Aerosol-generating device and state detection method for substrate tape

Abstract

An aerosol-generating device (100) and a state detection method for a substrate tape (123). The aerosol-generating device (100) consists of a main unit housing (111), a medium cartridge (120), a driving assembly (11), a heating assembly and a control circuit (12), wherein a first reel (124), a second reel (125) and a substrate tape (123) which is connected to and wound around the two reels are provided inside the medium cartridge (120); and the substrate tape (123) is provided with first magnetic induction segments (21) and second magnetic induction segments (22), which are alternately spaced. When the first reel (124) and the second reel (125) are driven to rotate, a magnetic induction coil assembly (13) of the heating assembly generates a magnetic field that couples with magnetic fields generated by the first magnetic induction segments (21) and the second magnetic induction segments (22), and generates electrical signals of different magnitudes; and the control circuit (12) samples the electrical signals, determines the motion state of the substrate tape (123) on the basis of the electrical signals, and determines whether the problem of tape breakage or tape jamming occurs; thus, corresponding drive control can be performed on the driving assembly (11) and / or corresponding alarm prompt information can be sent out, thereby realizing state detection of the substrate tape (123), and improving the safety of the aerosol-generating device (100).

Description

Aerosol-generating device and method for detecting state of substrate tape

[0001] The present application claims priority to the Chinese patent application No. 202411342528.7, filed on September 25, 2024 in the China Patent Office and entitled "Aerosol-generating device and method for detecting state of substrate tape", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of aerosol generation, and in particular relates to an aerosol-generating device and a method for detecting the state of a substrate tape. BACKGROUND

[0003] Heated, non-combustion aerosol-generating devices can heat aerosol-generating substrates to generate aerosols, and have the advantages of safety, convenience, health, environmental protection, etc., and thus are increasingly attracting attention and favor.

[0004] With the continuous progress of technology, a special aerosol-generating device has appeared, which includes a medium cartridge and a heating assembly. The medium cartridge is internally provided with a substrate tape and a rotating shaft for conveying the substrate tape. The heating assembly is used to heat the aerosol-generating substrate of the substrate tape.

[0005] Among them, the substrate tape inside the medium cartridge may appear idle rotation or non-rotation during use, i.e., the problem of broken or jammed tape. The broken or jammed substrate tape cannot be effectively heated, cannot effectively generate aerosols, and even causes damage to the device. TECHNICAL PROBLEM

[0006] The purpose of the present application is to provide an aerosol-generating device, aiming to solve the problem of abnormal aerosol generation and device damage caused by broken or jammed tape in traditional medium cartridges. TECHNICAL SOLUTION

[0007] In order to solve the above technical problems, the technical solution adopted by the embodiments of the present application is:

[0008] The first aspect of the embodiments of the present application proposes an aerosol-generating device, comprising:

[0009] A main housing provided with a receiving cavity;

[0010] A medium cartridge detachably arranged in the receiving cavity, a first spool and a second spool are arranged at intervals inside the medium cartridge, a substrate tape is wound on the first spool and the second spool, and the first spool and the second spool are connected by the substrate tape, the substrate tape is heated to generate aerosols, and the substrate tape is provided with first magnetic induction sections and second magnetic induction sections arranged at intervals.

[0011] a driving assembly connected with the first reel and / or the second reel, configured to drive the first reel or the second reel to rotate to drive the substrate tape to move between the first reel and the second reel;

[0012] a heating assembly, comprising a magnetic induction coil assembly arranged in the main housing, the magnetic induction coil assembly being configured to generate a magnetic field according to an enable signal, the magnetic induction coil assembly generating different sizes of electric signals when being coupled with the first magnetic induction section and the second magnetic induction section respectively;

[0013] a control circuit electrically connected with the driving assembly and the heating assembly, configured to output the enable signal, control the driving assembly to rotate, and detect the electric signals generated by the magnetic induction coil assembly to determine the movement state of the substrate tape based on the electric signals.

[0014] Optionally, the control circuit periodically detects the change frequency of the electric signals generated by the magnetic induction coil assembly according to a preset time period, and determines the movement state of the substrate tape based on the change frequency of the electric signals.

[0015] Optionally, the control circuit is specifically configured to:

[0016] output the enable signal to drive the magnetic induction coil assembly to generate a magnetic field and control the driving assembly to rotate;

[0017] detect whether the electric signals change within a threshold time, determine that the substrate tape is faulty when the electric signals do not change, and control the driving assembly to stop rotating, the length of the threshold time being greater than the length of the preset time period; or,

[0018] when the electric signals change within the threshold time, determine whether the change period of the electric signals is within the preset time period, determine that the substrate tape is faulty when the change period of the electric signals exceeds the preset time period, and control the driving assembly to stop rotating;

[0019] when the change period of the electric signals is within the preset time period, determine that the substrate tape is normal, and continue to control the driving assembly to rotate.

[0020] Optionally, the control circuit comprises:

[0021] a current sampling circuit connected with the magnetic induction coil assembly, configured to sample a current signal generated by the magnetic induction coil assembly and convert the current signal into a voltage sampling signal;

[0022] a controller configured to output the enable signal and control the driving assembly to rotate, periodically detect a change frequency of the voltage sampling signal within a preset time period, and determine a motion state of the substrate strip based on the change frequency of the voltage sampling signal.

[0023] Optionally, the substrate strip comprises a strip-shaped substrate and an aerosol generating substrate arranged on the strip-shaped substrate, and the strip-shaped substrate is heatable under a magnetic field generated by the magnetic induction coil assembly.

[0024] The strip-shaped substrate is composed of first magnetic induction segments and second magnetic induction segments alternately, and the magnetic induction coil assembly generates different sizes of electrical signals when magnetically coupled with the first magnetic induction segments and the second magnetic induction segments respectively.

[0025] Optionally, the substrate strip comprises a strip-shaped substrate and an aerosol generating substrate arranged on the strip-shaped substrate.

[0026] The strip-shaped substrate or the aerosol generating substrate is provided with first magnetic induction segments and second magnetic induction segments at intervals, and the magnetic induction coil assembly generates different sizes of electrical signals when magnetically coupled with the first magnetic induction segments or the second magnetic induction segments.

[0027] Optionally, at least one of the cross-sectional area, thickness and material of the first magnetic induction segments and the second magnetic induction segments is different.

[0028] Optionally, the first magnetic induction segments are provided with a first through hole, and the second magnetic induction segments are not provided with a through hole; or,

[0029] The first magnetic induction segments are provided with a first through hole, and the second magnetic induction segments are provided with a second through hole, and the shapes or hole diameters of the first through hole and the second through hole are different.

[0030] Optionally, the first magnetic induction segments are provided with a first array of holes, and the second magnetic induction segments are provided with a second array of holes, and the first array of holes is different from the second array of holes.

[0031] A second aspect of the embodiments of the present application proposes a substrate strip state detection method, applied to the aerosol generating device as described above, and the substrate strip state detection method comprises:

[0032] Turning on, outputting an enable signal to drive the magnetic induction coil assembly to generate a magnetic field and controlling the driving assembly to rotate;

[0033] Detecting whether the electrical signal generated by the magnetic induction coil assembly changes within a threshold time, determining that the substrate strip is faulty when the electrical signal does not change, and controlling the driving assembly to stop rotating; or,

[0034] When the electrical signal changes within the threshold time, it is determined whether the change period of the electrical signal is within a preset time period, and when the change period of the electrical signal exceeds the preset time period, it is determined that the substrate belt is faulty, and the driving assembly is controlled to stop rotating, and the threshold time is longer than the preset time period.

[0035] When the change period of the electrical signal is within the preset time period, it is determined that the substrate belt is normal, and the driving assembly continues to be controlled to rotate. Advantages

[0036] The above aerosol generating device is composed of a main machine shell, a medium box, a driving assembly, a heating assembly and a control circuit. The medium box is internally provided with a first spool, a second spool and a substrate belt wound on the two spools. The substrate belt is provided with first magnetic induction sections and second magnetic induction sections alternately spaced. When the first spool and the second spool are driven to rotate, the magnetic coil assembly of the heating assembly generates a magnetic field and is coupled with the first magnetic induction sections and the second magnetic induction sections to generate electrical signals of different sizes, respectively. The control circuit samples and detects the electrical signals generated by the magnetic coil assembly, determines the motion state of the substrate belt based on the electrical signals, and determines whether the problems of belt breakage or belt jamming occur, so as to control the driving assembly accordingly and / or issue corresponding alarm prompt information, realize the state detection of the substrate belt, reduce invalid heating, and improve the safety of the aerosol generating device.

[0037] It can be understood that the advantages of the above second aspect can be referred to the related description in the above first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0039] Fig. 1 is a first structural schematic diagram of the aerosol generating device provided by the present application;

[0040] Fig. 2 is an exploded view of the aerosol generating device provided by the present application;

[0041] Fig. 3 is an exploded view of the medium box provided by the present application;

[0042] Fig. 4 is a second structural schematic diagram of the aerosol generating device provided by the present application;

[0043] Fig. 5 is a first module schematic diagram of the main machine provided by the present application;

[0044] Fig. 6 is a circuit schematic diagram of a magnetic induction coil assembly according to an embodiment of the present application;

[0045] Fig. 7 is a timing schematic diagram of an electrical signal according to an embodiment of the present application;

[0046] Fig. 8 is a first module schematic diagram of a magnetic induction coil assembly according to an embodiment of the present application;

[0047] Fig. 9 is a first structure schematic diagram of a substrate strip according to an embodiment of the present application;

[0048] Fig. 10 is a second structure schematic diagram of a substrate strip according to an embodiment of the present application;

[0049] Fig. 11 is a third structure schematic diagram of a substrate strip according to an embodiment of the present application;

[0050] Fig. 12 is a fourth structure schematic diagram of a substrate strip according to an embodiment of the present application;

[0051] Fig. 13 is a fifth structure schematic diagram of a substrate strip according to an embodiment of the present application;

[0052] Fig. 14 is a flow schematic diagram of a state detection method of a substrate strip according to an embodiment of the present application.

[0053] In the drawings, various reference numerals are used throughout the figures to reference like structures.

[0054] 100, aerosol-generating device; 110, main machine; 120, medium cartridge; 111, main machine housing; 112, outer cover; 113, accommodating cavity; 11, driving assembly; 115, heating assembly; 116, mounting seat; 121, first housing; 122, second housing; 123, substrate strip; 124, first spool; 125, second spool; 126, filter tip; 127, atomization cavity; 12, control circuit; 13, magnetic induction coil assembly; 14, current sampling circuit; 15, controller; 21, first magnetic induction section; 22, second magnetic induction section; 23, first through hole; 24, second through hole; 25, first array hole; 26, second array hole;

[0055] C1, resonance capacitor; C2, filter capacitor; Req, equivalent resistance; Leq, equivalent inductance; Q1, switch; VCC, positive power supply; V1, first electrical signal; V2, second electrical signal; T1, preset time period; T11, first time point; T12, second time point; T13, third time point. Embodiments of the present application

[0056] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and not to limit the present application.

[0057] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0058] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0059] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0060] A first aspect of the embodiments of the present application proposes an aerosol generating device 100 as shown in FIGS. 1 to 4, which comprises a main machine 110 and a medium cartridge 120. The main machine 110 comprises a main machine shell 111 and an outer cover 112 arranged on the main body. The main machine shell 111 is provided with a receiving cavity 113. The medium cartridge 120 is detachably arranged in the receiving cavity 113. The medium cartridge 120 comprises shell assemblies 121 and 122 and a feeding assembly arranged in the shell assemblies. The feeding assembly comprises a first spool 124 and a second spool 125. The first spool 124 and the second spool 125 are spaced apart and arranged in the medium cartridge 120. The medium cartridge 120 further comprises a substrate strip 123. The substrate strip 123 is wound around the first spool 124 and the second spool 125 and connects the first spool 124 and the second spool 125. The shell assembly has an atomization cavity 127 and a filter 126. The atomization cavity 127 is in communication with the filter 126. The substrate strip 123 can be heated to generate aerosol in the atomization cavity 127. The aerosol generated in the atomization cavity 127 is discharged for the user to smoke.

[0061] The first spool 124 and the second spool 125 are used to transport the substrate tape 123 capable of generating aerosol, so that the substrate tape 123 moves in the medium box 120 to generate aerosol for the user to smoke in the atomization cavity 127.

[0062] The circumferential outside of the first spool 124 is used to wind the substrate tape 123, and the substrate tape 123 can be unwound from the first spool 124 and wound on the circumferential outside of the second spool 125 after the atomization cavity 127, that is, the substrate tape 123 before atomization is unwound from the first spool 124 and is wound by the second spool 125 after atomization.

[0063] Exemplarily, the two ends of the substrate tape 123 are wound on the outer periphery of the first spool 124 and the outer periphery of the second spool 125 respectively, and the rotation of the first spool 124 and the second spool 125 is controlled to drive the substrate tape 123 wound on the first spool 124 to pass through the atomization cavity 127 and be wound on the second spool 125. The rotation direction of the second spool 125 can be clockwise or counterclockwise.

[0064] Wherein, unwinding refers to the process of peeling off the substrate along the radial direction of the roll, causing the outer layer of the substrate and the inner layer of the substrate to peel off. The substrate tape 123 is wound on the circumferential outside of the first spool 124, and the substrate tape 123 can be unwound from the first spool 124, which means that the outer layer of the substrate tape 123 and the inner layer of the substrate tape 123 are peeled off.

[0065] Wherein, winding refers to the method of winding continuous products with a winding drum, a spool, etc. The substrate tape 123 is wound on the circumferential outside of the second spool 125 after the atomization cavity 127, and is wound by the second spool 125, which means that the substrate tape 123 after atomization is wound by the second spool 125, that is, the process of winding into a roll.

[0066] Specifically, the substrate tape 123 is a flexible long strip structure with a certain width and thickness, but the length can be extended and bent according to actual conditions.

[0067] The surface of the substrate tape 123 is coated or internally infiltrated or embedded with an aerosol generating substrate for generating aerosol, and the aerosol generating substrate includes but is not limited to a drug or a material containing nicotine, etc.

[0068] Wherein, the substrate tape 123 is provided with first magnetic induction sections 21 and second magnetic induction sections 22 alternately spaced, the first magnetic induction sections 21 and the second magnetic induction sections 22 are not the same, the first magnetic induction sections 21 and the second magnetic induction sections 22 can generate eddy currents under the action of a magnetic field, and the magnetic field coupling occurs with the component generating the magnetic field.

[0069] Correspondingly, the host 110 further comprises a driving assembly 11 arranged in the host housing 111 and partially extending into the accommodating cavity 113, and connected with the first reel 124 and / or the second reel 125. When the driving assembly 11 rotates, the first reel 124 or the second reel 125 is driven to rotate, so as to drive the substrate tape 123 to move between the first reel 124 and the second reel 125.

[0070] The driving assembly 11 is detachably connected with the shaft centers of the first reel 124 and the second reel 125. When the medium cartridge 120 is installed into the accommodating cavity 113, the driving assembly 11 is coaxially connected with the first reel 124 or the second reel 125, and is driven to rotate by the driving signal, so as to drive the first reel 124 and the second reel 125 to rotate, and drive the substrate tape 123 to rotate.

[0071] The host 110 further comprises a control circuit 12 and a heating assembly connected with each other, which are arranged in the host housing 111. The control circuit 12 is configured to output an enabling signal to the heating assembly. The heating assembly generates heat or generates a magnetic field under the action of the enabling signal.

[0072] The control circuit 12 starts to work under the action of a suction instruction or a touch instruction. On one hand, the control circuit 12 is configured to output a driving signal to control the driving assembly 11 to rotate. On the other hand, the control circuit 12 is configured to output an enabling signal to the heating assembly, so that the heating assembly generates heat or generates a magnetic field.

[0073] In an optional embodiment, as shown in FIG. 5, the heating assembly comprises a magnetic induction coil assembly 13 arranged in the host housing 111. The magnetic induction coil assembly 13 is configured to generate a magnetic field according to the enabling signal. The magnetic induction coil assembly 13 at least partially extends into the atomization cavity 127 and is arranged adjacent to the substrate tape 123.

[0074] As shown in FIG. 6, the magnetic induction coil assembly 13 comprises an LC resonance circuit, which comprises an inductor, a resonance capacitor C1 and a switch Q1. The inductor and the capacitor C1 are connected in parallel, and the parallel connection is connected in series with the switch Q1 at two ends of a power supply circuit. The power supply circuit outputs a positive power supply VCC. The two ends of the power supply circuit can also be connected with a filter capacitor C2. The filter capacitor C2 is configured to filter. The control circuit 12 outputs a PWM signal to the switch Q1, so that the inductor and the capacitor C1 generate resonance and generate a magnetic field. The inductor is at least partially arranged in the atomization cavity 127. The generated magnetic field is emitted to the atomization cavity 127 and heats the magnetic induction section.

[0075] Because the first magnetic induction section 21 and the second magnetic induction section 22 have different structures or shapes, when the substrate tape 123 is driven by the first reel 124 and the second reel 125 to move to the magnetic field position, the first magnetic induction section 21 and the second magnetic induction section 22 generate different sizes of eddy currents under the action of the magnetic field and heat. The aerosol generating substrate on the substrate tape 123 can be heated.

[0076] Meanwhile, the first magnetic induction section 21 and the second magnetic induction section 22 are coupled with the magnetic field generated by the magnetic coil assembly 13, and feedback to make the magnetic coil assembly 13 generate different equivalent inductance Leq and equivalent resistance Req, which will change according to the parameters such as the material, shape and thickness of the magnetic induction section. For example, the first magnetic induction section 21 is coupled to make the magnetic coil assembly 13 generate the first equivalent inductance and the second equivalent resistance when passing through the magnetic field position, and the second magnetic induction section 22 is coupled to make the magnetic coil assembly 13 generate the second equivalent inductance and the second equivalent resistance when passing through the magnetic field position.

[0077] The first equivalent inductance and the first equivalent resistance cause the magnetic coil assembly 13 to generate the first current signal, which is the first electric signal V1, and the second equivalent inductance and the second equivalent resistance cause the magnetic coil assembly 13 to generate the second current signal, which is the second electric signal V2. That is, the magnetic coil assembly 13 generates different electric signals when it is coupled with the magnetic field of the first magnetic induction section 21 and the second magnetic induction section 22.

[0078] The control circuit 12 detects the electric signal generated by the magnetic coil assembly 13, and determines the movement state of the substrate belt 123 based on the electric signal.

[0079] When the first electric signal V1 and the second electric signal V2 do not change according to the preset change mode, it indicates that the substrate belt 123 is broken or jammed. For example, if the control circuit 12 continuously detects the first electric signal V1 or the second electric signal V2, it indicates that the belt is jammed or broken. Or, if the control circuit 12 receives the first electric signal V1 and receives the first electric signal V1 again after a preset period of time, it indicates that the belt is jammed.

[0080] By detecting the electric signal generated by the magnetic coil assembly 13, the movement state of the substrate belt 123 can be determined, and whether the belt is broken or jammed. The control circuit 12 can perform corresponding alarm work or control the driving assembly 11 to stop rotating when the belt is broken or jammed. It can also control the magnetic coil assembly 13 to stop generating a magnetic field, thereby realizing alarm and aerosol generating substrate atomization control, preventing excessive atomization from damaging the aerosol generating device 100, and improving the safety of the device.

[0081] In order to further improve the detection effect of the substrate belt 123 and realize the detection of the substrate belt 123 during the entire use process, the control circuit 12 periodically detects the change frequency of the electric signal generated by the magnetic coil assembly 13 according to a preset time period, and determines the movement state of the substrate belt based on the change frequency of the electric signal.

[0082] For example, when the substrate tape 123 normally passes the magnetic field position of the atomization cavity 127 under the driving of the first reel 124 or the second reel 125, the first electric signal V1 and the second electric signal V2 are generated and changed in turn according to the preset time period T1, for example, as shown in FIG. 7, assuming that the preset time period T1 includes a first time point T11, a second time point T12 and a third time point T13, the first time point T11 to the second time point T12 form a first time period, and the second time point T12 and the second time point T12 form a second time period, at the first time point T11, the first magnetic induction section 21 passes the magnetic field position to generate the first electric signal V1, through the first time period, at the second time point T12, the second magnetic induction section 22 passes the magnetic field position to switch to generate the second electric signal V2, through the second time period, at the third time point, the first magnetic induction section 21 passes the magnetic field position again to switch to generate the first electric signal V1, and the control circuit 12 periodically detects the change frequency of the electric signal generated by the magnetic induction coil assembly 13 according to the preset time period T1, and determines the motion state of the substrate tape 123 based on the change frequency of the electric signal.

[0083] When the first electric signal V1 and the second electric signal V2 do not change according to the time period and / or time point of the preset time period T1, it indicates that the substrate tape 123 is broken or jammed, for example, the control circuit 12 continuously detects the first electric signal V1 or the second electric signal V2, indicating that the tape is jammed or broken, or the control circuit 12 receives the first electric signal V1 after the preset time period after receiving the first electric signal V1, indicating that the tape is jammed.

[0084] By periodically detecting the electric signal generated by the magnetic induction coil assembly 13, the motion state of the substrate tape 123 can be determined, whether the tape is broken or jammed, the control circuit 12 can perform corresponding alarm work or control the driving assembly 11 to stop rotating when the tape is broken or jammed, and can also control the magnetic induction coil assembly 13 to stop generating a magnetic field, thereby realizing alarm and atomization control of the aerosol generating substrate, preventing excessive atomization from damaging the aerosol generating device 100, and improving the safety of the device.

[0085] In an optional embodiment, the control circuit 12 is specifically configured to:

[0086] output an enable signal to drive the magnetic induction coil assembly 13 to generate a magnetic field and control the driving assembly 11 to rotate;

[0087] detect whether the electric signal changes within a threshold time, and determine that the substrate tape 123 is faulty when the electric signal does not change, and control the driving assembly 11 to stop rotating, the length of the threshold time being greater than the length of the preset time period;

[0088] When the electrical signal changes within a threshold time, it is determined whether the change period of the electrical signal is within a preset time period T1, and when the change period of the electrical signal exceeds the preset time period T1, it is determined that the substrate tape 123 is faulty, and the control driving assembly 11 is controlled to stop rotating;

[0089] When the change period of the electrical signal is within the preset time period T1, it is determined that the substrate tape 123 is normal, and the driving assembly 11 is continuously controlled to rotate.

[0090] When it is detected that the medium box 120 is installed into the accommodating cavity 113, the control circuit 12 is started to work, and outputs an enabling signal to drive the magnetic induction coil assembly 13 to generate a magnetic field, and outputs a driving signal to control the driving assembly 11 to work, and the driving assembly 11 drives the first spool 124 or the second spool 125 to rotate, and drives the first magnetic induction section 21 and the second magnetic induction section 22 on the substrate tape 123 to pass through the magnetic field position of the atomization cavity 127 in sequence, the first magnetic induction section 21 and the second magnetic induction section 22 generate eddy current and heat the aerosol generating substrate on the substrate tape 123 to generate aerosol for a user to smoke, and on the other hand, the magnetic induction coil assembly 13 generates the first electrical signal V1 and the second electrical signal V2 respectively by being coupled with the magnetic field.

[0091] The control circuit 12 synchronously and periodically detects the change of the electrical signal, and when the electrical signal does not change within a threshold time, for example, no change of the electrical signal is detected for more than 1s, it indicates that the substrate tape 123 is stuck or broken, or when the first electrical signal V1 is received and no subsequent changed second electrical signal V2 is received after more than a threshold time, it indicates that the substrate tape 123 is broken, at this time, the control circuit 12 determines that the substrate tape 123 is faulty, and controls the driving assembly 11 to stop rotating, so as to prevent the stuck substrate tape 123 from being pulled off or prevent the broken substrate tape 123 from being swung in the medium box 120 to cause damage to the device.

[0092] Or, when it is detected that the electrical signal changes within a threshold time, i.e., the first magnetic induction section 21 and the second magnetic induction section 22 pass through the magnetic field position in sequence, at this time, it is further determined whether the change period of the electrical signal corresponding to each magnetic induction section is within a preset time period T1, i.e., whether the electrical signal switches according to a preset time period, and whether the control circuit 12 receives the corresponding electrical signal within the preset time period T1.

[0093] When the change period of the electric signal exceeds the preset time period T1, it is determined that the substrate tape 123 is faulty, and the control driving assembly 11 is controlled to stop rotating. For example, as shown in FIG. 7, the first electric signal V1 is received at the first time point T11, and then the second electric signal V2 is received after exceeding the second time point T12, or the second electric signal V2 is received at the second time point T12, and then the first electric signal V1 is received after exceeding the third time point T13, which indicates that the substrate tape 123 is faulty, and the control circuit 12 determines that the substrate tape 123 is faulty, and controls the driving assembly 11 to stop rotating, so as to prevent the substrate tape 123 from being pulled off due to the jamming.

[0094] When the change period of the electric signal is within the preset time period T1, that is, the first electric signal V1 is received at the first time point T11, the second electric signal V2 is received at the second time point T12, and the first electric signal V1 is received again at the third time point T13, which indicates that the substrate tape 123 is working normally, and there is no broken tape or jamming. At this time, the control circuit 12 can continue to control the driving assembly 11 to work, so that the substrate tape 123 is heated in the atomization cavity 127 to generate aerosol generating substrate.

[0095] The first time period and the second time period within the preset time period T1 can be set according to the length or the setting position of the first magnetic induction section 21 and the second magnetic induction section 22.

[0096] Meanwhile, during the movement of the first spool 124 and the second spool 125, the number of turns and the overall thickness of the substrate tape 123 on the first spool 124 and the substrate tape 123 on the second spool 125 are respectively reduced and increased. In the case where the angular velocity is unchanged, the linear velocity of the substrate tape 123 passing through the magnetic field position changes, that is, the time interval of the change of the first electric signal V1 and the second electric signal V2 changes. Therefore, the size of the first time period and the second time period can be set according to the changed time interval, and the size of the first time period and the second time period can be slightly larger than the time interval of the change of the two electric signals at the minimum linear velocity.

[0097] The control circuit 12 can select an MCU, a single-chip microcomputer or the like processor, and can also be provided with a corresponding signal processing unit. In an optional embodiment, as shown in FIG. 8, the control circuit 12 includes a current sampling circuit 14 and a controller 15 connected with each other. The current sampling circuit 14 is connected with the magnetic induction coil assembly 13, and is used for sampling the current signal generated by the magnetic induction coil assembly 13, and converting the current signal into a voltage sampling signal.

[0098] The controller 15 is configured to output an enabling signal and control the driving assembly 11 to rotate, periodically detect the change frequency of the voltage sampling signal within a preset time period T1, and determine the movement state of the substrate tape 123 based on the change frequency of the voltage sampling signal.

[0099] In this embodiment, the electric signal generated by the magnetic induction coil assembly 13 is a current signal. In order to facilitate signal comparison and identification, the control circuit 12 is provided with a current sampling circuit 14. The current sampling circuit 14 samples the current signal of the magnetic induction coil assembly 13 and converts it into a voltage sampling signal. The voltage sampling signal can be converted into a digital signal of a corresponding size by a voltage comparator or an analog-to-digital converter arranged in the controller 15, so as to be identified and determined. The controller 15 realizes the function of the control circuit 12, controls the driving assembly 11 to rotate, thereby driving the two reels and the substrate tape 123 to move, and periodically detects the change frequency of the voltage sampling signal within a preset time period T1. It is determined whether the magnetic induction coil assembly 13 generates different sizes of current signals at the preset time point and the preset time period, and it is further determined whether the first magnetic induction section 21 and the second magnetic induction section 22 on the substrate tape 123 pass through the magnetic field position in time sequence, so as to determine the movement state of the substrate tape 123 and realize the corresponding control of the driving assembly 11.

[0100] In order to facilitate the user to determine the current state of the substrate tape 123, the host 110 is further provided with an alarm assembly connected with the controller 15. The controller 15 is further configured to output a fault alarm control signal when the substrate tape 123 fails, and drive the alarm assembly to output a fault alarm signal. The alarm assembly can be a buzzer, a loudspeaker, or an indicator light.

[0101] The first magnetic induction section 21 and the second magnetic induction section 22 can be magnetic induction sections additionally arranged on the substrate tape 123, or can be the structure of the substrate tape 123 itself. In an optional embodiment, the substrate tape 123 includes a belt-shaped substrate and an aerosol generating substrate arranged on the belt-shaped substrate. The belt-shaped substrate can be heated under the magnetic field generated by the magnetic induction coil assembly 13. The belt-shaped substrate is alternately composed of the first magnetic induction section 21 and the second magnetic induction section 22. The magnetic induction coil assembly 13 generates different sizes of electric signals when it is magnetically coupled with the first magnetic induction section 21 and the second magnetic induction section 22, respectively.

[0102] The strip-shaped substrate is a metal structure, which can generate eddy current and heat the aerosol generating substrate under the action of the magnetic field. For example, as shown in FIG. 9, the strip-shaped substrate is composed of first magnetic induction sections 21 and second magnetic induction sections 22 alternately. When the first magnetic induction sections 21 are coupled with the magnetic induction coil assembly 13, the magnetic induction coil assembly 13 generates a first electric signal V1. When the second magnetic induction sections 22 are coupled with the magnetic induction coil assembly 13, the magnetic induction coil assembly 13 generates a second electric signal V2. The varying electric signal can be recognized by the controller 15, so as to determine whether the substrate strip 123 has the problem of broken strip or jammed strip, and to realize corresponding alarm indication and control of the aerosol generating device 100.

[0103] In another optional embodiment, the substrate strip 123 includes a strip-shaped substrate and an aerosol generating substrate arranged on the strip-shaped substrate. The first magnetic induction sections 21 and the second magnetic induction sections 22 are arranged on the strip-shaped substrate or the aerosol generating substrate at intervals. The magnetic induction coil assembly 13 generates different sizes of electric signals when coupled with the first magnetic induction sections 21 or the second magnetic induction sections 22.

[0104] In this embodiment, the strip-shaped substrate is a metal structure, which can generate eddy current and heat the aerosol generating substrate under the action of the magnetic field.

[0105] The first magnetic induction sections 21 and the second magnetic induction sections 22 can be arranged on the strip-shaped substrate or the aerosol generating substrate. When the first magnetic induction sections 21 are coupled with the magnetic induction coil assembly 13, the magnetic induction coil assembly 13 generates a first electric signal V1. When the second magnetic induction sections 22 are coupled with the magnetic induction coil assembly 13, the magnetic induction coil assembly 13 generates a second electric signal V2. The varying electric signal can be recognized by the controller 15, so as to determine whether the substrate strip 123 has the problem of broken strip or jammed strip, and to realize corresponding alarm indication and control of the aerosol generating device 100.

[0106] In order to generate different sizes of electric signals, the parameters of the first magnetic induction sections 21 and the second magnetic induction sections 22 are different. When the parameters are different, the magnetic induction coil assembly 13 generates different sizes of equivalent inductance Leq and equivalent resistance Req when coupled with the first magnetic induction sections 21 and the second magnetic induction sections 22, respectively. The varying electric signal can be recognized by the controller 15, so as to determine whether the substrate strip 123 has the problem of broken strip or jammed strip, and to realize corresponding alarm indication and control of the aerosol generating device 100.

[0107] The effect of the magnetic field coupling is related to the material, shape and thickness of the magnetic induction section. Correspondingly, the parameter is at least one of the cross-sectional area, thickness and material of the magnetic induction section. At least one of the cross-sectional area, thickness and material of the first magnetic induction sections 21 and the second magnetic induction sections 22 is different.

[0108] Wherein, in the case of the cross-sectional area and thickness of the magnetic induction section being constant, the better the electrical conductivity of the magnetic induction section, the greater the eddy current generated by the magnetic induction section, the smaller the equivalent inductance Leq and equivalent resistance Req coupled back to the magnetic induction coil assembly 13, the greater the current signal, and vice versa. The electrical conductivity of the magnetic induction section is worse, the smaller the eddy current generated by the magnetic induction section, the greater the equivalent inductance Leq and equivalent resistance Req coupled back to the magnetic induction coil assembly 13, the smaller the current signal. By changing the material of the magnetic induction section, the size of the current signal on the magnetic induction coil assembly 13 can be changed. For example, as shown in FIG. 9, the first magnetic induction section 21 is set to aluminum foil, and the second magnetic induction section 22 is set to 430 material, to achieve the purpose of changing the coupling parameters.

[0109] In addition, in the case of the material and thickness of the magnetic induction section being constant, the greater the cross-sectional area of the magnetic induction section, the greater the eddy current generated by the magnetic induction section, the smaller the equivalent inductance Leq and equivalent resistance Req coupled back to the magnetic induction coil assembly 13, the greater the current signal, and vice versa. The smaller the cross-sectional area of the magnetic induction section, the smaller the eddy current generated by the magnetic induction section, the greater the equivalent inductance Leq and equivalent resistance Req coupled back to the magnetic induction coil assembly 13, the smaller the current signal. By changing the cross-sectional area of the magnetic induction section, the size of the current signal on the magnetic induction coil assembly 13 can be changed. For example, the cross-sectional area of the first magnetic induction section 21 is set to S1, and the cross-sectional area of the second magnetic induction section 22 is set to S2, S1 is not equal to S2, to achieve the purpose of changing the coupling parameters.

[0110] In addition, in the case of the material and cross-sectional area of the magnetic induction section being constant, the greater the thickness of the magnetic induction section, the greater the eddy current generated by the magnetic induction section, the smaller the equivalent inductance Leq and equivalent resistance Req coupled back to the magnetic induction coil assembly 13, the greater the current signal, and vice versa. The smaller the thickness of the magnetic induction section, the smaller the eddy current generated by the magnetic induction section, the greater the equivalent inductance Leq and equivalent resistance Req coupled back to the magnetic induction coil assembly 13, the smaller the current signal. By changing the cross-sectional area of the magnetic induction section, the size of the current signal on the magnetic induction coil assembly 13 can be changed. For example, as shown in FIG. 9, the thickness of the first magnetic induction section 21 is set to H1, and the cross-sectional area of the second magnetic induction section 22 is set to H2, H1 is not equal to H2, to achieve the purpose of changing the coupling parameters.

[0111] Therefore, at least one of the cross-sectional area, thickness and material of the first magnetic induction section 21 and the second magnetic induction section 22 can be changed to achieve the purpose of changing the coupling parameters.

[0112] The cross-sectional area can be changed by changing the length and width of the first magnetic induction section 21 and the second magnetic induction section 22. In an optional embodiment, as shown in FIG. 10, the cross-sectional areas of the first magnetic induction section 21 and the second magnetic induction section 22 are different. The first magnetic induction section 21 is provided with a first through hole, and the second magnetic induction section 22 is not provided with a through hole.

[0113] The first magnetic induction section 21 is provided with a first through hole in a unit area, and the cross-sectional area of the first magnetic induction section 21 in a unit area is reduced, so that the first electric signal V1 generated by the magnetic induction coil assembly 13 when coupled with the magnetic induction coil assembly 13 is small. The second magnetic induction section 22 is not provided with a through hole in a unit area, and the cross-sectional area of the second magnetic induction section 22 in a unit area is unchanged. The second electric signal V2 generated by the magnetic induction coil assembly 13 when coupled with the magnetic induction coil assembly 13 is greater than the first electric signal V1. The changed electric signal can be recognized by the controller 15, so as to judge whether the substrate strip 123 is broken or jammed, and then realize corresponding alarm indication and control of the aerosol generating device 100.

[0114] Alternatively, in another optional embodiment, as shown in FIG. 11 or FIG. 12, the first magnetic induction section 21 is provided with a first through hole 23, and the second magnetic induction section 22 is provided with a second through hole 24. The shapes or diameters of the first through hole 23 and the second through hole 24 are different.

[0115] The first through hole 23 and the second through hole 24 are different in shape or diameter, and correspondingly, the cross-sectional areas of the first magnetic induction section 21 and the second magnetic induction section 22 are different. The first electric signal V1 generated by the magnetic induction coil assembly 13 when coupled with the magnetic induction coil assembly 13 is different from the second electric signal V2 generated by the magnetic induction coil assembly 13 when coupled with the magnetic induction coil assembly 13. The changed electric signal can be recognized by the controller 15, so as to judge whether the substrate strip 123 is broken or jammed, and then realize corresponding alarm indication and control of the aerosol generating device 100.

[0116] Alternatively, in another optional embodiment, as shown in FIG. 13, the first magnetic induction section 21 is provided with a first array hole 25, and the second magnetic induction section 22 is provided with a second array hole 26. The first array hole 25 and the second array hole 26 are different.

[0117] The first array hole 25 includes a plurality of arrayed through holes, and the second array hole 26 includes a plurality of arrayed through holes. At least one of the number of through holes, the diameter of the through hole, and the shape of the first array hole 25 is different from the corresponding number of through holes, the diameter of the through hole, and the shape of the second array hole 26, so that the cross-sectional areas of the first magnetic induction section 21 and the second magnetic induction section 22 are different.

[0118] For example, as shown in FIG. 13, the first magnetic induction section 21 is provided with an array of 9 through holes, and the second magnetic induction section 22 is provided with 4 through holes. The cross-sectional area of the first magnetic induction section 21 is smaller, and the first electric signal V1 generated by the magnetic sensing coil assembly 13 coupled with the first magnetic induction section 21 is smaller than the second electric signal V2 generated by the magnetic sensing coil assembly 13 coupled with the second magnetic induction section 22. The varying electric signal can be recognized by the controller 15, and the presence of a broken or jammed substrate belt 123 can be determined, and corresponding alarm indication and control of the aerosol generating device 100 can be realized.

[0119] The aerosol generating device 100 described above comprises a main housing 111, a medium cartridge 120, a driving assembly 11, a heating assembly, and a control circuit 12. The medium cartridge 120 is internally provided with a first spool 124, a second spool 125, and a substrate belt 123 wound around the two spools. The substrate belt 123 is provided with first magnetic induction sections 21 and second magnetic induction sections 22 alternately spaced. When the first spool 124 and the second spool 125 are driven to rotate, the magnetic sensing coil assembly 13 of the heating assembly generates a magnetic field and is coupled with the first magnetic induction sections 21 and the second magnetic induction sections 22 to generate electric signals of different sizes. The control circuit 12 samples and detects the electric signals generated by the magnetic sensing coil assembly 13, determines the movement state of the substrate belt 123 based on the electric signals, and determines whether a broken or jammed substrate belt 123 is present. Accordingly, the driving assembly 11 can be controlled and / or an alarm prompt can be issued, the state of the substrate belt 123 can be detected, invalid heating can be reduced, and the safety of the aerosol generating device 100 can be improved.

[0120] The second aspect of the present application provides a substrate belt 123 state detection method, which is applied to the aerosol generating device 100 described above. As shown in FIG. 14, the substrate belt 123 state detection method comprises:

[0121] Step S10: booting, outputting an enable signal to drive the magnetic sensing coil assembly 13 to generate a magnetic field and control the driving assembly 11 to rotate.

[0122] After the device is powered on, when it is detected that the medium cartridge 120 is installed into the accommodating cavity 113, an enabling signal is output to drive the magnetic coil assembly 13 to generate a magnetic field, and a driving signal is output to control the driving assembly 11 to work, the driving assembly 11 drives the first spool 124 or the second spool 125 to rotate, and drives the first magnetic induction segment 21 and the second magnetic induction segment 22 on the substrate tape 123 to pass through the magnetic field position of the atomization cavity 127 in sequence, the first magnetic induction segment 21 and the second magnetic induction segment 22 generate eddy currents and heat the aerosol generating substrate on the substrate tape 123 to generate an aerosol for a user to smoke. On the other hand, the magnetic field is coupled with the magnetic field to make the magnetic coil assembly 13 generate a first electric signal V1 and a second electric signal V2, respectively.

[0123] In step S20, it is detected whether the electric signal generated by the magnetic coil assembly 13 changes within a threshold time, and when the electric signal does not change, it is determined that the substrate tape 123 is faulty, and the driving assembly 11 is controlled to stop rotating.

[0124] The control circuit 12 synchronously and periodically detects the change of the electric signal, and when the electric signal does not change within a threshold time, for example, no change of the electric signal is detected for more than 1s, it indicates that the substrate tape 123 is jammed or broken, or when the first electric signal V1 is received and no subsequent changed second electric signal V2 is received after more than a threshold time, it indicates that the substrate tape 123 is broken, at this time, it is determined that the substrate tape 123 is faulty, and the driving assembly 11 is controlled to stop rotating, so as to prevent the jammed substrate tape 123 from being pulled off or prevent the broken substrate tape 123 from being swung in the medium cartridge 120 to cause damage to the device.

[0125] In step S30, when the electric signal changes within a threshold time, it is judged whether the change period of the electric signal is within a preset time period T1, the length of the threshold time is greater than the length of the preset time period T1, and when the change period of the electric signal exceeds the preset time period T1, it is determined that the substrate tape 123 is faulty, and the driving assembly 11 is controlled to stop rotating.

[0126] When it is detected that the electric signal changes within a threshold time, i.e., the first magnetic induction segment 21 and the second magnetic induction segment 22 pass through the magnetic field position in sequence, at this time, it is further judged whether the change period of the electric signal corresponding to each magnetic induction segment is within a preset time period T1, i.e., whether the electric signal switches according to a preset time period, whether the control circuit 12 receives the corresponding electric signal within the preset time period T1.

[0127] When the change period of the electrical signal exceeds the preset time period T1, it is determined that the substrate tape 123 is faulty, and the control driving assembly 11 is stopped from rotating. For example, as shown in FIG. 8, the first electrical signal V1 is received at the first time point T11, and then the second electrical signal V2 is received after exceeding the second time point T12, or the second electrical signal V2 is received at the second time point T12, and then the first electrical signal V1 is received after exceeding the third time point T13, which indicates that the substrate tape 123 is faulty, and the control circuit 12 determines that the substrate tape 123 is faulty, and controls the driving assembly 11 to stop rotating, so as to prevent the faulty substrate tape 123 from being pulled off.

[0128] In step S40, when the change period of the electrical signal is within the preset time period T1, it is determined that the substrate tape 123 is normal, and the driving assembly 11 continues to rotate.

[0129] When the change period of the electrical signal is within the preset time period T1, that is, the first electrical signal V1 is received at the first time point T11 of the preset time period T1, the second electrical signal V2 is received at the second time point T12, and the first electrical signal V1 is received again at the third time point T13, which indicates that the substrate tape 123 is working normally, and there is no broken tape or jammed tape. At this time, the control circuit 12 can continue to control the driving assembly 11 to work, so that the substrate tape 123 is heated in the atomization cavity 127 to generate an aerosol generating substrate.

[0130] The first time period and the second time period within the preset time period T1 can be set according to the length or the setting position of the first magnetic induction section 21 and the second magnetic induction section 22.

[0131] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An aerosol generating device, comprising: a main housing provided with a receiving cavity; a medium cartridge detachably arranged in the receiving cavity, a first reel and a second reel being arranged inside the medium cartridge at intervals, a substrate tape being wound around the first reel and the second reel and connected by the substrate tape, the substrate tape being heated to generate aerosol, the substrate tape being provided with first magnetic induction sections and second magnetic induction sections arranged at intervals; a driving assembly connected to the first reel and / or the second reel, configured to drive the first reel or the second reel to rotate to move the substrate tape between the first reel and the second reel; a heating assembly, the heating assembly comprising a magnetic induction coil assembly arranged in the main housing, the magnetic induction coil assembly being configured to generate a magnetic field according to an enable signal, the magnetic induction coil assembly generating different sizes of electric signals when being coupled with the first magnetic induction sections and the second magnetic induction sections respectively; a control circuit electrically connected to the driving assembly and the heating assembly, configured to output the enable signal and control the driving assembly to rotate, and detect the electric signals generated by the magnetic induction coil assembly, and determine the movement state of the substrate tape based on the electric signals.

2. The aerosol-generating device of claim 1, wherein, The control circuit periodically detects the change frequency of the electric signals generated by the magnetic induction coil assembly according to a preset time period, and determines the movement state of the substrate tape based on the change frequency of the electric signals.

3. The aerosol-generating device of claim 2, wherein, The control circuit is specifically configured to: output the enable signal to drive the magnetic induction coil assembly to generate a magnetic field and control the driving assembly to rotate; detect whether the electric signals change within a threshold time, and determine that the substrate tape is faulty when the electric signals do not change, and control the driving assembly to stop rotating, the length of the threshold time being greater than the length of the preset time period; or, when the electric signals change within the threshold time, determine whether the change period of the electric signals is within the preset time period, and determine that the substrate tape is faulty when the change period of the electric signals exceeds the preset time period, and control the driving assembly to stop rotating; when the change period of the electric signals is within the preset time period, determine that the substrate tape is normal, and continue to control the driving assembly to rotate.

4. The aerosol-generating device of claim 2 or 3, wherein, The control circuit comprises: a current sampling circuit connected to the magnetic induction coil assembly, configured to sample the current signals generated by the magnetic induction coil assembly and convert the current signals into voltage sampling signals; a controller configured to output the enable signal and control the driving assembly to rotate, and periodically detect the change frequency of the voltage sampling signals within the preset time period, and determine the movement state of the substrate tape based on the change frequency of the voltage sampling signals. 5.The aerosol generating device of claim 1, wherein, The substrate tape comprises a belt-shaped substrate and an aerosol generating substrate arranged on the belt-shaped substrate, the belt-shaped substrate being heatable under the magnetic field generated by the magnetic induction coil assembly; the belt-shaped substrate is composed of the first magnetic induction sections and the second magnetic induction sections, the magnetic induction coil assembly generating different sizes of electric signals when being coupled with the first magnetic induction sections and the second magnetic induction sections respectively. 6.The aerosol generating device of claim 1, wherein, The substrate strip comprises a strip-shaped substrate and an aerosol generating substrate arranged on the strip-shaped substrate; The strip-shaped substrate or the aerosol generating substrate is provided with a first magnetic induction section and a second magnetic induction section at intervals, and the magnetic induction coil assembly is coupled with the first magnetic induction section or the second magnetic induction section to generate different sizes of electrical signals.

7. The aerosol-generating device of claim 5 or 6, wherein, At least one of the cross-sectional area, thickness and material of the first magnetic induction section and the second magnetic induction section is different.

8. The aerosol-generating device of claim 5 or 6, wherein, The first magnetic induction section is provided with a first through hole, and the second magnetic induction section is not provided with a through hole; or The first magnetic induction section is provided with a first through hole, and the second magnetic induction section is provided with a second through hole, and the shape or aperture of the first through hole and the second through hole is different.

9. The aerosol-generating device of claim 5 or 6, wherein, The first magnetic induction section is provided with a first array hole, and the second magnetic induction section is provided with a second array hole, and the first array hole and the second array hole are different. 10.A method of detecting a state of a substrate tape, applied to the aerosol generating device of any one of claims 1 to 9, wherein, The substrate strip state detection method comprises: Turning on, outputting an enable signal to drive the magnetic induction coil assembly to generate a magnetic field and control the driving assembly to rotate; Detecting whether the electrical signal generated by the magnetic induction coil assembly changes within a threshold time, determining that the substrate strip is faulty when the electrical signal does not change, and controlling the driving assembly to stop rotating; or When the electrical signal changes within the threshold time, determining whether the change period of the electrical signal is within a preset time period, determining that the substrate strip is faulty when the change period of the electrical signal exceeds the preset time period, controlling the driving assembly to stop rotating, and the length of the threshold time is greater than the length of the preset time period; When the change period of the electrical signal is within the preset time period, determining that the substrate strip is normal, and continuing to control the driving assembly to rotate.

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