CN116046191A - Temperature measuring device, temperature measuring method and aerosol generating device - Google Patents

Abstract

The embodiment of the application discloses temperature measuring device, the device includes: a susceptor, a resonant circuit, and a controller; the susceptor is coupled with the resonant circuit; the control end of the controller is connected with the switch unit of the resonant circuit; and the controller is used for controlling the switch unit to be conducted for a first time under the condition that the control resonant circuit is in a zero state, obtaining the electrical parameter of the inductor in the resonant circuit in the first time, and determining the temperature of the susceptor based on the electrical parameter of the inductor. The embodiment of the application also discloses aerosol generating equipment and a temperature measuring method, and the technical scheme provided by the embodiment of the application reduces the limiting conditions for determining the temperature of the receptor, so that the universal applicability of the temperature measuring scheme is improved.

Description

A temperature measuring device, a temperature measuring method and an aerosol generating device

technical field

The present application relates to the technical field of temperature measurement, in particular to a temperature measuring device, a temperature measuring method and an aerosol generating device.

Background technique

At present, the methods for usually determining the temperature of the susceptor include wired temperature measurement method and wireless temperature measurement method; wherein, the wired temperature measurement method is to attach the temperature sensor to the susceptor, and then connect the electrical signal generated by the temperature sensor to the corresponding The control circuit, the microcontroller in the control circuit calculates the electrical signal to determine the temperature of the sensor; the wireless temperature measurement method mainly includes the temperature measurement method based on the infrared light wave characteristics of the heating element and the apparent impedance measurement method based on the E-class power amplifier circuit. However, in the above-mentioned wired temperature measurement method, the sensor and the control circuit cannot be separated, and the above-mentioned wireless temperature measurement application is easily limited by the scene, and can only be applied to a specific circuit structure, resulting in low applicability.

Contents of the invention

In order to solve the above technical problems, the embodiment of the present application expects to provide a temperature measuring device, a temperature measuring method, and an aerosol generating device, which can solve the problem that the sensor cannot be separated from the control circuit when measuring the temperature of the sensor in the related art, and the application is easily limited. It can only be applied to the problem of a specific circuit structure, which improves the universal applicability of the temperature measurement scheme.

The technical scheme of the embodiment of the application is realized in this way:

An embodiment of the present application provides a temperature measuring device, the device includes: a sensor, a resonant circuit and a controller, wherein:

The susceptor is coupled and connected to the resonant circuit;

The control terminal of the controller is connected to the switching unit of the resonant circuit;

The controller is configured to control the switching unit to be turned on for a first time when the resonant circuit is controlled to be in a zero state, to obtain an electrical parameter of the inductance in the resonant circuit within the first time, and based on The electrical parameter of the inductance determines the temperature of the susceptor.

In the above temperature measuring device, the electrical parameters include at least an inductance value, wherein:

The controller is specifically configured to obtain the current value of the target sampling point in the resonant circuit and the voltage value of the power supply in the resonant circuit, and based on the current value of the inductor in the resonant circuit and the voltage value of the power supply An inductance value of the inductor is determined, and a temperature of the susceptor is determined based on the inductance value of the inductor; wherein, the current value at the target sampling point is used to characterize the current value of the inductor.

In the above-mentioned temperature measuring device, the switch unit is further configured to be turned on with the second time as a cycle, so as to control the susceptor to generate a heating current.

In the above temperature measuring device, the switch unit includes a heating control switch and a temperature measurement control switch, wherein:

The controller is specifically configured to control the temperature measurement control switch to be turned on for a first time when the heating control switch is turned off so that the resonant circuit is in a zero state, and obtain the The current value of the inductor in the resonant circuit.

In the above temperature measuring device, the current value of the target sampling point includes the first current value of the target sampling point at the first measurement time and the second current value of the target sampling point at the second measurement time, wherein:

The controller is specifically configured to receive the first current value, the second current value, and the voltage value of the power source collected by the sampling unit;

The controller is specifically configured to respond to the zero state of the resonant circuit based on the first current value, the second current value, the first time, the voltage value of the power supply and the resistance in the resonant circuit the resistance value of the inductor, determine the inductance value of the inductor, and determine the temperature of the susceptor based on the inductance value of the inductor; wherein, the first time is determined based on the first measurement time and the second measurement time of.

In the above temperature measuring device, the current value of the target sampling point includes the preset current value of the target sampling point, wherein:

The controller is specifically configured to obtain the preset current value in the resonant circuit, and receive the voltage value of the power source collected by the sampling unit;

The controller is specifically configured to determine the resonant circuit based on the preset current value, the first time, the voltage value of the power supply and the resistance value of the resistor in the resonant circuit according to the zero-state response of the resonant circuit. the inductance value of the inductor, and determine the 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 determined by the The sampling unit collects the current value of the target sampling point from the first measurement time, and determines the time when the collected current value satisfies the preset current value.

The embodiment of the present application provides a temperature measurement method, the temperature measurement method includes:

When the resonant circuit coupled with the susceptor is in a zero state, the control switch unit is turned on to determine the electrical parameters of the inductance in the resonant circuit;

Based on the electrical parameter of the inductance, the temperature of the susceptor is determined.

In the above temperature measurement method, the electrical parameters of the inductance at least include the inductance value of the inductance, and the determination of the electrical parameters of the inductance 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;

An inductance value of the inductor is determined based on a current value of the inductor and a voltage value of the power supply.

In the above temperature measurement method, the determination of the current value of the inductor in the resonant circuit and the voltage value of the power supply includes:

determining the current value of the target sampling point in the resonant circuit to obtain the current value of the inductor, and determining the voltage value of the power supply through a sampling unit; wherein the target sampling point is a sampling point related to the inductor.

In the above temperature measurement method, the current value of the target sampling point includes the first current value of the target sampling point at the first measurement time and the second current value of the target sampling point at the second measurement time, and the determination The current value of the target sampling point in the resonant circuit is obtained to obtain the current value of the inductor, including:

determining a first measurement time and a second measurement time;

At the first measurement time, the first current value is collected by the sampling unit, and when the time reaches the second measurement time, the second current value is collected by the sampling unit;

A current value of the inductor is determined based on the first current value and the second current value.

In the above temperature measurement method, the current value of the target sampling point includes the preset current value of the target sampling point, and the determination of the current value of the target sampling point in the resonant circuit to obtain the current value of the inductor includes:

The preset current value of the target sampling point in the resonant circuit is obtained to obtain the current value of the inductor.

In the above temperature measurement method, the determination of the inductance value of the inductor based on the current value of the inductor and the voltage value of the power supply includes:

determining the resistance value of the resistance in the resonant circuit;

The inductance value is determined based on the current value of the inductor, the voltage value of the power supply, the first time and the resistance value.

In the above temperature measurement method, the determination of the inductance value based on the current value of the inductance, the voltage value of the power supply, the first time and the resistance value includes:

determining said first time based on a first measured time and a second measured time;

The first time, the current value of the inductor, the voltage value of the power supply and the resistance value are calculated to obtain the inductance value.

In the above temperature measurement method, the current value of the target sampling point includes the preset current value of the target sampling point, and before determining the first time based on the first measurement time and the second measurement time, further includes:

determining said first measurement time;

The current value of the target sampling point is continuously collected by the sampling unit, and when the collected current value satisfies the preset current value, it is determined by the sampling unit that the collected current value satisfies the preset current value corresponding to the second measurement time.

In the above temperature measurement method, the determination of the temperature of the susceptor based on the electrical parameters of the inductance includes:

Determine the correspondence between the inductance value and temperature;

The temperature of the susceptor is determined based on the correspondence between the inductance value and temperature and the inductance value of the inductor.

An embodiment of the present application provides an aerosol generating device, and the aerosol generating device includes the above-mentioned temperature measuring device.

In the temperature measuring device, the temperature measuring method and the aerosol generating device provided in the embodiments of the present application, the sensor is coupled and connected to the resonant circuit, the control terminal of the controller is connected to the switch unit of the resonant circuit, and the controller can control the resonant circuit to be in a zero state In the case of , control the switch unit to turn on for the first time, obtain the electrical parameters of the inductance in the resonant circuit in the first time, and determine the temperature of the susceptor based on the electrical parameters of the inductance. In this way, by coupling the susceptor with the resonant circuit, the susceptor It is separated from the resonant circuit, which solves the problem that the sensor and the control circuit cannot be separated in the related art; at the same time, when the resonant circuit is in the zero state, the resonant circuit is equivalent to a resistance-inductance circuit. Through the electrical parameters of the inductor in the resonant circuit in the first time, that is, the temperature of the susceptor is determined through the resistance-inductance circuit, the inductance and capacitance in the resonant circuit can be decoupled, and the limiting conditions in the process of determining the temperature of the susceptor are reduced. The general applicability of the temperature measurement scheme has been improved.

Description of drawings

FIG. 1 is a schematic structural diagram of a temperature measuring device provided in an embodiment of the present application;

FIG. 2 is a schematic circuit diagram of another temperature measuring device provided in the embodiment of the present application;

FIG. 3 is a schematic circuit diagram of another temperature measuring device provided in the embodiment of the present application;

FIG. 4 is a schematic circuit diagram of a temperature measuring device provided in another embodiment of the present application;

FIG. 5 is a schematic circuit diagram of another temperature measuring device provided in another embodiment of the present application;

FIG. 6 is an equivalent circuit diagram of a temperature measuring device provided in an embodiment of the present application;

Fig. 7 is a schematic circuit diagram of the setting position of the target sampling point in a temperature measuring device provided by the embodiment of the present application;

Fig. 8 is a control logic diagram of a switch unit in a temperature measuring device provided by an embodiment of the present application;

FIG. 9 is a schematic circuit diagram of measuring the current of a target sampling point in a temperature measuring device provided in an embodiment of the present application;

FIG. 10 is a schematic circuit diagram of measuring the current of the target sampling point in another temperature measuring device provided in the embodiment of the present application;

Fig. 11 is a schematic diagram of the control logic of the switch unit in another temperature measuring device provided by the embodiment of the present application;

FIG. 12 is a schematic diagram of the current of an inductor in a temperature measuring device provided in an embodiment of the present application;

Fig. 13(a) is a schematic circuit diagram of a wireless temperature measurement in a temperature measurement device provided in an embodiment of the present application;

Figure 13(b) is a schematic circuit diagram of wireless temperature measurement in another temperature measurement device provided in the embodiment of the present application;

Figure 13(c) is a circuit diagram of wireless temperature measurement in another temperature measurement device provided in the embodiment of the present application;

Fig. 13(d) is a circuit diagram of wireless temperature measurement in a temperature measurement device provided by another embodiment of the present application;

FIG. 14 is a flow chart of determining the inductance value of an inductor in a temperature measuring device provided in an embodiment of the present application;

Fig. 15 is a flow chart of determining the inductance value of the inductor in another temperature measuring device provided in the embodiment of the present application;

Fig. 16 is a flow chart of determining the inductance value of the inductor in another temperature measuring device provided in the embodiment of the present application;

Fig. 17 is a schematic flow chart of a temperature measuring method provided in the embodiment of the present application;

Figure 18 is a schematic flow chart of another temperature measurement method provided in the embodiment of the present application;

Fig. 19 is a schematic flow chart of another temperature measuring method provided in the embodiment of the present application;

Fig. 20(a) is a schematic diagram of the basic principle of wireless temperature measurement in a temperature measurement method provided by the embodiment of the present application;

Fig. 20(b) is a schematic diagram of the basic principle of another temperature measurement method provided in the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

The embodiment of the present application provides a temperature measuring device. Referring to FIG. 1, the temperature measuring device may include: a sensor 11, a resonant circuit 12 and a controller 13, wherein:

The susceptor 11 is coupled with the resonant circuit 12 .

Specifically, the resonant circuit 12 can be a parallel resonant circuit, a series resonant circuit, a single tube parallel resonant circuit, a half bridge series resonant circuit, a full bridge series resonant resonant circuit or a class E power amplifier resonant circuit; of course, the resonant circuit 12 can also be other type of resonant circuit; it should be noted that the composition of the resonant circuit 12 is not unique, usually the resonant circuit 12 can include capacitors and inductors, and the capacitors and inductors can be connected in parallel or in series. A circuit composed of capacitors and inductors connected in parallel is called a parallel resonant circuit, and a circuit composed of capacitors and inductors connected in series is called a series resonant circuit.

In the embodiment of the present application, as shown in Figure 2, the parallel resonant circuit may be a circuit composed of capacitor C1, capacitor C2, switch unit S1, inductance coil L1 and susceptor 11, and capacitor C1, capacitor C2, switch unit S1, The specific connection relationship between the inductance coil L1 and the susceptor 11 can be referred to as shown in FIG. 2 . At the same time, as shown in Figure 3, the series resonant circuit can be a circuit composed of capacitor C1, capacitor C2, switch unit S1, switch unit S2, inductor L1 and susceptor 11, and capacitor C1, capacitor C2, switch unit S1, switch unit S2 , the specific connection relationship between the inductance L1 and the susceptor 11 can be shown in FIG. 3; or, as shown in FIG. , inductance L1 and sensor 11, and the specific connection relationship between capacitor C1, capacitor C2, capacitor C3, switch unit S1, switch unit S2, inductance L1 and sensor 11 can be shown in FIG. 4; or, as shown in FIG. As shown in 5, the series resonant circuit can also be a circuit composed of capacitor C1, capacitor C2, capacitor Cp, switch unit S1, inductor L1, inductor L2 and sensor 11, and capacitor C1, capacitor C2, capacitor Cp, switch unit S1, The specific connection relationship between the inductor L1 and the susceptor 11 can be shown in FIG. 5 .

Wherein, coupling connection may refer to that the susceptor 11 is not directly connected to the resonant circuit 12, and when the parameters in the susceptor 11 change, the electrical parameters in the resonant circuit 12 will also change accordingly, or, in the resonant circuit 12 When the electrical parameters of the sensor 11 change, the parameters in the susceptor 11 will also change accordingly. In this way, non-contact temperature measurement between the susceptor 11 and the resonant circuit 12 can be realized.

A control terminal of the controller 13 is connected to the switch unit of the resonant circuit 12 .

The controller 13 is configured to control the switching unit to conduct for the first time when the resonant circuit 12 is in the zero state, obtain the electrical parameters of the inductance in the resonant circuit 12 in the first time, and determine the susceptor 11 based on the electrical parameters of the inductance temperature.

In the embodiment of the present application, the resonant circuit 12 also includes a switch unit, and the controller 13 can control the switch unit in the resonant circuit 12 through the control terminal. Taking the resonant circuit 12 as a parallel resonant circuit as shown in FIG. 1 as an example, The controller 13 controls the switch unit S1 in the resonant circuit 12 to be turned on and off periodically through the control terminal, so that L1 and C2 in the resonant circuit 12 work in a resonant state, and at this time, the periodic alternating current in L1 generates an alternating current. The magnetic field is changed, and the susceptor 11 in the alternating magnetic field generates eddy current due to electromagnetic induction, and the eddy current can generate Joule heat, so that the purpose of induction heating of the parallel resonant circuit can be realized; it should be noted that when the When the switch unit S1 in the parallel resonant circuit is in the off state, the current of the inductor L1 is 0, and the voltage across the capacitor C2 is 0, that is, L1 and C2 are in the "zero state"; when the parallel resonant circuit shown in Figure 2 When the switch unit S1 is in the closed state, since the resistance of S1 itself is much smaller than the equivalent resistance formed by the combination of the inductor and the sensor when S1 is turned on, the resistance of S1 can be approximately negligible, and the voltage across the capacitor C2 can refer to is the voltage at both ends of the power supply, so the parallel resonant circuit shown in Figure 2 can be equivalent to the resistor-inductor circuit (Resistor-inductor circuit) shown in Figure 6, that is, the RL circuit; wherein, the resistor R1 in the RL circuit is the inductor The equivalent resistance formed by combining with the susceptor, and the inductance Lr is the equivalent inductance formed by combining the inductor and the susceptor.

It should be noted that the first time can be represented by t _on , and the first time is usually at the microsecond (us) level, and the electrical parameter of the inductor can refer to the inductance value of the inductor; the controller can control the resonant circuit at In the zero state, the switch unit is controlled to turn on t _on , the inductance value of the inductor in the resonant circuit in t _on is obtained, and the temperature of the susceptor is determined based on the corresponding relationship between the inductance value of the inductor and the temperature of the susceptor.

The controller 13 is specifically configured to obtain the current value of the target sampling point in the resonance circuit 12 and the voltage value of the power supply in the resonance circuit 12, and determine the inductance value of the inductor based on the current value of the inductor in the resonance circuit 12 and the voltage value of the power supply, determining the temperature of the susceptor 11 based on the inductance value of the inductance;

Wherein, the current value of the target sampling point is used to represent the current value of the inductor.

In the embodiment of the present application, multiple target sampling points can be set in the resonant circuit 12, and the current value of the inductor can be obtained by obtaining the current value of the target sampling point; in a feasible implementation, as shown in FIG. 2 The parallel resonant circuit setting multiple target sampling points will be explained: the setting position of the target sampling point can be referred to as shown in Fig. ); the target sampling points can be respectively set at both ends of the inductor L1, that is, the target sampling point 2 (ie, the inductor current sampling point 2), and the target sampling point 3 (ie, the inductor current sampling point 3); it can also be set at the two ends of the switch unit S1 respectively Set target sampling points, that is, target sampling point 4 (ie, inductor current sampling point 4) and target sampling point 5 (ie, inductor current sampling point 5); of course, target sampling points can also be set in other positions of the parallel resonant circuit. It should be noted that the current value of the inductor can be determined by obtaining the current value at any target sampling point.

Specifically, the inductance value of the inductor can refer to the equivalent inductance value, and the controller can obtain the equivalent inductance value by calculating the current value of the inductor and the voltage value of the power supply, and based on the correspondence between the equivalent inductance value and the sensor relationship to determine the temperature of the sensor.

In other embodiments of the present application, the switch unit is further configured to be turned on at a period of the second time, so as to control the susceptor 11 to generate heating current.

Specifically, the second time is usually on the order of milliseconds. When the switch unit is turned on at the second time period, the susceptor 11 can generate a heating current. In this way, the switch unit can be used to control heating or to control Temperature measurement; at this time, the control logic of the switch unit can be shown in FIG. control the heating time); it should be noted that the second time is different from the first time.

The controller 13 is specifically configured to control the temperature measurement control switch to be turned on for the first time when the heating control switch is turned off so that the resonant circuit 12 is in a zero state, so as to obtain the current value of the inductor in the resonant circuit 12 within the first time.

It should be noted that although there are many ways to measure the current value of the inductance, considering the cost and volume of the aerosol generating equipment, the method of resistive shunt (that is, a sampling resistor connected in series in the circuit) is usually used to measure the inductance. The current value is measured; and in the circuit diagram shown in Figure 7, in the scheme of measuring the current value of the target sampling point 2 and the target sampling point 3, no matter in the process of heating or temperature measurement, the sampling resistor Rs is always connected, This leads to high power consumption; however, in the scheme of measuring the current values of target sampling point 1, target sampling point 4 and target sampling point 5, the sampling resistor Rs is connected only when S1 is turned on, and the power consumption is relatively low.

In a preferred implementation, take the circuit form of a resistor shunt to measure the current values at the target sampling point 4 and the target sampling point 5 as an example. energy consumption, the sampling resistor Rs and the heating control switch S2 can be added to the position corresponding to the target sampling point 4 in the circuit shown in Figure 2 to form the circuit structure shown in Figure 9; The position corresponding to the target sampling point 5 in the circuit is added with a sampling resistor Rs and a heating control switch S2 to form the circuit shown in FIG. 10 . Wherein, the circuit shown in FIG. 9 and the circuit shown in FIG. 10 are composed of capacitor C1, capacitor C2, temperature measurement control switch S1, heating control switch S2, sampling resistor Rs, inductor L1 and a sensor. In a feasible implementation, in the circuit diagram shown in FIG. 9 , when the controller 13 controls S2 to be turned off and controls S1 to be turned on at the first time, the current at the target sampling point 4 in the first time can be obtained value, so as to obtain the current value of the inductor; in another feasible implementation, in the circuit diagram shown in FIG. The current value of the target sampling point 5 in the first time, so as to obtain the current value of the inductor.

Specifically, the control logic of the switch unit can refer to that shown in Figure 11, which controls the heating control switch to be turned on periodically for the second time, and controls the temperature measurement control switch to be turned on for the first time; the waveform diagram of the temperature measurement control switch for the first time to be turned on Refer to FIG. 12 for the current waveform diagram of the inductor in the resonant circuit 12 within the first time period. It can be seen that when the temperature measurement control switch S1 is turned on for the first time t _on , the current value of the inductor changes approximately linearly. , and the current variation of the inductor is I at the first measurement time t0 and the second measurement time t1.

It should be noted that, in the scheme of realizing wireless temperature measurement by adding a control switch unit to short-circuit the capacitance to form an RL circuit, refer to Figure 13(a), Figure 13(b), Figure 13(c) and Figure 13(d) ) shown in the circuit diagram, can be composed of RL circuit through the control of the switch unit for wireless temperature measurement. Among them, when wireless temperature measurement is realized through the circuit diagram shown in Figure 13(a), the switch unit S0 and switch unit S1 can be controlled to be in a closed state; when wireless temperature measurement is realized through the circuit diagram shown in Figure 13(b) , the switch unit S0 and the switch unit S1 can be controlled to be in the closed state; when the wireless temperature measurement is realized through the circuit diagram shown in Figure 13(c), the switch unit S0 and the switch unit S2 can be controlled to be in the closed state; When the circuit diagram shown in (d) realizes wireless temperature measurement, the switch unit S0 can be controlled to be in the closed state, and the switch unit S1 can be controlled to be in the open state.

In an embodiment of the present application, when the conduction time of the switch unit (that is, the first time) is preset in advance according to historical experience (that is, 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 source collected by the sampling unit.

The controller 13 is specifically configured to determine the inductance value of the inductor based on the zero state response of the resonant circuit 12 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 , and determine the temperature of the susceptor 11 based on the inductance value of the inductor;

Wherein, the first time is determined based on the first measurement time and the second measurement time.

Specifically, the current value at the target sampling point can be collected by the sampling unit to obtain the current value of the inductor; the first current value is the current value measured at the first measurement time at the target sampling point collected by the sampling unit, and the second current value is The target sampling point collected by the sampling unit is the current value measured at the second measurement time; in a feasible implementation, the sampling unit may refer to an A/D sampling unit, or may refer to a microprogrammed control unit (Microprogrammed ControlUnit , MCU).

Specifically, the first measurement time and the second measurement time are preset in advance according to the experimental data, and the first time can be obtained by performing mathematical logic operations on the preset first measurement time and the preset second measurement time; wherein , the first measurement time can be represented by t0, and the second measurement time can be represented by t1; then according to the zero-state response of the resonant circuit 12, the first current value, the second current value, the first time, the voltage value of the power supply Perform mathematical logic operations with the resistance value of the resistor in the resonant circuit 12 to obtain the inductance value of the inductor; in a feasible implementation, the difference between the preset first measurement time and the preset second measurement time can be obtained to obtain first timing.

In the case that the conduction time (i.e. the first time) of the switch unit is preset in advance according to the historical experimental data, the specific process for the controller 13 to determine the current value of the inductor can be shown in FIG. In the case of conducting the first time, the first measurement time is gradually increased, and when the controller 13 monitors that the first measurement time does not increase to the second measurement time, it continues to increase the first measurement time; when the controller 13 When it is detected that the first measurement time is incremented to the second measurement time, the controller 13 triggers the sampling unit to collect the second current value at the second measurement time through software, and collects the voltage value of the power supply; after that, the sampling unit calculates according to the inductance The formula performs mathematical logic operations 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 another embodiment of the present application, when the current value of the target sampling point is preset in advance according to historical experimental data (that is, the preset current value is known), the controller 13 is specifically used to obtain the resonant circuit 12 Preset the current value, and receive the voltage value of the power source collected by the sampling unit;

The controller 13 is specifically configured to determine the inductance value of the inductor based on the zero-state response of the resonant circuit 12 based on the preset current value, the first time, the voltage value of the power supply and the resistance value of the resistor in the resonant circuit 12, and based on the inductance The inductance value determines the temperature of the susceptor 11;

Wherein, the first time is determined based on the first measurement time and the second measurement time, and the second measurement time is to collect the current value of the target sampling point from the first measurement time through the sampling unit, and when the collected current value satisfies the preset The time at which the current value is determined.

中进行运算，得到电感的电感值。In a feasible implementation, when the preset current value of the target sampling point is known, the specific process for the controller to determine the current value of the inductor can be shown in FIG. In the case of conduction, the first measurement time is gradually increased. At this time, the controller triggers the sampling unit to start collecting the current value of the target sampling point through software. When the current value of the target sampling point does not meet the preset current value, continue to collect The current value of the target sampling point; when the current value of the target sampling point satisfies the preset current value, the increment of the first measurement time is stopped, and the sampling unit collects the time at this moment by software to obtain the second measurement time, and collects the voltage of the power supply value; after that, the preset current value I, the first time t _on , the voltage value V _in of the power supply and the resistance value R ₁ of the resistor in the resonant circuit are substituted into the inductance calculation formula

Perform calculations to obtain the inductance value of the inductor.

中进行运算，得到电感的电感值。In another feasible implementation, when the preset current value of the target sampling point is known, the specific process for the controller 13 to determine the current value of the inductor can also refer to FIG. 16 , the controller 13 can switch When the unit is turned on for the first time, the first measurement time is gradually increased. At this time, the inductor current signal is compared with the preset current value through the hardware comparator circuit. When the current value of the target sampling point does not meet the preset current value When , the hardware comparator has no sampling trigger signal output, and continues to increase the first measurement time; when the current value of the target sampling point meets the preset current value, the hardware comparator outputs a sampling trigger signal, stops the increment of the first measurement time, and samples The unit collects the second measurement time corresponding to the preset current value through software, and collects the voltage value of the power supply; after that, the sampling unit collects the preset current value I, the first time t _on , the voltage value V _in of the power supply and the resistance in the resonance circuit The resistor value _R1 is brought into the inductance calculation formula

Perform calculations to obtain the inductance value of the inductor.

The temperature measuring device provided in the embodiment of the present application electromagnetically couples the susceptor to the resonant circuit, and determines the temperature of the susceptor by means of wireless temperature measurement, so that the susceptor and the resonant circuit are separated, which solves the problem that the susceptor and the control circuit cannot be separated in the related art At the same time, when the resonant circuit is in the zero state, the resonant circuit is equivalent to a resistance-inductance circuit. At this time, the electrical parameters of the inductance in the resonant circuit of the switch unit in the first time of conduction are obtained, that is, through the resistance-inductance The circuit is used to determine the temperature of the susceptor, and the inductance and capacitance in the resonant circuit can be decoupled, which reduces the limiting conditions in the process of determining the temperature of the susceptor, thereby improving the general applicability of the temperature measurement scheme.

An embodiment of the present application provides an aerosol generating device, and the aerosol generating device includes the temperature measuring device corresponding to FIG. 1 .

The embodiment of the present application provides a temperature measurement method, which can be applied to a temperature measurement device, as shown in Figure 17, the method includes the following steps:

Step 101 , when the resonant circuit coupled with the susceptor is in a zero state, control the switch unit to conduct, and determine the electrical parameters of the inductance in the resonant circuit.

Wherein, the electrical parameter of the inductor may refer to an inductance value of the inductor.

In the embodiment of the present application, when the resonant circuit coupled with the susceptor is in the zero state, the switch unit can be controlled to turn on for the first time, and then the current value of the inductor in the resonant circuit and the voltage of the power supply in the resonant circuit can be obtained first value, and then based on the current value of the inductor and the voltage value of the power supply in the resonant circuit, the inductance value of the inductor in the first time is obtained; wherein, the resonant circuit can be equivalent to an RL circuit based on the circuit equivalent principle, and based on the equivalent The circuit determines the electrical parameters of the inductor. It should be noted that the controller can also control the switch unit to be turned on at the second time period, so as to control the susceptor to generate a heating current, and then heat the susceptor.

Step 102. Determine the temperature of the susceptor based on the electrical parameter of the inductance.

In the embodiment of the present application, the temperature of the susceptor may be determined based on the electrical parameter of the inductor and the corresponding relationship between the electrical parameter of the inductor and the temperature of the susceptor.

In the temperature measurement method provided in the embodiment of the present application, when the resonant circuit coupled with the susceptor is in a zero state, the switching unit is controlled to conduct, so as to determine the electrical parameters of the inductance in the resonant circuit, and then determine the susceptor based on the electrical parameters of the inductance In this way, by coupling the susceptor to the resonant circuit, the susceptor is separated from the resonant circuit, which solves the problem that the susceptor and the control circuit cannot be separated in the related art; at the same time, when the resonant circuit is in a zero state, it is equivalent to a resonance The circuit is equivalent to a resistance-inductance circuit. At this time, the electrical parameters of the inductance in the resonant circuit of the switch unit in the first time of conduction are obtained, that is, the temperature of the sensor is determined through the resistance-inductance circuit, and the inductance and capacitance in the resonant circuit can be Decoupling reduces the restrictive conditions in the process of determining the temperature of the susceptor, thereby improving the general applicability of the temperature measurement scheme.

Based on the foregoing embodiments, the embodiments of the present application provide a temperature measurement method, which is applied to a temperature measurement device, as shown in FIG. 18 , the method includes the following steps:

Step 201 , when the resonant circuit coupled to the susceptor is in a zero state, control the switch unit to conduct, and determine the current value of the inductor in the resonant circuit and the voltage value of the power supply in the resonant circuit.

In the embodiment of the present application, when the resonant circuit is in the zero state and the control switch unit is turned on, the current value of the target sampling point in the resonant circuit can be collected by the acquisition unit, so as to obtain the current value of the inductor in the resonant circuit, and can The voltage value of the power supply in the resonant circuit is collected by the collection unit.

It should be noted that step 201 can be implemented in the following ways:

Step 201a, determine the current value of the target sampling point in the resonant circuit to obtain the current value of the inductor, and determine the voltage value of the power supply through the sampling unit.

Wherein, the target sampling point is a sampling point related to the inductance.

In the embodiment of this application, the current value of the target sampling point can be used to characterize the current value of the inductor. The reason is that in the circuit diagram shown in FIG. 7, for the target sampling point 2 and the target sampling point 3, the current value is The current flowing through the inductor, for the target sampling point 1, the target sampling point 4 and the target sampling point 5, its current value is the current flowing through the entire resonant circuit 12 (that is, the sum of the currents at both ends of the inductor and the capacitor), but the capacitor is only at There is an instantaneous charging current value near time 0. After the charging is completed, the current value at both ends of the capacitor is 0, and the current value of the entire resonant circuit is equal to the current at both ends of the inductor. Therefore, the current value of the target sampling point can be used to characterize the inductance current value.

In the embodiment of the present application, a circuit form such as a current transformer, a Hall sensor, or a resistor shunt may be used to measure the current value at the target sampling point in the circuit diagram shown in FIG. 7 .

Step 202: Determine the inductance value of the inductor based on the current value of the inductor and the voltage value of the power supply.

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

It should be noted that step 202 can be implemented in the following ways:

Step 202b1, determine the resistance value of the resistor in the resonant circuit.

In the embodiment of the present application, the resistance value of the resistor in the resonant circuit is a constant related to the resistance value formed by the combination of the susceptor and the inductance, and the resistance value of the resistor can be calculated through experimental test data; it should be noted that the resonant circuit The resistance in is the equivalent resistance.

Step 202b2, determine the inductance value based on the current value of the inductance, the voltage value of the power supply, the first time and the resistance value.

In the embodiment of the present application, the first logical operation can be performed on the first time and the resistance value, and the second logical operation can be performed on the current value of the inductor, the voltage value of the power supply and the resistance value, and then based on the result of the first logical operation and The result of the second logical operation obtains the inductance value of the inductor. It should be noted that the result of the second logic operation may be processed first, and the inductance value of the inductor may be determined based on the processed result of the second logic operation and the result of the first logic operation.

Step 203, determine the corresponding relationship between the inductance value and the temperature.

In the embodiment of the present application, the correspondence between the inductance value of the inductor and the temperature of the susceptor may be preset based on experimental data, and the preset correspondence may be stored in the controller; in a feasible implementation , when the inductance value of the inductor is L1, the temperature of the corresponding sensor is T1; when the inductance value of the inductor is L2, the temperature of the corresponding sensor is T2; when the inductance value of the inductor is L3, the temperature of the corresponding sensor is T3.

Step 204: Determine the temperature of the susceptor based on the correspondence between the inductance value and the temperature and the inductance value of the inductor.

In the embodiment of the present application, after the inductance value of the inductor is determined, the temperature corresponding to the inductance value of the inductor can be searched in the corresponding relationship stored in the controller to obtain the temperature of the susceptor, thereby realizing the wireless detection of the susceptor temperature; In a feasible implementation manner, the corresponding relationship may be stored in the form of a list.

The temperature measuring method provided in the embodiment of the present application, by coupling the susceptor to the resonant circuit, separates the susceptor from the resonant circuit, which solves the problem that the susceptor and the control circuit cannot be separated in the related art; at the same time, when the resonant circuit is at zero state, the resonant circuit is equivalent to a resistance-inductance circuit. At this time, the electrical parameters of the inductance in the resonant circuit of the switch unit in the first time of conduction are obtained, that is, the temperature of the susceptor is determined through the resistance-inductance circuit, and the resonance The inductance and capacitance in the circuit are decoupled, which reduces the restriction conditions in the process of determining the temperature of the sensor, thereby improving the general applicability of the temperature measurement scheme.

Based on the aforementioned embodiments, the embodiments of the present application provide a method for measuring temperature, which is applied to a temperature measuring device. Referring to FIG. 19 , the method includes the following steps:

Step 301, determine the voltage value of the power supply through the sampling unit.

It should be noted that, when the first measurement time and the second measurement time are preset, steps 302-304 can be executed after step 301; when the preset current value of the target sampling point is preset, after Steps 305-307 can be executed after step 301:

Step 302. Determine a first measurement time and a second measurement time.

In the embodiment of the present application, the first measurement time and the second measurement time may be preset based on experimental data.

Step 303: Collect the first current value through the sampling unit at the first measurement time, and collect the second current value through the sampling unit when the time reaches the second measurement time.

In the embodiment of the present application, at the first measurement time, the acquisition unit collects the first current value of the inductor at the first measurement time, and then gradually increases the first measurement time, when the first measurement time is incremented to the second measurement time In the case of , the second current value of the inductor at the second measurement time is collected by the acquisition unit; in a feasible implementation, the first measurement time can be gradually increased by a fixed step; of course, the first measurement time can also be It can be incrementally increased in other ways.

Step 304. Determine the current value of the inductor based on the first current value and the second current value.

In the embodiment of the present application, a mathematical logic operation can be performed on the first current value and the second current value to obtain the current value of the inductor; the first current value can be represented by I ₁ , and the second current value can be represented by I ₂ ; In a feasible implementation, the current value of the inductor can be obtained through I ₂ -I ₁ ; when the first current value corresponding to the first measurement time is 0, the current value of the inductor is the second measurement time corresponding to the second current value.

Step 305, obtaining the preset current value of the target sampling point in the resonant circuit to obtain the current value of the inductor.

In the embodiment of the present application, the current value of the target sampling point (ie, the preset current value) can be preset based on experimental data, that is, the preset current value of the target sampling point is known, so as to obtain the current value of the inductor.

Step 306, determine the first measurement time.

In the embodiment of the present application, the first measurement time may be preset based on experimental data, that is, the first measurement time is known.

Step 307: The sampling unit continuously collects the current value of the target sampling point, and when the collected current value satisfies the preset current value, the sampling unit determines the corresponding second measurement time when the collected current value satisfies the preset current value.

In the embodiment of the present application, the first measurement time can be gradually increased. At this time, the controller triggers the sampling unit to start continuously collecting the current value of the target sampling point through software. When the current value of the target sampling point does not meet the preset current value , continue to increment the first measurement time and continue to collect the current value of the target sampling point until the current value of the target sampling point meets the preset current value, stop the increment of the first measurement time, and collect the preset current value corresponding to The second measurement time of .

It should be noted that step 308 may be executed after steps 303-304 and 305-307.

Step 308: Determine a first time based on the first measurement time and the second measurement time.

In the embodiment of the present application, a mathematical logic operation can be performed on the first measurement time and the second measurement time to obtain the first time; the first measurement time can be represented by _t1 , and the second measurement time can be represented by _t2 ; In a feasible implementation manner, the first time can be obtained through t ₂ -t ₁ .

Step 309, determine the resistance value of the resistor in the resonant circuit.

Step 310 , calculating the first time, the current value of the inductor, the voltage value of the power supply and the resistance value to obtain the inductor value.

In the embodiment of the present application, the difference between the first measurement time and the second measurement time (that is, the first time) and the resistance value of the resistor can be calculated to obtain the first value, and then the first current value and the second current The difference of the value, the voltage value and the resistance value of the resistor are calculated to obtain the second value, and then the second value is processed, and the first value and the processed second value are calculated to obtain the inductance value of the inductor. In a feasible implementation manner, the following formula (1) may be used to calculate the current value of the inductor, the voltage value of the power supply, the first time and the resistance value to obtain the inductance value of the inductor.

Wherein, _Lr represents the inductance in the resonant circuit, t _on represents the first time, _R1 represents the resistance in the resonant circuit, I represents the current of the inductance, V _in represents the voltage of the power supply; it should be noted that, in this embodiment, The first time is preset based on experimental data and is a known quantity.

It should be noted that the formula (1) is to apply a control signal with a pulse width of t _on to the switch unit S1 in the parallel resonant circuit shown in Figure 2, and then calculate the inductance Lr according to the zero-state response analysis of the RL circuit Formula; It should be noted that formula (1) is derived from formula (2) and formula (3) under zero state response, where formula (2) and formula (3) are respectively:

Among them, iL _r (t) is the current value of the inductor at time t.

Step 311, determine the corresponding relationship between the inductance value and the temperature.

Step 312: Determine the temperature of the susceptor based on the correspondence between the inductance value and the temperature and the inductance value of the inductor.

In other embodiments of the present application, the temperature of the susceptor may be determined according to the corresponding relationship between the inductance value and the temperature, and the inductance value of the inductor.

In another feasible implementation, as shown in Figure 20(a), when the temperature of the susceptor changes, the magnetic permeability Ur of the susceptor changes accordingly, and the change of the magnetic permeability of the susceptor makes the susceptor and the inductance combined to form The equivalent inductance Lr changes, that is, the temperature change of the susceptor will be reflected on the equivalent inductance Lr; therefore, as shown in Figure 20(b), the relevant detection can be carried out through the above scheme first, and calculated based on the detection results The equivalent inductance Lr, and then the magnetic permeability Ur is obtained through the relationship between the equivalent inductance Lr and the magnetic permeability Ur of the susceptor, and then the temperature of the susceptor is obtained through the relationship between the magnetic permeability Ur and the susceptor temperature.

The temperature measuring method provided in the embodiment of the present application, by coupling the susceptor to the resonant circuit, separates the susceptor from the resonant circuit, which solves the problem that the susceptor and the control circuit cannot be separated in the related art; at the same time, when the resonant circuit is at zero state, the resonant circuit is equivalent to a resistance-inductance circuit. At this time, the electrical parameters of the inductance in the resonant circuit of the switch unit in the first time of conduction are obtained, that is, the temperature of the susceptor is determined through the resistance-inductance circuit, and the resonance The inductance and capacitance in the circuit are decoupled, which reduces the restriction conditions in the process of determining the temperature of the sensor, thereby improving the general applicability of the temperature measurement scheme.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

The serial numbers of the above embodiments of the present application are for description only, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product in essence or the part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to make a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in various embodiments of the present application.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structures or equivalent process transformations made by using the description of the application and the accompanying drawings are directly or indirectly used in other related technical fields. , are all included in the patent protection scope of the present application in the same way.

Claims (16)

1. A temperature measuring device, characterized in that the device comprises: a susceptor, a resonant circuit and a controller, wherein: The susceptor is coupled and connected to the resonant circuit; The control terminal of the controller is connected to the switching unit of the resonant circuit; The controller is configured to control the switching unit to be turned on for a first time when the resonant circuit is controlled to be in a zero state, to obtain an electrical parameter of the inductance in the resonant circuit within the first time, and based on The electrical parameter of the inductance determines the temperature of the susceptor. 2. The device according to claim 1, wherein the electrical parameters include at least an inductance value, wherein: The controller is specifically configured to obtain the current value of the target sampling point in the resonant circuit and the voltage value of the power supply in the resonant circuit, and based on the current value of the inductor in the resonant circuit and the voltage value of the power supply An inductance value of the inductor is determined, and a temperature of the susceptor is determined based on the inductance value of the inductor; wherein, the current value at the target sampling point is used to characterize the current value of the inductor. 3. The device of claim 1, wherein: The switch unit is also used for conducting in a period of the second time, so as to control the susceptor to generate heating current. 4. The device according to claim 1, wherein the switch unit comprises a heating control switch and a temperature measurement control switch, wherein: The controller is specifically configured to control the temperature measurement control switch to be turned on for a first time when the heating control switch is turned off so that the resonant circuit is in a zero state, and obtain the The current value of the inductor in the resonant circuit. 5. The device according to claim 2, wherein the current value of the target sampling point comprises the first current value of the target sampling point at the first measurement time and the current value of the target sampling point at the second measurement time The second current value of , where: The controller is specifically configured to receive the first current value, the second current value, and the voltage value of the power source collected by the sampling unit; The controller is specifically configured to respond to the zero state of the resonant circuit based on the first current value, the second current value, the first time, the voltage value of the power supply and the resistance in the resonant circuit the resistance value of the inductor, determine the inductance value of the inductor, and determine the temperature of the susceptor based on the inductance value of the inductor; wherein, the first time is determined based on the first measurement time and the second measurement time of. 6. The device according to claim 2, wherein the current value of the target sampling point comprises a preset current value of the target sampling point, wherein: The controller is specifically configured to obtain the preset current value in the resonant circuit, and receive the voltage value of the power source collected by the sampling unit; The controller is specifically configured to determine the resonant circuit based on the preset current value, the first time, the voltage value of the power supply and the resistance value of the resistor in the resonant circuit according to the zero-state response of the resonant circuit. the inductance value of the inductor, and determine the 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 determined by the The sampling unit collects the current value of the target sampling point from the first measurement time, and determines the time when the collected current value satisfies the preset current value. 7. An aerosol generating device, characterized in that the aerosol generating device comprises the temperature measuring device according to any one of claims 1 to 6. 8. A temperature measuring method, characterized in that it is applied to the temperature measuring device according to any one of claims 1 to 6, said method comprising: When the resonant circuit coupled with the susceptor is in a zero state, the control switch unit is turned on to determine the electrical parameters of the inductance in the resonant circuit; Based on the electrical parameter of the inductance, the temperature of the susceptor is determined. 9. The method according to claim 8, wherein the electrical parameter of the inductance includes at least an inductance value of the inductance, and the determination of the electrical parameter of the inductance in the resonant circuit comprises: determining a current value of the inductor in the resonant circuit and a voltage value of a power supply in the resonant circuit; An inductance value of the inductor is determined based on a current value of the inductor and a voltage value of the power supply. 10. The method according to claim 9, wherein the determining the current value of the inductor in the resonant circuit and the voltage value of the power supply comprises: determining the current value of the target sampling point in the resonant circuit to obtain the current value of the inductor, and determining the voltage value of the power supply through a sampling unit; wherein the target sampling point is a sampling point related to the inductor. 11. The method according to claim 10, wherein the current value of the target sampling point comprises the first current value of the target sampling point at the first measurement time and the current value of the target sampling point at the second measurement time The second current value, the determination of the current value of the target sampling point in the resonant circuit to obtain the current value of the inductor includes: determining a first measurement time and a second measurement time; At the first measurement time, the first current value is collected by the sampling unit, and when the time reaches the second measurement time, the second current value is collected by the sampling unit; A current value of the inductor is determined based on the first current value and the second current value. 12. The method according to claim 10, wherein the current value of the target sampling point comprises a preset current value of the target sampling point, and the determination of the current value of the target sampling point in the resonant circuit is obtained The current value of the inductor, including: The preset current value of the target sampling point in the resonant circuit is obtained to obtain the current value of the inductor. 13. The method according to claim 11 or 12, wherein the determining the inductance value of the inductor based on the current value of the inductor and the voltage value of the power supply comprises: determining the resistance value of the resistance in the resonant circuit; The inductance value is determined based on the current value of the inductor, the voltage value of the power supply, the first time and the resistance value. 14. The method according to claim 13, wherein the determining the inductance value based on the current value of the inductance, the voltage value of the power supply, the first time and the resistance value comprises: determining said first time based on a first measured time and a second measured time; The first time, the current value of the inductor, the voltage value of the power supply and the resistance value are calculated to obtain the inductance value. 15. The method according to claim 14, wherein the current value of the target sampling point comprises a preset current value of the target sampling point, and the determination of the current value based on the first measurement time and the second measurement time Before the first time mentioned, also include: determining said first measurement time; The current value of the target sampling point is continuously collected by the sampling unit, and when the collected current value satisfies the preset current value, it is determined by the sampling unit that the collected current value satisfies the preset current value corresponding to the second measurement time. 16. The method according to claim 8, wherein the determining the temperature of the susceptor based on the electrical parameter of the inductance comprises: Determine the correspondence between the inductance value and temperature; The temperature of the susceptor is determined based on the correspondence between the inductance value and temperature and the inductance value of the inductor.

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