Cigarette identification system and method

Abstract

The invention discloses a cigarette identification system and method. The cigarette identification system comprises a control circuit, an infrared emission circuit, an infrared receiving circuit and a processor, the first output end of the infrared receiving circuit is connected with the processor; the control circuit generates an identification signal with characteristic information and controls the infrared emission circuit to emit a first infrared light beam carrying the identification signal to the infrared receiving circuit; the infrared receiving circuit receives the first infrared beam, generates a first electric signal and transmits the first electric signal to the processor; the infrared receiving circuit is also used for receiving the second infrared beam, generating a second electric signal and transmitting the second electric signal to the processor; the processor determines position information of the cigarette according to the first electric signal and the second electric signal; wherein the second infrared beam comprises an infrared beam in an external environment. According to the cigarette recognition system provided by the invention, the recognition signal with the feature information is generated through the added control circuit, so that the recognition signal is further distinguished from the infrared signal in the external environment, and the accuracy of cigarette recognition is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette detection and identification, and in particular to a cigarette identification system and method. Background Art

[0002] Current designs for infrared tube detection of cigarette insertion rely on a transmitter on one end emitting infrared light, while a receiver on the other receives it. When no cigarette is inserted, the receiver receives the infrared light normally. However, when a cigarette is inserted, the infrared light is blocked by the cigarette itself and the receiver is unable to receive it. The system detects the difference in electrical signals between these two conditions and determines whether a cigarette has been inserted.

[0003] The above-described prior art is more reliable when used indoors or in an environment with weak infrared light, and can more accurately determine whether a cigarette is inserted or not; once the infrared light in the use environment is strong, the influence of the external infrared light will interfere with the recognition accuracy of the self-starting recognition system. Summary of the Invention

[0004] The present invention provides a cigarette identification system and method. By adding a control circuit, an infrared transmitting circuit can emit an identification signal with characteristic information, and the signal is received and transmitted to a processor through an infrared receiving circuit. On the one hand, this avoids the technical problem of frequent self-starting caused by misjudgment of cigarette position information due to excessively strong infrared signals in the external ambient light when the external ambient light is strong. On the other hand, it improves the anti-interference ability of the cigarette identification system and enhances the accuracy of cigarette identification.

[0005] According to a first aspect of the present invention, there is provided a cigarette identification system comprising a control circuit, an infrared transmitting circuit, an infrared receiving circuit and a processor;

[0006] The receiving end of the infrared transmitting circuit is connected to the output end of the control circuit, and the infrared light output end of the infrared transmitting circuit is arranged opposite to the infrared light receiving end of the infrared receiving circuit;

[0007] The first output end of the infrared receiving circuit is connected to the processor;

[0008] The control circuit generates an identification signal having characteristic information and controls the infrared transmitting circuit to transmit a first infrared beam carrying the identification signal to the infrared receiving circuit; the infrared receiving circuit receives the first infrared beam, generates a first electrical signal, and transmits the first electrical signal to the processor; the infrared receiving circuit is further configured to receive a second infrared beam, generate a second electrical signal, and transmit the second electrical signal to the processor;

[0009] The processor determines the position information of the cigarette according to the first electrical signal and the second electrical signal; wherein the second infrared light beam includes an infrared light beam in the external environment.

[0010] Optionally, it also includes a characteristic information detection circuit;

[0011] The first end of the characteristic information detection circuit is connected to the second output end of the infrared receiving circuit, and the second end of the characteristic information detection circuit is connected to the processor;

[0012] The characteristic information detection circuit converts the first infrared light beam and / or the second infrared light beam into the first electrical signal and / or the second electrical signal and transmits the converted signal to the processor.

[0013] Optionally, a voltage detection circuit is also included;

[0014] The first end of the voltage detection circuit is connected to the first output end of the characteristic information detection circuit, and the second end of the voltage detection circuit is connected to the processor;

[0015] The voltage detection circuit detects a voltage value of the first electrical signal and / or the second electrical signal, and transmits the voltage information to the processor.

[0016] Optionally, a computing circuit is also included;

[0017] The first end of the calculation circuit is connected to the second end of the voltage detection circuit, and the second end of the calculation circuit is connected to the processor;

[0018] The calculation circuit is used to calculate the difference between the voltage value and a preset voltage value, and transmit the difference to the processor.

[0019] Optionally, an alarm circuit may also be included;

[0020] The first end of the alarm circuit is connected to the processor, and the alarm circuit is used to generate an alarm signal when the processor determines that the position information of the cigarette is inconsistent with the preset position.

[0021] Optionally, the control circuit includes at least a first switching tube; the infrared transmitting circuit includes at least a first diode; the infrared receiving circuit includes at least a first transistor; a first electrode of the first switching tube is connected to a power supply terminal, a second electrode of the first switching tube is connected to a cathode of the first diode, and a third electrode of the first switching tube is connected to an enable signal terminal of a controller; and an anode of the first diode is grounded;

[0022] The first electrode of the first transistor is connected to the detection end of the controller, the second electrode of the first transistor is grounded, and the third electrode of the first transistor receives the infrared recognition signal emitted by the first diode;

[0023] The controller transmits an enable signal to the first switch tube to enable the control circuit to generate an infrared recognition signal with characteristic information, which is transmitted to the first transistor through the first diode. The first transistor receives the infrared recognition signal and transmits it to the detection end of the controller.

[0024] Optionally, the control circuit further includes a first capacitor and a first resistor;

[0025] The first end of the first capacitor is connected to the power supply end, and the second end of the first capacitor is grounded; the first end of the first resistor is connected to the first end of the first capacitor, and the second end of the first resistor is connected to the third electrode of the first switch tube.

[0026] Optionally, the infrared transmitting circuit further includes a second resistor; the infrared receiving circuit further includes a third resistor;

[0027] A first end of the second resistor is connected to the second electrode of the first switch tube, and a second end of the second resistor is connected to the cathode of the first diode;

[0028] The first end of the third resistor is connected to the power supply end, and the second end of the third resistor is connected to the first electrode of the first transistor.

[0029] According to a second aspect of the present invention, a cigarette identification method is provided, which is performed by the cigarette identification system described in the first aspect of the present invention. The cigarette identification method includes:

[0030] obtaining an identification signal generated by a control circuit;

[0031] Controlling the infrared emitting circuit to emit a first infrared beam according to the identification signal, and the infrared receiving circuit to receive the first infrared beam and convert it into a first electrical signal; the infrared receiving circuit is also used to receive a second infrared beam and convert it into a second electrical signal;

[0032] The position information of the cigarette is determined according to the first electrical signal and the second electrical signal; wherein the second infrared light beam includes an infrared light beam in the external environment.

[0033] Optionally, determining the cigarette position information according to the first electrical signal and the second electrical signal includes:

[0034] When the characteristic information of the first electrical signal is consistent with the characteristic information of the second electrical signal, obtaining a difference between a voltage value of the first electrical signal and a voltage value of the second electrical signal;

[0035] When the difference is smaller than a preset difference, it is determined that the cigarette has reached a preset position.

[0036] The present invention discloses a cigarette identification system and method, comprising a control circuit, an infrared transmitting circuit, an infrared receiving circuit and a processor; the receiving end of the infrared transmitting circuit is connected to the output end of the control circuit, and the infrared light output end of the infrared transmitting circuit is arranged opposite to the infrared light receiving end of the infrared receiving circuit; the first output end of the infrared receiving circuit is connected to the processor; the control circuit generates an identification signal with characteristic information and controls the infrared transmitting circuit to transmit an infrared light beam carrying the identification signal to the infrared receiving circuit; the infrared receiving circuit receives the first infrared light beam, generates a first electrical signal and transmits it to the processor; the infrared receiving circuit is also used to receive a second infrared light beam, generates a second electrical signal and transmits it to the processor; the processor determines the position information of the cigarette based on the first electrical signal and the second electrical signal; wherein the second infrared light beam includes an infrared light beam in the external environment. The present invention provides a cigarette identification system, which adds a control circuit so that the infrared transmitting circuit can emit an identification signal with characteristic information, and transmits it to the processor through the infrared receiving circuit. On the one hand, it avoids the technical problem of frequent self-starting due to the misjudgment of cigarette position information caused by the excessively strong infrared signal in the external ambient light when the external ambient light is strong. On the other hand, it improves the anti-interference ability of the cigarette identification system and enhances the accuracy of cigarette identification.

[0037] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 This is a structural block diagram of a cigarette identification system provided by an embodiment of the present invention;

[0040] Figure 2 This is a structural block diagram of another cigarette identification system provided by an embodiment of the present invention;

[0041] Figure 3 This is a structural block diagram of another cigarette identification system provided by an embodiment of the present invention;

[0042] Figure 4 This is a structural block diagram of another cigarette identification system provided by an embodiment of the present invention;

[0043] Figure 5 This is a structural block diagram of another cigarette identification system provided by an embodiment of the present invention;

[0044] Figure 6 This is a circuit schematic diagram of a cigarette identification system provided by an embodiment of the present invention;

[0045] Figure 7 This is a flow chart of a cigarette identification method provided by an embodiment of the present invention;

[0046] Figure 8 This is a flow chart of another cigarette identification method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0048] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0050] Figure 1 This is a structural block diagram of a cigarette identification system provided by an embodiment of the present invention, referring to Figure 1An embodiment of the present invention provides a cigarette identification system, including a control circuit 1, an infrared transmitting circuit 2, an infrared receiving circuit 3 and a processor 4; the receiving end of the infrared transmitting circuit 2 is connected to the output end of the control circuit 1, and the infrared light output end of the infrared transmitting circuit 2 is arranged opposite to the infrared light receiving end of the infrared receiving circuit 3; the first output end of the infrared receiving circuit 3 is connected to the processor 4; the control circuit 1 generates an identification signal with characteristic information and controls the infrared transmitting circuit 2 to transmit an infrared light beam carrying the identification signal to the infrared receiving circuit 3; the infrared receiving circuit 3 receives the infrared light beam, generates an electrical signal and transmits it to the processor 4; the processor 4 determines the position information of the cigarette based on the preset detection signal and the electrical signal.

[0051] Specifically, the cigarette identification system provided by the embodiment of the present invention includes a control circuit 1, and the receiving end of the infrared transmitting circuit 2 is connected to the output end of the control circuit 1. The control circuit 1 generates an identification signal with characteristic information by controlling internal components (such as a switch tube, a pulse modulator, and other structures). The characteristic information can be a preset frequency and a preset duty cycle, or a periodic signal, or a non-periodic signal, as long as it is distinguished from the ambient light infrared signal. After the control circuit 1 generates the identification signal with characteristic information, it controls the infrared transmitting circuit 2 to emit a first red light beam with characteristic information, and transmits it to the infrared receiving circuit 3 through the output end of the infrared transmitting circuit 2. The infrared receiving circuit 3 receives the first infrared light beam, generates a first electrical signal and transmits it to the processor 4. The infrared receiving circuit 3 is also used to receive a second infrared light beam. For example, the second infrared light beam can be an infrared light beam in the environment, and generates a second electrical signal and transmits it to the processor 4. The processor 4 determines the position information of the cigarette based on the first electrical signal and the second electrical signal. The principle is:

[0052] When a cigarette is inserted, the infrared receiving circuit 3 can receive the first infrared beam emitted by the infrared transmitting circuit 2, generate a first electrical signal, and transmit it to the processor 4. If the detection signal stored in the processor 4 has the same characteristic information as the first electrical signal, it is proved that the electrical signal is emitted by the system, and the self-starting function is started, for example, the heating function of the cigarette can be automatically started (i.e., the cigarette butt is ignited);

[0053] When the infrared receiving circuit 3 can receive the infrared beam (second infrared beam) in the external environment to generate a second electrical signal and transmit it to the processor 4, the infrared receiving circuit 3 can also receive the first infrared beam emitted by the infrared transmitting circuit 2 to generate a first electrical signal and transmit it to the processor 4, and compare the two signals (the first electrical signal and the second electrical signal). When the second electrical signal (i.e., the infrared beam in the external environment) is found, Figure 1When the second electrical signal (not shown) is different from the first electrical signal, it can be understood that the infrared light beam in the external environment is an infrared light beam without characteristic information. Therefore, the processor 4 can determine that the characteristic information of the second electrical signal is different from that of the first electrical signal, that is, the second electrical signal does not carry any characteristic information, while the first electrical signal is an infrared light beam with characteristic information. Therefore, the processor 4 determines that the cigarette is not inserted at this time and will not start the self-start function, thereby avoiding the problem of inefficiency caused by frequent startup of the function.

[0054] The cigarette identification system provided by the embodiment of the present invention adds a control circuit so that the infrared transmitting circuit can transmit an identification signal with characteristic information, and transmit it to the processor through the infrared receiving circuit. On the one hand, it avoids the technical problem of frequent self-starting due to the misjudgment of cigarette position information caused by the excessively strong infrared signal in the external ambient light when the external ambient light is strong. On the other hand, it improves the anti-interference ability of the cigarette identification system and enhances the accuracy of cigarette identification.

[0055] Figure 2 This is a structural block diagram of another cigarette identification system provided by an embodiment of the present invention, referring to Figure 2 Optionally, the cigarette identification system provided by the embodiment of the present invention further includes a feature information detection circuit 5;

[0056] A first end of the characteristic information detection circuit 5 is connected to the second output end of the infrared receiving circuit 3 , and a second end of the characteristic information detection circuit 5 is connected to the processor 4 ;

[0057] The characteristic information detection circuit 5 converts the first infrared light beam and / or the second infrared light beam into a first electrical signal and / or a second electrical signal and transmits the converted signal to the processor 4 .

[0058] Specifically, a first end of the characteristic information detection circuit 5 is connected to the second output end of the infrared receiving circuit 3, and a second end of the characteristic information detection circuit 5 is connected to the processor 4;

[0059] When the infrared receiving circuit 3 receives the first infrared beam, it is transmitted to the characteristic information detection circuit 5, and the first infrared beam is converted into a first electrical signal, which is then transmitted to the processor 4;

[0060] When the infrared receiving circuit 3 receives the second infrared beam, it is transmitted to the characteristic information detection circuit 5, and after converting the second infrared beam into a second electrical signal, it is transmitted to the processor 4 so that the processor 4 can determine the position information of the cigarette (for example, whether the cigarette is correctly inserted) based on the first electrical signal and the second electrical signal.

[0061] Figure 3 This is a structural block diagram of another cigarette identification system provided by an embodiment of the present invention, referring to Figure 3, the cigarette identification system provided by the embodiment of the present invention further includes a voltage detection circuit 6;

[0062] A first end of the voltage detection circuit 6 is connected to the first output end of the characteristic information detection circuit 5 , and a second end of the voltage detection circuit 6 is connected to the processor 4 ;

[0063] The voltage detection circuit 6 detects the voltage value of the first electrical signal and / or the second electrical signal, and transmits the voltage value to the processor 4 .

[0064] Specifically, the cigarette identification system provided by the embodiment of the present invention further includes a voltage detection circuit 6, a first end of the voltage detection circuit 6 is connected to the first output end of the feature information detection circuit 5, and a second end of the voltage detection circuit 6 is connected to the processor 4;

[0065] The characteristic information detection circuit 5 converts the first infrared beam transmitted by the infrared receiving circuit 3 into a first electrical signal, and / or converts the second infrared beam into a second electrical signal and transmits it to the voltage detection circuit 6;

[0066] The voltage detection circuit 6 detects the voltage value of the first electrical signal and / or the second electrical signal, and transmits the voltage value to the processor 4 .

[0067] Figure 4 This is a structural block diagram of another cigarette identification system provided by an embodiment of the present invention, referring to Figure 4 ,

[0068] Optionally, the cigarette identification system provided in the embodiment of the present invention further includes a calculation circuit 7;

[0069] A first terminal of the calculation circuit 7 is connected to a second terminal of the voltage detection circuit 6 , and a second terminal of the calculation circuit 7 is connected to the processor 4 ;

[0070] The calculation circuit 7 is used to calculate the difference between the voltage value and the preset voltage value, and transmit the difference to the processor 4 .

[0071] Specifically, the cigarette identification system provided by the embodiment of the present invention further includes a calculation circuit 7, a first end of the calculation circuit 7 is connected to the second end of the voltage detection circuit 6, and a second end of the calculation circuit 7 is connected to the processor 4.

[0072] The calculation circuit 7 obtains the voltage value detected by the voltage detection circuit, which includes the first voltage value of the first infrared beam and the second voltage value of the second infrared beam, and stores the preset voltage value in the calculation circuit 7 in advance. After obtaining the voltage value, the calculation circuit 7 performs a difference processing on the voltage value and the preset voltage value, and transmits the processing result (difference) to the processor 4.

[0073] Figure 5 This is a structural block diagram of another cigarette identification system provided by an embodiment of the present invention, referring to Figure 5 Optionally, the cigarette identification system provided by the embodiment of the present invention further includes an alarm circuit 8;

[0074] A first end of the alarm circuit 8 is connected to the processor 4 , and the alarm circuit 8 is configured to generate an alarm signal when the processor 4 determines that the position information of the cigarette is inconsistent with a preset position.

[0075] Specifically, the cigarette identification system provided by the embodiment of the present invention further includes an alarm circuit 8. A first end of the alarm circuit 8 is connected to the processor 4. The processor 4 receives the relationship between the first electrical signal and the second point signal, for example:

[0076] When a cigarette is inserted, the infrared receiving circuit 3 receives the first infrared beam emitted by the infrared transmitting circuit 2, generates a first electrical signal, and transmits it to the processor 4. If the detection signal stored in the processor 4 has the same characteristic information as the first electrical signal, it is confirmed that the electrical signal is emitted from within the system, and the self-starting function is initiated, for example, the heating function of the cigarette can be automatically activated (i.e., the cigarette butt is ignited); at this time, the alarm circuit 8 does not operate.

[0077] When the infrared receiving circuit 3 can receive the infrared beam (second infrared beam) in the external environment to generate a second electrical signal and transmit it to the processor 4, the infrared receiving circuit 3 can also receive the first infrared beam emitted by the infrared transmitting circuit 2 to generate a first electrical signal and transmit it to the processor 4, and compare the two signals (the first electrical signal and the second electrical signal). When the second electrical signal (i.e., the infrared beam in the external environment) is found, Figure 1 When the position information of the cigarette is different from the first electrical signal, the processor 4 determines that the position information of the cigarette is inconsistent with the preset position, and the alarm circuit 8 sends an alarm message to remind the staff.

[0078] Figure 6 This is a circuit diagram of a cigarette identification system provided by an embodiment of the present invention, referring to Figure 6 ,

[0079] Optionally, the control circuit in the cigarette identification system provided in the embodiment of the present invention includes at least a first switch tube M1; the infrared transmitting circuit includes at least a first diode L1; and the infrared receiving circuit includes at least a first transistor Q1; a first electrode of the first switch tube M1 is connected to the power supply terminal VCC, a second electrode of the first switch tube M1 is connected to the cathode of the first diode L1, and a third electrode of the first switch tube M1 is connected to the enable signal terminal PT_EN of the controller; and the anode of the first diode L1 is grounded.

[0080] A first electrode of the first transistor Q1 is connected to the detection terminal PT_KET1 of the controller, a second electrode of the first transistor Q1 is grounded, and a third electrode of the first transistor Q1 receives the infrared recognition signal emitted by the first diode L1;

[0081] Controller( Figure 6 (not shown) transmits an enable signal to the first switch tube M1 to enable the control circuit to generate an infrared recognition signal with characteristic information, which is transmitted to the first transistor Q1 through the first diode L1. The first transistor Q1 receives the infrared recognition signal and transmits it to the detection end of the controller.

[0082] Specifically, the controller transmits an enable signal to the enable signal terminal PT_EN to the first switch tube M1, and the first switch tube M1 is turned on and off correspondingly at a preset frequency and a preset duty cycle, thereby driving the first diode L1 to transmit an infrared signal at the same frequency and duty cycle;

[0083] After being emitted by the first diode L1 , the infrared signal is received by the first transistor Q1 and transmitted back to the detection terminal PT_KET1 of the controller.

[0084] Optional, continue to refer to Figure 6 , the control circuit further includes a first capacitor C1 and a first resistor R1;

[0085] The first end of the first capacitor C1 is connected to the power supply terminal VCC, and the second end of the first capacitor C1 is grounded; the first end of the first resistor R1 is connected to the first end of the first capacitor C1, and the second end of the first resistor R1 is connected to the third electrode of the first switch tube M1.

[0086] Specifically, a first end of the first capacitor C1 is connected to the power supply terminal VCC, and a second end of the first capacitor C1 is grounded; a first end of the first resistor R1 is connected to the first end of the first capacitor C1, and a second end of the first resistor R1 is connected to the third electrode of the first switch tube M1;

[0087] The first capacitor C1 and the first resistor R1 on the control circuit together form a filter circuit, achieving the technical effect of filtering out clutter.

[0088] Optionally, the infrared transmitting circuit also includes a second resistor R2; the infrared receiving circuit also includes a third resistor R3; the first end of the second resistor R2 is connected to the second pole of the first switching tube M1, and the second end of the second resistor R2 is connected to the cathode of the first diode L1; the first end of the third resistor R3 is connected to the power supply end VCC, and the second end of the third resistor R3 is connected to the first pole of the first transistor Q1.

[0089] Specifically, the infrared transmitting circuit also includes a second resistor R2; the infrared receiving circuit also includes a third resistor R3; the first end of the second resistor R2 is connected to the second electrode of the first switching tube M1, and the second end of the second resistor R2 is connected to the cathode of the first diode L1; the first end of the third resistor R3 is connected to the power supply terminal VCC, and the second end of the third resistor R3 is connected to the first electrode of the first transistor Q1. By setting the second resistor R2 in the path of the first diode L1 and setting the third resistor R3 in the path of the first transistor Q1, the technical effect of preventing the circuit current from being too large can be achieved.

[0090] According to the same inventive concept, an embodiment of the present invention further provides a cigarette identification method, which is executed by the cigarette identification system in any of the above-mentioned embodiments of the invention. Figure 7 This is a flow chart of a cigarette identification method provided by an embodiment of the present invention, refer to Figure 7 , cigarette identification methods include:

[0091] S101: Acquire an identification signal generated by a control circuit.

[0092] Specifically, an identification signal generated by a control circuit is acquired, wherein the identification signal is an identification signal having characteristic information, and the characteristic information may include an identification signal having a preset frequency and a preset duty cycle.

[0093] S102. Control the infrared transmitting circuit to transmit a first infrared beam according to the identification signal, and the infrared receiving circuit receives the first infrared beam and converts it into a first electrical signal; the infrared receiving circuit is also used to receive a second infrared beam and convert it into a second electrical signal.

[0094] Specifically, after the control circuit generates an identification signal with characteristic information, it controls the infrared transmitting circuit to generate a first infrared beam carrying the identification signal and transmits it to the infrared receiving circuit. The infrared receiving circuit is also used to receive a second infrared beam, wherein the second infrared beam includes an infrared beam in the external environment.

[0095] S103: Determine the position information of the cigarette according to the first electrical signal and the second electrical signal.

[0096] Specifically, the processor determines the position information of the cigarette based on the first and second electrical signals. When a cigarette is inserted, the infrared receiving circuit can receive the first infrared beam emitted by the infrared transmitting circuit, generate a first electrical signal, and transmit it to the processor. If the detection signal stored in the processor and the first electrical signal have the same characteristic information, it is confirmed that the electrical signal was emitted from the system, and the self-starting function is initiated, for example, the heating function of the cigarette can be automatically activated (i.e., the cigarette butt is ignited);

[0097] When the infrared receiving circuit can receive the infrared light beam (second infrared light beam) in the external environment to generate a second electrical signal and transmit it to the processor, the infrared receiving circuit can also receive the first infrared light beam emitted by the infrared transmitting circuit to generate a first electrical signal and transmit it to the processor. By comparing the two signals (the first electrical signal and the second electrical signal), when it is found that the second electrical signal (i.e., the infrared light beam in the external environment, not shown in the figure) is different from the first electrical signal, it can be understood that the infrared light beam in the external environment is an infrared light beam without characteristic information. Therefore, the processor can determine that the characteristic information of the second electrical signal is different from that of the first electrical signal, i.e., the second electrical signal does not carry any characteristic information, while the first electrical signal is an infrared light beam with characteristic information. Therefore, the processor determines that the cigarette is not inserted at this time and will not start the self-start function, thereby avoiding the problem of inefficiency caused by frequent starting of the function.

[0098] Based on the above-mentioned embodiment of the invention, the embodiment of the present invention further refines the determination of cigarette position information based on the first electrical signal and the second electrical signal. Figure 8 This is another flow chart of a cigarette identification method provided by an embodiment of the present invention, refer to Figure 8 The cigarette identification method provided by the embodiment of the present invention includes:

[0099] S201: Acquire an identification signal generated by a control circuit.

[0100] S202, controlling the infrared transmitting circuit to transmit a first infrared beam according to the identification signal, and the infrared receiving circuit to receive the first infrared beam and convert it into a first electrical signal; the infrared receiving circuit is also used to receive a second infrared beam and convert it into a second electrical signal.

[0101] S203: Determine the position information of the cigarette according to the first electrical signal and the second electrical signal.

[0102] S204: When the characteristic information of the first electrical signal is consistent with the characteristic information of the second electrical signal, obtain a difference between the voltage value of the first electrical signal and the voltage value of the second electrical signal.

[0103] Specifically, when the processor determines that the characteristic information carried by the first electrical signal is consistent with the characteristic information carried by the second electrical signal, the processor continues to compare the voltage values ​​to further determine the position of the cigarette.

[0104] S205: When the difference is less than the preset difference, it is determined that the cigarette has reached the preset position.

[0105] Specifically, after determining the difference between the first electrical signal and the second electrical signal in the above step S204, the size of the difference and the preset difference is determined. When the difference is smaller than the preset difference, it is determined that the cigarette has reached the preset position.

[0106] S206: When the characteristic information of the first electrical signal is inconsistent with the characteristic information of the second electrical signal, it is determined that the second electrical signal is an infrared beam in the external environment.

[0107] Specifically, when the second electrical signal is an infrared beam in the external environment, it does not carry the identification signal generated by the control circuit in the embodiment of the present invention. When the characteristic information of the first electrical signal and the second electrical signal are inconsistent, the second electrical signal is determined to be an infrared beam in the external environment.

[0108] The cigarette identification method provided in the embodiment of the present invention can achieve the same technical effect as the cigarette identification system in any of the above-mentioned invention embodiments, and will not be described in detail here.

[0109] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A cigarette identification system, characterized in that: It includes a control circuit, an infrared transmitting circuit, an infrared receiving circuit and a processor; The receiving end of the infrared transmitting circuit is connected to the output end of the control circuit, and the infrared light output end of the infrared transmitting circuit is arranged opposite to the infrared light receiving end of the infrared receiving circuit; The first output end of the infrared receiving circuit is connected to the processor; The control circuit generates an identification signal with characteristic information and controls the infrared transmitting circuit to transmit a first infrared beam carrying the identification signal to the infrared receiving circuit; The infrared receiving circuit receives the first infrared beam, generates a first electrical signal and transmits it to the processor; the infrared receiving circuit is also used to receive the second infrared beam, generates a second electrical signal and transmits it to the processor; The processor determines the position information of the cigarette according to the first electrical signal and the second electrical signal; wherein the second infrared light beam includes an infrared light beam in the external environment.

2. The cigarette identification system according to claim 1, characterized in that: Also included is a characteristic information detection circuit; The first end of the characteristic information detection circuit is connected to the second output end of the infrared receiving circuit, and the second end of the characteristic information detection circuit is connected to the processor; The characteristic information detection circuit converts the first infrared light beam and / or the second infrared light beam into the first electrical signal and / or the second electrical signal and transmits the converted signal to the processor.

3. The cigarette identification system according to claim 2, characterized in that: Also included is a voltage detection circuit; The first end of the voltage detection circuit is connected to the first output end of the characteristic information detection circuit, and the second end of the voltage detection circuit is connected to the processor; The voltage detection circuit detects a voltage value of the first electrical signal and / or the second electrical signal, and transmits the voltage value to the processor.

4. The cigarette identification system according to claim 3, characterized in that: Also includes computing circuits; The first end of the calculation circuit is connected to the second end of the voltage detection circuit, and the second end of the calculation circuit is connected to the processor; The calculation circuit is used to calculate the difference between the voltage value and a preset voltage value, and transmit the difference to the processor.

5. The cigarette identification system according to claim 1, characterized in that: Also includes an alarm circuit; The first end of the alarm circuit is connected to the processor, and the alarm circuit is used to generate an alarm signal when the processor determines that the position information of the cigarette is inconsistent with the preset position.

6. The cigarette identification system according to claim 1, characterized in that: The control circuit includes at least a first switching tube; the infrared transmitting circuit includes at least a first diode; the infrared receiving circuit includes at least a first transistor; the first electrode of the first switching tube is connected to the power supply terminal, the second electrode of the first switching tube is connected to the cathode of the first diode, and the third electrode of the first switching tube is connected to the enable signal terminal of the controller; the anode of the first diode is grounded; The first electrode of the first transistor is connected to the detection end of the controller, the second electrode of the first transistor is grounded, and the third electrode of the first transistor receives the infrared recognition signal emitted by the first diode; The controller transmits an enable signal to the first switch tube to enable the control circuit to generate an infrared recognition signal with characteristic information, which is transmitted to the first transistor through the first diode. The first transistor receives the infrared recognition signal and transmits it to the detection end of the controller.

7. The cigarette identification system according to claim 6, characterized in that: The control circuit further includes a first capacitor and a first resistor; The first end of the first capacitor is connected to the power supply end, and the second end of the first capacitor is grounded; the first end of the first resistor is connected to the first end of the first capacitor, and the second end of the first resistor is connected to the third electrode of the first switch tube.

8. The cigarette identification system according to claim 6, characterized in that: The infrared transmitting circuit further includes a second resistor; the infrared receiving circuit further includes a third resistor; A first end of the second resistor is connected to the second electrode of the first switch tube, and a second end of the second resistor is connected to the cathode of the first diode; The first end of the third resistor is connected to the power supply end, and the second end of the third resistor is connected to the first electrode of the first transistor.

9. A cigarette identification method, characterized in that: Executed by the cigarette identification system according to any one of claims 1 to 5, the cigarette identification method comprises: obtaining an identification signal generated by a control circuit; Controlling the infrared emitting circuit to emit a first infrared beam according to the identification signal, and the infrared receiving circuit to receive the first infrared beam and convert it into a first electrical signal; the infrared receiving circuit is also used to receive a second infrared beam and convert it into a second electrical signal; The position information of the cigarette is determined according to the first electrical signal and the second electrical signal; wherein the second infrared light beam includes an infrared light beam in the external environment.

10. The cigarette identification method according to claim 9, characterized in that: Determining the position information of the cigarette according to the first electrical signal and the second electrical signal includes: When the characteristic information of the first electrical signal is consistent with the characteristic information of the second electrical signal, obtaining a difference between a voltage value of the first electrical signal and a voltage value of the second electrical signal; When the difference is smaller than a preset difference, it is determined that the cigarette has reached a preset position.

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