JPH052858Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an acceleration sensor, and particularly to an acceleration sensor using a unimorph type or bimorph type acceleration detection element.

(Prior Art) FIG. 4 is an exploded perspective view showing an example of a conventional acceleration sensor. This acceleration sensor 1 includes a cylindrical case 2 with a bottom. Attachment part 3 of this case 2
A mounting hole 4 is formed in the. and,
An acceleration detection element 5 is held inside the case 2 .

The acceleration sensor 1 is fixed to a mounting surface by passing a bolt or the like through the mounting hole 4.
By using this acceleration sensor 1, acceleration in a direction substantially perpendicular to the plane of the acceleration detection element 5 can be detected.

(Problem to be solved by the invention) However, in such a conventional acceleration sensor, the surface of the acceleration detection element is arranged parallel to the mounting surface, so acceleration can only be detected in a direction approximately perpendicular to the mounting surface. Unable to detect.

Therefore, the main purpose of this invention is to provide an acceleration sensor that can selectively detect acceleration in a direction substantially perpendicular to the surface to which it is attached and in a direction substantially parallel to the surface.

(Means for Solving the Problems) This invention is an acceleration sensor including an acceleration detection element and a case for holding the acceleration detection element, and the case has a direction substantially parallel to the surface of the acceleration detection element. and an acceleration sensor in which mounting holes are formed in a direction substantially perpendicular to the surface thereof.

(Function) The surface of the acceleration detection element is arranged in a direction substantially perpendicular to the mounting surface or in a direction substantially parallel to the surface.

(Effect of the invention) According to this invention, depending on the direction in which the acceleration sensor is installed, it is possible to alternatively detect acceleration in a direction substantially perpendicular to the mounting surface and acceleration in a direction substantially parallel to the mounting surface. can.

In addition, by attaching the two acceleration sensors to the mounting surface so that the surfaces of the acceleration detection elements are substantially orthogonal to each other, it is possible to simultaneously It is possible to detect acceleration in the direction of

The above-mentioned objects, other objects, features and advantages of the present invention will become clearer from the following detailed description of embodiments with reference to the drawings.

(Embodiment) FIG. 1 is an exploded perspective view showing an embodiment of this invention. This acceleration sensor 10 includes a case 12 in the shape of a rectangular parallelepiped. The case 12 holds a bimorph acceleration detection element 14, for example. That is, a holding portion 16 for holding the acceleration detection element 14 is formed in the case 12. Holding part 1
6 is formed on one side 12a of the case 12 as a recess having a stepped portion. Further, the acceleration detection element 14 has electrodes 14b, 14b formed on both sides of a piezoelectric substrate 14a, for example. Then, the acceleration detection element 14 is connected to that surface and one surface 1 of the case 12.
2a are held on the stepped portion of the holding portion 16 so that they are substantially parallel to each other. At this time, the acceleration detection element 14
is held at both steps. However, the acceleration detection element 14 may be held at one step, or the acceleration detection element 14 may be held at its node point. This acceleration detection element 14
In this case, electrical output is obtained in response to acceleration in a direction substantially perpendicular to the plane.

Furthermore, the case 12 is provided with a structure on both sides of the holding part 16 from one side 12a of the case 12 to the opposite side 12a of the case 12.
2b, mounting holes 18a and 18b
is formed. Therefore, the mounting holes 18a and 18b are formed in a direction substantially perpendicular to the surface of the acceleration detection element 14. This mounting hole 18a
By passing a bolt or the like through 18b and 18b, the acceleration sensor 10 is attached to the mounting surface such that the surface of the acceleration detecting element 14 is arranged substantially parallel to the mounting surface.

Furthermore, mounting holes 20a and 20 are provided on both sides of the holding portion 16 from a surface 12c perpendicular to one surface 12a of the case 12 to the opposite surface 12d.
b is formed. Therefore, the mounting hole 20a
and 20b are formed in a direction parallel to the plane of the acceleration detection element 14. Furthermore, this mounting hole 2
0a is formed to be substantially perpendicular to the mounting hole 18a. Similarly, the mounting hole 20b is formed substantially perpendicular to the mounting hole 18b. By passing bolts or the like through these mounting holes 20a and 20b, the acceleration sensor 10
is attached to the surface of the acceleration detection element 14 so as to be arranged in a direction substantially perpendicular to the surface to which it is attached.

When installing this acceleration sensor 10, if the mounting holes 18a and 18b are used, the second
As shown in the figure, the surface of the acceleration detection element 14 and the surface to which it is attached are arranged substantially parallel to each other. Therefore,
In this case, the acceleration sensor 10 detects acceleration in a direction substantially perpendicular to the mounting surface.

Also, when installing the acceleration sensor 10, if the mounting holes 20a and 20b are used, the second
As shown in Figure B, the surface of the acceleration detection element 14 and the surface to which it is attached are arranged in a direction perpendicular to each other. Therefore, in this case, the acceleration sensor 10 can detect acceleration in a direction substantially parallel to the mounting surface.

Thus, depending on the mounting direction, this acceleration sensor 10 can detect either acceleration in a direction substantially perpendicular to the mounting surface or acceleration in a direction substantially parallel to the mounting surface. I can do it.

Further, an installation example when two acceleration sensors 10 are used is shown in FIG. 3. In this example, the mounting hole 18 of one acceleration sensor 10a is
a and 18b, and the mounting holes 20a and 20 of the other acceleration sensor 10b.
A bolt is passed through b. That is, one bolt is passed through the mounting hole 18a of one acceleration sensor 10a and the mounting hole 20a of the other acceleration sensor 10b. Similarly, one bolt is passed through the mounting hole 18b of one acceleration sensor 10a and the mounting hole 20b of the other acceleration sensor 10b. By doing this, one acceleration sensor 10a
The surface of the acceleration detection element 14 of the other acceleration sensor 10b is parallel to the mounting surface, and the surface of the acceleration detection element 14 of the other acceleration sensor 10b is orthogonal to the mounting surface. Therefore, in the example shown in FIG. 3, both the acceleration in the direction perpendicular to the mounting surface and the acceleration in the direction parallel to the mounting surface can be detected simultaneously.

In addition, in the embodiment of FIG. 1, the acceleration detection element 14
Although a bimorph type element is used, a unimorph type acceleration detection element may also be used.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of this invention. FIG. 2A and FIG. 2B are, respectively,
FIG. 2 is an illustrative view showing a state in which the acceleration sensor of the embodiment shown in FIG. 1 is attached to a mounting surface; FIG. 3 is an illustrative view showing an example of attachment when two acceleration sensors of the embodiment shown in FIG. 1 are used. FIG. 4 is an exploded perspective view showing an example of a conventional acceleration sensor. In the figure, 10 is an acceleration sensor, 12 is a case, 14 is an acceleration detection element, and 18a, 18b and 20a, 20b are mounting holes.

Claims (1)

[Claims for Utility Model Registration] An acceleration sensor including an acceleration detecting element and a case for holding the acceleration detecting element, the case including a sensor in a direction substantially parallel to a surface of the acceleration detecting element and in a direction substantially parallel to the surface of the acceleration detecting element. An acceleration sensor in which mounting holes are formed in substantially orthogonal directions.