An electronic thermometer with multi-sensor collaborative temperature measurement

Abstract

This invention discloses an electronic thermometer for multi-sensor coordinated temperature measurement, including a flexible circuit board, an ambient temperature sensor disposed near the environment, and a first main temperature sensor and a second main temperature sensor disposed near the body. The first and second main temperature sensors have different heat transfer rates and different heating / cooling rates with the temperature probe, resulting in accurate body temperature detection data and high detection efficiency. When the temperature field changes, the ambient temperature sensor compensates for and corrects the data from the main temperature sensors. The temperature measurement method of this invention combines the interval heating / cooling rates and real-time temperature difference of the two main temperature sensors, as well as the real-time fluctuation value monitored by the ambient temperature sensor, and incorporates a specific algorithm to quickly calculate the true body temperature value T.

Description

Technical Field

[0001] This invention relates to the field of body temperature detection technology, and mainly to an electronic thermometer that uses multiple sensors for coordinated temperature measurement. Background Technology

[0002] Body temperature is a key parameter reflecting the body's thermophysiological state. Electronic thermometers are widely used in home health monitoring, clinical diagnosis, and public health screening due to their advantages such as rapid measurement, avoidance of mercury leakage risks, and easy data reading and storage. Currently, most mainstream electronic thermometers use a single temperature sensor design, with the sensor and probe connected primarily using thermally conductive adhesive or direct physical contact. Single-sensor temperature measurements are limited, lacking reference data for comparison, resulting in a lack of basis for accuracy assessment and the inability to incorporate better algorithms for timely correction.

[0003] In addition, previous technologies used either thermally conductive adhesive or direct physical contact to connect temperature sensors and probes. The disadvantages of thermally conductive adhesive technology include: ① low thermal conductivity, typically 0.5-5 W / (mK), resulting in high thermal resistance; ② uneven application or filling thickness, leading to poor thermal resistance consistency; ③ high and uncontrollable contact thermal resistance between the thermally conductive adhesive and the stainless steel probe; ④ easy formation of air bubbles within the thermally conductive adhesive, making the process uncontrollable; ⑤ changes in the properties of the thermally conductive adhesive over time, leading to further performance degradation.

[0004] Direct physical contact results in gaps and air pockets at the contact surface, leading to high thermal resistance and poor controllability. The consistency and stability of these two assembly processes cannot be controlled, resulting in low product yield, poor thermal conductivity, and slow temperature measurement efficiency.

[0005] Furthermore, when the usage scenario changes, the temperature field is disrupted and the data cannot be corrected, leading to deviations in temperature measurement accuracy. A single temperature sensor needs to reach thermal equilibrium to measure an accurate temperature, a process that takes time. This means it cannot immediately obtain human body temperature values, requiring patience to wait for a certain period during measurement. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an electronic thermometer for multi-sensor collaborative temperature measurement. The technical problems it aims to solve are: inaccurate temperature measurement by a single temperature sensor, the need to wait for thermal equilibrium, low temperature detection efficiency; poor consistency and stability of sensor assembly processes, resulting in low yield; and temperature measurement deviation caused by changes in the temperature measurement environment during the measurement process.

[0007] The technical problem to be solved by this invention can be achieved by the following technical solution: An electronic thermometer for multi-sensor coordinated temperature measurement includes a flexible circuit board, a first main temperature sensor, a second main temperature sensor, and a temperature probe. The first main temperature sensor and the second main temperature sensor are disposed adjacent to each other on the flexible circuit board. An ambient temperature sensor is located at another position on the flexible circuit board. The first and second main temperature sensors have different heat transfer rates with the temperature probe. The first and second main temperature sensors are located near the body, while the ambient temperature sensor is located near the environment.

[0008] In a preferred embodiment of the present invention, the first main temperature sensor side at the bottom of the flexible circuit board is soldered to the inner side of the temperature probe via a soldering layer; the second main temperature sensor side at the bottom of the flexible circuit board is bonded to the inner side of the temperature probe via an adhesive layer; the adhesive layer and the soldering layer have different thermal conductivity coefficients. The first and second main temperature sensors are semiconductor temperature sensing chips or PTC temperature sensing elements; the bottom surfaces of the first and second main temperature sensors are soldered to the pads on the flexible circuit board.

[0009] In a preferred embodiment of the present invention, the first main temperature sensor and the temperature probe are heat-transferred through a first thermally conductive structure, the first thermally conductive structure including a large-area pad and a first thermally conductive hole. Large-area pads are disposed on one or both sides of the flexible circuit board; the area of ​​the large-area pads is more than 50% of the bottom area of ​​the first main temperature sensor. At least two first heat conduction holes are provided at the large area solder pad, and at least two first heat conduction holes pass through the flexible circuit board vertically. The first heat-conducting hole is filled with a heat-conducting material, or the first heat-conducting hole is filled with copper by electroplating.

[0010] In a preferred embodiment of the present invention, a lower housing is further included, the lower housing including a flexible circuit channel and a notched post, the flexible circuit channel being laterally disposed on the inner bottom wall of the lower housing, and the notched post being longitudinally disposed on the right end of the flexible circuit channel; The right end of the flexible circuit board is a bent section, and the ambient temperature sensor is provided on the top surface of the right end bent section of the flexible circuit board; the bent section of the flexible circuit board bends upward, and then the bottom surface of the bent section abuts against the top of the hole notch post, and the ambient temperature sensor is placed upside down at the top center of the hole notch post. The second main temperature sensor and the first main temperature sensor are respectively located on the side closer to the human body to be detected; the hole-shaped column longitudinally supports the ambient temperature sensor on the bent part of the flexible circuit board, thereby forming a longitudinal height difference between the ambient temperature sensor and the middle part of the flexible circuit board, and the ambient temperature sensor is located on the side closer to the external environment.

[0011] In a preferred embodiment of the present invention, the lower housing further includes a probe hole, a plurality of conductive posts, and a skin-friendly double-sided adhesive. The probe hole is located at the center of the lower housing, and the conductive posts are located at the left end of the flexible circuit groove of the lower housing. The flexible circuit board is bent downward and protrudes at the probe hole, and the flexible circuit board is sleeved on the plurality of conductive posts through the sleeve conductive hole at the left end. The protrusion of the temperature sensor abuts against the inner side of the lower housing, and the probe portion of the temperature sensor extends out of the probe hole; the first main temperature sensor and the temperature sensor are sequentially arranged at the bottom center of the flexible circuit board. The bottom surface of the double-sided skin-adhesive is used to adhere to the skin, and the top surface of the double-sided skin-adhesive is adhered to the bottom surface of the lower housing; the double-sided skin-adhesive is provided with a clearance hole for avoiding the temperature sensing probe.

[0012] In a preferred embodiment of the present invention, it further includes an upper housing, a battery, a main circuit board, an adhesive sheet, a plurality of charging copper pillars, and a plurality of charging pillar holes, wherein the battery, the main circuit board, and the adhesive sheet are sequentially and laterally connected between the upper housing and the lower housing; A plurality of charging post holes are evenly spaced on one side of the lower housing, and the top ends of a plurality of charging copper posts are respectively connected to the bottom surface of the adhesive sheet. The plurality of charging copper posts extend longitudinally through the charging post holes of the lower housing and protrude outward. The top surface of the flexible circuit board abuts against the bottom surface of the battery at its center, and the top of the conductive post sleeved on the left end of the flexible circuit board abuts against the bottom surface of the main circuit board.

[0013] In a preferred embodiment of the present invention, it further includes a pair of magnets, a pair of upper magnet slots, a magnet through hole, a pair of lower magnet slots, a pair of first positioning posts, a pair of positioning post through holes, a positioning hole post, and a second positioning post, wherein the pair of magnets respectively abut against both ends of the adhesive sheet; The inner bottom wall of the upper housing is provided with a pair of upper magnet slots, the periphery of the main circuit board is provided with magnet through holes, and the inner bottom wall of the lower housing is provided with a pair of lower magnet slots; the top and bottom of the pair of magnets are respectively locked in the pair of upper magnet slots and lower magnet slots, and the middle part of one of the magnets passes through the magnet through hole; A pair of first positioning posts are spaced apart on both sides of the inner surface of the lower housing, and a pair of positioning post through holes are provided on the main circuit board. The middle part of the pair of first positioning posts passes through the pair of positioning post through holes. A positioning hole post is provided on one side of the inner surface of the lower housing, and a second positioning post is provided at a corresponding position on the inner surface of the upper housing. The second positioning post is inserted into the hole of the positioning hole post.

[0014] A temperature measurement method for an electronic thermometer, applied to the aforementioned electronic thermometer, the temperature measurement method comprising: Step S1: Under different detection temperatures of the first main temperature sensor, calibrate the first heating and cooling rate Δv1 of the first main temperature sensor within the segmented temperature range; under different detection temperatures of the second main temperature sensor, calibrate the second heating and cooling rate Δv2 of the second main temperature sensor within the segmented temperature range. Step S2: During temperature measurement, the first measured temperature T is obtained through the first main temperature sensor. A1 The real-time first heating / cooling rate Δv1 corresponding to the first main temperature sensor is obtained by matching; the second measured temperature T is obtained through the second main temperature sensor. A2 The real-time second heating and cooling rate Δv2 corresponding to the second main temperature sensor is obtained by matching. Step S3: Obtain the thermal resistance ratio between the first main temperature sensor and the second main temperature sensor under different measurement environments, and then obtain the time constant ratio k between the first main temperature sensor and the second main temperature sensor; Step S4: Based on the real-time first heating and cooling rate Δv1, the real-time second heating and cooling rate Δv2 and the time constant ratio k, predict the true temperature value of the body temperature to be measured in advance before the first main temperature sensor and the second main temperature sensor tend to stabilize.

[0015] In a preferred embodiment of the present invention, the temperature measurement method of the electronic thermometer includes: Step S11: Collect the real-time measured body temperature T values ​​obtained from several primary temperature sensors. A1 The data, along with several corresponding heating and cooling rates, are used to create a first sample curve plotting the real-time first human body temperature value versus the heating and cooling rate; the real-time second human body temperature value T is collected from several second main temperature sensors. A2 And several corresponding data samples of heating and cooling rates, plotted as a second sample curve of real-time second human body temperature value and heating and cooling rate; Step S12: Collect several first measured body temperature values ​​T A1 The measured body temperature values ​​were divided into several standard intervals, and the first temperature rise / fall rate Δv1 corresponding to each standard interval was calibrated; several second measured body temperature values ​​T were then... A2The measured body temperature values ​​are divided into several standard intervals, and the second heating and cooling rate Δv2 corresponding to each standard interval is calibrated; that is, two sets of calibration datasets of the main temperature sensor and the heating and cooling rate are formed, and the heating and cooling rate calibration dataset is represented by a linear regression model. Step S21: Obtain the real-time first body temperature value T of the human body currently detected by the first main temperature sensor. A1 And the real-time second body temperature value T of the human body currently detected by the second main temperature sensor. B1 ; Step S22: Record the real-time first body temperature value T A1 The real-time first body temperature value T is determined by comparing it with the standard intervals of several groups of first measured body temperature values ​​in step S12. A1 If the temperature falls within a certain range of the first measured body temperature values, the corresponding real-time first temperature rise / fall rate Δv1 can be obtained; the real-time second body temperature value T... A2 By comparing the measured body temperature values ​​with the standard intervals of several groups in step S12, the real-time body temperature value T is determined. A2 If the temperature falls within the range of a certain group of second measured body temperature values, the corresponding real-time second heating / cooling rate Δv2 can be obtained. Step S31: The definition formula for the heating time constant is: t1=R1C, t2=R2C, and t1≠t2; Step S32: Set the ratio of heating time constants to k, where k is the ratio between heating time constants t1 and t2. The formula for calculating k is: ; Both the first and second main temperature sensors are contact-type digital temperature sensors. They are the same model of sensor but different addresses, meaning they have the same thermal capacity and capacitance. Step S33: Calculate the ratio k of the heating time constant between the first heating time constant and the second heating time constant based on the first thermal resistance value of the first main temperature sensor and the second thermal resistance value of the second main temperature sensor; Step S41: The first body temperature value T obtained from step S2 A1 Second body temperature value T A2 Given the known ratio of heating time constants k, search for and collect known calculation formulas related to the final true body temperature value T2 that can be calculated; among them, the known calculation formulas include the dynamic equation of the sensor's thermal balance relationship, the formula for the rate of temperature change, and the definition formula for the heating time constant. Step S42: Derive the formula for calculating the final true human body temperature value by using at least two relevant known calculation formulas; Step S43: The first body temperature value T obtained in the above steps A1 Second body temperature value T A2 The first heating and cooling rate Δv1, the second heating and cooling rate Δv2, and the ratio of heating time constant k are substituted into the formula for calculating the final true body temperature of the human body in step S42 above, and the true body temperature T2 is finally calculated.

[0016] In a preferred embodiment of the present invention, step S1 of the temperature measurement method of the electronic thermometer includes: Step S111: First, place the electronic thermometer in contact with the human skin and keep it stable, recording the temperature measured by the first main temperature sensor from the initial temperature T. A1 The time taken to reach a certain temperature value T2 is t1. The second main temperature sensor is based on the initial measured temperature T. A2 The time taken to reach a certain temperature value T2 is t2; The temperature change rates of the first and second main temperature sensors within the temperature range T1-T2 are calculated as Δv1 and Δv2, respectively. The formulas for calculating the temperature change rate of the first and second main temperature sensors are as follows: ; ; Where T1 is the human body temperature value at the initial measurement time, T2 is the human body temperature value at the final measurement time, t1 is the measurement time required for the first main temperature sensor to detect the temperature value of T2, and t2 is the measurement time required for the second main temperature sensor to detect the temperature value of T2.

[0017] In a preferred embodiment of the present invention, step S4 of the temperature measurement method of the electronic thermometer includes: Step S411: The dynamic equations for the thermal balance relationship between the first main temperature sensor and the second main temperature sensor are as follows: ; ; Where R represents thermal resistance and C represents heat capacity; The rate of temperature increase or decrease of the main temperature sensor depends on the difference between the actual human body temperature T2 and the current temperature T of the main sensor; the larger the difference between the current temperature T of the main sensor and the current temperature T of the main sensor, the faster the temperature rises; the smaller the difference between the current temperature T of the main sensor and the current temperature T of the main sensor, the slower the temperature rises. The formula for the heating time constant is: t1=R1C, t2=R2C, and t1≠t2; The thermal resistance R value will change with the tightness of the garment, skin sweating, and arm movement. The heating time constants t1 and t2 are not fixed, but the ratio between the heating time constants t1 and t2 is fixed.

[0018] In a preferred embodiment of the present invention, the temperature measurement method of the electronic thermometer, step S4, the derivation process of the true body temperature calculation formula includes: Step S421: Establish 3 basic computational equations; The current temperature T of the first main temperature sensor A1 The temperature is continuously increased at a rate of Δv1, and reaches the final temperature T2 after a heating time constant t1. The calculation formula is as follows: (1) The current temperature T of the second main temperature sensor A2 The temperature is continuously increased at a rate of Δv2, and reaches the final temperature T2 after time t2. The calculation formula is: (2) The ratio of heating time constants, k: (3) Step S422: Equation substitution and transformation; Substitute formula (3) into formula (1) to obtain formula (4); Solve for t2 from formula (2) to obtain formula (5); Substitute formula (5) into formula (4); Eliminate the denominator, rearrange the term T2, and combine the constant terms; then we obtain the formula for calculating the true human body temperature T2: ; Given the current temperatures, heating / cooling rates, and time ratio k of the first and second main temperature sensors, the final equilibrium temperature of the human body can be calculated.

[0019] In a preferred embodiment of the present invention, the temperature measurement method of the electronic thermometer further includes: Step S61: Detect the body temperature at the same location on the human body and calibrate the steady-state correction coefficient α of the ambient temperature sensor to the main temperature sensor; Step S62: When the electronic thermometer is in stable contact with the human body, the ambient temperature sensor detects the current stable ambient temperature value T. E2 ; Step S63: Record the real-time ambient temperature value detected by the ambient temperature sensor and plot it as an ambient temperature measurement curve. The system calculates the average ambient temperature value T for each fluctuation range based on the ambient temperature measurement curve. E1 ; Step S64: The data sample is summarized to derive the true temperature value compensation and correction formula. The true temperature value compensation and correction formula is: Corrected body temperature = main sensor temperature + α × (current ambient temperature - reference state ambient temperature). Step S65: The actual body temperature value calculated in step S5 above, and the steady-state correction coefficient α and the current ambient temperature value T from step S6. E1 Stable ambient temperature value T E2 Substituting these values ​​into the actual temperature value compensation and correction formula yields the corrected actual temperature value.

[0020] Compared with existing technologies, the advantages of this invention are as follows: An electronic thermometer with multi-sensor collaborative temperature measurement features a first main temperature sensor and a second main temperature sensor arranged adjacent to each other on the top surface of a flexible circuit board. These two main temperature sensors are located near the lower housing and on the side where human body temperature is detected. The two main temperature sensors have different heat transfer rates from the temperature-sensing probe, resulting in different heating and cooling rates. This eliminates the need to wait for thermal equilibrium to be reached, allowing for accurate body temperature measurement. The invention provides accurate temperature detection data and high efficiency, effectively solving the problems of existing electronic thermometers, such as susceptibility to interference, poor adaptability to various scenarios, and measurement deviations.

[0021] In the design, an ambient temperature sensor is mounted on the top surface of the slender portion of the flexible circuit board. This slender portion of the flexible circuit board is bent inwards from top to bottom, with its bottom surface abutting the inner surface of the upper housing. At this location, the ambient temperature sensor is positioned away from the first and second main temperature sensors, on the outer side of the electronic thermometer, away from the human body, to collect data on changes in ambient temperature. When the temperature field changes, the ambient temperature sensor performs a compensation algorithm on the data from the main temperature sensors, promptly correcting the temperature readings. By monitoring temperature field changes and correcting body temperature data in real time, the ambient temperature sensor enhances the accuracy of temperature measurements.

[0022] The electronic thermometer's temperature measurement method combines the temperature rise and fall rates and real-time temperature differences between the first and second main temperature sensors, as well as the real-time fluctuation values ​​monitored by the ambient temperature sensor SE, and incorporates a specific algorithm to quickly calculate the body temperature value T.

[0023] This invention significantly shortens measurement time, eliminating the need to wait for traditional thermal equilibrium. It predicts the true temperature value of the body part being measured before the sensor reaches thermal equilibrium, reducing measurement waiting time and making it suitable for children and patients with acute illnesses. It also improves measurement accuracy by dynamically correcting the body temperature value through parameter compensation from the ambient temperature sensor, resulting in a result closer to the true body temperature. Furthermore, it is highly adaptable, suitable for different measurement sites and environmental conditions. Attached Figure Description

[0024] The disclosure of this invention is illustrated with reference to the accompanying drawings; it should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention; in the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0025] Figure 1 This is a three-dimensional structural diagram of an electronic thermometer for multi-sensor collaborative temperature measurement according to the present invention.

[0026] Figure 2 This is one of the exploded structural diagrams of an electronic thermometer for multi-sensor coordinated temperature measurement according to the present invention.

[0027] Figure 3 This is the second exploded structural diagram of an electronic thermometer for multi-sensor coordinated temperature measurement according to the present invention.

[0028] Figure 4 This is a schematic diagram of the internal structure of an electronic thermometer for multi-sensor collaborative temperature measurement according to the present invention.

[0029] Figure 5 This is a schematic diagram of the first and second thermally conductive structures of the electronic thermometer of the present invention.

[0030] Figure 6 This is a schematic diagram of the temperature sensor and environmental sensor of the electronic thermometer of the present invention.

[0031] Figure 7 This is a cross-sectional view of the electronic thermometer of the present invention.

[0032] Figure 8 This is a schematic flowchart of the temperature measurement method of the electronic thermometer of the present invention.

[0033] Figure 9 This is a schematic diagram of the temperature curve measured in real time by the main temperature sensor of the electronic thermometer of the present invention.

[0034] Figure 10 This is a schematic diagram of the temperature curve measured in real time by the ambient temperature sensor of the electronic thermometer of the present invention.

[0035] Figure label: S1, first main temperature sensor; S2, second main temperature sensor; SE, ambient temperature sensor.

[0036] 1. Flexible circuit board; 11. Large-area solder pads; 12. First thermal via; 21. Temperature sensor; 22. Ambient temperature sensor; 23. Solder layer; 24. Adhesive layer.

[0037] 3. Lower housing; 32. Hole notch post; 33. Flexible circuit channel; 31. Probe hole; 34. Conductive post; 9. Skin-friendly double-sided adhesive; 35. Connecting conductive hole.

[0038] 61. Magnet; 62. Lower magnet slot; 63. Upper magnet slot; 64. Magnet through hole; 65. First positioning post; 66. Positioning post through hole; 74. Second positioning post; 75. Positioning hole post.

[0039] 4. Upper casing. 81. Battery; 84. Main circuit board; 86. Adhesive sheet; 76. Charging copper pillar; 85. Charging pillar hole. Detailed Implementation

[0040] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0041] See Figures 1 to 4 The figure shows an electronic thermometer for multi-sensor coordinated temperature measurement, including a flexible circuit board 1, a first main temperature sensor S1, a second main temperature sensor S2 and a temperature probe 21. The first main temperature sensor S1 and the second main temperature sensor S2 are arranged adjacent to each other on the flexible circuit board 1. An ambient temperature sensor SE is provided at another location on the flexible circuit board 1. The first main temperature sensor S1 and the second main temperature sensor S2 have different heat transfer rates with the temperature probe 21. The first main temperature sensor S1 and the second main temperature sensor S2 are located near the body, and the ambient temperature sensor SE is located near the environment.

[0042] This invention features a first main temperature sensor S1 and a second main temperature sensor S2 adjacent to each other on the top surface of the middle section of a flexible circuit board 1. The first main temperature sensor S1 and the second main temperature sensor S2 are close to the lower housing 3 and located on the side where human body temperature is detected. The two main temperature sensors of the electronic thermometer have different heat transfer rates from the temperature-sensing probe, resulting in different heating and cooling rates. This eliminates the need to wait for thermal equilibrium to be reached, allowing for accurate body temperature measurement. The invention provides accurate temperature detection data and high detection efficiency, effectively solving the problems of existing electronic thermometers, such as susceptibility to interference, poor adaptability to various scenarios, and measurement deviations.

[0043] In the design, an ambient temperature sensor SE is installed on the top surface of the slender portion of the flexible circuit board 1. The slender portion of the flexible circuit board 1 is bent inward from top to bottom, with its bottom surface abutting against the inner surface of the upper housing 4. At this time, the ambient temperature sensor SE is located away from the first main temperature sensor S1 and the second main temperature sensor S2, on the outer side of the electronic thermometer product away from the human body, and is used to collect changes in ambient temperature. When the temperature field changes, the ambient temperature sensor SE performs a compensation algorithm on the data from the main temperature sensors to correct the temperature measurement data in a timely manner. By increasing the monitoring of temperature field changes by the ambient temperature sensor SE and correcting the body temperature data in real time, the temperature measurement becomes more accurate.

[0044] Specifically, multiple main temperature sensors use the same model of contact-type digital temperature sensor, and the main temperature sensors are of the same model but different addresses to ensure consistent performance. The FPC is thin (0.1mm), flexible, and fits the probe more tightly, resulting in faster heat conduction to the temperature sensing element. The FPC and the temperature probe are soldered together with solder paste. Solder paste has a high thermal conductivity (54-67W / (mK)), a thin and controllable solder thickness (<0.1mm), a strong and tight contact, low thermal resistance, and excellent process consistency, resulting in extremely high thermal conductivity.

[0045] Combination Figures 5 to 7 In this preferred embodiment, the electronic thermometer further includes a welding layer 23 and an adhesive layer 24. The first main temperature sensor S1 side at the bottom of the flexible circuit board 1 is welded to the inner side of the temperature probe 21 through the welding layer 23; the second main temperature sensor S2 side at the bottom of the flexible circuit board 1 is bonded to the inner side of the temperature probe 21 through the adhesive layer 24; the adhesive layer 24 and the welding layer 23 have different thermal conductivity coefficients.

[0046] Furthermore, the first main temperature sensor S1 and the temperature probe 21 are heat-transferred through a first thermally conductive structure, which includes a large-area pad 11 and a first thermally conductive hole 12. Large-area pads 11 are disposed on one or both sides of the flexible circuit board 1, and the area of ​​the large-area pads 11 is more than 50% of the bottom area of ​​the first main temperature sensor S1. At least two first thermal conductive holes 12 are provided at the large area pad 11, and the at least two first thermal conductive holes 12 extend through the flexible circuit board 1 vertically; the first thermal conductive holes 12 are filled with thermal conductive material, or the first thermal conductive holes 12 are filled with copper by hole-filling electroplating.

[0047] Specifically, the adhesive layer and the solder layer have different thermal conductivity coefficients. In another embodiment, the bottom of the flexible circuit board 1 is connected to the inner side of the temperature probe 21 via an insulating layer on the side of the second main temperature sensor S2.

[0048] The first main temperature sensor S1 at the bottom of the flexible circuit board 1 is soldered to the temperature probe 21 through a soldering layer. At least two first heat-conducting holes 12 are provided on the first main temperature sensor S1 side of the flexible circuit board 1. The second main temperature sensor S2 at the bottom of the flexible circuit board 1 is bonded to the temperature probe 21 through an adhesive layer. The adhesive layer and the soldering layer have different thermal conductivity. The heat transfer between the first main temperature sensor S1 and the temperature probe 21 is based on the first thermal conductivity, and the heat transfer between the second main temperature sensor S2 and the temperature probe 21 is based on the second thermal conductivity. The first thermal conductivity and the second thermal conductivity are different.

[0049] The first main temperature sensor S1 and the second main temperature sensor S2 have different heat transfer rates with the temperature probe 21, thereby achieving a difference in the temperature sensing rate of two or more main temperature sensors; this solves the problem of temperature measurement deviation caused by changes in the temperature measurement scenario during the temperature measurement process, and the temperature measurement is more accurate and efficient with at least two main temperature sensors; the sensor assembly process has good stability and high yield.

[0050] Furthermore, the sensor standard components and temperature probe 21 are soldered using solder paste, a mature and stable process with good consistency, high yield, and fast thermal conductivity. Because their performance is consistent, they reach the same thermal equilibrium temperature, but at different times; these varying heating and cooling rates provide the basis for the implantation algorithm.

[0051] In this preferred embodiment, the second main temperature sensor S2 and the temperature probe 21 are heat-transferred through a second heat-conducting structure. The second heat-conducting structure includes a second heat-conducting hole. A second heat-conducting hole that runs vertically through the second main temperature sensor S2 side at the bottom of the flexible circuit board 1 is provided. The second heat-conducting hole is filled with a thermally conductive material, or the second heat-conducting hole is filled with copper by electroplating; the first heat-conducting hole 12 and the second heat-conducting hole have different thermal conductivity coefficients.

[0052] Specifically, the aperture and filling material of the first heat-conducting hole 12 can be designed according to design requirements, so that the first heat-conducting hole 12 and the second heat-conducting hole have different thermal conductivity coefficients.

[0053] Furthermore, the first main temperature sensor S1 and the second main temperature sensor S2 are semiconductor temperature measuring chips or PTC temperature sensing elements; the bottom surfaces of the first main temperature sensor S1 and the second main temperature sensor S2 are soldered to the pads of the flexible circuit board 1.

[0054] In this preferred embodiment, a lower housing 3 is also included. The lower housing 3 includes a flexible circuit channel 33 and a hole notch 32. The flexible circuit channel 33 is arranged laterally on the inner bottom wall of the lower housing 3, and the hole notch 32 is arranged longitudinally on the right end of the flexible circuit channel 33. The right end of the flexible circuit board is a bend, and an ambient temperature sensor is installed on the top surface of the bend at the right end of the flexible circuit board. The bend of the flexible circuit board bends upward, and then the bottom surface of the bend abuts against the top of the hole notch 32. The ambient temperature sensor is placed upside down at the top center of the hole notch 32. The second main temperature sensor and the first main temperature sensor are respectively located on the side closer to the human body to be detected; the hole-notch column 32 longitudinally supports the ambient temperature sensor on the bent part of the flexible circuit board, thereby forming a longitudinal height difference between the ambient temperature sensor and the middle part of the flexible circuit board, and the ambient temperature sensor is located on the side closer to the external environment.

[0055] Specifically, before the right end of the flexible circuit board 1 is bent upward, the ambient temperature probe 22, the side of the ambient temperature probe 22 of the flexible circuit board 1, and the ambient temperature sensor SE are bonded or welded sequentially from bottom to top; the bottom wall of the lower housing 3 is provided with a hole notch 32. After the flexible circuit board 1 is bent, the side of the ambient temperature probe 22 of the flexible circuit board 1 is bent and set at the upper end of the hole notch 32, and the top surface of the ambient temperature probe 22 abuts against the inner side of the upper housing 4.

[0056] The aforementioned notched post 32 is used to support the ambient temperature probe 22, so that there is an axial distance between the ambient temperature probe 22 and the temperature sensing probe 21, which can measure the human body temperature value and the external ambient temperature value respectively; the temperature sensing probe 21 extends out of the probe hole 31, which is convenient for contacting human skin to detect temperature.

[0057] Furthermore, the lower housing 3 also includes a probe hole 31, several conductive posts 34, a connecting conductive hole 35, and a skin-adhesive double-sided adhesive 9. The probe hole 31 is located at the center of the lower housing 3, and the conductive posts 34 are located at the left end of the flexible circuit groove of the lower housing 3. The flexible circuit board is bent downward and protrudes at the probe hole 31, and the flexible circuit board is connected to several conductive posts 34 through the connecting conductive hole 35 at the left end. The protrusion of the temperature sensor abuts against the inner side of the lower housing 3, and the probe part of the temperature sensor extends out of the probe hole 31; the first main temperature sensor and the temperature sensor are sequentially arranged at the bottom center of the flexible circuit board. The bottom surface of the double-sided skin-adhesive patch 9 is used to adhere to the skin, and the top surface of the double-sided skin-adhesive patch 9 is used to adhere to the bottom surface of the lower housing 3; the double-sided skin-adhesive patch 9 is provided with a clearance hole for avoiding the temperature sensing probe.

[0058] Specifically, the left end of the flexible circuit board 1 is mounted on the lower housing 3 via the conductive post 34, and its outer periphery is clamped in the flexible circuit channel 33. The right end is bent and abuts against the top of the hole post 32.

[0059] The inner wall of the lower housing 3 is provided with flexible circuit channels 33 and conductive pillars 34 to provide guidance and positioning for the flexible circuit board 1, thereby fixing the positions of the temperature sensing probe 21 and the ambient temperature probe 22, and the temperature detection of the probe will not be affected by displacement.

[0060] In this preferred embodiment, it also includes an upper housing 4, a battery 81, a main circuit board 84, an adhesive sheet 86, a plurality of charging copper pillars 83, and a plurality of charging pillar holes 85. The battery 81, the main circuit board 84, and the adhesive sheet 86 are sequentially and laterally connected between the upper housing 4 and the lower housing 3. Several charging post holes 85 are evenly spaced on one side of the lower housing 3, and the tops of several charging copper posts 83 are respectively connected to the bottom surface of the adhesive sheet 86. Several charging copper posts 83 extend longitudinally through the charging post holes 85 of the lower housing 3 and protrude. The top surface of the flexible circuit board 1 abuts against the bottom surface of the battery 81 at its center, and the top of the conductive post 34 sleeved on the left end of the flexible circuit board 1 abuts against the bottom surface of the main circuit board 84.

[0061] Specifically, at least two charging copper pillars 83 are provided; preferably, four charging copper pillars 83 are evenly spaced. The battery 81, main circuit board 84, and adhesive sheet 86 are sequentially and laterally connected between the upper housing 4 and the lower housing 3, which facilitates the positioning of the battery 81, ensures stable charging, and prevents displacement during the charging process.

[0062] Furthermore, it also includes a pair of magnets 61, a pair of upper magnet slots 63, a magnet through hole 64, a pair of lower magnet slots 62, a pair of first positioning posts 65, a pair of positioning post through holes 66, a positioning hole post 75, and a second positioning post 74. The pair of magnets 61 respectively abut against both ends of the adhesive sheet 86. The inner bottom wall of the upper housing 4 is provided with a pair of upper magnet slots 63, the periphery of the main circuit board 84 is provided with magnet through holes 64, and the inner bottom wall of the lower housing 3 is provided with a pair of lower magnet slots 62; the top and bottom of a pair of magnets 61 are respectively locked in a pair of upper magnet slots 63 and lower magnet slots 62, and the middle part of one of the magnets 61 passes through the magnet through hole 64. A pair of first positioning posts 65 are spaced apart on both sides of the inner surface of the lower housing 3. A pair of positioning post through holes 66 are provided on the main circuit board 84. The middle part of the pair of first positioning posts 65 passes through the pair of positioning post through holes 66. A positioning hole post 75 is provided on one side of the inner surface of the lower housing 3. A second positioning post 74 is provided at the corresponding position on the inner surface of the upper housing 4. The second positioning post 74 is inserted into the hole of the positioning hole post 75.

[0063] The two ends of the aforementioned magnet 61 are engaged between the lower magnet slot 62 and the upper magnet slot 63. A pair of magnets 61 magnetically attract the lower housing 3 and the upper housing 4 respectively. The lower housing 3 and the upper housing 4 are fastened and fixed, further stabilizing the layout of each component.

[0064] A temperature measurement system for an electronic thermometer includes a controller, a signal acquisition module, a signal conversion module, and a data storage module. The signal acquisition module transmits the detected temperature information to the data storage module in real time. The signal acquisition module includes a first main temperature sensor, a second main temperature sensor, and an ambient temperature sensor. The signal conversion module includes a signal conditioning circuit and an analog-to-digital converter. The data storage module includes a database and cloud storage.

[0065] A temperature measurement method for an electronic thermometer, applied to the aforementioned electronic thermometer, the temperature measurement method comprising: Step S1: Under different detection temperatures of the first main temperature sensor, calibrate the first heating and cooling rate Δv1 of the first main temperature sensor within the segmented temperature range; under different detection temperatures of the second main temperature sensor, calibrate the second heating and cooling rate Δv2 of the second main temperature sensor within the segmented temperature range. Step S2: During temperature measurement, the first measured temperature T is obtained through the first main temperature sensor. A1 The real-time first heating / cooling rate Δv1 corresponding to the first main temperature sensor is obtained by matching; the second measured temperature T is obtained through the second main temperature sensor. A2 The real-time second heating and cooling rate Δv2 corresponding to the second main temperature sensor is obtained by matching. Step S3: Obtain the thermal resistance ratio between the first main temperature sensor and the second main temperature sensor under different measurement environments, and then obtain the time constant ratio k between the first main temperature sensor and the second main temperature sensor; Step S4: Based on the real-time first heating and cooling rate Δv1, the real-time second heating and cooling rate Δv2, and the ratio of the time constant k, the true temperature value of the body temperature to be measured is predicted in advance before the first and second main temperature sensors stabilize.

[0066] Furthermore, the temperature measurement method of the electronic thermometer includes: Step S11: Collect the real-time measured body temperature T values ​​obtained from several primary temperature sensors. A1 The data, along with several corresponding heating and cooling rates, are used to create a first sample curve plotting the real-time first human body temperature value versus the heating and cooling rate; the real-time second human body temperature value T is collected from several second main temperature sensors. A2 And several corresponding data samples of heating and cooling rates, plotted as a second sample curve of real-time second human body temperature value and heating and cooling rate; Step S12: Collect several first measured body temperature values ​​T A1 The measured body temperature values ​​were divided into several standard intervals, and the first temperature rise / fall rate Δv1 corresponding to each standard interval was calibrated; several second measured body temperature values ​​T were then... A2 The measured body temperature values ​​are divided into several standard intervals, and the second heating and cooling rate Δv2 corresponding to each standard interval is calibrated; that is, two sets of calibration datasets of the main temperature sensor and the heating and cooling rate are formed, and the heating and cooling rate calibration dataset is represented by a linear regression model. Step S21: Obtain the real-time first body temperature value T of the human body currently detected by the first main temperature sensor. A1 And the real-time second body temperature value T of the human body currently detected by the second main temperature sensor. B1 ; Step S22: Record the real-time first body temperature value T A1 The real-time first body temperature value T is determined by comparing it with the standard intervals of several groups of first measured body temperature values ​​in step S12. A1 If the temperature falls within a certain range of the first measured body temperature values, the corresponding real-time first temperature rise / fall rate Δv1 can be obtained; the real-time second body temperature value T... A2 By comparing the measured body temperature values ​​with the standard intervals of several groups in step S12, the real-time body temperature value T is determined. A2 If the temperature falls within the range of a certain group of second measured body temperature values, the corresponding real-time second heating / cooling rate Δv2 can be obtained. Step S31: The definition formula for the heating time constant is: t1=R1C, t2=R2C, and t1≠t2; Step S32: Set the ratio of heating time constants to k, where k is the ratio between heating time constants t1 and t2. The formula for calculating k is: ; Both the first and second main temperature sensors are contact-type digital temperature sensors. They are the same model of sensor but different addresses, meaning that their thermal capacitive values ​​are approximately the same and their capacitance values ​​are equal. Step S33: Calculate the ratio k of the heating time constant between the first heating time constant and the second heating time constant based on the first thermal resistance value of the first main temperature sensor and the second thermal resistance value of the second main temperature sensor; Step S41: The first body temperature value T obtained from step S2 A1 Second body temperature value T A2 Given the known ratio of heating time constants k, search for and collect known calculation formulas related to the final true body temperature value T2 that can be calculated; among them, the known calculation formulas include the dynamic equation of the sensor's thermal balance relationship, the formula for the rate of temperature change, and the definition formula for the heating time constant. Step S42: Derive the formula for calculating the final true human body temperature value by using at least two relevant known calculation formulas; Step S43: The first body temperature value T obtained in the above steps A1 Second body temperature value T A2 The first heating and cooling rate Δv1, the second heating and cooling rate Δv2, and the ratio of heating time constant k are substituted into the formula for calculating the final true body temperature of the human body in step S42 above, and the true body temperature T2 is finally calculated.

[0067] Specifically, the sample curves of ambient temperature and heating / cooling rate visually represent the dynamic changes of the sensor before it stabilizes.

[0068] The temperature measurement method of the electronic thermometer of this invention, when designed with a single main temperature sensor, can obtain an accurate real-time body temperature value T when the main temperature sensor and the ambient temperature sensor eventually reach thermal equilibrium. This invention uses two main temperature sensors, combining the temperature rise and fall rates of the first main temperature sensor S1 and the second main temperature sensor S2, the real-time temperature difference, and the real-time fluctuation value monitored by the ambient temperature sensor SE, and embedding a specific algorithm to quickly calculate the body temperature value T.

[0069] Specifically, based on the measured body temperature values ​​obtained from the two main temperature sensors, the temperature ranges in the sample database are matched to obtain the corresponding heating / cooling rate values. The formula for calculating the final true body temperature is derived using a known formula, and the heating / cooling rate value and the time constant ratio are substituted to obtain the final true body temperature value. Based on the current and stable ambient temperature values ​​obtained from the ambient temperature sensor, the steady-state correction coefficient from the sample database is retrieved and substituted into the true temperature value compensation and correction formula to obtain the corrected final true body temperature value.

[0070] This invention significantly shortens measurement time, eliminating the need to wait for traditional thermal equilibrium. It predicts the true temperature value of the body part being measured before the sensor reaches thermal equilibrium, reducing measurement waiting time and making it suitable for children and patients with acute illnesses. It also improves measurement accuracy by dynamically correcting the body temperature value through parameter compensation from the ambient temperature sensor, resulting in a result closer to the true body temperature. Furthermore, it is highly adaptable, suitable for different measurement sites and environmental conditions.

[0071] In this preferred embodiment, step S1 of the temperature measurement method of the electronic thermometer includes: Step S111: First, place the electronic thermometer in contact with the human skin and keep it stable, recording the temperature measured by the first main temperature sensor from the initial temperature T. A1 The time taken to reach a certain temperature value T2 is t1. The second main temperature sensor is based on the initial measured temperature T. A2 The time taken to reach a certain temperature value T2 is t2; The temperature change rates of the first and second main temperature sensors within the temperature range T1-T2 are calculated as Δv1 and Δv2, respectively. The formulas for calculating the temperature change rate of the first and second main temperature sensors are as follows: ; ; Where T1 is the human body temperature value at the initial measurement time, T2 is the human body temperature value at the final measurement time, t1 is the measurement time required for the first main temperature sensor to detect the temperature value of T2, and t2 is the measurement time required for the second main temperature sensor to detect the temperature value of T2.

[0072] In this preferred embodiment, step S4 of the temperature measurement method of the electronic thermometer includes: Step S411: The dynamic equations for the thermal balance relationship between the first main temperature sensor and the second main temperature sensor are as follows: ; ; Where R represents thermal resistance (the degree of obstruction to heat transfer), and C represents heat capacity (the ability to store heat). The rate of temperature increase or decrease of the main temperature sensor depends on the difference between the actual human body temperature T2 and the current temperature T of the main sensor; the larger the difference between the current temperature T of the main sensor and the current temperature T of the main sensor, the faster the temperature rises; the smaller the difference between the current temperature T of the main sensor and the current temperature T of the main sensor, the slower the temperature rises. The formula for the heating time constant is: t1=R1C, t2=R2C, and t1≠t2; The thermal resistance R value will change with the tightness of the garment, skin sweating, and arm movement. The heating time constants t1 and t2 are not fixed, but the ratio between the heating time constants t1 and t2 is fixed.

[0073] Furthermore, the temperature measurement method of the electronic thermometer, the derivation process of the true body temperature calculation formula in step S4 includes: Step S421: Establish 3 basic computational equations; The current temperature T of the first main temperature sensor A1 The temperature is continuously increased at a rate of Δv1, and reaches the final temperature T2 after a heating time constant t1. The calculation formula is as follows: (1) The current temperature T of the second main temperature sensor A2 The temperature is continuously increased at a rate of Δv2, and reaches the final temperature T2 after time t2. The calculation formula is: (2) The ratio of heating time constants, k: (3) Step S422: Substitute equations into transformation; substitute formula (3) into formula (1): (4) Solve for t2 using formula (2): (5) Substitute formula (5) into formula (4): ; Step S112: Eliminate the denominator, rearrange the term T2, and combine the constant terms; simplify to obtain the formula for calculating the true human body temperature T2: ; ; ; Given the current temperatures, heating / cooling rates, and time ratio k of the first and second main temperature sensors, the final equilibrium temperature of the human body can be calculated.

[0074] In this preferred embodiment, the temperature measurement method of the electronic thermometer further includes: Step S61: Detect the body temperature at the same location on the human body and calibrate the steady-state correction coefficient α of the ambient temperature sensor to the main temperature sensor; Step S62: When the electronic thermometer is in stable contact with the human body, the ambient temperature sensor detects the current stable ambient temperature value T. E2 ; Step S63: Record the real-time ambient temperature value detected by the ambient temperature sensor and plot it as an ambient temperature measurement curve. The system calculates the average ambient temperature value T for each fluctuation range based on the ambient temperature measurement curve. E1 ; Step S64: The data sample is summarized to derive the real temperature value compensation and correction formula. The real temperature value compensation and correction formula is: Corrected body temperature = main sensor temperature + α × (current ambient temperature - reference state ambient temperature), where the reference state is the state when the human body is inactive and at rest. Step S65: The actual body temperature value calculated in step S5 above, and the steady-state correction coefficient α and the current ambient temperature value T from step S6. E1 Stable ambient temperature value T E2 Substituting these values ​​into the actual temperature value compensation and correction formula yields the corrected actual temperature value.

[0075] Combination Figure 9 and Figure 10 , Figure 9 This is a schematic diagram of a temperature curve obtained by real-time temperature measurement from the two main temperature sensors of the electronic thermometer of the present invention. Figure 10 This is a schematic diagram of a temperature curve measured in real time by an ambient temperature sensor. The yellow curve in the diagram represents the real-time monitoring data of the ambient temperature sensor. The four abnormally low temperature fluctuations and inflection points on the curve all correspond to the moment when the subject opens their arm to measure their axillary temperature.

[0076] Specifically, when the main temperature sensor and the ambient temperature sensor reach thermal equilibrium, an accurate real-time body temperature value T can be obtained. If a faster temperature measurement speed is required, the temperature rise and fall rates and real-time temperature difference between the first main temperature sensor S1 and the second main temperature sensor S2, as well as the real-time fluctuation value monitored by the ambient temperature sensor SE, can be combined to quickly calculate the body temperature value T using a specific algorithm.

[0077] Secondly, during the testing process, the ambient temperature sensor SE, located on the outer side of the product furthest from the human body, monitors the ambient temperature in real time. When the ambient temperature changes, the temperature field changes accordingly (for example, when measuring armpit temperature with the arm open), and the data from the main temperature sensor also changes accordingly, thus affecting the accuracy of the temperature measurement. At this time, the ambient temperature sensor SE shows the largest change, and its real-time fluctuating ambient temperature data is used to compensate and correct the main temperature reading.

[0078] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An electronic thermometer for multi-sensor coordinated temperature measurement, characterized in that, The device includes a flexible circuit board (1), a first main temperature sensor (S1), a second main temperature sensor (S2), and a temperature probe (21). The first main temperature sensor (S1) and the second main temperature sensor (S2) are disposed adjacent to each other on the flexible circuit board (1). The flexible circuit board (1) on the bottom surface of the first main temperature sensor (S1) and the second main temperature sensor (S2) is disposed on the inner side of the temperature probe (21). An ambient temperature sensor (SE) is provided at another location on the flexible circuit board (1). The heat transfer rate ratio between the first main temperature sensor (S1) and the second main temperature sensor (S2) and the temperature probe (21) is N, and N is not equal to 0 and 1. The ambient temperature sensor (SE) is located near the environment, while the first main temperature sensor (S1) and the second main temperature sensor (S2) are located near the body. The flexible circuit board (1) at the bottom of the first main temperature sensor (S1) is welded to the inner side of the temperature probe (21) through a soldering layer (23); the flexible circuit board (1) at the bottom of the second main temperature sensor (S2) is bonded to the inner side of the temperature probe (21) through an adhesive layer (24); the adhesive layer and the soldering layer have different thermal conductivity. The first main temperature sensor (S1) and the second main temperature sensor (S2) are semiconductor temperature measuring chips or PTC temperature sensing elements; the bottom surfaces of the first main temperature sensor (S1) and the second main temperature sensor (S2) are soldered to the pads of the flexible circuit board (1); It also includes a lower housing (3), which includes a flexible circuit channel (33) and a hole notch (32). The flexible circuit channel (33) is arranged laterally on the inner bottom wall of the lower housing (3), and the hole notch (32) is arranged longitudinally on the right end of the flexible circuit channel (33). The right end of the flexible circuit board is a bent part, and the ambient temperature sensor is provided on the top surface of the right end bent part of the flexible circuit board; the bent part of the flexible circuit board bends upward, and then the bottom surface of the bent part abuts against the top of the hole notch (32), and the ambient temperature sensor is placed upside down at the top center of the hole notch (32). The second main temperature sensor and the first main temperature sensor are respectively located on the side close to the human body to be detected; the hole-notch column (32) longitudinally supports the ambient temperature sensor on the bent part of the flexible circuit board, thereby forming a longitudinal height difference between the ambient temperature sensor and the middle part of the flexible circuit board, and the ambient temperature sensor is located on the side close to the external environment. The two main temperature sensors of the electronic thermometer have different heat transfer rates from the temperature sensing probe and have different heating and cooling rates. Before the first and second main temperature sensors stabilize, the true temperature value of the body to be measured can be predicted in advance. The ambient temperature sensor compensates and corrects the data from the main temperature sensor.

2. The electronic thermometer as described in claim 1, characterized in that, The first main temperature sensor (S1) and the temperature probe (21) transfer heat through a first thermal conductive structure, which includes a large-area pad (11) and a first thermal conductive hole (12). Large-area pads (11) are disposed on one or both sides of the flexible circuit board (1), and the area of ​​the large-area pads (11) is more than 50% of the bottom area of ​​the first main temperature sensor (S1). At least two first heat-conducting holes (12) are provided at the large-area pad (11), and at least two first heat-conducting holes (12) pass through the flexible circuit board (1) vertically; the first heat-conducting holes (12) are filled with heat-conducting material, or the first heat-conducting holes (12) are filled with copper by hole-filling electroplating.

3. The electronic thermometer as described in claim 1, characterized in that, The lower housing (3) also includes a probe hole (31), several conductive posts (34), and a skin-adhesive double-sided adhesive (9). The probe hole (31) is located at the center of the lower housing (3), and the conductive posts (34) are located at the left end of the flexible circuit groove of the lower housing (3). The flexible circuit board is bent downward and protrudes at the probe hole (31). The flexible circuit board is sleeved on several conductive posts (34) through the sleeve conductive hole (35) at the left end. The protrusion of the temperature sensor abuts against the inner side of the lower housing (3), and the probe of the temperature sensor extends out of the probe hole (31); the first main temperature sensor and the temperature sensor are sequentially arranged at the bottom center of the flexible circuit board. The bottom surface of the double-sided skin-adhesive patch (9) is used to adhere to the skin, and the top surface of the double-sided skin-adhesive patch (9) is adhered to the bottom surface of the lower housing (3); the double-sided skin-adhesive patch (9) is provided with a clearance hole for avoiding the temperature sensing probe.

4. The electronic thermometer as described in claim 1, characterized in that, It also includes a battery (81), a main circuit board (84), an adhesive sheet (86), several charging copper pillars (83), and several charging pillar holes (85). The battery (81), the main circuit board (84), and the adhesive sheet (86) are sequentially and laterally connected between the upper housing (4) and the lower housing (3). A plurality of charging post holes (85) are evenly spaced on one side of the lower housing (3), and the top ends of a plurality of charging copper posts (83) are respectively connected to the bottom surface of the adhesive sheet (86). The plurality of charging copper posts (83) extend longitudinally through the charging post holes (85) of the lower housing (3) and protrude. The top surface of the flexible circuit board (1) abuts against the bottom surface of the battery (81), and the top of the conductive post (34) sleeved on the left end of the flexible circuit board (1) abuts against the bottom surface of the main circuit board (84).

5. The electronic thermometer as described in claim 1, characterized in that, It also includes a pair of magnets, a pair of magnet upper slots (63), a magnet through hole (64), a pair of magnet lower slots (62), a pair of first positioning posts (65), a pair of positioning post through holes (66), a positioning hole post (75), and a second positioning post (74), wherein the pair of magnets respectively abut against both ends of the adhesive sheet (86); The inner bottom wall of the upper housing (4) is provided with a pair of magnet upper slots (63), the periphery of the main circuit board (84) is provided with magnet through holes (64), and the inner bottom wall of the lower housing (3) is provided with a pair of magnet lower slots (62); the top and bottom of the pair of magnets are respectively locked in the pair of magnet upper slots (63) and magnet lower slots (62), and the middle part of one of the magnets passes through the magnet through hole (64). A pair of first positioning posts (65) are spaced apart on both sides of the inner surface of the lower housing (3), and a pair of positioning post through holes (66) are provided on the main circuit board (84). The middle part of the pair of first positioning posts (65) passes through the pair of positioning post through holes (66). A positioning hole post (75) is provided on one side of the inner surface of the lower housing (3), and a second positioning post (74) is provided at the corresponding position on the inner surface of the upper housing (4). The second positioning post (74) is inserted into the hole of the positioning hole post (75).

6. A method for measuring temperature with an electronic thermometer, characterized in that, Temperature measurement methods include: Step S1: Under different detection temperatures of the first main temperature sensor, calibrate the first heating and cooling rate Δv1 of the first main temperature sensor within the segmented temperature range; under different detection temperatures of the second main temperature sensor, calibrate the second heating and cooling rate Δv2 of the second main temperature sensor within the segmented temperature range. Step S2: During temperature measurement, the first measured temperature T is obtained through the first main temperature sensor. A1 The real-time first heating / cooling rate Δv1 corresponding to the first main temperature sensor is obtained by matching; the second measured temperature T is obtained through the second main temperature sensor. A2 The real-time second heating and cooling rate Δv2 corresponding to the second main temperature sensor is obtained by matching. Step S3: Obtain the thermal resistance ratio between the first main temperature sensor and the second main temperature sensor under different measurement environments, and then obtain the time constant ratio k between the first main temperature sensor and the second main temperature sensor; Step S4: Based on the real-time first heating and cooling rate Δv1, the real-time second heating and cooling rate Δv2, and the ratio of the time constant k, the true temperature value of the body temperature to be measured is predicted in advance before the first and second main temperature sensors stabilize.

7. The temperature measurement method of the electronic thermometer as described in claim 6, characterized in that, The temperature measurement method of the electronic thermometer includes: Step S11: Collect the real-time measured body temperature T values ​​obtained from several primary temperature sensors. A1 The data, along with several corresponding heating and cooling rates, are used to create a first sample curve plotting the real-time first human body temperature value versus the heating and cooling rate; the real-time second human body temperature value T is collected from several second main temperature sensors. A2 And several corresponding data samples of heating and cooling rates, plotted as a second sample curve of real-time second human body temperature value and heating and cooling rate; Step S12: Collect several first measured body temperature values ​​T A1 The measured body temperature values ​​were divided into several standard intervals, and the first temperature rise / fall rate Δv1 corresponding to each standard interval was calibrated; several second measured body temperature values ​​T were then... A2 The measured body temperature values ​​are divided into several standard intervals, and the second heating and cooling rate Δv2 corresponding to each standard interval is calibrated; that is, two sets of calibration datasets of the main temperature sensor and the heating and cooling rate are formed, and the heating and cooling rate calibration datasets are represented by a linear regression model. Step S21: Obtain the real-time first body temperature value T of the human body currently detected by the first main temperature sensor. A1 And the real-time second body temperature value T of the human body currently detected by the second main temperature sensor. B1 ; Step S22: Set the real-time first body temperature value T A1 The real-time first body temperature value T is determined by comparing it with the standard intervals of several groups of first measured body temperature values ​​in step S12. A1 If the temperature falls within a certain range of the first measured body temperature values, then the corresponding real-time first temperature rise / fall rate Δv1 is obtained; the real-time second body temperature value T is... A2 By comparing the measured body temperature values ​​with the standard intervals of several groups in step S12, the real-time body temperature value T is determined. A2 Within the range of a certain group of second measured body temperature values, the corresponding real-time second heating and cooling rate Δv2 is obtained by matching. Step S31: The definition formula for the heating time constant is: t1=R1C, t2=R2C, and t1≠t2; Step S32: Set the ratio of heating time constants to k, where k is the ratio between heating time constants t1 and t2. The formula for calculating k is: ； Both the first and second main temperature sensors are contact-type digital temperature sensors. They are the same model of sensor but different addresses, meaning they have the same thermal capacity and capacitance. Step S33: Calculate the ratio k of the heating time constant between the first heating time constant and the second heating time constant based on the first thermal resistance value of the first main temperature sensor and the second thermal resistance value of the second main temperature sensor; Step S41: The first body temperature value T obtained from step S2 A1 Second body temperature value T A2 Given the known ratio of heating time constants k, search for and collect known calculation formulas related to the final true body temperature value T2 that can be calculated; among them, the known calculation formulas include the dynamic equation of the sensor's thermal balance relationship, the formula for the rate of temperature change, and the definition formula for the heating time constant. Step S42: Derive the formula for calculating the final true human body temperature value by using at least two relevant known calculation formulas; Step S43: Obtain the first body temperature value T A1 Second body temperature value T A2 The first heating and cooling rate Δv1, the second heating and cooling rate Δv2, and the ratio of heating time constant k are substituted into the formula for calculating the final true human body temperature in step S42, and the true human body temperature T2 is finally calculated.

8. The temperature measurement method of the electronic thermometer as described in claim 7, characterized in that, Step S1 in the temperature measurement method of the electronic thermometer includes: Step S111: First, place the electronic thermometer in contact with the human skin and keep it stable, recording the temperature measured by the first main temperature sensor from the initial temperature T. A1 The time taken to reach a certain temperature value T2 is t1. The second main temperature sensor is based on the initial measured temperature T. A2 The time taken to reach a certain temperature value T2 is t2; The temperature change rates of the first and second main temperature sensors within the temperature range T1-T2 are calculated as Δv1 and Δv2, respectively. The formulas for calculating the temperature change rate of the first and second main temperature sensors are as follows: ； ； Where T1 is the human body temperature value at the initial measurement time, T2 is the human body temperature value at the final measurement time, t1 is the measurement time required for the first main temperature sensor to detect the temperature value of T2, and t2 is the measurement time required for the second main temperature sensor to detect the temperature value of T2.

9. The temperature measurement method of the electronic thermometer as described in claim 7, characterized in that, Step S4 in the temperature measurement method of the electronic thermometer includes: Step S411: The dynamic equations for the thermal balance relationship between the first main temperature sensor and the second main temperature sensor are as follows: ； ； Where R represents thermal resistance and C represents heat capacity; The rate of temperature increase or decrease of the main temperature sensor depends on the difference between the actual human body temperature T2 and the current temperature T of the main sensor; the larger the difference between the current temperature T of the main sensor and the current temperature T of the main sensor, the faster the temperature rises; the smaller the difference between the current temperature T of the main sensor and the current temperature T of the main sensor, the slower the temperature rises. The formula for the heating time constant is: t1=R1C, t2=R2C, and t1≠t2; The thermal resistance R value will change with the tightness of the garment, skin sweating, and arm movement. The heating time constants t1 and t2 are not fixed, but the ratio between the heating time constants t1 and t2 is fixed.

10. The temperature measurement method of the electronic thermometer as described in claim 9, characterized in that, The temperature measurement method of the electronic thermometer, the derivation process of the true body temperature calculation formula in step S4 includes: Step S421: Establish 3 basic computational equations; The current temperature T of the first main temperature sensor A1 The temperature is continuously increased at a rate of Δv1, and reaches the final temperature T2 after a heating time constant t1. The calculation formula is as follows: （1） The current temperature T of the second main temperature sensor A2 The temperature is continuously increased at a rate of Δv2, and reaches the final temperature T2 after time t2. The calculation formula is: （2） The ratio of heating time constants, k: (3) Step S422: Equation substitution and transformation; Substitute formula (3) into formula (1) to obtain formula (4); Solve for t2 from formula (2) to obtain formula (5); Substitute formula (5) into formula (4); Eliminate the denominator, rearrange the term T2, and combine the constant terms; then we obtain the formula for calculating the true human body temperature T2: ； Given the current temperatures, heating / cooling rates, and time ratio k of the first and second main temperature sensors, the final equilibrium temperature of the human body can be calculated.

11. The temperature measurement method of the electronic thermometer as described in claim 6, characterized in that, The temperature measurement method of the electronic thermometer further includes: Step S61: Detect the body temperature at the same location on the human body and calibrate the steady-state correction coefficient α of the ambient temperature sensor to the main temperature sensor; Step S62: When the electronic thermometer is in stable contact with the human body, the ambient temperature sensor detects the current reference ambient temperature value T. E2 ; Step S63: Record the real-time ambient temperature value detected by the ambient temperature sensor and plot it as an ambient temperature measurement curve. The system calculates the average ambient temperature value T for each fluctuation range based on the ambient temperature measurement curve. E1 ; Step S64: The data sample is summarized to derive the real temperature value compensation and correction formula. The real temperature value compensation and correction formula is: Corrected body temperature = real body temperature + α × (current ambient temperature - baseline ambient temperature), where the baseline state is the state when the human body is inactive and at rest. Step S65: Combine the actual body temperature value calculated in step S4, the steady-state correction coefficient α from step S6, and the current ambient temperature value T. E1 Reference ambient temperature value T E2 Substituting these values ​​into the actual temperature value compensation and correction formula yields the corrected actual temperature value.

Images