Electronic thermometer and body temperature measuring method

Abstract

The invention relates to the field of body temperature monitoring equipment, and provides an electronic thermometer and a body temperature measuring method, and the electronic thermometer comprises a temperature sensing element and a conversion module. A containing space and a channel are arranged in the temperature sensing element, a liquid conducting medium is arranged in the containing space, the electrodes are arranged at the corresponding positions of the channel at intervals, at least part of the electrodes have temperature values corresponding to the positions of the electrodes, and the liquid conducting medium flows along the channel after expanding, makes contact with the electrodes and is communicated with a circuit where the electrodes are located to form current and generate electric signals. The conversion module detects an electric signal generated by the electrode corresponding to the temperature value and converts the electric signal into the temperature value corresponding to the electrode. The body temperature measuring method is applied to the electronic thermometer. According to the electronic thermometer, the liquid conducting medium can be communicated with the circuit where the electrodes are located after expanding, the power-on state of each electrode with the corresponding temperature value is detected at a certain time interval, the expanding state of the liquid conducting medium can be obtained, and therefore the corresponding temperature value is measured.

Description

Technical Field

[0001] The present invention relates to the field of body temperature monitoring equipment, and further to an electronic thermometer and a body temperature measuring method. Background Art

[0002] Existing thermometers are divided into two categories, one is a mercury thermometer, and the other is an electronic thermometer based on a thermistor.

[0003] Mercury thermometers have accurate test results, but the temperature measurement speed is slow. There is a high probability of mercury poisoning when they are broken. Since 2026, mercury thermometers will be completely discontinued in my country. If other thermal expansion and contraction temperature-sensitive materials are used instead of mercury, there is still the pain point of difficulty in reading, and it is difficult to make the temperature-sensitive material in the microtube return from a high scale to a low scale by shaking. The electronic thermometer has a fast temperature measurement speed. Its principle uses an analog circuit. By detecting the current / voltage of the thermistor, its value has a certain corresponding relationship with the temperature. After the circuit is amplified and corrected, the result is obtained, but due to the deviation of the algorithm, there is a certain deviation between the result and the actual temperature value. Aging of components and attenuation of battery voltage will increase the deviation of the test results. In addition, some electronic thermometers need to be calibrated after long-term use, but consumers cannot perform professional calibration in a home environment, and cannot determine whether the reading is accurate after long-term use. Existing electronic thermometers are not suitable for occasions where precise temperature measurement is required.

[0004] In summary, there is an urgent need to design an electronic thermometer that overcomes the above problems. Summary of the invention

[0005] In view of the above technical problems, the purpose of the present invention is to provide an electronic thermometer and a body temperature measurement method, in which a plurality of electrodes are arranged at corresponding positions of a channel at intervals so that at least some of the electrodes have temperature values ​​corresponding to their positions. After the liquid conductive medium expands, it will connect the circuits where the multiple electrodes are located. By detecting the power-on status of each electrode corresponding to a temperature value at a certain time interval, the expansion state of the liquid conductive medium can be obtained, thereby measuring the corresponding temperature value, and the detection result has high accuracy.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an electronic thermometer, including a temperature sensing element and a conversion module, wherein a accommodating space and a channel are provided in the temperature sensing element, a liquid conductive medium is provided in the accommodating space, the channel is connected with the accommodating space, and the liquid conductive medium can flow into the channel after being heated and expanded; the temperature sensing element also includes a plurality of unconnected electrodes, and the plurality of electrodes are respectively and spaced apart at corresponding positions of the channel, so that at least some of the electrodes have temperature values ​​corresponding to their positions, the liquid conductive medium flows along the channel after expansion, and contacts the electrodes in turn when flowing through the corresponding positions of the electrodes, and the electrodes in contact with the liquid conductive medium generate electrical signals after being energized; the conversion module detects the electrical signals generated by the electrodes corresponding to the temperature values, and converts the electrical signals into the temperature values ​​corresponding to the electrodes.

[0007] In some embodiments, the temperature sensing element includes a bottom sheet and a top sheet, the bottom sheet is provided with the accommodation space and the channel, the accommodation space is located at an end of the bottom sheet, and the channel is a linear fine channel extending along the length direction of the bottom sheet;

[0008] The two ends of the electrode are respectively arranged on the two surfaces of the top sheet, and one end of the electrode can contact the expanded liquid conductive medium.

[0009] In some embodiments, a plurality of the electrodes are arranged at intervals to form an electrode layer, and the electrode layer is correspondingly arranged at the bonding position of the top sheet and the bottom sheet;

[0010] The top sheet and the bottom sheet are both made of plastic.

[0011] In some embodiments, the electrode includes a first portion, a second portion, and a third portion, wherein one end of the first portion is connected to the channel and the other end is connected to the second portion, the second portion passes through the top sheet, one end of the third portion is connected to an end of the second portion away from the first portion, and the third portion is relatively located above the first portion;

[0012] Alternatively, one end of the electrode penetrates the top sheet to reach the bottom of the top sheet and communicates with the channel, and the other end is located above the top sheet.

[0013] In some embodiments, the temperature sensing element is flat, and the portion of the temperature sensing element where the accommodation space is located is used to directly contact the subject to be temperature measured; the accommodation space is a circular, curved or spiral pipe.

[0014] In some embodiments, the temperature sensing element is an integral body, the accommodation space and the channel are provided inside the temperature sensing element, and the electrode is inserted into the temperature sensing element and communicated with a corresponding position of the channel.

[0015] In some embodiments, a shell is further included, and the temperature sensing element partially protrudes from the shell, so that the accommodating space is relatively located outside the shell.

[0016] In some embodiments, a battery is further included, wherein the battery is electrically connected to the electrode;

[0017] The electrodes include at least one first electrode and a plurality of second electrodes, wherein the first electrode is close to the accommodation space; and the second electrodes are far away from the accommodation space and have corresponding temperature values;

[0018] One end of the battery is connected to the first electrode, and the other end is connected to a plurality of the second electrodes.

[0019] In some embodiments, a battery is further included, wherein the battery is electrically connected to the electrode;

[0020] The electrodes include a plurality of first electrodes and a plurality of second electrodes, and the first electrodes and the second electrodes are correspondingly arranged on both sides of the channel;

[0021] The battery is correspondingly connected to the first electrode and the second electrode.

[0022] In some embodiments, the conversion module includes a current detection module and a recording module, and the current detection module can detect whether the electrode generates current;

[0023] The recording module can record the temperature value corresponding to each electrode in the power-on state and select the maximum temperature value.

[0024] In some embodiments, the current detection module and the recording module are circuit boards, the temperature sensing element is installed on the circuit board, and a plurality of detection electrodes are provided on the circuit board, and the detection electrodes are correspondingly connected to the electrodes; a battery is provided on the circuit board, and the battery energizes the temperature sensing element through the circuit board.

[0025] In some embodiments, a display screen is further included, which is electrically connected to the circuit board, and the display screen can display the maximum temperature value selected by the recording module;

[0026] It also includes a shell, the shell is provided with a display slot, and the display screen is relatively located in the display slot.

[0027] According to another aspect of the present application, a body temperature measurement method is further provided, which is applied to an electronic thermometer, wherein the electronic thermometer includes a temperature sensing element, wherein the temperature sensing element includes a liquid conductive medium and a fine channel, wherein the liquid conductive medium expands when heated and can flow into the fine channel; a plurality of electrodes are arranged at intervals along the fine channel, and the expansion of the liquid conductive medium can sequentially connect the electrodes;

[0028] The body temperature measurement method includes: when the temperature sensing element is in contact with the user's skin, the electrode is powered on within an interval time, detecting whether the electrode generates an electrical signal, recording the temperature value corresponding to the electrode that generates the electrical signal, outputting the maximum temperature value, and displaying the maximum temperature value on a display screen.

[0029] Compared with the prior art, the electronic thermometer and temperature measurement method provided by the present invention have the following beneficial effects:

[0030] 1. Several electrodes are arranged at corresponding positions of the channel at intervals, so that at least some of the electrodes have temperature values ​​corresponding to their positions. After the liquid conductive medium expands, it connects the circuits where the multiple electrodes are located to form a current. By detecting the power-on status of each electrode corresponding to a temperature value, the expansion state of the liquid conductive medium can be known, thereby obtaining the corresponding temperature value. The detection result is highly accurate and no professional calibration is required after long-term use;

[0031] 2. A plurality of electrodes are arranged at intervals to form an electrode layer, and the top sheet and the bottom sheet are attached and the electrode layer is pressed at the corresponding position of the channel. The thickness of the electrode layer is small enough not to affect the sealing of the bottom sheet and the top sheet. At the same time, the bottom sheet and the top sheet are made of plastic material and are not easy to break;

[0032] 3. The channel is linear, so people do not need to swing the thermometer, but can place the product of the present invention at a relatively low ambient temperature, and utilize the thermal expansion and contraction of the liquid conductive medium to easily realize the return of the liquid conductive medium;

[0033] 4. The temperature sensing element adopts a flat structure, which increases the heating area compared to the cylindrical structure of traditional electronic thermometers and mercury thermometers, is conducive to rapid temperature rise and fall, and reduces the temperature measurement time;

[0034] 5. A display screen is provided on the circuit board. Compared with the traditional mercury thermometer, the electronic thermometer of the present invention realizes electronic monitoring and displays the results through the display screen, which is convenient for people to read. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0036] Figure 1 is an exploded view of an electronic thermometer in a preferred embodiment;

[0037] Figure 2 is a structural diagram of a temperature sensing element in a preferred embodiment;

[0038] Figure 3 is a structural diagram of a negative film in a preferred embodiment;

[0039] Figure 4 is a structural diagram of a top sheet in a preferred embodiment;

[0040] Figure 5 is a cross-sectional view of a top sheet in a preferred embodiment;

[0041] Figure 6 is a cross-sectional view of a temperature sensing element after the top sheet and the bottom sheet are attached to each other in a preferred embodiment;

[0042] Figure 7 It is a cross-sectional view of a temperature sensing element in a modified embodiment.

[0043] Description of Figure Numbers:

[0044] Shell 1, first shell 11, display slot 111, second shell 12, temperature sensing element 2, bottom sheet 21, accommodating space 211, channel 212, top sheet 22, electrode layer 221, first electrode 2211, second electrode 2212, battery 3, circuit board 4, display screen 41. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0046] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0047] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0048] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as the scope of protection of the present invention.

[0050] refer to Figure 1 to Figure 2 The present invention provides an electronic thermometer, including a temperature sensing element 2 and a conversion module. The temperature sensing element 2 is provided with a containing space 211 and a channel 212. The containing space 211 is provided with a liquid conductive medium. The channel 212 is connected with the containing space 211. The liquid conductive medium can flow into the channel 212 after being heated and expanded; the temperature sensing element 2 includes a plurality of unconnected electrodes, and the plurality of electrodes are respectively arranged at corresponding positions of the channel 212 at intervals, so that at least some of the electrodes have temperature values ​​corresponding to their positions. The liquid conductive medium flows along the channel 212 after expansion, and contacts the electrodes in turn when flowing through the corresponding positions of the electrodes. When the electrodes contacting the liquid conductive medium are energized, an electrical signal is generated; the conversion module detects the electrical signal generated by the electrode corresponding to the temperature value, and converts the electrical signal into the temperature value corresponding to the electrode.

[0051] In this embodiment, a number of electrodes are arranged at corresponding positions of the channel 212 at intervals. After each electrode contacts the liquid conductive medium, it is equivalent to connecting the circuit where the electrode is located to form a current. Moreover, at least some electrodes have temperature values ​​corresponding to their positions. By detecting whether there is current in the circuit where the corresponding electrode with the temperature value is located, the expansion state of the liquid conductive medium is known, thereby measuring the corresponding temperature value. The detection result is highly accurate and does not require professional calibration after long-term use, and will not affect the accuracy of the detection result. Among them, the on-off of the circuit corresponding to the electrode is a digital signal, which is more low-power and resistant to interference than analog signals.

[0052] Specifically, the accommodation space 211 is located at one end of the temperature sensing element 2, and the channel 212 is connected to the accommodation space 211 and is arranged in the length direction of the temperature sensing element 2. After the liquid conductive medium expands, it will enter the channel 212 and flow to the end of the temperature sensing element 2 away from the accommodation space 211. During the flow, the liquid conductive medium will contact multiple electrodes and connect the circuits corresponding to the electrodes to generate current. The conversion module detects whether each electrode corresponding to a temperature value on the temperature sensing element 2 is in an energized state, and the position of the liquid conductive medium can be known, thereby obtaining the corresponding temperature value. The position and spacing of each electrode corresponding to a temperature value in the channel 212 are calculated after testing, and each electrode corresponds to a temperature value, for example, the spacing between each electrode corresponds to a temperature difference of 0.1 degrees. The liquid conductive medium is placed in the accommodation space 211. When in use, the end of the temperature sensing element 2 with the accommodation space 211 is brought into contact with the user. The gel can be applied to fit the skin surface or clamped under the armpit. The liquid conductive medium filled in the accommodation space 211 at the end of the temperature sensing element 2 expands due to heat, flows along the channel 212 and contacts multiple electrodes. The circuit where the electrode is located is connected and forms a current, generating an electrical signal. This electrical signal includes both a current signal and a voltage signal. The conversion module then converts the electrical signal state of the electrode into a temperature value, while the circuit where the electrode is not in contact is still in a disconnected state and there is no current. The channel 212 is a fine pipe, and a number of electrodes are arranged at intervals on the side wall of the channel 212. If the circuit where the electrode is located is in an energized state, it means that the temperature of the liquid conductive medium is greater than or equal to the temperature value corresponding to the electrode. If the circuit where the electrode is located is in a disconnected state, it means that the temperature of the liquid conductive medium is less than the temperature value corresponding to the electrode. The electronic thermometer of the present invention records the maximum temperature value corresponding to the electrode that is farthest from the accommodating space 211 and is in a powered state. When the temperature value changes by less than 0.1 degrees within a certain time interval, it is considered that the temperature value corresponding to the electrode is the maximum temperature of the liquid conductive medium. The maximum temperature is close to the user's real body temperature. This maximum temperature value is the current human body temperature.

[0053] It is worth noting that the electronic thermometer of the present invention utilizes the principle of thermal expansion and contraction of liquid conductive medium. One end of a plurality of electrodes extends into the channel 212 to contact with the liquid conductive medium, and the other end extends out of the temperature sensing housing 1 to form a circuit. The liquid conductive medium contacts the electrode to connect the circuit where the electrode is located. The expansion degree of the liquid conductive medium is detected by detecting whether each electrode corresponding to a temperature value is in a powered state, thereby obtaining the temperature value corresponding to the electrode in the powered state, and displaying the maximum temperature value. The accuracy of the components and circuits based on such digital signals is only related to the fixed expansion coefficient of the liquid conductive medium, the cross-sectional area of ​​the micro-pipeline, the smoothness, and the viscosity, and has nothing to do with the circuit design, the aging degree of components, the algorithm, and the voltage, thereby obtaining more accurate results, avoiding the influence of the aging of the temperature sensor, the circuit algorithm deviation, and the battery attenuation on the final result of the traditional electronic thermometer, and no calibration is required. The liquid conductive medium in this embodiment is a thermosensitive material with thermal expansion and contraction characteristics, and can be a thermosensitive gel containing liquid metal and non-metallic materials, a thermosensitive conductive liquid, etc., or a liquid metal material. Further, the liquid metal material includes but is not limited to gallium, gallium indium, gallium indium tin, gallium indium tin zinc, and gallium indium tin zinc silver alloy. The main function of the accommodation space 211 is to store the liquid conductive medium. The present invention does not further limit the shape of the accommodation space 211. The cross-section of the accommodation space 211 includes but is not limited to circular, square, elliptical, etc.

[0054] Further, refer to Figures 2 to 6 The temperature sensing element 2 includes a bottom sheet 21 and a top sheet 22. The bottom sheet 21 is provided with a receiving space 211 and a channel 212. The receiving space 211 is located at the end of the bottom sheet 21. The channel 212 is a linear fine pipe and extends along the length direction of the bottom sheet 21. The two ends of the electrode are respectively arranged on the two sides of the top sheet 22, and one end of the electrode can contact the expanded liquid conductive medium.

[0055] In this embodiment, the temperature sensing element 2 includes a bottom sheet 21 and a top sheet 22, and the top sheet 22 and the bottom sheet 21 are installed in a close fit, which is convenient for manufacturing and installation. At the same time, the channel 212 is a linear fine pipe. People do not need to swing the thermometer, but place the product of the present invention at a relatively low ambient temperature, and the return of the liquid conductive medium can be easily achieved by utilizing the thermal expansion and contraction of the liquid conductive medium. Specifically, the electrode is arranged on the top sheet 22 and one end of the electrode reaches the channel 212 of the bottom sheet 21, and can contact the liquid conductive medium in the channel 212. It is worth noting that the channel 212 includes but is not limited to a linear pipe, and can also be a curved pipe or a spiral pipe, etc. At the same time, the cross-section of the channel 212 is not limited to a circle, and can also be a square, an ellipse, etc. As long as the technical effect of the liquid conductive medium automatically returning to the accommodating space 211 after the liquid conductive medium is cooled is achieved, it is within the scope of protection of the invention.

[0056] Furthermore, a plurality of electrodes are arranged at intervals on the channel 212 to form an electrode layer 221 , and the electrode layer 221 is disposed between the bottom sheet 21 and the top sheet 22 and corresponds to the position of the channel 212 , so that the top sheet 22 and the bottom sheet 21 press the electrode layer 221 at the corresponding position of the channel 212 .

[0057] In this embodiment, the top sheet 22 and the bottom sheet 21 press the electrode layer 221 in the middle of the temperature sensing element 2, so that the electrode layer 221 is not easily misplaced, and the several electrodes on the electrode layer 221 are stably set at the corresponding positions of the channel 212, thereby improving the accuracy of its detection results. Moreover, the thickness of the electrode layer 221 is small enough not to affect the sealing of the bottom sheet 21 and the top sheet 22.

[0058] Specifically, in this embodiment, a mercury-free liquid conductive medium is used, so that the bottom sheet 21 and the top sheet 22 can be made of plastic material, which is not easy to break, or will not cause mercury poisoning after breaking, thereby avoiding the situation that traditional mercury thermometers are fragile and easy to cause mercury poisoning. It is worth noting that the materials of the top sheet 22 and the bottom sheet 21 include but are not limited to plastic materials, and can also be other drop-resistant materials such as silicone.

[0059] In a modified implementation, the temperature sensing element 2 is an integral body, and a receiving space 211 and a channel 212 are provided inside the temperature sensing element 2, and the electrode is inserted into the temperature sensing element 2 and communicated with a corresponding position of the channel 212. The difference from the above embodiment is that the temperature sensing element 2 is an integral body, and the side wall of the channel 212 is provided with an electrode extending out of the sensing element.

[0060] Preferably, reference Figure 5 and Figure 6 The electrode includes a first part, a second part and a third part. One end of the first part is connected to the channel 212, and the other end is connected to the second part. The second part passes through the top sheet 22. One end of the third part is connected to an end of the second part away from the first part. The third part is relatively located above the first part.

[0061] In this embodiment, the electrode is U-shaped, and one end of the first part is relatively located on the side wall of the channel 212, so that the channel 212 connected with the electrode has better sealing. It is worth noting that the electrode of the electrode layer 221 includes but is not limited to U-shaped electrodes, and can also be S-shaped electrodes or L-shaped electrodes, etc., as long as the two ends of the electrode are relatively located on the two sides of the top sheet 22 and one end of the electrode can contact the expanded liquid conductive medium, so that the current can flow from one side of the top sheet 22 to the other side of the top sheet 22.

[0062] In a variant embodiment, reference Figure 7 , one end of the electrode penetrates the top sheet 22 to reach the bottom of the top sheet 22 and communicates with the channel 212, and the other end is located above the top sheet 22. In this modified implementation, the electrode is square, and the electrode is directly inserted into the top sheet 22 and reaches the channel 212.

[0063] Preferably, reference Figure 3 The temperature sensing element 2 is flat, and the portion of the temperature sensing element 2 where the accommodation space 211 is located is used to directly contact the temperature-measured subject; the accommodation space 211 is a circular, curved or spiral pipe.

[0064] In this embodiment, the temperature sensing element 2 is flat compared to the cylindrical structure of traditional electronic thermometers and mercury thermometers, which increases the heating area, facilitates rapid temperature rise and fall, and reduces the temperature measurement time. The accommodating space 211 is a circular, curved or spiral pipe, which can increase the contact area between the corresponding position of the accommodating space 211 and the skin, thereby increasing the heating area of ​​the accommodating space 211.

[0065] It should be noted that in this preferred embodiment, the temperature sensing element 2 is flat, but the end of the temperature sensing element 2 with the accommodating space 211 is not limited to being flat, but may also be elliptical, rectangular, teardrop-shaped, etc.

[0066] Furthermore, it also includes a shell 1 , and the temperature sensing element 2 partially protrudes from the shell 1 , so that the accommodating space 211 is relatively located outside the shell 1 .

[0067] In this embodiment, the temperature sensing element 2 is disposed in the housing 1 and the portion with the accommodation space 211 protrudes from the housing 1 , so that the other portion of the temperature sensing element 2 is placed in the housing 1 , thereby improving the safety protection performance and anti-fall performance of the temperature sensing element 2 .

[0068] Specifically, refer to Figure 1 The housing 1 includes a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 can be assembled to form the entire housing 1, which is convenient for assembling the housing 1. The assembly direction of the first housing 11 and the second housing 12 can be an up-down assembly or a left-right assembly. The specific assembly structure of the first housing 11 and the second housing 12 is not further described in the present invention, and this is a common technical means used by those skilled in the art.

[0069] Further, refer to Figure 4 , and also includes a battery 3, which is electrically connected to the electrodes; the electrodes include at least one first electrode 2211 and a plurality of second electrodes 2212, the first electrode 2211 is close to the accommodating space 211 and corresponds to a temperature value; the second electrode 2212 is far away from the accommodating space 211; one end of the battery 3 is connected to the first electrode 2211, and the other end is connected to the plurality of second electrodes 2212 respectively.

[0070] In this embodiment, a battery 3 is provided in the housing 1, and the battery 3 can energize the electrode. As long as the liquid conductive medium contacts the electrode, the circuit corresponding to the electrode can be connected to generate an electrical signal, which is faster and more convenient to use. Specifically, the first electrode 2211 is close to the accommodating space 211, and the second electrode 2212 is relatively located on the side away from the accommodating space 211; after the liquid conductive medium expands, the liquid conductive medium first flows through the first electrode 2211, and then flows through each second electrode 2212 in turn. When the second electrode 2212 contacts the liquid conductive medium, the circuit corresponding to the second electrode 2212 is connected and a current is formed. The conversion module detects the power-on status of several second electrodes 2212 and obtains the temperature value corresponding to the second electrode 2212 that generates the electrical signal. However, the liquid conductive medium does not contact the second electrode 2212, and the circuit corresponding to the second electrode 2212 is still in a disconnected state.

[0071] It is worth noting that in this embodiment, the first electrode 2211 can be a negative electrode, and the second electrode 2212 is a positive electrode. The battery 3 is connected to the negative electrode and the positive electrode respectively, and the liquid conductive medium contacts the negative electrode and the positive electrode at the same time, which can connect the circuits corresponding to the positive electrode and the negative electrode and generate current. At this time, the first electrode 2211 does not correspond to a temperature value, but all the second electrodes 2212 correspond to temperature values. At the same time, the first electrode 2211 can also be a positive electrode, and the second electrode 2212 is a negative electrode. At the same time, a detachable external battery can also be provided on the housing 1 to facilitate the replacement of the external battery and increase the use time of the thermometer.

[0072] In a modified embodiment, the electrodes include a plurality of first electrodes 2211 and a plurality of second electrodes 2212 , and the first electrodes 2211 and the second electrodes 2212 are correspondingly arranged on both sides of the channel 212 ; and the battery 3 is correspondingly connected to the first electrodes 2211 and the second electrodes 2212 .

[0073] In this embodiment, the first electrode 2211 and the second electrode 2212 are correspondingly arranged on both sides of the channel 212. After the liquid conductive medium expands, the liquid conductive medium flows through the first electrode 2211 and the second electrode 2212 at the same time. When the first electrode 2211 and the second electrode 2212 are in contact with the liquid conductive medium, the battery 3 and the first electrode 2211 and the second electrode 2212 are connected to form a circuit and generate current. When the liquid conductive medium leaves the first electrode 2211 and the second electrode 2212, the circuit corresponding to the first electrode 2211 and the second electrode 2212 is disconnected. Specifically, the electrode layer 221 is not limited to being arranged on the top sheet 22. In this embodiment, the first electrode 2211 and the second electrode 2212 can be respectively arranged on the bottom sheet 21 and the top sheet 22, and the two poles of the battery 3 are respectively connected to the bottom sheet 21 and the top sheet 22. It is worth noting that in this embodiment, the first electrode 2211 and the second electrode 2212 correspond to each other and have the same temperature value. At this time, all electrodes have corresponding temperature values.

[0074] Furthermore, the conversion module includes a current detection module and a recording module. The current detection module can detect whether the electrode generates current; the recording module can record the temperature value corresponding to each electrode in the power-on state and select the maximum temperature value.

[0075] In this embodiment, the current detection module can detect whether there is electricity in the circuit corresponding to the electrode, and then determine whether the liquid conductive medium flows through the electrode. The recording module can record the temperature value corresponding to each electrode in the power-on state and select the maximum temperature value. If the circuit where the electrode is located is in the power-on state, it means that the temperature of the liquid conductive medium is greater than or equal to the temperature corresponding to the electrode. If the circuit where the electrode is located is in the disconnected state, it means that the temperature of the liquid conductive medium is less than the temperature corresponding to the electrode.

[0076] Specifically, refer to Figure 1 , the current detection module and the recording module are circuit board 4, which has the function of detecting the power-on status of all electrodes on the top sheet 22 and can record the maximum value of its detection results. The temperature sensing element 2 is installed on the circuit board 4, and a number of detection electrodes are provided on the circuit board 4. The detection electrodes are correspondingly connected to the electrodes on the channel 212, and can detect whether the electrode generates an electrical signal. At this time, the temperature sensing element 2 is welded on the circuit board 4, and the electrodes on the side of the top sheet 22 away from the bottom sheet 21 are welded one by one with the detection electrodes on the circuit board 4. At the same time, a battery 3 is provided on the circuit board 4, and the battery 3 energizes the temperature sensing element 2 through the circuit board 4. In addition, the circuit board 4 can also be clamped with the shell 1 to improve the structural strength of the electronic thermometer and make it more difficult to separate. Specifically, a clamping portion is provided on the circuit board 4, and a clamping groove is provided on the shell 1. The clamping portion and the clamping groove are fitted with each other to complete the fixed connection between the circuit board 4 and the shell 1.

[0077] It is worth noting that the present invention detects the electrode current signal and records the maximum temperature through the circuit board 4. The circuit board 4 is provided with a plurality of detection electrodes, which correspond to the positions and sizes of the electrodes of the temperature sensing element 2 one by one, and can detect whether each electrode on the temperature sensing element 2 is flowing with current. Of course, the current detection module and the recording module include but are not limited to the circuit board 4, and can also be other detection structures or recording modules. The current detection module and the recording module can also be two separate modules. These are all commonly used technical means by those skilled in the art, so the present invention will not be further elaborated.

[0078] Preferably, it also includes a display screen 41 electrically connected to the circuit board 4 , and the display screen 41 can display the maximum temperature value selected by the recording module; a display slot 111 is provided on the housing 1 , and the display screen 41 is relatively located in the display slot 111 .

[0079] In this embodiment, the display screen 41 is electrically connected to the circuit board 4. Compared with the traditional mercury thermometer, the present invention realizes electronic monitoring and displays the results through the display screen 41, which is convenient for people to read and solves the problem of difficulty in reading traditional thermometers. Specifically, a display slot 111 is provided on the housing 1, and the display screen 41 is relatively located in the display slot 111. The display screen 41 will display the maximum temperature recorded by the circuit board 4. When the temperature change value is less than 0.1 degrees within a certain interval, it is considered that the temperature of the liquid conductive medium is close to the user's real body temperature, and the deviation is less than 0.1 degrees. At this time, the temperature value displayed on the display screen 41 is the current human body temperature. In a modified embodiment, the circuit board 4 partially protrudes from the housing 1, and the display screen 41 is installed on the part of the circuit board 4 protruding from the housing 1. It is worth noting that the thermometer of the present invention can also have functions such as temperature language broadcasting, temperature Bluetooth transmission, and temperature APP display to meet the diversified needs of thermometers.

[0080] The present invention also provides a body temperature measurement method, which is applied to the electronic thermometer in any of the above embodiments, the electronic thermometer includes a temperature sensing element 2, the temperature sensing element 2 includes a liquid conductive medium and a fine channel 212, the liquid conductive medium can flow into the fine channel 212 after being heated and expanded; a plurality of electrodes are arranged at intervals along the fine channel 212, and the expansion of the liquid conductive medium can connect the electrodes in sequence. The body temperature measurement method specifically includes: when the temperature sensing element 2 is in contact with the user's skin, during the interval time, the electrodes are connected to a power source, whether the electrodes generate an electrical signal is detected, the temperature value corresponding to the electrode that generates the electrical signal is recorded, the maximum temperature value is output, and the maximum temperature value is displayed on the display screen 41.

[0081] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An electronic thermometer, characterized in that: include: A temperature sensing element, wherein a storage space and a channel are provided in the temperature sensing element, a liquid conductive medium is provided in the storage space, the channel is connected to the storage space, and the liquid conductive medium can flow into the channel after being heated and expanded; the temperature sensing element also includes a plurality of unconnected electrodes, wherein the plurality of electrodes are respectively and spaced apart at corresponding positions of the channel, so that at least some of the electrodes have temperature values ​​corresponding to their positions, and the liquid conductive medium flows along the channel after expansion, and contacts the electrodes in sequence when flowing through corresponding positions of the electrodes, and generates an electrical signal after the electrodes contacting the liquid conductive medium are energized; The conversion module detects the electrical signal generated by the electrode corresponding to the temperature value and converts the electrical signal into the temperature value corresponding to the electrode.

2. An electronic thermometer according to claim 1, characterized in that: The temperature sensing element comprises a bottom sheet and a top sheet, the bottom sheet is provided with the accommodation space and the channel, the accommodation space is located at the end of the bottom sheet, and the channel is a linear fine pipe extending along the length direction of the bottom sheet; The two ends of the electrode are respectively arranged on the two sides of the top sheet, and one end of the electrode can contact the expanded liquid conductive medium.

3. An electronic thermometer according to claim 2, characterized in that: A plurality of the electrodes are arranged at intervals to form an electrode layer, and the electrode layer is arranged between the bottom sheet and the top sheet and corresponds to the position of the channel; The bottom sheet and the top sheet are made of plastic.

4. An electronic thermometer according to claim 2, characterized in that: The electrode comprises a first part, a second part and a third part, one end of the first part is connected to the channel, and the other end is connected to the second part, the second part passes through the top sheet, one end of the third part is connected to an end of the second part away from the first part, and the third part is relatively located above the first part; Alternatively, one end of the electrode penetrates the top sheet to reach the bottom of the top sheet and communicates with the channel, and the other end is located above the top sheet.

5. The electronic thermometer according to claim 1, characterized in that: The temperature sensing element is flat, and the portion of the temperature sensing element where the accommodation space is located is used to directly contact with the temperature-measured subject; the accommodation space is a circular, curved or spiral pipe.

6. An electronic thermometer according to claim 1, characterized in that: The temperature sensing element is a whole, the accommodation space and the channel are arranged inside the temperature sensing element, and the electrode is inserted into the temperature sensing element and communicated with a corresponding position of the channel.

7. An electronic thermometer according to claim 5, characterized in that: It also includes a shell, and the temperature sensing element partially protrudes from the shell, so that the accommodating space is relatively located outside the shell.

8. An electronic thermometer according to claim 1, characterized in that: Also included is a battery, the battery being electrically connected to the electrode; The electrodes include at least one first electrode and a plurality of second electrodes, wherein the first electrode is close to the accommodation space; the second electrodes are far away from the accommodation space and have corresponding temperature values; One end of the battery is connected to the first electrode, and the other end is connected to a plurality of the second electrodes.

9. An electronic thermometer according to claim 1, characterized in that: Also included is a battery, the battery being electrically connected to the electrode; The electrodes include a plurality of first electrodes and a plurality of second electrodes, and the first electrodes and the second electrodes are correspondingly arranged on both sides of the channel; The battery is correspondingly connected to the first electrode and the second electrode.

10. An electronic thermometer according to claim 8, characterized in that: The conversion module includes a current detection module and a recording module, and the current detection module can detect whether the electrode generates current; The recording module can record the temperature value corresponding to each electrode in the power-on state and select the maximum temperature value.

11. An electronic thermometer according to claim 10, characterized in that: The current detection module and the recording module are circuit boards, the temperature sensing element is mounted on the circuit board, and a plurality of detection electrodes are provided on the circuit board, the detection electrodes are correspondingly connected to the electrodes; a battery is provided on the circuit board, and the battery energizes the temperature sensing element through the circuit board.

12. An electronic thermometer according to claim 11, characterized in that: It also includes a display screen, which is electrically connected to the circuit board, and the display screen can display the maximum temperature value selected by the recording module; It also includes a shell, the shell is provided with a display slot, and the display screen is relatively located in the display slot.

13. A method for measuring body temperature, applied to an electronic thermometer, characterized in that: The electronic thermometer comprises a temperature sensing element, wherein the temperature sensing element comprises a liquid conductive medium and a fine channel, wherein the liquid conductive medium expands when heated and can flow into the fine channel; a plurality of electrodes are arranged at intervals along the fine channel, and the liquid conductive medium expands and can sequentially connect the electrodes; The body temperature measurement method includes: when the temperature sensing element is in contact with the user's skin, the electrode is powered on within an interval time, detecting whether the electrode generates an electrical signal, recording the temperature value corresponding to the electrode that generates the electrical signal, outputting the maximum temperature value, and displaying the maximum temperature value on a display screen.

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