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

Abstract

The invention discloses a temperature measurement adaptive compensation method and system, an ear thermometer and a readable storage medium. The method comprises the steps that after a thermometer is started, a temperature measurement sensor is preheated, the temperature is adjusted and controlled to reach a stable set temperature, and it is prompted that measurement can be carried out; heating is stopped after measurement is selected, and the thermometer is close to the temperature measurement part of the measured person to start measurement; acquiring a parameter signal change rate of the temperature measurement sensor in a cooling process, and converting the parameter signal change rate into a compensation temperature; the semaphore volatility of the temperature measurement sensor is obtained, the actually measured temperature is obtained when the semaphore of the temperature measurement sensor is in a stable state, and the target temperature is calculated according to the compensation temperature and the actually measured temperature; the temperature measurement adaptive compensation system comprises a temperature measurement sensor, a processor and a display. According to the scheme, the convergence characteristic of the measured target temperature data and the reliability of the target temperature data can be effectively improved.

Description

Technical Field

[0001] The present 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 Art

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

[0003] Medical infrared ear thermometer ear thermometer uses the principle that any object above absolute zero (-273℃) will emit infrared rays, and receives infrared rays through the sensor to obtain temperature data. Infrared temperature measurement is also called radiation temperature measurement, and generally uses thermoelectric or photoelectric detectors as detection elements. The infrared temperature measurement system is relatively simple, and can achieve large-area temperature measurement, or it can measure the temperature of a certain point on the object being measured; it can be portable or fixed, and easy to use; its manufacturing process is simple, the cost is low, and it 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 easy operation. The composition of the infrared thermopile sensor includes two modules, one is the thermopile, and the other is the thermistor. The main function of the thermopile is to convert infrared rays into parameter signals, and the main function of the thermistor is to detect the current temperature of the sensor.

[0004] Figure 1 The process of measuring human body temperature using an infrared thermopile sensor is shown. The infrared thermopile sensor is composed of many thermocouples connected in series to form a thermopile, forming a hot end and a cold end. The cold end temperature is the temperature measured by the thermistor. The hot end is one end of the object to be measured. When a heat difference is formed with the cold end, the thermopile will generate a corresponding induced thermoelectric potential. With the cold end temperature and the thermoelectric potential, the temperature of the object to be measured can be calculated.

[0005] When using the above temperature measurement technology 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, causing the thermoelectric potential to fluctuate accordingly. During this fluctuation process, the object temperature obtained by measurement and calculation will result in a large deviation.

[0006] To address the above issues, a preheating sensor is introduced. A heating coil is encapsulated inside the sensor to control the temperature of the sensor. After the sensor temperature is controlled to be close to that of the human body, it is inserted into the ear for measurement. The sensor will not be impacted by the ear temperature. This solves the uncertainty caused by the influence of ear temperature on ordinary thermopile sensors.

[0007] However, since the preheating sensor needs to be combined with PID control technology to control the heating of the sensor, the thermal pile signal will be interfered by the control signal, resulting in measurement errors. Therefore, the 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 the natural cooling state, due to the difference in ambient temperature, the cooling speed of the sensor is different, and measurement errors will occur at the sensor signal end.

[0008] In addition, when using some handheld infrared thermometers, such as forehead thermometers and ear thermometers, if the user does not place it steadily or the hand shakes during the measurement process, it will also cause abnormal measurement results. In particular, when the ear thermometer is inserted into the ear canal of the person being measured, temperature measurement errors may occur due to measurement techniques or sensor signal jitter.

[0009] In view of this, how to solve the problems of measurement error and jitter error at the sensor signal end caused by different cooling speeds of the sensor in the existing preheating temperature measurement technology has become a topic to be studied and solved by the present invention. Summary of the invention

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

[0011] To achieve the above object, the first aspect of the present invention proposes a temperature measurement adaptive compensation method for adaptive compensation when a thermometer measures temperature. The innovative point of the method is 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 prompts that it can be measured;

[0013] After selecting the measurement, stop heating and bring the thermometer close to the temperature measurement area of ​​the person to start measuring;

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

[0015] 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, and the target temperature is calculated by combining the compensation temperature and the measured temperature.

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

[0017] A heating coil is encapsulated in the temperature sensor, and the temperature sensor is preheated by the heating coil;

[0018] The processor is used to obtain the parameter signal change rate of the temperature sensor during the cooling process, and convert the parameter signal change rate into a compensation temperature; obtain the signal quantity volatility of the temperature sensor, and obtain the measured temperature when the signal quantity 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 display the target temperature.

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

[0021] A fourth aspect of the present invention provides a readable storage medium having a control program stored thereon. When the control program is executed by a processor, the processor executes the steps of the method described in the first aspect of the present invention.

[0022] The relevant contents of the present invention are explained as follows:

[0023] 1. Through the implementation of the above technical solutions of the present invention, in order to solve the problems of the existing preheating temperature measurement technology, such as the different cooling speeds of the sensor, which causes measurement errors and jitter errors 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, thereby effectively improving the convergence characteristics of the measured target temperature data and the reliability of the target temperature data. In the temperature measurement adaptive compensation method, when the thermometer is used for temperature measurement, the temperature sensor is preheated after the thermometer is turned on, and the temperature control is adjusted to reach a stable set temperature and prompt that measurement can be made; after selecting measurement, the heating is stopped, and the thermometer is placed close to the temperature measurement part of the person being measured to start measurement; the parameter signal change rate of the temperature sensor during the cooling process is obtained, and the parameter signal change rate is converted into a compensation temperature to compensate for the target temperature to avoid 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, especially the problem of low temperature in the first measurement after the ear thermometer is heated in a low temperature environment; the signal volatility of the temperature sensor is obtained, and the actual measured temperature is obtained when the signal of the temperature sensor is in a stable state, which effectively avoids the probability of temperature measurement errors caused by the user's measurement technique 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 using the compensation temperature and the actual measured temperature, so that the accuracy of the user's target temperature finally obtained is greatly improved. In the temperature measurement adaptive compensation system, a temperature measurement sensor encapsulated with a heating coil, a processor for executing the temperature measurement adaptive compensation method, and a display for displaying the target temperature are designed to form a complete system that can reliably obtain and display the user's correct body temperature, thereby providing equipment guarantee for high-quality and high-precision body temperature measurement needs. The ear thermometer with a temperature measurement adaptive compensation system also provides users with a fast and accurate measurement device, allowing users to obtain accurate body temperature data, and provide more reliable parameters for changes in physical condition and diagnosis caused by changes in body temperature. In the readable storage medium, a control program for executing the temperature measurement adaptive compensation method is stored, and the control program can be effectively executed by the processor of the temperature measurement adaptive compensation system.

[0024] 2. In the first aspect of the above technical solution, the calculation formula of the parameter signal change rate K is K=(T n -T n+1 ) / t; where T n is the starting signal, T n+1 is the termination signal, and t is the stabilization time from when the thermometer stops heating to when the measured temperature is obtained. After the thermometer stops heating, it will enter the natural cooling state, at which time the start signal T is read. n, and obtain the termination signal T after the stabilization time from when the thermometer stops heating to when the measured temperature is obtained n+1 This step is used to obtain a parameter signal change rate with higher reference value as the basis for converting it into compensation temperature, 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 parameter signal change rate K into the compensated temperature value, a correction coefficient y is introduced to convert the parameter signal change rate K into the compensated temperature value, y=(T obj1 -T obj0 ) / K, where T obj0 is the measured temperature, T obj1 This step is used to convert the parameter signal change rate into the compensation temperature more accurately and quickly.

[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 the unit time T is calculated. n and the jump value V of the parameter signal jump , to determine whether the parameter signal is in a stable state; when V jump If the value is greater than the jump limit, the current data will not be used and the next set of V will be continuously sampled. jump , until V jump If the temperature is less than the limit of the jump, it is judged to be in a stable state and the measured temperature output is obtained. In this way, the user can judge whether the earphone is placed in the ear according to the fluctuation of the temperature sensor signal captured in real time, and calculate the target temperature after it is in a stable state, so as to further effectively avoid the probability of temperature measurement errors caused by the user's measurement technique or the sensor's own signal jitter.

[0027] 5. In the first aspect of the above technical solution, the difference V of the parameter signal quantity within the unit time T is calculated according to the following fluctuation calculation formula: n and the jump value V of the parameter signal jump :V n =(U n -U n-1 ) / T, where V n is the difference of parameter signal quantity within unit time T; U n-1 is the last parameter semaphore, U n is the current parameter signal; get V n Then, find V max Maximum value and V min Minimum value, and calculate the jump value V of the parameter signal jump =V max -V min , V maxis the maximum difference of the parameter signal, V min is the minimum difference of the parameter signal. By using the formula in the above further scheme, it is possible to quickly and accurately determine whether the parameter signal is in a stable state, and the calculation method is simple and reliable. No extra computing power is required, and the chip requirements are low.

[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 of the hot end of the temperature sensor, and the parameter signal quantity is the 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 easy 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 stopping heating and the corresponding time are obtained, and the time period with a gentle temperature change rate is selected as the stabilization time, so as to obtain a more stable and more accurate target temperature.

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

[0031] Due to the application of the above scheme, 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 the thermometer is used for temperature measurement, the temperature sensor is preheated after the thermometer is turned on, and the temperature control is adjusted to reach a stable set temperature and a prompt is given that measurement can be made; after selecting the measurement, the heating is stopped, and the thermometer is placed close to the temperature measurement part of the subject to start measurement; the parameter signal change rate of the temperature sensor during the cooling process is obtained, and the parameter signal change rate is converted into a compensation temperature to compensate for the target temperature, so as to avoid 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, especially the problem of low temperature measured in the first measurement after the ear thermometer is heated in a low temperature environment can be improved; the signal volatility of the temperature sensor is obtained, and the measured temperature is obtained when the signal of the temperature sensor is in a stable state, so as to effectively avoid the probability of temperature measurement errors caused by the user's measurement technique or the sensor's own signal jitter, improve the reliability and accuracy of temperature measurement, reduce the probability of misjudgment, and finally calculate the target temperature with the compensation temperature and the measured temperature, so that the accuracy of the user's target temperature finally obtained is greatly improved.

[0033] 2. In the temperature measurement adaptive compensation system of the present invention, a temperature measurement sensor encapsulated with a heating coil, a processor for executing the temperature measurement adaptive compensation method, and a display for displaying the target temperature are designed to form a complete system that can reliably obtain and display the user's correct body temperature, thereby providing equipment guarantee for high-quality and high-precision body temperature measurement needs. The ear thermometer with a temperature measurement adaptive compensation system also provides users with a fast and accurate measurement device, allowing users to obtain accurate body temperature data, and provide more reliable parameters for changes in physical condition and diagnosis caused by changes in body temperature. In the readable storage medium, a control program for executing the temperature measurement adaptive compensation method is stored, and the control program can be effectively executed by the processor of the temperature measurement adaptive compensation system.

[0034] 3. In summary, the present invention 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 of the measured target temperature data and the reliability of the target temperature data. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0037] Figure 3 A schematic diagram showing the general process of using the ear thermometer in an embodiment of the present invention;

[0038] Figure 4 It is a curve diagram of continuously reading the output signal of the electric thermal pile;

[0039] Figure 5 It is a curve diagram of the fluctuating and normal output signals of the electric thermal pile;

[0040] Figure 6 It is a curve diagram of the stable target temperature obtained as the stabilization time increases;

[0041] Figure 7 The data curve diagram is a three-time measurement data of 8 prototypes using the temperature measurement adaptive compensation method of the present invention;

[0042] Figure 8 This is a data curve diagram of three measurements of 8 prototypes using the conventional preheating temperature measurement solution. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0044] The present invention aims to solve the problems of existing preheating temperature measurement technology, such as measurement errors and jitter errors generated at the sensor signal end due to different cooling speeds of the sensor, and 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 of the measured target temperature data and the reliability of the target temperature data.

[0045] Embodiment 1, Embodiment 1 of the present invention discloses a temperature measurement adaptive compensation method, which is used for adaptive compensation when a thermometer measures temperature. The method comprises:

[0046] S100, after the thermometer is turned on, it preheats the temperature sensor, adjusts the temperature control to reach a stable set temperature and prompts that it can be measured;

[0047] S200, stop heating after selecting measurement, and bring the thermometer close to the temperature measurement part of the subject to start measurement;

[0048] S300, obtaining a parameter signal change rate of the temperature sensor during the cooling process, and converting the parameter signal change rate into a compensation temperature;

[0049] S400, obtaining the signal fluctuation of the temperature measuring sensor, obtaining the measured temperature when the signal of the temperature measuring sensor is in a stable state, and calculating the target temperature by using the compensation temperature and the measured temperature.

[0050] Through the implementation of the first embodiment of the present invention, in the temperature measurement adaptive compensation method, when the thermometer is used for temperature measurement, the temperature sensor is preheated after the thermometer is turned on, and the temperature control is adjusted to reach a stable set temperature and a prompt is given that measurement can be made; after selecting the measurement, the heating is stopped, and the thermometer is placed close to the temperature measurement part of the person being measured to start measurement; the parameter signal change rate of the temperature sensor during the cooling process is obtained, and the parameter signal change rate is converted into a compensation temperature to compensate for the target temperature to avoid 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, especially the problem of low temperature measured in the first measurement after the ear thermometer is heated in a low temperature environment can be improved; the signal volatility of the temperature sensor is obtained, and the measured temperature is obtained when the signal of the temperature sensor is in a stable state, effectively avoiding the probability of temperature measurement errors caused by the user's measurement technique or the sensor's own signal jitter, improving the reliability and accuracy of temperature measurement, and reducing the probability of misjudgment. Finally, the target temperature is calculated using the compensation temperature and the measured temperature, so that the accuracy of the user's target temperature finally obtained is greatly improved.

[0051] In one method of the first embodiment of the present invention, in step S300, the calculation formula of the parameter signal change rate K is K=(T n -T n+1 ) / t; where T n is the starting signal, T n+1 is the termination signal, and t is the stabilization time from when the thermometer stops heating to when the measured temperature is obtained. After the thermometer stops heating, it will enter the natural cooling state, at which time the start signal T is read. n , and obtain the termination signal T after the stabilization time from when the thermometer stops heating to when the measured temperature is obtained n+1 This step is used to obtain a parameter signal change rate with higher reference value as the basis for converting it into compensation temperature, 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 parameter signal change rate K into the compensated temperature value, a correction coefficient y is introduced to convert the parameter signal change rate K into the compensated temperature value, y=(T obj1 -T obj0 ) / K, where T obj0 is the measured temperature, T obj1 This step is used to convert the parameter signal change rate into the compensation temperature more accurately and quickly.

[0053] In another embodiment of the present invention, in step S400, after obtaining the signal fluctuation of the temperature sensor, the difference V of the parameter signal within the unit time T is calculated. nand the jump value V of the parameter signal jump , to determine whether the parameter signal is in a stable state; when V jump If the value is greater than the jump limit, the current data will not be used and the next set of V will be continuously sampled. jump , until V jump If the temperature is less than the limit of the jump, it is judged to be in a stable state and the measured temperature output is obtained. In this way, the user can judge whether the earphone is placed in the ear according to the fluctuation of the temperature sensor signal captured in real time, and calculate the target temperature after it is in a stable state, so as to further effectively avoid the probability of temperature measurement errors caused by the user's measurement technique or the sensor's own signal jitter.

[0054] In one of the methods of the first embodiment of the present invention, in step S400, the difference V of the parameter signal quantity within the unit time T is calculated according to the following fluctuation calculation formula: n and the jump value V of the parameter signal jump :V n =(U n -U n-1 ) / T, where V n is the difference of parameter signal quantity within unit time T; U n-1 is the last parameter semaphore, U n is the current parameter signal; get V n Then, find V max Maximum value and V min Minimum value, and calculate the jump value V of the parameter signal jump =V max -V min , V max is the maximum difference of the parameter signal, V min is the minimum difference of the parameter signal. By using the formula in the above further scheme, it is possible to quickly and accurately determine whether the parameter signal is in a stable state, and the calculation method is simple and reliable. No extra computing power is required, and the chip requirements are low.

[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 of the hot end of the temperature sensor, and the parameter signal quantity is the 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 easy 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 stopping heating and the corresponding time are obtained, and a time period with a gentle temperature change rate is selected as the stabilization time, so as to obtain a more stable and more accurate target temperature.

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

[0058] A heating coil is encapsulated in the temperature sensor, and the temperature sensor is preheated by the heating coil;

[0059] The processor is used to obtain the parameter signal change rate of the temperature sensor during the cooling process, and convert the parameter signal change rate into a compensation temperature; obtain the signal quantity volatility of the temperature sensor, and obtain the measured temperature when the signal quantity 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 display the target temperature.

[0061] Through the implementation of the second embodiment of the present invention, in the temperature measurement adaptive compensation system, a temperature measurement sensor encapsulated with a heating coil, a processor for executing the temperature measurement adaptive compensation method, and a display for displaying the target temperature are designed to form a complete system that can reliably obtain and display the user's correct body temperature, thereby providing equipment guarantee for high-quality and high-precision body temperature measurement needs.

[0062] Embodiment 3. Embodiment 3 of the present invention discloses an ear thermometer, which includes a shell and a temperature measurement adaptive compensation system as described in Embodiment 2 of the present invention, which is installed on the shell.

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

[0064] Embodiment 4: Embodiment 4 of the present invention further discloses a readable storage medium, on which a control program is stored. When the control program is executed by a processor, the processor executes the steps of the method described in Embodiment 1.

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

[0066] Those skilled in the art can understand that the operation of the ear thermometer in the above-mentioned embodiment method can be completed by instructing the relevant hardware (blood pressure detection unit) through a program, and the program is stored in a readable storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to perform the operations performed by the main control unit in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as read-only memory (ROM), random access memory (RAM), etc.

[0067] The following is an example of the actual application process of the above embodiment of the present invention. Figure 3 As shown, an overview of the use process of the ear thermometer of the present invention is shown. In the ear thermometer, the temperature sensor adopts 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 the voltage signal quantity.

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

[0069] First, turn on the ear thermometer. As soon as it is turned on, the heating is turned on immediately and the PID temperature control is performed. The time is about 7 seconds. After the sensor temperature stabilizes to the target temperature, it prompts that measurement is possible. At this time, insert the ear thermometer probe into the ear canal of the person being measured, and then press the measurement button. The heating will be turned off and stopped. At this time, the sensor enters the natural cooling state and starts to continuously read the voltage of the thermopile for about 1 second, and then reads the cold end temperature. The actual temperature of the object being measured is calculated from the voltage output by the thermopile and the cold end temperature, and then the final target temperature value is obtained through the compensation algorithm of this case.

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

[0071] During the measurement process, the signal change rate of the preheated ear thermometer sensor thermopile during the measurement process can be referenced. Figure 4 The curve shown in the figure changes. The parameter K is introduced as the rate of change of the thermopile output signal, and the calculation formula is as follows:

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

[0073] T n : Starting voltage signal;

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

[0075] t: time;

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

[0077] The K calculated at this time is the rate of change of voltage, not the temperature value, so the rate of change K needs to be converted into body temperature value, and a correction coefficient y is introduced to convert K into compensated temperature value. The calculation formula is as follows:

[0078] T obj0 : Measure the temperature, and get the object temperature by looking up the thermopile output voltage and cold end temperature of the thermopile sensor;

[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 obtained by the following formula:

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

[0084] T obj1 This is the temperature of the object that the user actually sees 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 put it in the ear. After it is in a stable state, the target temperature is calculated. The fluctuation and normal signals are as follows Figure 6 shown.

[0086] The volatility calculation formula is as follows:

[0087] T: Time

[0088] U n-1 : Last voltage signal

[0089] U n : Current voltage signal

[0090] V n : The difference in voltage signal quantity per unit time T

[0091] Vmax : Maximum difference in voltage signal

[0092] V min :Minimum difference of voltage signal

[0093] V jump : The jump value of the voltage signal

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

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

[0096] V jump =V max -V min

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

[0098] In the scheme of the present invention, Figure 6 As shown in the figure, the target temperature calculated by continuous detection after heating stops is found that the shorter the time, the greater the variability of the target temperature, and vice versa, the longer the time, the relatively gentle change of the target temperature. Therefore, extending the measurement time after stopping heating can effectively improve the stability of the measured target temperature. The disadvantage is also relatively obvious, that is, the measurement time is long and it is impossible to measure quickly.

[0099] The following randomly sampled 8 ear thermometer prototypes using the temperature measurement adaptive compensation method of the present invention and 8 ear thermometer prototypes using the conventional preheating temperature measurement scheme for temperature measurement comparison. The test environment is to place the ear thermometer to be tested at an ambient temperature of 15°C for 30 minutes, then start the machine normally to measure the same 35°C black body water tank, and each gun is measured three times in a row to obtain the measured data.

[0100] The data curve of three consecutive measurements of 8 ear thermometer prototypes using the temperature measurement adaptive compensation method of the present invention can be referred to Figure 7 shown.

[0101] The data curve of three consecutive measurements of 8 ear thermometer prototypes using the conventional preheating temperature measurement solution can be referenced Figure 8 shown.

[0102] The second and third measurement data of the conventional preheating temperature gun are relatively close, and are considered to be real and stable data. The first measurement will be significantly lower than the second or third measurement, so the first measurement is considered to be not real and stable data. The preheating ear thermometer does not have this compensation algorithm, and the measurement time is about 1.5s, resulting in a low temperature measurement in a low temperature environment (10℃-23℃).

[0103] The solution of the present invention adopts an adaptive compensation algorithm, and adds a data anti-shake algorithm to the adaptive algorithm judgment process to prevent the user from not placing the ear canal stably during the measurement process, resulting in abnormal measurement results. After adding this algorithm function, the error probability of user measurement can be effectively avoided and the reliability of data can be improved. Figure 7 As shown in the figure, the low problem of the first measurement can effectively improve this phenomenon, and the convergence characteristics of the data are effectively improved compared with the Braun ear thermometer using the same preheating technology.

[0104] Therefore, through the implementation of the above embodiments, the purpose of the present invention is achieved, so that the convergence characteristics of the measured target temperature data and the reliability of the target temperature data are effectively improved.

[0105] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature measurement adaptive compensation method, used for adaptive compensation when measuring temperature with a thermometer, characterized in that: The method comprises: After the thermometer is turned on, it preheats the temperature sensor, adjusts the temperature control to reach a stable set temperature, and prompts that it can be measured; After selecting the measurement, stop heating and bring the thermometer close to the temperature measurement area of ​​the person to start measuring; Obtain the parameter signal change rate of the temperature sensor during the cooling process, and convert the parameter signal change rate into the compensation temperature; 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, and the target temperature is calculated by combining the compensation temperature and the measured temperature.

2. The temperature measurement adaptive compensation method according to claim 1, characterized in that: The calculation formula of the parameter signal change rate K is K=(T n -T n+1 ) / t; where T n is the starting signal, T n+1 is the termination signal, and t is the stabilization time from when the thermometer stops heating to when the actual measured temperature is obtained.

3. The temperature measurement adaptive compensation method according to claim 2, characterized in that: In the step of converting the parameter signal change rate K into the compensated temperature value, a correction coefficient y is introduced to convert the parameter signal change rate K into the compensated temperature value, y=(T obj1 -T obj0 ) / K, where T obj0 is the measured temperature, T obj1 is the target temperature.

4. The temperature measurement adaptive compensation method according to claim 1, characterized in that: After obtaining the signal fluctuation of the temperature sensor, the difference V of the parameter signal within unit time T is calculated. n and the jump value V of the parameter signal jump , to determine whether the parameter signal is in a stable state; when V jump If the value is greater than the jump limit, the current data will not be used and the next set of V will be continuously sampled. jump , until V jump If it is less than the jump limit value, it is judged to be in a stable state and the actual temperature output is obtained.

5. The temperature measurement adaptive compensation method according to claim 4, characterized in that: The difference V of the parameter signal quantity per unit time T is calculated according to the following fluctuation calculation formula n and the jump value V of the parameter signal jump :V n =(U n -U n-1 ) / T, where V n is the difference of parameter signal quantity within unit time T; U n-1 is the last parameter semaphore, U n is the current parameter signal; get V n Then, find V max Maximum value and V min Minimum value, and calculate the jump value V of the parameter signal jump =V max -V min , V max is the maximum difference of the parameter signal, V min is the minimum difference in parameter semaphores.

6. The temperature measurement adaptive compensation method according to any one of claims 1 to 5, characterized in that: 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 the voltage signal quantity.

7. The temperature measurement adaptive compensation method according to claim 2, characterized in that: The method further comprises: The temperature change rate of the target temperature obtained by the temperature measuring sensor after stopping heating and the corresponding time are obtained, and the time period when the temperature change rate is gentle is selected as the stabilization time.

8. A temperature measurement adaptive compensation system, used for the temperature measurement adaptive compensation in the method according to any one of claims 1 to 7, characterized in that: The temperature measurement adaptive compensation system includes a temperature measurement sensor, a processor, and a display; A heating coil is encapsulated in the temperature sensor, and the temperature sensor is preheated by the heating coil; The processor is used to obtain the parameter signal change rate of the temperature sensor during the cooling process, and convert the parameter signal change rate into a compensation temperature; obtain the signal quantity volatility of the temperature sensor, and obtain the measured temperature when the signal quantity 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 display the target temperature.

9. An ear thermometer, characterized in that: The ear thermometer comprises a housing and a temperature measurement adaptive compensation system as claimed in claim 8 mounted on the housing.

10. A readable storage medium, characterized in that: The readable storage medium stores a control program, and when the control program is executed by a processor, the processor executes the steps of the method according to any one of claims 1 to 7.

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