JPH0233183Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a sensing device for automatically checking and recording the driving conditions of a driver of a truck or similar motor vehicle.

[Conventional technology]

BACKGROUND OF THE INVENTION Drivers of trucks and other similar vehicles often drive recklessly, such as by starting suddenly, stopping suddenly, or making sharp turns, resulting in accidents. There are sensing devices that automatically check and record such operating conditions, but the sensitivity of the inertial member is adjusted by adjusting the elasticity of the spring, so the elasticity of the spring changes with long-term use. However, it had the disadvantage that it could not be adjusted accurately.

[The problem that the idea aims to solve]

The goal of this invention is to further improve such a device so that the sensing element that detects the driving situation only operates when the actual driving situation is true, so that accurate driving conditions can be grasped, and this can be done. The object of the present invention is to provide a device that improves driver's safe driving and prevents accidents.

[Means to solve the problem]

The means of the present invention includes a coil that is wound around the outer peripheral surface of a case containing a magnetic fluid and has a volume meter interposed therein, and a coil that is supported in the case so as to be able to swing freely in the case, and that is placed inside the magnetic fluid contained in the case. It consists of a magnetic pendulum immersed in water, a magnet fixed to the top end of the pendulum, and multiple reed switches placed around the magnet.The reed switches are electrically connected to the above coil via an alarm. It's what I did.

〔Example〕

In the figure, 1 is a case, around which a coil 2 is wound, the coil 2 is connected to a power source via a lead wire 3, and a volume meter VR is interposed. Furthermore, a lead wire 4 with an alarm interposed therebetween is connected to the lead wire 3.

A case 1 is filled with a magnetic fluid 6. The magnetic fluid 6 has a property that its concentration increases as it becomes magnetic. Reference numeral 7 denotes a non-magnetic rocking rod. A magnetic pendulum 8 is attached to the lower end of the rocking rod 7, and a portion slightly above the center of the rocking rod 7 is supported by spherical bearings 9, 10, so that it can move freely in any direction in the plane. It is made swingable.
Then, the pendulum 8 is immersed in a magnetic fluid, and a magnet 12 is attached to the upper end of the swinging rod 7.
Place reed switch 1 in a symmetrical position divided into four parts with
Four numbers 3 and 13 are provided in the plane direction. These reed switches 13, 13 are electrically connected in parallel, and an alarm buzzer 5 is connected to one end of the connection.

[Effect]

When a current flows through the coil 2, magnetic lines of force are generated, the pendulum 8 becomes magnetic, the magnetic fluid 6 also becomes magnetic, and its concentration increases. As the concentration of the magnetic fluid 6 increases, the movement of the pendulum 8 becomes slower. Therefore the volume
By adjusting the coil current using VR, the agility of the pendulum 8 movement can be adjusted. Namely Volume VR
If the resistance of the magnetic fluid 6 is adjusted to be large, the amount of current will be small (in some cases it will be zero), and the magnetic concentration of the magnetic fluid 6 will be in a thin state, so that it will not respond to small externally applied accelerations or inclination angles. However, the pendulum 8 acts sharply, and the magnet 12 approaches the reed switch 13 more frequently, increasing the frequency of activation of the alarm buzzer 5. Also Volume VR
If the adjustment of the resistance is made small, the amount of current flowing through the coil 2 will increase, and the concentration of the magnetic fluid 6 will increase, making it less susceptible to external acceleration or tilt angle, making it easier to measure large accelerations. make it suitable.

[Effect of idea]

According to the present invention, by adjusting the volume,
Since the operating sensitivity of the pendulum that operates the alarm buzzer can be freely adjusted, the alarm buzzer can be operated over a wide range of conditions commensurate with the type of vehicle and the driving level of the driver. In particular, this invention uses magnetic fluid to adjust the pendulum, and changes the concentration depending on the magnitude of magnetism.
Since the movement of the pendulum is controlled, the elasticity of the pendulum does not deteriorate even after long periods of use, and the correct adjustment is always made.

[Brief explanation of the drawing]

The drawings show an embodiment of the vehicle driving condition sensing device according to the present invention, and FIG. 1 is a longitudinal sectional view, and FIG.
The figure is an explanatory diagram of the arrangement of the reed switches, and FIG. 3 is a connection circuit diagram between the reed switches and the alarm. 1...Case, 2...Coil, 3...Alarm,
6... Magnetic fluid, 7... Rocking rod, 8... Pendulum, 1
2...Magnet, 13...Reed switch.

Claims (1)

[Scope of utility model registration request] Wrap it around the outer circumferential surface of the case containing the magnetic fluid,
A coil in which a volume meter is interposed, a pendulum of a magnetic material supported in the case so as to be able to swing in a free direction and immersed in a magnetic fluid contained in the case, a magnet fixed to the upper end of the pendulum, and a magnet. A vehicle driving condition sensing device consisting of a plurality of reed switches arranged around the vehicle, the reed switches being electrically connected to the above-mentioned coil via an alarm.