Aerosol generating device and method for detecting user contact with an article inserted into the device - Patents.com

Abstract

To provide a new aerosol generating device.SOLUTION: An aerosol generating device for receiving an aerosol generating article comprises an electrical circuit comprising a controller for determining a change in an electrical property of the circuit. The change in the electrical property of the circuit is caused by a user interacting with the aerosol generating article received by the aerosol generating device.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to an aerosol generating device and an article for use with an aerosol generating device. [Background technology]

[0002] Smoking articles, such as cigarettes, cigars, etc., burn tobacco to produce tobacco smoke when used. Attempts have been made to provide alternatives to these tobacco burning articles that release compounds from materials without combustion. Examples of such products are so-called heat-not-burn products, which release compounds by heating the material rather than by burning it. The material may be, for example, tobacco or other non-tobacco materials, which may or may not contain nicotine. Summary of the Invention

[0003] According to a first aspect of the present invention, there is provided an aerosol generating device for receiving an aerosol product, the aerosol generating device comprising an electrical circuit, the electrical circuit comprising a controller for determining a change in an electrical characteristic of the electrical circuit, the change being caused by a user's interaction with the aerosol product received by the aerosol generating device.

[0004] The change in the characteristic of the circuit may be caused by a user touching the aerosol product article. The article may include a conductive material, and the change in the electrical circuit may be caused by a user interacting with the conductive material. The change may be caused by a user touching the conductive material, thereby electrically grounding it. The change may be a change in capacitance of the circuit, and the controller may be configured to detect the change in capacitance by detecting a change in a time constant of the circuit. The device may be configured to evaluate the detected change in the characteristic of the circuit to indicate whether an article received within the device is of a predetermined type. The controller may be configured to prevent use of the device when the detected change in the characteristic of the circuit indicates that an article received within the device is not an approved article.

[0005] According to a second aspect of the present invention, there is provided an aerosol product article for an aerosol generating device according to the first aspect of the present invention, the article comprising a conductive material, the conductive material comprising a first portion for interacting with a user when the user is in contact with the article, and a second portion for electromagnetically interacting with the aerosol generating device.

[0006] The conductive material may be at least partially disposed on an exterior surface of the article such that it may be directly touched by a user. The conductive material may be disposed such that no portion of the material is directly touchable by a user.

[0007] According to a third aspect of the invention, there is provided a method for detecting a user's interaction with an object inserted into a device according to the first aspect of the invention, comprising: vinegar In one embodiment, a method is provided that includes detecting a change in a characteristic of an electrical circuit when the electrical circuit is turned on.

[0008] The method may include detecting a change in capacitance of a circuit when a user interacts with a conductive material in the article. The method may include comparing the change in a characteristic of the circuit to a list of at least one value and enabling the device when the change in the characteristic of the circuit corresponds to the at least one value.

[0009] Further features and advantages of the present invention will become apparent from the following description of preferred embodiments of the invention, given by way of example only, made with reference to the accompanying drawings, in which: [Brief description of the drawings]

[0010] [Figure 1] 1 shows a longitudinal cross-sectional view of an aerosol generating device and an aerosol product. [Diagram 2] 1 shows a partial cross-sectional view of a first exemplary aerosol product article. [Diagram 3] 1 shows a partial cross-sectional view of a second exemplary aerosol product article. [Figure 4] 1 shows a partial cross-sectional view of a third exemplary aerosol product article. [Diagram 5] 1 shows a partial cross-sectional view of a fourth exemplary aerosol product article. [Figure 6] 1 shows a schematic cross-sectional view of an exemplary aerosol-forming device with an aerosol product inserted therein. [Figure 7] 1 shows a schematic diagram of an exemplary circuit for use in an aerosol-forming device according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Referring to Fig. 1, a longitudinal cross-sectional view of an aerosol generating device 100 is shown. The aerosol generating device 100 has a power supply compartment 110 that houses a power supply 112 and a conductive element 114 for transmitting energy through the device 100. In one example, the power supply 112 is a source of electrical energy such as a battery, which may be, for example, a rechargeable or disposable battery. The conductive element 114 may be a wire or the like. The power supply compartment 110 is located towards the distal end 102 of the device 100 in the example shown in Fig. 1.

[0012] The device 100 has a controller compartment 120 that houses a controller 122. The controller 122 controls the operation of the device 100 based on information received from at least one sensor, such as, for example, a puff sensor (not shown) located within the device 100, or based on requests made by a user of the device 100, for example via a user input means 140. The device 100 is configured to detect changes in an electrical characteristic of an electrical circuit formed at least in part by the battery 112, the conductive element 114, and the controller 122.

[0013] The device 100 has an item receiving compartment 130 disposed toward the proximal end 104 of the device 100. The item receiving compartment 130 defines a chamber 131 in which the item 500 can be received. The item receiving compartment 130 includes a conductive surface 132 and a heating element 134. In the example of Figure 1, the conductive surface 132 is a single plate of conductive material. In other examples, more than one conductive surface can be used, for example, more than one conductive plate.

[0014] The conductive surface 132 is for sensing changes in the local environment of the chamber 131. That is, the conductive surface 132 is for sensing the insertion of the item 500 into the chamber 131 and for sensing changes in the electrical properties of the item 500 when inserted into the chamber 131.

[0015] The conductive surface 132 is part of a circuit formed at least in part by the battery 112, the conductive element 114, and the controller 122. The conductive surface 132 is configured to effect a change in an electrical characteristic of the circuit when a change in the local environment of the chamber 131 is detected. For example, the conductive surface 132 is configured to effect a change in an electrical characteristic of the circuit when the item 500 is inserted into the chamber 131. The conductive surface 132 is configured to cause a change in an electrical characteristic of the circuit when a user interacts with the item 500 when the item 500 is inserted into the chamber 131, as discussed in more detail below. Thus, the circuit formed by the power source 112, the conductive element 114, the controller 122, and the conductive surface 132 form a sensing circuit for sensing the insertion of the item 500 and for sensing a user's interaction with the item 500 when inserted into the device 100.

[0016] Conductive surface 132 is positioned to be affected by changes in the electromagnetic environment in the vicinity of conductive surface 132. For example, conductive surface 132 may be positioned to be affected by the insertion of a conductive material into chamber 131. When conductive surface 132 is affected by a user-related interaction, such as may occur during insertion of article 500 into chamber 131, the capacitance of the circuit may be affected.

[0017] The exemplary article 500 shown in FIG. 1 is of elongated form and has a distal end 502 that is inserted into the chamber 131 and a proximal end 504 that is received in the mouth of a user. The article 500 has a mouthpiece 510 disposed at its proximal end 504. The mouthpiece 510 may have a filter or the like for selectively removing components from the generated aerosol prior to inhalation by the user. In other examples, the article 500 may not be of elongated form and may take any suitable form, for example, may not have a mouthpiece 504. The article 500 has a conductive material 532 that extends along the length of the article 500 in this example. In the example of FIG. 1, the conductive material 532 extends from the proximal end 504 along the majority of the length of the article 500. In other examples, the conductive material 532 may extend along any portion of the length of the article 500, for example, a small portion of the length of the article.

[0018] The conductive material 532 is configured such that when the article 500 is fully inserted into the device 100, at least a portion of the conductive material 532 is disposed adjacent to the conductive surface 132 of the device 100 such that the conductive material 532 can electromagnetically interact with the conductive surface 132.

[0019] The conductive surface 132 and / or the conductive material 532 may include any suitable conductive material, for example, aluminum, conductive ink, or graphite.

[0020] In use, a user inserts the article 500 into the chamber 131, and the conductive surface 132 and at least a portion of the conductive material 532 are disposed in close proximity to one another such that they may electromagnetically interact with one another. When disposed in such close proximity to one another, the first conductive surface 132 and the second conductive surface 532 may both have a first capacitance C0.

[0021] When a user touches an article 500 received by the device 100, the user changes a characteristic of the circuit. For example, the capacitance of the circuit may change due to the user's interaction with the article 500. The change may be caused by the user touching the conductive material 532 in the article 500, thereby acting to electrically ground the article 500, or by the user interacting with the conductive material 532, such as by holding the article 500 and deforming it, or by a capacitive coupling effect between the user and the conductive material 532 of the article. The user's interaction with the conductive material 532 may act to change the capacitance of the circuit due to changing the capacitance at the conductive surface 132 and the conductive material 532, for example, to a second capacitance value C2. The change in capacitance from C0 to C2 may be detected by the controller 122.

[0022] Received by the device 100 Ta Utilizing the effect of user interaction with the article may result in a relatively large change in the electrical characteristics of the circuit. For example, a relatively small change in capacitance in the circuit may occur due to the insertion of an article that is not significantly affected by the user interaction. In the example described herein, the user interaction with the article 500 may amplify the change in electrical characteristics generated in the electrical circuit. For example, by grounding the conductive material 532 or by creating a capacitive coupling between the user and the article 500, a larger change in capacitance of the circuit may occur than that generated by the insertion of an article that is not affected by the user interaction. A larger degree of change may allow for more reliable detection. This in turn allows the controller 122 to more accurately determine the characteristics of the article 500, for example, by providing a more reliable value for comparison to a list of predefined values, as described below.

[0023] The controller 122 can compare the change in capacitance detected when the article 500 is inserted with a database of capacitance values. In this way, the controller 122 can obtain an indication of whether the inserted article 500 is of a predetermined type. For example, the controller 122 can determine whether the article 500 is an article approved by the manufacturer for use with the device 100 (also referred to herein as an "approved article"), which is done by comparing the change in capacitance to the detected first capacitance C0 with a list of predetermined capacitance values associated with the approved article. If the detected capacitance matches a value from the list of predetermined values, the controller 122 can determine that the article 500 is approved for use and can be configured to enable the use of the device 100. In a preferred example, the controller 122 can be configured to prevent the use of the device 100 if the detected capacitance indicates that the use of the article 500 is not approved.

[0024] As described above, the controller 122 is also configured to detect a change in the capacitance of the conductive surface 132 and the conductive material 532 to a second capacitance value C2 due to the user interacting with the conductive material 532. The detected change in capacitance can be used, as described in the previous paragraph, by comparing it with a database of capacitance values to indicate the type of article 500 inserted into the device 100. In a preferred example, the change in capacitance of the circuit due to the user interacting with the article 500 inserted into the device is used to determine whether the article 500 is of a predetermined type, for example, whether the article 500 is approved for use by the manufacturer of the device 100. The device 100 may or may not be made available for use depending on whether the inserted article 500 is approved.

[0025] In some embodiments, articles having different aerosolizable materials (i.e., materials that provide different flavored aerosols or different strengths of flavors / actives) may comprise different conductive materials that affect the characteristics of the electronic circuitry differently when a user interacts with the article 500. For example, a change in capacitance of a specific first magnitude may indicate one flavor of the aerosolizable material, while a change in capacitance of a specific second magnitude may indicate another flavor of the aerosolizable material. The controller 122 may be configured not only to detect the change in capacitance, but also to quantify the change in capacitance and associate the change with a given article 500. The controller 122 may enable the device to provide different actions based on the magnitude of the change in capacitance.

[0026] In some examples, the device 100 can detect the length of time the user touches the article 102 while the article 500 is inserted into the device 100 by detecting a change in capacitance. The device 100 can detect the location where the article 500 is touched by the user by measuring the change in capacitance and comparing it to a reference value. In some examples, the device 100 can infer the duration of a user's puff by detecting contact with the user's lips and the duration of such contact.

[0027] Once the device 100 is enabled, the controller 122 can command the power source 112 to provide energy to the heating element 134. The heating element 134 can be a resistive heater, a chemical heater, an inductive heater, or the like. Operation of the heating element 134 can be based on detection of the start of a smoking session by a puff sensor in the device 100. Alternatively, the user can select activation of the heating element 134 via an interface 140 on the device 100 after the device 100 has entered an operational state. The user can be notified via the interface 140 on the device 100 that the device 100 has entered an operational state.

[0028] In some examples, the detected change in capacitance can be used to indicate that a user is in contact with the article 500 and can serve as an indication that the user is using the device 100. For example, the user's indication that the device 100 is in use can be used by the controller to maintain operation of the device 100, and the controller 122 may be configured to change an operating factor of the device 100 when no use of the device 100 is detected (through a detected change in capacitance) for a predetermined amount of time. For example, the controller 122 can be configured to deactivate the device 100 when it detects that the user has not been in contact with the article 500 for a period of time such as four minutes or one minute.

[0029] The device 100 may require that a change in capacitance associated with an approved article being touched by a user be detected at regular intervals to maintain operation of the device 100. The device 100 may be enabled for a typical time required for a smoking session. In one example, the device 100 is enabled for approximately four minutes. In an alternative example, the device 100 is enabled for a shorter time. The advantage associated with enabling the device 100 for a shorter period of time is that if an attempt to disable the device 100 results in the device 100 being enabled despite the use of an unapproved article, such an attempt would need to be repeated during the smoking session. This makes disabling the device 100 more onerous for anyone attempting to do so.

[0030] In another example, the change in capacitance to C2 can act as a wake-up signal for the device. For example, the device may be nominally provided in a low-power state (by default or by operation of a hard on / switch, e.g., a user-actuable button provided on the surface of the device). In the low-power state, the functionality of the device may be limited, but the controller 122 is configured to detect the change in capacitance. When the user inserts the item 500 into the device, the user touches the item 500, grounding it. Thus, when the item 500 is fully inserted, the capacitance C2 is detected by the controller 122. Upon detecting the capacitance C2 for the first time, the controller 122 is configured to transition the device from the low-power state to a high-power state (i.e., a state in which the functionality of the device is not limited). For example, this may cause power to be provided to a heater or power to be provided to a display screen of the device. In this manner, the device may transition from a low-power state to a high-power state based on detection of a particular capacitance value indicative of a user interacting with the item 500.

[0031] An example of an article 500 for use with device 100 of Figure 1 is shown in Figures 2-5. Article 500 shown in Figure 2 has a distal end 502 for insertion into device 100 of Figure 1 and a proximal end 504 having a mouthpiece 510 for placement in a user's mouth. Conductive material 532 has multiple connected portions 532a, 532b, 532c.

[0032] A first portion 532a of the conductive material 532 is disposed at the proximal end 504 of the article 500. The first portion 532a is located near the mouthpiece 510 and may surround a portion of the mouthpiece 510. The first portion 532a is positioned such that a user can interact with a surface of the article 500 when the user holds the article 500 on a finger or in the mouth during use. The first portion 532a senses a user's interaction with the article 500 and changes are detected by the controller 122.

[0033] The first portion 532a is connected to the second portion 532b of the conductive material 532. The second portion 532b is a connection between the first portion 532a and the third portion 532c of the conductive material 532. In the example shown in FIG. 2, the second portion 532b is thinner than the first portion 532a and the third portion 532c. The second portion 532b spans any transitions to the first portion 532a and any transitions to the third portion 532c.

[0034] The third portion 532c is positioned at a predetermined location such that it is within the vicinity of the conductive surface 132 of the device 100. This may be toward the center of the article 500 or toward the distal end 502 of the article 500. The third portion 532c is sized such that electrical changes to the first portion 532a are clearly transmitted to the first conductive surface 132 of the device 100.

[0035] Each portion of the conductive material 532 in the article 500 can be located either inside or outside the article 500, for example, a portion such as the third portion 532c can be located inside the article 500 and can be surrounded by an outer layer of the article 500, such as an outer layer of paper. Whether the portion of the conductive material 532 is located inside or outside can affect the clarity of the signal transmitted to the circuitry of the device 100, with conductive material 532 located on the outside generally exhibiting better signal clarity. The clarity of the signal to the circuitry of the device 100 can also be affected by the size or area of ​​the various portions of the conductive material 532. In an example where the conductive material 532 is on the outer surface of the article 500, the area of ​​the conductive material 532 can be smaller compared to an arrangement where the conductive material 532 is inside the article 500 while maintaining comparable signal clarity.

[0036] In examples where the conductive material 532 is configured to be directly touched by a user, the first portion 532a should not be so small that a user can hold and use the article 500 without touching the conductive material 532. In the example shown in Figure 2, the first portion 532a is on the outside, while the second portion 532b and the third portion 532c are on the inside.

[0037]

[0023] Referring now to Figure 3, there is shown an example of an article 500 for use with the apparatus 100 of Figure 1. The article 500 shown in Figure 3 has similar features to the article 500 shown in Figure 2. Where features are broadly the same across multiple examples, the same reference numbers are used and descriptions will not be repeated.

[0038] All three portions 532a, 532b, 532c of the conductive material 532 are internal in the example shown in FIG. 3. As mentioned above, the first portion 532a of the article 500 in FIG. 3 needs to be larger in area than the first portion 532a of the article 500 in FIG. 2 to exhibit the same signal clarity. For example, in the case of FIG. 3, where there is no direct contact between the user and the conductive portion 532 because a section of the conductive portion 532a is located internally, detection of the user's interaction by the conductive portion may be by capacitive coupling between the user and the conductive portion 532. The internal placement of the first portion 532a in the example of FIG. 3 may be more desirable from the user's perspective since the article 500 has the appearance of a normal consumable product. Furthermore, a user is likely to prefer to touch a mouthpiece with their lips that has a "normal appearance" rather than one that has a conductive material surrounding the mouthpiece. The internal placement of the conductive material 532, as in this example, may also contribute to reducing electrical noise picked up by the conductive material.

[0039] Referring now to FIG. 4, an example of an article 500 for use with the device 100 of FIG. 1 is shown. All three portions 532a, 532b, 532c of conductive material 532 are located externally in the example shown in FIG. 4. As discussed above, placing the conductive surface 532 on the external surface of the article 500 improves the signal quality of a comparable size of conductive material 532. This allows manufacturers to use less conductive material while still maintaining an acceptable amount of signal in use. The conductive material 532 may be incorporated into aesthetic elements such as designs to provide a visually pleasing effect to the user.

[0040] Referring now to FIG. 5, an example of an article 500 for use with the device 100 of FIG. 1 is shown. The conductive surface 532 comprises a continuum, rather than multiple portions having different sizes or widths as in the previous example. The continuum is made of a proximal portion 532a, an intermediate portion 532b, and a distal portion 532c, and may be located on the exterior surface of the article 500 or may be located internally, for example under an outer paper layer of the article 500. If located internally, a larger area of ​​the conductive surface 532 must be used to provide adequate signal strength at the site where the conductive material 532 is located externally. However, as mentioned above, being located internally may be more visually pleasing to the user. This configuration may have some manufacturing advantages since the conductive surface does not need to be patterned in a complex manner.

[0041] The rod may be heated very uniformly by a heater 134 located external to the rod as in device 100 shown in Figure 1. Alternatively, article 500 may be of any shape that corresponds to the cavity 131 of device 100 in which it is used. The only constraint on the shape of article 500 is that, in use, article 500 must extend from the user to a suitable proximal position of conductive surface 132 in device 100 such that conductive material 532 impinges on conductive surface 132.

[0042] It should also be understood that the conductive surfaces described above need not be formed into a continuous loop, i.e., they need not be electrically connected in a circumferential direction around the article 500. For example, the conductive surfaces may form a partial loop around the outer surface of the article, defining a gap between the ends of the conductive surfaces (e.g., a horseshoe arrangement). However, increasing the angular extent of the conductive surfaces around the surface of the article 500 (or within the article 500 if the conductive surfaces are not on the outer surface of the article 500) may be advantageous to allow for a good conductive connection even when the article 500 is held by a user.

[0043] 6, an example of the article 500 in use with the device 100 is shown. An appropriate material can be selected for the outer wall 106 of the device 100 to improve the clarity of the signal detected by the controller 122. For example, the outer wall 106 can be a conductive material that is connected to a circuit and used to ground the circuit when a user touches the outer wall 106. The conductive surface 132 can be backed by an insulating material (not shown) to improve the reliability of the sensing circuit 600. An electrically grounded component (not shown) can be located adjacent to the side of the insulating material facing away from the conductive surface 132, and such component can be grounded, for example, by a connection to the conductive outer wall 106 of the device 100.

[0044] Referring now to Figure 7, an exemplary circuit 600 for use in device 100 will be described. Circuit 600 has many of the features previously shown in Figure 1. Like features are designated by numerals increased by 500, and descriptions of those features will not be repeated here.

[0045] 7 includes a controller 622 for sensing a change in an electrical property of the circuit 600, a conductive surface 632 (which may change an electrical property of the circuit 600), and a conductive element 614 for connecting the controller 622 to the conductive surface 632. The controller 622 may be a microcontroller, a microprocessor, or a timing circuit, and in some examples may be an analog timing circuit.

[0046] The controller 622 has two connection points, a first connection point P1 and a second connection point P2, to the conductive element 614. The circuit 600 also includes a resistor R1 disposed between the conductive surface 632 and the first connection point P1 to the controller 622. Optionally, the circuit 600 may also include a capacitor C1 and a ground 650, as shown generally in Figure 7. The inclusion of the capacitor C1 in the circuit may improve the reliability of the circuit 600 and improve the stability and repeatability of the readings provided by the circuit 600.

[0047] The controller 622 can detect a change in the electrical characteristic of the circuit 600 by toggling the state of the first node P1 and measuring the time it takes to detect the changed state of the second node P2. The time it takes for this to occur is determined by a time constant related to the resistance of resistor R1 and the capacitance of the circuit 600. Thus, the circuit 600 can detect a change in the capacitance of the circuit by detecting a change in the time constant of the circuit.

[0048] The capacitance of circuit 600 includes the capacitance of capacitor C1 (if present) and any additional capacitance present on conductive surface 632 as present when conductive material 532 is placed in proximity to conductive surface 632. As described above, interaction of a user with conductive material 532 changes the capacitance at conductive surface 132 and conductive material 532.

[0049] Thus, a change in capacitance due to, for example, the insertion of the article 500 (change to C0) or due to, for example, a user interaction with the conductive material 532 (change to C2) is detected by the controller 622 as a change in the time constant of the circuit 600. That is, a change in capacitance due to the insertion of the article 500 or a user interaction with the conductive material 532 (e.g., by the user's touching the article 500 with a finger or mouth) changes the time it takes for the second connection point P2 to detect a change in state. The controller 622 can record the time taken and compare it to a database of time periods (which may be included with the controller 622 or may be provided as a separate component of the circuit 600). The values ​​in the database may represent, for example, predetermined time periods associated with approved articles for use with the device 100. When the time period it takes for a change in state to be detected is equal to the predetermined time period, within some predetermined acceptable boundaries, the controller 622 has received an indication that the received article 500 is an approved one, and can enable the device 100.

[0050] The controller 622 controls the toggling of the first connection point P1. The toggling may occur before the start of a usage session, or the controller 622 may toggle the first connection point P1 after a set interval. The controller 622 may be configured to toggle the state of the first connection point P1 periodically throughout the usage session. For example, the controller 622 may continue to periodically switch the state of the first connection point P1 while the puff detector continues to detect that the device 100 is in use. The controller 622 may initially toggle upon request from the user following insertion of the article 500 into the device 100 housing the circuit 600, and then toggle at various intervals during the usage session to ensure that an approved consumable is used throughout the usage session. This prevents activation of the device 100 with an approved consumable that is later replaced in the device 100 from an article that is not approved.

[0051] The above embodiments should be understood as illustrative of the invention. Further embodiments of the invention are envisioned. It should be understood that any feature described in connection with any one embodiment may be used alone or in combination with other features described, and may also be used in combination with one or more features of any other embodiment, or any combination of any other embodiments. Moreover, equivalents and modifications not described above may also be employed without departing from the scope of the invention, which is defined in the appended claims. Sections of the invention

[0052] [Item 1] An aerosol generating device for receiving an aerosol product comprising an electrical circuit, the electrical circuit comprising a controller for determining a change in an electrical characteristic of the electrical circuit, the change in the electrical characteristic of the electrical circuit being caused by a user's interaction with the aerosol product received by the aerosol generating device. [Item 2] 2. The aerosol generating device of item 1, wherein the change in the electrical characteristics of the electrical circuit is caused by a user touching the aerosol production item. [Item 3] 3. An aerosol generating device as described in item 1 or 2, wherein the aerosol product comprises a conductive material, and a change in the electrical properties of the electrical circuit is caused by a user's interaction with the conductive material. [Item 4] 4. The aerosol generating device of item 3, wherein the change in the electrical characteristics of the electrical circuit is caused by a user touching the conductive material, thereby electrically grounding it. [Item 5] The aerosol generation device of item 3 or 4, wherein the aerosol generation device comprises a first conductive surface, and when the article is inserted into the aerosol generation device, the first conductive surface and the conductive material both have a capacitance, and the change in the electrical characteristic of the electrical circuit includes a change in the capacitance due to a user's interaction with the aerosol product. [Item 6] The aerosol generating device described in item 5, wherein the controller detects the change in capacitance by detecting a change in the time constant of the electrical circuit. [Item 7] The aerosol generating device of item 6, wherein the controller is configured to detect a change in the time constant of the electrical circuit by toggling the state of a first connection to the controller and measuring the time to a second connection to the controller to detect a changed state. [Item 8] 8. The aerosol generating device of item 7, wherein the controller is configured to periodically toggle the state of the first connection to detect changes in the capacitance. [Item 9] The aerosol generating device described in any one of items 1 to 8, wherein the controller is configured to enable the aerosol generating device when a change in the electrical characteristics of the electrical circuit is detected. [Item 10] An aerosol generating device described in any one of items 1 to 9, wherein the controller is configured to evaluate a detected change in an electrical characteristic of the electrical circuit to indicate whether the aerosol product received by the aerosol generating device is of a predetermined type. [Item 11] 11. The aerosol generating device of claim 10, wherein the controller is configured to compare the detected change with a list of at least one predetermined value to indicate whether the aerosol product received by the aerosol generating device is of the predetermined type. [Item 12] An aerosol generating device as described in item 10 or 11, wherein the specified type is an approved item, and the controller is configured to enable the aerosol generating device when a change in the detected electrical characteristic indicates that the aerosol product received by the aerosol generating device is an approved item. [Item 13] An aerosol generating device described in any one of items 9 to 12, wherein the specified type is an approved item, and the controller is configured to prevent use of the aerosol generating device when a change in the detected electrical characteristic indicates that the aerosol product received by the aerosol generating device is not an approved item. [Item 14] An aerosol generating device described in any one of items 1 to 10, wherein the controller is configured to use the change in the electrical characteristics of the electrical circuit to determine the length of time that a user is in contact with the aerosol product. [Item 15] An aerosol generating device described in any one of items 1 to 10, wherein the controller is configured to use a change in the electrical characteristics of the electrical circuit to determine at least one location where a user is touching an aerosol product. [Item 16] An aerosol product article for an aerosol generation device described in any one of items 1 to 15, the aerosol product article comprising a conductive material, the conductive material comprising a first portion for interacting with a user when the user is touching the aerosol product article, and a second portion for electromagnetically interacting with the aerosol generation device. [Item 17] Item 17. The aerosol product article according to item 16, wherein the conductive material is at least partially disposed on an outer surface of the aerosol product article such that it can be directly touched by a user. [Item 18] Item 17. The aerosol product article of item 16, wherein the conductive material is positioned such that no part of the conductive material can be directly touched by a user. [Item 19] 19. The aerosol product article according to any one of items 16 to 18, wherein the first portion of conductive material has an end located substantially at a proximal end of the aerosol product article. [Item 20] 20. The article of any one of items 16 to 19, wherein the conductive material has at least one narrow portion and at least one wide portion, and at least one of the at least one wide portion is disposed toward a proximal end of the aerosol product article. [Item 21] 21. The aerosol product article described in item 20, wherein the first portion comprises a first wide portion arranged at a proximal end of the aerosol product for interacting with a user, and the second portion comprises a second wide portion arranged to interact with the conductive surface of the aerosol generation device, and the first wide portion and the second wide portion are connected by the narrow portion. [Item 22] 16. A method for detecting a user's interaction with an aerosol product inserted into an aerosol generation device according to any one of items 1 to 15, comprising detecting a change in a characteristic of the electrical circuit when a user interacts with the aerosol product. [Item 23] 23. The method of claim 22, wherein the aerosol generating device comprises a conductive surface and the aerosol product comprises a conductive material, the method including detecting a change in capacitance of the electrical circuit when a user interacts with the conductive material. [Item 24] 24. The method of claim 22 or 23, further comprising the step of comparing the change to the characteristic of the electrical circuit with a list of at least one value, and enabling the aerosol generation device when the change to the characteristic of the electrical circuit corresponds to the at least one value.

Claims

1. 1. An aerosol generating device for receiving an aerosol product, the aerosol generating device comprising an electrical circuit, The electrical circuit includes: a controller for determining a change in capacitance of the electrical circuit; A conductive surface; Equipped with the aerosol product comprises a conductive material; at least a portion of the conductive material is disposed proximate the conductive surface of the aerosol generation device such that, when the aerosol product is received in the aerosol generation device, the conductive material can electromagnetically interact with the conductive surface to have a first capacitance C0 therewith; the controller determining a change in capacitance of the electric circuit includes determining a change in capacitance of the electric circuit from the first capacitance C0 to a second capacitance C2; the controller is configured to evaluate the second capacitance C2 to indicate whether the aerosol product received by the aerosol generating device is of a predetermined type; An aerosol generating device, wherein a change in the capacitance of the electrical circuit is caused by a user either touching the aerosol product and further touching the conductive material or creating a capacitive coupling effect between the user and the conductive material.

2. The aerosol generating device of claim 1, wherein the controller is configured to compare the second capacitance C2 with a list of at least one predetermined value to indicate whether the aerosol product received by the aerosol generating device is of the predetermined type.

3. The aerosol generating device of claim 1 or 2, wherein the predetermined type is an approved item, and the controller is configured to enable the aerosol generating device when the second capacitance C2 indicates that the aerosol product received in the aerosol generating device is an approved item.

4. An aerosol generating device as described in any one of claims 1 to 3, wherein the specified type is an approved item, and the controller is configured to prevent use of the aerosol generating device when the second capacitance C2 indicates that the aerosol product received by the aerosol generating device is not an approved item.

5. The aerosol generating device of claim 1 or 2, wherein the controller is configured to enable the aerosol generating device when a change in capacitance of the electrical circuit is determined.

6. The aerosol generating device further comprises an aerosol product received in the aerosol generating device, 6. An aerosol generating device according to any one of claims 1 to 5, wherein the aerosol product received in the aerosol generating device comprises tobacco.

7. the conductive material has a plurality of connection portions including a first portion, a second portion, and a third portion; the second portion is a connection portion between the first portion and the third portion, The aerosol generating device of claim 1 , wherein the second portion is thinner than the first portion and the third portion.

8. A method for detecting a user's contact with an object inserted into a device according to any one of claims 1 to 7, comprising: detecting a change in capacitance of the electrical circuit from the first capacitance C0 to the second capacitance C2 when a user touches the item and either touches the conductive material or creates a capacitive coupling effect between the user and the conductive material; evaluating the second capacitance C2 to indicate whether the article received by the device is of a predetermined type; A method comprising:

9. comparing the second capacitance C2 to a list of at least one value; enabling the device when the second capacitance C2 corresponds to the at least one value; The method of claim 8 further comprising:

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