JP2015108955A - Drive support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive support device capable of precisely detecting congestion state on a road in real time.SOLUTION: A drive support device 10 includes: a detection section 1 that detects a distance K1 from a preceding vehicle 31 in a detection range; a receiving section 2 that receives road traffic information from the outside; an input section 3 to which a piece of speed information is input from a speed meter 22 of own vehicle; and a determination section 4 that, when the detection section 1 detects a distance K1, determines whether the road is congested based on the road traffic information received by the receiving section 2 and the speed information input from the input section 3. The determination section 4 is configured to determine as the road is congested when the road traffic information received by the receiving section 2 is the congestion information and when the speed information input to the input section 3 is equal to or smaller than a predetermined speed.

Description

  The present invention relates to a driving support device.

  Conventionally, an obstacle detection device that can detect a two-wheeled vehicle passing through a side region of the host vehicle has been proposed (see, for example, Patent Document 1). Patent Document 1 describes that this obstacle detection device is applied to a driving support system.

  The above-described driving support system includes external communication means for receiving road traffic congestion information from a fixed station for VICS (registered trademark) Vehicle Information and Communication System (road traffic information communication system) service.

JP 2008-299562 A

  In the above-described driving support system, the traffic congestion information on the road from the fixed station for VICS (registered trademark) service is received by the external communication means, so that it is possible to determine from where the traffic is about the road on which the vehicle is traveling. It becomes possible to detect.

  However, in the above-described driving support system, it is difficult to more accurately detect the traffic congestion situation on the road on which the host vehicle is traveling in real time.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a driving support apparatus capable of more accurately detecting a traffic jam situation in real time.

  The driving support device of the present invention includes a detection unit that detects a distance from a preceding vehicle within a detection range, a reception unit that receives road traffic information from the outside, an input unit that receives speed information of the host vehicle, When the distance is detected by the detector, it is determined whether the road is congested based on the road traffic information received by the receiver and the speed information input to the input unit. The determination unit, the road traffic information received by the receiving unit is traffic jam information, and when the speed information input to the input unit is below a predetermined speed, It is characterized by determining that the road is congested.

  In this driving support device, the determination unit is configured to determine that the traffic congestion on the road has been eliminated when the distance is not detected by the detection unit after determining that the road is in traffic jam. It is preferable.

  In this driving support apparatus, the determination unit is configured to determine which range of the three preset ranges the distance detected by the detection unit belongs to, and the three ranges are: A first range from a shortest detection distance by the detection unit to a first distance longer than the shortest detection distance; a second range from the first distance to a second distance longer than the first distance; and the second The third range from the distance to the longest detection distance by the detection unit is set, and the determination unit determines that the distance detected by the detection unit after the determination that the road is congested is the first range. It is preferable to be configured to determine that the traffic congestion on the road has been alleviated when the vehicle belongs to the second range or the third range.

  In this driving support device, the determination unit determines that the traffic jam starts when the road traffic information received by the reception unit is the traffic jam information and the distance is detected by the detection unit. It is preferable that it is comprised.

  The driving support device further includes a first control unit that controls any one of an accelerator, a brake, and a hazard lamp, and the first control unit is configured based on a determination result by the determination unit. It is preferable to be configured to control the controlled object.

  The driving support device may further include a second control unit that controls the acoustic device, and the second control unit is configured to control the acoustic device based on a determination result by the determination unit. preferable.

  When the distance is detected by the detection unit, the driving support device according to the present invention is based on the road traffic information received by the reception unit and the speed information input to the input unit. A determination unit for determining whether or not the vehicle is congested is provided. In the driving support device of the present invention, when the determination unit has the traffic information received by the receiving unit as traffic jam information and the speed information input to the input unit is equal to or lower than a predetermined speed. In addition, the road is determined to be congested. Therefore, in the driving support device of the present invention, it is possible to detect the traffic congestion situation on the road more accurately in real time.

It is a schematic block diagram of the driving assistance device of Embodiment 1. 4 is a flowchart illustrating an example of an operation of the driving support apparatus according to the first embodiment. It is explanatory drawing when the traffic congestion of a road is eliminated regarding the driving assistance apparatus of Embodiment 1. FIG. It is explanatory drawing when the traffic congestion of a road is eased regarding the driving assistance apparatus of Embodiment 1. FIG. It is explanatory drawing when it has stopped about the driving assistance apparatus of Embodiment 1 by the traffic congestion of a road. It is explanatory drawing when the traffic congestion of a road is started regarding the driving assistance apparatus of Embodiment 1. FIG. It is a schematic block diagram of the driving assistance device of Embodiment 2. 6 is a flowchart illustrating an example of an operation of the driving support apparatus according to the second embodiment.

(Embodiment 1)
Hereinafter, the driving assistance apparatus 10 of this embodiment is demonstrated, referring FIGS.

  The driving support device 10 is mounted on a vehicle 30 (see FIG. 3) such as an automobile, for example. Hereinafter, for convenience of explanation, the vehicle 30 on which the driving support device 10 is mounted is referred to as the host vehicle 30.

  The driving support device 10 detects the road traffic information from the detection unit 1 that detects the distance K1 between the preceding vehicle 31 and the host vehicle 30 within the detection range H0 (see FIG. 3), and the VICS (registered trademark) center 21. And a receiving unit 2 for receiving. The driving support device 10 also includes an input unit (first input unit) 3 to which speed information is input from the speedometer 22 of the host vehicle 30. In addition, the driving support device 10 detects the vehicle based on the road traffic information received by the receiving unit 2 and the speed information input to the first input unit 3 when the distance K1 is detected by the detecting unit 1. The determination part 4 which determines whether the road which 30 drive | works is in traffic jam is provided. The VICS (registered trademark) center 21 means a Japanese road traffic information communication system center. VICS (registered trademark) is an abbreviation for Vehicle Information and Communication System. VICS is a registered trademark. Hereinafter, the front vehicle 31 is referred to as another vehicle 31 for convenience of explanation. Hereinafter, for convenience of explanation, a road on which the host vehicle 30 travels is simply referred to as a road.

  The detection unit 1 receives an ultrasonic sensor 5 that transmits an ultrasonic wave and receives a reflected wave from another vehicle 31, and a received signal corresponding to the reflected wave received by the ultrasonic sensor 5. And a second input unit 6. In addition, the detection unit 1 includes a calculation unit 7 that calculates a distance K <b> 1 with the other vehicle 31 based on the received signal input to the second input unit 6.

  The ultrasonic sensor 5 is disposed on the front side (right side in FIG. 3) of the host vehicle 30 so as to transmit ultrasonic waves toward the other vehicle 31.

  The second input unit 6 includes an amplifier (not shown) that amplifies the received signal from the ultrasonic sensor 5. The second input unit 6 is configured to appropriately amplify the received signal from the ultrasonic sensor 5 using an amplifier.

  The calculation unit 7 is configured to calculate the distance K1 from the host vehicle 30 to the other vehicle 31 when the received signal from the ultrasonic sensor 5 is input to the second input unit 6. In addition, the calculation unit 7 calculates a time from when the ultrasonic wave is transmitted from the ultrasonic sensor 5 to when the ultrasonic wave is received by the ultrasonic sensor 5 (hereinafter, “propagation time”). The distance K1 is calculated based on the above. As the calculation unit 7, for example, a calculation unit provided in advance in a microcomputer can be used. For example, a configuration including a multiplier, an adder, and a divider can be employed for the calculation unit.

  By the way, the speed (namely, sound speed) c [m / s] at which sound travels in the air can be obtained by the following equation (1), where the temperature in the air is X [° C.].

  Therefore, the distance K1 [m] can be obtained by the following equation (2) when the propagation time is Z1 [s].

  The calculation unit 7 can calculate the distance K1 by using the above-described arithmetic expressions (1) and (2). Therefore, the detection unit 1 can detect the distance K1 with the other vehicle 31 within the detection range H0. Note that the temperature X in the air may be measured using, for example, a temperature sensor.

  Here, in the driving assistance device 10, the detection unit 1 includes the ultrasonic sensor 5. However, the detection unit 1 is not particularly limited. For example, the detection unit 1 is provided in advance in the host vehicle 30 without including the ultrasonic sensor 5. An ultrasonic sensor or the like may be used.

  The receiving unit 2 is a road distributed from the VICS (registered trademark) center 21 via a transmitter (for example, a radio beacon, an optical beacon, etc.) installed above a road (for example, an expressway, a general road). It is configured to receive traffic information. As the receiving unit 2, for example, a receiving device that can receive road traffic information transmitted from a radio wave beacon and an optical beacon may be used. As this type of receiving apparatus, for example, an integrated antenna apparatus described in JP-A-2006-279344 can be used.

  The receiving unit 2 is configured to output the received road traffic information to the determining unit 4.

  The first input unit 3 is configured such that speed information indicating the speed of the host vehicle 30 is input from the speedometer 22. The first input unit 3 is configured to output the input speed information to the determination unit 4.

  The determination unit 4 includes a first determination unit 8 that determines whether or not the distance K1 is detected by the detection unit 1. The determination unit 4 determines that the road is congested based on the road traffic information received by the reception unit 2 and the speed information input to the first input unit 3 when the distance K1 is detected by the detection unit 1. The 2nd determination part 9 which determines whether it is in is provided. As the first determination unit 8 and the second determination unit 9, for example, a determination unit provided in advance in the microcomputer can be used. Examples of the determination unit include a comparator.

  The 2nd determination part 9 is comprised so that the determination result by the 1st determination part 8 may be input. The second determination unit 9 is configured such that road traffic information from the reception unit 2 is input. Further, the second determination unit 9 is configured to receive speed information from the first input unit 3.

  The second determination unit 9 is configured to determine whether or not the road traffic information received by the reception unit 2 is traffic jam information. The second determination unit 9 is configured to determine whether or not the speed information input to the first input unit 3 is equal to or lower than a predetermined speed. In the present embodiment, a predetermined speed is preset in the second determination unit 9. The second determination unit 9 selects a first predetermined speed (for example, 40 [km / h]) as the predetermined speed when the road traffic information received by the receiving unit 2 relates to information on the highway. When the road traffic information received by the receiving unit 2 relates to general road information, the second determination unit 9 selects a second predetermined speed (for example, 20 [km / h]) as the predetermined speed. The first predetermined speed and the second predetermined speed are stored, for example, in a storage unit provided in advance in the microcomputer.

  In addition, the second determination unit 9 is congested when the road traffic information received by the receiving unit 2 is traffic jam information and the speed information input to the first input unit 3 is a predetermined speed or less. It is comprised so that it may determine. In other words, when the road traffic information received by the receiving unit 2 is traffic jam information and the speed information input to the first input unit 3 is equal to or lower than a predetermined speed, the determination unit 4 is in a traffic jam. It is configured to determine that there is.

  Hereinafter, with respect to the driving support device 10 of the present embodiment, an operation for detecting the traffic congestion state of the road will be briefly described with reference to FIG.

  In the driving assistance device 10, when the driving assistance device 10 is activated (S1 in FIG. 2), the ultrasonic sensor 5 is activated by the detection unit 1 (S2 in FIG. 2), and the ultrasonic sensor 5 is Sound waves are transmitted for a first specified time (for example, 250 [μs]).

  The determination unit 4 determines whether or not the distance K1 is detected by the detection unit 1 after the ultrasonic wave is transmitted by the ultrasonic sensor 5 (S3 in FIG. 2). In the driving support device 10, when the distance K1 is detected by the detection unit 1, the road traffic information received by the reception unit 2 and the speed information input to the first input unit 3 are input to the determination unit 4 ( S4 in FIG. Moreover, in the driving assistance apparatus 10, when the distance K1 is not detected by the detection unit 1 and the first specified time has elapsed, the ultrasonic sensor 5 is stopped by the detection unit 1 (S7 in FIG. 2).

  The determination unit 4 determines whether the road is congested based on the road traffic information received by the reception unit 2 and the speed information input to the first input unit 3 (S5 in FIG. 2). ). The determination unit 4 determines that the road is congested when the road traffic information received by the reception unit 2 is traffic jam information and the speed information input to the first input unit 3 is equal to or less than a predetermined speed. (S6 in FIG. 2). In the driving support device 10, after the determination unit 4 determines that the road is congested, the detection unit 1 stops the ultrasonic sensor 5 (S7 in FIG. 2).

  The determination unit 4 determines that the road is not congested when the road traffic information received by the receiving unit 2 is traffic jam information and the speed information input to the first input unit 3 is not less than a predetermined speed. . In the driving support device 10, when the determination unit 4 determines that the road is not congested and the first specified time has elapsed, the detection unit 1 stops the ultrasonic sensor 5 (S7 in FIG. 2).

  Further, in the driving support device 10, when the second specified time (for example, 200 [ms]) has elapsed after the ultrasonic sensor 5 is stopped, the ultrasonic sensor 5 is activated again by the detection unit 1 ( S2 in FIG.

  The driving support device 10 of the present embodiment described above receives the road traffic information from the detection unit 1 that detects the distance K1 with the preceding vehicle 31 within the detection range H0 and the outside (VICS (registered trademark) center 21). Receiving section 2 and an input section 3 into which speed information of the host vehicle 30 is input. Further, when the distance K1 is detected by the detection unit 1, the driving support device 10 detects that the road is congested based on the road traffic information received by the reception unit 2 and the speed information input to the input unit 3. The determination part 4 which determines whether it is in is provided. The determination unit 4 determines that the road is congested when the road traffic information received by the receiving unit 2 is traffic jam information and the speed information input to the input unit 3 is equal to or lower than a predetermined speed. It is configured to determine. Thereby, in the driving assistance apparatus 10, it becomes possible to detect the traffic congestion situation of the road on which the host vehicle 30 travels more accurately in real time.

  The first determination unit 8 is configured to determine the road condition after the second determination unit 9 determines that the road is congested. In other words, the first determination unit 8 is configured to re-determine the traffic congestion state after the second determination unit 9 determines that the road is congested. Specifically, the first determination unit 8 is configured to determine whether the distance K1 is detected by the detection unit 1 after the second determination unit 9 determines that the road is congested. ing.

  The first determination unit 8 is configured to determine that the road congestion has been eliminated when the distance K1 is not detected by the detection unit 1 after the second determination unit 9 determines that the road is congested. Yes. In other words, the determination unit 4 is configured to determine that the traffic congestion on the road has been eliminated when the distance K1 is not detected by the detection unit 1 after determining that the road is in traffic congestion.

  In the driving support device 10, after the determination unit 4 determines that the road is congested, when the distance K1 is not detected by the detection unit 1, it is determined that the road congestion has been eliminated (see FIG. 3). In addition, H0 in FIG. 3 represents the detection range by the detection unit 1. Moreover, the white arrow in FIG. 3 represents the passage of time.

  In the driving support device 10 of the present embodiment, the determination unit 4 is configured to determine that the traffic congestion on the road has been resolved when the distance K1 is not detected by the detection unit 1 after determining that the road is in traffic congestion. ing. As a result, the driving support device 10 can more accurately detect in real time that the traffic jam on the road on which the host vehicle 30 travels has been resolved, and more accurately detect the situation of the road on which the host vehicle 30 travels in real time. Can be detected.

  In addition, the first determination unit 8 determines which range of the three preset ranges the distance K1 detected by the detection unit 1 after the second determination unit 9 determines that the road is congested. It is configured to determine whether it belongs. In short, the determination unit 4 is configured to determine to which range of the three preset ranges the distance K1 detected by the detection unit 1 belongs.

  As shown in FIG. 4, the three ranges include a first range H1 from the shortest detection distance A1 by the detection unit 1 to a first distance A2 longer than the shortest detection distance A1, and a first distance A2 to a first distance A2. The second range H2 up to the longer second distance A3 and the third range H3 from the second distance A3 to the longest detection distance A4 by the detector 1 are set. That is, in the driving assistance device 10, the detection range H0 by the detection unit 1 is divided into a first range H1, a second range H2, and a third range H3. The second distance A3 is set shorter than the longest detection distance A4.

  In the present embodiment, the shortest detection distance A1 is set to 45 [cm], for example. In the present embodiment, the first distance A2 is set to 60 [cm], for example. In the present embodiment, the second distance A3 is set to 100 [cm], for example. In the present embodiment, the longest detection distance A4 is set to 150 [cm], for example.

  In the present embodiment, each of the first distance A2 and the second distance A3 is set as a threshold value in the above three ranges, the first distance A2 is included in the first range H1, and the second distance A3 is the second distance. It is set to be included in the range H2. That is, in the present embodiment, the first range H1 is set to a range between the shortest detection distance A1 and the first distance A2. In the present embodiment, the second range H2 is set to a range that is greater than the first distance A2 and less than or equal to the second distance A3. In the present embodiment, the third range H3 is set to a range that is larger than the second distance A3 and not longer than the longest detection distance A4.

  The first determination unit 8 determines that the distance K1 detected by the detection unit 1 after the determination by the second determination unit 9 that the road is congested is from the first range H1 to the second range H2 or the third range. When it comes to belong to range H3, it is constituted so that it may be judged that the traffic jam of the road was eased. In other words, after the determination unit 4 determines that the road is congested, the distance K1 detected by the detection unit 1 comes from the first range H1 to the second range H2 or the third range H3. When it is determined that traffic congestion on the road has been alleviated.

  In the driving support device 10, after the determination unit 4 determines that the road is congested, when the distance K1 detected by the detection unit 1 belongs to the third range H3 from the first range H1, It is determined that road congestion has been alleviated (see FIG. 4). In addition, the white arrow in FIG. 4 represents time passage.

  In the driving support device 10 of the present embodiment, the determination unit 4 is configured to determine to which range the distance K1 detected by the detection unit 1 belongs among three preset ranges. The three ranges are the first range H1 from the shortest detection distance A1 by the detection unit 1 to the first distance A2 that is longer than the shortest detection distance A1, and the first range A2 to the second distance A3 that is longer than the first distance A2. The second range H2 and the third range H3 from the second distance A3 to the longest detection distance A4 by the detection unit 1 are set. When the determination unit 4 determines that the road is congested and the distance K1 detected by the detection unit 1 belongs to the second range H2 or the third range H3 from the first range H1, the road It is configured to determine that the traffic jam has been alleviated. As a result, the driving support device 10 can more accurately detect in real time that traffic congestion on the road on which the host vehicle 30 travels has been reduced, and more accurately detect the situation of the road on which the host vehicle 30 travels in real time. Can be detected.

  In addition, the first determination unit 8 automatically detects when the distance K1 detected by the detection unit 1 belongs to the first range H1 for a predetermined time after the second determination unit 9 determines that the road is congested. It is configured to determine that the host vehicle 30 is stopped due to traffic congestion on the road on which the vehicle 30 travels. In other words, after determining that the road is congested, the determination unit 4 determines that the traffic jam is stopped when the distance K1 detected by the detection unit 1 belongs to the first range H1 for a predetermined time. It is configured. In the present embodiment, the predetermined time is set to, for example, 100 [s], but this numerical value is not particularly limited.

  In the driving support device 10, after the determination unit 4 determines that the road is congested, when the distance K1 detected by the detection unit 1 belongs to the first range H1 for a predetermined time, the congestion is stopped. Judgment is made (see FIG. 5). In addition, the white arrow in FIG. 5 represents time passage.

  In the driving support device 10 of the present embodiment, when the determination unit 4 determines that the road is congested, the traffic jam stops when the distance K1 detected by the detection unit 1 belongs to the first range H1 for a predetermined time. It is comprised so that it may determine that it is in. As a result, the driving support device 10 can more accurately detect in real time that the host vehicle 30 is stopped due to traffic congestion on the road on which the host vehicle 30 travels.

  Further, the determination unit 4 starts traffic congestion on the road on which the host vehicle 30 travels when the road traffic information received by the reception unit 2 is traffic congestion information and the distance K1 is detected by the detection unit 1. It is comprised so that it may be judged.

  In the driving support device 10, the determination unit 4 determines that the traffic jam starts when the road traffic information received by the reception unit 2 is traffic jam information and the distance K1 is detected by the detection unit 1 (see FIG. 6). ). In addition, the white arrow in FIG. 6 represents progress of time.

  In the driving support device 10 of the present embodiment, the determination unit 4 determines that the traffic jam starts when the road traffic information received by the reception unit 2 is traffic jam information and the distance K1 is detected by the detection unit 1. Is configured to do. As a result, the driving support device 10 can more accurately detect in real time that the traffic on the road on which the host vehicle 30 is traveling has started, and the situation on the road on which the host vehicle 30 is traveling can be more accurately detected in real time. Can be detected.

(Embodiment 2)
The driving support device 10 of the present embodiment has the same basic configuration as that of the first embodiment, and includes a control unit 11 that can control the accelerator 23, the brake 24, and the hazard lamp 25 of the host vehicle 30, as shown in FIG. This is different from the first embodiment. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The control unit 11 is configured to control any one of the control objects of the accelerator 23, the brake 24, and the hazard lamp 25. The control unit 11 can be configured, for example, by mounting an appropriate program on the microcomputer. The program is stored in the storage unit provided in advance in the microcomputer. The driving support device 10 is configured to be able to set whether or not to make the control unit 11 control the control target, for example, in accordance with a setting by an operation panel (not shown) of the host vehicle 30. Moreover, the control part 11 is provided with the determination circuit (not shown) which determines whether it is necessary to control the said control object. As the determination circuit, for example, a determination unit provided in advance in the microcomputer can be used. Examples of the determination unit include a comparator.

  The control unit 11 is configured to control the control target based on the determination result by the determination unit 4. Specifically, the control unit 11 is configured to control the accelerator 23 when the determination unit 4 determines that the road is congested. For example, the control unit 11 is configured to reduce acceleration of the host vehicle 30 by the accelerator 23 when the determination unit 4 determines that the road is congested.

  Here, in the present embodiment, the control unit 11 is configured to control the accelerator 23 when the determination unit 4 determines that the road is congested. However, the present invention is not limited to this. For example, in the present embodiment, the control unit 11 may be configured to control the brake 24 when the determination unit 4 determines that the road is congested. In this case, the control unit 11 may be configured to gradually decelerate the host vehicle 30 by the brake 24 when the determination unit 4 determines that the road is congested. In the present embodiment, the control unit 11 may be configured to control the hazard lamp 25 when the determination unit 4 determines that the road is congested. In this case, the control unit 11 may be configured to blink the hazard lamp 25, for example, when the determination unit 4 determines that the road is congested.

  In addition, the control unit 11 is configured to control the accelerator 23 when the determination unit 4 determines that the traffic congestion on the road has been eliminated. For example, the control unit 11 is configured to gradually accelerate the host vehicle 30 by the accelerator 23 when it is determined by the determination unit 4 that the traffic congestion on the road has been eliminated.

  The control unit 11 is configured to control the accelerator 23 when the determination unit 4 determines that the traffic congestion on the road has been alleviated. For example, the control unit 11 is configured to gradually accelerate the host vehicle 30 by the accelerator 23 when the determination unit 4 determines that the traffic congestion on the road has been alleviated.

  The control unit 11 is configured to control the accelerator 23 when the determination unit 4 determines that the traffic jam is stopped. For example, the control unit 11 is configured to prohibit acceleration of the host vehicle 30 by the accelerator 23 when the determination unit 4 determines that the traffic jam is stopped.

  Further, the control unit 11 is configured to control the accelerator 23 when the determination unit 4 determines that the traffic jam starts. For example, the control unit 11 is configured to reduce acceleration of the host vehicle 30 by the accelerator 23 when the determination unit 4 determines that the traffic jam starts.

  Here, in the present embodiment, the control unit 11 is configured to control the accelerator 23 when it is determined by the determination unit 4 that the traffic jam starts. However, the present invention is not limited to this. For example, in the present embodiment, the control unit 11 may be configured to control the brake 24 when the determination unit 4 determines that the traffic jam starts. In this case, the control unit 11 may be configured to gradually decelerate the host vehicle 30 by the brake 24 when the determination unit 4 determines that the traffic jam has started. In the present embodiment, the control unit 11 may be configured to control the hazard lamp 25 when the determination unit 4 determines that the traffic jam starts. In this case, the control unit 11 may be configured to blink the hazard lamp 25, for example, when the determination unit 4 determines that the traffic jam starts.

  In the driving support device 10 of the present embodiment, the control unit 11 controls any one of the control targets of the accelerator 23, the brake 24, and the hazard lamp 25 of the host vehicle 30 based on the determination result by the determination unit 4. However, the present invention is not limited to this. For example, in the driving assistance device 10, the control unit 11 is configured to control a plurality of control objects among the accelerator 23, the brake 24, and the hazard lamp 25 of the host vehicle 30 based on the determination result by the determination unit 4. It may be.

  Further, the control unit 11 may be configured to control the acoustic device 26 of the host vehicle 30. Further, the control unit 11 may be configured to control the acoustic device 26 based on the determination result by the determination unit 4. As the acoustic device 26, for example, a speaker, a buzzer, or the like can be used. When the acoustic device 26 is a speaker, the control unit 11 may control the acoustic device 26 so that, for example, the acoustic device 26 emits sound based on the determination result by the determination unit 4. In addition, when the acoustic device 26 is a buzzer, for example, the control unit 11 controls the acoustic device 26 so that the acoustic device 26 sounds a buzzer sound once or a plurality of times based on the determination result by the determination unit 4. Good. Thereby, in the driving assistance apparatus 10, it becomes possible to notify the condition of the road on which the host vehicle 30 travels from the acoustic device 26.

  Hereinafter, an example of operation | movement of the driving assistance device 10 of this embodiment is demonstrated easily based on FIG.

  In the driving assistance device 10, when the driving assistance device 10 is activated (S8 in FIG. 8), the ultrasonic sensor 5 is activated by the detection unit 1 (S9 in FIG. 8), and the ultrasonic sensor 5 is A sound wave is transmitted for the first specified time.

  The determination unit 4 determines whether or not the distance K1 is detected by the detection unit 1 after the ultrasonic wave is transmitted by the ultrasonic sensor 5 (S10 in FIG. 8). In the driving support device 10, when the distance K1 is detected by the detection unit 1, the road traffic information received by the reception unit 2 and the speed information input to the first input unit 3 are input to the determination unit 4 ( S11 in FIG. Moreover, in the driving assistance apparatus 10, when the distance K1 is not detected by the detection unit 1 and the first specified time has elapsed, the ultrasonic sensor 5 is stopped by the detection unit 1 (S16 in FIG. 8).

  The determination unit 4 determines whether the road is congested based on the road traffic information received by the reception unit 2 and the speed information input to the first input unit 3 (S12 in FIG. 8). ). The determination unit 4 determines that the road is congested when the road traffic information received by the reception unit 2 is traffic jam information and the speed information input to the first input unit 3 is equal to or less than a predetermined speed. (S13 in FIG. 8).

  The determination unit 4 determines that the road is not congested when the road traffic information received by the receiving unit 2 is traffic jam information and the speed information input to the first input unit 3 is not less than a predetermined speed. . In the driving support device 10, when the determination unit 4 determines that the road is not congested and the first specified time has elapsed, the detection unit 1 stops the ultrasonic sensor 5 (S16 in FIG. 8).

  Further, in the driving support device 10, after the determination unit 4 determines that the road is congested, it is determined whether or not the control target of the host vehicle 30 needs to be controlled (S14 in FIG. 8). . In the driving assistance device 10, when the control target needs to be controlled, the control unit 11 controls the control target based on the determination result by the determination unit 4 (S15 in FIG. 8). Moreover, in the driving assistance apparatus 10, after the said control object is controlled by the control part 11, the ultrasonic sensor 5 is stopped by the detection part 1 (S16 in FIG. 8). Moreover, in the driving assistance apparatus 10, when it is not necessary to control the said control object, the ultrasonic sensor 5 is stopped by the detection part 1 (S16 in FIG. 8).

  Moreover, in the driving assistance device 10, when the second specified time has elapsed after the ultrasonic sensor 5 is stopped, the ultrasonic sensor 5 is activated again by the detection unit 1 (S9 in FIG. 8).

  The driving support device 10 of the present embodiment described above further includes a first control unit (control unit 11) that controls any one of the control objects of the accelerator 23, the brake 24, and the hazard lamp 25. The first control unit (control unit 11) is configured to control the control target based on the determination result by the determination unit 4. Thereby, in the driving assistance apparatus 10, it becomes possible to assist the driving | operation of the own vehicle 30 according to the condition of the road where the own vehicle 30 drive | works.

  The driving support device 10 further includes a second control unit (control unit 11) that controls the acoustic device 26. The second control unit (control unit 11) is configured to control the acoustic device 26 based on the determination result by the determination unit 4. Thereby, in the driving assistance device 10, it becomes possible to notify the situation of the road on which the host vehicle 30 travels from the acoustic device 26, and the driver of the own vehicle 30 is more accurately notified in real time. It becomes possible.

DESCRIPTION OF SYMBOLS 1 Detection part 2 Reception part 3 Input part 4 Judgment part 10 Driving assistance apparatus 11 Control part (1st control part, 2nd control part)
22 Speedometer 23 Accelerator 24 Brake 25 Hazard lamp 26 Sound device 31 Vehicle ahead A1 Shortest detection distance A2 First distance A3 Second distance A4 Longest detection distance H0 Detection range H1 First range H2 Second range H3 Third range K1 Distance

Claims (7)

The distance is detected by a detection unit that detects a distance from a preceding vehicle within the detection range, a reception unit that receives road traffic information from the outside, an input unit that receives speed information of the host vehicle, and the detection unit. A determination unit that determines whether or not the road is congested based on the road traffic information received by the reception unit and the speed information input to the input unit,
When the road traffic information received by the receiving unit is traffic jam information and the speed information input to the input unit is equal to or lower than a predetermined speed, the determination unit determines that the road is jammed. It is comprised so that it may determine. The driving assistance device characterized by the above-mentioned. The determination unit is configured to determine that the congestion of the road has been resolved when the distance is not detected by the detection unit after determining that the road is congested. The driving support device according to Item 1. The determination unit is configured to determine to which of the three preset ranges the distance detected by the detection unit belongs,
The three ranges include a first range from the shortest detection distance by the detection unit to a first distance longer than the shortest detection distance, and a second range from the first distance to a second distance longer than the first distance. A range and a third range from the second distance to the longest detection distance by the detection unit;
The determination unit, after determining that the road is congested, when the distance detected by the detection unit belongs to the second range or the third range from the first range, The driving support device according to claim 1, wherein the driving support device is configured to determine that traffic congestion on the road has been alleviated. The determination unit is configured to determine that the congestion is stopped when the distance detected by the detection unit belongs to the first range for a predetermined time after determining that the road is congested. The driving support apparatus according to claim 3, wherein the driving support apparatus is provided. The determination unit is configured to determine that a traffic jam starts when the road traffic information received by the reception unit is the traffic jam information and the distance is detected by the detection unit. The driving support apparatus according to claim 1. A first control unit that controls a control target of any one of an accelerator, a brake, and a hazard lamp;
The operation according to any one of claims 1 to 5, wherein the first control unit is configured to control the control target based on a determination result by the determination unit. Support device. A second control unit for controlling the audio device;
The driving according to any one of claims 1 to 6, wherein the second control unit is configured to control the acoustic device based on a determination result by the determination unit. Support device.

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