JP5640284B2 - In-vehicle electronic device and program - Google Patents

Description

  The present invention relates to an in-vehicle electronic device for notifying information related to an approach when a predetermined approach relation with a target position is reached, and performing an output for awakening the driver when there is a possibility of drowsy driving The present invention relates to electronic equipment and programs.

  In recent years, many speed measuring devices for measuring the speed of an automobile have been installed around the road. As an example of the speed measurement device, there is a device that emits a microwave of a predetermined frequency band toward a vehicle, receives the reflected wave, and measures the traveling speed of the vehicle. In order to detect the presence of such a velocity measuring device, a microwave detector configured to detect a microwave emitted from the velocity measuring device and output an alarm is conventionally known.

Also, some velocity measuring devices cannot be detected by conventional microwave detectors. As an example, there is a type in which a loop-shaped coil is embedded in the ground and a vehicle speed is determined while detecting the vehicle passing over the coil, as called a loop type. Others detect the speed of the vehicle using light other than microwaves. Therefore, when the current position acquired by GPS (Global Positioning System) etc. approaches the stored installation position (when a predetermined approach relationship is established), the installation position information of the speed measuring device is stored in advance. There is an in-vehicle electronic device such as a radar detector that issues a warning regardless of whether or not microwaves are detected (Patent Document 1).
For example, when the current position is within 1000 m from the installation position of the speed measurement device, the first warning is given, and when the current position is within 500 m from the installation position of the speed measurement device. Do a second warning, etc.

  As an additional function in an in-vehicle electronic device that notifies information about the approach when a predetermined approach relationship with such a target position is reached, the start of operation is the start of power supply to the in-vehicle electronic device by engine start Assuming that a certain period of time has elapsed, such as 30 minutes after the start of power supply to the on-vehicle electronic device when the engine is started, a warning such as “I am driving for a long time. Things are known.

JP 2008-64588 A

  However, since such an output is made only when a certain period of time has elapsed, it has not been possible to effectively prevent a drowsy operation.

  Therefore, the present invention has been made to solve such a problem, and relates to an in-vehicle electronic device that can effectively prevent a drowsy driving.

  In order to achieve the above-described object, an in-vehicle electronic device according to the present invention includes (1) a storage unit that stores target position information, a position acquisition unit that acquires a current position, a notification unit, and the position acquisition. In-vehicle equipped with control means for performing control to notify information about the approach from the notification means when the current position acquired by the means is in a predetermined approach relation with the target position stored in the storage means The electronic device includes an input unit that inputs a driving state, and an output unit that outputs an output for awakening the driver, and the control unit performs a dozing operation based on the driving state input by the input unit. It is determined whether or not there is a risk, and when it is determined that there is a risk of drowsy driving, control is performed to output from the output means to wake the driver.

  According to such a configuration, when a predetermined approach relation with the target position is reached, information about the approach is notified, and when it is determined that there is a risk of drowsy driving, the driver is awakened. Can be effectively prevented from falling asleep.

  Note that the input means may input the operating state from another device, or may be provided with a detecting means such as a sensor in its own device and input the operating state from the detecting means. For example, as another device, for example, the vehicle itself may be used, and the driving state may be input from an in-vehicle LAN used for controlling the vehicle itself, or may be input in connection with a sensor provided in the vehicle. Further, in the case where the detection unit is provided in the own device itself, the detection unit is, for example, a GPS receiver that detects the current position, a sensor that acquires speed and acceleration, or a sensor that detects the driver's own state. Good. As the driving state, for example, the state of the vehicle, the state of the driver itself, the state of the environment in the passenger compartment, and the like may be input. For example, an electroencephalogram may be detected by a sensor, and based on the electroencephalogram state, it may be determined whether or not there is a risk of dozing driving, and an output for calling attention may be performed.

  The danger of dozing driving may be, for example, that it is already in the dozing driving state, or may be in the state where it is likely to be in the dozing driving state.

  (2) The output means may output at least one of light, sound, vibration, gas, fragrance, and negative ions. According to such a configuration, when it is determined that there is a risk of drowsy driving, the driver can be effectively awakened. In particular, it is preferable to output a combination of at least two of these. As a method of outputting in combination, for example, the control unit may control to output two or more of them simultaneously, or the control unit may provide a time difference in output timing (time difference) It is also possible to control so that after one of the outputs, the other is output. In particular, the control means may perform control to determine which one of these is output and in what mode (for example, pattern, intensity, etc.) according to the degree of danger of dozing driving. .

  By outputting oxygen as negative ions, aroma, and gas, you can eliminate drowsiness, relax your passengers, eliminate irritation, and get tired. One of the causes of drowsiness is the effect of electromagnetic waves on the brain, so it is good to remove the electromagnetic waves with negative ions or to put substances that absorb the electromagnetic waves into the body.

  (3) The output for awakening the driver by the output means may be output in a mode with more changes than the notification of information on approach by the notification means. In this way, even if the notification about the approach is made but the driver does not wake up, the possibility that the driver wakes up is increased by the output for making the driver wake up. For example, the mode with a change can be realized by increasing the output intensity to awaken the driver as compared with the notification of the information related to the approach.

  (4) The notification unit includes a display unit that displays information on approach, and the input unit is a camera that captures a driver's state as the driving state, and the driver views the display surface of the display unit. The driver's face is oriented in a direction in which the driver's face can be photographed, and the control means is based on an image of the driver's face photographed by the camera as the driving state. It is good to determine whether or not there is.

  If it does in this way, a driver will look at a display part in order to check information about the approach, when it becomes a predetermined approach relation with a target position. When the driver is in a state where there is a danger of falling asleep, the driver tends not to look at the display unit in order to check the information related to the approach. Therefore, it is possible to easily determine whether or not there is a risk of the dozing driving based on the image of the driver's face taken by the camera as the driving state.

  Based on the image of the driver's face taken by the camera, a specific method for determining whether or not there is a risk of drowsy driving is based on, for example, the driver's head movement, eyelid movement, and line of sight It is good to judge.

  (5) Provided with an external camera that captures the outside of the vehicle separately from the camera that captures the state of the driver, the display unit displays an image of the external camera, and information on approach by the notification means This notification may be performed by overlapping and displaying on the video of the outward camera displayed on the display unit.

  The outward camera may be used as the input means, and the video of the outward camera may be in the driving state. For example, when the time from when a red signal is recognized from the image of the outward camera until the vehicle stops is greater than a predetermined reference value, the direction is controlled to indicate that there is a risk of doze driving described later. If the distance to the vehicle ahead is recognized from the video of the outward camera and the distance is closer than a predetermined reference value, there is a risk of doze driving described later. You may make it control the direction to perform.

  (6) It is good to provide the recording means which links | relates and records the image | video image | photographed with the camera which image | photographs the said driver | operator's state in the same time, and the image | video image | photographed with the said outward camera. In this way, the video of the person's face and the outside scene are recorded in the recording means in association with each other, so that when both videos recorded in the recording means are played back, there is a risk of drowsy driving The self state and the external state can be easily confirmed later. Therefore, the danger of dozing driving can be easily recognized, and the danger of dozing driving can be easily recognized.

  In particular, reproduction means for simultaneously reproducing the video photographed by the camera photographing the state of the driver at the same time recorded in the recording means and the video photographed by the outward camera based on the association. It is good to have.

  (7) The control unit includes a setting unit that sets whether to perform the notification of the information on the approach by the notification unit and the output for awakening the driver by the output unit, respectively, Based on the setting set in the setting means, it is preferable to perform notification of information related to the approach by the notification means and output control for awakening the driver by the output means.

  As a more specific configuration of the input unit and the control unit, for example, (8) to (12) may be used in addition to those described above. The input unit may be configured by combining at least two of the components of the input unit described above and the components described in (8) to (12).

  In (8) to (12), as a method of “controlling the direction in which there is a risk of drowsy driving”, for example, there is a risk of drowsy driving when the risk level exceeds the reference risk level. If the configuration is such that it is determined, various methods such as a method of performing a process for increasing the degree of risk can be employed.

  (8) The input means inputs the amount of carbon dioxide in the vehicle as the driving state, and the control means performs the dozing operation when the amount of carbon dioxide input by the input means is a predetermined value or more. It is better to control the direction of the danger.

  (9) The input means inputs information for estimating whether or not the driver is after eating as the driving state, and the control means is that the driver input by the input means is after eating When it is estimated that the driver is after eating based on the information for estimating whether or not he / she is in, it is preferable to control the direction that there is a risk of the drowsy driving.

  (10) The input means inputs a current time as the operation state, and the control means has a current time inputted by the input means of 3 am to 4 am, 6 am to 7 am, and 15:00. In any case of -16 o'clock, it is good to control the direction that there is a risk of the sleep driving.

  (11) The input unit inputs a vehicle speed as the driving state, and the control unit is configured to change the vehicle speed input by the input unit when a change amount within a predetermined time is smaller than a reference value. It is better to control the direction that there is a risk of drowsy driving.

  (12) The input means inputs a speed limit of a running road as the driving state, and the control means is configured to doze when the speed limit input by the input means is higher than a reference speed limit. It is better to control the direction that there is a risk of driving.

  (13) The input means inputs the age of the driver as the driving state, and the control means is the doze when the age input by the input means is 20's, 30's or 50's. It is better to control the direction that there is a risk of driving. And when it is not one of 20's, 30's, and 50's, it is good not to perform control in the direction that there is a risk of drowsy driving.

  (14) The input means inputs current weather as the driving state, and the control means has a risk of dozing operation when the current weather input by the input means is cloudy. It is better to control the direction. And when the present weather is not cloudy, it is good not to perform control in the direction that there is a risk of drowsy driving.

  (15) The input means inputs a distance to the destination as the driving state, and the control means is a risk of the dozing operation when the distance to the destination input by the input means is within 10 km. It is better to control the direction that there is. And when the distance to a destination is not less than 10 km, it is good not to perform control in the direction that there is a danger of dozing driving. For the input of the destination, for example, a general input method in the navigation apparatus may be used, or it may be registered in advance. In particular, when the destination is a place set as a home, it is preferable to perform control in a direction in which there is a risk of drowsy driving compared to a case where the destination is set at a place other than the home.

  (16) The input means inputs a driver's life log as the driving state, and the control means determines whether there is a risk of dozing driving taking into account the life log input by the input means. It is good to make a decision. For example, the life log may be input from a server connected to the Internet via a wireless communication network or the like, or may be input wirelessly or by wire from various portable devices that acquire the life log. You may make it acquire by connecting. The contents of the life log include, for example, sleeping state (for example, sleeping time zone information or information indicating whether or not symptoms of sleep apnea syndrome), exercise time zone information, meal time It is preferable to use band information, ecological information such as heart rate, drug drinking time zone and drug type (for example, antihistamine drinking status light).

  (17) The storage means stores, as the target position, a position where a snooze driving is likely to occur, and the control means is an approach to a place where a snoozing driving is likely to occur as information related to the approach. It is good to perform control to notify the information from the notification means.

In this way, it is possible to know in advance a place where a drowsy driving is likely to occur before passing. Therefore, drowsy driving can be prevented and consciousness can be made. This notification may be performed, for example, by displaying a mark at a corresponding position on a map, or by light from a lamp, electronic sound, voice, vibration, or the like.
When such notification is given, the control means may perform control in a direction in which there is no risk of sleep driving.

  (18) In addition, it is realizable as a program for making a computer implement | achieve the function as a control means in the vehicle-mounted electronic device in any one of (1)-(17).

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle-mounted electronic device which can prevent a dozing operation effectively can be provided.

It is a figure which shows the structure of the radar detector which is preferable one Embodiment of this invention. It is a block diagram of a radar detector. It is a figure which shows the example of a display of a standby screen, a radar scope, and a GPS alarm. It is a figure which shows the example of a display of the alarm screen in a radar wave alarm function. It is a figure which shows the example of a display of an approach warning setting screen. It is a figure which shows the example of a display of a dozing driving warning setting screen. It is a figure which shows the example of a display of an age setting screen.

  1 and 2 show the configuration of a radar detector which is a preferred embodiment as an in-vehicle electronic device according to the present invention. The radar detector is usually mounted on the dashboard. As shown in FIG. 1, this radar detector has a solar panel 2 and a switch unit 3 arranged on the upper surface of the case body 1, and the front side of the case body 1 (the side arranged on the front side of the vehicle (the windshield side)). Is provided with an outside camera 23 for photographing the front of the vehicle, a microwave receiver 4 for detecting microwaves in a frequency band emitted by the speed measuring device is disposed inside the front side, and the rear side of the case body 1 ( A display unit 5, an alarm lamp 6, an infrared communication device 7, a remote control receiver 16, and an in-vehicle shooting camera 21 for shooting the driver's face are arranged on the side arranged on the rear side of the vehicle (user side). Further, a GPS receiver 8 and a CO2 sensor 25 are arranged inside the upper surface side of the case body 1. Further, an adapter jack 9 is disposed on one side surface of the case body 1, and a power switch 10 and a DC jack (not shown) are disposed on the other side surface. A speaker 20 is also built in the case body 1. In the present embodiment, the display unit 5 is a 2.4 inch small liquid crystal display, and the height H on the rear side of the case body 1 on which the display unit 5 is mounted is set to be higher than the height H0 of other parts. Yes. The CO2 sensor 25 is a sensor that detects the amount of carbon dioxide. As the CO2 sensor 25, for example, a sensor using an infrared absorption method (NDIR) may be used.

  As shown in FIG. 2, the infrared communication device 7 transmits and receives data to and from a communication device incorporating an infrared communication device such as a mobile phone 12. The adapter jack 9 is a terminal for connecting the memory card reader 13. By connecting the memory card reader 13 to the adapter jack 9, data stored in the memory card 14 attached to the memory card reader 13 can be taken in. More specifically, the data stored in the memory card 14 includes update information such as information on a new target (position information including longitude and latitude, type information, etc.), and the update information passes through the control unit 18. Thus, the data is stored (downloaded) in the database 19 built in the apparatus and the data is updated. The function of the memory card reader 13 may be configured to be built in the main body case 1.

  The database 19 is a nonvolatile memory (for example, EEPROM) in the microcomputer of the control unit 18 or externally attached to the microcomputer. In the database 19, information related to a certain target is registered at the time of shipment, and data and the like regarding the target added after that can be updated as described above. Data update can also be performed via the infrared communication device 7.

  The DC jack is for connecting a cigar plug cord (not shown), and is connected to a cigar socket of the vehicle via the cigar plug cord so that power can be supplied. The wireless receiver 15 receives incoming radio waves having a predetermined frequency. The remote control receiver 16 performs data communication with a remote control (portable device: handset) 17 by infrared rays and performs various settings for the device. The switch unit 3 is also connected to the control unit 18 (not shown) so that the same setting as the remote controller 17 can be performed. The remote controller 17 includes a play button, a standby switching button, a setting button, a selection button, a cancel button, an enter button, and up / down / left / right cross buttons.

  The control unit 18 is a microcomputer including a CPU, ROM, RAM, nonvolatile memory, I / O, and the like. The various input devices (the GPS receiver 8, the microwave receiver 4, the wireless receiver 15, Predetermined processing is executed based on information input from the remote control receiver 16, the memory card reader 13, the infrared communication device 7, the in-vehicle shooting camera 21, the out-of-vehicle shooting camera 23, and the CO2 sensor 25), and an output device (display unit 5, A predetermined alarm / message is output using the alarm lamp 6 and the speaker 20). Note that these basic configurations can be basically the same as the conventional ones.

  The functions of the radar detector of the present embodiment are realized by being stored on the EEPROM of the control unit 18 as a program executed by the computer included in the control unit 18 and executed by the computer included in the control unit 18.

  Functions realized by the computer by the program of the control unit 18 include a GPS log function, a video display function, a video recording function, a video playback function, a standby screen display function, a video display function, a video recording function, a video playback function, and a radar scope. A display function, a GPS alarm function, a radar wave alarm function, a wireless alarm function, and the like can be given.

  The control unit 18 includes a GPS log function that stores the current position detected by the GPS receiver 8 every second in association with the detected time and speed (vehicle speed) as a position history in a nonvolatile memory. This position history may be recorded in the NMEA format, for example.

  The in-vehicle shooting camera 21 and the out-of-vehicle shooting camera 23 are CCD cameras capable of shooting even with a light of about 1 lux, and are internally connected to a USB port provided in the microcomputer of the control unit 18. The in-vehicle shooting camera 21 and the out-of-vehicle shooting camera 23 have a function of A / D converting an image captured by the CCD camera and sending it to the control unit 18 as image data. This function has the same configuration as a so-called USB camera. The control unit 18 compresses video data received from the in-vehicle shooting camera 21 and the outside shooting camera 23 on the display unit 5 and a non-volatile memory externally attached to the microcomputer of the control unit 18. A video recording function for recording and a video playback function for expanding the recorded video data and displaying it on the display unit 5 are provided. The video display function includes an out-of-vehicle camera video display function for displaying the video of the in-vehicle camera 23 and an in-vehicle camera video display function for displaying the video of the in-vehicle camera 21. Further, the control unit 18 analyzes the position of the driver's eyelid from the video data received from the in-vehicle shooting camera 21, determines the time when the eyelid is closed, and when the eyelid is closed for 1 second or more. The history of the time when the eyelids are closed and the time when the eyelids are closed are recorded in the nonvolatile memory. When the eyelid closing detection process for determining whether or not the eyelid is closed for 5 seconds or more and when the eyelid closed detection process detects that the eyelid is closed for 5 seconds or more, the siren sound is output at the maximum volume. A doze alarm process that is output from the speaker 20 is performed. These processes are realized by multitasking.

  The standby screen display function is a function for displaying the speed, latitude, longitude, and altitude of the host vehicle detected by the GPS receiver 8, as shown in FIG. As shown in FIG. 3 (b), the radar scope display function is a position where a target within a predetermined range (for example, within a range of about 1 km) from the current position detected by the GPS receiver 8 is stored in the database 19. This is a function of searching based on information and displaying the relative positional relationship between the vehicle position and the position of the target on the display unit 5. In FIG. 3B, “W” on the left side indicates the west, “E” on the right side indicates the east, and “N” on the upper side indicates the north direction, and the horizontal line connecting “W” and “E” and “N” The icon at the intersection of the vertical line extending downward from "" indicates the vehicle position. Icons having characters such as “L”, “RD”, “P”, and “N” indicate the type and position of the target.

  When pressing of a standby switching button provided on the remote controller 17 is detected during execution of the standby screen display function as shown in FIG. 3A, the radar scope display function is switched to as shown in FIG. Further, when pressing of the standby switch button provided on the remote controller 17 is detected during execution of the radar scope display function, the function is switched to the in-vehicle camera video display function. Further, when pressing of a standby switching button provided on the remote controller 17 is detected during execution of the in-vehicle camera image display function, the camera camera image display function is switched to the outside camera image display function. Then, when pressing of the standby switching button provided on the remote controller 17 is detected during execution of the outside camera video display function, processing for switching to the standby screen display function is performed.

  The control unit 18 performs a GPS alarm function, a radar according to an event that occurs during execution of a video display function, a standby screen display function, or a radar scope display function (hereinafter, these functions are collectively referred to as a standby function). The processing for realizing each function such as a wave alarm function and a radio alarm function is executed.

  The GPS alarm function obtains the distance between the target latitude and longitude stored in the database 19 and the current position detected by the GPS receiver 8 during execution of the standby function. In this process, when the approaching distance (for example, within 500 m) is reached, a message to that effect is displayed on the display unit 5 and an approach warning sound indicating the fact is output from the speaker 20.

  An approach warning setting function for setting whether or not to perform an approach warning is provided. That is, the control unit 18 sets whether or not to perform an approach warning based on an instruction input from the user, and performs an approach warning process based on the setting. Specifically, when the control unit 18 detects that the setting button of the remote control 17 is pressed for a short time (less than 1 second) via the remote control receiver 16, the approach warning setting screen shown in FIG. Display. When the operation of the upper button or the lower button of the cross button on the remote controller 17 is detected, the focus frame 51 is moved in the direction corresponding to the pressed button between “ON” and “NO”. Then, when pressing of the selection button of the remote controller 17 is detected, the check state of the radio button on the left side of the item surrounded by the focus frame 51 is set to ◎, while the item not surrounded by the focus frame 51 Set the check state of the radio button on the left side of to ○. The contents of the items set as ◎ when the determination button of the remote controller 17 is pressed are stored in the nonvolatile memory of the control unit 18 as the set value of the approach warning. For example, as shown in FIG. 5, when pressing of the determination button of the remote controller 17 is detected in a state where “Yes” is set to “◎”, “approach warning” is set as the approach warning setting value to the control unit 18. Stored in a non-volatile memory. Only when the set value of the approach warning stored in the non-volatile memory of the control unit 18 is “approach warning”, the above-described GPS alarm function is processed.

  For example, the approach warning set value stored in the nonvolatile memory of the control unit 18 is set to “approach warning”, and the target “L” (loop) in the upper part of the figure is displayed while the standby function is being executed. When the distance between the position of the vehicle and the vehicle position is 500 m, as shown in FIG. 3C, a schematic diagram of a loop coil as a target or data of a photograph is read from the database 19 While being displayed on the display unit 5, the voice data stored in the database 19 is read out, and an approach notification for outputting a voice “500 m ahead, loop coil” is performed from the speaker 20. During sound output, the alarm lamp 6 is turned on.

  Such targets include snoozing driving accident points, radar, speed limit switching points, control areas, inspection areas, parking monitoring areas, N systems, traffic monitoring systems, intersection monitoring points, signal ignorance suppression systems, police stations, frequent accidents Area, frequent on-board areas, sudden / continuous curve (highway), branch / merge point (highway), ETC lane advance guidance (highway), service area (highway), parking area (highway), highway Oasis (highway), smart interchange (highway), PA / SA petrol station (highway), tunnel (highway), highway radio reception area (highway), prefectural border notice, roadside station, viewpoint parking, etc. The type information of these targets, the latitude / longitude information indicating the position thereof, and the display on the display unit 5 Stored in the database 19 in association with the picture or photograph data and voice data.

  The snoozing driving accident point is a target indicating a point where an accident due to the snoozing driving has occurred in the past. When the distance between the snooze driving accident point and the vehicle position becomes 500 m during execution of the standby function, the schematic diagram or photo data of the snooze driving accident point as the target is read from the database 19. In addition, the voice data stored in the database 19 is read out, and an approach notification is output from the speaker 20 to output a voice saying "It is an accident occurrence point due to a drowsy driving". During sound output, the alarm lamp 6 is turned on. In this way, it is possible to know in advance a place where a drowsy driving is likely to occur before passing. Therefore, drowsy driving can be prevented and consciousness can be made.

  The radar wave warning function is used when the microwave receiver 4 detects a signal corresponding to a microwave in a frequency band emitted from a velocity measuring device (mobile radar or the like (hereinafter simply referred to as “radar”)). This is an alarm function for displaying an alarm screen on the display unit 5 and outputting an alarm sound from the speaker 20. For example, when a microwave in a microwave frequency band emitted by a radar is detected by the microwave receiver 4, as shown in FIG. 4, a schematic diagram or a photograph of the radar stored in the database 19 is displayed on the display unit 5. While being displayed as an alarm screen, the voice data stored in the database 19 is read out and a voice “Radar. Speed attention” is output from the speaker 20. During sound output, the alarm lamp 6 is turned on.

  The wireless alarm function is a function for issuing an alarm so that the wireless receiver 15 does not interfere with traveling or the like when a radio wave emitted by an emergency vehicle or the like is received. In the radio alarm function, enforcement radio, car radio, digital radio, special radio, police radio, police phone, police radio, wrecker radio, heli tele radio, fire helicopter radio, fire fight radio, emergency radio, expressway radio , Scan the frequency of the security radio, etc., and when the radio is received at the scanned frequency, a schematic diagram showing that the radio corresponding to the frequency stored in the database 19 for each radio type is received as an alarm screen While displaying on the display part 5, the audio | voice data memorize | stored for every radio | wireless classification in the database 19 are read, and the alarm sound which shows the radio | wireless classification from the speaker 20 is output. For example, when a control radio is received, a voice is output like “control radio. Speed attention”. During sound output, the alarm lamp 6 is turned on.

  In addition to these functions, the radar detector of the present embodiment has a drowsy driving warning function. The dozing operation warning function determines whether or not there is a risk of dozing driving based on the information input from the input device. This is a function to control and output for awakening the driver. The eyelid closing detection process and the dozing alarm process described above also constitute a part of the dozing operation warning function. The operation warning process can be set not to be executed.

  That is, a dozing operation warning setting function for setting whether or not to perform a dozing operation warning is provided. That is, the control unit 18 sets whether or not a dozing operation warning is performed based on an instruction input from the user, and performs a dozing operation warning process based on the setting. Specifically, when the control unit 18 detects that the setting button of the remote control 17 is pressed for a long time (2 seconds or more) via the remote control receiver 16, the control unit 18 displays the dozing operation warning setting screen shown in FIG. To display. When the operation of the upper button or the lower button of the cross button on the remote controller 17 is detected, the focus frame 51 is moved in the direction corresponding to the pressed button between “ON” and “NO”. Then, when pressing of the selection button of the remote controller 17 is detected, the check state of the radio button on the left side of the item surrounded by the focus frame 51 is set to ◎, while the item not surrounded by the focus frame 51 Set the check state of the radio button on the left side of to ○. The contents of the items set as ◎ when the determination button on the remote controller 17 is pressed are stored in the nonvolatile memory of the control unit 18 as the setting value of the dozing operation warning. For example, as shown in FIG. 6, when pressing of the enter button of the remote controller 17 is detected in a state where “Yes” is set to “◎”, “Dozing operation warning” is controlled as a set value of the dozing operation warning. Store in the nonvolatile memory of the unit 18.

The radar detector of this embodiment stores map data for car navigation in the database 19. As map data, data used for general navigation devices such as search data, road network data, and facility location data are stored. The road network data is data having a graph structure including nodes composed of position information on the road and links indicating the connection status between the nodes. The road network data of the present embodiment further stores the speed limit information of the road corresponding to the link in association with each link.
In the dozing driving warning process, the risk level indicating the danger level of the dozing operation is managed with a numerical value of 0 or more, and the warning is started when the risk level becomes 50 or higher.

  The dozing operation warning process is executed every second by interruption by a timer built in the microcomputer. In the dozing operation warning process, first, it is determined whether or not the set value of the dozing operation warning stored in the non-volatile memory of the control unit 18 is “warn dozing operation warning”. If the set value of the dozing operation warning is not “warming dozing operation”, the dozing operation warning process is terminated. When the set value of the dozing operation warning is “warn dozing operation warning”, the following risk level calculation processing is performed.

  In the risk calculation process, after setting (resetting) the risk to 0, it is determined whether or not the concentration of carbon dioxide detected by the CO2 sensor 25 is 1000 ppm or more. Add 10 to the risk every 200ppm. For example, in the case of 1000 ppm, 10 is added to the danger level, in the case of 1200 ppm, 20 is added, and in the case of 3000 ppm, 100 is added.

  Subsequently, the current time is acquired from the GPS receiver 8. When the acquired current time corresponds to any of 3 am to 4 am, 6 am to 7 am, and 15:00 to 16:00, 10 is added to the degree of risk.

Subsequently, the past two hours of the position history stored in the non-volatile memory by the GPS log function is searched for a place where the position history record is interrupted, and there is a place where the position history record is interrupted for 15 minutes or more. When the position recorded before the interruption corresponds to the position of the facility position data corresponding to the restaurant among the facility position data in the database 19, 10 is added to the risk level. This process corresponds to a process of estimating whether the driver is after a meal as a driving state.
Subsequently, the speed limit of the road corresponding to the current position acquired from the GPS receiver 8 is acquired from the database 19, and when the speed limit is 80 km or more, 10 is added to the risk level.

  Subsequently, it is determined whether or not the variation in speed (vehicle speed) in the past one minute of the position history stored in the non-volatile memory by the GPS log function is within a range of 10 km / h. Add 10 to the risk. For example, if the maximum speed in the past 1 minute is 85 km / h and the minimum speed in the past 1 minute is 80 km / h, the difference (variation) between the maximum value and the minimum value is 5 km / h. Add 10 to the degree. On the other hand, for example, when the maximum speed in the past 1 minute is 95 km / h and the minimum speed in the past 1 minute is 80 km / h, the difference (variation) between the maximum value and the minimum value is 15 km / h. Do not add to the risk level. Thus, control is performed in such a direction that there is a risk of falling asleep when the amount of change in the vehicle speed within a predetermined time is smaller than the reference value.

  Subsequently, the speed limit of the road corresponding to the current position acquired from the GPS receiver 8 is acquired from the database 19, and when the speed limit is 80 km or more, 10 is added to the risk level. As described above, when the speed limit is higher than the reference speed limit, it is preferable to control the direction in which there is a risk of the sleep driving.

  Subsequently, it is determined whether or not the current position acquired from the GPS receiver 8 is within a range of 1 km from the snooze driving accident point stored in the database 19. Add 10 to.

  Subsequently, the history of the time when the eyelids were closed and the time when the eyelids were closed recorded in the non-volatile memory was read out, the total time when the eyelids were closed within the past one minute was obtained, and the total value was multiplied by 15 Is added to the risk level. For example, when the past 1 minute includes a history of closing the eyelid for 1 second and a history of closing the eyelid for 2 seconds, 45, which is a value obtained by multiplying the total 3 seconds by 15, is added to the risk level. .

  Subsequently, it is determined whether or not the risk level calculated by the above risk level calculation process is 50 or more which is a reference value. If it is less than the reference value of 50, the doze driving alarm process is terminated. On the other hand, if the reference value is 50 or more, an alarm process is performed.

  The alarm process is a control process for performing an output for awakening the driver. Specifically, the warning lamp 6 blinks at high speed for 5 seconds, and the entire display unit 5 is drawn as red, black, red, black, etc., and further, a GPS alarm function, a radar wave alarm function, a radio alarm With a louder sound than the warning by the function, the speaker 20 outputs a sound “Please be careful about the drowsiness driving” following the electronic sound “beep and beep”.

  Thus, the position information of the target, which is target position information for the GPS alarm function, is stored in the database 19, and the control unit 18 acquires the current position from the GPS receiver 8 and acquires the current In a radar detector that performs control to notify information about the approach from the speaker 20, the alarm lamp 6, and the display unit 5 when the position becomes a predetermined approach relationship with the target position stored in the database 19, The control unit 18 inputs the driving state from the input device, determines whether or not there is a risk of dozing driving based on the driving state, and if it is determined that there is a risk of dozing driving, An output for awakening the person is performed from the speaker 20, the alarm lamp 6, and the display unit 5. Therefore, when a predetermined approach relationship with the target at the target position is reached, information about the approach is notified, and when it is determined that there is a risk of drowsy driving, an output for awakening the driver As a result, drowsy driving can be effectively prevented.

  In particular, the output for awakening the driver is a high-speed flashing of the alarm lamp 6, the change in the color of the display unit 5, and the output with a louder sound than the alarm by the GPS alarm function. For example, in order to wake up the driver even in a situation where the driver does not wake up even if a notification about approach to the target is made by the GPS warning function. This increases the possibility that the driver will wake up, and can more effectively prevent the driver from falling asleep.

  The in-vehicle shooting camera 21 is arranged in such a direction that the driver's face can be photographed when the driver looks at the display surface of the display unit 5. Based on the photographed image of the driver's face, it is determined whether there is a risk of drowsy driving. The driver views the display unit 5 in order to confirm the alarm content by the GPS alarm function and the screen display content by the radar scope function. On the other hand, when the driver is in a state where there is a risk of falling asleep, there is no tendency to check the alarm content by the GPS alarm function or the screen display content by the radar scope function, and the display unit 5 tends not to be seen. Therefore, it is possible to easily determine whether or not there is a risk of drowsy driving based on the image of the driver's face taken by the in-vehicle camera 21 as the driving state.

  In this embodiment, as a specific method for determining whether there is a risk of drowsy driving based on the image of the driver's face taken by the in-vehicle camera 21, the determination is based on eyelid movement. However, for example, the determination may be made based on the driver's head movement and line of sight.

  In this embodiment, the driving state is input from an input device provided in the radar detector, but may be input from the vehicle itself, for example. For example, the driving state may be input from an in-vehicle LAN used for controlling the vehicle itself, or may be input by connecting to a sensor provided in the vehicle. Moreover, you may make it acquire a driving | running state from the sensor with which the driver | operator himself / herself was equipped, for example. For example, an electroencephalogram may be detected by a sensor, and based on the electroencephalogram state, it may be determined whether or not there is a risk of dozing driving, and an output for calling attention may be performed.

  Further, in this embodiment, the output for awakening the driver is performed by sound from the speaker 20 and by light from the alarm lamp 6 and the display unit 5. For example, the vibration motor is driven to generate vibration. Alternatively, a cylinder that generates a gas such as oxygen or a scent may be provided to control a valve of the cylinder, or a negative ion generator may be controlled to generate negative ions. As the negative ion generator, for example, a negative ion generator such as a Leonard type, a corona discharge type, an electron emission type, or a radioactive substance use type may be used. According to such a configuration, when it is determined that there is a risk of drowsy driving, the driver can be effectively awakened. In particular, it is preferable to output a combination of at least two of these. As a method of outputting in combination, for example, the control unit 18 may control to output two or more of them at the same time, or the control unit 18 provides a time difference in output timing ( A time difference may be provided), and control may be made so that after one of the outputs, the other is output. In particular, the control unit 18 may perform control to determine which one of these is to be output and in what mode (for example, pattern, intensity, etc.) according to the calculated risk. For example, it is better to perform control to increase the output intensity and output time as the degree of danger increases.

  If oxygen or the like is output as negative ions, aroma, or gas, sleepiness can be eliminated, passengers can be relaxed, annoyance can be eliminated, and fatigue can be obtained. One of the causes of drowsiness is the effect of electromagnetic waves on the brain. Therefore, it removes electromagnetic waves by emitting negative ions, and removes substances that absorb electromagnetic waves from the bottom, side, and rear of the case body 1 (display 5 side). It can also be installed in the body.

  In this embodiment, the alarm by the GPS alarm function is performed by displaying a schematic diagram or a photograph as shown in FIG. 3B. For example, the display unit 5 is photographed by the outside camera 23. A video may be displayed and displayed on the video. For example, the control unit 18 performs processing for superimposing and displaying the characters “Loop Coil Caution” at the center of the video.

  The video recording function for compressing and recording video data in a nonvolatile memory externally attached to the microcomputer of the control unit 18 includes, for example, video data of the in-vehicle camera 21 and video data of the outside camera 23 at the same time. You may make it synchronize and synthesize | combine and record on one video data. You may make it record as what is called multi-angle data. In this way, the video of the person's face and the outside scene are recorded in association with each other. By playing both recorded images, the state of the person and the outside when there is a risk of dozing Can be easily confirmed later. Therefore, the danger of dozing driving can be easily recognized, and the danger of dozing driving can be easily recognized.

Alternatively, the video data of the in-vehicle camera 21 and the video data of the outside camera 23 at the same time recorded separately may be reproduced and displayed on the display unit 5 in synchronization. For example, when a playback button is provided on the remote controller 17 and the control unit 18 detects that the playback button has been pressed, the video of the outside camera 23 is displayed on the right side of the display unit 5, and the in-vehicle camera is displayed on the left side of the display unit 5. Control to reproduce and display the 21 images may be performed.
The risk level calculation by the risk level calculation process can be performed in consideration of various factors.

  For example, when the control unit 18 detects that the setting button of the remote control 17 is continuously pressed twice via the remote control receiver 16, the control unit 18 displays the age setting screen shown in FIG. 7 on the display unit 5. When the pressing of the upper button of the cross button of the remote controller 17 is detected, the value of the age display 52 is incremented by 1, and when the pressing of the lower button is detected, the value of the age display 52 is decreased by one. Then, the value of the age display 52 when the determination button of the remote controller 17 is pressed is stored in the nonvolatile memory of the control unit 18 as the age setting value. And the control part 18 may be made to perform the process which adds a danger, when the set age is 20's, 30's, 50's. If it is not in the 20's, 30's or 50's, the risk level addition process should not be performed.

  In addition, the control unit 18 may recognize the weather from the video data acquired from the outside camera 23 and perform a process of adding the degree of danger when the weather is cloudy. And when the present weather is not cloudy, it is good not to perform the process which adds a danger degree.

  Further, the control unit 18 sets a destination by the same processing as that of a general navigation device, and performs a process of adding a risk when the distance to the set destination is within 10 km from the current position. Good. Then, when the distance from the current position to the destination is not within 10 km, it is preferable not to perform the process of adding the degree of risk. In particular, when the destination is a place set as a home, it is preferable to perform a process of adding more risk than when set at a place other than the home.

  In addition, the control unit 18 may perform a process of acquiring a life log from the mobile phone 12 via the infrared communication device 7 and add the degree of risk in consideration of the acquired life log. The input of the life log may be input from a server connected to the Internet via a wireless communication network or the like, or may be input wirelessly with various portable devices that acquire the life log. You may make it acquire by connecting with a wire communication. The contents of the life log include, for example, sleeping state (for example, sleeping time zone information or information indicating whether or not symptoms of sleep apnea syndrome), exercise time zone information, meal time It is preferable to use band information, ecological information such as a heart rate, a medicine drinking time zone and a medicine type (for example, an antihistamine drinking state). For example, when the sleep time is less than a predetermined value, the risk level may be added.

  Further, for example, when the current date acquired from the GPS receiver 8 corresponds to the onset time of hay fever, the direction control is performed so as to give a warning for awakening, such as adding the risk of falling asleep. It may be.

  In addition, for example, when the time from when the red signal is recognized from the image taken by the camera 23 outside the vehicle to when the vehicle stops is greater than a predetermined reference value, the risk of dozing driving may be added. Then, the distance from the vehicle ahead may be recognized from the image of the outward camera, and the risk may be added when the distance is closer than a predetermined reference value.

  In this embodiment, the alarm process is performed when the risk level is increased and exceeds a predetermined reference value. However, the alarm is performed by controlling the direction that there is a risk of drowsy driving. The method for determining the processing is not limited to this, and various methods can be adopted. For example, given a certain point in advance, when a state where there is a danger of falling asleep as a driving state is detected, if this point is below a reference value, an alarm process is performed, Alarm processing may be performed by fuzzy control, or alarm processing may be performed by comprehensively evaluating the type of operation state.

  In the present embodiment, as a drowsy driving accident point, it is decided to memorize a target indicating a point where an accident caused by a drowsy driving has occurred in the past and perform an approach warning. For example, pavement for preventing drowsy driving It is also possible to store an immediately before the road section where the error is made, etc., as a frequent driving point of drowsiness, and issue an approach warning. In addition, it is detected from the vibration pattern and noise pattern of the vehicle that it is traveling on the pavement area for preventing drowsy driving, and it is notified by notifying the voice that “passing through the pavement zone preventing drowsy driving”. Also good.

  In the present embodiment, the radar detector has been described as an example. However, the present invention can be implemented as a function of various in-vehicle electronic devices. For example, you may incorporate as a function of a navigation apparatus, a drive recorder, and a car audio. In addition, the numerical values described in the present embodiment may be appropriately changed to values that exhibit an effect through experiments and the like.

DESCRIPTION OF SYMBOLS 1 Case main body 2 Solar panel 4 Microwave receiver 5 Display part 6 Lamp 7 Infrared communication device 8 GPS receiver 9 Adapter jack 10 Power switch 11 Mobile phone 12 Memory card reader 14 Memory card 15 Wireless receiver 16 Remote control receiver 17 Remote control 18 Control unit 19 Database 20 Speaker 21 In-vehicle camera 23 Outside camera 25 CO2 sensor 51 Frame frame 52 Age display

Claims (7)

Memorize the target location information,
An electronic device that performs control based on current position information and the target position information, so that when the current position is in a predetermined approach relationship with the target position, information about the approach is notified from a notification unit. ,
An input means for inputting the operating state;
Based on the driving state input by the input means, it is determined whether there is a risk of doze driving, and when it is determined that there is a risk of dozing driving, for awakening the driver from the output means Comprising control means for performing output control,
The input means is a camera that captures the state of the driver as the driving state, and is arranged with a direction in which the driver's face can be captured when the display surface of the display unit is viewed by the driver. ,
The control means determines whether or not there is a risk of the dozing driving based on whether or not the driver is looking at a display unit, which is obtained from the image of the driver's face taken by the camera as the driving state. It has a function to determine whether
When the current position is in a predetermined approach relationship with the target position and the driver has a tendency not to look at the display when the information about the approach is notified by sound and display , An electronic device characterized as being at risk. As the input means, an external camera is provided,
The electronic device according to claim 1 , wherein the control unit determines whether or not there is a risk of the dozing driving based on an image taken by the outward camera. The control means determines that there is a risk of dozing driving when the time from when a red signal is recognized from the image of the outward camera until the vehicle stops is greater than a reference value. The electronic device according to claim 2 . The said control means recognizes the distance with a front vehicle from the image | video of the said outward camera, and determines whether there exists a risk of the dozing driving based on the distance with the said front vehicle. Item 4. The electronic device according to Item 2 or 3 . To display the image taken by the front Symbol outside for the camera on the display unit,
The information notification regarding access by information means, electronic apparatus according to claims 2 to one of 4, which comprises carrying out and displayed superimposed on the image of the outbound camera displayed on the display unit. Storage means for storing the target position information;
Position acquisition means for acquiring the current position information;
The notification means;
The electronic device according to any one of claims 1 to 5, characterized in that it comprises an output means for the output for waking the driver. The program for making a computer implement | achieve the function as a control means in the electronic device in any one of Claim 1 to 6 .

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