Method for preventing article from being left in vehicle, electronic device and computer program product

Abstract

The invention provides a method for preventing an article from being left in a vehicle, an electronic device and a computer program product, which can give a more accurate alarm of article left. The electronic device comprises a first electric field detection part used for detecting the intensity of a first electric field emitted by a first portable terminal; the second electric field detection part is used for detecting the intensity of a second electric field emitted by a second portable terminal; an alarm unit; and a control unit including a determination unit. The determination unit determines that the alarm unit is controlled by the control unit when the first electric field intensity detected by the first electric field detection unit is less than or equal to a first predetermined value and the second electric field intensity detected by the second electric field detection unit is greater than or equal to a second predetermined value.

Description

Technical Field

[0001] The invention relates to a method, an electronic device and a computer program product for preventing articles from being left in a vehicle. Background Art

[0002] As the quality of life improves, people use vehicles for travel more and more frequently. However, after getting off the car, people are also prone to leaving items in the car. In Patent Document 1 (Japanese Patent Publication No. 2022-057223), a vehicle device and system for notifying the user of forgotten items when getting off the car is disclosed. By associating a mobile terminal with the owner, when the mobile terminal is forgotten, the owner corresponding to the target mobile terminal is notified.

[0003] However, the technical means of Patent Document 1 cannot solve the following erroneous notification situation, that is, notification will be given even when the user deliberately leaves the smartphone in the car or the user is not very far away from the car. Summary of the invention

[0004] The present invention is directed to a method, an electronic device and a computer program product for preventing items from being left behind in a vehicle, which can provide a more accurate alarm for items being left behind.

[0005] According to an embodiment of the present invention, an electronic device for preventing items from being left in a vehicle includes: a first electric field detection unit for detecting a first electric field strength emitted by a first portable terminal, the first portable terminal being used to lock or unlock a vehicle; a second electric field detection unit for detecting a second electric field strength emitted by a second portable terminal, the second portable terminal being used to communicate with the vehicle; an alarm unit for outputting an alarm; and a control unit for controlling the alarm unit. The control unit includes a judgment unit for judging whether to control the alarm unit. The judgment unit determines that the control unit is to control the alarm unit when the first electric field strength detected by the first electric field detection unit is less than or equal to a first predetermined value, and the second electric field strength detected by the second electric field detection unit is greater than or equal to a second predetermined value.

[0006] The electronic device according to the embodiment of the present invention further includes a seat sensor for detecting a seated passenger in the vehicle. The determination unit determines whether the control unit is to execute control of the alarm unit when the seat sensor does not detect the seat.

[0007] In the electronic device according to the embodiment of the present invention, the determination section determines whether the control of the alarm section is performed by the control section when the number of the second portable terminals detected by the second electric field detection section is greater than the number of occupants detected by the seating sensor.

[0008] In the electronic device according to an embodiment of the present invention, the alarm unit further includes an in-vehicle alarm arranged in the vehicle. The judgment unit determines to execute control of the in-vehicle alarm when the number of the second portable terminals detected by the second electric field detection unit is greater than the number of passengers detected by the seat sensor and when it is determined that the control unit executes control of the alarm unit, the judgment unit determines to execute control of the in-vehicle alarm.

[0009] The electronic device according to the embodiment of the present invention further comprises: a door lock detector for detecting the locked state of the vehicle door. The judging unit judges whether the control unit executes the control of the alarm unit when the door lock detector detects that the vehicle door is in the locked state.

[0010] The electronic device according to the embodiment of the present invention further comprises: a position information acquisition unit for acquiring the position information of the vehicle. The judgment unit judges whether the control unit executes the control of the alarm unit when the vehicle position acquired by the position information acquisition unit does not conform to the predetermined position.

[0011] In the electronic device according to an embodiment of the present invention, the control unit also includes: a storage unit for storing multiple types of the second portable terminal, and the judgment unit determines that the control unit does not execute the control of the alarm unit when the second portable terminal detected by the second electric field detection unit matches one of the multiple types stored in the storage unit.

[0012] According to an embodiment of the present invention, a method for preventing items from being left in a vehicle includes: detecting a first electric field strength emitted by a first portable terminal by a first electric field detection unit, the first portable terminal being used to lock or unlock a vehicle; detecting a second electric field strength emitted by a second portable terminal by a second electric field detection unit, the second portable terminal being used to communicate with the vehicle; and determining by a judgment unit whether control of an alarm unit is performed by a control unit, wherein the alarm unit is used to output an alarm, the control unit is used to control the alarm unit, and the control unit includes the judgment unit, wherein, when the first electric field strength detected by the first electric field detection unit is less than or equal to a first predetermined value, and the second electric field strength detected by the second electric field detection unit is greater than or equal to a second predetermined value, the judgment unit determines that control of the alarm unit is performed by the control unit.

[0013] According to an embodiment of the present invention, a computer program product includes a computer program, wherein when the computer program is executed by a computer, the computer implements the following functions: detecting a first electric field strength emitted by a first portable terminal through a first electric field detection unit, the first portable terminal being used to lock or unlock a vehicle; detecting a second electric field strength emitted by a second portable terminal through a second electric field detection unit, the second portable terminal being used to communicate with the vehicle; and determining through a judgment unit whether control of an alarm unit is performed by a control unit, wherein the alarm unit is used to output an alarm, the control unit is used to control the alarm unit, and the control unit includes the judgment unit, wherein, when the first electric field strength detected by the first electric field detection unit is less than or equal to a first predetermined value, and the second electric field strength detected by the second electric field detection unit is greater than or equal to a second predetermined value, the judgment unit determines whether control of the alarm unit is performed by the control unit.

[0014] According to an embodiment of the present invention, an electronic device for preventing items from being left in a vehicle includes: a first carrier detection unit for detecting a first carrier emitted by a first portable terminal, the first portable terminal being used to lock or unlock a vehicle; a second carrier detection unit for detecting a second carrier emitted by a second portable terminal, the second portable terminal being used to communicate with the vehicle; an alarm unit for outputting an alarm; and a control unit for controlling the alarm unit. The control unit includes a judgment unit for judging whether to control the alarm unit. The judgment unit determines that the control unit is to perform control of the alarm unit when the result of measuring the distance using the first carrier detected by the first carrier detection unit is greater than or equal to a first predetermined distance, and the result of measuring the distance using the second carrier detected by the second electric field detection unit is less than or equal to a second predetermined distance.

[0015] Based on the above, the present disclosure determines whether to issue an alarm based on the electric field strength of the first portable terminal that locks the vehicle and the electric field strength of the second portable terminal that communicates with the vehicle. Accordingly, it can be ensured that the alarm is issued when the user gets off the vehicle (the electric field strength of the first portable terminal is low) and the second portable terminal is left in the vehicle (the electric field strength of the second portable terminal is high). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a block diagram of an electronic device for preventing items from being left in a vehicle according to an embodiment of the present invention.

[0017] Figure 2 is a flow chart of a method for preventing items from being left in a vehicle according to an embodiment of the present invention.

[0018] Figure 3is a flow chart of a method for controlling an alarm unit according to an embodiment of the present invention.

[0019] Figure 4 It is a flow chart of a method for preventing items from being left in a vehicle according to the first application example of the present invention.

[0020] Figure 5 It is a flow chart of a method for preventing items from being left in a vehicle according to a second application example of the present invention.

[0021] Figure 6 It is a flow chart of a method for preventing items from being left in a vehicle according to a third application example of the present invention.

[0022] Figure 7 It is a block diagram of an electronic device for preventing items from being left in a vehicle according to a fourth application example of the present invention.

[0023] Figure 8 It is a flow chart of a method for preventing items from being left in a vehicle according to a fourth application example of the present invention.

[0024] Fig. 9 It is a block diagram of an electronic device for preventing items from being left in a vehicle according to a fifth application example of the present invention.

[0025] Fig.10 is a schematic diagram of carrier detection according to the fifth application example of the present invention.

[0026] Description of Reference Numerals

[0027] 100, 700, 900: Electronic devices

[0028] 110: Control Department

[0029] 120: First electric field detection unit

[0030] 130: Second electric field detection unit

[0031] 140: Alarm Department

[0032] 150: Judgment Department

[0033] 700A: Smart Key

[0034] 700B: Personal mobile terminal

[0035] 710: Seat sensor

[0036] 720: Door lock detector

[0037] 730: Location information acquisition unit

[0038] 740: Storage

[0039] 750: Speaker

[0040] 760: Buzzer

[0041] 770: Speaker

[0042] 780: Display

[0043] 910: First carrier detection unit

[0044] 920: Second carrier detection unit

[0045] 1001, 1002, 1003: Detector

[0046] A: Process

[0047] M1: The first portable terminal

[0048] M2: Second portable terminal

[0049] V: Vehicle

[0050] S205~S215, S305~S320, S410~S430, S505~S515, S605~S625, S805~S845: Steps DETAILED DESCRIPTION

[0051] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0052] Figure 1 1 is a block diagram of an electronic device for preventing items from being left in a vehicle according to an embodiment of the present invention. In this embodiment, the electronic device 100 is disposed inside the vehicle V to detect whether there is an item left inside the vehicle V. Figure 1 The electronic device 100 includes a control unit 110, a first electric field detection unit 120, a second electric field detection unit 130, and an alarm unit 140. In other embodiments, the electronic device 100 may also be implemented by a central control system of a vehicle V.

[0053] The control unit 110 is coupled to the first electric field detection unit 120, the second electric field detection unit 130 and the alarm unit 140. The control unit 110 can be implemented by physical hardware such as a central processing unit (CPU), a physical processor (PPU), a microprocessor (Microprocessor), a digital signal processor (DSP), and an electronic control unit (ECU). The control unit 110 is configured to determine whether to execute the control of the alarm unit 140 based on the detection results of both the first electric field detection unit 120 and the second electric field detection unit 130. In the present embodiment, the control unit 110 includes a judgment unit 150, which is used to determine whether to control the alarm unit 140 to sound an alarm. The judgment unit 150 can be implemented by software composed of code segments, or the judgment unit 150 can also be implemented by physical hardware such as an ECU.

[0054] The first electric field detection unit 120 is used to detect the first electric field strength emitted by the first portable terminal M1. The first portable terminal M1 is used to lock or unlock the vehicle V. For example, the first portable terminal M1 is a smart key. The second electric field detection unit 130 is used to detect the second electric field strength emitted by the second portable terminal M2. The second portable terminal M2 can communicate with the vehicle V. For example, the second portable terminal M2 is a personal mobile terminal such as a smart phone, a tablet computer, or a smart watch.

[0055] In one embodiment, the first portable terminal M1 and the second portable terminal M2 are equipped with Bluetooth modules respectively. The first electric field detection unit 120 and the second electric field detection unit 130 are used to detect the electric field strength of the Bluetooth signal emitted by the Bluetooth module.

[0056] Here, the first electric field detection unit 120 and the second electric field detection unit 130 can be implemented by an electric field strength sensor. The magnitude of the electric field strength can be used to determine the distance between the target object (the first portable terminal M1 or the second portable terminal M2) and the electronic device 100. For example, the first portable terminal M1 can lock or unlock the vehicle V through radio technologies such as Bluetooth or wireless communication (315MHz / 433MHz), and then detect the electric field strength (first electric field strength) of the locking signal or unlocking signal through the first electric field detection unit 120. The second portable terminal M2 can also be paired with the electronic device 100 or the vehicle system of the vehicle V2 through radio technologies such as Bluetooth, and then detect the electric field strength (second electric field strength) of the pairing signal through the second electric field detection unit 130. Alternatively, in other embodiments, it can also be set that the first portable terminal M1 and the second portable terminal M2 transmit a signal at intervals, respectively, so that the first electric field detection unit 120 and the second electric field detection unit 130 can continuously monitor the magnitude of the first electric field strength and the second electric field strength.

[0057] The alarm unit 140 is used to output an alarm. For example, the alarm unit 140 can issue an alarm through a sound signal, a display signal, a vibration signal, etc. The alarm unit 140 can be a speaker, a buzzer, a speaker, a display, etc. When the first electric field strength detected by the first electric field detection unit 120 is less than or equal to the first predetermined value, and the second electric field strength detected by the second electric field detection unit 130 is greater than or equal to the second predetermined value, the judgment unit 150 determines that the control unit 110 executes the control of the alarm unit 140, for example, controls the alarm unit 140 to issue an alarm.

[0058] In addition, in other embodiments, the control unit 110 may also control the alarm unit 140 to transmit an alarm instruction to the first portable terminal M1 to notify the user through the first portable terminal M1. For example, the alarm may be performed by sound, vibration, visual display, etc.

[0059] Figure 2 This is a flow chart of a method for preventing items from being left in a vehicle according to an embodiment of the present invention. Figure 1 and Figure 2 In step S205, the first electric field strength emitted by the first portable terminal M1 is detected by the first electric field detection unit 120. In step S210, the second electric field strength emitted by the second portable terminal M2 is detected by the second electric field detection unit 130. In step S215, the determination unit 150 determines whether the control unit 140 is to be executed by the control unit 140. The following example illustrates how to determine whether the control unit 110 is to be executed by the control unit 110 using the determination unit 150.

[0060] Figure 3 is a flow chart of a method for controlling an alarm unit according to an embodiment of the present invention. Figure 3 , process A is a process for controlling the alarm unit based on the electric field strength. In step S305, the judgment unit 150 judges whether the first electric field strength is less than or equal to the first predetermined value. If the first electric field strength is greater than the first predetermined value, in step S310, the judgment unit 150 determines that the control unit 110 does not execute the control of the alarm unit 140. If the first electric field strength is less than or equal to the first predetermined value, in step S315, it is judged whether the second electric field strength is greater than or equal to the second predetermined value. If the second electric field strength is less than or equal to the second predetermined value, in step S310, the judgment unit 150 determines that the control unit 110 does not execute the control of the alarm unit 140. If the second electric field strength is greater than or equal to the second predetermined value, in step S320, the judgment unit 150 determines that the control unit 110 executes the control of the alarm unit 140, for example, outputs an alarm through the alarm unit 140.

[0061] In one embodiment, the first predetermined value is used to define whether the first portable terminal M1 is still within the specified first range. The second predetermined value is used to define whether the second portable terminal M2 is still within the specified second range. The first range and the second range may be the same or different. When the first range and the second range are the same, the first predetermined value and the second predetermined value are set to be the same. When the first range and the second range are different, the first predetermined value and the second predetermined value are set to be different. For example, the first range can be set to a spatial range within the vehicle V or a specified range centered on the electronic device 100 (which may be larger than the spatial range of the vehicle V). The second range is set to a spatial range within the vehicle V.

[0062] When the first electric field strength is greater than the first predetermined value, it means that the first portable terminal M1 is still in the vehicle (the user has not gotten off the vehicle) or is located outside the vehicle very close to the vehicle (the user has just gotten off the vehicle), and as shown in step S310, the control of the alarm unit 140 is not executed. If the first electric field strength is less than or equal to the first predetermined value, it means that the user has left the specified first range with the first portable terminal M1 (for example, the user has gotten off the vehicle with the first portable terminal M1 and is a certain distance away from the vehicle V), and step S315 is executed to determine the location of the second portable terminal M2.

[0063] When the second electric field strength is greater than or equal to the second predetermined value, it indicates that the second portable terminal M2 is still in the vehicle, so the control of the alarm unit 140 is executed as shown in step S320. Since the second portable terminal M2 left in the vehicle will not be moved, the second electric field strength sensed for a period of time will remain within a certain range (a numerical range greater than the second predetermined value). When the second electric field strength is less than the second predetermined value, it indicates that the second portable terminal M2 is no longer in the vehicle, so the control of the alarm unit 140 is not executed as shown in step S310.

[0064] For example, when the vehicle V drives to a gas station, the user leaves the second portable terminal M2 in the car and gets off the car with the first portable terminal M1 to refuel by self-service. If the alarm sounds as soon as the user gets off the car, it will cause trouble to the user. Therefore, the first predetermined value can be set to the electric field strength corresponding to a distance of 5 meters from the vehicle V. Accordingly, it is determined whether to sound the alarm only when the first electric field strength is less than or equal to the first predetermined value, thus solving the problem of sounding the alarm as soon as the user gets off the car.

[0065] In other embodiments, other judgment methods can also be used to confirm whether to execute the above-mentioned process A. For example, in one embodiment, the electronic device 100 also includes a seat sensor, which is used to detect the occupant sitting in the vehicle V. The seat sensor includes, for example, a pressure sensor, which can detect the seat of a person according to the load generated by the seat. When the seat sensor does not detect the occupant, the judgment unit 150 judges whether the control unit 110 executes the control of the alarm unit 140. In another embodiment, the electronic device 100 also includes a door lock detector, which is used to detect the locking state of the vehicle door. When the door lock detector detects that the vehicle door is in a locked state, the judgment unit 150 judges whether the control unit 110 executes the control of the alarm unit 140. In another embodiment, the electronic device 100 also includes a position information acquisition unit, which is used to obtain the position information of the vehicle V. When the judgment unit 150 determines that the vehicle position does not meet the predetermined position, it judges whether the control unit 110 executes the control of the alarm unit 140.

[0066] For example, Figure 4 is a flow chart of a method for preventing items from being left in a vehicle according to the first application example of the present invention. Figure 3 In the application example, when executing the determination of process A, at least one of step S410, step S420 and step S430 may be further executed.

[0067] Please refer to Figure 4 In step S410, the determination unit 150 determines whether there is an occupant sitting on the seat. If it is determined that the occupant is not sitting on the seat, the execution Figure 3The process A shown in the figure. For example, a seat sensor can be installed on the seat to detect whether there is someone sitting on the seat. If it is determined that there is still a passenger sitting on the seat, the current judgment process ends. That is, the judgment of process A is performed only when it is determined that there is no one in the car. According to this, false alarms can be avoided when there are still passengers holding portable terminals in the car.

[0068] In step S420, the determination unit 150 determines whether the vehicle door is in a locked state. For example, the locked state of the vehicle door can be further detected by a door lock detector. If it is determined that the vehicle door is in a locked state, the execution Figure 3 The process A shown in FIG. 1 is as follows. If it is determined that the door is not in a locked state, the current judgment process is terminated. By determining whether to sound an alarm when the door is in a locked state, the following problem can be solved, that is, not sounding an alarm when the door is in an unlocked state in which the occupant is expected to return to the vehicle immediately.

[0069] In step S430, the determination unit 150 determines whether the vehicle position meets the predetermined position. If it is determined that the vehicle position does not meet the predetermined position, the execution Figure 3 The process A shown in FIG. 1 is shown. If it is determined that the vehicle position meets the predetermined position, the current judgment process ends. The predetermined position is, for example, a home, a residential area, or a pre-stored location (a specific supermarket, a specific convenience store, etc.). Accordingly, by determining whether to issue an alarm when the vehicle V is at a position other than the predetermined position, the problem of the alarm being issued when the vehicle V is parked at the predetermined position can be solved.

[0070] Figure 5 This is a flow chart of a method for preventing items from being left in a vehicle according to the second application example of the present invention. Figure 5 In step S505, the seat sensor is used to detect whether there is an occupant sitting on the seat. If it is determined that an occupant is detected sitting on the seat, in step S510, the judgment unit 150 determines whether the number of second portable terminals M2 detected by the second electric field detection unit 130 is greater than the number of occupants detected by the seat sensor. For example, a seat sensor may be provided on each seat in the vehicle V to detect whether there is an occupant sitting on each seat. When it is determined that the number of second portable terminals M2 is greater than the number of occupants, the judgment unit 150 performs Figure 3 Process A shown.

[0071] That is, if the number of detected second portable terminals M2 is greater than the number of passengers in the vehicle, it is possible that the second portable terminal M2 is forgotten, so a more accurate alarm for items left behind can be issued by judging whether to issue an alarm through process A. When it is determined that the number of second portable terminals M2 is not greater than the number of passengers, the current judgment process ends.

[0072] In addition, when the number of second portable terminals M2 detected by the second electric field detection unit 130 is greater than the number of passengers detected by the seat sensor, and when it is determined that the control unit 110 performs the control of the alarm unit 140, the judgment unit 150 may further perform the control of the in-vehicle alarm, for example, the in-vehicle alarm emits an alarm toward the inside of the vehicle. For example, the alarm unit 140 includes an in-vehicle alarm such as a horn, buzzer, speaker, or display provided in the vehicle. Since there are still passengers inside the vehicle V, the in-vehicle alarm emits an alarm toward the inside of the vehicle. By emitting an alarm toward the inside of the vehicle when there are people inside the vehicle V, interference to people near the vehicle V can be eliminated.

[0073] Returning to step S505, if it is determined that no passenger is detected sitting on the seat, in step S515, the determination unit 150 determines whether the door is in a locked state. For example, the door lock detector can be used to further detect the door lock state. If it is determined that the door is not in a locked state, the execution Figure 3 Process A shown.

[0074] Figure 6 is a flow chart of a method for preventing items from being left in a vehicle according to the third application example of the present invention. In this embodiment, the control unit 110 further includes a storage unit for storing multiple types of the second portable terminal M2. Figure 6 Step S605, step S610, step S615, and step S625 are respectively Figure 3 The steps S305 to S320 shown in FIG. 1 are the same as those in FIG. Figure 3 The difference is that after the judgment of step S615 is "yes", in step S620, the judgment unit 150 further judges whether the second portable terminal M2 conforms to one of the multiple types stored in the storage unit. When it is determined that the second portable terminal M2 conforms to one of the types stored in the storage unit, in step S610, the control of the alarm unit 140 is not executed. When it is determined that the second portable terminal M2 does not conform to any type stored in the storage unit, in step S625, the control of the alarm unit 140 is executed. By storing the type of portable terminal that the user wants to place in the car in advance in the electronic device 100, it is possible to detect that the user wants to place the portable terminal in the car without issuing an alarm. The portable terminal to be placed in the car is, for example, a portable terminal used as a storage device, a portable terminal for playing music, a portable terminal that is not usually carried around, etc.

[0075] Figure 7 This is a block diagram of an electronic device for preventing items from being left in a car according to a fourth application example of the present invention. Figure 7In the fourth application example, the smart key 700A is used as the first portable terminal, and the personal mobile terminal 700B is used as the second portable terminal. The electronic device 700 is set in the vehicle V. In addition to the electronic device 700 including Figure 1 In addition to the control unit 110, the first electric field detection unit 120, the second electric field detection unit 130, the alarm unit 140 and the judgment unit 150 shown, it also includes a seat sensor 710, a door lock detector 720 and a position information acquisition unit 730. In addition, the control unit 110 also includes a storage unit 740 for storing various types of personal mobile terminals that the user wants to place in the car. The position information acquisition unit 730 is, for example, a global positioning system (GPS) for obtaining the position information of the vehicle V, such as the current vehicle position. The alarm unit 140 includes a speaker 750, a buzzer 760, a speaker 770 and a display 780. The storage unit 740 is, for example, a fixed or removable random access memory (RAM), a read-only memory (ROM), a cache, a hard disk or other similar devices or a combination of these devices.

[0076] Figure 8 This is a flow chart of a method for preventing items from being left in a vehicle according to the fourth application example of the present invention. Figure 8 In step S805, the determination unit 150 determines whether there is an occupant sitting on the seat based on the detection result of the seat sensor 710. If it is determined that there is an occupant sitting on the seat, in step S810, the determination unit 150 determines whether the number of personal mobile terminals 700B detected by the second electric field detection unit 130 is greater than the number of occupants detected by the seat sensor 710. When it is determined that the number of detected personal mobile terminals 700B is less than the number of occupants in the vehicle, this determination process ends.

[0077] When it is determined that the number of detected personal mobile terminals 700B is greater than the number of passengers in the vehicle, in step S815, it is determined whether the first electric field strength detected by the first electric field detection unit 120 is less than or equal to the first predetermined value, and whether the second electric field strength detected by the second electric field detection unit 130 is greater than or equal to the second predetermined value. When it is determined that the first electric field strength is less than or equal to the first predetermined value, and the second electric field strength is greater than or equal to the second predetermined value, in step S820, the control unit 110 controls the alarm unit 140 to sound an alarm toward the vehicle. For example, the situation in which the judgment of step S815 is "yes" is: the user gets off the vehicle with the smart key 700A, and the user's personal mobile terminal 700B is left in the vehicle. When the judgment of step S815 is "no", this judgment process ends.

[0078] Returning to step S805, if it is determined that there is no passenger sitting on the seat, in step S825, the judgment unit 150 determines whether the door is in a locked state through the detection result of the door lock detector 720. If it is determined that the door is not in a locked state, the current judgment process is terminated. If it is determined that the door is in a locked state, in step S830, the judgment unit 150 determines whether the vehicle position meets the predetermined position through the position information acquisition unit 730. If it is determined that the vehicle position meets the predetermined position, the current judgment process is terminated. If it is determined that the vehicle position does not meet the predetermined position, in step S835, it is determined whether the first electric field strength detected by the first electric field detection unit 120 is less than or equal to the first predetermined value, and whether the second electric field strength detected by the second electric field detection unit 130 is greater than or equal to the second predetermined value. When the judgment in step S815 is "No", the current judgment process is terminated.

[0079] When it is determined that the first electric field strength is less than or equal to the first predetermined value, and the second electric field strength is greater than or equal to the second predetermined value, in step S840, the judgment unit 150 judges whether the personal action terminal 700B conforms to one of the multiple types stored in the storage unit 740. For example, when it is determined that the user gets off the car with the smart key 700A, and the user's personal action terminal 700B is left in the car (the judgment of step S835 is "yes"), it is further determined whether the personal action terminal 700B left in the car is the terminal preset to be left in the car. When it is determined that the personal action terminal 700B conforms to one of the types stored in the storage unit 740, the current judgment process ends. When it is determined that the personal action terminal 700B does not conform to any type stored in the storage unit 740, in step S845, the control unit 110 controls the alarm unit 140 to sound an alarm.

[0080] In other embodiments, the seat sensor 710, the door lock detector 720 and the location information acquisition unit 730 are selectively disposed in the electronic device 700 to cooperate with the first electric field detection unit 120 and the second electric field detection unit 130 to determine whether the personal mobile terminal 700B is left in the vehicle.

[0081] In one embodiment, in a modern vehicle, a smart key 700A (e.g., a key fob) can be used to lock and unlock the vehicle through wireless communication technology. The electronic device 700 determines the distance between the user and the vehicle by measuring the electric field strength of the signal sent by the smart key 700A carried by the user, that is, the closer to the vehicle, the higher the electric field strength detected by the electronic device 700. In addition, the user's personal mobile terminal 700B (e.g., a smart phone) can also be connected to the vehicle through a wireless communication module such as Bluetooth or Wi-Fi. The wireless communication module is usually installed in the audio unit / navigation unit. The electronic device 700 can estimate the relative distance between the smart key 700A and the vehicle and the relative distance between the personal mobile terminal 700B and the vehicle based on the electric field strength of the received signal. By utilizing the influence of personal mobile terminal 700B placed inside the vehicle (high electric field strength) and smart key 700A away from the vehicle (low electric field strength), an alarm sound is issued through a horn, speaker, etc., or an alarm is issued by displaying, vibrating, making a sound, etc. through smart key 700A, thereby notifying the user that the smartphone is forgotten in the car.

[0082] Fig. 9 It is a block diagram of an electronic device for preventing items from being left in a vehicle according to a fifth application example of the present invention.

[0083] Fig.10 is a schematic diagram of carrier detection according to the fifth application example of the present invention. Fig. 9 and Fig.10 , the electronic device 900 is arranged inside the vehicle V to detect whether there is any object left inside the vehicle V. The electronic device 900 includes a control unit 110, an alarm unit 140, a first carrier detection unit 910 and a second carrier detection unit 920. In other embodiments, the electronic device 900 can also be implemented by the central control system of the vehicle V. The control unit 110 is coupled to the first carrier detection unit 910, the second carrier detection unit 920 and the alarm unit 140. The description of the control unit 110 and the alarm unit 140 in the electronic device 900 can refer to Figure 1 The relevant description will not be repeated here.

[0084] The first carrier detection unit 910 is used to detect the first carrier transmitted by the first portable terminal M1. The second carrier detection unit 920 is used to detect the second carrier transmitted by the second portable terminal M2. In one embodiment, the first carrier detection unit 910 and the second carrier detection unit 920 can be integrated into one detector, and multiple detectors (such as Fig.10 Detectors 1001, 1002, 1003 are shown).

[0085] The determination unit 150 determines that the control unit 110 executes the control of the alarm unit 140 when the result of measuring the distance using the first carrier is greater than or equal to the first predetermined distance and the result of measuring the distance using the second carrier is less than or equal to the second predetermined distance.

[0086] As a fifth application example, Figure 1 The first electric field detection unit 120 is replaced by the first carrier detection unit 910, and the second electric field detection unit 130 is replaced by the second carrier detection unit 920. The vehicle V, the first portable terminal M1 and the second portable terminal M2 can perform wireless communication as described above. At this time, the first carrier detection unit 910 and the second carrier detection unit 920 detect the carriers from the first portable terminal M1 and the second portable terminal M2, and the judgment unit 150 determines whether to perform the control of the alarm unit 140 based on the result of measuring the distance, and the control of the alarm unit 140 is performed by the control unit 150 based on the judgment result.

[0087] Specifically, when the first carrier detection unit 910 detects the first carrier from the first portable terminal M1, the judgment unit 150 performs distance measurement and the measurement result is greater than or equal to the first predetermined distance, and when the second carrier detection unit 920 detects the second carrier from the second portable terminal M2, the judgment unit 150 performs distance measurement and the measurement result is less than or equal to the second predetermined distance, the control unit 110 controls the alarm unit 140. The above configuration measures the distance to the target object (the first portable terminal M1 or the second portable terminal M2) using the carrier, and judges the distance based on the measurement result.

[0088] When the measurement result based on the first carrier wave from the first portable terminal M1 is greater than or equal to the first predetermined distance, and the measurement result based on the second carrier wave from the second portable terminal M2 is less than or equal to the second predetermined distance, it indicates that the user is away from the vehicle V, and the second portable terminal M2 is forgotten in the vehicle. At this time, an alarm is sounded by the alarm unit 140 to remind the user to pay attention to the left-behind items.

[0089] In the case where the smart key is used as the first portable terminal M1 and the personal action terminal is used as the second portable terminal M2, the smart key and the personal action terminal output a carrier wave when receiving a signal from the vehicle V. The detectors 1001, 1002, and 1003 arranged in the vehicle V can use the phase difference information of the received carrier wave and the trigonometric principle to calculate the distance between the vehicle V and the carrier wave transmitting end (smart key or personal action terminal). In one embodiment, the distance is calculated by using a general carrier wave phase difference signal. The warning condition is: the result of the first carrier wave measuring the distance ≥ the first predetermined distance, and the result of the second carrier wave measuring the distance ≤ the second predetermined distance.

[0090] Based on the above, the present disclosure can determine the distance between the first portable terminal and the second portable terminal and the vehicle based on the electric field strength or by using a carrier wave. Accordingly, when it is determined that the user holds the first portable terminal away from the vehicle and the second portable terminal used by the user is still left in the vehicle, an alarm can be issued to remind the user.

[0091] For example, the high electric field strength when the second portable terminal is placed inside the vehicle and the low electric field strength when the first portable terminal is far away from the vehicle can be used to determine that the user has left the vehicle with the first portable terminal and the second portable terminal used by the user is still left in the vehicle, thereby issuing an alarm to remind the user. Alternatively, the long distance between the first portable terminal and the vehicle calculated based on the carrier wave and the relatively short distance between the second portable terminal and the vehicle calculated based on the carrier wave can be used to determine that the user has left the vehicle with the first portable terminal and the second portable terminal used by the user is still left in the vehicle, thereby issuing an alarm to remind the user.

[0092] Furthermore, it is possible to further configure the alarm not to sound in the following situations to avoid causing trouble or false alarms, and to accurately sound the alarm for items left behind. The situations where the alarm is not sounded include: (1) when there is another user left in the car, the alarm will not sound because the user's smartphone may be in use by a passenger; (2) when the car door is unlocked, the alarm will not sound because the user may return to the car soon; (3) when the car is parked in a predetermined location such as an area near a convenience store or drugstore, the alarm will not sound because the user will return to the car soon; (4) when the car is parked in a predetermined location such as a residential area, the alarm will not sound because sounding the alarm will disturb the neighbors; (5) when it is determined that the item left in the car is a portable terminal (such as a Bluetooth radio) that must be left in the car, the alarm will not sound. (6) when the setting value in the vehicle customization setting is to turn off the alarm function, the alarm will not sound; some car owners may find the alarm sound annoying, so it can be turned off in the vehicle customization setting; (7) in the case of radio wave loss, the battery of the portable terminal may be exhausted, so the alarm will not sound.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic device for preventing items from being left in a vehicle, characterized in that: include: A first electric field detection unit, used to detect a first electric field intensity emitted by a first portable terminal, wherein the first portable terminal is used to lock or unlock a vehicle; a second electric field detection unit, for detecting a second electric field strength emitted by a second portable terminal, the second portable terminal being used to communicate with the vehicle; An alarm unit, for outputting an alarm; as well as a control unit, for controlling the alarm unit, The control unit includes a judgment unit, and the judgment unit is used to judge whether to control the alarm unit. The determination unit determines that the control unit shall execute control of the alarm unit when the first electric field strength detected by the first electric field detection unit is less than or equal to a first predetermined value and the second electric field strength detected by the second electric field detection unit is greater than or equal to a second predetermined value.

2. The electronic device according to claim 1, characterized in that: Also includes: a seat occupancy sensor, detecting a seated occupant in the vehicle, The determination unit determines whether the control unit is to execute control of the alarm unit when the seat occupancy sensor does not detect the occupant.

3. The electronic device according to claim 2, characterized in that: The determination unit determines whether the control of the alarm unit is executed by the control unit when the number of the second portable terminals detected by the second electric field detection unit is greater than the number of passengers detected by the seating sensor.

4. The electronic device according to claim 3, characterized in that: The alarm unit also includes an in-vehicle alarm arranged in the vehicle. The determination unit determines to execute control of the in-vehicle alarm when the number of the second portable terminals detected by the second electric field detection unit is greater than the number of passengers detected by the seating sensor and when it is determined that the control unit executes control of the alarm unit.

5. The electronic device according to claim 1, characterized in that: Also includes: Door lock detector, detects the locking status of the door, The determination unit determines whether the control unit is to execute control of the alarm unit when the door lock detector detects that the vehicle door is in a locked state.

6. The electronic device according to claim 1, characterized in that: Also includes: A position information acquisition unit is used to acquire the position information of the vehicle. The determination unit determines whether the control unit should execute control of the alarm unit when the vehicle position acquired by the position information acquisition unit does not match a predetermined position.

7. The electronic device according to claim 1, characterized in that: The control unit further includes: a storage unit for storing a plurality of types of the second portable terminal, The determination unit determines that the control unit does not execute the control of the alarm unit when the second portable terminal detected by the second electric field detection unit matches one of the plurality of types stored in the storage unit.

8. A method for preventing items from being left in a vehicle, characterized in that: include: detecting, by a first electric field detection unit, a first electric field intensity emitted by a first portable terminal, wherein the first portable terminal is used to lock or unlock a vehicle; detecting, by a second electric field detection unit, a second electric field intensity emitted by a second portable terminal, the second portable terminal being used to communicate with the vehicle; as well as The judging unit judges whether the control unit is to execute the control of the alarm unit, wherein the alarm unit is used to output an alarm, the control unit is used to control the alarm unit, and the control unit includes the judging unit. When the first electric field strength detected by the first electric field detection unit is less than or equal to a first predetermined value, and the second electric field strength detected by the second electric field detection unit is greater than or equal to a second predetermined value, the judgment unit determines that the control unit executes the control of the alarm unit.

9. A computer program product, characterized in that The invention comprises a computer program, wherein when the computer program is executed by a computer, the computer is enabled to implement the following functions: detecting, by a first electric field detection unit, a first electric field intensity emitted by a first portable terminal, wherein the first portable terminal is used to lock or unlock a vehicle; detecting, by a second electric field detection unit, a second electric field intensity emitted by a second portable terminal, the second portable terminal being used to communicate with the vehicle; as well as The judging unit judges whether the control unit is to execute the control of the alarm unit, wherein the alarm unit is used to output an alarm, the control unit is used to control the alarm unit, and the control unit includes the judging unit. When the first electric field strength detected by the first electric field detection unit is less than or equal to a first predetermined value, and the second electric field strength detected by the second electric field detection unit is greater than or equal to a second predetermined value, the judgment unit determines that the control unit executes the control of the alarm unit.

10. An electronic device for preventing items from being left in a vehicle, characterized in that: include: A first carrier detection unit, configured to detect a first carrier transmitted by a first portable terminal, wherein the first portable terminal is configured to lock or unlock a vehicle; A second carrier detection unit, used to detect a second carrier transmitted by a second portable terminal, wherein the second portable terminal is used to communicate with the vehicle; An alarm unit, for outputting an alarm; as well as a control unit, for controlling the alarm unit, The control unit includes a judgment unit, and the judgment unit is used to judge whether to control the alarm unit. The judgment unit determines that the control unit shall execute the control of the alarm unit when the result of measuring the distance using the first carrier detected by the first carrier detection unit is greater than or equal to a first predetermined distance, and the result of measuring the distance using the second carrier detected by the second carrier detection unit is less than or equal to a second predetermined distance.

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