JPH0671333U - Vehicle collision warning device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent a rear-end collision accident by detecting the fact that the inter-vehicle distance is less than the safe inter-vehicle distance and giving a warning that the driver can directly experience. [Structure] The driver seat 1 provided in the driver's cab is
A seat belt 4 having one end fixed by a main belt bracket 2 is equipped and restrains a driver (not shown). When the rear-end collision warning unit 31 detects that the vehicle-to-vehicle distance between the own vehicle and the vehicle in front is less than the safety vehicle-to-vehicle distance, the belt fastening force varying device that varies the fastening force of the seatbelt 4.
11 operates to tighten or loosen the fastening force of the seat belt 4 to intermittently change the restraining force on the driver.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rear-end collision warning system for a vehicle, which detects a possibility of a rear-end collision of a vehicle based on an inter-vehicle distance and issues a warning to alert a driver to prevent an accident.

[0002]

[Prior art]

 In recent years, for example, while using a laser radar device to measure the inter-vehicle distance to the vehicle in front, the safe inter-vehicle distance is calculated based on the own vehicle speed obtained from the vehicle speed signal from the vehicle speed sensor. There is known a rear-end collision alarm device that issues an alarm to warn or warn the driver when the vehicle distance is shorter than the safe inter-vehicle distance to prevent a rear-end collision accident of the vehicle (for example, Japanese Utility Model Publication No. 2-7153 and Japanese Utility Model Publication No. 7154, etc.).

[0003] Examples of the alarm include an alarm buzzer and an alarm lamp as disclosed in Japanese Utility Model Laid-Open No. 2-17429.

[0004]

[Problems to be solved by the device]

 However, in these devices, when it is detected that there is a risk of a rear-end collision with the vehicle, the device is configured to display an alarm lamp or the like on the operation panel or sound an alarm. There is a fear that the driver may overlook or overlook, failing to properly call the driver's attention, and failing to achieve the original purpose.

The present invention has been made in view of the above circumstances, and when it detects that a vehicle is likely to collide with another vehicle, it issues an alarm that the driver can directly experience, and An object of the present invention is to provide a vehicle rear-end collision warning device capable of preventing a collision accident in advance.

[0006]

[Means for Solving the Problems]

 For this reason, the present invention provides a rear-end collision warning generating means for generating a rear-end collision warning when the inter-vehicle distance to the vehicle ahead is less than the safe inter-vehicle distance calculated based on the vehicle speed, and a belt for varying the fastening force of the seat belt. In a vehicle provided with a fastening force varying device, when the rear-end collision warning means detects that the inter-vehicle distance is less than the safe inter-vehicle distance, the belt fastening force varying device intermittently releases the fastening force of the seat belt. The configuration is variable.

[0007]

[Action]

 In this structure, when the rear-end collision warning generating means detects that the inter-vehicle distance is less than the safe inter-vehicle distance, the belt fastening force varying device intermittently varies the fastening force of the seat belt. The driver restrains the driver by changing the strength of the seat belt intermittently. As a result, the driver will experience an intermittently changing restraint force as an alarm, which will more certainly alert the driver and prevent a rear-end collision of the vehicle.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a driver seat 1 provided in a driver's cab is equipped with a seat belt 4 whose one end is fixed to an anchor plate 3 by a main belt bracket 2, and the seat belt 4 includes a bracket 5 on a ferrule 6. By being inserted, the driver (not shown) is restrained.

Here, the other end of the seat belt 4 is drawn into the side wall 7 of the body, and a belt fastening force varying device 11 for varying the fastening force of the seat belt 4 is incorporated in the side wall 7 of the body. ing. The belt fastening force varying device 11 controls the rotation of the shaft 13 by a drive signal of the control unit 15, for example, by a motor or the like, and changes the rotational torque of the shaft 13 to change the fastening force of the seat belt 4. The restraint force on the driver can be changed intermittently as shown in Fig. 2 by tightening or loosening.

Further, the control unit 15 is connected to the rear-end collision warning unit 31. As shown in FIG. 3, the rear-end collision warning unit 31 includes a laser / radar head 32 for measuring the distance to a vehicle ahead, a setting switch 33 for selecting an alarm generation distance, and a speed sensor for detecting the own vehicle speed. 36, an arithmetic unit 34 for processing various kinds of information, and an output unit 35 for displaying the inter-vehicle distance calculated by the arithmetic unit 34 and outputting an alarm signal.

The operation of the rear-end collision warning unit 31 will be briefly described with reference to FIG. The laser beam 42 is emitted forward from the laser emitting portion of the laser radar head 32 provided on the front surface of the own vehicle 41. The laser beam 42 emitted when the vehicle 43 is in front is reflected by the reflector at the rear of the vehicle 43, and the reflected light 44 is received by the light receiving portion of the laser radar head 32. Then, from the time until the reflected light 44 is received, the inter-vehicle distance D is calculated by the arithmetic unit 34 incorporating the microcomputer. The calculated inter-vehicle distance is displayed on the output device 35. When the inter-vehicle distance D between the own vehicle 41 and the preceding vehicle 43 becomes less than the safe inter-vehicle distance, the output device 35 outputs a rear-end collision detection signal to the control unit 15.

That is, the rear-end collision alarm unit 31 has the function of rear-end collision alarm generation means. FIG. 5 is a block diagram of the control unit 15. The rear impact warning unit 31 is connected to the drive signal output unit 17 via the rear impact signal input unit 16, and the belt signal force varying unit from the drive signal output unit 17 is connected. The drive signal is output to 11. Next, the operation will be described.

In such a configuration, when the inter-vehicle distance D between the own vehicle 41 and the front vehicle 43 becomes less than the safe inter-vehicle distance, the rear-collision warning unit 31 determines that there is a possibility that the own-vehicle may collide with the belt fastening force changing device 11. The tightening force of the seat belt 4 is tightened or loosened to intermittently change the restraining force on the driver as shown in Fig. 2. Therefore, the driver intermittently changes the strength by the seat belt 4. It is changed to and is restrained.

As a result, the driver feels the restraint force of the seat belt 4 which changes intermittently as an alarm, and thus the driver is more surely alerted to prevent a car collision accident. be able to.

[0015]

[Effect of device]

 Since the present invention is configured as described above, the belt fastening force varying device intermittently varies the fastening force of the seat belt when it is detected that the inter-vehicle distance becomes less than the safety inter-vehicle distance. As a result, the danger of a rear-end collision is generated as an alarm that allows the driver to directly experience it, which has the effect of preventing a rear-end collision of the vehicle.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a time chart according to the belt fastening force varying device of the above embodiment.

FIG. 3 is a configuration diagram of a rear-end collision warning unit according to the embodiment.

FIG. 4 is an explanatory diagram of the operation of the rear impact warning unit of the above.

5 is a block diagram of the control device of FIG.

[Explanation of symbols]

 1 Driver seat 4 Seat belt 11 Belt fastening force variable device 15 Control unit 31 Rear impact warning unit 32 Laser radar head 34 Computing device 35 Output device

Claims (1)

[Scope of utility model registration request] 1. A rear-end collision warning generating means for generating a rear-end collision warning when the inter-vehicle distance to a vehicle ahead becomes less than a safety inter-vehicle distance calculated based on the vehicle speed, and a belt fastening force variable for varying a seat belt fastening force. In a vehicle equipped with the device,
When the rear-end collision alarm generation means detects that the inter-vehicle distance becomes less than the safe inter-vehicle distance, the belt fastening force varying device intermittently varies the fastening force of the seat belt. Alarm device.