A heating element temperature measurement assembly and system

Abstract

The utility model discloses a kind of heating element temperature measuring assembly and system, temperature measuring system includes, pedestal;Heating element;Fixing mechanism: be set on pedestal, for detachably clamping heating element;Traction mechanism: slidingly installed on pedestal;Temperature measuring mechanism: include thermocouple and data acquisition equipment;Wherein: the temperature measuring end of thermocouple is set on heating element surface, tail of thermocouple and traction mechanism detachably connect;Traction mechanism is configured to apply tension to thermocouple, so that thermocouple and heating element surface form constant pressure contact.

Description

Technical Field

[0001] This utility model relates to the field of heated non-combustible cigarette technology, and in particular to a heating element temperature measuring component and system. Background Technology

[0002] Heated tobacco products, as a new type of tobacco product, are based on the principle of releasing smoke through heating rather than traditional combustion. They mainly consist of a heat source, a tobacco carrier, and a control system. The heat source typically uses heating elements such as heating needles, and the accuracy of its temperature control directly affects the heating effect and smoke quality. As a key component of heated tobacco products, the precise measurement of the heating element's temperature is crucial for product development, quality control, and performance optimization.

[0003] Currently, most heated non-combustible appliances on the market measure the temperature of their heating elements using either contact or non-contact methods. Non-contact temperature measurement primarily relies on infrared thermal imagers to capture the temperature of the heating element. The advantage of this method is that it eliminates the need for direct contact with the heating element, making it relatively simple to operate. However, its accuracy is easily affected by various environmental factors. For example, ambient heat radiation can influence the measurement results of the infrared thermal imager; when the ambient temperature is high or other heat sources are present, the measured temperature may be too high. Furthermore, airflow can interfere with the transmission of infrared heat radiation, causing deviations between the measured value and the actual temperature. These factors make non-contact temperature measurement difficult to meet the requirements of experimental research and development phases that require high-precision temperature data.

[0004] Contact temperature measurement involves directly contacting the thermocouple or other temperature-sensing element with the surface of the heating element to obtain temperature information. Theoretically, this method can provide more accurate surface temperature data. However, in practical applications, to ensure good contact between the thermocouple and the heating element, external pressure is usually applied, such as using clamps to hold the thermocouple wires to the object under test or soldering the wires to the element under test. However, because the heating elements in non-combustible heating devices are generally very small, typically only a few tenths of a millimeter to one millimeter in diameter, traditional contact temperature measurement methods face many challenges. The small size of the heating element results in a limited surface area, making it difficult to provide sufficient space for pasting, soldering, or clamping the thermocouple as it would for larger objects under test. The operation may damage the heating element or even alter its original temperature distribution characteristics. Secondly, using clamps to fix the thermocouple is not only difficult to operate, but it is also difficult to ensure uniform pressure distribution on the heating element, easily leading to poor contact or excessive local pressure.

[0005] In summary, existing temperature measurement methods in the field of heated tobacco products have numerous limitations when measuring the temperature of small heating elements. Whether it's the insufficient accuracy of non-contact temperature measurement due to environmental interference, or the inaccuracies and poor stability of contact temperature measurement caused by the small size of the heating element, limited space, and interference from external objects, these problems severely affect the research on the performance of the heating element and the calibration of temperature profiles. Therefore, there is an urgent need to develop a temperature measurement method that can adapt to the small size of the heating element, achieve zero contact with external objects, and allow for precise control of contact pressure. This would meet the demand for accurate temperature measurement of the heating element during the research and development and production of heated tobacco products, providing a reliable guarantee for product performance improvement and quality control. Utility Model Content

[0006] The purpose of this invention is to provide a temperature measurement system and method for heating elements, which can provide real-time and accurate information on the status of aerosol-generated products.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A temperature measurement system for a heating element includes: a base; a fixing mechanism disposed on the base for detachably fixing the heating element to be measured; a traction mechanism slidably mounted on the base; and a temperature measuring mechanism including a thermocouple and a data acquisition device; wherein: the temperature measuring end of the thermocouple is sleeved on the surface of the heating element, and the anchoring end of the thermocouple is detachably connected to the traction mechanism; the traction mechanism is configured to apply a pulling force to the thermocouple, so that the thermocouple and the surface of the heating element form a constant pressure contact.

[0009] Furthermore, the base is a rigid flat plate structure.

[0010] Furthermore, its geometric configuration is any one of a rectangular plate, an L-shaped plate, a U-shaped plate, or a T-shaped plate.

[0011] Furthermore, the base is fixed to the fixing mechanism and the traction mechanism using at least one of the following fixed connection methods: threaded connection: the base surface is provided with a threaded hole array, which is locked by screws;

[0012] Alternatively, magnetic connection: The base has an embedded array of magnets, which are fixed by magnetic attraction;

[0013] Alternatively, a guide rail and slider connection can be used: a guide rail is provided on the base surface, and the base is fixed by the cooperation of the guide rail and slider.

[0014] Furthermore, the traction mechanism includes a tension detection device for indicating the tension value.

[0015] Furthermore, the traction mechanism also includes: a sliding table, which is linearly movable and mounted on the base;

[0016] The tensile testing device is detachably fixed to the sliding table to indicate the tensile force value; a locking element is used to lock the displacement of the sliding table.

[0017] Furthermore, the temperature measurement system for the heating element also includes a constraint element configured to constrain the anchoring end into an anti-slip closed-loop structure, which is then fitted onto the traction mechanism.

[0018] Furthermore, the constraint includes a main body and an adjustable locking mechanism.

[0019] Furthermore, the main body includes at least two through channels, through which the anchoring end of the thermocouple passes sequentially.

[0020] Furthermore, after folding back, it passes through the second channel again and is pressed together by the adjustable locking mechanism to form an anti-slip closed loop.

[0021] Furthermore, the constraint member is a clamp-shaped structure, with one end containing an elastic self-locking structure and a trigger, and the other end being a free end. During operation, pressing the trigger opens the free end, the anchoring end passes through the free end and is folded back before the trigger is released, and the thermocouple is engaged by the constraint member to form a closed loop.

[0022] Furthermore, the fixing mechanism is also equipped with a scale indicator, the length of which extends parallel to the heating element.

[0023] Furthermore, the fixing mechanism includes: a positioning seat having a positioning groove that matches the contour of the heating element; and a pressing member movably connected to the positioning seat and configured to switch between an open position and a clamping position.

[0024] Furthermore, the positioning seat is connected to the air extraction system. When in the clamping position, the air extraction system is activated and generates negative pressure to adsorb the heating element.

[0025] Furthermore, the positioning seat is connected to a pneumatic system, which activates to clamp the heating element when the device is in the clamping position.

[0026] Furthermore, the pressed component is a flip cover.

[0027] A method for measuring the temperature of a heating element, using any one of the above-mentioned heating element temperature measurement systems, includes the following steps:

[0028] S1: The heating element is clamped and assembled into the fixing mechanism;

[0029] S2: Place the temperature measuring end of the thermocouple onto the surface of the heating element, and connect the anchoring end of the thermocouple to the traction mechanism.

[0030] S3: Adjust the position of the traction mechanism relative to the heating element to apply tension to the thermocouple, so that a constant pressure contact is formed between the temperature measuring end and the surface of the heating element;

[0031] S4: Collect temperature data.

[0032] A temperature measuring assembly includes a thermocouple and a constraint member configured to constrain an anchoring end into an anti-slip closed-loop structure, which is sleeved onto a traction mechanism; the temperature measuring assembly can be applied to a heating element temperature measuring system according to any of the above.

[0033] Specifically, the thermocouple in this patent can be any suitable thermocouple, such as a type K thermocouple, which is a widely used type in thermocouple temperature measurement technology. It consists of two metal wires of different materials: a nickel-chromium alloy (usually used as the positive electrode) and a nickel-silicon alloy (usually used as the negative electrode). These two alloys have good thermoelectric properties, converting temperature changes into a measurable thermoelectric potential. When a temperature difference exists between the two connection points of the thermocouple (the measuring end and the reference end), a thermoelectric potential is generated in the closed circuit, the magnitude of which is proportional to the temperature difference. By measuring this thermoelectric potential and combining it with the corresponding temperature-potential relationship curve or formula, the temperature of the measuring end can be determined. Type K thermocouples have many advantages, making them highly favored in many temperature measurement scenarios. First, they have a wide temperature range, providing reliable temperature measurements from -270℃ to 1372℃, meeting the temperature monitoring needs of most industrial and experimental environments. Second, their thermoelectric potential has good linearity with temperature, making temperature measurement more intuitive and accurate, and facilitating signal processing and data conversion. Furthermore, the K-type thermocouple exhibits excellent stability and repeatability, maintaining stable performance over extended periods of use and yielding consistent results during repeated measurements. This is crucial for ensuring the reliability of temperature measurement data. In the heating element temperature measurement system described in this patent, the measuring end of the K-type thermocouple is designed to be fitted onto the surface of the heating element. The tail end, furthest from the measuring end, passes through a vertical hole constraint, folds back, and then passes through the constraint again before being secured with a nut screw, forming a loop structure. This loop structure is then hooked onto a tension detection device. This fixing method ensures close contact between the thermocouple and the heating element, enabling real-time and accurate capture of changes in the heating element's surface temperature. The other end of the K-type thermocouple is screwed onto a thermocouple data acquisition device for signal transmission and acquisition. This ensures good heat transfer between the thermocouple and the heating element and also accommodates the minute thermal expansion and contraction of the heating element during operation, guaranteeing the stability of the temperature measurement.

[0034] In this patented temperature measurement system, the base, serving as the supporting element for the entire device, is made of aluminum alloy. Aluminum alloy possesses advantages such as high strength, light weight, and good corrosion resistance, providing stable and reliable mechanical support for the temperature measurement system. Specifically, the base is designed with a thickness of 12mm. This thickness, precisely calculated and experimentally verified, ensures both the structural strength of the base, preventing deformation during use and guaranteeing the positional accuracy and stability of the various temperature measurement components mounted on it, while also reducing the overall weight of the temperature measurement system to a certain extent, facilitating installation and transportation. Simultaneously, the base thickness is strictly controlled to not exceed 15mm. This is to allow for flexible integration of the temperature measurement system into existing equipment layouts in space-constrained experimental and production environments, avoiding spatial conflicts with other equipment components due to an excessively thick base. The base surface undergoes a black oxide treatment, a common metal surface treatment process. The black oxide film enhances the wear resistance, corrosion resistance, and oxidation resistance of the base surface, thereby extending its service life. Furthermore, the black oxide film has low reflectivity, reducing potential interference from light reflection in the working environment on temperature measurement operations and equipment operation. Several M6 threaded holes are machined on the surface of the base. These evenly distributed holes are used to securely fix the various components of the temperature measurement system to the base. The M6 ​​threaded holes can be used with common standard fasteners to ensure the installation accuracy and stability of each component. At the same time, the reasonable layout of the threaded holes facilitates the installation, disassembly, and adjustment of components on the base, improving the assembly efficiency and flexibility of the temperature measurement system.

[0035] The fixing mechanism is constructed entirely of bakelite (phenolic plastic), a material known for its excellent insulation and heat resistance. This ensures stable and reliable support and fixation of the heating element during temperature measurement, while also guaranteeing operator safety. The fixing mechanism also features a flip-top design, allowing for convenient placement and fixation of the heating element, simplifying operation and improving the efficiency of temperature measurement. Specifically, the overall thickness of the fixing mechanism is controlled to 10mm. This ensures the mechanism's robustness and durability without adding unnecessary weight and bulk due to excessive thickness, thus facilitating the overall integration and operation of the temperature measurement system.

[0036] The heating element to be tested in this patent is an internal heating element employing resistance heating, where "internal" or "external" refers to the relative position of the heating element with respect to the aerosol-forming matrix during use. The internal heating element can take any suitable form. For example, it can be in the form of heating blades. Optionally, it can be in the form of a sleeve or substrate with different conductive portions, or a resistance metal tube. Preferably, the internal heating element can be one or more heating needles or rods penetrating the center of the aerosol-forming matrix during use. Other alternatives include heating wires or filaments, such as Ni-Cr (nickel-chromium), platinum, tungsten, or alloy wires, or heating plates. Optionally, the internal heating element can be deposited within or on a rigid carrier material. For example, a metal with a defined relationship between temperature and resistivity can be used to form the resistance heating element. The aerosol-generating element can heat the aerosol-forming matrix using the aforementioned heating device to generate aerosols.

[0037] In the field of heated tobacco products, precise temperature control and a high-quality aerosol-forming matrix are key factors for achieving a good smoking experience. Besides the accurate measurement and control of the heating element temperature, the characteristics of the aerosol-forming matrix also significantly impact product performance and user experience. The term "aerosol-forming matrix" refers to a device or matrix that releases volatile compounds upon heating, which can form an aerosol for inhalation by the user. Suitable aerosol-forming matrices may include plant-based materials. Aerosol-forming matrices may include tobacco or tobacco-containing materials containing volatile tobacco flavor compounds that are released from the aerosol-forming matrix upon heating. Alternatively, aerosol-forming matrices may include tobacco-free materials. Aerosol-forming matrices may include homogenized plant-based materials. Aerosol-forming matrices may include at least one aerosol-forming agent. Aerosol-forming matrices may include other additives and ingredients, such as flavorings. In some embodiments, the aerosol-forming matrix comprises a liquid at room temperature. For example, the aerosol-forming matrix may comprise a liquid solution, suspension, dispersion, etc. In some embodiments, the aerosol-forming matrix comprises a solid at room temperature. For example, the aerosol forming matrix may contain tobacco or sugar. Preferably, the aerosol forming matrix contains nicotine. Any suitable aerosol forming matrix can be used with the heating needle of this patent. The aerosol forming matrix is ​​preferably a matrix capable of releasing one or more volatile compounds that can form aerosols. The volatile compounds can be released by heating the aerosol forming matrix. The aerosol forming matrix can be solid or liquid, or include both solid and liquid components. Preferably, the aerosol forming matrix is ​​solid. The aerosol forming matrix may include nicotine. A nicotine-containing aerosol forming matrix may include a nicotine salt matrix. The aerosol forming matrix may include plant-based materials. The aerosol forming matrix may include tobacco, and preferably, the tobacco-containing material contains volatile tobacco flavor compounds that are released from the aerosol forming matrix upon heating. The aerosol forming matrix may include homogenized tobacco material. The homogenized tobacco material can be formed by condensing particulate tobacco. When present, homogenized tobacco material may have an aerosol forming agent content of equal to or greater than 5% by dry weight, and preferably greater than 30% by dry weight. The aerosol forming agent content may be less than about 95% by dry weight. Alternatively or additionally, the aerosol forming matrix may include tobacco-free material. The aerosol forming matrix may include homogenized plant-based material. The aerosol forming matrix may include one or more of the following: powder, granules, pellets, fragments, strips, bands, or sheets, wherein the strips or sheets comprise one or more of the following: herbaceous plant leaves, tobacco leaves, tobacco vein fragments, reconstituted tobacco, homogenized tobacco, extruded tobacco, and expanded tobacco. The aerosol forming matrix may include at least one aerosol forming agent.The aerosol forming agent can be any suitable known compound or mixture of compounds that, in use, promotes the formation of dense and stable aerosols and provides substantial resistance to thermal degradation at the operating temperature of the aerosol generating element. Suitable aerosol forming agents are well known in the art and include, but are not limited to: polyols, such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as mono, di, or triacetic acid esters of glycerol; and fatty acid esters of mono, di, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate. Particularly preferred aerosol forming agents are polyols or mixtures thereof, such as triethylene glycol, 1,3-butanediol, and most preferably glycerol. The aerosol forming matrix may include other additives and ingredients, such as fragrances. The aerosol forming matrix preferably contains nicotine and at least one aerosol forming agent. In a particularly preferred embodiment, the aerosol forming agent is glycerol.

[0038] This patent innovatively proposes a temperature measurement system and method for heating elements. By cleverly utilizing a tensile testing device to precisely control the contact pressure between the thermocouple and the heating needle, it achieves accurate temperature measurement with zero external contact. This fundamentally solves the problems of disordered temperature distribution and heat transfer deviations in heating needles caused by the intervention of external objects such as clamps and solder in traditional contact temperature measurement methods. It ensures the high accuracy and authenticity of the measured surface temperature data of the heating needle, providing solid and reliable data support for heating needle performance evaluation and temperature curve adjustment, thereby ensuring the tobacco heating effect of heated non-combustible cigarettes. Simultaneously, the visualized tensile adjustment function of this patent allows operators to intuitively and conveniently adjust and stabilize the contact pressure between the thermocouple and the heating needle. In actual operation, infrared equipment can be used for auxiliary verification to accurately lock in the appropriate tensile data, thus significantly improving the stability and repeatability of the temperature measurement process. Furthermore, the scale indicator embedded in the heating element support can accurately read the heating position and corresponding temperature of the heating needle in real time, thereby obtaining more detailed and comprehensive temperature distribution data. This feature allows researchers to more accurately control the working status of the heating needle.

[0039] Overall, this temperature measurement system exhibits significant advantages such as simple and compact structure, convenient integration, and easy operation. Its core temperature measurement components—the heating element, thermocouple wire, and tension detection device—achieve a stable equilibrium, thus ensuring accurate and reliable temperature measurement results. Furthermore, the system is small and lightweight, making it easy to install and use in both experimental research environments and production applications, greatly expanding its applicability. Moreover, this system does not require the introduction of additional complex and costly temperature measurement elements or devices; instead, it achieves high-precision temperature measurement by optimizing existing heating needle temperature measurement structures. Attached Figure Description

[0040] The above description of this utility model and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solution.

[0041] Figure 1 This is an exploded view of the structure of the temperature measurement system for the heating element;

[0042] Figure 2 This is a schematic diagram of the thermocouple and the heating element in action;

[0043] Figures 3-6 This is a schematic diagram of the assembly of the heating element temperature measurement system;

[0044] Figure 7 This is a schematic diagram of the working status of the heating element temperature measurement system;

[0045] Figure 8 yes Figure 7 Enlarged view of a specific area;

[0046] Figure 9 This is a schematic diagram of the traction mechanism.

[0047] The reference numerals in the attached figures are explained as follows:

[0048] Base 1

[0049] Sliding platform 2

[0050] Tensile testing device 3

[0051] Data acquisition device 4

[0052] Thermocouple 5

[0053] Heating element 6

[0054] Fixed mechanism 7

[0055] Constraint 8

[0056] Locking component 21

[0057] Joystick 22

[0058] Temperature measuring end 51

[0059] Anchor end 52

[0060] Heating needle 61

[0061] Press-fit part 71

[0062] Scale indicator 72

[0063] Positioning seat 73

[0064] Adjustable locking mechanism 81

[0065] Main body 82

[0066] First channel 82a

[0067] Second channel 82b Detailed Implementation

[0068] The detailed features and advantages of this utility model are described below in specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this utility model and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, those skilled in the art can easily understand the related objectives and advantages of this utility model.

[0069] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0070] In the description of this embodiment, it should be noted that the terms "far" and "near" indicate the orientation or positional relationship with reference to the user's mouth. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0071] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0072] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0073] Heating element temperature measurement system

[0074] Figure 1 This is an exploded view of a heating element temperature measurement system, which includes a base, a heating element, a temperature measurement mechanism, a fixing mechanism, a traction mechanism, and a temperature measurement unit.

[0075] like Figure 1 , Figure 2 As shown, the heating element 6 is the device under test. Optionally, the heating element 6 is a combination of a base and a heating needle 61. Optionally, in addition to the heating needle, any heating element of any shape, such as a heating tube, can be selected for measurement according to actual needs.

[0076] like Figure 1As shown, base 1 is the core support platform of the temperature measurement system, used to support and fix the functional components of the temperature measurement system; preferably, it has a rigid rectangular plate structure. Optionally, the base can be fixed to other components through various fixing methods, such as: threaded hole array fixing: multiple threaded holes are distributed on the surface of the base. These threaded holes can be arranged in a matrix or ring array to adapt to the installation requirements of components with different layouts. The specifications of the threaded holes can be diversified. In addition to M6 threaded holes, threaded holes of different sizes such as M4, M5, and M8 can also be set to meet various fixing requirements. During fixing and assembly, the relevant temperature measuring elements, such as fixing mechanisms and traction mechanisms, are aligned with the corresponding threaded hole positions, and then screws are screwed in to firmly fix the components to the base, ensuring the stability of the entire temperature measurement system during operation; or, the surface of the base can also be fixed magnetically. Any side of the base is provided with a magnetic material layer, which can be a permanent magnet or an electromagnet. When a permanent magnet is used, its magnetism can attract components with ferromagnetic materials, realizing quick installation and disassembly. For example, the bottom of the fixing mechanism can be designed with a ferromagnetic material, which will attract and fix the component when it approaches the base, making it convenient and quick. When using an electromagnet, the attraction and release of the component can be achieved by controlling the on and off of the electromagnet, facilitating automated operation and remote control, and improving the flexibility and operability of the temperature measurement system. Alternatively, a track fixing method can be used: a track structure is provided on the surface or side of the base. The track can be common forms such as dovetail grooves, T-slots, or rectangular grooves. Dovetail groove tracks offer good guidance and self-locking properties. The temperature measurement component can be slidably adjusted along the track direction by engaging with the base with a dovetail tenon structure. Once in the appropriate position, the component is fixed to the track using a locking device such as screws. T-slot tracks are suitable for installing components with T-bolts. By inserting the T-bolt into the T-slot and tightening the nut, the component can be fixed to the base. This fixing method facilitates quick disassembly and reinstallation of the component, making it suitable for temperature measurement scenarios requiring frequent adjustments to the component's position. Rectangular groove track structures are simple in structure and easy to manufacture. They can be used with standard rectangular sliders and clamping mechanisms to fix temperature measuring components of different sizes and shapes, exhibiting strong versatility and adaptability. Alternatively, clamp fixation: various clamps, such as spring clamps, lever clamps, or pneumatic clamps, can be installed on the base for quick fixing and releasing of temperature measuring components. Spring clamps utilize the elastic force of springs to clamp the component onto the base, offering simple operation and suitability for fixing small components. Lever clamps amplify clamping force through the lever principle, providing greater clamping force and suitable for fixing larger and heavier components, while requiring less effort in clamping and releasing. Pneumatic clamps utilize the power of cylinders to achieve clamping and releasing, enabling automated control and improving the automation level of the temperature measuring system. They are suitable for temperature measuring systems requiring frequent component replacement or integration with other automated equipment.

[0077] Optionally, the base 1 of this patent is made of aluminum alloy, which features high strength, light weight, and strong corrosion resistance. Its thickness is designed to be 12 mm, and the surface is treated with black anodizing to enhance wear resistance and oxidation resistance. Furthermore, the base material is not limited to aluminum alloy; other materials can be selected according to actual needs. For example, stainless steel bases have higher strength and better corrosion resistance, making them suitable for temperature measurement systems operating in harsh environments, such as high temperature, high humidity, or locations with corrosive chemicals. Alternatively, cast iron bases offer good shock absorption and stability, effectively reducing vibration during operation and improving measurement accuracy, making them suitable for temperature measurement scenarios with high stability requirements. In addition, composite material bases, such as carbon fiber composites, can be used, which have advantages such as light weight, high strength, and corrosion resistance, making the temperature measurement system lighter, easier to carry, and easier to install. The surface treatment of the base can also be diversified. In addition to black anodizing, powder coating can be applied, and the powder coating layer can be provided in a variety of colors to meet the appearance requirements of different users, while also having good wear resistance, corrosion resistance and insulation properties; or electroplating, such as zinc plating or nickel plating, can enhance the corrosion resistance and surface hardness of the base and extend its service life; in addition, for some temperature measurement scenarios with requirements for the coefficient of friction, special coating treatments, such as Teflon coating, can be applied to the surface of the base to reduce the coefficient of friction of the base surface, making it easier for the components to slide and adjust.

[0078] The overall shape of the base is not limited to a rigid rectangular plate structure. For example, an L-shaped base can be designed, which is suitable for installing the temperature measurement system in a corner or combining it with other equipment, effectively utilizing space; a U-shaped base can house the temperature measurement components inside the U-shape, providing some protection against external impacts or interference; a T-shaped base can be used to vertically connect the temperature measurement system with other equipment, forming a compact integrated system; in addition, a multi-layered base can be designed, with different layers connected and fixed by bolts or pins, and each layer can install different temperature measurement components or auxiliary equipment, achieving functional integration and expansion, and improving the overall performance and adaptability of the temperature measurement system.

[0079] Combination Figure 5 , Figure 7 and Figure 8It can be seen that the fixing mechanism 7 is a clamp installed on the base 1 as a holder for placing the heating element 6. Optionally, the fixing mechanism 7 uses a mechanical interference fit to fix the heating element 6. The fixing mechanism 7 includes a positioning seat 73, on which a positioning groove matching the shape of the heating element 6 is machined. The size of the positioning groove is slightly smaller than the outer diameter or outer contour size of the heating element 6. An openable pressing part 71 is provided above the positioning groove. The pressing part 71 is connected to the fixing mechanism 7 by a hinge and can rotate around the hinge to realize the opening and closing operation. When the heating element 6 is inserted into the positioning groove, since the size of the positioning groove is slightly smaller than the size of the heating element 6, a mechanical interference fit is generated. The friction generated by the interference fit initially fixes the heating element 6. Then, the pressing component 71 is closed, pressing it tightly against the top or side of the heating element 6, further increasing the clamping force and ensuring the stability of the heating element 6 during temperature measurement. Alternatively, a magnet is embedded inside the pressing component 71, which attracts the positioning seat when the pressing component 71 is closed, clamping the heating element and facilitating quick opening and closing of the fixing mechanism, thus improving temperature measurement efficiency. The connection between the pressing component 71 and the positioning seat 73 uses a hinge design to ensure that the pressing component 71 can open and close flexibly. At the same time, a sealing strip can be provided on the edge of the pressing component 71 to prevent external dust and impurities from entering, protecting the heating element and the temperature measurement system. Alternatively, a stainless steel spring sheet can be provided on the side wall of the positioning seat. When the heating element is inserted, the spring sheet locks, clamping the heating element within the fixing mechanism 7. The shape of the spring sheet can be designed as arc-shaped or V-shaped to accommodate heating elements of different shapes and sizes. To improve clamping reliability, anti-slip textures can be added to the inner side of the spring sheet to increase friction and prevent displacement of the heating element during temperature measurement. Alternatively, the positioning seat can employ pneumatic clamping, with the fixing mechanism connected to a pneumatic system, including a cylinder, solenoid valve, and control unit. The piston rod of the cylinder is connected to the clamp, and by controlling the on / off state of the solenoid valve, the piston rod can be extended or retracted to clamp and release the heating element. This clamping method is suitable for automated production lines and can be integrated with automated equipment to improve the automation level of the temperature measurement system. The pneumatic clamp can be designed with symmetrical or multi-point clamping structures to ensure that the heating element is subjected to uniform clamping force in all directions, avoiding deformation or damage to the heating element due to uneven clamping force. Simultaneously, the contact surface of the clamp can be made of soft materials, such as rubber or polyurethane, to protect the surface of the heating element. Alternatively, the positioning seat can use vacuum adsorption to fix the heating element, with vacuum channels inside the fixing mechanism 7 connected to an external vacuum pump via pipes. After the vacuum pump is started, a negative pressure is formed inside the fixing mechanism 7, adsorbing the heating element and achieving fixation. This fixing method is suitable for easily deformable heating elements, such as thin-walled tubes or foils, and can effectively avoid deformation caused by mechanical clamping. To accommodate heating elements of different sizes and shapes, multiple vacuum channels can be set on the positioning seat. By controlling the opening and closing of the valve, a suitable vacuum channel can be selected for adsorption, ensuring that the adsorption force is sufficient and evenly distributed.

[0080] Optionally, the fixing mechanism 7 is made entirely of bakelite (phenolic plastic), which has both good insulation properties and heat resistance stability. A pressing component 71 is designed on the top to securely fix the heating element 6 and prevent it from shifting during temperature measurement. A scale indicator 72 is provided on the side of the fixing mechanism 7, parallel to the heating element. This scale indicator can read the position information of the heating needle in real time, facilitating accurate measurement and analysis of the surface temperature distribution of the heating needle, and allowing operators to adjust the measurement position as needed.

[0081] like Figure 1 , Figure 3 and Figure 9 As shown, the traction mechanism consists of a tension detection device 3 and a sliding table 2. The sliding table 2 is connected to the base 1, and the tension detection device 3 is fixed on the sliding table 2, allowing it to move linearly along the surface of the base 1. The sliding table 2 is equipped with a locking element 21 and a rocker arm 22. Manually cranking the rocker arm 22 can drive the sliding table 2 away from or towards the heating element 6. The tension detection device 3 moves synchronously with the sliding table 2. After reaching the designated position, it is locked by the locking element 21 to maintain a constant tension, ensuring stable contact pressure between the thermocouple and the surface of the heating element, thus achieving accurate temperature measurement. The sliding table 2 supports multiple driving methods, including manual, electric, and pneumatic. Specifically, the sliding table adopts a manual screw-driven sliding table structure, the design and working principle of which are well-known technologies. By manually cranking the rocker arm, the screw drives the sliding table to move horizontally linearly along the guide rail. This process of converting the rocker arm into horizontal movement is a common technical means in the mechanical field. Locking component 21 is a locking handle mechanism that comes standard with the manual lead screw slide. This mechanism locks the slide position through simple mechanical operation, ensuring the stability of the slide during temperature measurement and preventing positional displacement due to external forces or vibrations. Since these components and mechanisms are standard configurations, they will not be described in detail here.

[0082] Alternatively, there are several options for selecting the tensile testing device. For example, a digital tensile gauge: a digital tensile gauge is the preferred option for tensile monitoring, with a range of 20N, capable of accurately measuring and displaying the tensile force value. The digital tensile gauge converts the tensile signal into a digital signal through a built-in sensor and electronic circuitry, and displays it on the screen in real time. Alternatively, a laser micro-displacement meter: a non-contact tensile monitoring solution that infers the tensile force by measuring the deformation of a thermocouple. The laser micro-displacement meter emits a laser beam onto the surface of the thermocouple. When the thermocouple deforms due to the tension of the traction mechanism, the reflection position of the laser beam changes. By detecting the change in the reflection position, the deformation of the thermocouple is calculated, thereby inferring the tensile force value.

[0083] See Figure 2 , Figure 7 and Figure 8The temperature measuring mechanism includes a data acquisition device 4, a thermocouple 5, and a constraint member 8. The constraint member 8 secures the anchoring end of the thermocouple 5 into an anti-slip closed-loop structure and, in conjunction with the traction mechanism, ensures constant pressure contact between the measuring end of the thermocouple 5 and the surface of the heating element 6. The thermocouple 5 is a type K thermocouple, with its measuring end 51 fitted onto the heating needle 61, ensuring full and tight contact with the surface of the heating needle. The anchoring end 52 is fixed by the constraint member 8, forming a closed-loop structure. Optionally, the constraint member 8 can be a single-unit structure; for example, it can be designed as a clamp-like structure, with one end containing a flexible self-locking structure and a trigger, and the other end being a free end. During operation, pressing the trigger opens the free end, allowing the anchoring end 52 of the thermocouple 5 to pass through and fold back. After releasing the trigger, the flexible self-locking structure engages the anchoring end, forming an anti-slip closed loop. The clamp-shaped constraint component facilitates one-handed operation and is suitable for temperature measurement scenarios requiring rapid replacement of thermocouple 5; alternatively, the constraint component 8 can be an elastic sleeve that binds the anchoring end of the thermocouple into a closed-loop structure using elastic force; or the constraint component 8 can be an alloy sleeve: utilizing the shape recovery properties of shape memory alloys, the sleeve automatically tightens the anchoring end after activation, forming a stable closed-loop structure, suitable for temperature-sensitive measurement environments; the constraint component 8 can also be a split structure, using a main body and an adjustable locking mechanism to clamp the anchoring end of the thermocouple. Specifically, the main body has at least two through-holes for thermocouple 5. The anchoring end 52 passes through the first and second channels of the main body in sequence, folds back, and passes through the second channel again. Then, the adjustable locking mechanism presses it together to form an anti-slip closed loop. Optionally, there are several choices for the adjustable locking mechanism. For example, it can be a nut screw: the threaded connection is firm and reliable, suitable for scenarios that require fine adjustment of tension; or a ratchet: a one-way locking mechanism, suitable for quick fixing and releasing of the anchoring end, especially suitable for automated operation; or a shape memory alloy sleeve: utilizing the shape recovery characteristics of shape memory alloy, the sleeve automatically tightens the anchoring end after activation, forming a stable closed-loop structure, suitable for temperature-sensitive temperature measurement environments.

[0084] The design of the constraint component 8 ensures that the thermocouple 5 will not loosen or shift during temperature measurement, thereby guaranteeing the stability and accuracy of the temperature measurement. The data acquisition device 4 is connected to the thermocouple 5 to read temperature data and transmit it to the control center wirelessly or via wired means to achieve real-time monitoring of the heating needle temperature.

[0085] Temperature measurement method for heating elements:

[0086] The method described below is merely one example of various embodiments of the temperature measurement system of this utility model. In practical applications, the specific form, connection method, and operational details of each component can be adjusted according to actual needs and applicable scenarios, but the overall measurement concept remains unchanged, aiming to ensure stable and reliable contact between the thermocouple and the surface of the heating element to achieve accurate temperature measurement. For example, the constraint element is not limited to the variants described in the specification; other mechanical structures that can achieve similar fixing functions should also be considered equivalent alternatives and protected by this patent.

[0087] First, assemble the tensile testing device with the sliding table. Then, fix the sliding table, fixing mechanism, and data acquisition equipment to the base. Next, as follows... Figure 5 As shown, place the heating element into the fixing mechanism 7. Specifically, open the clamping part 71 of the fixing mechanism 7, and place the heating element 6 (such as a combination of the base and heating needle 61) into the inner groove of the fixing mechanism 7, ensuring the heating element 6 is stably positioned. Then close the clamping part 71 to firmly fix the heating element 6 within the fixing mechanism 7, preventing displacement during temperature measurement. Then, begin assembling the thermocouple 5. Figure 8 As shown in the enlarged detail, a K-type thermocouple is selected as the temperature sensing element. The temperature sensing end 51 of thermocouple 5 is fitted onto the heating needle 61, ensuring full and tight contact with the surface of the heating needle. At this point, the operator needs to read the position data on the scale indicator 72 on the side of the fixing mechanism 7 and select the desired heating needle position according to actual needs. By moving thermocouple 5, its temperature sensing end 51 is aligned with the numerical position on the scale indicator 72, thus accurately determining the temperature measurement position. Then, the anchoring end 52 of thermocouple 5 is passed through the body 82 of the constraint member 8, folded back, and passed through the body 82 again. By tightening the nut screw 81 on the constraint member 8, the thermocouple 5 is firmly fixed to the constraint member 8, forming a stable closed-loop structure. This design ensures that the thermocouple 5 will not loosen or shift during temperature measurement, guaranteeing the stability and accuracy of the temperature measurement. The closed-loop result formed by the anchoring end 52 is then hung on the hook of the tensile testing device 3. By rotating the rocker arm 22 of the manual slide table 2, the tension detection device 3 is slowly moved along the surface of the base 1, thereby tightening the thermocouple 5. During this process, the operator needs to closely observe the displayed value of the tension detection device 3. When the tension reaches a suitable value, the locking member 21 on the slide table 2 is locked to maintain a constant tension in the tension detection device 3. At this time, the thermocouple 5 is in full contact with the surface of the heating needle 61 and is not affected by external objects, thus achieving accurate temperature measurement.

[0088] Finally, connect the other end of thermocouple 5 to data acquisition device 4, ensuring a secure and reliable connection. Data acquisition device 4 reads temperature data through thermocouple 5 and transmits the data to the control center wirelessly or via wired connection, enabling real-time monitoring of the heating needle temperature.

[0089] After completing the above assembly steps, press the start switch of the needle-type heating element to begin the heating test. During the heating process, the data acquisition device 4 continuously reads the temperature data of the thermocouple 5 and transmits it to the control center in real time, providing accurate data support for the performance evaluation of the heating element and the adjustment of the temperature curve.

[0090] Industrial applicability:

[0091] This patent innovatively proposes a temperature measurement system and component for a heating element. By cleverly utilizing a tensile testing device to precisely control the contact pressure between the thermocouple and the heating element, it achieves accurate temperature measurement with zero external contact. This fundamentally solves the problems of disordered temperature distribution and heat transfer deviations caused by the intervention of external objects such as clamps and solder in traditional contact temperature measurement methods. It ensures the high accuracy and authenticity of the measured surface temperature data of the heating element, providing solid and reliable data support for heating element performance evaluation and temperature curve adjustment, thereby ensuring the tobacco heating effect of heated non-combustible cigarettes. Simultaneously, the visualized tensile adjustment function of this patent allows operators to intuitively and conveniently adjust and stabilize the contact pressure between the thermocouple and the heating element. In actual operation, infrared equipment can be used for auxiliary verification to accurately lock in the appropriate tensile data, thus significantly improving the stability and repeatability of the temperature measurement process. Furthermore, the scale indicator embedded in the fixing mechanism can accurately read the heating position and corresponding temperature of the heating element in real time, thereby obtaining more detailed and comprehensive temperature distribution data. This feature allows researchers to more accurately control the working status of the heating element.

[0092] Overall, this temperature measurement system exhibits significant advantages such as simple and compact structure, convenient integration, and easy operation. Its core temperature measurement components—the heating element, thermocouple wire, and tensile testing device—achieve a stable equilibrium, thus ensuring accurate and reliable temperature measurement results. Furthermore, the system is small and lightweight, making it easy to install and use in both experimental research environments and production applications, greatly expanding its applicability. Moreover, this system does not require the introduction of additional complex and costly temperature measurement elements or devices; instead, it achieves high-precision temperature measurement by optimizing existing temperature measurement structures.

[0093] The terminology and expressions used herein are for descriptive purposes only, and this invention should not be limited to these terms and expressions. The use of these terms and expressions does not mean the exclusion of any illustrative and descriptive equivalent features (or parts thereof), and it should be recognized that various modifications that may exist should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.

[0094] Similarly, it should be noted that although the present invention has been described with reference to the specific embodiments described above, those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and various equivalent changes or substitutions can be made without departing from the spirit of the present invention. Therefore, any changes or modifications to the above embodiments within the scope of the essential spirit of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A temperature measurement system for a heating element, characterized in that, include: Base; A fixing mechanism, disposed on the base, is used to detachably fix the heating element to be tested; A traction mechanism is slidably mounted on the base; The temperature measuring mechanism includes thermocouples and data acquisition equipment; wherein: The temperature measuring end of the thermocouple is sleeved on the surface of the heating element, and the anchoring end of the thermocouple is detachably connected to the traction mechanism. The traction mechanism is configured to apply a pulling force to the thermocouple, so that the thermocouple and the surface of the heating element form a constant pressure contact.

2. The temperature measurement system for heating elements according to claim 1, characterized in that, The base is a rigid flat plate structure; its geometric configuration is any one of a rectangular flat plate, an L-shaped flat plate, a U-shaped flat plate, or a T-shaped flat plate.

3. The temperature measurement system for heating elements according to claim 1, characterized in that, The base is fixed to the fixing mechanism and the traction mechanism by at least one of the following fixed connection methods: Threaded connection: The base surface is provided with a threaded hole array, which is locked by screws; Magnetic connection: The base has an embedded magnet array, which is fixed by magnetic attraction; Guide rail and slider connection: The base surface is provided with a guide rail, and the guide rail and slider are fixed together.

4. The temperature measurement system for heating elements according to claim 1, characterized in that, The traction mechanism includes: A tensile testing device used to indicate tensile force values.

5. The temperature measurement system for heating elements according to claim 4, characterized in that, The traction mechanism also includes: A sliding table is linearly movable and mounted on the base; a tensile force detection device is detachably fixed to the sliding table for indicating the tensile force value; a locking element is used to lock the displacement of the sliding table.

6. The temperature measurement system for heating elements according to claim 1, characterized in that, The heating element temperature measurement system also includes a constraint member, which is configured to constrain the anchoring end into an anti-slip closed-loop structure and be sleeved onto the traction mechanism.

7. The temperature measurement system for heating elements according to claim 6, characterized in that, The constraint component includes a main body and an adjustable locking mechanism. The main body includes at least two through-holes. The anchoring end of the thermocouple passes through the first and second through-holes in sequence, folds back, and passes through the second through-hole again. The adjustable locking mechanism presses the thermocouple together to form an anti-slip closed loop.

8. The temperature measurement system for heating elements according to claim 7, characterized in that, The constraint member is a clamp-shaped structure, with one end containing an elastic self-locking structure and a trigger, and the other end being a free end. During operation, pressing the trigger opens the free end, the anchoring end passes through the free end and is folded back before the trigger is released, and the thermocouple is engaged by the constraint member to form a closed loop.

9. The temperature measurement system for heating elements according to any one of claims 1-8, characterized in that, The fixing mechanism is also provided with a scale indicator, the length extension direction of which is parallel to the heating element.

10. The temperature measurement system for heating elements according to claim 9, characterized in that, The fixing mechanism includes: The positioning seat is provided with a positioning groove that matches the contour of the heating element; The pressing element, movably connected to the positioning seat, is configured to switch between an open position and a clamping position.

11. The temperature measurement system for heating elements according to claim 10, characterized in that, The positioning seat is connected to the air extraction system. When the clamping position is reached, the air extraction system is activated and generates negative pressure to adsorb the heating element.

12. The temperature measurement system for heating elements according to claim 10, characterized in that, The positioning seat is connected to a pneumatic system, and when in the clamping position, the pneumatic system is activated to clamp the heating element.

13. The temperature measurement system for a heating element according to any one of claims 10-12, characterized in that, The pressed component is a flip cover.

14. A temperature measuring component, characterized in that, The temperature measuring component includes a thermocouple and a constraint member, the constraint member being configured to constrain the anchoring end into an anti-slip closed-loop structure and be sleeved onto the traction mechanism; the temperature measuring component can be applied to the heating element temperature measuring system according to any one of claims 1-13.

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