JP2018080539A - Vehicle communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle communication system capable of determining more accurately whether a portable device is located inside or outside a car.SOLUTION: A vehicle 2 has a control unit 20, a BLE communication unit 21 that transmits and receives a BLE radio wave of a BLE band, and a window W that reduces ultraviolet radiation. A smartphone 3 comprises a control unit 30, a BLE communication unit 31 that transmits and receives a BLE radio wave of a BLE band, a GPS positioning processing unit 32 that detects information about the current location of the smartphone 3, and an internet communication unit 33 that obtains a variety of information including "weather" from an internet 33a. A wearable device 4 comprises a control unit 40, a BLE communication unit 41 that transmits and receives a BLE radio wave of a BLE band, and an ultraviolet radiation sensor 42 which detects an amount of ambient ultraviolet radiation Iuv that reaches the wearable device 4. The control unit 20 performs UV determination to determine whether the smartphone 3 is inside or outside a car based on whether the amount of ultraviolet radiation Iuv is above a threshold of ultraviolet radiation or not.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle communication system.

  2. Description of the Related Art Conventionally, an electronic key system that performs ID verification by wireless communication between an electronic key and a vehicle is known (see Patent Document 1). In such an electronic key system, when the electronic key receives a request transmitted from the vehicle, the electronic key automatically returns a response to the vehicle with an ID code in response thereto. When ID verification is established outside the vehicle, door locking / unlocking is permitted, and when ID verification is established inside the vehicle, engine start is permitted.

JP 2007-170162 A JP 2014-227647 A

  However, in the method of measuring the distance between the vehicle and the electronic key from the time required for transmission / reception of radio waves wirelessly communicated between the vehicle and the electronic key in Patent Document 2, a glass window that is a boundary portion outside and inside the vehicle interior In the vicinity, it has been difficult to determine whether the portable device is located inside the vehicle compartment or outside the vehicle compartment. This is because the radio wave passes through the glass window, so that there is almost no difference in the time required for transmission / reception of the radio wave between the portion of the glass window inside the vehicle compartment and the portion of the glass window outside the vehicle compartment.

  Even when the driver holding the portable device automatically locks / unlocks when the driver moves out of the passenger compartment, or when the driver automatically adjusts the seat position to the stored position when boarding Therefore, it is necessary to accurately determine whether the portable device is located inside or outside the vehicle interior.

  An object of the present invention is to provide a vehicle communication system that can more accurately determine whether a portable device is located inside or outside a vehicle interior.

  A vehicle communication system that can achieve the above object is a vehicle communication system that performs wireless communication between a communication terminal and a vehicle, wherein the communication terminal includes an ultraviolet sensor that detects the amount of ultraviolet light around the vehicle, Reduces ultraviolet rays transmitted through a control unit that determines whether the communication terminal is inside or outside the vehicle, based on whether the ultraviolet ray amount is greater than or equal to an ultraviolet ray threshold value, which is acquired through wireless communication with a communication terminal. And a window to be

  According to this configuration, the ultraviolet ray emitted from the sun can be detected by the ultraviolet sensor outside the passenger compartment. On the other hand, since the ultraviolet rays radiated by the sun are reduced by the window in the vehicle interior, the amount of ultraviolet rays detected by the ultraviolet sensor is also reduced. For this reason, the control unit can determine whether the communication terminal is in the vehicle compartment or outside the vehicle compartment based on whether the amount of ultraviolet rays is equal to or greater than the ultraviolet ray amount threshold. At this time, even in the vicinity of the window, which is the boundary between the vehicle interior and the exterior of the vehicle interior, ultraviolet rays are reduced inside the vehicle interior (vehicle interior), so it is possible to accurately determine the interior / exterior of the vehicle interior.

  In the vehicle communication system, the communication terminal transmits to the vehicle the first communication terminal having an ultraviolet sensor and the information on the amount of ultraviolet rays acquired by performing wireless communication with the first communication terminal. And a second communication terminal.

  According to this configuration, the amount of ultraviolet rays is detected by the ultraviolet sensor provided in the first communication terminal, and the amount of ultraviolet rays detected by the first communication terminal is transmitted to the vehicle via the second communication terminal. Then, the control unit of the vehicle can determine whether the first communication terminal and the second communication terminal are inside or outside the vehicle based on the ultraviolet ray amount.

In the above vehicle communication system, it is preferable that the control unit determines that the communication terminal is outside the passenger compartment when the ultraviolet ray amount is equal to or greater than the ultraviolet ray amount threshold value.
According to this configuration, when the amount of ultraviolet rays is equal to or greater than the ultraviolet ray amount threshold, it is determined that the communication terminal is outside the passenger compartment. On the other hand, when the ultraviolet ray amount is less than the ultraviolet ray amount threshold, it is not determined whether the communication terminal is inside or outside the vehicle interior, or is used as one information for determining.

  In the vehicle communication system, the control unit is configured to determine whether the communication terminal is inside or outside the vehicle interior based on a distance between the vehicle and the communication terminal that is calculated based on a received signal strength of a radio signal from the communication terminal. And determining whether the communication terminal is in a vehicle interior based on the received signal strength of a radio signal from the communication terminal, and when the ultraviolet ray amount is equal to or greater than the ultraviolet ray amount threshold, It is preferable to determine that the communication terminal is in the passenger compartment when the amount of ultraviolet rays is less than the threshold amount of ultraviolet rays.

  According to this configuration, in addition to determining whether the interior or exterior of the vehicle is based on the amount of ultraviolet light, determining whether the interior or exterior of the vehicle is based on the received signal strength of the wireless signal from the communication terminal allows the communication terminal to more accurately It can be determined which one is present.

  In the above vehicle communication system, the communication terminal is wirelessly connected to the outside, acquires information including date and time, the position of the communication terminal, and weather, and is based on the information including the date and time, the position, and the weather. Thus, it is preferable to calculate the ultraviolet light amount threshold at a predetermined cycle.

  Since the amount of ultraviolet rays changes depending on "date", "position", "weather", etc., the ultraviolet ray threshold is also determined in consideration of various information including "date", "position", "weather", etc. There is a need to. As a result, it is possible to determine a more accurate ultraviolet ray amount threshold according to the current situation.

  According to the vehicle communication system of the present invention, it can be determined more accurately whether the portable device is located outside or inside the vehicle interior.

(A) is a schematic diagram which shows the structure of one Embodiment of an electronic key system, (b) is a block diagram which shows the structure of one Embodiment of an electronic key system. The flowchart which shows the procedure of BLE determination and UV determination in the electronic key system in one Embodiment. The sequence chart which shows the procedure of UV determination in one Embodiment. The graph which shows the relationship between time and the amount of ultraviolet rays. The graph which shows the relationship between the weather and the amount of ultraviolet rays. (A) is a graph showing the relationship between the time at the winter A point and the amount of ultraviolet rays, (b) is a graph showing the relationship between the time at the summer A point and the amount of ultraviolet rays, and (c) is a winter B The graph which shows the relationship between the time in a point, and the amount of ultraviolet rays, (d) is a graph which shows the relationship between the time in the B point in summer and the amount of ultraviolet rays. (A) is a schematic diagram which shows the structure of other embodiment of an electronic key system, (b) is a block diagram which shows the structure of one Embodiment of an electronic key system.

Hereinafter, an embodiment of a vehicle communication system will be described.
As shown in FIGS. 1 (a) and 1 (b), the electronic key system 1 performs authentication of the smartphone 2 through wireless communication between the vehicle 2 and the smartphone 3 (portable device). It enables operation. Moreover, based on the information obtained by communicating between the smart phone 3 and the wearable device 4, control of the vehicle 2 by the smart phone 3 is permitted or regulated. The wearable device 4 has a wristwatch shape that can be worn on a body such as a wrist. The driver possesses the smartphone 3 and the wearable device 4. Further, the vehicle 2 is provided with a window W for reducing ultraviolet rays. As an example, ultraviolet (UV) cut glass is adopted for the window W. In the following description, it is assumed that the window W is closed unless otherwise specified.

  The vehicle 2 includes a control unit 20 that performs security control to suppress unauthorized operations on itself, a BLE communication unit 21 that transmits and receives BLE radio waves that are radio waves in the BLE (Bluetooth Low Energy) band, and a door provided in the host vehicle. The door lock mechanism 22 which performs the locking and unlocking is provided. The control unit 20 switches the locking / unlocking of the door provided in the vehicle by controlling the operation of the door lock mechanism 22 depending on whether the smartphone 3 is located inside or outside the vehicle interior.

  The smartphone 3 includes “weather” from the control unit 30 that controls the operation of the smartphone 3, the BLE communication unit 31 that transmits and receives BLE radio waves, the GPS positioning processing unit 32 that detects current position information of the smartphone 3, and the Internet 33a. An Internet communication unit 33 that acquires various types of information is provided. The GPS positioning processing unit 32 calculates the absolute coordinates of its current position based on information (time signal and orbit information) from the GPS satellite 32a. That is, the GPS positioning processing unit 32 can acquire the “date and time” and “position” information of the smartphone 3.

  The wearable device 4 includes a control unit 40 that controls the operation of the wearable device 4, a BLE communication unit 41 that transmits and receives BLE radio waves, and an ultraviolet sensor 42 that detects the amount of ultraviolet Iuv that reaches the wearable device 4. Here, as an example, a UV index is used as the ultraviolet ray amount Iuv. The UV index is an index of the amount of erythema ultraviolet rays in order to show the degree of influence of ultraviolet rays on the human body more easily. The amount of erythema ultraviolet rays is the amount of ultraviolet rays calculated in consideration of the degree of influence on the human body, which varies depending on the wavelength.

  BLE communication is performed between the BLE communication unit 21 of the vehicle 2 and the BLE communication unit 31 of the smartphone 3. Also, BLE communication is performed between the BLE communication unit 31 of the smartphone 3 and the BLE communication unit 41 of the wearable device 4. The smartphone 3 acquires the amount of UV Iuv detected by the UV sensor 42 via BLE communication with the wearable device 4. The wearable device 4 receives information such as the ultraviolet ray amount Iuv acquired from the smartphone 3, “date / time” / “position” information detected by the GPS positioning processing unit 32, and “weather” acquired by the Internet communication unit 33. , Transmitted to the vehicle 2 via BLE communication.

  The control unit 20 performs UV determination processing for determining whether the smartphone 3 (driver) is inside or outside the vehicle interior based on the ultraviolet ray amount Iuv acquired through the BLE communication unit 21. The control unit 20 determines that the smartphone 3 (driver) is located outside the vehicle compartment when the ultraviolet ray amount Iuv is greater than or equal to the ultraviolet ray amount threshold value. This is because when the wearable device 4 is outside the passenger compartment, it is considered that ultraviolet rays emitted from the sun directly hit the wearable device 4.

  On the other hand, when the ultraviolet ray amount Iuv is less than the ultraviolet ray amount threshold, the control unit 20 cannot determine whether the smartphone is inside or outside the vehicle interior, but estimates that the smartphone 3 is likely to be in the vehicle interior. Can do. The determination result of the UV determination can be used as one piece of information for confirming whether or not the result of the determination process inside or outside the vehicle interior performed between the smartphone 3 and the vehicle 2 is correct. Whether the smartphone is inside or outside the vehicle cannot be determined if the vehicle 2 and the driver are in a building where sunlight is blocked, such as an underground parking lot, This is because the amount Iuv may be less than the ultraviolet ray amount threshold.

  The ultraviolet light amount threshold value is determined each time based on information such as “date and time” and “position” detected by the GPS positioning processing unit 32 of the smartphone 3 and “weather” acquired by the Internet communication unit 33. The control unit 20 calculates the amount of ultraviolet rays that are expected to be detected based on the map indicating the relationship between “date and time”, “position”, and “weather” and the amount of ultraviolet rays. An ultraviolet light amount threshold is determined based on the expected ultraviolet light amount.

  Note that BLE determination is performed as other vehicle interior / exterior determination processing performed between the smartphone 3 and the vehicle 2. In the BLE determination, the distance between the vehicle 2 and the smartphone 3 is obtained based on the received signal strength of the BLE radio wave between the vehicle 2 and the smartphone 3, and the smartphone 3 is located outside the vehicle interior based on the distance. It is to determine whether there is. As an example, the BLE communication unit 21 calculates the received signal strength of the BLE radio wave transmitted by the BLE communication unit 31. And the control part 20 performs BLE determination based on the received signal strength of a BLE radio wave.

  The control unit 20 performs BLE determination and UV determination to determine whether the smartphone 3 is located inside or outside the vehicle interior, and thus determines where the driver carrying the smartphone 3 is.

Next, a procedure for determining whether the smartphone 3 is inside or outside the vehicle interior will be described.
As shown in FIG. 2, first, the control unit 20 determines whether or not the received signal intensity of the BLE radio wave is equal to or higher than a threshold value (step S1). That is, the control unit 20 performs BLE determination. In the BLE determination, it is determined whether the smartphone 3 is inside or outside the vehicle interior based on whether the received signal intensity of the BLE radio wave is equal to or higher than a threshold value. Note that the threshold value is the received signal strength of the BLE radio wave calculated by the BLE communication unit 21 when the BLE radio wave is transmitted from the BLE communication unit 31 when the smartphone 3 is in the vicinity of the window W that is a boundary portion outside and inside the vehicle interior. It is set based on the degree.

Next, when the received signal strength of the BLE radio wave is less than the threshold value (NO in step S1), the control unit 20 determines that the smartphone 3 is outside the passenger compartment (step S2).
On the other hand, when the received signal intensity of the BLE radio wave is equal to or greater than the threshold value (YES in step S1), the control unit 20 determines whether or not the ultraviolet ray amount Iuv is equal to or greater than the ultraviolet ray amount threshold value (step S3). That is, the control unit 20 performs UV determination. Originally, the control unit 20 determines that the vehicle is in the vehicle interior when the received signal intensity of the BLE radio wave is equal to or greater than the threshold value. Because.

  When the ultraviolet ray amount Iuv is equal to or greater than the ultraviolet ray amount threshold value (NO in step S3), the control unit 20 determines that the smartphone 3 is outside the passenger compartment (step S2). In the BLE determination, it is estimated that the smartphone 3 is in the vehicle interior, but in the UV determination, it is determined that the smartphone 3 is outside the vehicle interior.

  When the ultraviolet ray amount Iuv is less than the ultraviolet ray amount threshold value (YES in step S3), the control unit 20 determines that the smartphone 3 is in the passenger compartment (step S4). From the determination result of the UV determination, since the ultraviolet ray amount Iuv is less than the ultraviolet ray amount threshold value, it cannot be determined whether the smartphone 3 is inside or outside the vehicle interior. For this reason, it determines with the smart phone 3 being in a vehicle interior based on the determination result of BLE determination.

  Next, the procedure of UV determination will be described in detail with reference to FIG. Note that BLE communication between the smartphone 3 and the wearable device 4 is established by performing authentication between the smartphone 3 and the wearable device 4 in advance. Further, by performing authentication between the smartphone 3 and the vehicle 2 in advance, BLE communication between the smartphone 3 and the vehicle 2 is established.

  As shown in FIG. 3, first, the control unit 20 of the vehicle 2 requests the smartphone 3 to transmit the ultraviolet amount Iuv, and the smartphone 3 requests the wearable device 4 to transmit the ultraviolet amount Iuv. The wearable device 4 acquires the amount of UV Iuv by the UV sensor 42 (step S11). The wearable device 4 transmits the ultraviolet amount Iuv to the smartphone 3, and the smartphone 3 transmits the ultraviolet amount Iuv to the vehicle 2.

  The control unit 20 of the vehicle 2 requests the smartphone 3 to transmit “date / time” / “position” / “weather” information. The smartphone 3 acquires “date and time” and “position” information by the GPS positioning processing unit 32 (step S12). In addition, the smartphone 3 acquires “weather” information through the Internet communication unit 33 (step S13). The smartphone 3 transmits information on “date and time”, “position”, and “weather” to the vehicle 2.

The control unit 20 of the vehicle 2 determines an ultraviolet light amount threshold value based on the information of “date and time”, “position”, and “weather” (step S14).
The control unit 20 of the vehicle 2 determines whether the smartphone 3 is inside or outside the vehicle interior using the ultraviolet ray amount Iuv detected by the wearable device 4 and the determined ultraviolet ray amount threshold value (step S15).

  Next, a method for determining the ultraviolet ray amount threshold value will be described with reference to FIGS. The amount of ultraviolet rays (UV index) increases or decreases depending on various factors including “date and time”, “position”, “weather” and the like. For example, the amount of ultraviolet light detected during clear weather in the southern country at 12 o'clock in the summer is different from the amount of ultraviolet light detected during rainy weather in the north in the evening of winter. For this reason, the ultraviolet light amount threshold value is determined in consideration of various factors including “date and time”, “position”, “weather” and the like.

  FIG. 4 shows the relationship between the time (time of “date and time”) and the UV index. The solid line in FIG. 4 indicates the total amount of ultraviolet rays that reach the ground from the sun. The broken line in FIG. 4 represents the direct ultraviolet light among the ultraviolet rays that reach the ground from the sun. Note that the difference between the UV index indicated by the solid line and the UV index indicated by the broken line represents that due to scattered light among the ultraviolet rays that reach the ground from the sun. The time and the UV index have a relationship in which the UV index increases as it approaches from 12:00 in the morning to noon, and the UV index decreases from 12:00 in the daytime to nighttime. For this reason, when the smart phone 3 and the wearable device 4 are outside the vehicle, the ultraviolet ray amount Iuv detected by the ultraviolet sensor 42 is considered to be a larger value during the daytime and a smaller value during the morning and nighttime. In consideration of these matters, the control unit 20 sets the ultraviolet ray amount threshold value corresponding to the “date and time” (here, time) obtained by the smartphone 3 based on the relationship between the predetermined time and the UV index. To do. The ultraviolet light amount threshold value is set to a larger value during the daytime, and is set to a smaller value during the morning and at night.

  FIG. 5 shows the relationship between “weather” and the UV index. If the UV index detected during clear weather is used as a reference (100%), the amount of UV index detected in the order of clear, light cloudy, cloudy, and rain decreases. For example, the UV index detected when it is raining is about 30% of the UV index during clear weather. This is because ultraviolet rays emitted from the sun are blocked by factors such as the amount of cloud in the atmosphere, and the UV index detected on the ground becomes small. In consideration of these, the control unit 20 sets an ultraviolet light amount threshold value corresponding to “weather” obtained by the smartphone 3 based on a predetermined relationship between “weather” and the UV index.

  6A to 6D show the relationship between time and UV index for each season (summer and winter) at each point (point A and point B). 6 (a) and 6 (b) both show the relationship between the time at point A and the UV index. FIG. 6 (a) shows winter and FIG. 6 (b) shows summer. The relationship between the time at point A and the UV index is shown. Looking at these, the UV index detected during winter is generally smaller than the UV index detected during summer. Similarly for FIGS. 6C and 6D, the UV index detected in winter is generally smaller than the UV index detected in summer. Thus, the UV index changes not only according to the time but also according to the date (season). For this reason, the control part 20 sets the ultraviolet-ray amount threshold value corresponding to the "date and time" (month day) obtained by the smart phone 3, based on the relationship between the predetermined month and day and the UV index.

  FIGS. 6A and 6C show the relationship between the UV time and the time in winter, which is the same month and day (season). FIG. 6A shows the relationship between the time at point A and the time at point B in FIG. 6C and the UV index. Looking at this, the UV index detected at point A is generally smaller than the UV index detected at point B. Further, as shown in FIGS. 6B and 6D, the UV index detected at the point A even in summer is smaller than the UV index at the point B. That is, there is a regional difference in the detected UV index. For example, latitude and the ozone concentration in the atmosphere are related to this regional difference. For this reason, the control unit 20 sets an ultraviolet light amount threshold value corresponding to the “position” obtained by the smartphone 3 based on the relationship between a predetermined “position” (region) and the UV index.

  The control unit 20 estimates the UV index that is considered to be detected by the wearable device 4 based on the relationship between these “date and time”, “position”, “weather” and the UV index, and is estimated to be detected. An ultraviolet ray amount threshold is set based on the UV index. The ultraviolet ray threshold value is preferably set to a value smaller than the ultraviolet ray amount (UV index) estimated to be detected by the ultraviolet sensor 42. Further, for example, regarding “weather”, even when information that is clear in the weather forecast is acquired, it is conceivable that the ultraviolet ray amount Iuv is detected by the ultraviolet sensor 42 when the sun is just hidden by the clouds. Also from this point, it is preferable that the ultraviolet ray amount threshold is set to a value smaller than the ultraviolet ray amount estimated to be detected by the ultraviolet sensor 42.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) When determining whether the smartphone 3 is inside or outside the vehicle interior, it is possible to more accurately determine whether the smartphone 3 is outside or inside the vehicle interior by performing UV determination using the amount of ultraviolet rays. Can do. For example, when the ultraviolet ray amount Iuv is equal to or larger than the ultraviolet ray amount threshold value, it can be determined that the smartphone 3 is outside the passenger compartment. This UV determination is a determination using the fact that, for example, the amount of ultraviolet rays is reduced in the vehicle interior as compared to the outside of the vehicle interior by the window W employing UV cut glass. By performing the UV determination, it is possible to more accurately determine whether the smartphone 3 is inside or outside the vehicle interior. Therefore, control performed inside the vehicle interior (for example, engine start permission) and control performed outside the vehicle interior (for example, Locking / unlocking the door provided on the vehicle) can be executed more accurately.

  Further, in the case of UV determination, since the ultraviolet ray amount Iuv detected outside and inside the vehicle varies greatly depending on the window W, it is possible to more accurately determine the inside and outside of the vehicle based on whether the ultraviolet ray amount Iuv is equal to or greater than the ultraviolet ray amount threshold value. it can. In the vicinity of the window W, when determining the inside / outside of the vehicle interior based on the received signal intensity of the BLE radio wave, the distance hardly changes inside / outside the vehicle interior, so it is accurately determined whether the smartphone 3 is inside or outside the vehicle interior. It is difficult. However, in the UV determination, since the ultraviolet ray amount Iuv changes greatly inside and outside the vehicle interior, it can be easily and accurately determined whether the smartphone 3 is inside or outside the vehicle interior.

  (2) In addition to the UV determination, by adopting another method for determining the interior / exterior of the vehicle interior such as the BLE determination, it is possible to more accurately determine whether the smartphone 3 is inside or outside the vehicle interior. By complementing the determination result of the interior / exterior of the vehicle interior by the BLE determination with the determination result of the UV determination, it is possible to more accurately determine whether the smartphone 3 is inside or outside the vehicle interior.

  (3) The ultraviolet light amount threshold value is changed based on “date and time”, “position”, and “weather”. For this reason, based on whether or not the ultraviolet ray amount Iuv is equal to or larger than the ultraviolet ray amount threshold value, the inside / outside of the vehicle interior can be more accurately determined. For example, when the ultraviolet ray amount threshold value is determined based on the ultraviolet ray amount during the daytime, the ultraviolet ray amount Iuv during the evening is unlikely to be equal to or greater than the ultraviolet ray amount threshold value. For this reason, there is a possibility that the setting of the ultraviolet ray amount threshold value may be difficult. However, since the ultraviolet ray amount threshold value is set based on the current “date and time”, “position”, and “weather”, it is more appropriate for the current situation. It is possible to set an appropriate ultraviolet ray amount threshold value.

In addition, you may change this embodiment as follows. The following other embodiments can be combined with each other within a technically consistent range.
The wearable device 4 may be a wristwatch type worn on the wrist, a bracelet type, a ring type, a spectacle type, or the like.

  -Although the UV cut glass was employ | adopted for the window W as an example, it is not restricted to this. For example, a transparent resin material that blocks ultraviolet rays may be provided on the window W, or a material that blocks ultraviolet rays may be applied to the window by spraying. That is, any window W may be employed as long as it can block ultraviolet rays.

  -You may make it perform UV determination, when it determines with the smart phone 3 being in the vicinity of a vehicle by performing BLE determination. In addition, the control unit 20 acquires time series data of the ultraviolet ray amount Iuv when the driver carrying the smartphone 3 and the wearable device 4 gets on and off the vehicle from the wearable device 4, and based on the time series data, the vehicle interior and exterior May be determined.

  In addition to the UV determination, the BLE determination is used to determine whether the smartphone 3 is inside or outside the vehicle interior. However, it may be determined whether the smartphone 3 is outside or inside the vehicle interior only by the UV determination. In this case, the control unit 20 determines that the smartphone 3 is outside the vehicle compartment when the ultraviolet ray amount Iuv is greater than or equal to the ultraviolet ray amount threshold value, and if the ultraviolet ray amount Iuv is less than the ultraviolet ray amount threshold value, the smartphone 3 is in the vehicle interior. Judgment is made.

  -As shown to Fig.7 (a), (b), the smart phone 3 may be provided with the ultraviolet sensor 42. FIG. In this case, the wearable device 4 is not an essential component as the electronic key system 1. Then, the BLE communication unit 31 transmits “date and time”, “position”, “weather”, and the ultraviolet ray amount Iuv to the control unit 20 by BLE communication performed with the BLE communication unit 21.

  The wearable device 4 may be provided with the GPS positioning processing unit 32 and the Internet communication unit 33. In this case, the smartphone 3 is no longer an essential configuration as the electronic key system 1. The BLE communication unit 41 transmits “date and time”, “position”, “weather”, and the ultraviolet ray amount Iuv to the control unit 20 through BLE communication with the BLE communication unit 21. That is, any vehicle communication system that performs BLE communication (wireless communication) between a communication terminal including at least one of the smartphone 3 and the wearable device 4 and the vehicle 2 may be used.

  BLE using radio waves in the BLE band between the BLE communication unit 21 of the vehicle 2 and the BLE communication unit 31 of the smartphone 3 and between the BLE communication unit 31 of the smartphone 3 and the BLE communication unit 41 of the wearable device 4 Although communication was performed, it is not restricted to this. For example, instead of BLE band radio waves, LF (Low Frequency) band radio waves, UHF (Ultra High Frequency) band radio waves, or HF (High Frequency) band radio waves may be used. There may be.

As the ultraviolet ray amount Iuv obtained from the ultraviolet sensor 42, the ultraviolet ray amount may be used in addition to the UV index, or the erythema ultraviolet ray amount may be used.
The ultraviolet sensor 42 may detect UV-B (approximately 280 to 315 nanometers) having a shorter wavelength among ultraviolet rays, or UV-A (approximately 315 to 400 having a longer wavelength among ultraviolet rays). Nanometer) may be detected. The ultraviolet sensor 42 is not limited to UV-B and UV-A, and may detect ultraviolet rays in other wavelength bands.

  The relationship between “date and time”, “position”, “weather” and the UV index is preferably created with reference to UV-B data. This is because, compared with UV-A, UV-B has a stronger energy and is considered to have more influence on the human body such as sunburn. The window W is also preferably designed so as to reduce UV-B.

  -The UV light amount threshold value may be set to a fixed value based on various types of information including "date", "position", and "weather", and various types including "date", "position", and "weather" Regardless of the information, it may be set to a constant value.

  The ultraviolet light amount threshold value is determined based on “date and time”, “position”, and “weather”, but is not limited thereto. For example, the UV threshold is based on information such as absorption by stratospheric ozone, scattering by aerosol, scattering by air molecules, solar altitude, altitude, positional relationship between the vehicle 2 and the sun, shade by surrounding structures, solar activity status, etc. May be determined.

  DESCRIPTION OF SYMBOLS 1 ... Electronic key system, 2 ... Vehicle, 3 ... Smartphone, 4 ... Wearable device, 20 ... Control part, 21 ... BLE communication part, 22 ... Door lock mechanism, 30 ... Control part, 31 ... BLE communication part, 32 ... GPS Positioning processing unit, 32a ... GPS satellite (external), 33 ... Internet communication unit, 33a ... Internet (external), 40 ... control unit, 41 ... BLE communication unit, 42 ... UV sensor, W ... window, Iuv ... UV amount.

Claims (5)

In a vehicle communication system that performs wireless communication between a communication terminal and a vehicle,
The communication terminal includes an ultraviolet sensor that detects the amount of ambient ultraviolet rays,
The vehicle is a control unit that determines whether the communication terminal is inside or outside the vehicle, based on whether the ultraviolet ray amount is equal to or greater than an ultraviolet ray amount threshold value acquired through wireless communication with the communication terminal. When,
A vehicle communication system having a window for reducing transmitted ultraviolet rays. The vehicle communication system according to claim 1,
The communication terminal includes a first communication terminal having an ultraviolet sensor;
A vehicle communication system comprising: a second communication terminal that transmits information on the amount of ultraviolet rays acquired by performing wireless communication with the first communication terminal to the vehicle. The vehicle communication system according to claim 1 or 2,
The said control part is a vehicle communication system which determines that the said communication terminal is outside a vehicle interior, when the said ultraviolet-ray amount is more than the said ultraviolet-ray amount threshold value. The vehicle communication system according to claim 3,
The control unit determines whether the communication terminal is inside or outside the vehicle interior based on a distance between the vehicle and the communication terminal calculated based on a received signal strength of a radio signal from the communication terminal. ,
When it is determined that the communication terminal is in the passenger compartment based on the received signal strength of the radio signal from the communication terminal,
When the ultraviolet light amount is equal to or greater than the ultraviolet light amount threshold, it is determined that the communication terminal is outside the passenger compartment,
The vehicle communication system which determines that the said communication terminal exists in a vehicle interior, when the said ultraviolet-ray amount is less than the said ultraviolet-ray amount threshold value. In the vehicle communication system according to any one of claims 1 to 4,
The communication terminal is wirelessly connected to the outside, and acquires information including date and time, the position of the communication terminal, and weather,
The vehicle communication system which calculates the said ultraviolet-ray amount threshold value with the defined period based on the information containing the said date, the said position, and the said weather.

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