JPH0581770U - Vehicle radar device - Google Patents

Abstract

(57) [Summary] [Purpose] If the alarm that is being issued suddenly exceeds the safe inter-vehicle distance, it will not end halfway. [Configuration] When the inter-vehicle distance D suddenly becomes equal to or greater than the safe inter-vehicle distance D1 at time t2, all the remaining phrase B occurring at that time is abandoned, and the primary alarm is interrupted at time t3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle radar device which measures a distance to a front object and outputs a predetermined alarm by voice when the distance is shorter than a predetermined alarm distance.

[0002]

[Prior Art]

 Recently, a vehicle radar device has been proposed for the purpose of preventing a rear-end collision accident caused by a dozing driving or a side-looking driving on a highway. FIG. 4 is a diagram showing a situation in which a laser radar 3 as a vehicle radar device of this type is mounted on a truck 1 and an inter-vehicle distance D from a vehicle ahead 2 is measured. In the figure, 3-1 is a laser radar head having a light transmitting section and a light receiving section. The laser light LS sent from the light sending unit is reflected by the reflector 4 mounted on the rear end of the front vehicle 2 and guided to the light receiving unit as reflected laser light LR. In the laser radar 3, the inter-vehicle distance D is calculated from the emission timing of the laser light LS and the light receiving timing of the reflected laser light LR, and the calculated inter-vehicle distance D is provided in the display unit 3-2 (FIG. 5) provided in the driver's seat. Display). The display unit 3-2 is provided with an inter-vehicle distance display section 3-21 on the front surface thereof, and the measured inter-vehicle distance D is digitally displayed on the inter-vehicle distance display section 3-21. When the truck 1 and the forward vehicle 2 approach each other and the inter-vehicle distance D becomes equal to or less than the safe inter-vehicle distance (primary alarm distance), the alarm lamp 3-22 is turned on and the primary alarm is output by voice.

This situation will be described with reference to FIG. The figure (a) shows the situation where the inter-vehicle distance D is narrowing with the passage of time t, the figure (b) is the sound output timing of the primary alarm at this time, and the figure (c) is the alarm lamp. The lighting condition of 3-22 is shown. When the inter-vehicle distance D becomes less than or equal to the primary alarm distance D1 at time t1, the voice output phrase A (“ping-pong”) is first generated as the primary alarm, and subsequently, the voice output phrase B (“Gotchu )) Occurs repeatedly.

[0004]

[Problems to be solved by the device]

 However, according to such a conventional laser radar 3, for example, when the inter-vehicle distance D suddenly becomes equal to or greater than the safe inter-vehicle distance D1 at time t2 shown in FIG. 6, that is, when the front vehicle 2 outputs the sound of the primary alarm. When it suddenly disappears, the phrase B being generated is cut off midway and the primary alarm is immediately interrupted. For this reason, the primary alarm will be terminated before all of the phrase B that is being generated is exhausted, which is halfway and confusing for the driver.

[0005]

[Means for Solving the Problems]

 The present invention has been made in order to solve such a problem, and when the measured distance to the front object is equal to or more than a predetermined safe distance during the sound output of the alarm, all the remaining sound output phrases being generated are generated. I tried to say that.

[0006]

[Action]

 Therefore, according to the present invention, for example, during the generation of the primary alarm as an alarm, if the measured distance to the front object becomes equal to or greater than the safe distance, the voice output phrase being generated is not cut in the middle and all the remaining voice is said. Cut off.

[0007]

【Example】

 Hereinafter, a vehicle radar device according to the present invention will be described in detail.

FIG. 2 is a block diagram showing a main configuration of a control unit of a laser radar which is an embodiment of this vehicle radar device. The control unit 3-3 is the display unit 3-shown above. Built within 2.

The control unit 3-3 includes a CPU 3-31, a ROM 3-32, and a RAM 3-33, various input information is given to the CPU 3-31 via an interface 3-34, and various processing information in the CPU 3-31 Is output via the interface 3-34.

Next, referring to FIG. 1, the processing operation peculiar to this embodiment in the CPU 3-31 will be described based on the flowchart shown in FIG.

The CPU 3-31 measures the inter-vehicle distance D and monitors it according to the program stored in the ROM 3-32, and determines whether it is an alarm generation condition (step 301). When the inter-vehicle distance D becomes equal to or less than the safe inter-vehicle distance D1 at time t1, it is determined that an alarm is generated and the process proceeds to step 302, the alarm lamp 3-22 is turned on, and the primary alarm is output by voice, and the process proceeds to step 301. Return. That is, as the primary alarm, phrase A (“ping-pong”) is first generated, and subsequently phrase B (“go-chuck” is repeatedly generated.

If the inter-vehicle distance D suddenly becomes equal to or greater than the safe inter-vehicle distance D1 at time t2 during the voice output of the primary alarm, it is determined in step 301 that the alarm is not issued. As a result, it is determined that the dangerous state has been removed, and the process proceeds to step 303, where it is determined whether or not the primary alarm is being output by voice. At this time, since the primary alarm is outputting voice, the process proceeds to step 304 according to YES, and the alarm lamp 3-22 is turned off.

Then, after returning to step 303 through step 301, at the time when all of the remaining phrase B occurring at that time has been exhausted (time t3), the process proceeds to step 306 via step 305 and the primary alarm To suspend.

Therefore, according to the present embodiment, even if the inter-vehicle distance D suddenly becomes equal to or greater than the safe inter-vehicle distance D1 at time t2, the phrase B that is being generated is not cut in the middle, and all the remaining words are lost. Therefore, it will not be halfway and will not give the driver any confusion.

In the above-described embodiment, the alarm lamp 3-22 is immediately turned off at the time point t2, but it may be turned off at the time point t3 when all of the phrase B is exhausted.

In the above-described embodiment, the phrase B is described as occurring when the inter-vehicle distance D suddenly becomes equal to or greater than the safe inter-vehicle distance D1, but if the phrase A occurs. All of this phrase A is exhausted and the primary alarm is interrupted.

Further, in the above-described embodiment, the case where the inter-vehicle distance D suddenly becomes equal to or greater than the safe inter-vehicle distance D1 during the voice output of the primary alarm has been described, but 1 is output during the voice output of the secondary alarm. The same operation as in the case of the next alarm is performed.

That is, in the present embodiment, when the inter-vehicle distance D becomes equal to or less than the secondary warning distance shorter than the safe inter-vehicle distance D1 (for example, half of the safe inter-vehicle distance D1), the secondary alarm is sounded. .. In this case, as the secondary alarm, the voice output phrase C ("ping pong") is first generated, and subsequently the voice output phrase D ("kikendes") is repeatedly generated. If the inter-vehicle distance D suddenly becomes equal to or greater than the safe inter-vehicle distance D1 during the sound output of the secondary alarm, the rest of the generated phase will be exhausted in the same manner as in the case of the primary alarm, and the secondary alarm will be output. Suspended.

Further, although the safe inter-vehicle distance is set equal to the primary warning distance D1 in the present embodiment, it may not necessarily be set equal to the primary warning distance D1 and a hysteresis is set to the primary warning distance D1. It may be set as Dase D1 or more.

In addition, in the above-described embodiment, two types of alarms, a primary alarm and a secondary alarm, have been described. However, even if there are many types of tertiary alarms, quaternary alarms ... Of course, the operation peculiar to this embodiment similar to the case of the primary alarm or the secondary alarm can be performed.

[0021]

[Effect of the device]

 As is clear from the above description, according to the present invention, for example, when a primary alarm is issued as an alarm and the measured distance to a front object becomes a safe distance or more, all the remaining voice output phrases are generated. It won't be confusing to the driver, as it will be said to be complete, it will not be halfway.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a situation in which all the remaining phrases being generated are exhausted when the inter-vehicle distance suddenly becomes equal to or greater than the safe inter-vehicle distance during voice output of the primary alarm.

FIG. 2 is a block diagram showing a main configuration of a control unit of a laser radar which is an embodiment of a vehicle radar device according to the present invention.

FIG. 3 is a flowchart showing a processing operation peculiar to the CPU in this control unit.

FIG. 4 is a diagram showing a situation in which a laser radar is mounted on a truck and an inter-vehicle distance to a vehicle ahead is measured.

FIG. 5 is a front view showing a display unit of this laser radar.

FIG. 6 is a diagram illustrating a situation in which a phrase that is being generated is cut midway when the inter-vehicle distance suddenly becomes equal to or greater than the safe inter-vehicle distance during voice output of the primary alarm.

[Explanation of symbols]

 3-2 Display unit 3-21 Inter-vehicle distance display section 3-22 Alarm lamp 3-3 Control section 3-31 CPU 3-32 ROM 3-33 RAM 3-34 Interface D1 Safety inter-vehicle distance (primary alarm distance)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kosho Ishikawa 500 Kitawaki, Shimizu City, Shizuoka Prefecture Koito Manufacturing Co., Ltd. Shizuoka Factory

Claims (1)

[Scope of utility model registration request] 1. A radar device for a vehicle, which measures a distance to a front object and outputs a predetermined alarm by voice when the distance is equal to or less than a predetermined alarm distance. A vehicle radar device comprising: a voice output means for saying all remaining voice output phrases when a predetermined safety distance or more is reached.