JPH11352241A - Moving body detecting and alarming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attract driver's attention by giving an alarm notice, when an opposite moving body is hidden temporarily behind a shield body. SOLUTION: This moving body detecting and alarming device 1 is equipped with a receiving means 4 which receives electromagnetic waves sent by the opposite moving body, a pattern analyzing means 7 which analyzes the variation pattern of the detected intensity of the electromagnetic waves received by the receiving means 4, a pattern storage means 9 which stores the variation pattern when the moving body is hidden behind a shield body, a pattern approximation decision means 8 which compares the variation pattern analyzed by the pattern analyzing means 7 with the variation pattern stored in the pattern storage means 9 for deciding whether or not they are analogous, and an alarming control means 8 which controls an alarming means according to the decision result of the pattern analogy deciding means 8, and the alarming control means 8 drives the alarming means 5, when the pattern approximation decision means 8 decides that the patterns are analogous to give an alarming notice and stops the alarming notice, when the detected intensity of the electromagnetic waves recovers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving object detection and notification device for detecting and notifying a moving object by radio communication.

[0002]

2. Description of the Related Art Conventionally, various methods have been proposed for detecting other vehicles or other moving objects approaching while driving a vehicle. For example, the one described in Japanese Patent Application Laid-Open No. 2-216600 issues a warning by receiving a warning radio wave transmitted from a transmitting device included in another moving body while a receiving device included in the vehicle travels while monitoring. To detect the presence of a moving object.

[0003]

However, a moving object that has been detected up to now may be temporarily hidden by a shield such as another large vehicle or a fence. The moving object appears.

In such a case, the warning radio wave cannot be received when the moving body is hidden by the shield, and the warning is stopped. Therefore, the driver may forget the existence of the moving body and become alert. .

In such a case, when a temporarily hidden moving object reappears, the unconscious moving object appears and an alarm is issued, so that the driver is confused. Whether the warning was issued by the moving body that appeared again,
Alternatively, it is difficult for the driver to immediately determine whether an alarm has been issued because another moving object has newly appeared.

[0006] The present invention has been made in view of such a point,
The object of the present invention is to provide a moving object detection and notification device which can give a warning and alert the driver when the opponent's moving object is temporarily hidden by an obstacle.

[0007]

In order to achieve the above object, the present invention provides a receiving means for receiving an electromagnetic wave transmitted from a counterpart moving body, and a change in detection intensity of the electromagnetic wave received by the receiving means. Pattern analysis means for analyzing a pattern, pattern storage means for storing a change pattern of the detection intensity of the received electromagnetic wave when the moving body transmitting the electromagnetic wave is hidden by a shield, and detection strength of the electromagnetic wave analyzed by the pattern analysis means A pattern approximation determining means for comparing a change pattern of the detected intensity of the electromagnetic wave stored in the pattern storage means with the change pattern of the electromagnetic wave to determine whether or not the pattern is approximated, and a notifying means based on a result of the determination by the pattern approximate determining means. Notification control means for controlling the information processing means, and the notification control means, when the pattern approximation determination means determines that it is approximate, the notification means Detection intensity of the electromagnetic wave is performed vigilance bulletin drive to encourage vigilance was moving object detection notifying unit that controls so as to stop the alert notification to recover.

If the change pattern of the detected intensity of the electromagnetic wave is similar to the change pattern of the detected intensity of the electromagnetic wave when the moving object is hidden by the shield stored in the pattern storage means in advance, it is determined that the moving object is temporarily hidden by the shield. Since the alert is issued, the driver is always alerted to the existence of the moving object hidden by the shield, and is not hesitated by the reappearance of the moving object.

According to a second aspect of the present invention, in the moving body alerting device according to the first aspect, the alerting control means stops the alerting alert when the alerting alert of the alerting means is continued for a predetermined time. I do.

[0010] Even if it is determined that the moving object is temporarily hidden by the shield and the warning is issued, it may not always be temporary and may have deviated to a side road. Since it does not reappear, the warning notification is stopped after a predetermined time has elapsed, and the warning notification is prevented from continuing.

According to a third aspect of the present invention, in the moving object detection and notification device according to the first or second aspect, it is determined whether or not the number of times that the pattern approximation discriminating means determines the approximation occurs frequently in a short predetermined time. A frequency discriminating means for discriminating the frequency, and when the frequency discriminating means determines that the frequency is high, the sensitivity of the receiving means is reduced.

If the number of times that the pattern approximation discriminating means makes the approximation occurs at a high frequency within a predetermined short period of time, a warning message urging caution is frequently repeated, and the awareness of the caution message is impaired. In such a case, the sensitivity of the receiving means is lowered to reduce the number of times that the pattern approximation discriminating means determines that the pattern is approximated.

According to a fourth aspect of the present invention, in the moving object detection and notification device according to the first or second aspect, whether the number of times that the determination unit determines that the vehicle is close to the high frequency is a predetermined number of times or more in a short period of time. A frequency discriminating means for discriminating whether or not the frequency discriminating means has a high frequency, and setting a high threshold value for discriminating the recovery of the detection strength of the electromagnetic wave of the notification control means. I do.

When the frequency discriminating means determines that the frequency is high, the threshold value for discriminating the recovery of the detection strength of the electromagnetic wave of the notification control means is set to be high, so that the warning notification urging the warning is frequently repeated. Can be prevented.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic block diagram of a moving object detection notification device 1 according to the present embodiment. The mobile object detection notification device 1 includes: a communication notification control device 2;
A transmission instruction is given to the transmission circuit 3, a signal received by the reception circuit 4 is input, and output to the notification device 5 based on the result of the signal processing.

The transmitting circuit 3 receives a transmitting instruction from the communication notification control circuit 2 and transmits an electromagnetic wave from the transmitting antenna 3a. The electromagnetic waves captured by the receiving antenna 4a and received by the receiving circuit 4 are analyzed.

That is, the electromagnetic wave received by the receiving circuit 4 is filtered through a filter 6 to remove noise, ripples, peaks, etc., and is input to a discriminating circuit 8 and a differentiating circuit 7, where a change in the detected intensity is extracted. Then, it is input to the determination circuit 8. The discriminating circuit 8 has an input directly from the receiving circuit 4.

The communication notification control device 2 is provided with a pattern memory 9 for preliminarily storing a change pattern of the detected intensity of the received electromagnetic wave when the moving body transmitting the electromagnetic wave is hidden by a shield. The change pattern of the detected intensity of the electromagnetic wave is input to the determination circuit 8.

FIG. 2 shows a change pattern of the detected intensity of the electromagnetic wave stored in the pattern memory 9. The area where the detection intensity has dropped is the blocking area where the moving object is hidden by a blocking object. FIG. 2 (a) illustrates a case where the other party is temporarily blocked while moving away, and FIG. 2 (b) illustrates a case where the other party is temporarily blocked while approaching. I do. FIG. 2C illustrates a case where the other party's moving body has deviated to a side road.

The discriminating circuit 8 discriminates whether or not the change in the detected intensity extracted by the differentiating circuit 7 of the electromagnetic wave received by the receiving circuit 4 is approximated by comparing it with the change pattern shown in FIG.

When the discriminating circuit 8 determines that the moving objects are close to each other, the discriminating circuit 8 judges that the moving object is temporarily hidden by the shielding object and outputs a warning notification instruction to the notifying device 5. The notification device 5 emits an alarm sound and displays a screen.

That is, when a warning notification instruction is issued from the discriminating circuit 8, a voice message is displayed indicating that "detection is currently not possible and attention is required" and information to that effect is displayed on the screen. In addition, a warning sound may be emitted by a buzzer or a blinking display of a display lamp may be used.

As described above, when it is determined that the moving object is temporarily hidden by the shield, an alert is issued, so that the driver is always made aware of the existence of the moving object hidden by the shield and is prompted to be alert. Therefore, even if the moving object suddenly reappears, it is possible to avoid a situation in which the moving object faces each other without being alert and does not get confused.

When the moving object reappears and is released from the cut-off area, the detection strength is recovered, and the discriminating circuit 8 discriminates this and instructs the notifying device 5 to stop the above-mentioned alert notification,
The fact that the terminal has been released is announced by voice. If the vehicle is not released from the blocking area even after the lapse of the predetermined time, the moving body may have deviated to a side road and left far away,
In this case, the alerting is also stopped.

The communication notification control device 2 has a frequency discriminating circuit.
The frequency discriminating circuit 10 counts the number of times that the discriminating circuit 8 determines that the frequency is approximate, and determines whether or not the frequency is high enough to make the determination more than a predetermined number of times within a predetermined time. I do. When the frequency determining circuit 10 determines that the frequency is high, the receiving sensitivity of the receiving circuit 4 is lowered.

When the frequency discriminating circuit 10 determines that the frequency is high, the warning notification urging the user to be vigilant is frequently repeated, which is bothersome and rather impairs the awareness of the warning notification. In this case, the sensitivity of the receiving circuit 4 is reduced to reduce the number of times that the discriminating circuit 8 makes the approximation when the approximation is performed, so that it is possible to prevent the alert notification urging the alert from being repeated frequently.

The frequency discriminating circuit 10 controls the sensitivity of the receiving circuit 4, but acts on the discriminating circuit 8 to discriminate the recovery of the detected intensity when the moving object reappears and is released from the cut-off area. May be set higher. By increasing the threshold value, it is possible to prevent the alert notification urging the alert from being repeated frequently.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a moving object detection notification device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a change pattern of a detection intensity.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Moving body detection alerting device, 2 ... Communication alert control device, 3 ...
Transmission circuit, 4 reception circuit, 5 notification device, 6 filter, 7 differentiation circuit, 8 discrimination circuit, 9 pattern memory, 10 frequency discrimination circuit.

Claims (4)

[Claims] 1. A receiving means for receiving an electromagnetic wave transmitted by a counterpart moving body, a pattern analyzing means for analyzing a change pattern of a detection intensity of the electromagnetic wave received by the receiving means, and a moving body for transmitting the electromagnetic wave is a shield. Pattern storage means for storing a change pattern of the detected intensity of the received electromagnetic wave when hiding, a change pattern of the detected strength of the electromagnetic wave analyzed by the pattern analysis means and a change pattern of the detected intensity of the electromagnetic wave stored by the pattern storage means Pattern approximation determining means for comparing and determining whether or not the pattern approximation is performed; and notification control means for controlling notification means based on a result of the determination by the pattern approximation determination means. When it is determined that the determination means is approximated, when the detection strength of the electromagnetic wave is restored by performing the warning notification to drive the notification means to prompt a warning when the determination means is approximated Moving object detection apparatus for alerting and controls so as to stop the 戒報 knowledge. 2. The moving body notification device according to claim 1, wherein the notification control means stops the warning notification when the warning notification of the notification means is continued for a predetermined time. 3. A method according to claim 1, further comprising a frequency discriminating means for discriminating whether or not the number of times that the pattern approximation discriminating means determines the approximation occurs at a high frequency in a short predetermined time. 3. The moving body detection notification device according to claim 1, wherein the sensitivity of the receiving means is reduced. 4. A frequency discriminating means for discriminating whether or not the number of times that the discriminating means determines that the frequency is close is a predetermined number of times or more in a short predetermined time, and the frequency discriminating means determines that the frequency is high. 3. The mobile object detection notification device according to claim 1, wherein a threshold value for determining the recovery of the detection strength of the electromagnetic wave of the notification control means is set to be high.