Detection device for heating component

Abstract

The utility model discloses a detection device used for a heating component, the heating component is arranged in an electromagnetic induction type aerosol generation product, and the detection device comprises a pedestal arranged along a horizontal direction; the clamping mechanism is fixed on the base and is used for clamping an aerosol generating product; an included angle is formed between the PCB and the horizontal direction, the PCB and the base are fixed, a detection circuit and a detection coil are arranged on the PCB, the detection circuit is used for sensing an electromagnetic signal of the detection coil, and the electromagnetic signal is used for determining the consistency of the equivalent impedance of the heating component. The detection device provided by the utility model is used for detecting the electromagnetic induction performance of the electromagnetic induction type aerosol generating product.

Description

Technical Field

[0001] This utility model relates to the field of novel tobacco products, and in particular to a detection device for heating components. Background Technology

[0002] Electromagnetic induction heated tobacco products are a new type of tobacco product. Unlike traditional combustion methods, they use electromagnetic induction to precisely control the temperature and heat the tobacco evenly, allowing it to release the desired flavor and nicotine at a lower temperature. This effectively avoids the generation of harmful substances caused by high-temperature combustion, thus reducing potential health risks to users and minimizing secondhand smoke pollution. They are healthier and more environmentally friendly.

[0003] For electromagnetic induction heated tobacco products, the electromagnetic induction characteristics of the heating element directly affect the product's performance and user experience. Changes in the relative position of the heating element and the coil can alter the mutual inductance, thus affecting the electromagnetic induction characteristics. This is particularly true for built-in electromagnetic induction heated tobacco products, where the heating element is located inside the cigarette. Therefore, in addition to manufacturing tolerances, it is also susceptible to external influences such as environmental vibrations during production, transportation, and use. These external factors can cause the position of the heating element relative to the cigarette to shift between different batches, resulting in changes in the relative position of the heating element and the coil, thereby affecting the consistency of heating performance and the smoking experience.

[0004] However, there is currently no suitable testing device that can detect the electromagnetic induction characteristics of heated non-combustible cigarettes with built-in electromagnetic induction. Utility Model Content

[0005] In a first aspect, embodiments of this application provide a detection device for a heating component, the heating component being disposed within an electromagnetic induction-type aerosol generating article, comprising:

[0006] The base is set horizontally.

[0007] A clamping mechanism, fixed to the base, is used to clamp aerosol-generating products;

[0008] The PCB board is set at an angle to the horizontal direction and fixed to the base. The PCB board is equipped with a detection circuit and a detection coil. The detection circuit is used to sense the electromagnetic signal of the detection coil. The electromagnetic signal is used to determine the consistency of the equivalent impedance of the heating component.

[0009] In some embodiments, the system further includes a rotating mechanism and a turntable. The rotating mechanism includes a first housing, in which a drive shaft and a rotating shaft are disposed. The drive shaft is arranged in a horizontal direction and can be driven to rotate. A worm gear is sleeved and fixed on the drive shaft. The rotating shaft is arranged in a vertical direction and a worm wheel is sleeved and fixed on the rotating shaft. The worm gear meshes with the worm wheel. One end of the rotating shaft away from the base is fixed to the turntable. A clamping mechanism is fixed to the turntable.

[0010] In some embodiments, the clamping mechanism includes a second housing, which is fixed to the turntable, and a bidirectional threaded rod is provided inside the second housing. Movable parts are respectively sleeved at both ends of the bidirectional threaded rod. By rotating the bidirectional threaded rod, the movable parts can move relative to each other or move in opposite directions to clamp or release the aerosol generating product.

[0011] In some embodiments, the movable part extends vertically and a clamping part is fixed at the end away from the base. The clamping part has a recess for clamping the aerosol generating article.

[0012] In some embodiments, the device further includes: a telescopic mechanism extending in a vertical direction for adjusting the position of the heating element in the vertical direction, wherein one end of the telescopic mechanism is fixed to the base and the other end of the telescopic mechanism is fixed to the first housing.

[0013] In some embodiments, the detection coil is a planar detection coil, which is fixed to the PCB board by printing.

[0014] In some embodiments, the electromagnetic signal is a voltage signal, and the detection circuit includes a resonant amplifier circuit for determining the AC voltage amplified signal of the detection coil. The AC voltage amplified signal is used to determine the consistency of the equivalent impedance of the heating element. The resonant amplifier circuit includes a first inductor, a first resistor, and a first capacitor, wherein the first inductor and the first resistor are derived from the connected detection coil.

[0015] In some embodiments, the detection circuit further includes a rectifier circuit, a filter circuit, and / or an analog-to-digital converter unit, wherein the rectifier circuit is used to convert the AC voltage amplified signal into a DC voltage amplified signal, the filter circuit is used to filter the DC voltage amplified signal, and the analog-to-digital converter unit is used to convert the filtered analog voltage signal into a digital voltage signal, and the digital voltage signal is used to determine the consistency of the equivalent impedance of the heating element.

[0016] In some embodiments, the resonant amplifier circuit includes a series resonant amplifier circuit, which includes an AC voltage, a first inductor, a first resistor, a first capacitor, a second resistor, and an amplifying element. One end of the second resistor is connected to the AC voltage, and the other end of the second resistor is connected to the inverting input terminal of the amplifying element and one end of a detection coil. The other end of the detection coil is connected to the output terminal of the amplifying element through the first capacitor. The non-inverting input terminal of the amplifying element is grounded.

[0017] The resonant amplifier circuit includes a parallel resonant amplifier circuit, which includes an AC voltage, a first inductor, a first resistor, a first capacitor, a second resistor, an amplifying element, and a feedback resistor. The detection coil, the first capacitor, and the feedback resistor are connected in parallel. One end of the second resistor is connected to the AC voltage, and the other end of the second resistor is connected to the inverting input terminal of the amplifying element, one end of the feedback resistor, one end of the first capacitor, and one end of the detection coil. The other end of the detection coil is connected to the output terminal of the amplifying element, and the non-inverting input terminal of the amplifying element is grounded.

[0018] In some embodiments, the detection device satisfies at least one or more of the following conditions:

[0019] The clamping mechanism also includes an operating part, which is located outside the second housing and fixed to the bidirectional threaded rod;

[0020] The rotating mechanism also includes a motor, which is fixed outside the first housing and is used to drive the transmission shaft to rotate;

[0021] The base is provided with support parts on its bottom surface, and the bottom end of the support parts is provided with anti-slip parts;

[0022] The base is equipped with an operation panel for the operator to input commands or output results to the operator.

[0023] Secondly, embodiments of this application provide an operation method for a detection device, comprising:

[0024] After placing the aerosol-generating product into the clamping mechanism, rotate the operating part to clamp the aerosol-generating product.

[0025] Adjust the telescopic mechanism and / or rotation mechanism to maximize the magnetic flux of the heating element and the detection coil located inside the aerosol generating article;

[0026] Input commands into the control panel to determine the electromagnetic signal of the detection coil.

[0027] Thirdly, embodiments of this application provide a method for determining the consistency of the equivalent impedance of a heating component based on the detection device in any of the above embodiments, comprising:

[0028] In the same alternating magnetic field, the detection voltage value of the detection device with the heating component to be tested placed, the standard voltage value of the detection device with the standard heating component placed, and the background voltage value of the detection device without the heating component placed are determined respectively. The detection voltage value, standard voltage value and background voltage value are determined based on the corresponding digital voltage signals.

[0029] Based on the standard voltage value and the background voltage value, determine the standard voltage change rate corresponding to the standard heating element;

[0030] Based on the detected voltage value and the background voltage value, the rate of change of the detected voltage corresponding to the heating component under test is determined;

[0031] Based on the detected voltage change rate and the standard voltage change rate, the voltage sensitivity of the heating component under test is determined. The voltage sensitivity is used to indicate the difference between the electromagnetic induction performance of the heating component under test and that of the standard heating component.

[0032] Determine whether the absolute value of the voltage sensitivity is less than or equal to a preset threshold;

[0033] When the absolute value of the voltage sensitivity is less than or equal to a preset threshold, it is determined that the equivalent impedance of the heating element under test is consistent with that of the standard heating element.

[0034] In some embodiments, the step of determining the voltage sensitivity of the heating component under test based on the detected voltage change rate and the standard voltage change rate includes:

[0035] Based on the rate of change of the detected voltage and the rate of change of the standard voltage, determine the difference in the rate of change between the absolute value of the rate of change of the detected voltage and the absolute value of the rate of change of the standard voltage.

[0036] The voltage sensitivity of the heating component under test is determined by the ratio of the difference in the rate of change to the absolute value of the standard voltage rate of change.

[0037] In some embodiments, the step of determining the standard voltage change rate corresponding to the standard heating element based on the standard voltage value and the background voltage value includes:

[0038] Based on the standard voltage value and the background voltage value, determine the first voltage difference between the absolute value of the standard voltage value and the absolute value of the background voltage value;

[0039] The standard voltage change rate corresponding to the standard heating component is determined based on the ratio of the absolute value of the first voltage difference to the standard voltage value.

[0040] In some embodiments, the step of determining the rate of change of the detection voltage corresponding to the heating component under test based on the detection voltage value and the background voltage value includes:

[0041] Based on the detected voltage value and the background voltage value, a second voltage difference between the absolute value of the detected voltage value and the absolute value of the background voltage value is determined;

[0042] The rate of change of the detection voltage corresponding to the heating component under test is determined based on the ratio of the absolute value of the second voltage difference to the standard voltage value.

[0043] In some embodiments, it also includes:

[0044] If the voltage sensitivity is greater than a preset threshold, it is determined that the equivalent impedance of the heating component under test is not consistent with that of the standard heating component.

[0045] In some embodiments, the preset threshold is 1% to 3%. Attached Figure Description

[0046] Figure 1 A schematic diagram of a detection apparatus provided according to some embodiments of this application is shown. Figure 1 ;

[0047] Figure 2 A schematic diagram of an electromagnetic induction type aerosol generating article provided according to some embodiments of this application is shown;

[0048] Figure 3 A schematic diagram of a detection apparatus provided according to some embodiments of this application is shown. Figure 2 ;

[0049] Figure 4 A cross-sectional view of a rotating mechanism provided according to some embodiments of this application is shown;

[0050] Figure 5 A schematic diagram of a clamping mechanism provided according to some embodiments of this application is shown;

[0051] Figure 6 Flowcharts showing the operation methods of the detection apparatus provided in some embodiments of this application are shown.

[0052] Figure 7 A block diagram showing the detection circuit of a detection device provided in some embodiments of this application is shown;

[0053] Figure 8 This diagram illustrates a series resonant amplifier circuit according to some embodiments of this application;

[0054] Figure 9 This diagram illustrates a parallel resonant amplifier circuit according to some embodiments of this application;

[0055] Figure 10 A flowchart illustrating a method for determining the consistency of the equivalent impedance of a heating element according to some embodiments of this application;

[0056] Figure 11 This document illustrates a flowchart for determining the voltage sensitivity of a heating element under test, according to some embodiments of this application.

[0057] Figure 12 This document illustrates a flowchart illustrating the determination of the standard voltage change rate corresponding to a standard heating element according to some embodiments of this application.

[0058] Figure 13 This document illustrates a flowchart illustrating the determination of the rate of change of the detection voltage corresponding to a heating component under test, according to some embodiments of this application.

[0059] Figure 14 This illustrates a mutual inductive coupling model between a detection coil and a heating element according to some embodiments of this application;

[0060] Figure 15a This invention illustrates a planar spiral detection coil according to some embodiments of the present application;

[0061] Figure 15b This illustrates a planar rectangular detection coil according to some embodiments of this application;

[0062] Figure 15c This invention illustrates a cylindrical solenoid-type detection coil according to some embodiments of the present application;

[0063] Figure 15d This illustration shows a short dipole pair spiral detection coil according to some embodiments of this application. Detailed Implementation

[0064] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0065] 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.

[0066] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0067] 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.

[0068] refer to Figure 1 This application provides a detection device for a heating element located within an electromagnetic induction aerosol generating article (such as...). Figure 2 (As shown), or "built-in electromagnetic induction type aerosol generating product". The detection device includes: a base 100, a clamping mechanism 107, and a PCB board 108. The base 100 is positioned horizontally (e.g., ...). Figure 1 As shown in the X direction, in this embodiment, the cross-section of the base 100 is square. In other embodiments, the base 100 may also be other geometric shapes, which are not specifically limited here.

[0069] The clamping mechanism 107 is fixed to the base 100 and is used to clamp, for example... Figure 2 The aerosol generating article shown. In this embodiment, the aerosol generating article is along the vertical direction (e.g., Figure 1 The aerosol generating article (as shown in the Z direction) is inserted into and held by the clamping mechanism 107. In other embodiments, the aerosol generating article can also be inserted in the horizontal direction (e.g., along the Z direction). Figure 1 The aerosol-generating product is inserted into the clamping mechanism 107 in the X direction shown and is clamped by the clamping mechanism 107. No specific limitation is made here, as long as the clamping mechanism 107 can clamp the aerosol-generating product.

[0070] The PCB board 108 is set at an angle to the horizontal direction and fixed to the base 100. The PCB board 108 is equipped with a detection circuit and a detection coil 103. The detection circuit is used to sense the electromagnetic signal of the detection coil 103. The electromagnetic signal is used to determine the consistency of the equivalent impedance of the heating element. How to determine the consistency of the equivalent impedance of the heating element based on the electromagnetic signal will be described in detail below. In this embodiment, the PCB board 108 is set at an angle to the horizontal direction (e.g., ...). Figure 1 The angle between the PCB board 108 and the horizontal direction (as shown in the X direction) is 90 degrees, meaning the PCB board 108 is positioned perpendicular to the horizontal direction. In other embodiments, the PCB board 108 is perpendicular to the horizontal direction (e.g., the X direction shown in the X direction). Figure 1The included angle (in the X direction shown) can also be less than 90 degrees, and no specific limitation is made here, as long as the detection circuit can sense the electromagnetic signal of the detection coil 103 when the aerosol generating product is held by the clamping mechanism 107.

[0071] It should be noted that the "heating component" can be understood as a component in a built-in electromagnetic induction aerosol generating product that rapidly heats the tobacco matrix or other atomizable materials through eddy current action. The aerosol generating product can be a cigarette-shaped smoking product, including but not limited to tobacco sheets, tobacco particles, shredded tobacco, reconstituted tobacco, and other tobacco products that can be heated by an aerosol generating device to produce an aerosol for the user to inhale. Furthermore, the "heating component" is part of the aerosol generating product; that is, the aerosol generating product includes the "heating component."

[0072] The detection device provided in this application can detect the electromagnetic induction characteristics of built-in electromagnetic induction aerosol generating products, filling the gap in the prior art where there is no suitable device for detecting the electromagnetic induction characteristics of built-in electromagnetic induction aerosol generating products.

[0073] In some embodiments, the detection mechanism further includes a third housing 102 for fixing the PCB board 108. In this embodiment, the third housing 102 is positioned along the vertical direction (e.g., Figure 1 The third housing 102 extends in the Z direction and is disposed on one side of the base 100. Preferably, the third housing 102 has an opening on the side facing the clamping mechanism 107 so that the detection coil 103 on the PCB board 108 is exposed outside the third housing 102.

[0074] In some embodiments, reference Figure 1 The detection device also includes: a rotating mechanism 105 and a turntable 106. Combined with... Figure 3 and Figure 4 As shown, the rotating mechanism 105 includes a first housing 10501, within which a drive shaft 10503 and a rotating shaft 10502 are disposed. The drive shaft 10503 is along the horizontal direction (e.g., Figure 1 The drive shaft 10503 is configured to rotate in the X direction (as shown) and is capable of being driven to do so. A worm gear 10505 is sleeved and fixed to the drive shaft 10503. The rotating shaft 10502 is positioned along the vertical direction (e.g., in the X direction). Figure 1As shown in the Z direction, the rotating shaft 10502 is fitted with and fixed with a worm gear 10504, and the worm 10505 meshes with the worm gear 10504. The end of the rotating shaft 10502 away from the base 100 is fixed to the turntable 106, which is fixed to the clamping mechanism 107. When the drive shaft 10503 is driven to rotate, it drives the worm 10505 to rotate, which in turn drives the worm gear 10504 to rotate through meshing, thereby driving the rotating shaft 10502 and the turntable 106 to rotate. This ultimately achieves circumferential rotation of the clamping mechanism 107, adjusting the position of the heating element within the aerosol-generating product relative to the detection coil 103, maximizing magnetic flux, increasing mutual inductance, and improving the sensitivity of the detection device. For example, when the heating element is as shown... Figure 2 When the sheet-like structure is shown, the plane where the heating component is located can be adjusted to be as parallel as possible to the plane where the detection coil 103 is located by adjusting the rotation mechanism 105. The rotation mechanism 105 may also include a motor 10506, which can be fixed outside the first housing 10501 and is used to drive the drive shaft 10503 to rotate.

[0075] In some embodiments, reference Figure 5 and combined Figure 3 As shown, the clamping mechanism 107 includes a second housing 10701, which is fixed to the turntable 106. The second housing 10701 contains a bidirectional threaded rod 10702, with movable portions 10703 fitted at both ends. By rotating the bidirectional threaded rod 10702, the movable portions 10703 can move relative to or away from each other, thereby clamping or releasing the aerosol-generating product.

[0076] In some embodiments, the second housing 10701 includes a frame with grooves, and the bidirectional threaded rod 10702 is along the horizontal direction (e.g., Figure 5 The movable part 10703 is positioned within the groove in the vertical direction (as shown in the X direction). Figure 5 Extending in the Z direction (as shown), one end of the part near the base 100 is located in the groove, and the other end away from the base 100 is fixed with a clamping part 10704. The clamping part 10704 is provided with a recess 10705. When the movable part 10703 moves relative to the movable part 10703, the recess 10705 provided on the clamping part 10704 can clamp the aerosol generating product.

[0077] In some embodiments, the detection device further includes an operating part 10706, which is located outside the second housing 10701 and fixed to the bidirectional threaded rod 10702. The movable part 10703 has an internal thread adapted to the bidirectional threaded rod 10702. By rotating the operating part 10706, the bidirectional threaded rod 10702 can be rotated, thereby causing the movable part 10703 to move relative to or away from the aerosol-generating article. Exemplarily, an operator can rotate the operating part 10706 clockwise or counterclockwise by hand to cause the movable part 10703 to move relative to or away from the article; alternatively, the operating part 10706 can be driven by a motor to rotate clockwise or counterclockwise, without specific limitation.

[0078] In some embodiments, reference Figure 1 The detection device also includes: a telescopic mechanism 104. The telescopic mechanism 104 extends along the vertical direction (e.g., Figure 1 Extending in the Z direction (as shown), it is used to adjust the position of the heating element in the vertical direction. Combined with... Figure 3 As shown, one end of the telescopic mechanism 104 is fixed to the base 100, and the other end is fixed to the first housing 10501. Exemplarily, the telescopic mechanism 104 can be a telescopic rod with external threads, and the base 100 has a matching internal thread. By rotating the telescopic rod to screw it in or out, it can move closer to or further away from the base 100, thereby adjusting the heating element in the vertical direction (e.g., ...). Figure 1 The position of the heating element (in the Z direction as shown) is such that the center of the heating element and the center of the detection coil 103 are as horizontal as possible. The rotation of the telescopic rod can be achieved manually or by a motor driven by a motor located in the base 100; no specific limitation is made here.

[0079] In some embodiments, the detection coil 103 is a planar detection coil and is fixed to the PCB board 108 by printing. The inventors have discovered that when the position of the heating element changes slightly, the detection circuit can more sensitively sense the electromagnetic signal of the planar detection coil, thus improving the detection sensitivity of the detection device.

[0080] In some embodiments, reference Figure 1 The base 100 has support portions 101 on its bottom surface, and the bottom end of each support portion 101 has an anti-slip portion to improve the stability of the detection device. In this embodiment, there are four support portions 101, which are respectively arranged around the base 100.

[0081] In some embodiments, an operation panel 110 is provided on the base 100 for the operator to input commands or output results to the operator. In this embodiment, the operation panel 110 is located on the side of the base 100 away from the third housing 102 to facilitate operator operation. Exemplarily, the input commands may include commands instructing the motor to start or stop, and / or commands instructing the detection circuit to perform detection. The output results may include a judgment result on whether there is consistency between the electromagnetic signal (e.g., voltage signal) of the detection coil 103 and / or the equivalent impedance of the heating element.

[0082] refer to Figure 6 The operation method of the detection device may include the following steps:

[0083] Step S1: After placing the aerosol generating product into the clamping mechanism 107, rotate the operating part 10706 to clamp the aerosol generating product.

[0084] Step S2: Adjust the telescopic mechanism 104 and / or the rotation mechanism 105 so that the magnetic flux of the heating component and the detection coil 103 disposed in the aerosol generating article exceeds a preset threshold.

[0085] The telescopic mechanism 104 can be manually adjusted or driven by a motor to adjust its position in the vertical direction (e.g., ...). Figure 1 The height (in the Z direction as shown) increases or decreases; the rotating mechanism 105 can be driven by the motor 10506. For example, the operator can input a command through the operation panel 110 to start the motor, thereby rotating the shaft 10502 to drive the turntable 106 and the clamping mechanism 107 holding the aerosol generating article to move circumferentially, so as to adjust the position of the heating component in the aerosol generating article relative to the detection coil 103, maximize the magnetic flux, improve mutual inductance, and improve the detection sensitivity of the detection device. When the clamping mechanism 107 rotates to the desired position, the operator can input a command again through the operation panel 110 to stop the motor. For example, when the heating component is as shown... Figure 2 When the sheet-like structure is shown, the "desired position" can be understood as the position where the plane where the heating component is located is as parallel as possible to the plane where the detection coil 103 is located.

[0086] Step S3: Input a command to the operation panel 110 to determine the electromagnetic signal of the detection coil 103. The electromagnetic signal can be used to determine the consistency of the equivalent impedance of the heating element.

[0087] In some embodiments, the electromagnetic signal is a voltage signal. The detection circuit includes a resonant amplifier circuit 10 for determining the amplified AC voltage signal of the detection coil, which is used to determine the consistency of the equivalent impedance of the heating element. Figure 8 and Figure 9The resonant amplifier circuit 10 includes a first inductor L D First resistor R D And the first capacitor C. The first inductor L D and the first resistor R D The detection coil 103 is connected; in other words, after the detection coil 103 is connected, it can be equivalent to the first inductance L. D and the first resistor R D This forms a resonant circuit with the first capacitor C. Exemplarily, the detection coil 103 can be connected to the circuit through its two terminals, and the voltage across the detection coil 103 can be connected to an oscilloscope via a voltage probe to obtain an amplified AC voltage signal. The amplification circuit based on the resonant topology can amplify the small voltage signal from the detection coil 103, thereby improving the accuracy of the calculation results.

[0088] In some embodiments, reference Figure 8 The resonant amplifier circuit 10 includes a series resonant amplifier circuit 10, and the series resonant amplifier circuit 10 includes an AC voltage U. AC First inductor L D First resistor R D The system consists of a first capacitor C, a second resistor R2, and an amplifying element A. One end of the second resistor R2 is connected to the AC voltage U. AC The second resistor R2 is connected to the inverting input terminal of amplifying element A and one end of the detection coil. The other end of the detection coil is connected to the output terminal of amplifying element A through the first capacitor C. The non-inverting input terminal of amplifying element A is grounded. For example, amplifying element A can be an amplifier (e.g., an operational amplifier).

[0089] In some embodiments, reference Figure 9 The resonant amplifier circuit 10 includes a parallel resonant amplifier circuit, and the parallel resonant amplifier circuit 10 includes an AC voltage U. AC First inductor L D First resistor R D The first capacitor C, the second resistor R2, the amplifying element A, and the feedback resistor R f The components include a detection coil, a first capacitor C, and a feedback resistor R. f They are connected in parallel, and one end of the second resistor R2 is connected to the AC voltage U. AC The other end of the second resistor R2 is connected to the inverting input terminal of the amplifying element A and the feedback resistor R. f One end of the capacitor is connected to one end of the first capacitor C, and one end of the detection coil. The other end of the detection coil is connected to the output terminal of the amplifying element A, and the non-inverting input terminal of the amplifying element A is grounded. For example, the amplifying element A can be an amplifier (e.g., an operational amplifier). This is achieved by setting the feedback resistor R... fThis method feeds a portion of the amplifier's output signal back to the amplifier's inverting input, creating a negative feedback loop within the amplifier. This stabilizes the amplifier's gain, prevents the amplifier from operating in the saturation or nonlinear region, and improves the circuit's operational stability.

[0090] In some embodiments, reference Figure 8 and Figure 9 The resonant amplifier circuit 10 also includes a diode D. e Third resistor R e Second capacitor C e Among them, diode D e The positive terminal of diode D is connected to the output terminal of amplifying element A. e The negative terminal and the third resistor R e One end, the second capacitor C e One end is connected to the third resistor R. e With the second capacitor C e Parallel connection, third resistor R e The other end, the second capacitor C e The other end is grounded. Because diode D e It has unidirectional conduction, preventing signal reverse transmission and avoiding interference to the amplifier and subsequent circuits. Secondly, a third resistor R is connected in parallel. e With the second capacitor C e This ensures that the amplifier can operate normally and stably.

[0091] The above two resonant amplifier circuits 10 (such as Figure 8 The series resonant amplifier circuit 10 shown and Figure 9 The parallel resonant amplifier circuit 10 shown can determine the consistency of the equivalent impedance of the heating component by the change in the voltage amplified signal. The difference is that when the circuit is adjusted to the resonant condition, the total impedance of the series resonant amplifier circuit reaches its minimum value at the resonant frequency, so the current through the circuit reaches its maximum value at resonance; the total impedance of the parallel resonant amplifier circuit reaches its maximum value at the resonant frequency, so the current through the circuit reaches its minimum value at resonance.

[0092] Series resonant amplifier circuits are highly sensitive to impedance changes and can effectively reflect minute impedance differences in heating components, making them more suitable for precision testing of heating components with high performance requirements. For even higher testing accuracy (such as determining minute differences), a series resonant amplifier circuit is preferred.

[0093] Parallel resonant amplifier circuits offer more stable response to signal amplitude and stronger anti-interference performance, making them suitable for batch testing and complex testing environments. If the testing environment is complex (e.g., with strong interference signals), a parallel resonant amplifier circuit is preferable.

[0094] It should be noted that although this application only shows embodiments of series resonant amplifier circuits and parallel resonant amplifier circuits, those skilled in the art will understand that other composite resonant circuits can also be used to achieve this.

[0095] In some embodiments, the AC voltage is provided by an AC voltage source chip. Specifically, the AC voltage source chip may be a chip of model AD9851BRSZRL. It is a Direct Digital Synthesizer (DDS) chip manufactured by Analog Devices, Inc. (ADI), which is powerful and highly integrated, and can generate high-precision sine wave signals.

[0096] In some embodiments, the detection circuit further includes a rectifier circuit 20, a filter circuit 30, and / or a digital-to-analog converter unit 40. (See reference) Figure 7 In this embodiment, the detection circuit further includes a rectifier circuit 20, a filter circuit 30, and a digital-to-analog converter unit 40. The rectifier circuit 20 converts the AC voltage amplified signal into a DC voltage amplified signal. The filter circuit 30 filters the DC voltage amplified signal, making the filtered signal purer and more stable, providing a reliable data foundation for subsequent data analysis and processing. By setting up the rectifier circuit 20 and the filter circuit 30, the voltage amplified signal is conditioned into a weak electrical signal for processor processing, thereby further improving the accuracy of the processing results. The digital-to-analog converter unit 40 converts the filtered analog voltage signal into a digital voltage signal, which is used to determine the consistency of the equivalent impedance of the heating component.

[0097] The following describes in detail how to determine the consistency of the equivalent impedance of a heating element based on a digital voltage signal. (Reference) Figure 10 The method includes the following steps:

[0098] Step S11: Determine the detection voltage U of the detection device under the condition that the heating component to be tested is placed in the same alternating magnetic field. eq_exam The standard voltage value U of the detection device under the placement of the standard heating element eq_std And the background voltage value U of the detection device without the heating element. D Among them, the detection voltage value U eq_exam Standard voltage value U eq_std and background voltage value U D Determined based on the corresponding digital voltage signals;

[0099] Step S12, based on the standard voltage value U eq_std and background voltage value U DDetermine the standard voltage change rate δ corresponding to the standard heating element. std ;

[0100] Step S13: Based on the detected voltage value and the background voltage value, determine the rate of change of the detected voltage δ corresponding to the heating component under test. exam ;

[0101] Step S14, based on the detected voltage change rate δ exam and standard voltage change rate δ std The voltage sensitivity S corresponding to the heating element under test is determined. The voltage sensitivity S indicates the difference between the electromagnetic induction performance of the heating element under test and that of a standard heating element.

[0102] Step S15: Determine whether the absolute value of the voltage sensitivity S is less than or equal to a preset threshold.

[0103] If the absolute value of the voltage sensitivity S is less than or equal to the preset threshold, step S16 is executed to determine that the equivalent impedance of the heating component under test is consistent with that of the standard heating component.

[0104] It should be noted that "standard heating element" can be understood as a heating element that, under given conditions of heating coil, heating power, and heating frequency, exhibits consistent induced eddy currents, resulting in consistent temperature rise, and meets the design requirements of an aerosol generation system. "Consistency of equivalent impedance of heating elements" can be understood as heating elements from the same or different batches exhibiting consistent or nearly consistent temperature rise within the same timeframe, providing users with the same or minimally different suction experience. This avoids inconsistencies in suction experience caused by differences in the equivalent impedance of the heating elements.

[0105] In some embodiments, the detected voltage value U eq_exam Standard voltage value U eq_std and background voltage value U D It can be the voltage amplitude; in other embodiments, the detected voltage value U eq_exam Standard voltage value U eq_std and background voltage value U D It can also be the effective value of the voltage.

[0106] According to the method for determining the consistency of the equivalent impedance of a heating component in this application, the heating component and the detection coil are treated as a whole, and the impedance change of the whole is converted into a voltage change. The voltage sensitivity S corresponding to the heating component under test is calculated and its absolute value is compared with a preset threshold to determine the consistency of the equivalent impedance of the heating component. This provides a detection method for the electromagnetic induction performance of an electromagnetic induction aerosol generation system. In addition, this application calculates the voltage sensitivity S of the heating component under test based on the voltage change rate corresponding to the heating component under test and the standard heating component, rather than directly based on the voltage difference. This amplifies small voltage changes and improves the accuracy of voltage sensitivity.

[0107] In some embodiments, reference Figure 11 Step S14, based on the detected voltage change rate δ exam and standard voltage change rate δ std Determining the voltage sensitivity S corresponding to the heating component under test can include the following steps:

[0108] Step S141, based on the detected voltage change rate δ exam and standard voltage change rate δ std The difference between the absolute value of the rate of change of the detected voltage and the absolute value of the rate of change of the standard voltage is determined.

[0109] Step S142, based on the difference in rate of change and the standard voltage change rate δ std The ratio of the absolute values ​​of the values ​​is used to determine the voltage sensitivity S corresponding to the heating component under test.

[0110] In other words, the voltage sensitivity S can be expressed as,

[0111]

[0112] In formula (1), S represents the voltage sensitivity corresponding to the heating component under test; δ exam Indicates the rate of change of the detected voltage; δ std This represents the standard voltage change rate.

[0113] In some embodiments, reference Figure 12 Step S12, based on the standard voltage value U eq_std and background voltage value U D Determine the standard voltage change rate δ corresponding to the standard heating element. std It may include the following steps:

[0114] Step S121, based on the standard voltage value U eq_std and background voltage value U D Determine the first voltage difference between the absolute value of the standard voltage and the absolute value of the background voltage.

[0115] Step S122, based on the first voltage difference and the standard voltage value U eq_std The ratio of the absolute values ​​of the values ​​is used to determine the standard voltage change rate δ corresponding to the standard heating element. std .

[0116] In other words, the standard voltage change rate δ std This can be expressed as,

[0117]

[0118] In formula (2), δ std U represents the standard voltage change rate; eq_std Indicates the standard voltage value; U D This indicates the background voltage value.

[0119] In some embodiments, reference Figure 13 Step S13, based on the detected voltage value U eq_exam and background voltage value U D Determine the rate of change δ of the detection voltage corresponding to the heating component under test. exam It may include the following steps:

[0120] Step S131, based on the detected voltage value U eq_exam and background voltage value U D The second voltage difference between the absolute value of the detected voltage and the absolute value of the background voltage is determined.

[0121] Step S132, based on the second voltage difference and the standard voltage value U eq_std The ratio of the absolute values ​​of the values ​​is used to determine the rate of change of the detection voltage δ corresponding to the heated component under test. exam .

[0122] In other words, the rate of change of voltage δ is detected. exam This can be expressed as,

[0123]

[0124] In formula (3), δ exam Indicates the rate of change of the detected voltage; U eq_exam Indicates the detected voltage value; U D This indicates the background voltage value.

[0125] According to formulas (1) to (3), the voltage sensitivity S can also be expressed as:

[0126]

[0127] In formula (4), S represents the voltage sensitivity corresponding to the heating component under test; U eq_exam Indicates the detected voltage value; Ueq_std Indicates the standard voltage value; U D This indicates the background voltage value.

[0128] As can be seen from formula (4), this application can detect the voltage value U eq_exam With standard voltage value U eq_std The difference in voltage sensitivity S indicates the difference in electromagnetic induction performance between the heating element under test and the standard heating element. The smaller the voltage sensitivity S, the smaller the difference between the heating element under test and the standard heating element, i.e., the better the consistency; when the voltage sensitivity S = 0, the heating element under test is the same as the standard heating element.

[0129] In some embodiments, reference Figure 10 The method also includes the following steps:

[0130] If the voltage sensitivity exceeds a preset threshold, step S17 is executed to determine that the equivalent impedance of the heating element under test is not consistent with that of the standard heating element. In other words, the temperature rise of the heating element under test and the standard heating element is inconsistent within the same time period, resulting in different suction experiences for the user.

[0131] In some embodiments, the preset threshold ε can be 1% to 3%. This preset threshold ε can also be understood as the maximum permissible error between the electromagnetic induction performance of the heating element under test and that of a standard heating element. When the voltage sensitivity difference between the heating element under test and the standard heating element is within the range of this preset threshold ε, the heating element under test can be determined to be qualified, meaning that its equivalent impedance is consistent with that of the standard heating element, satisfying the requirement.

[0132] |S|≤ε (5)

[0133] In formula (5), S represents the voltage sensitivity of the heating component to be tested; ε represents the preset threshold.

[0134] To improve the accuracy of voltage sensitivity, the present invention further investigates the influencing factors of voltage sensitivity based on a mutual inductance coupling model.

[0135] The mutual inductive coupling model between the detection coil and the heating element is as follows: Figure 14 As shown. According to Faraday's law of electromagnetic induction, when a block conductor is placed in an alternating magnetic field or moves in a fixed magnetic field, an induced current is generated within the conductor and closes within the conductor. Therefore, the heating element under the eddy current effect can be equivalent to a short-circuit loop current model, and in this case, the heating element can be equivalent to a coil. For example... Figure 8 As shown, L D R represents the self-inductance of the detection coil. D I represents the internal resistance of the detection coil. D L represents the current flowing through the detection coil. H R represents the self-inductance of the heating element.H I represents the internal resistance of the heating element. H M represents the current flowing through the heating element; M represents the mutual inductance between the heating element and the detection coil.

[0136] The induced electromotive force V on the detection coil mD It can be represented as:

[0137] V mD =jωMI H (6)

[0138] In formula (6), V mD The induced electromotive force on the detection coil is represented by j; the imaginary unit is represented by ω; the angular frequency of the alternating voltage is represented by M; and the mutual inductance between the heating element and the detection coil is represented by I. H This indicates the current flowing through the heating element.

[0139] The total voltage V on the detection coil D It can be represented as:

[0140] V D =Z D I D +V mD =Z D I D +jωMI H (7)

[0141] In formula (7), V D Z represents the total voltage across the detection coil. D This indicates the impedance of the detection coil without it in place; I D V represents the current flowing through the detection coil. mD The induced electromotive force on the detection coil is represented by j; the imaginary unit is represented by ω; the angular frequency of the alternating voltage is represented by M; and the mutual inductance between the heating element and the detection coil is represented by I. H This indicates the current flowing through the heating element.

[0142] Induced electromotive force V on the heating element mH It can be represented as:

[0143] V mH =jωMI D (8)

[0144] In formula (8), V mH The induced electromotive force on the heating element is represented by j; the imaginary unit is represented by M; the mutual inductance between the heating element and the detection coil is represented by I. D This represents the current flowing through the detection coil.

[0145] Total voltage V on the heating element H It can be represented as:

[0146] V H =Z H I H +V mH =Z H I H +jωMI D (9)

[0147] Formula (9), V H Z represents the total voltage on the heating element. H Indicates the impedance of the heating element; I H V represents the current flowing through the heating element. mH The induced electromotive force on the heating element is represented by j; the imaginary unit is represented by ω; the angular frequency of the alternating voltage is represented by M; and the mutual inductance between the heating element and the detection coil is represented by I. D This represents the current flowing through the detection coil.

[0148] Since the heating element is equivalent to a short-circuit loop current model, the total voltage V across the heating element is... H =0, that is, formula (9) can be expressed as:

[0149] V H =Z H I H +jωMI D =0,

[0150] Solve for I H ,Right now

[0151]

[0152] Substituting formula (10) into formula (7), we get:

[0153]

[0154] Simplifying, we get:

[0155]

[0156] Divide formula (11) by I D The equivalent impedance Z of the detection coil can be obtained. eq :

[0157]

[0158] Z D =R D +jωL D (13)

[0159] Substituting formula (13) into formula (12) and separating the real and imaginary parts, we get:

[0160]

[0161] The real part coefficient is also the proportionality coefficient of the change in the internal resistance of the detection coil. The imaginary part coefficient is also the proportional coefficient of the change in self-inductance of the detection coil.

[0162] refer to Figure 8 and Figure 9 Due to the virtual short and virtual open characteristics of the amplifier, under AC voltage U AC Under certain conditions, the current flowing through the detection coil is the same whether the heating element is not placed (i.e., before the heating element is placed) or when the heating element is placed (i.e., after the heating element is placed). Therefore, the voltage change of the detection coil before and after the heating element is placed is equal to its impedance change. That is, the rate of change of impedance of the detection coil is equal to the rate of change of voltage δ, which can be expressed as:

[0163]

[0164] in,

[0165] In formula (15), δ represents the rate of change of impedance (or voltage change) of the detection coil; Z eq Z represents the equivalent impedance of the detection coil when the heating element is placed; D Q represents the impedance of the detection coil without the heating element; D β represents the equivalent quality factor of the detection coil; β represents the proportional coefficient of the change in the internal resistance of the detection coil; α represents the proportional coefficient of the change in the self-inductance of the detection coil.

[0166] It can be seen that the impedance change rate (or voltage change rate) δ of the detection coil is related to the mutual inductance M of the heating element to the detection coil. Therefore, the impedance change rate (or voltage change rate) δ of the detection coil can be increased by increasing the mutual inductance M.

[0167] Referring to formula (1), voltage sensitivity In other words, by increasing the mutual inductance M, the impedance change rate (or voltage change rate) δ of the detection coil can be increased, thereby improving the accuracy of the voltage sensitivity S.

[0168] The research also found that designing a reasonable detection coil structure and size can improve the mutual inductance M. In other words, depending on the structure of the heated component being tested, the mutual inductance M can be increased by designing a corresponding detection coil, thereby improving detection accuracy.

[0169] According to the law of electromagnetic induction, the induced current in the heating element is proportional to the strength of the induced magnetic field generated by the detection coil and its component perpendicular to the surface of the heating element. Therefore, increasing the strength of the induced magnetic field and its perpendicular component is the key factor in improving the mutual inductance M. Thus, the detection coil should be optimized in the following ways, including but not limited to: (1) The detection coil adopts a multi-turn spiral structure design to improve the strength of the induced magnetic field. The number of turns and layers of the coil can be adjusted according to the detection accuracy requirements, but it needs to be designed in conjunction with the frequency and inductance value to avoid the resonant frequency being too low; (2) The plane (cross-section) of the detection coil should be as parallel as possible to the plane of the heating element (i.e., the plane with the largest cross-sectional area), while keeping the distance within a small range to increase the perpendicular component of the magnetic field; (3) The design of the detection coil should ensure that its center position is aligned with the center of the heating element, thereby optimizing the distribution of the perpendicular component of the magnetic field; (4) The diameter of the detection coil should match the size of the heating element to ensure that the induced magnetic field can completely cover the surface of the heating element; (5) In the design of a multi-layer spiral detection coil, the spacing between each layer should be minimized to improve the uniformity of the magnetic field and the coupling strength.

[0170] Figures 15a to 15d The following diagram illustrates the structure of a detection coil provided in some embodiments of this application. Figures 15a to 15d Specifically, depending on the structure of the heated component under test, the mutual inductance M can be increased by setting a corresponding detection coil on the detection device, thereby improving the detection accuracy.

[0171] For flat, thin-film, or large-area heating components to be tested, methods such as... Figure 15a The planar spiral detection coil shown ( Figure 15a The difference between the left and right images is the number of turns; both have a planar spiral structure. Planar spiral coils can generate a uniform induced magnetic field within a planar region, with the largest vertical component, making them suitable for covering larger planar areas.

[0172] For heating components with elongated or rectangular cross-sections under test, methods such as... can be used. Figure 15b The planar rectangular detection coil is shown. The induced magnetic field of the planar rectangular coil is mainly concentrated in the long strip region, making it suitable for matching with strip-shaped heating components.

[0173] For heating components with columnar, annular, or axisymmetric structures, the following methods can be used: Figure 15c The cylindrical solenoid-type detection coil shown is suitable for surrounding a cylindrical heating element to generate a strong vertical induced magnetic field, as the axial magnetic field strength of the cylindrical solenoid-type coil is the largest.

[0174] For heating components that are dispersed, have obvious local features, or are small in size (e.g., heating components with local asymmetry or complex geometries), methods such as... Figure 15dThe diagram shows a short dipole pair spiral detection coil. Short dipole pair spiral coils can generate a strong localized magnetic field, making their distribution suitable for use with small, complex geometries, especially for localized detection.

[0175] Table 1 shows the planar spiral detection coil (e.g., ...). Figure 15a As shown) in a series resonant amplifier circuit (such as Figure 8 The parameter design example is shown in the figure.

[0176] Table 1 Planar spiral detection coil (e.g.) Figure 15a As shown) in a series resonant amplifier circuit (such as Figure 8 Parameter design example (shown)

[0177] parameter numerical values <![CDATA[Self-inductance L of the detection coil when the heating component to be measured is not placed D > 10μH <![CDATA[Internal resistance R of the detection coil when the heating component to be measured is not placed D > 3Ω AC excitation source frequency f 3MHz

[0178] It should be noted that the parameters of the detection coil, such as the self-inductance L... D and internal resistance R D The self-inductance L can be determined through a combination of theoretical calculations, simulation analysis, and experimental measurements. Specifically, by utilizing the geometric dimensions and material properties of the detection coil, its self-inductance L is accurately calculated using electromagnetic simulation software. D Simultaneously, based on simulation analysis of the conductor's material resistivity and high-frequency skin effect, the internal resistance R was measured. D In addition, the actual electrical parameters of the detection coil were experimentally measured and verified using an impedance analyzer or LCR meter to ensure the accuracy of the values ​​in Table 1.

[0179] AC voltage (AC excitation source) U AC The selection of frequency f can be determined by the following principles: First, ensure that the excitation frequency matches the operating frequency range of the detection coil and the electromagnetic characteristics of the heating component under test; second, improve the detection sensitivity while avoiding electromagnetic interference and excessive circuit loss caused by excessively high frequency.

[0180] The first capacitor C can be adjusted according to the AC excitation source U. AC The frequency f and the self-inductance L of the detection coil D The resonance matching is determined, and the specific formula can be found below.

[0181]

[0182] In AC voltage (AC excitation source) U AC The frequency f is 3MHz and the self-inductance L of the detection coil D With a capacitance of 10μH, the theoretical calculated value is approximately 177pF. Simultaneously, through simulation optimization and experimental debugging, the final capacitance value used was determined to achieve optimal resonant performance. The second resistor R2 can be adjusted according to the amplification factor of the required resonant amplifier circuit. In some embodiments, diode D...e The LRB521S-40T1G model can be used, with the third capacitor C. e The resistance value is 10kΩ, and the second capacitor C e The capacitance value is 200nF.

[0183] The utility model applicant's research also found that, for induction heating products for smoking devices, the different sizes, materials, and shapes of heating components can be attributed to the different effects of the heating components on the equivalent impedance (including equivalent self-inductance and equivalent internal resistance) of the detection coil; while for induction heating products for cigarettes, in addition to the heating component's own parameters (size, material, shape), the different positions of the heating component relative to the detection coil can also be attributed to the effect of the heating component on the equivalent impedance of the detection coil.

[0184] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A detection device for a heating element, said heating element being disposed within an electromagnetic induction aerosol generating product, characterized in that, include: The base is set horizontally. A clamping mechanism is fixed to the base and is used to clamp the aerosol generating product; A PCB board is set at an angle to the horizontal direction and fixed to the base. The PCB board is provided with a detection circuit and a detection coil. The detection circuit is used to sense the electromagnetic signal of the detection coil. The electromagnetic signal is used to determine the consistency of the equivalent impedance of the heating component.

2. The detection device as described in claim 1, characterized in that, Also includes: A rotating mechanism and a turntable are provided. The rotating mechanism includes a first housing, in which a drive shaft and a rotating shaft are provided. The drive shaft is arranged along the horizontal direction and can be driven to rotate. A worm gear is sleeved and fixed on the drive shaft. The rotating shaft is arranged along the vertical direction and a worm wheel is sleeved and fixed on the rotating shaft. The worm gear meshes with the worm wheel. One end of the rotating shaft away from the base is fixed to the turntable. A clamping mechanism is fixed to the turntable.

3. The detection device as described in claim 2, characterized in that, The clamping mechanism includes a second housing, which is fixed to the turntable. The second housing is provided with a bidirectional threaded rod, and each end of the bidirectional threaded rod is fitted with a movable part. By rotating the bidirectional threaded rod, the movable parts can move relative to each other or move in opposite directions to clamp or release the aerosol generating product.

4. The detection device as described in claim 3, characterized in that, The movable part extends along the vertical direction, and a clamping part is fixed at one end away from the base. The clamping part is provided with a recess for clamping the aerosol generating product.

5. The detection device as described in claim 2, characterized in that, Also includes: A telescopic mechanism extends along the vertical direction to adjust the position of the heating component in the vertical direction, and one end of the telescopic mechanism is fixed to the base, while the other end of the telescopic mechanism is fixed to the first housing.

6. The detection device as described in claim 1, characterized in that, The detection coil is a planar detection coil, which is fixed to the PCB board by printing.

7. The detection device as described in claim 1, characterized in that, The electromagnetic signal is a voltage signal. The detection circuit includes a resonant amplifier circuit for determining the AC voltage amplified signal of the detection coil. The AC voltage amplified signal is used to determine the consistency of the equivalent impedance of the heating component. The resonant amplifier circuit includes a first inductor, a first resistor, and a first capacitor, wherein the first inductor and the first resistor are derived from the connected detection coil.

8. The detection device as described in claim 7, characterized in that, The detection circuit further includes a rectifier circuit, a filter circuit, and / or an analog-to-digital converter unit. The rectifier circuit is used to convert the AC voltage amplified signal into a DC voltage amplified signal. The filter circuit is used to filter the DC voltage amplified signal. The analog-to-digital converter unit is used to convert the filtered analog voltage signal into a digital voltage signal. The digital voltage signal is used to determine the consistency of the equivalent impedance of the heating component.

9. The detection device as described in claim 8, characterized in that, The resonant amplifier circuit includes a series resonant amplifier circuit, which comprises an AC voltage, a first inductor, a first resistor, a first capacitor, a second resistor, and an amplifying element. One end of the second resistor is connected to the AC voltage, and the other end is connected to the inverting input terminal of the amplifying element and one end of the detection coil. The other end of the detection coil is connected to the output terminal of the amplifying element through the first capacitor. The non-inverting input terminal of the amplifying element is grounded. The resonant amplifier circuit includes a parallel resonant amplifier circuit, which includes an AC voltage, a first inductor, a first resistor, a first capacitor, a second resistor, an amplifying element, and a feedback resistor. The detection coil, the first capacitor, and the feedback resistor are connected in parallel. One end of the second resistor is connected to the AC voltage, and the other end is connected to the inverting input terminal of the amplifying element, one end of the feedback resistor, one end of the first capacitor, and one end of the detection coil. The other end of the detection coil is connected to the output terminal of the amplifying element, and the non-inverting input terminal of the amplifying element is grounded.

10. The detection device as described in claim 1, characterized in that, The detection device must satisfy at least one or more of the following conditions: The clamping mechanism also includes an operating part, which is located outside the second housing and fixed to the bidirectional threaded rod; The rotating mechanism also includes a motor, which is fixed outside the first housing and is used to drive the transmission shaft to rotate; The bottom surface of the base is provided with a support part, and the bottom end of the support part is provided with an anti-slip part; The base is equipped with an operation panel for the operator to input commands or output results to the operator.

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