Temperature measuring device, temperature measuring method, and aerosol generating device

Abstract

A temperature measurement device includes a susceptor (11), a resonant circuit (12), and a controller (13), the susceptor (11) is coupled to the resonant circuit (12), a control end of the controller (13) is connected to switch units (S1, S2) of the resonant circuit (12), and the controller (13) is configured to control the switch units (S1, S2) to be conductive for a first time when controlling the resonant circuit (12) to a zero state, obtain electrical parameters of inductors (L1, L2) of the resonant circuit (12) at the first time, and determine the temperature of the susceptor (11) based on the electrical parameters of the inductors (L1, L2). Further, an aerosol generating device and a temperature measurement method are disclosed.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority to a Chinese patent application bearing application number 202310141205.0 and entitled "Temperature measuring device, temperature measuring method and aerosol generating device," filed with the China Patent Office on February 16, 2023, the entire contents of which are incorporated herein by reference.

[0002] This application relates to, but is not limited to, temperature measurement devices, temperature measurement methods, and aerosol generating devices. [Background technology]

[0003] Currently, common methods for determining susceptor temperature include wired and wireless temperature measurement. Wired temperature measurement involves attaching a temperature sensor to the susceptor, then connecting the generated electrical signal to a corresponding control circuit via a wire. The microcontroller in the control circuit then calculates the electrical signal to determine the susceptor temperature. Wireless temperature measurement methods mainly include temperature measurement methods based on the infrared light wave characteristics of the heating element and temperature measurement methods based on the apparent impedance of a class E power amplifier circuit. However, wired temperature measurement methods do not allow for the separation of the susceptor and the control circuit. Furthermore, wireless temperature measurement is subject to application restrictions and can only be applied to specific circuit configurations, resulting in limited applicability. Summary of the Invention

[0004] The present application provides a temperature measurement device, a temperature measurement method, and an aerosol generating device that can solve the problems in related art that the susceptor and the control circuit cannot be separated when measuring the temperature of the susceptor, which limits application and can only be applied to specific circuit configurations, and can improve the general applicability of the temperature measurement method.

[0005] The technical solution of the present application is realized as follows:

[0006] In a first aspect, embodiments of the present application provide a temperature measurement apparatus, the apparatus comprising: a susceptor; a resonant circuit; and a controller; the susceptor is coupled to the resonant circuit; a control end of the controller is connected to a switch unit of the resonant circuit; The controller is configured to, when controlling the resonant circuit to a zero state, control the switch unit to be conductive for a first time, acquire electrical parameters of an inductor in the resonant circuit during the first time, and determine the temperature of the susceptor based on the electrical parameters of the inductor.

[0007] In a second aspect, embodiments of the present application provide a method for measuring temperature, the method comprising: controlling a switch unit to be conductive when a resonant circuit coupled to a susceptor is in a zero state, and determining an electrical parameter of an inductor in the resonant circuit; and determining a temperature of the susceptor based on the electrical parameters of the inductor.

[0008] In the above temperature measurement method, the electrical parameters of the inductor include at least an inductance value of the inductor, and determining the electrical parameters of the inductor in the resonant circuit includes: determining a current value of the inductor in the resonant circuit and a voltage value of a power supply in the resonant circuit; determining an inductance value of the inductor based on a current value of the inductor and a voltage value of the power supply.

[0009] In a third aspect, an embodiment of the present application provides an aerosol-generating device, the aerosol-generating device comprising the temperature measuring device described above. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram illustrating a configuration of a temperature measuring device according to an embodiment of the present application. [Figure 2] FIG. 2 is a circuit schematic diagram of another temperature measurement device according to an embodiment of the present application. [Figure 3] FIG. 10 is a circuit schematic diagram of yet another temperature measurement device according to an embodiment of the present application. [Figure 4] FIG. 2 is a circuit schematic diagram of a temperature measuring device according to another embodiment of the present application. [Figure 5] FIG. 2 is a circuit schematic diagram of another temperature measurement device according to another embodiment of the present application. [Figure 6] 1 is an equivalent circuit diagram of a temperature measuring device according to an embodiment of the present application. [Figure 7] FIG. 2 is a circuit diagram showing the setting positions of target sampling points of a temperature measuring device according to an embodiment of the present application. [Figure 8] 3 is a control logic diagram of a switch unit of a temperature measuring device according to an embodiment of the present application; FIG. [Figure 9] 1 is a circuit diagram for measuring the current at the target sampling point of a temperature measuring device according to an embodiment of the present application; [Figure 10] FIG. 10 is a circuit schematic diagram for measuring the current at the target sampling point of another temperature measurement device according to an embodiment of the present application. [Figure 11] FIG. 10 is a schematic diagram illustrating the control logic of a switch unit of another temperature measuring device according to an embodiment of the present application. [Figure 12] FIG. 2 is a schematic diagram showing the current of an inductor of a temperature measuring device according to an embodiment of the present application. [Figure 13(a)] 1 is a circuit diagram of a wireless temperature measurement device according to an embodiment of the present application; [Figure 13(b)] FIG. 10 is a circuit schematic diagram of wireless temperature measurement of another temperature measurement device according to an embodiment of the present application. [Figure 13(c)] FIG. 10 is a circuit schematic diagram of wireless temperature measurement of yet another temperature measurement device according to an embodiment of the present application. [Figure 13(d)] FIG. 10 is a circuit diagram of a wireless temperature measurement device according to another embodiment of the present application. [Figure 14] 1 is a flowchart for determining the inductance value of an inductor in a temperature measurement device according to an embodiment of the present application. [Figure 15] 10 is a flowchart for determining an inductance value of an inductor of another temperature measurement device according to an embodiment of the present application. [Figure 16] 10 is a flowchart for determining an inductance value of an inductor in yet another temperature measurement device according to an embodiment of the present application. [Figure 17] 1 is a flowchart of a temperature measurement method according to an embodiment of the present application. [Figure 18] 10 is a flowchart of another method for measuring temperature according to an embodiment of the present application. [Figure 19] 10 is a flowchart of yet another method for measuring temperature according to an embodiment of the present application. [Figure 20(a)] 1 is a schematic diagram illustrating the basic principle of wireless temperature measurement of a temperature measurement method according to an embodiment of the present application; [Figure 20(b)] FIG. 2 is a schematic diagram illustrating the basic principle of another temperature measurement method according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0011] The following will clearly and completely describe the technical solutions of the embodiments of the present application with reference to the drawings of the embodiments of the present application.

[0012] An embodiment of the present application provides a temperature measurement device, and as shown in FIG. 1, the temperature measurement device includes a susceptor 11, a resonant circuit 12, and a controller 13; The susceptor 11 is coupled to a resonant circuit 12 .

[0013] Specifically, the resonant circuit 12 may be a parallel resonant circuit, a series resonant circuit, a single-transistor parallel resonant circuit, a half-bridge series resonant circuit, a full-bridge series resonant circuit, or a class E power amplifier resonant circuit. Of course, the resonant circuit 12 may be any other type of resonant circuit. Note that the resonant circuit 12 does not have a unique configuration. Typically, the resonant circuit 12 may include a capacitor and an inductor, and the capacitor and the inductor may be connected in parallel or in series. A circuit in which a capacitor and an inductor are connected in parallel is called a parallel resonant circuit, and a circuit in which a capacitor and an inductor are connected in series is called a series resonant circuit.

[0014] In the embodiment of the present application, as shown in Fig. 2, the parallel resonant circuit may be a circuit composed of a capacitor C1, a capacitor C2, a switch unit S1, an inductor coil L1, and a susceptor 11, and specific connections between the capacitor C1, the capacitor C2, the switch unit S1, the inductor coil L1, and the susceptor 11 can be seen in Fig. 2. Similarly, as shown in Fig. 3, the series resonant circuit may be a circuit composed of a capacitor C1, a capacitor C2, a switch unit S1, a switch unit S2, an inductor L1, and a susceptor 11, and specific connections between the capacitor C1, the capacitor C2, the switch unit S1, the switch unit S2, the inductor L1, and the susceptor 11 can be seen in Fig. 3. Alternatively, as shown in FIG. 4, the series resonant circuit may be a circuit composed of capacitors C1, C2, C3, switch units S1, S2, inductor L1, and susceptor 11, and FIG. 4 may be referred to for specific connections between capacitors C1, C2, C3, switch units S1, S2, inductor L1, and susceptor 11. Alternatively, as shown in FIG. 5, the series resonant circuit may be a circuit composed of capacitors C1, C2, Cp, switch unit S1, inductor L1, inductor L2, and susceptor 11, and FIG. 5 may be referred to for specific connections between capacitors C1, C2, Cp, switch unit S1, inductor L1, and susceptor 11.

[0015] Here, coupling connection means that the susceptor 11 and the resonant circuit 12 are not directly connected, and when the parameters in the susceptor 11 change, the electrical parameters in the resonant circuit 12 also change correspondingly, or when the electrical parameters in the resonant circuit 12 change, the parameters in the susceptor 11 also change correspondingly, thereby enabling non-contact temperature measurement between the susceptor 11 and the resonant circuit 12.

[0016] The control terminal of the controller 13 is connected to the switch unit of the resonant circuit 12 .

[0017] The controller 13 is configured to, when controlling the resonant circuit 12 to the zero state, control the switch unit to be conductive for only a first time, acquire electrical parameters of the inductor in the resonant circuit 12 during the first time, and determine the temperature of the susceptor 11 based on the electrical parameters of the inductor.

[0018] In the present embodiment, the resonant circuit 12 further includes a switch unit, and the controller 13 can control the switch unit in the resonant circuit 12 via a control terminal. For example, assuming the resonant circuit 12 is the parallel resonant circuit shown in FIG. 1, the controller 13 periodically turns on and off the switch unit S1 in the resonant circuit 12 via the control terminal, causing L1 and C2 in the resonant circuit 12 to operate in a resonant state. The periodic AC current in L1 generates an AC magnetic field, which causes the susceptor 11 to generate eddy currents through electromagnetic induction. The eddy currents then generate Joule heat, thereby achieving the purpose of induction heating using the parallel resonant circuit. Note that when the switch unit S1 in the parallel resonant circuit shown in FIG. 2 is in an off state, the current in the inductor L1 is zero, and the voltage across the capacitor C2 is zero, i.e., L1 and C2 are in a "zero state." On the other hand, when the switch unit S1 in the parallel resonant circuit shown in Figure 2 is in the closed state, the resistance of S1 itself when S1 is conductive is much smaller than the equivalent resistance formed by the combination of the inductor and the susceptor. Therefore, the resistance of S1 can be almost ignored, and the voltage across the capacitor C2 can indicate the voltage across the power supply. Therefore, the parallel resonant circuit shown in Figure 2 can be equivalent to a resistor-inductor circuit, i.e., an RL circuit, shown in Figure 6, where the resistor R1 in the RL circuit is the equivalent resistance formed by the combination of the inductor and the susceptor, and the inductor Lr is the equivalent inductance formed by the combination of the inductor and the susceptor.

[0019] The first time is t on The first time is usually on the order of microseconds (us), and the electrical parameter of the inductor may refer to the inductance value of the inductor. When the controller 13 controls the resonant circuit 12 to the zero state, the controller 13 controls the switch unit to on Conduction is only t on The inductance value of the inductor in the resonant circuit 12 can be obtained, and the temperature of the susceptor can be determined based on the correspondence between the inductance value of the inductor and the temperature of the susceptor.

[0020] Specifically, the controller 13 is configured to acquire the current value of the target sampling point in the resonant circuit 12 and the voltage value of the power supply in the resonant circuit 12, determine the inductance value of the inductor based on the current value of the inductor in the resonant circuit 12 and the voltage value of the power supply, and determine the temperature of the susceptor 11 based on the inductance value of the inductor.

[0021] Here, the current value at the target sampling point is used to represent the current value of the inductor.

[0022] In the embodiment of the present application, multiple target sampling points are set in the resonant circuit 12, and the inductor current value can be obtained by acquiring the current values ​​at the target sampling points. As one possible implementation, a case in which multiple target sampling points are set in the parallel resonant circuit shown in FIG. 2 will be described as an example. The target sampling points can be set at various locations, as shown in FIG. 7. Specifically, the target sampling point, i.e., target sampling point 1 (i.e., inductor current sampling point 1), can be set at both ends of the capacitor C1; target sampling points, i.e., target sampling point 2 (i.e., inductor current sampling point 2) and target sampling point 3 (i.e., inductor current sampling point 3), can be set at both ends of the inductor L1; target sampling points, i.e., target sampling point 4 (i.e., inductor current sampling point 4) and target sampling point 5 (i.e., inductor current sampling point 5), can be set at both ends of the switch unit S1; and of course, target sampling points can be set at other locations in the parallel resonant circuit. The inductor current value can be determined from the current value acquired at any target sampling point.

[0023] Specifically, the inductance value of the inductor can refer to an equivalent inductance value, and the controller 13 can obtain the equivalent inductance value by performing calculations on the current value of the inductor and the voltage value of the power supply, and determine the temperature of the susceptor 11 based on the correspondence between the equivalent inductance value and the susceptor.

[0024] In another embodiment of the present application, the switch unit is further configured to be periodically turned on for a second time period to control the susceptor 11 to generate a heating current.

[0025] Specifically, the second time period is typically on the order of milliseconds, and when the switch unit is turned on periodically during the second time period, the susceptor 11 can generate a heating current, allowing the switch unit to be used for both heating control and temperature measurement. In this case, the control logic of the switch unit can be seen in FIG. 8, and the switch unit can be controlled to be turned on for a first time period (i.e., the time period during which the switch unit controls temperature measurement) and for a second time period (i.e., the time period during which the switch unit controls heating). The second time period is different from the first time period.

[0026] Specifically, the controller 13 is configured to control the temperature measurement control switch to conduct for a first time when the heating control switch is turned off and the resonant circuit 12 is in a zero state, and to acquire the current value of the inductor in the resonant circuit 12 during the first time.

[0027] Although there are various methods for measuring the inductor current, considering the cost and volume of the aerosol generating device, the inductor current is usually measured using a resistive shunt (i.e., a sampling resistor connected in series to the circuit). In the circuit diagram shown in Figure 7, the method for measuring the current values ​​at target sampling points 2 and 3 consumes a lot of power because the sampling resistor Rs is always connected, whether during heating or temperature measurement. On the other hand, the method for measuring the current values ​​at target sampling points 1, 4, and 5 consumes a relatively small amount of power because the sampling resistor Rs is connected only when S1 is conducting.

[0028] In one preferred embodiment, taking the case where the current values ​​at target sampling point 4 and target sampling point 5 are measured using a resistive shunt circuit, the circuit configuration shown in FIG. 9 can be formed by adding a sampling resistor Rs and a heating control switch S2 to the circuit shown in FIG. 2 at a position corresponding to target sampling point 4 in order to reduce the additional energy consumption of the resistive shunt during measurement. Of course, the circuit shown in FIG. 10 can also be formed by adding a sampling resistor Rs and a heating control switch S2 to the circuit shown in FIG. 2 at a position corresponding to target sampling point 5. Here, both the circuits shown in FIG. 9 and FIG. 10 are composed of a capacitor C1, a capacitor C2, a temperature measurement control switch S1, a heating control switch S2, a sampling resistor Rs, an inductor L1, and a susceptor. In one possible embodiment, in the circuit diagram shown in FIG. 9, if the controller 13 controls S2 to be turned off and S1 to be turned on for a first time, the current value at target sampling point 4 during the first time can be obtained, thereby obtaining the current value of the inductor. In another possible implementation, in the circuit diagram shown in FIG. 10, if the controller 13 controls S2 to be cut off and S1 to be conductive for only a first time, the current value of the target sampling point 5 within the first time can be obtained, thereby obtaining the current value of the inductor.

[0029] Specifically, the control logic of the switch unit can be seen in Figure 11, where the heating control switch is periodically controlled to be conductive for a second time period, and the temperature measurement control switch is controlled to be conductive for a first time period. The waveform diagram when the temperature measurement control switch is conductive for the first time period and the current waveform diagram of the inductor in the resonant circuit 12 during the first time period can be seen in Figure 12. As shown in Figure 12, the temperature measurement control switch S1 is turned on for the first time period t on When only the inductor is conductive, the current value of the inductor changes almost linearly, and the amount of change in the inductor current between the first measurement time t0 and the second measurement time t1 is I.

[0030] In addition, in a method of implementing wireless temperature measurement by adding a control switch unit to short-circuit the capacitor to form an RL circuit, referring to the circuit diagrams shown in Figures 13(a), 13(b), 13(c), and 13(d), it is possible to implement wireless temperature measurement by controlling the switch unit to form an RL circuit. Here, when implementing wireless temperature measurement using the circuit diagram shown in Figure 13(a), the switch units S0 and S1 can be controlled to a closed state. When implementing wireless temperature measurement using the circuit diagram shown in Figure 13(b), the switch units S0 and S1 can be controlled to a closed state. When implementing wireless temperature measurement using the circuit diagram shown in Figure 13(c), the switch units S0 and S2 can be controlled to a closed state. When implementing wireless temperature measurement using the circuit diagram shown in Figure 13(d), the switch unit S0 can be controlled to a closed state and the switch unit S1 can be controlled to an open state.

[0031] In one embodiment of the present application, when the conduction time (i.e., the first time) of the switch unit is preset based on past experience (i.e., the first time is a known amount), the controller 13 is specifically configured to receive the first current value, the second current value, and the voltage value of the power supply collected by the sampling unit.

[0032] Specifically, the controller 13 is configured to determine an inductance value of the inductor based on the first current value, the second current value, the first time, the voltage value of the power supply, and the resistance value of the resistor in the resonant circuit 12 in accordance with the zero-state response of the resonant circuit 12, and to determine the temperature of the susceptor 11 based on the inductance value of the inductor.

[0033] Here, the first time is determined based on the first measurement time and the second measurement time.

[0034] Specifically, the current value of the inductor can be obtained by collecting current values ​​at target sampling points through a sampling unit, where the first current value is the current value at the target sampling point at a first measurement time collected by the sampling unit, and the second current value is the current value at the target sampling point at a second measurement time collected by the sampling unit. In one possible implementation, the sampling unit may be referred to as an A / D sampling unit or a microprogrammed control unit (MCU).

[0035] Specifically, the first measurement time and the second measurement time are preset based on experimental data, and the first time can be obtained by performing a mathematical logic operation on the predetermined first measurement time and the predetermined second measurement time, where the first measurement time can be represented as t0 and the second measurement time can be represented as t1. Then, based on the zero-state response of the resonant circuit 12, a mathematical logic operation is performed on the first current value, the second current value, the first time, the voltage value of the power supply, and the resistance value of the resistor in the resonant circuit 12 to obtain the inductance value of the inductor. In one possible implementation, the first time can be obtained by calculating the difference between the predetermined first measurement time and the predetermined second measurement time.

[0036] When the conduction time of the switch unit (i.e., the first time) is preset based on past experimental data, the specific process by which the controller 13 determines the current value of the inductor can be seen in FIG. 14. When the switch unit is conducting for only the first time, the controller 13 can gradually increase the first measurement time. When the controller 13 detects that the first measurement time has not reached the second measurement time, the controller 13 continues to increase the first measurement time. When the controller 13 detects that the first measurement time has reached the second measurement time, the controller 13 triggers the sampling unit to collect the second current value at the second measurement time and the voltage value of the power supply. Then, the sampling unit performs a mathematical logic operation on the first current value, the second current value, the first time, the voltage value of the power supply, and the resistance value of the resistor in the resonant circuit 12 according to the inductor calculation formula to obtain the inductance value of the inductor.

[0037] In another embodiment of the present application, when the current value of the target sampling point is preset based on past experimental data (i.e., the predetermined current value is a known quantity), the controller 13 is specifically configured to obtain the predetermined current value in the resonant circuit 12 and receive the voltage value of the power supply collected by the sampling unit.

[0038] Specifically, the controller 13 is configured to determine an inductance value of the inductor based on a predetermined current value, a first time, a voltage value of the power supply, and a resistance value of the resistor in the resonant circuit 12 in accordance with the zero-state response of the resonant circuit 12, and to determine the temperature of the susceptor 11 based on the inductance value of the inductor.

[0039] Here, the first time is determined based on the first measurement time and the second measurement time, and the second measurement time is the time determined when the sampling unit starts collecting the current value of the target sampling point from the first measurement time and the collected current value meets the predetermined current value.

[0040] In one possible implementation, when the predetermined current value of the target sampling point is known, the specific process of the controller determining the inductor current value can be seen in Figure 15. The controller 13 can gradually increase the first measurement time when the switch unit is conducting for a first time. At this time, the controller 13 triggers the sampling unit to start collecting the current value of the target sampling point through a software trigger. If the current value of the target sampling point does not meet the predetermined current value, the controller 13 continues to collect the current value of the target sampling point. If the current value of the target sampling point meets the predetermined current value, the controller 13 stops increasing the first measurement time. The sampling unit then collects the time in a software manner to obtain a second measurement time and collects the voltage value of the power supply. Then, when the predetermined current value I is reached and the first time t on , the power supply voltage value V in , and the resistance value R1 of the resistor in the resonant circuit is calculated using the inductor calculation formula Substitute into TIFF2026505199000002.tif22170 and perform the calculation to obtain the inductance value of the inductor.

[0041] In another possible implementation, when the predetermined current value at the target sampling point is known, the specific process of the controller 13 determining the inductor current value can also be seen in Figure 16. The controller 13 can gradually increase the first measurement time when the switch unit is conductive for a first time. At this time, the inductor current signal and the predetermined current value are compared by a hardware comparator circuit. If the current value at the target sampling point does not meet the predetermined current value, the hardware comparator does not output a sampling trigger signal and continues to increase the first measurement time. If the current value at the target sampling point meets the predetermined current value, the hardware comparator outputs a sampling trigger signal and stops increasing the first measurement time. The sampling unit then collects a second measurement time corresponding to the predetermined current value in a software manner and collects the voltage value of the power supply. Then, the sampling unit collects the predetermined current value I, the first time t on , the power supply voltage value V in , and the resistance value R1 of the resistor in the resonant circuit is calculated using the inductor calculation formula Substitute into TIFF2026505199000003.tif22170 and perform the calculation to obtain the inductance value of the inductor.

[0042] The temperature measurement device provided in the embodiment of the present application electromagnetically couples the susceptor and the resonant circuit and determines the susceptor temperature using a wireless temperature measurement method, thereby separating the susceptor from the resonant circuit and solving the problem of the related art in which the susceptor cannot be separated from the control circuit. Furthermore, when the resonant circuit is in the zero state, it is equivalent to a resistor-inductor circuit, and the electrical parameters of the inductor in the resonant circuit are obtained during the first time period when the switch unit is conductive. That is, by determining the susceptor temperature using the resistor-inductor circuit, the inductor and capacitor in the resonant circuit can be decoupled, thereby reducing the constraints on the susceptor temperature determination process and improving the versatility of the temperature measurement method.

[0043] An embodiment of the present application provides an aerosol-generating device, the aerosol-generating device comprising a temperature measuring device corresponding to FIG.

[0044] An embodiment of the present application provides a temperature measurement method applicable to a temperature measurement device, and as shown in FIG. 17, the method includes the following steps:

[0045] In step 101, when the resonant circuit coupled to the susceptor is in a zero state, the switch unit is controlled to be conductive, and the electrical parameters of the inductor in the resonant circuit are determined.

[0046] Here, the electrical parameter of the inductor can refer to the inductance value of the inductor.

[0047] In the present embodiment, when the resonant circuit 12 coupled to the susceptor 11 is in the zero state, the switch unit is controlled to be conductive for a first time, thereby first obtaining the current value of the inductor in the resonant circuit 12 and the voltage value of the power supply in the resonant circuit 12, and then obtaining the inductance value of the inductor for the first time based on the current value of the inductor and the voltage value of the power supply in the resonant circuit 12. Here, the resonant circuit 12 is equivalent to an RL circuit based on the circuit equivalent principle, and the electrical parameters of the inductor can be determined based on the equivalent circuit. Note that the controller 13 further controls the switch unit to be conductive periodically for a second time, thereby controlling the susceptor 11 to generate a heating current and heat the susceptor 11.

[0048] In step 102, the temperature of the susceptor is determined based on the electrical parameters of the inductor.

[0049] In the embodiment of the present application, the temperature of the susceptor 11 can be determined based on the electrical parameters of the inductor and the correspondence between the electrical parameters of the inductor and the temperature of the susceptor 11 .

[0050] In the temperature measurement method provided in the embodiment of the present application, when the resonant circuit coupled to the susceptor is in a zero state, the switch unit is controlled to be conductive, and the electrical parameters of the inductor in the resonant circuit are determined. The temperature of the susceptor is then determined based on the electrical parameters of the inductor. By coupling the susceptor and the resonant circuit, the susceptor and the resonant circuit are decoupled, solving the problem in the related art of not being able to separate the susceptor from the control circuit. Furthermore, when the resonant circuit is in a zero state, the resonant circuit is equivalent to a resistor-inductor circuit. At this time, the electrical parameters of the inductor in the resonant circuit are obtained during the first time period when the switch unit is conductive. That is, by determining the susceptor temperature using the resistor-inductor circuit, the inductor and capacitor in the resonant circuit can be decoupled, thereby reducing constraints on the process of determining the susceptor temperature and improving the versatility of the temperature measurement method.

[0051] Based on the above embodiment, an embodiment of the present application provides a temperature measurement method applied to a temperature measurement device, and as shown in FIG. 18, the method includes the following steps:

[0052] In step 201, when the resonant circuit coupled to the susceptor is in a zero state, the switch unit is controlled to be conductive, and the current value of the inductor in the resonant circuit and the voltage value of the power supply in the resonant circuit are determined.

[0053] In the embodiment of the present application, when the resonant circuit 12 is in a zero state and the control switch unit is controlled to be conductive, the current value of the inductor in the resonant circuit 12 can be obtained by collecting the current value of the target sampling point in the resonant circuit 12 by the collection unit, and the voltage value of the power supply in the resonant circuit 12 can be collected by the collection unit.

[0054] Step 201 can be realized by the following method.

[0055] In step 201a, the current value of the target sampling point in the resonant circuit is determined to obtain the current value of the inductor, and the voltage value of the power supply is determined by the sampling unit.

[0056] Here, the target sampling point is the sampling point associated with the inductor.

[0057] In the embodiment of the present application, the current value of the inductor can be expressed using the current value of the target sampling point, for the following reason: In the circuit diagram shown in Fig. 7, the current values ​​at target sampling point 2 and target sampling point 3 are the current flowing through the inductor, and the current values ​​at target sampling point 1, target sampling point 4, and target sampling point 5 are the current flowing through the entire resonant circuit 12 (i.e., the sum of the currents at the inductor and the capacitor), but the capacitor only has an instantaneous charging current value near time 0, and after charging is complete, the current at both ends of the capacitor becomes 0 and the current at the entire resonant circuit becomes equal to the current at both ends of the inductor, so the current value of the inductor can be expressed using the current value at the target sampling point.

[0058] In the present embodiment, circuit formats such as a current transformer, a Hall sensor, or a resistive shunt may be employed to measure the current value at the target sampling point in the circuit diagram shown in FIG.

[0059] In step 202, an inductance value of the inductor is determined based on the current value of the inductor and the voltage value of the power supply.

[0060] In the embodiment of the present application, a mathematical logic operation is performed on the current value of the inductor and the voltage value of the power supply to obtain the inductance value of the inductor.

[0061] Step 202 can be realized by the following method.

[0062] In step 202b1, the resistance value of the resistor in the resonant circuit is determined.

[0063] In the present embodiment, the resistance value of the resistor in the resonant circuit 12 is a constant related to the resistance value formed by the combination of the susceptor 11 and the inductor, and the resistance value of the resistor can be calculated from experimental test data. Note that the resistance in the resonant circuit 12 is an equivalent resistance.

[0064] In step 202b2, an inductance value is determined based on the inductor current value, the power supply voltage value, the first time, and the resistance value.

[0065] In the embodiment of the present application, a first logical operation is performed on a first time and a resistance value, and a second logical operation is performed on an inductor current value, a power supply voltage value, and a resistance value, and then the inductance value of the inductor is obtained based on the result of the first logical operation and the result of the second logical operation. Alternatively, the result of the second logical operation may be processed first, and the inductance value of the inductor may be jointly determined based on the result of the second logical operation after processing and the result of the first logical operation.

[0066] In step 203, a correspondence between inductance values ​​and temperatures is determined.

[0067] In the embodiment of the present application, the correspondence between the inductance value of the inductor and the temperature of the susceptor 11 may be preset based on experimental data, and the preset correspondence may be stored in the controller 13. In one possible implementation, when the inductance value of the inductor is L1, the corresponding temperature of the susceptor 11 is T1; when the inductance value of the inductor is L2, the corresponding temperature of the susceptor 11 is T2; and when the inductance value of the inductor is L3, the corresponding temperature of the susceptor 11 is T3.

[0068] In step 204, the temperature of the susceptor is determined based on the correspondence between the inductance value and the temperature and the inductance value of the inductor.

[0069] In the embodiment of the present application, after determining the inductance value of the inductor, the temperature corresponding to the inductance value of the inductor is searched for in the correspondence relationship stored in the controller 13 to obtain the temperature of the susceptor 11, thereby realizing wireless detection of the susceptor temperature. In one possible implementation form, the correspondence relationship can be stored in a list format.

[0070] In the temperature measurement method provided in the embodiments of the present application, the susceptor and the resonant circuit are coupled together, thereby isolating the susceptor from the resonant circuit and solving the problem in the related art that the susceptor cannot be separated from the control circuit. Furthermore, when the resonant circuit is in the zero state, it is equivalent to a resistor-inductor circuit, and the electrical parameters of the inductor in the resonant circuit are obtained during the first time period when the switch unit is conductive. That is, by determining the susceptor temperature using the resistor-inductor circuit, the inductor and capacitor in the resonant circuit can be decoupled, thereby reducing the constraints on the susceptor temperature determination process and improving the versatility of the temperature measurement method.

[0071] Based on the above embodiment, an embodiment of the present application provides a temperature measurement method applied to a temperature measurement device, and as shown in FIG. 19, the method includes the following steps:

[0072] In step 301, the voltage value of the power supply is determined by a sampling unit.

[0073] If the first measurement time and the second measurement time are set in advance, steps 302 to 304 can be executed after step 301, and if the predetermined current value of the target sampling point is set in advance, steps 305 to 307 can be executed after step 301.

[0074] In step 302, a first measurement time and a second measurement time are determined.

[0075] In the present embodiment, the first measurement time and the second measurement time can be set in advance based on experimental data.

[0076] In step 303, at a first measurement time, a first current value is collected by the sampling unit, and when the time reaches a second measurement time, a second current value is collected by the sampling unit.

[0077] In the embodiment of the present application, during a first measurement time, the collection unit collects a first current value of the inductor during the first measurement time, and then gradually increases the first measurement time. When the first measurement time increases to a second measurement time, the collection unit collects a second current value of the inductor during the second measurement time. In one possible implementation, the first measurement time may be gradually increased with a fixed step length, or the first measurement time may be gradually increased in other ways.

[0078] In step 304, a current value for the inductor is determined based on the first current value and the second current value.

[0079] In an embodiment of the present application, a mathematical logic operation can be performed on the first current value and the second current value to obtain a current value of the inductor, where the first current value can be represented by I1 and the second current value can be represented by I2. In one possible implementation, the current value of the inductor can be obtained by I2-I1, where if the first current value corresponding to the first measurement time is 0, the current value of the inductor is the second current value corresponding to the second measurement time.

[0080] In step 305, a predetermined current value at a target sampling point in the resonant circuit is obtained to obtain a current value of the inductor.

[0081] In the present embodiment, the current value of the target sampling point (i.e., the predetermined current value) can be preset based on experimental data, that is, the predetermined current value of the target sampling point is known, and therefore the current value of the inductor can be obtained.

[0082] In step 306, a first measurement time is determined.

[0083] In the present embodiment, the first measurement time can be preset based on experimental data, i.e., the first measurement time is known.

[0084] In step 307, the sampling unit continuously collects the current value of the target sampling point, and when the collected current value meets the predetermined current value, the sampling unit determines a second measurement time corresponding to when the collected current value meets the predetermined current value.

[0085] In the embodiment of the present application, the first measurement time can be gradually increased. At this time, the controller 13 uses a software trigger to cause the sampling unit to continuously collect the current value of the target sampling point. If the current value of the target sampling point does not meet the predetermined current value, the controller 13 continues to increase the first measurement time and continue to collect the current value of the target sampling point. If the current value of the target sampling point meets the predetermined current value, the controller 13 stops increasing the first measurement time and causes the sampling unit to collect the second measurement time corresponding to the predetermined current value.

[0086] After steps 303-304 and steps 305-307, step 308 can be executed.

[0087] In step 308, a first time is determined based on the first measured time and the second measured time.

[0088] In an embodiment of the present application, a mathematical logic operation can be performed on the first measured time and the second measured time to obtain a first time, where the first measured time can be represented as t1 and the second measured time can be represented as t2. In one possible implementation, the first time can be obtained by t2-t1.

[0089] In step 309, the resistance of the resistor in the resonant circuit is determined.

[0090] In step 310, at a first time, a calculation is performed on the current value of the inductor, the voltage value of the power supply, and the resistance value to obtain an inductance value.

[0091] In an embodiment of the present application, a calculation is performed on the difference between the first measurement time and the second measurement time (i.e., the first time) and the resistance value of the resistor to obtain a first value, then a calculation is performed on the difference between the first current value and the second current value, the voltage value, and the resistance value of the resistor to obtain a second value, and then the second value is processed and a calculation is performed on the first value and the processed second value to obtain an inductance value of the inductor. In one possible implementation, the following Equation 1 is employed to perform a calculation on the current value of the inductor, the voltage value of the power supply, the first time, and the resistance value to obtain an inductance value of the inductor.

[0092] TIFF2026505199000004.tif24170 where L r represents the inductor in the resonant circuit 12, and t on represents the first time, R1 represents the resistance in the resonant circuit 12, I represents the current in the inductor, and V in represents the voltage of the power supply. In this embodiment, the first time is set in advance based on experimental data and is a known amount.

[0093] Equation 1 is based on the fact that the switch unit S1 in the parallel resonant circuit shown in FIG. 2 has a pulse width of t on Applying a control signal of , then analyzing the zero-state response of the RL circuit, we obtain the inductor Lr equation. Note that Equation 1 is derived from Equation 2 and Equation 3 in the zero-state response, where Equation 2 and Equation 3 are as follows:

[0094] TIFF2026505199000005.tif23170TIFF2026505199000006.tif23170Where, TIFF2026505199000007.tif10170 is the inductor current value at time t.

[0095] In step 311, a correspondence between inductance values ​​and temperatures is determined.

[0096] In step 312, the temperature of the susceptor is determined based on the correspondence between the inductance value and the temperature and the inductance value of the inductor.

[0097] In another embodiment of the present application, the temperature of the susceptor 11 can be determined based on the correspondence between the inductance value and the temperature and the inductance value of the inductor.

[0098] In another possible implementation, as shown in Figure 20(a), when the temperature of the susceptor 11 changes, the magnetic permeability Ur of the susceptor 11 also changes accordingly, and the change in the magnetic permeability of the susceptor 11 causes a change in the equivalent inductance Lr formed by the combination of the susceptor 11 and the inductor. That is, the change in the temperature of the susceptor 11 is reflected in the equivalent inductance Lr. Therefore, as shown in Figure 20(b), the relevant detection is performed according to the above scheme, and the equivalent inductance Lr is calculated based on the detection result. Then, the magnetic permeability Ur of the susceptor 11 is obtained based on the relationship between the equivalent inductance Lr and the magnetic permeability Ur of the susceptor 11. Then, the temperature of the susceptor 11 can be obtained based on the relationship between the magnetic permeability Ur and the susceptor temperature.

[0099] In the temperature measurement method provided in the embodiments of the present application, the susceptor and the resonant circuit are coupled together, thereby isolating the susceptor from the resonant circuit and solving the problem in the related art that the susceptor cannot be separated from the control circuit. Furthermore, when the resonant circuit is in the zero state, it is equivalent to a resistor-inductor circuit, and the electrical parameters of the inductor in the resonant circuit are obtained during the first time period when the switch unit is conductive. That is, by determining the susceptor temperature using the resistor-inductor circuit, the inductor and capacitor in the resonant circuit can be decoupled, thereby reducing the constraints on the susceptor temperature determination process and improving the versatility of the temperature measurement method.

[0100] As can be understood, in this embodiment, a "unit" may be a part of a circuit, a part of a processor, a part of a program, software, etc., and may of course be a module or a non-module. Furthermore, each component in this embodiment may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be realized in the form of hardware or in the form of a software functional module.

[0101] If the integrated unit is realized in the form of a software functional module and is not sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essential part of the technical solution of this embodiment, i.e., the part that contributes to the prior art, or all or part of the solution of the technology, can be embodied in the form of a software product, and the computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) or a processor to execute all or part of the steps of the method described in this embodiment. The storage medium includes various media that can store program code, such as a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0102] The above are only preferred embodiments of the present application, and do not limit the scope of protection of the present application.

[0103] It should be noted that, in this application, the terms "comprise," "include," or any other variation thereof, are intended to be non-exclusive inclusive, meaning that a process, method, article, or apparatus that includes a set of elements includes not only those elements but also other elements not expressly listed or inherent elements of such process, method, article, or apparatus. Unless otherwise limited, an element defined as "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0104] The numbers of the above-mentioned embodiments of the present application are merely for the purpose of explanation and do not represent the superiority or inferiority of the embodiments.

[0105] The methods disclosed in the several method embodiments provided herein can be combined in any manner consistent with one another to obtain new method embodiments.

[0106] The features disclosed in the several product embodiments provided herein may be combined in any manner consistent with one another to obtain new product embodiments.

[0107] The features disclosed in any method or apparatus embodiment provided herein may be combined in any non-consistent manner to obtain new method or apparatus embodiments.

[0108] The above content is merely a specific embodiment of the present application, and the protection scope of the present application is not limited thereto. Any modifications or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims. [Industrial Applicability]

[0109] In the temperature measuring device, temperature measuring method, and aerosol generating device provided in the embodiments of the present application, a susceptor is coupled to a resonant circuit, and the control terminal of a controller is connected to a switch unit of the resonant circuit. When the controller controls the resonant circuit to a zero state, it controls the switch unit to be conductive for a first time, obtains electrical parameters of an inductor in the resonant circuit during the first time, and determines the temperature of the susceptor based on the electrical parameters of the inductor. By coupling the susceptor to the resonant circuit, the susceptor and the resonant circuit are separated, solving the problem in the related art that the susceptor cannot be separated from the control circuit. Furthermore, when the resonant circuit is in the zero state, the resonant circuit is equivalent to a resistor-inductor circuit, and the electrical parameters of the inductor in the resonant circuit during the first time when the switch unit is conductive are obtained. That is, by determining the susceptor temperature using the resistor-inductor circuit, the inductor and capacitor in the resonant circuit can be decoupled, thereby reducing constraints on the process of determining the susceptor temperature and improving the versatility of the temperature measurement method.

Claims

1. A temperature measurement device comprising: a susceptor; a resonant circuit; and a controller; the susceptor is coupled to the resonant circuit; a control end of the controller is connected to a switch unit of the resonant circuit; The temperature measuring device is configured such that, when the controller controls the resonant circuit to a zero state, the controller controls the switch unit to be conductive for a first time, acquires electrical parameters of an inductor in the resonant circuit during the first time, and determines the temperature of the susceptor based on the electrical parameters of the inductor.

2. the electrical parameters include at least an inductance value; The controller is specifically configured to obtain a current value of a target sampling point in the resonant circuit and a voltage value of a power supply in the resonant circuit, determine an inductance value of the inductor based on the current value of an inductor in the resonant circuit and the voltage value of the power supply, and determine a temperature of the susceptor based on the inductance value of the inductor, wherein the current value of the target sampling point is used to represent the current value of the inductor. The temperature measurement device according to claim 1 .

3. The switch unit is configured to be turned on for a second time period to control the susceptor to generate a heating current. The temperature measurement device according to claim 1 .

4. the switch unit includes a heating control switch and a temperature measurement control switch; Specifically, the controller is configured to control the temperature measurement control switch to be conductive for a first time when the heating control switch is cut off and the resonant circuit is in a zero state, and to acquire a current value of an inductor in the resonant circuit during the first time. The temperature measurement device according to claim 1 .

5. the current values ​​of the target sampling points include a first current value of the target sampling points at a first measurement time and a second current value of the target sampling points at a second measurement time; The controller is specifically configured to receive the first current value, the second current value, and the voltage value of the power supply collected by the sampling unit; Specifically, the controller is configured to determine an inductance value of the inductor based on the first current value, the second current value, a first time, a voltage value of the power supply, and a resistance value of a resistor in the resonant circuit in response to a zero-state response of the resonant circuit, and to determine a temperature of the susceptor based on the inductance value of the inductor, and the first time is determined based on the first measurement time and the second measurement time. The temperature measuring device according to claim 2 .

6. the current value of the target sampling point includes a predetermined current value of the target sampling point; The controller is specifically configured to obtain the predetermined current value in the resonant circuit and receive the voltage value of the power supply collected by the sampling unit; Specifically, the controller is configured to determine an inductance value of the inductor based on the predetermined current value, a first time, a voltage value of the power supply, and a resistance value of a resistor in the resonant circuit according to a zero-state response of the resonant circuit, and to determine a temperature of the susceptor based on the inductance value of the inductor, wherein the first time is determined based on a first measurement time and a second measurement time, and the second measurement time is a time determined when the sampling unit collects current values ​​of the target sampling points from the first measurement time and the collected current values ​​meet the predetermined current value. The temperature measuring device according to claim 2 .

7. An aerosol generating device comprising the temperature measuring device according to any one of claims 1 to 6.

8. A temperature measurement method, which is applied to the temperature measurement device according to any one of claims 1 to 6, controlling a switch unit to be conductive when a resonant circuit coupled to a susceptor is in a zero state, and determining an electrical parameter of an inductor in the resonant circuit; and determining a temperature of the susceptor based on an electrical parameter of the inductor.

9. The electrical parameters of the inductor include at least an inductance value of the inductor, and determining the electrical parameters of the inductor in the resonant circuit includes: determining a current value of the inductor in the resonant circuit and a voltage value of a power supply in the resonant circuit; determining an inductance value of the inductor based on a current value of the inductor and a voltage value of the power supply; The temperature measurement method according to claim 8.

10. Determining the current value of the inductor and the voltage value of the power supply in the resonant circuit includes: determining a current value of a target sampling point in the resonant circuit to obtain a current value of the inductor; and determining a voltage value of the power supply by a sampling unit, wherein the target sampling point is a sampling point associated with the inductor; The temperature measurement method according to claim 9.

11. The current values ​​of the target sampling points include a first current value of the target sampling points at a first measurement time and a second current value of the target sampling points at a second measurement time, and determining the current values ​​of the target sampling points in the resonant circuit to obtain the current values ​​of the inductor includes: determining a first measurement time and a second measurement time; collecting the first current value by a sampling unit at the first measurement time, and collecting the second current value by the sampling unit when time reaches the second measurement time; determining a current value of the inductor based on the first current value and the second current value. The temperature measurement method according to claim 10.

12. The current value of the target sampling point includes a predetermined current value of the target sampling point, and determining the current value of the target sampling point in the resonant circuit to obtain the current value of the inductor includes: obtaining a predetermined current value at a target sampling point in the resonant circuit to obtain a current value of the inductor; The temperature measurement method according to claim 10.

13. Determining an inductance value of the inductor based on a current value of the inductor and a voltage value of the power supply includes: determining a resistance value of a resistor in the resonant circuit; determining the inductance value based on a current value of the inductor, a voltage value of the power supply, a first time, and the resistance value; The temperature measurement method according to claim 11 or 12.

14. determining the inductance value based on the current value of the inductor, the voltage value of the power source, a first time, and the resistance value; determining the first time based on a first measured time and a second measured time; performing a calculation on the first time period, the current value of the inductor, the voltage value of the power supply, and the resistance value to obtain the inductance value; The temperature measurement method according to claim 13.

15. the current value of the target sampling point includes a predetermined current value of the target sampling point, and before determining the first time based on the first measurement time and the second measurement time, the temperature measurement method includes: determining the first measurement time; continuously collecting the current value of the target sampling point by a sampling unit, and when the collected current value meets the predetermined current value, determining the second measurement time by the sampling unit, which corresponds to the time when the collected current value meets the predetermined current value. The temperature measurement method according to claim 14.

16. determining a temperature of the susceptor based on an electrical parameter of the inductor; Determining a correspondence between inductance values ​​and temperatures; determining a temperature of the susceptor based on the correspondence between the inductance value and the temperature and the inductance value of the inductor; The temperature measurement method according to claim 8.

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