JPS60152968A - Obstacle monitor for vehicle - Google Patents

Abstract

PURPOSE:To secure an operation control according to purposes of using a plurality of ultrasonic sensors by having the operation control thereof interlocking the vehicle speed. CONSTITUTION:A vehicle speed detecting section is, for example, a circuit which calculates the vehicle speed in terms of the revolution of tires of a vehicle and is provided with a control circuit adapted to control operations of forward/backward monitor sensors A1-A4, vehicle-to-vehicle distance monitor sensors B1 and B2 and side monitor sensors C1 and C2 by an output thereof. For example, during the forward running at a low speed, the sensors A1 and A2 operate while the sensors A3 and A4 do during the retraction at a low speed. During the high speed running, the sensors B1 and B2 operate and give an alarm to a driver to obtain a safe distance between vehicles. During the time, the sensors C1 and C2 operate to detect the distance between vehicles on the side. Thus, the operations of the separate ultrasonic sensors are controlled automatically to ensure a safe driving.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a vehicle obstacle monitoring device that monitors obstacles around a vehicle or distance between vehicles using an ultrasonic sensor installed in the vehicle.

(Background technology) Ultrasonic sensors installed in vehicles transmit ultrasonic waves,
It monitors obstacles around the vehicle or the distance between vehicles by detecting reflected signals from objects.

Figure 1 shows an example of an ultrasonic sensor installed in a vehicle. In FIG. 1, A1. A2, A3, and A4 are longitudinal direction monitoring sensors consisting of short-range detection type ultrasonic sensors that monitor the front and rear surroundings, respectively;
, B2 detect the front and rear inter-vehicle distances, respectively.
This is a distance monitoring sensor consisting of a long-distance detection type ultrasonic sensor, and CI and C2 are lateral monitoring sensors consisting of a short-distance detection type ultrasonic sensor that monitors side obstacles, such as the lateral distance between vehicles when driving. It's a sensor.

These ultrasonic sensors A, B, and C do not need to operate during lightning. For example, the longitudinal direction monitoring sensor A that monitors the front and rear surroundings is necessary when the vehicle is running at low speeds, but its function is not required when the vehicle is running at high speeds. In addition, the following distance monitoring sensor B, which detects the distance between the front and rear vehicles, is required only when driving at high speeds, and when driving at low speeds,
For example, if the system were to operate while driving around town or stopping at a traffic light, it would constantly issue unnecessary warnings, which would be a problem. Further, the same can be said about the side monitoring sensor C as well as the following distance monitoring sensor B.

In this way, each ultrasonic sensor A, B, C is
It is necessary to operate in a state corresponding to each purpose of use. Therefore, if you try to manually control the operation of each sensor, each sensor A,
On/off operation of operation switches B and C, and each sensor A.

The driver's attention is taken up by checking the operating states of B and C, which may even create concerns about safe driving.

(Object of the Invention) The present invention has been made in view of the above points, and its purpose is to be able to control the operation of multiple types of ultrasonic sensors for different purposes of use, and to To provide a vehicle obstacle monitoring device that does not hinder safe driving.

(Disclosure of the Invention) The present invention provides an obstacle monitoring device for a vehicle equipped with a plurality of types of ultrasonic sensors having different monitoring functions during high-speed driving and low-speed driving, in which operation control of the plurality of types of ultrasonic sensors is provided. It is characterized by being linked to the vehicle speed.

Hereinafter, the present invention will be explained based on examples. FIG. 2 shows an example of a circuit configuration according to the present invention, which controls the operation of each ultrasonic sensor according to the traveling speed of the vehicle. In FIG. 2, the vehicle speed detection unit 1 is a circuit that has a function of calculating the vehicle speed based on, for example, the number of rotations of the tires of the vehicle. A control circuit 2 is provided to control the operation of each of the side monitoring sensor B and the side monitoring sensor C.

Next, the operation of the vehicle obstacle monitoring device according to the present invention will be described in a third manner.
This will be explained with reference to figures fa) to tel. For example, when driving forward at a low speed, the forward direction monitoring sensors AI and A2 operate as shown in fa) in the same figure, and when driving backward at a low speed, as shown in the same figure (bl), the rear direction monitoring sensors A3 and A2 operate.
4 works. Also, when driving at high speed, the same figure (C1
As shown in , the inter-vehicle distance monitoring sensors Bl and B2 operate and issue a warning to the driver so that a safe inter-vehicle distance can be maintained. Furthermore, at this time, the side monitoring sensors CI and C2 also operate to detect the distance between vehicles on the side.

In this way, the present invention automatically operates multiple types of ultrasonic monitoring sensors, each having a different monitoring function, according to the purpose of use, depending on the traveling speed of the vehicle,
It also automatically stops.

(Effects of the Invention) As described above, the present invention provides a vehicle obstacle monitoring device equipped with a plurality of types of ultrasonic sensors that have different monitoring functions during high-speed driving and low-speed driving. By linking the sensor operation control to the vehicle speed, the following effects are achieved.

■The operation of each ultrasonic sensor can be automatically controlled, so there is no problem with safe driving.

■Operations can be reliably controlled according to the purpose of use of each ultrasonic sensor.

■Unnecessary alarms (for example, alarms caused by inter-vehicle distance monitoring sensors when the vehicle is stopped) are not generated.

[Brief explanation of the drawing]

Fig. 1 is a simplified diagram showing an example of the arrangement of an ultrasonic sensor in a vehicle, Fig. 2 is a block diagram showing an example of a circuit configuration according to the present invention, and Fig. 3 explains the operation of the ultrasonic sensor according to the present invention. It is a simplified diagram. A... Front/rear direction monitoring sensor B... Intervehicle distance monitoring sensor C... Side monitoring sensor Patent applicant Matsushita Electric Works Co., Ltd. Agent Patent attorney Toshimaru Takemoto (and 2 others) Figure 1 Figure 2 figure

Claims (1)

[Claims] (1) In a vehicle obstacle monitoring device equipped with multiple types of ultrasonic sensors that have different monitoring functions when driving at high speeds and when driving at low speeds, the operation control of the multiple types of ultrasonic sensors is linked to the vehicle speed. A vehicle obstacle monitoring device characterized by: