Temperature measurement self-adaptive compensation method and system, ear thermometer, readable storage medium

Abstract

The application discloses a kind of temperature measurement self-adaptive compensation method, system, ear thermometer and readable storage medium, method includes preheating temperature measurement sensor after thermometer is opened, adjust temperature control to reach stable set temperature and can be measured;Select measurement stops heating, and thermometer is close to the measured person temperature measurement part and starts measurement;Get the parameter signal change rate of temperature measurement sensor in cooling process, convert parameter signal change rate into compensation temperature;Get the signal amount volatility of temperature measurement sensor, when the signal amount of temperature measurement sensor is in stable state, to obtain measured temperature, to calculate target temperature with compensation temperature and measured temperature;Temperature measurement self-adaptive compensation system includes temperature measurement sensor, processor, display.The scheme can effectively improve the convergence characteristics of the measured target temperature data and the reliability of target temperature data.

Description

Technical Field

[0001] This invention relates to the field of temperature measurement technology, and in particular to a temperature measurement adaptive compensation method, system, ear thermometer, and readable storage medium. Background Technology

[0002] The statements in this section are merely background information related to this application and do not necessarily constitute prior art.

[0003] Medical infrared ear thermometers utilize the principle that any object above absolute zero (-273℃) emits infrared radiation. A sensor receives this infrared radiation to obtain temperature data. Infrared thermometry, also known as radiation thermometry, typically uses thermoelectric or photoelectric detectors as the detection element. Infrared temperature measurement systems are relatively simple, capable of measuring large areas or a single point on an object; they can be portable or stationary, and are easy to use. Their manufacturing process is simple, with low cost. They do not contact the object being measured, offering advantages such as short response time, no interference with the measured temperature field, long service life, and ease of operation. An infrared thermopile sensor consists of two modules: a thermopile and a thermistor. The thermopile's main function is to convert infrared radiation into a parameter signal, while the thermistor's main function is to detect the sensor's current temperature.

[0004] Figure 1 This demonstrates the process of measuring human body temperature using an infrared thermopile sensor. The infrared thermopile sensor consists of many thermocouples connected in series to form a thermopile, creating a hot junction and a cold junction. The cold junction temperature is the temperature measured by a thermistor, while the hot junction is the end of the object being measured. The thermal difference between the hot and cold junctions generates a corresponding induced thermoelectric potential (TEP). With the cold junction temperature and the TEP, the temperature of the object can be calculated.

[0005] When the above temperature measurement technology is used in actual temperature conditions, it was found that when there is a difference between the sensor temperature and the human ear temperature, and when the ear thermometer sensor probe is inserted into the ear of the person being measured, the cold end of the sensor will be suddenly affected by the heat of the ear, causing violent fluctuations. This will cause the thermoelectric potential to fluctuate as well. If the object temperature is measured and calculated during this fluctuation, there will be a large deviation.

[0006] To address the aforementioned issues, a preheated sensor was introduced. A heating coil is encapsulated inside the sensor to control its temperature. Once the sensor temperature is controlled to be close to that of the human body, it is inserted into the ear for measurement, thus avoiding the sensor being affected by ear temperature fluctuations. This resolves the uncertainty and bias caused by the influence of ear temperature on ordinary thermopile sensors.

[0007] However, because the preheating sensor requires PID control technology for heating, the thermal stack signal can be interfered with by the control signal, leading to measurement errors. Therefore, heating control needs to be turned off during measurement. Since the heating temperature is higher than the ambient temperature, the sensor will enter a natural cooling state. In this natural cooling state, due to differences in ambient temperature, the sensor cools at different rates, resulting in measurement errors at the sensor signal terminal.

[0008] Furthermore, when using some handheld infrared thermometers, such as forehead thermometers and ear thermometers, abnormal measurement results may occur if the user does not place the thermometer stably or if their hand shakes during the measurement process. In particular, when an ear thermometer is inserted into the ear canal of the person being measured, temperature measurement errors may occur due to the measurement technique or the sensor's own signal vibration.

[0009] In view of this, how to solve the problems of measurement error and jitter error caused by different cooling rates of the sensor in the existing preheating temperature measurement technology has become the research topic to be solved by this invention. Summary of the Invention

[0010] The purpose of this invention is to provide a temperature measurement adaptive compensation method, system, ear thermometer, and readable storage medium.

[0011] To achieve the above objectives, a first aspect of the present invention proposes a temperature measurement adaptive compensation method for adaptive compensation during thermometer temperature measurement. The innovation lies in that the method comprises:

[0012] After the thermometer is turned on, it preheats the temperature sensor, adjusts the temperature control to reach a stable set temperature, and then indicates that it is ready to measure.

[0013] After selecting the measurement option, stop heating and bring the thermometer close to the subject's temperature measurement area to begin the measurement.

[0014] Obtain the rate of change of the parameter signal of the temperature sensor during the cooling process, and convert the rate of change of the parameter signal into a compensation temperature;

[0015] The signal fluctuation of the temperature sensor is obtained. When the signal of the temperature sensor is in a stable state, the measured temperature is obtained, and the target temperature is calculated by compensating for the temperature difference between the measured temperature and the actual temperature.

[0016] The second aspect of the present invention provides a temperature adaptive compensation system for temperature adaptive compensation in the method described in the first aspect of the present invention. The innovation of the present invention is that the temperature adaptive compensation system includes a temperature sensor, a processor, and a display.

[0017] The temperature sensor contains a heating coil, which preheats the temperature sensor.

[0018] The processor is used to acquire the rate of change of the parameter signal of the temperature sensor during the cooling process, convert the rate of change of the parameter signal into a compensation temperature; acquire the signal fluctuation of the temperature sensor, acquire the measured temperature when the signal of the temperature sensor is in a stable state, and calculate the target temperature by using the compensation temperature and the measured temperature.

[0019] The display is used to show the target temperature.

[0020] A third aspect of the present invention provides an ear thermometer, the ear thermometer comprising a housing and a temperature measurement adaptive compensation system as described in the second aspect of the present invention, mounted on the housing.

[0021] A fourth aspect of the invention provides a readable storage medium storing a control program that, when executed by a processor, causes the processor to perform the steps of the method described in the first aspect of the invention.

[0022] The relevant content of this invention is explained as follows:

[0023] 1. By implementing the above-mentioned technical solution of the present invention, the existing preheating temperature measurement technology addresses the problems of measurement errors and jitter errors caused by different cooling rates of sensors at the sensor signal end. An innovative temperature measurement adaptive compensation method, a temperature measurement adaptive compensation system, an ear thermometer with a temperature measurement adaptive compensation system, and a readable storage medium storing a control program for executing the temperature measurement adaptive compensation method are designed. This effectively improves the convergence characteristics and reliability of the measured target temperature data. In the adaptive compensation method for temperature measurement, when taking a temperature with a thermometer, the thermometer is turned on and the temperature sensor is preheated. The temperature control is adjusted to reach a stable set temperature and a prompt indicating that measurement is possible is displayed. After selecting the measurement, heating is stopped, and the thermometer is placed close to the subject's temperature measurement area to begin measurement. The rate of change of the parameter signal of the temperature sensor during the cooling process is obtained and converted into a compensation temperature to compensate for the target temperature, avoiding the phenomenon of underestimation. The convergence characteristics of the data are effectively improved compared with conventional ear thermometers using the same preheating technology, especially in improving the problem of underestimation of the temperature in the first measurement immediately after the ear thermometer has finished heating in low-temperature environments. The signal fluctuation of the temperature sensor is obtained, and the measured temperature is obtained when the signal of the temperature sensor is in a stable state. This effectively avoids the probability of measurement errors caused by the user's measurement method or the sensor's own signal jitter, improves the reliability and accuracy of temperature measurement, and reduces the probability of misjudgment. Finally, the target temperature is calculated by the compensation temperature and the measured temperature, which greatly improves the accuracy of the final target temperature obtained by the user. The temperature adaptive compensation system incorporates a temperature sensor with an encapsulated heating coil, a processor for executing the temperature adaptive compensation method, and a display for showing the target temperature. This forms a complete system capable of reliably acquiring and displaying the user's correct body temperature, thus providing equipment support for high-quality, high-precision body temperature measurement. Similarly, an ear thermometer with a temperature adaptive compensation system provides users with a fast and accurate measurement device, enabling them to obtain accurate body temperature data and providing more reliable parameters for diagnosing changes in physical condition caused by temperature variations. A control program for executing the temperature adaptive compensation method is stored in a readable storage medium, allowing the processor of the temperature adaptive compensation system to effectively execute this program.

[0024] 2. In the first aspect of the above technical solution, the formula for calculating the rate of change K of the parameter signal is K = (T n -T n+1 ) / t; where T n T is the initial semaphore. n+1 The termination signal is represented by t, which is the settling time from when the thermometer stops heating until the measured temperature is acquired. After the thermometer stops heating, it enters a natural cooling state, at which point the start signal T is read. nThe termination signal T is acquired after the stabilization time between when the thermometer stops heating and when the measured temperature is obtained. n+1 This step is used to obtain the rate of change of parameter signals with higher reference value as the basis for converting into compensation temperature, thus providing more accurate basic data for subsequent calculations.

[0025] 3. In the first aspect of the above technical solution, in the step of converting the rate of change of the parameter signal K into a compensated temperature value, a correction coefficient y is introduced to convert the rate of change of the parameter signal K into a compensated temperature value, y = (T obj1 -T obj0 ) / K, where T obj0 For the measured temperature, T obj1 The target temperature is set. This step is used to more accurately and quickly convert the rate of change of the parameter signal into the compensation temperature.

[0026] 4. In the first aspect of the above technical solution, after obtaining the signal fluctuation of the temperature sensor, the difference V of the parameter signal within a unit time T is calculated. n and the fluctuation value V of the parameter signal quantity jump Determine whether the parameter signal is in a stable state; when V jump If the value exceeds the fluctuation limit, the current data will not be used, and the next set of V will be sampled continuously. jump until V jump If the reading is less than the fluctuation limit, the device is considered to be in a stable state, and the measured temperature is output. This is used to determine whether the user has placed the device inside their ear and whether the temperature is stable before calculating the target temperature, based on the real-time signal fluctuations of the temperature sensor. This further effectively reduces the probability of temperature measurement errors caused by user measurement techniques or sensor signal jitter.

[0027] 5. In the first aspect of the above technical solution, the difference V of the parameter signal quantity within a unit time T is calculated according to the following fluctuation calculation formula. n and the fluctuation value V of the parameter signal quantity jump V n =(U n -U n-1 ) / T, where V n U is the difference in the parameter signal quantity within a unit time T; n-1 For the previous parameter semaphore, U n Given the current parameter semaphore; obtain V n Then, find the value of V. max Maximum value and V min Minimum value, and calculate the fluctuation value V of the parametric semaphore. jump =V max -V min V maxV is the maximum difference between the parameter semaphores. min This represents the minimum difference between the parameter signals. Using the formula in the further scheme described above, we can quickly and accurately determine whether the parameter signals are in a stable state, and the calculation method is simple and reliable. It requires no extra computing power and has low requirements for the chip.

[0028] 6. In the first aspect of the above technical solution, the temperature sensor is a thermopile temperature sensor, the parameter signal change rate is the voltage change rate at the hot end of the temperature sensor, and the parameter signal quantity is a voltage signal quantity. The thermopile temperature sensor has a simple manufacturing process, low cost, does not contact the object being measured during temperature measurement, and has a series of advantages such as short response time, no interference with the measured temperature field, long service life, and convenient operation.

[0029] 7. In the first aspect of the above technical solution, the temperature change rate of the target temperature obtained by the temperature sensor after heating is stopped and the corresponding time are acquired, and a period of time in which the temperature change rate is relatively flat is selected as the stabilization time. This is to obtain a more stable and accurate target temperature.

[0030] 8. In the first aspect of the above technical solution, in the step of adjusting the temperature control to achieve a stable set temperature and prompting that it can be measured, a screen display or voice prompt can be used. After seeing the text / pattern indicating that it can be measured or hearing the voice prompt indicating that it can be measured, the user can click the measurement button / touchpad or use voice control to perform the measurement.

[0031] Due to the application of the above-mentioned solution, the present invention has the following advantages and effects compared with the prior art:

[0032] 1. In the temperature measurement adaptive compensation method of the present invention, when performing thermometer temperature measurement, the thermometer is turned on and the temperature sensor is preheated. The temperature control is adjusted to reach a stable set temperature and a prompt is given that measurement is possible. After selecting measurement, heating is stopped, and the thermometer is brought close to the subject's temperature measurement area to begin measurement. The rate of change of the parameter signal of the temperature sensor during the cooling process is obtained, and the rate of change of the parameter signal is converted into a compensation temperature to compensate for the target temperature, avoiding the phenomenon of low temperature measurement. The convergence characteristics of the data are effectively improved compared with conventional ear thermometers using the same preheating technology. In particular, it can improve the problem of low temperature in the first measurement immediately after the ear thermometer is heated in low-temperature environments. The signal fluctuation of the temperature sensor is obtained. When the signal of the temperature sensor is in a stable state, the measured temperature is obtained, which effectively avoids the probability of temperature measurement errors caused by the user's measurement method or the sensor's own signal jitter, improves the reliability and accuracy of temperature measurement, and reduces the probability of misjudgment. Finally, the target temperature is calculated by the compensation temperature and the measured temperature, which greatly improves the accuracy of the final user target temperature.

[0033] 2. The temperature adaptive compensation system of this invention includes a temperature sensor encapsulated with a heating coil, a processor for executing the temperature adaptive compensation method, and a display for displaying the target temperature. This forms a complete system capable of reliably acquiring and displaying the user's correct body temperature, thus providing equipment support for high-quality, high-precision body temperature measurement. Similarly, an ear thermometer with a temperature adaptive compensation system provides users with a fast and accurate measurement device, enabling them to obtain accurate body temperature data and providing more reliable parameters for diagnosing changes in physical condition caused by temperature variations. A control program for executing the temperature adaptive compensation method is stored in a readable storage medium, allowing the processor of the temperature adaptive compensation system to effectively execute this control program.

[0034] 3. In summary, this invention, through innovative design of a temperature measurement adaptive compensation method, a temperature measurement adaptive compensation system, an ear thermometer with a temperature measurement adaptive compensation system, and a readable storage medium storing a control program for executing the temperature measurement adaptive compensation method, effectively improves the convergence characteristics and reliability of the measured target temperature data. Attached Figure Description

[0035] Figure 1 This is a schematic diagram illustrating the process of measuring human body temperature using an infrared thermopile sensor.

[0036] Figure 2 This is a schematic diagram of the temperature measurement adaptive compensation method in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram illustrating the general usage process of the ear thermometer in an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of the curve for continuously reading the output signal of the electric thermal pile;

[0039] Figure 5 A schematic diagram showing the output signal curves of a fluctuating and a normal electrothermal pile;

[0040] Figure 6 A schematic diagram of the curves showing the stable target temperature obtained as the stabilization time increases;

[0041] Figure 7 The data curves are obtained from three measurements of eight prototypes using the temperature adaptive compensation method of this invention.

[0042] Figure 8 This is a data curve graph of three measurements taken from eight prototypes using a conventional preheating temperature measurement scheme. Detailed Implementation

[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] This invention aims to solve the problems of measurement errors and jitter errors in existing preheating temperature measurement technologies due to different cooling rates of sensors. It innovatively designs a temperature measurement adaptive compensation method, a temperature measurement adaptive compensation system, an ear thermometer with a temperature measurement adaptive compensation system, and a readable storage medium storing a control program for executing the temperature measurement adaptive compensation method, thereby effectively improving the convergence characteristics and reliability of the measured target temperature data.

[0045] Example 1: This invention discloses a temperature measurement adaptive compensation method for adaptive compensation during thermometer temperature measurement. The method includes:

[0046] S100: After the thermometer is turned on, it preheats the temperature sensor, adjusts the temperature control to achieve a stable set temperature, and then prompts that it can be measured.

[0047] S200: Select measurement and stop heating. Place the thermometer close to the subject's temperature measurement area to begin measurement.

[0048] S300: Obtain the rate of change of the parameter signal of the temperature sensor during the cooling process, and convert the rate of change of the parameter signal into the compensation temperature.

[0049] S400: Acquire the signal fluctuation of the temperature sensor, and when the signal of the temperature sensor is in a stable state, acquire the measured temperature to compensate for the temperature difference and calculate the target temperature.

[0050] Through the implementation of Embodiment 1 of this invention, in the temperature adaptive compensation method, when performing thermometer temperature measurement, the thermometer is turned on and the temperature sensor is preheated. The temperature control is adjusted to reach a stable set temperature and a prompt is given that measurement is possible. After selecting measurement, heating is stopped, and the thermometer is brought close to the subject's temperature measurement area to begin measurement. The rate of change of the parameter signal of the temperature sensor during the cooling process is obtained, and the rate of change of the parameter signal is converted into a compensation temperature to compensate for the target temperature, avoiding the phenomenon of low temperature measurement. The convergence characteristics of the data are effectively improved compared with conventional ear thermometers using the same preheating technology. In particular, it can improve the problem of low temperature measurement in the first measurement immediately after the ear thermometer is heated in low-temperature environments. The signal fluctuation of the temperature sensor is obtained, and the measured temperature is obtained when the signal of the temperature sensor is in a stable state. This effectively avoids the probability of temperature measurement errors caused by the user's measurement method or the sensor's own signal jitter, improves the reliability and accuracy of temperature measurement, and reduces the probability of misjudgment. Finally, the target temperature is calculated by the compensation temperature and the measured temperature, which greatly improves the accuracy of the final user target temperature.

[0051] In one embodiment of the present invention, in step S300, the formula for calculating the rate of change K of the parameter signal is K = (T n -T n+1 ) / t; where T n T is the initial semaphore. n+1 The termination signal is represented by t, which is the settling time from when the thermometer stops heating until the measured temperature is acquired. After the thermometer stops heating, it enters a natural cooling state, at which point the start signal T is read. n The termination signal T is acquired after the stabilization time between when the thermometer stops heating and when the measured temperature is obtained. n+1 This step is used to obtain the rate of change of parameter signals with higher reference value as the basis for converting into compensation temperature, thus providing more accurate basic data for subsequent calculations.

[0052] In another embodiment of the present invention, in step S300, in the step of converting the rate of change of the parameter signal K into a compensated temperature value, a correction coefficient y is introduced to convert the rate of change of the parameter signal K into a compensated temperature value, y = (T obj1 -T obj0 ) / K, where T obj0 For the measured temperature, T obj1 The target temperature is set. This step is used to more accurately and quickly convert the rate of change of the parameter signal into the compensation temperature.

[0053] In another embodiment of the present invention, in step S400, after acquiring the signal fluctuation of the temperature sensor, the difference V of the parameter signal within a unit time T is calculated. nand the fluctuation value V of the parameter signal quantity jump Determine whether the parameter signal is in a stable state; when V jump If the value exceeds the fluctuation limit, the current data will not be used, and the next set of V will be sampled continuously. jump until V jump If the reading is less than the fluctuation limit, the device is considered to be in a stable state, and the measured temperature is output. This is used to determine whether the user has placed the device inside their ear and whether the temperature is stable before calculating the target temperature, based on the real-time signal fluctuations of the temperature sensor. This further effectively reduces the probability of temperature measurement errors caused by user measurement techniques or sensor signal jitter.

[0054] In one embodiment of the present invention, in step S400, the difference V of the parameter signal quantity within a unit time T is calculated according to the following fluctuation calculation formula. n and the fluctuation value V of the parameter signal quantity jump V n =(U n -U n-1 ) / T, where V n U is the difference in the parameter signal quantity within a unit time T; n-1 For the previous parameter semaphore, U n Given the current parameter semaphore; obtain V n Then, find the value of V. max Maximum value and V min Minimum value, and calculate the fluctuation value V of the parametric semaphore. jump =V max -V min V max V is the maximum difference between the parameter semaphores. min This represents the minimum difference between the parameter signals. Using the formula in the further scheme described above, we can quickly and accurately determine whether the parameter signals are in a stable state, and the calculation method is simple and reliable. It requires no extra computing power and has low requirements for the chip.

[0055] In another embodiment of the present invention, in step S100, the temperature sensor is a thermopile temperature sensor, the parameter signal change rate is the voltage change rate at the hot end of the temperature sensor, and the parameter signal quantity is a voltage signal quantity. The thermopile temperature sensor has a simple manufacturing process, low cost, and does not contact the object being measured during temperature measurement. It has a series of advantages such as short response time, no interference with the measured temperature field, long service life, and convenient operation.

[0056] In another embodiment of the present invention, in step S400, the temperature change rate of the target temperature obtained by the temperature sensor after heating is stopped and the corresponding time are acquired, and a period of time with a flat temperature change rate is selected as the stabilization time. This results in a more stable and accurate target temperature.

[0057] Example 2: Example 2 of the present invention proposes a temperature adaptive compensation system for temperature adaptive compensation in the method described in Example 1 of the present invention. The temperature adaptive compensation system includes a temperature sensor, a processor, and a display.

[0058] The temperature sensor contains a heating coil, which preheats the temperature sensor.

[0059] The processor is used to acquire the rate of change of the parameter signal of the temperature sensor during the cooling process, convert the rate of change of the parameter signal into a compensation temperature; acquire the signal fluctuation of the temperature sensor, acquire the measured temperature when the signal of the temperature sensor is in a stable state, and calculate the target temperature by using the compensation temperature and the measured temperature.

[0060] The display is used to show the target temperature.

[0061] Through the implementation of Embodiment 2 of the present invention, a temperature sensor encapsulated with a heating coil, a processor for executing the temperature adaptive compensation method, and a display for displaying the target temperature are designed in the temperature measurement adaptive compensation system, forming a complete system that can reliably acquire and display the user's correct body temperature, thereby providing equipment support for the high-quality, high-precision body temperature measurement requirements.

[0062] Example 3: This invention discloses an ear thermometer, which includes a housing and a temperature measurement adaptive compensation system as described in Example 2 of this invention, mounted on the housing.

[0063] Through the implementation of Embodiment 3 of the present invention, the ear thermometer with temperature adaptive compensation system also provides users with a fast and accurate measurement device, enabling users to obtain accurate body temperature data and providing more reliable parameters for the diagnosis of changes in physical condition caused by changes in body temperature.

[0064] In Embodiment 4, the present invention also discloses a readable storage medium storing a control program, which, when executed by a processor, causes the processor to perform the steps of the method described in Embodiment 1.

[0065] Through the implementation of Embodiment 4 of the present invention, a control program for executing the temperature adaptive compensation method is stored in a readable storage medium, and the control program can be effectively executed by the processor of the temperature adaptive compensation system.

[0066] Those skilled in the art will understand that the operation of the ear thermometer in the above embodiments can be implemented by a program instructing related hardware (blood pressure detection unit). This program is stored in a readable storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute the operations performed by the main control unit in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as read-only memory (ROM) and random access memory (RAM).

[0067] The following examples illustrate the practical application of the above embodiments of the present invention, such as... Figure 3 The diagram illustrates a general outline of the usage process of the ear thermometer of the present invention. In this ear thermometer, the temperature sensor is a thermopile temperature sensor, the parameter signal change rate is the voltage change rate of the hot end of the temperature sensor, and the parameter signal quantity is a voltage signal quantity.

[0068] The usage process of the temperature measurement adaptive compensation method in this embodiment of the invention can be referred to as follows:

[0069] First, turn on the ear thermometer. The heating starts immediately upon power-on, and PID temperature control is initiated for approximately 7 seconds. Once the sensor temperature stabilizes at the target temperature, a prompt will appear indicating that measurement is possible. At this point, insert the ear thermometer probe into the subject's ear canal and press the measurement button. Heating will then stop, and the sensor will enter a natural cooling state. The thermometer will then continuously read the voltage of the thermopile for approximately 1 second, followed by the cold junction temperature. The actual temperature of the measured object is calculated from the voltage output by the thermopile and the cold junction temperature. Finally, the target temperature value is obtained through the compensation algorithm described in this case.

[0070] When heating stops, continuously read the thermopile voltage data waveform as follows: Figure 4 As shown.

[0071] By capturing the signal change rate of the preheated ear thermometer sensor thermopile during the measurement process, it can be used as a reference. Figure 4 The curve shown represents the change in output signal quantity. Introducing parameter K as the rate of change of the thermopile output signal, the calculation formula is as follows:

[0072] K: Voltage change rate at the hot end of the sensor;

[0073] T n :Initial voltage signal quantity;

[0074] T n+1 :Termination voltage signal quantity;

[0075] t: time;

[0076] K = (T n -T n+1 ) / t.

[0077] The K calculated here is the rate of change of voltage, not the temperature value. Therefore, it is necessary to convert the rate of change K into a body temperature value. A correction factor y is introduced to convert K into a compensated temperature value. The calculation formula is as follows:

[0078] T obj0 The actual temperature is obtained by looking up the thermopile output voltage and cold junction temperature of the thermopile sensor in a table.

[0079] T obj1 Target temperature;

[0080] y: Correction coefficient (obtained through testing);

[0081] y = (T) obj1 -T obj0 ) / K.

[0082] After obtaining the above parameters, the target temperature after algorithm compensation can be calculated using the following formula:

[0083] T obj1 =T obj0 +K*y;

[0084] T obj1 The temperature of the object as actually seen by the user, after being compensated by the algorithm.

[0085] During the measurement process, the fluctuation of the thermopile voltage signal captured in real time is used to determine whether the user has placed it in their ear and whether it is in a stable state before calculating the target temperature. The fluctuation and normal signal are as follows: Figure 6 As shown.

[0086] The formula for calculating volatility is as follows:

[0087] T: Time

[0088] U n-1 Previous voltage signal quantity

[0089] U n Current voltage signal quantity

[0090] V n The difference in voltage signal quantity within a unit time T

[0091] Vmax The maximum difference in voltage signal quantity

[0092] V min Minimum difference of voltage signal quantity

[0093] V jump : fluctuation value of voltage signal quantity

[0094] V n =(U n-Un-1 ) / T

[0095] Get V n Then, find the value of V. max Maximum value and V min Minimum value

[0096] V jump =V max -V min

[0097] Finally, determine V jump If the value is too large, the protection procedure is triggered, and the current data is not used; the next set of V is continuously sampled. jump Once the temperature stabilizes, the calculated target temperature is output.

[0098] In the solution of the present invention, such as Figure 6 As shown, by continuously monitoring the target temperature after heating stops, it was found that the shorter the monitoring time, the greater the change in target temperature, and vice versa. Therefore, extending the measurement time after heating stops can effectively improve the stability of the measured target temperature. The disadvantage is also relatively obvious: the measurement time is longer, making rapid measurement impossible.

[0099] The following is a comparative analysis of temperature measurements using eight ear thermometer prototypes employing the adaptive compensation method of this invention and eight ear thermometer prototypes using a conventional preheating temperature measurement scheme. The test environment involved placing the ear thermometers under test at an ambient temperature of 15°C for 30 minutes, then powering them on normally and measuring the same 35°C blackbody water bath. Each thermometer was measured three times consecutively, and the data were obtained.

[0100] The data curves from three consecutive measurements performed on eight ear thermometer prototypes using the temperature adaptive compensation method of this invention can be used as a reference. Figure 7 As shown.

[0101] The data curves from three consecutive measurements taken using eight ear thermometer prototypes with a conventional preheating temperature measurement scheme can be used as a reference. Figure 8 As shown.

[0102] The second and third measurements from a standard preheating ear thermometer are quite close and considered stable. The first measurement, however, is significantly lower than the second or third, indicating that the first measurement is not stable. Preheating ear thermometers lack this compensation algorithm, and the measurement time is approximately 1.5 seconds, which can lead to lower readings in low-temperature environments (10℃-23℃).

[0103] The present invention employs an adaptive compensation algorithm, and incorporates a data anti-jitter algorithm into the adaptive algorithm's judgment process to prevent abnormal measurement results caused by unstable placement of the ear canal during measurement. Adding this algorithm effectively reduces the probability of measurement errors by the user, improving data reliability. Figure 7 As shown, the problem of the initial measurement being too low can be effectively improved, and the data convergence characteristics are effectively improved compared to the Braun ear thermometer using the same preheating technology.

[0104] Therefore, through the implementation of the above embodiments, the objective of the present invention has been achieved, effectively improving the convergence characteristics and reliability of the measured target temperature data.

[0105] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A temperature measurement adaptive compensation method, used for adaptive compensation during thermometer temperature measurement, characterized in that, The method includes: After the thermometer is turned on, it preheats the temperature sensor, adjusts the temperature control to reach a stable set temperature, and then indicates that it is ready to measure. After selecting the measurement option, stop heating and bring the thermometer close to the subject's temperature measurement area to begin the measurement. Obtain the rate of change of the parameter signal of the temperature sensor during the cooling process, and convert the rate of change of the parameter signal into a compensation temperature; The signal fluctuation of the temperature sensor is obtained. When the signal of the temperature sensor is in a stable state, the measured temperature is obtained, and the target temperature is calculated by compensating for the temperature difference between the measured temperature and the actual temperature. The formula for calculating the rate of change K of the parameter signal is K = (T n -T n+1 ) / t; where T n T is the initial semaphore. n+1 The signal is a termination signal, where t is the settling time from when the thermometer stops heating until the measured temperature is obtained. In the step of converting the rate of change of the parameter signal K into a compensated temperature value, a correction coefficient y is introduced to convert the rate of change of the parameter signal K into a compensated temperature value, y = (T obj1 -T obj0 ) / K, where T obj0 For the measured temperature, T obj1 The target temperature.

2. The temperature measurement adaptive compensation method according to claim 1, characterized in that: After acquiring the signal fluctuation of the temperature sensor, the difference V of the parameter signal within a unit time T is calculated. n and the fluctuation value V of the parameter signal quantity jump Determine whether the parameter signal is in a stable state; when V jump If the value exceeds the fluctuation limit, the current data will not be used, and the next set of V will be sampled continuously. jump until V jump If the reading is less than the fluctuation limit, the system is considered to be in a stable state, and the measured temperature is output.

3. The temperature measurement adaptive compensation method according to claim 2, characterized in that, The difference V of parameter signal quantity within a unit time T is calculated using the following fluctuation calculation formula. n and the fluctuation value V of the parameter signal quantity jump V n =(U n -U n-1 ) / T, where V n U is the difference in the parameter signal quantity within a unit time T; n-1 For the previous parameter semaphore, U n Given the current parameter semaphore; obtain V n Then, find the value of V. max Maximum value and V min Minimum value, and calculate the fluctuation value V of the parametric semaphore. jump =V max -V min V max V is the maximum difference between the parameter semaphores. min It is the minimum difference between the parameter semaphores.

4. The temperature measurement adaptive compensation method according to any one of claims 1 to 3, characterized in that: The temperature sensor is a thermopile temperature sensor, the parameter signal change rate is the voltage change rate at the hot end of the temperature sensor, and the parameter signal quantity is a voltage signal quantity.

5. The temperature measurement adaptive compensation method according to claim 1, characterized in that, The method further includes: The temperature change rate of the target temperature obtained by the temperature sensor after heating is stopped and the corresponding time are obtained. The time period with a flat temperature change rate is selected as the stabilization time.

6. A temperature adaptive compensation system, used for temperature adaptive compensation in the method according to any one of claims 1 to 5, characterized in that, The temperature measurement adaptive compensation system includes a temperature sensor, a processor, and a display; The temperature sensor contains a heating coil, which preheats the temperature sensor. The processor is used to acquire the rate of change of the parameter signal of the temperature sensor during the cooling process, convert the rate of change of the parameter signal into a compensation temperature; acquire the signal fluctuation of the temperature sensor, acquire the measured temperature when the signal of the temperature sensor is in a stable state, and calculate the target temperature by using the compensation temperature and the measured temperature. The display is used to show the target temperature.

7. An ear thermometer, characterized in that: The ear thermometer includes a housing and a temperature adaptive compensation system as described in claim 6, mounted on the housing.

8. A readable storage medium, characterized in that: The readable storage medium stores a control program that, when executed by a processor, causes the processor to perform the steps of the method as described in any one of claims 1 to 5.

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