensor, a distance sensor, and a temperature sensor. The infrared temperature sensor and the distance sensor are at the same distance from the target object. The infrared temperature sensor and the distance sensor are located on the side of the non-contact temperature and distance measuring electronic module facing the target object, while the temperature sensor is located on the side of the non-contact temperature and distance measuring electronic module facing the interior of the constant temperature air generating device; and wherein,

[0118] The acquisition module 401 is used to acquire the surface temperature of the target object monitored by the infrared temperature sensor, the distance of the target object monitored by the distance sensor, and the ambient temperature monitored by the temperature sensor.

[0119] Optionally, before performing error compensation on the surface temperature of the target object based on the target object distance and ambient temperature, the constant temperature air control device further includes: a preprocessing module 404, used to preprocess the target object surface temperature monitored by the infrared temperature sensor, the target object distance monitored by the distance sensor, and the ambient temperature monitored by the temperature sensor; specifically, the preprocessing module 404 is used to perform a first-order low-pass filter on the target object surface temperature; specifically, the preprocessing module 404 is used to determine the target object distance as an effective distance when it is determined that the target object distance is within a preset effective distance range; and to determine the n nearest effective distances and determine the average value of the n effective distances; specifically, the preprocessing module 404 is used to determine whether the temperature difference between the ambient temperature monitored by the current temperature sensor and the ambient temperature monitored by the previous temperature sensor exceeds a preset temperature value, and if so, to use the ambient temperature monitored by the previous temperature sensor as the ambient temperature monitored by the current temperature sensor.

[0120] Optionally, the compensation module 402 is specifically used to perform a first error compensation on the surface temperature of the target object based on the distance to the target object, to obtain a first compensated temperature; to perform a second error compensation on the first compensated temperature based on the ambient temperature, to obtain a second compensated temperature; and to determine the actual surface temperature based on the second compensated temperature.

[0121] Optionally, the compensation module 402 is specifically used to calculate the compensation based on the target distance, the reference distance, and the real-time influence coefficient using a formula. The surface temperature of the target object is first compensated for to determine the temperature after the first compensation. In the formula... The temperature after the first compensation. Indicates the surface temperature of the target object. This is the real-time impact coefficient. As the reference distance, The target distance is represented by a table, and the compensation module 402 is specifically used to calculate the distance based on the pre-calibrated reference influence coefficient, the emissivity of the target object, and the ambient temperature using a formula. Determine the real-time impact coefficient, wherein, in the formula Indicates the real-time impact coefficient. The baseline influence coefficient is ε, where ε is the emissivity of the target object. The ambient temperature.

[0122] Optionally, the compensation module 402 is specifically used to estimate the sensor temperature of the infrared temperature sensor used to obtain the surface temperature of the target object based on the ambient temperature; and to determine the second compensated temperature based on the sensor temperature, the sensor reference temperature and the temperature compensation coefficient, wherein the sensor reference temperature represents the temperature at which the infrared temperature sensor is not affected by the environment.

[0123] Optionally, the adjustment module 403 is specifically used to adjust the temperature of the constant temperature air generated by the constant temperature air generating device according to a preset reasonable temperature range and the current actual surface temperature of the target object; and / or to adjust the temperature of the constant temperature air generated by the constant temperature air generating device according to a preset target temperature and the current actual surface temperature of the target object.

[0124] Therefore, according to this embodiment, the distance between the target object and the distance sensor can be used to compensate for the temperature measured by the infrared temperature sensor. Furthermore, a reference influence coefficient representing the relationship between the target object distance and the temperature measurement error of the infrared temperature sensor is predetermined. This reference influence coefficient is adjusted in real-time based on the operating status of the constant temperature air generator to obtain a real-time influence coefficient. Error compensation is then performed using this real-time influence coefficient, thereby more accurately eliminating distance-related temperature measurement errors. Additionally, a temperature sensor is used to compensate for the temperature measured by the infrared temperature sensor, further eliminating temperature measurement errors caused by ambient temperature. Therefore, this method can accurately determine the surface temperature of the target object, enabling precise temperature adjustment and ensuring the accuracy of constant temperature air temperature regulation. This improves the control precision of the constant temperature air generator and avoids resource waste and equipment wear and tear.

[0125] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0126] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0127] It should be noted that the constant temperature air control device based on non-contact temperature and distance measurement in Example 2, the constant temperature air generating device in Example 1, and the constant temperature air control method based on non-contact temperature and distance measurement in Example 1 belong to the same inventive concept, solve the same technical problem, and achieve the same technical effect. The constant temperature air control device based on non-contact temperature and distance measurement in Example 2 and the constant temperature air generating device in Example 1 can implement all the methods in Example 1. The similarities will not be repeated here.

[0128] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0129] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0130] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0131] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0132] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A constant temperature air control method based on non-contact temperature and distance measurement, characterized in that, The method is applied to a constant-temperature air generating device, which includes: a non-contact temperature and distance measuring electronic module, a heating element, a blowing element, and a heat-insulating component for heat insulation of the non-contact temperature and distance measuring electronic module. The non-contact temperature and distance measuring electronic module is disposed at the center of the front of the constant-temperature air generating device. The constant-temperature air generating device is used to generate constant-temperature air for a target object. The method includes: The non-contact temperature and distance measuring electronic module acquires the surface temperature of the target object, the ambient temperature, and the distance to the target object, as monitored by the non-contact temperature and distance measuring electronic module. The ambient temperature is used to represent the temperature of the environment in which the non-contact temperature and distance measuring electronic module is located. Based on the distance to the target object and the ambient temperature, error compensation is performed on the surface temperature of the target object to determine its current actual surface temperature; and The temperature of the constant-temperature air generated by the constant-temperature air generating device is adjusted according to the current actual surface temperature of the target object; and the operation of determining the current actual surface temperature of the target object by performing error compensation on the surface temperature of the target object based on the distance to the target object and the ambient temperature includes: The surface temperature of the target object is compensated for a first error based on the distance to the target object to obtain a first compensated temperature; the first compensated temperature is compensated for a second error based on the ambient temperature to obtain a second compensated temperature; and the actual surface temperature is determined based on the second compensated temperature. Furthermore, the operation of performing a first error compensation on the surface temperature of the target object based on the distance to the target object, to obtain the first compensated temperature, includes: Based on the target distance, reference distance, and real-time influence coefficient, the formula is used... The surface temperature of the target object is subjected to a first error compensation to determine the temperature after the first compensation, wherein, in the formula... The temperature after the first compensation. This indicates the surface temperature of the target object. This is the real-time impact coefficient. The reference distance is... This indicates the distance to the target object.

2. The method according to claim 1, characterized in that, The non-contact temperature and distance measuring electronic module includes an infrared temperature sensor, a distance sensor, and a temperature sensor. The infrared temperature sensor and the distance sensor are at the same distance from the target object. The infrared temperature sensor and the distance sensor are disposed on the side of the non-contact temperature and distance measuring electronic module facing the target object. The temperature sensor is disposed on the side of the non-contact temperature and distance measuring electronic module facing the interior of the constant temperature air generating device. The operation of acquiring the target surface temperature, ambient temperature, and target distance monitored by the non-contact temperature and distance measuring electronic module includes: The infrared temperature sensor detects the surface temperature of the target object, the distance sensor detects the distance to the target object, and the temperature sensor detects the ambient temperature.

3. The method according to claim 2, characterized in that, Before performing error compensation on the surface temperature of the target object based on the target object distance and the ambient temperature, the method further includes: The surface temperature of the target object monitored by the infrared temperature sensor, the distance to the target object monitored by the distance sensor, and the ambient temperature monitored by the temperature sensor are preprocessed; and the preprocessing operation of the surface temperature of the target object monitored by the infrared temperature sensor includes: The surface temperature of the target object is subjected to a first-order low-pass filter; The operation of preprocessing the distance to the target object detected by the distance sensor includes: When it is determined that the distance to the target object is within a preset effective distance range, the distance to the target object is determined to be an effective distance; and Determine the n nearest valid distances to the current location, and determine the average value of the n valid distances; The operation of preprocessing the ambient temperature monitored by the temperature sensor includes: Determine whether the temperature difference between the current ambient temperature detected by the temperature sensor and the previous ambient temperature detected by the temperature sensor exceeds a preset temperature value; If so, the ambient temperature detected by the temperature sensor in the previous instance shall be used as the ambient temperature detected by the temperature sensor in the current instance.

4. The method according to claim 1, characterized in that, The operation of determining the real-time influence coefficient includes: Based on the pre-calibrated baseline influence coefficient, the emissivity of the target object, and the ambient temperature, the formula is used... Determine the real-time impact coefficient, wherein, in the formula This represents the real-time impact coefficient. Here, ε is the baseline influence coefficient, and ε is the emissivity corresponding to the target object. The ambient temperature is mentioned.

5. The method according to claim 1, characterized in that, The operation of performing a second error compensation on the first compensated temperature based on the ambient temperature to obtain the second compensated temperature includes: Based on the ambient temperature, estimate the sensor temperature of the infrared thermometer used to acquire the surface temperature of the target object; and The second compensated temperature is determined based on the sensor temperature, the sensor reference temperature, and the temperature compensation coefficient, wherein the sensor reference temperature represents the temperature at which the infrared temperature sensor is not affected by environmental interference.

6. The method according to claim 1, characterized in that, The operation of adjusting the temperature of the constant-temperature air generated by the constant-temperature air generating device according to the current actual surface temperature of the target object includes: The temperature of the constant-temperature air generated by the constant-temperature air generating device is adjusted according to a preset reasonable temperature range and the current actual surface temperature of the target object; and / or The temperature of the constant temperature air generated by the constant temperature air generating device is adjusted according to the preset target temperature and the current actual surface temperature of the target object.

7. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, the method described in any one of claims 1 to 6 is performed by a processor.

8. A constant temperature air generating device, characterized in that, The constant temperature air generating device includes a non-contact temperature and distance measuring electronic module, a heating element, a blowing element, and a heat insulation component for heat insulation of the non-contact temperature and distance measuring electronic module. The non-contact temperature and distance measuring electronic module is located at the center of the front of the constant temperature air generating device. The constant temperature air generating device is used to generate constant temperature air for a target object. Specifically, the device is used to: acquire the target object surface temperature, ambient temperature, and target object distance currently monitored by the non-contact temperature and distance measuring electronic module; perform error compensation on the target object surface temperature based on the target object distance and the ambient temperature to determine the current actual surface temperature of the target object; and adjust the generated constant temperature air temperature based on the current actual surface temperature of the target object. Furthermore, the device is used to: perform a first error compensation on the target object surface temperature based on the target object distance to obtain a first compensated temperature; perform a second error compensation on the first compensated temperature based on the ambient temperature to obtain a second compensated temperature; and determine the actual surface temperature based on the second compensated temperature; and, based on the target object distance, a reference distance, and a real-time influence coefficient, use a formula... The surface temperature of the target object is subjected to a first error compensation to determine the temperature after the first compensation, wherein, in the formula... The temperature after the first compensation. This indicates the surface temperature of the target object. This is the real-time impact coefficient. The reference distance is... This indicates the distance to the target object.

9. A constant temperature air control device based on non-contact temperature and distance measurement, used to control a constant temperature air generating device to generate constant temperature air for a target object, the constant temperature air generating device comprising: A non-contact temperature and distance measuring electronic module, a heating element, a blowing element, and a heat-insulating component for insulating the non-contact temperature and distance measuring electronic module, wherein the non-contact temperature and distance measuring electronic module is disposed at the center of the front of the constant temperature air generating device, characterized in that it includes: The acquisition module is used to acquire the surface temperature of the target object, the ambient temperature, and the distance to the target object as monitored by the non-contact temperature and distance measuring electronic module. The compensation module is used to perform error compensation on the surface temperature of the target object based on the distance to the target object and the ambient temperature, and to determine the current actual surface temperature of the target object; and The adjustment module is used to adjust the temperature of the constant temperature air generated by the constant temperature air generating device according to the current actual surface temperature of the target object; and wherein the compensation module is used to perform a first error compensation on the surface temperature of the target object based on the distance to the target object, to obtain a first compensated temperature; perform a second error compensation on the first compensated temperature based on the ambient temperature, to obtain a second compensated temperature; and determine the actual surface temperature based on the second compensated temperature; and wherein the compensation module is used to, based on the distance to the target object, the reference distance, and the real-time influence coefficient, use a formula... The surface temperature of the target object is subjected to a first error compensation to determine the temperature after the first compensation, wherein, in the formula... The temperature after the first compensation. This indicates the surface temperature of the target object. This is the real-time impact coefficient. The reference distance is... This indicates the distance to the target object.

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