JPH02298811A - Detecting device of change in state of object - Google Patents

Abstract

PURPOSE:To enable easy detection of a state of longitudinal and lateral inclination of an object by suspending a second detecting member in a hollow cylinder supported rotatably and by detecting relative shifts of the two members. CONSTITUTION:A hollow cylinder 5, which is a first detecting member 4, is supported rotatably in all directions by a spherical supporting body 6 being fitted in a freely fitting hole 3. In this cylinder 5 a second detecting member 7 is suspended so that a permanent magnet 8 in the lower part thereof faces a Hall element 9 of the cylinder 5. On the occasion of employment, first a coil 14 of a fixing means 11 is electrified to release fixation of the cylinder 5, and the cylinder 5 and the member 7 are set in a vertical state. Then, the coil 14 is electrified and the cylinder 5 is fixed by a spring 13. When an object is inclined in this state, an electromotive force of the magnet 8 and the Hall element 9 decreases and the inclination can be detected therefrom. By mounting a device thus constituted on a vehicle, therefore, theft of the vehicle or a tire thereof can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to a situation where an object such as a car is lifted from a parked state by a towing vehicle, jack, etc.
The present invention relates to an object state change detection device that detects a change in the state of the object.

[Conventional technology]

In order to prevent theft of automobiles, etc., a system has been proposed that detects when a parked automobile is tilted and issues an alarm (Japanese Patent Application Laid-open No. 84514/1983).

(Problem to be solved by the invention) However, although the conventional method can detect when a car is tilted in the front and rear directions, it is possible to detect when the car is tilted in the left and right direction, that is, when the car is tilted left and right in order to steal tires. The problem was that it could not be detected.

SUMMARY OF THE INVENTION An object of the present invention is to provide an object state change detection device that can detect a target object no matter which direction it is tilted.

(Means for Solving the Problems) A state change detection device according to the present invention includes a first detection member whose upper end side is rotatably supported in all directions; a second sensing member, a fixing means for switching and controlling one of the first and second sensing members to be rotatable and fixed; The device is equipped with a relative displacement detecting means that is activated when the relative displacement of the distance to the object that is not detected exceeds a predetermined value.

[Operation] In this invention, one of the first detection member and the second detection member is fixed, and the other can be set to be rotatable in all directions, so a change in the state of the object can be detected no matter which direction the object is tilted. be able to.

〔Example〕

FIGS. 1(a) to (d) show an embodiment of the present invention, in which 1 is a housing, 2 is a suspension plate, 3 is a loose fitting hole provided on this suspension plate 2, and 4 is a third embodiment of the present invention. The detection member 1 is composed of a hollow cylinder 5 having a truncated conical cross section, and a support sphere 6 is fixed to the upper end side by appropriate means, and the diameter of the support sphere 6 is made larger than the diameter of the loose fitting opening 3. As a result, the first sensing member 4 is supported at the upper end so as to be rotatable in all directions, that is, in any direction. Reference numeral 7 designates a second sensing member, in which a part of a flexible string is fixed to the upper end side inside the first sensing member 4, and a permanent magnet 8 is attached to the lower end side. On the other hand, a Hall element 9 is attached to the lower end side of the first detection member 4 so as to face the permanent magnet 8, and the permanent magnet 8 and the Hall element 9 constitute a relative displacement detection means 10. 1
1 is a fixing means, which includes a plunger 12 and a spring 13. coil 1
4, and the spring 1 that does not energize the coil 14
As shown by the dotted line, the extension force of plunger 1
2 presses the top of the support sphere 6 against the suspension plate 2 side to prevent the first detection member 4 from rotating, and when the coil 13 is energized, the brassiere 12 compresses the spring 13 as shown by the solid line. Then, the first detection member 4 is released from its fixation.

Next, how to use it will be explained.

FIG. 1(a) explains the setting state when the object S is in a horizontal state. When the object state change detection device 100 of the present invention is mounted on the object S and the coil 14 of the fixing means 11 is energized, the first Since the fixation of the detection member 4 is released, the first detection member 4 becomes vertical due to gravity. Similarly, the second detection member 7 is also in a vertical state. Thereafter, the force of the barb 13 that stops the energization of the coil 14 causes the first detection member 4
is fixed. The settings are now complete.

When the object S set in this manner is tilted as shown in FIG. The member 7 remains vertical. Therefore, since the permanent magnet 8 and the Hall element 9 are separated from the opposing position, the electromotive force of the Hall element 9 is reduced. Therefore, it is recognized that the state of the object S has changed when the decrease value of this output becomes less than a certain value.

FIGS. 2(a) and 2(b) are examples in which the object S is inclined from the beginning, and by setting as shown in FIG. 2(a), the first... The second sensing elements 4.7 are both relatively inclined, but both are vertical. From this state, if the object S is made horizontal as shown in FIG. 2(b), the first detection member 4 moves integrally with the housing 1, but
The second sensing member 7 remains vertical. Therefore, in this case as well, a signal is output from the relative displacement detection means 10, and a change in the state of the object S is detected.

FIG. 3 shows an example of the circuit of the relative deviation detection means 10, where AMP is an amplifier, COM is a comparator, D, D2 are diodes, INV is an inverter, Q is a transistor, and R
Y is a relay, ry is its contact, R, NR, 0 are resistors,
C is a capacitor.

As shown in FIGS. 1 and 2, when the Hall element 9 and the permanent magnet 8 are facing each other, the voltage generated in the Hall element 9 becomes maximum, an output is output from the comparator COM, and the capacitor C
is charged, the output of inverter INV becomes “L”,
Since the transistor Q is non-conducting and the relay RY is not energized, the contact ry is turned off, the horn circuit is not closed, and it can be seen that there is no change in the state of the object S.

When the object S is tilted as shown in FIG. 1(b) and FIG. 2(b), the output of the Hall element 9 becomes low, and no output is output from the comparator M. Therefore, the charge in the capacitor C is transferred to the resistor R.
After discharging through 9, the output of inverter INV becomes “H”.
'', transistor Q is turned on, relay RY is operated, its contact ry is turned on, and the horn circuit is closed, thereby indicating that the state of object S has changed.

FIG. 4 shows another embodiment of the present invention, and FIG.
As in the embodiment shown in FIG.
This is done through a lever plate 19 instead of being pressed directly. That is, a screw 15 serving as a fulcrum is installed in the suspension plate 2, and a hole 16 is made in the suspension plate 2, and a screw 17 is inserted into the hole 16.
insert the spring 18 on the lower side of the suspension plate 2, and insert the screw 17
The upper end of the plunger 12 is loosely fitted into an appropriate position of the lever plate 19, and the upper end of the plunger 12 is loosely fitted to one end of the lever plate 19. Further, 20 is a fixing means when not in use, and coil 21. Plunger 22. It consists of a spring 23° and a locking ring 24.

Next, the operation will be explained.

When the coil 21 of the fixing means 20 is not energized, the spring 23
As a result, the plunger 22 protrudes as shown, disengaging the locking ring 24 from the first sensing member 4. When the coil 14 of the fixing means 11 is not energized in this state, the lever plate 19 is kept at the position indicated by the solid line by the extension force of the spring 18.
The plunger 12 also assumes a protruding position using the screw 16 as a fulcrum. Therefore, the support sphere 6 is pressed down by the lever plate 19. When the coil 14 is energized, the plunger 12 descends, and the lever plate 19 moves to the position indicated by the dotted line using the screw 15 as a fulcrum, and the fixation of the support sphere 6 is released.

Therefore, it is possible to perform exactly the same operation as explained in FIGS. 1 and 2. In addition, when not in use, the plunger 2 with the coil 21 energized, as shown in FIG.
2, the locking ring 24 pulls the first sensing member 4 towards it and tilts it, so the second sensing member 7 comes into contact with the inside of the first sensing member 4, so that the object S is closer to the vehicle, etc. In this case, it is possible to prevent the second detection member 7 from swinging and making noise or being damaged when the vehicle is running.

FIG. 6 shows still another embodiment of the present invention, in which a fixing means 11 is provided below the first sensing member 4. As shown in FIG. In this embodiment, the support sphere 6 is made of a magnetic material, and is magnetically attracted by a permanent magnet 25 to support the first detection member 4 so as to rotate in all directions. Note that 25 is a thin plate such as a stainless steel plate, which prevents the support sphere 6 from coming into direct contact with the permanent magnet 25. A fixing member 27 is attached to the upper end of the plunger 12 and is movable up and down. In the illustrated state, the coil 14 is energized, the plunger 12 is lowered, and the fixation of the first detection member 4 is released. Indicates the condition.

In addition, in the above embodiment, the second detection member 7 was constructed of a string, but in addition, as a structure similar to the first detection member 4,
Two loose fitting holes 3 are provided at a distance from each other on the suspension plate 2 and are arranged in parallel thereto.
The Hall element 9 and the permanent magnet 8 may be provided so as to face each other between them. In this case, one is the first. the other is the second
serves as a detection member.

Further, the relative displacement detection means 10 is not limited to the Hall element 9 and the permanent magnet 8, and it goes without saying that other proximity switches may be used. Further, the first and second detection members 4.7
As a supporting mechanism that is rotatable in all directions on the upper end side, in addition to using the above-mentioned loose fitting 3 and supporting sphere 6, a universal joint mechanism is used.

It goes without saying that other known mechanisms such as a ball bearing can be used.

〔Effect of the invention〕

As described in detail above, the present invention includes: a first sensing member whose upper end side is rotatably supported in all directions; a second sensing member whose upper end side is also rotatably supported in all directions; 1st. a fixing means for switching and controlling either one of the second detection members to be rotatable or fixed; Although the configuration is extremely simple, it is equipped with a relative displacement detection means that operates when the relative displacement between the fixed and unfixed second detection members exceeds a predetermined value. It is possible to accurately detect an object no matter what direction it is tilted in, front to back, left or right. Therefore, if installed in a car, it has the advantage that it is extremely effective not only in preventing theft of the car itself, but also in preventing theft of tires.

[Brief explanation of the drawing]

FIGS. 1(a) and (b) are cross-sectional views showing one embodiment of the present invention, and FIGS. 2(a) and (b) are cross-sectional views showing different settings of the embodiment of FIG. FIG. 3 is a diagram showing an example of the circuit of the phase shift detection means in the embodiment of FIGS. 1 and 2;
FIG. 4 is a partially cutaway front view showing another embodiment of the invention, FIG. 5 is an explanatory diagram of the operation of the embodiment of FIG. 3, and FIG. 6 is a partially cutaway front view showing another embodiment of the invention. FIG. In the figure, 1 is a housing, 2 is a suspension plate, 3 is a loose fitting opening, 4 is a first detection member, 5 is a hollow cylinder, 6 is a supporting sphere, 7 is a second detection member, and 8 is a permanent magnet. , 9 is a Hall element, 10 is a relative displacement detecting means, 11 is a fixing means, 12 is a plunger, 13 is a spring, and 14 is a coil. Figure 1 Figure 2 (a) Figure 4 Figure 5

Claims (1)

[Claims] A first sensing member whose upper end side is rotatably supported in all directions, a second sensing member whose upper end side is also rotatably supported in all directions, and either of the first and second sensing members. When the relative deviation in distance between the fixed means and the fixed and non-fixed one of the first and second detection members becomes equal to or more than a predetermined value; What is claimed is: 1. A state change detection device for an object, comprising a relative displacement detection means that operates.