JP2628279B2 - Automatic electric system cutoff device at the time of vehicle collision - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically interrupting an electric system at the time of a vehicle collision.

[0002]

2. Description of the Related Art High safety is required for vehicles such as automobiles. As one of them, in a high-speed vehicle such as a competition car, a collision accident occurs, the electric circuit short-circuited by the impact overheats, and the fuel leaked into the car is ignited to prevent fire from occurring, Equipped with a switch to cut off the electrical system. However, since the switch generally needs to be manually operated, it is ineffective when the driver is injured and becomes inoperable. Therefore, Japanese Utility Model Application Laid-Open No. Sho 56-357 and Japanese Patent Application Laid-Open No. 58-2248
No. 33 proposes a protection device in which a collision detection sensor is provided in a vehicle and the supply of power from a battery is cut off by a signal from the collision detection sensor.

[0003]

However, in the above-mentioned prior art, since only the collision of the vehicle is detected and the electric circuit is cut off, the electric circuit is not operated even when the vehicle is still running after the collision. It does not work and cannot control the vehicle. As a result, for example, it is difficult to evacuate to a location remote from other burning vehicles or facilities or other vehicles or facilities at risk of burning,
There was a problem that the possibility of being involved in a secondary disaster could not be avoided. The present invention has been made in order to solve the above problems, and aims to automatically cut off the electric system in a safer state at the time of a vehicle collision, for example, An object of the present invention is to provide a safety device of this kind that can prevent a fire from occurring in its own vehicle after evacuating to a place remote from another vehicle or facility that is burning or at risk of burning.

[0004]

In order to achieve the above object, the present invention provides a detector for detecting a collision of a vehicle, a detector for detecting a vehicle speed, and a shutoff provided in a power supply circuit from a battery to each part of the vehicle. A control unit that is electrically connected to the collision detector and the vehicle speed detector, and that activates the shutoff device when a collision detection signal from the collision detector and a vehicle speed zero signal from the vehicle speed detector are detected. Is provided.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show one embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a vehicle body, 2 denotes a battery disposed in an engine compartment, a negative electrode side is connected to a common potential line, and a positive electrode side is It is connected via a power switch 21 and an amplifier 22 to the output of the control unit 6 mounted on the vehicle. The positive electrode side of the battery 2 is connected to the required electric devices 25a, 25b,
25c, for example, connected to lights, wipers, and instruments. A relay coil 2 that operates the power switch 21 to the cutoff side between the output side of the amplifier 22 and the common potential line.
4 are connected. Reference numeral 3 denotes an engine key for turning on the power switch 21.

Reference numeral 4 denotes a collision detector, which is provided outside the vehicle body 1 and detects a collision with another object of the vehicle body 1 and sends out a collision detection signal. The collision detector 4 is optional, such as an acceleration sensor using a piezo element or the like, or an optical sensor combining an optical fiber and a light emitting body. Reference numeral 5 denotes a vehicle speed detector for detecting a moving speed of the vehicle body. Generally, a ring-shaped multipolar magnet is provided on a drive shaft driven by a gear of a transmission unit, and the rotation is taken out as a resistance change of a magnetoresistive element. Although a cableless sensor that converts the signal into a pulse signal is used, in some cases, a photoelectric sensor, that is, a type in which the rotation of the transmission is extracted by a meter cable and converted into a vehicle speed pulse by a photointerrupter may be used. The collision detector 4 and the vehicle speed detector 5 are connected to the input unit of the control unit 6 via the conversion circuit 7 together with the key switch 3 and other sensors for the drive system and the air conditioner (not shown). , An electrical system automatic connection / disconnection determination / calculation unit is configured.

A sequence as shown in FIG. 3 is constructed in the electrical system automatic connection / disconnection determination / calculation unit. That is, when the detection signals from the collision detector 4 and the vehicle speed detector 5 are input, as a first step, the presence or absence of a vehicle collision is determined. If it is determined in this step that a collision has occurred,
Next, as a second step, it is determined whether or not the vehicle speed is zero. If the vehicle speed is not zero, an electric system connection maintaining signal, that is, a control signal for driving the amplifier in this embodiment is transmitted. Then, when it is confirmed that the vehicle speed is zero, a control signal for shutting off the electric system is transmitted.

[0008]

When the engine key 3 is operated, the power switch 21 is turned on by a signal from the control unit 6, and the power from the battery 2 is turned on by the amplifier 22.
A state in which power can be supplied from the battery 2 to the electric devices 25a, 25b, and 25c is established. While the vehicle is running, a speed detection signal is constantly input from the vehicle speed detector 5 to the speedometer and the control unit 6. If a collision occurs with another object, a collision detection signal is input from the collision detector 4 to the control unit 6. Is done. The collision detection signal and the speed signal are processed in the electric system automatic connection / disconnection determination / calculation section of the control unit 6 in the steps of FIG. 3. If a collision occurs but the vehicle speed is not zero and has a speed, The control unit 6 does not output the electric system cutoff signal, and the power switch 21 is kept in the energized state. When it is determined from the vehicle speed detection signal of the vehicle speed detector 5 that the vehicle speed is zero, the control unit 6
, An electric system cutoff signal is output, whereby the driving of the amplifier 22 is stopped, the exciting current to the relay coil 24 is cut off, and the power switch 21 is turned off. As a result, the electric devices 25a, 25b, 2
The power supply to 5c is stopped. Of course, when the vehicle speed is detected by the speed detector 5 at the same time as the collision detection by the collision detector 4, the control unit 6 sends an electric system cutoff signal and the power switch 21 is turned off.

[0009]

According to the present invention described above, when a collision occurs in a vehicle, the power supply from the battery is not immediately cut off, but the vehicle traveling speed is detected and the conditions for both the collision and the vehicle traveling stop are determined. Only when it is confirmed that the power supply from the battery is cut off, the vehicle's electric system can be controlled while the vehicle is still running after the collision. An excellent effect is obtained such that the vehicle can be easily moved from another vehicle or facility at risk of burning to a safe place.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an electric system automatic cutoff device at the time of a vehicle collision according to the present invention.

FIG. 2 is a system diagram of an automatic electrical system interruption device at the time of a vehicle collision according to the present invention.

FIG. 3 is a control sequence diagram of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Battery 4 Collision detector 5 Vehicle speed detector 6 Control unit 21 Power switch

Claims (1)

(57) [Claims] 1. A detector for detecting a collision of a vehicle, a detector for detecting a vehicle speed, a cut-off device provided in a power supply circuit from a battery to each part of the vehicle, and an electrical connection between the collision detector and the vehicle speed detector. And a control unit for operating the shut-off device when a collision detection signal from the collision detector and a vehicle speed zero signal from the vehicle speed detector are detected. Automatic shut-off device.