JP3736003B2 - Vehicle alarm device - Google Patents

Description

BACKGROUND OF THE INVENTION
The present invention relates to a vehicular alarm device, and more particularly to a device that issues an alarm when the danger level of a vehicle running state is high.
[0001]
[Prior art]
An example of a conventional vehicle alarm device will be described with reference to FIG.
In this example, the driver A is driving the vehicle C1, and the driver B is resting on the bed 7 provided behind the driver A. In the vehicle C1, the presence of the forward vehicle C2 is confirmed and the inter-vehicle distance is measured by receiving the reflected light of the electromagnetic wave emitted from the transducer 1 such as a radar toward the forward vehicle C2. .
[0002]
Then, along with this inter-vehicle distance, the signal processing unit 2, which is a computing device such as a microcomputer, detects the own vehicle speed detected by the own vehicle speed detection unit 3 provided to detect the rotation of the output shaft of the transmission (not shown). The vehicle speed signal is subjected to signal processing (for example, A / D conversion) and given to the determination unit 4. The determination unit 4 obtains the danger level of the current vehicle running state from these input signals, and gives an alarm corresponding to the danger level to the driver A by the warning unit 5.
[0003]
However, in such a conventional example, when the warning is performed by means of hearing such as sound, there is a problem that the rest of the driver B is hindered.
[0004]
In order to solve such problems, there has been proposed a vehicular alarm device that provides alarms in two stages as disclosed in Japanese Patent Laid-Open No. 5-69785.
[0005]
That is, a warning is given to the driver only through tactile means at a low risk level, and a second warning is given to all drivers and passengers by auditory means at a high risk level. Device.
[0006]
As shown in FIG. 5, the degree of danger in this case is composed of a primary alarm range (attention alarm range) and a secondary alarm range (danger alarm range), and is determined from the relative speed with the preceding vehicle and the inter-vehicle distance. . The risk increases as the relative speed with the preceding vehicle increases and as the inter-vehicle distance decreases.
[0007]
The first alarm is issued in the primary alarm range where the degree of danger is low. The condition is that the inter-vehicle distance to the preceding vehicle C2 is larger than the emergency inter-vehicle distance and smaller than the warning inter-vehicle distance. On the other hand, the second warning is given in the secondary warning range where the degree of danger is high, and the condition is that the inter-vehicle distance from the preceding vehicle C2 is smaller than the emergency inter-vehicle distance.
[0008]
Here, the emergency inter-vehicle distance is a limit inter-vehicle distance that can prevent a rear-end collision with the front vehicle by the sudden braking operation of the vehicle C1 when it is assumed that the host vehicle C1 and the front vehicle C2 traveled as they are. The inter-vehicle distance is a limit inter-vehicle distance that can prevent a rear-end collision by a sudden braking operation from the time point of the vehicle C1 when it is assumed that the forward vehicle C2 is decelerated from now on.
[0009]
FIG. 6 shows a specific on-vehicle structure example for giving the above-described two-stage alarm. The risk is determined by the alarm switching determination unit 8 disposed under the seat where the driver A is sitting, and when the risk is in the low primary alarm range, the first alarm is embedded in the headrest of the driver seat. The second alarm is given to the driver A and the passenger (also a driver) B from the speaker 10 when the loudspeaker 9 is given only to the driver A through the loudspeaker 9 and the risk level is in the secondary warning range.
[0010]
[Problems to be solved by the invention]
However, when the vehicle alarm device as described above is used, the passenger may not be able to avoid the danger because the alarm is not given until the passenger enters the secondary alarm range with a high degree of danger. For example, the driver is in a state where he / she cannot grasp his / her driving state such as a snooze driving and the passenger is also taking a break.
[0011]
In such a case, in the initial stage, the vehicle fluctuates, and a small change is seen in the relative speed with respect to the preceding vehicle and the inter-vehicle distance. At this time, the first warning is frequently given to the driver because it enters and leaves the primary warning range with a low degree of danger many times. And even if the passenger is aware of the danger by entering the second alarm range with a high degree of danger and giving the second alarm, there is a possibility that the danger can not be avoided and the accident can be caused because the corresponding time is short Become very expensive.
[0012]
Accordingly, the present invention provides a vehicle warning device that generates a first or second warning depending on whether the vehicle running state is a primary warning range or a secondary warning range. The purpose is to improve reliability by determining that the degree of danger is high and giving a warning to passengers.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, a vehicle alarm device according to the present invention includes a detection unit that detects a traveling state of a vehicle, a first alarm unit that gives a first alarm in a primary alarm range only to a driver, A second alarm unit that gives a second alarm in the secondary alarm range to the driver and passengers, and the first and first alarms by determining whether the driving state is the primary alarm range or the secondary alarm range, respectively. A second alarm unit, and a determination unit that simulates the secondary alarm range when the number of alarms per unit time exceeds a threshold even in the primary alarm range.
[0014]
That is, in the present invention, when the traveling state of the vehicle is detected, the determination unit determines whether the traveling state is a primary alarm range or a secondary alarm range. The first alarm is given only to the driver by energizing the vehicle, and in the case of the secondary alarm range, the second alarm unit is activated and the second alarm is issued to both the driver and the passenger. give.
[0015]
And even if it is the primary alarm range, when the number of alarms per unit time exceeds the threshold, the secondary alarm range is assumed, and the second alarm unit is energized to both the driver and the passenger. Give a second alarm.
[0016]
In this way, when the driving state gradually increases in danger level, it is possible to give a warning to the passengers to promote safe driving, or to take breaks or change driving.
[0017]
In the above case, a detection unit that detects whether or not the passenger is resting at a predetermined place of the vehicle is provided, and when the detection unit detects that the passenger is not resting, the determination unit even primary warning area to constructive and the secondary warning area.
[0018]
Further, the distance between vehicles or the steering angle can be used as the running state of the vehicle.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a vehicle alarm device according to the present invention will be described below with reference to the drawings.
FIG. 1 shows a control system diagram of a vehicular alarm device according to the present invention. In particular, this functions as a vehicle front obstacle alarm device.
[0020]
That is, 1 is a transducer such as a radar (laser) that measures the distance between the vehicle and an obstacle, 2 is a signal processing unit that is an arithmetic device such as a microcomputer that performs A / D conversion of the input signal, As shown in 4, the own vehicle speed detecting unit 4 detects the own vehicle speed, and 4 indicates the vehicle running state based on the received signal (inter-vehicle distance signal) and the own vehicle speed signal from the transducer 1 processed in the signal processing unit 2. The determination units 51 and 52 for determining what alarm should be generated by inputting as a signal indicating the first and second alarms driven by the determination unit 4 to generate the first and second alarms in the primary and secondary alarm ranges, respectively. A second alarm unit and 6 are a resting state detecting unit for detecting the resting state of the passenger.
[0021]
FIG. 2 schematically shows a structural diagram of an embodiment when the first and second alarm portions 51 and 52 in the control system of FIG. 1 are mounted on a vehicle. In this embodiment, the first alarm A vibration generating part 51a that vibrates the steering wheel ST is used as a part, a speaker 52a provided in front of the driver A as a second alarm part, and a pillow part of the bed 7 where the passenger B is resting The provided speaker 52b and vibration generator 52c are used. Further, the bed 7 is provided with a bed sensor as the rest state detection unit 6.
[0022]
Similarly to the conventional example of FIG. 6, a speaker 51 b embedded in the headrest of the seat of the driver A may be used as the first alarm unit 51, and the second alarm unit 52 may be used in front of the driver A. Only the provided speaker 52a may be used.
[0023]
Next, the determination procedure of the determination unit 4 will be described with reference to the flowchart shown in FIG.
First, when the signal processing unit 2 receives the output signal of the transducer 1 and the output signal of the own vehicle speed detection unit 3, performs predetermined signal processing and sends the signal to the determination unit 4, the determination unit 4 has a low risk level. It is determined whether or not. This is determined based on whether the vehicle is within the primary alarm range shown in FIG. 5 based on the inter-vehicle distance measured by the transducer 1 and the own vehicle speed measured by the own vehicle speed detection unit 3 (step S1).
[0024]
If it is determined that this is not the primary alarm range, it is subsequently determined whether or not the secondary alarm range indicates a high risk state (step S2). As a result, when it is found out that it is in the secondary alarm range, a secondary alarm is output to the driver A and the driver B (step S3).
[0025]
In this embodiment, as shown in FIG. 2, the speakers 52a and 52b as the first and second alarm units and the vibration generating unit 52c are driven by the determination unit 4, and the driver A and the passenger are both voiced and vibrated. An alarm is given to B.
[0026]
On the other hand, when it is determined in step S1 that the vehicle is in the primary alarm range (when the degree of danger is low), it is further determined from the output signal of the bed sensor 6 whether the passenger B other than the driver A is resting. (Step S4).
[0027]
As a result, when it is found that the passenger B is not taking a break, the process proceeds to step S3, and a secondary warning is given to the driver A and the driver B in the same manner as described above. This is because passenger B is not taking a break, so there is no problem even if a secondary alarm is given by sound.
[0028]
On the other hand, when it is found that the passenger B is resting on the bed 7 as shown in FIG. 2, the determination unit 4 determines the number of alarms per unit time, and whether the number of alarms exceeds the threshold value. Is determined (step S5). In this embodiment, it is determined whether or not the number of alarms is 20 or more in 30 minutes.
[0029]
When the number of alarms is 20 or more, since it is determined that the degree of danger is high even in the primary alarm range, a secondary alarm is given to both driver A and driver B (step S3). .
[0030]
On the other hand, when the number of alarms is 20 or less, since it is determined that the degree of risk is low, only the driver A is given a primary alarm (step S6). In the present embodiment, as shown in FIG. 2, only the driver A is given a warning by using the steering vibration by the vibration generating unit 51a.
[0031]
In addition to the above-described embodiments, in the present invention, the first alarm unit may use a portable wireless vibrator or light if it is not transmitted to anyone other than the driver. In addition to providing a bed sensor in the rear seat as in the present invention, the passenger's rest state detection unit may be provided with a seat sensor on the passenger side and an automatic switching unit to detect the presence of the passenger. Alternatively, a changeover switch may be provided to perform the operation manually.
[0032]
In addition, a secondary alarm may be generated according to the number of alarms per unit time of the primary alarm without providing a passenger break state detection unit (without performing the determination in step S4).
[0033]
Further, as described above, in addition to the inter-vehicle distance as described above, the output signal may be used for determining the primary / secondary alarm range by using the steering angle sensor.
[0034]
【The invention's effect】
According to the alarm device according to the present invention described above, the accident takes place warning as early Ri good can be prevented.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a control system of a vehicle alarm device according to the present invention.
FIG. 2 is a diagram schematically illustrating a vehicle mounting state of an alarm unit used in the vehicle alarm device according to the present invention.
FIG. 3 is a flowchart showing a processing algorithm of a determination unit in the vehicle alarm device according to the present invention.
FIG. 4 is a side view schematically showing a vehicle mounting state of a conventionally known vehicle alarm device.
FIG. 5 is a graph showing a warning range for a running state of a vehicle known in the related art.
FIG. 6 is a diagram schematically showing a vehicle mounting state of an alarm unit used in a conventional vehicle alarm device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Transmitter / receiver 2 Signal processing part 3 Signal processing part 4 Determination part 51 1st alarm part (vibration generation part)
52 2nd alarm part 52a, 52b Speaker 52c Vibration generation part 6 Passenger's rest state detection part (bed sensor)
7 In the bed diagram, the same symbols indicate the same or corresponding parts.

Claims (2)

A detection unit for detecting a running state of the vehicle;
A first alarm unit that only gives the driver a first alarm in the primary alarm range;
A second alarm unit for giving a second alarm in the secondary alarm range to the driver and passengers;
By determining whether the traveling state is the primary alarm range or the secondary alarm range, the first alarm unit and the second alarm unit are energized. A determination unit that simulates the secondary alarm range when the threshold is exceeded;
A detection unit for detecting whether or not the passenger is resting at a predetermined location of the vehicle,
When該検known unit that the passenger is not in break is detected, the determination unit, a vehicle alarm system which is characterized in that even the primary warning area to constructive and the secondary warning area. Oite to claim 1,
An alarm device for a vehicle, wherein the traveling state is an inter-vehicle distance or a steering angle.

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