JPH01296166A - Fixing method of accelerometer cable - Google Patents

Abstract

PURPOSE:To stabilize the performance of an accelerometer, by turning round an introducing portion of a cable from above to below said accelerometer with a minimum bending radius not affecting the capability of said accelerometer. CONSTITUTION:A cable 3 of an accelerometer 1 fixed to a measuring surface 2 is bent with a minimum radius so that no kinds are generated at an introducing portion thereof. The cable 3 is turned from above the accelerometer therebelow. Then, a lower portion of the cable 3 is fixed to a rear portion of the accelerometer 1. The vibrations of the cable 3 in a vertical and a horizontal directions are restricted by the turn of the cable 3. Therefore, the irregularity in the sensitivity of the acceleration of the accelerometer due to the vibrations of the cable 3 can be removed, thereby stabilizing the performance of the accelerometer.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for securing an accelerometer cable.

(Prior Art) Conventionally, an accelerometer cable has been fixed in a manner as shown in FIG. 3 or 4.

Referring to FIG. 3, the accelerometer 1 is attached to the measurement surface 2 with screws or the like, and its accelerometer cable 3 is raised directly above and fixed to the surrounding horizontal relics 14 with tape 15 or the like.

Also, to explain FIG. 4, the accelerometer 1 is attached to the measurement surface 2 with screws, etc., and the accelerometer cable 3 is fixed at an appropriate position on the measurement surface 2 on the side of the accelerometer 1 with tape 15 or the like. That's what I do.

(Problem to be Solved by the Invention) However, in the conventional method of fixing an accelerometer cable as described above, the vibration of the measurement surface is transmitted to the cable, and the free cable part up to the cable fixing part vibrates greatly, which reduces the acceleration sensitivity. This causes a problem in that the deviation in the acceleration sensitivity frequency characteristics becomes large, making it difficult to obtain stable performance.

FIG. 5 is a diagram showing such conventional acceleration sensitivity frequency characteristics.

As shown in this figure, according to the conventional method of fixing the accelerometer cable, the deviation of the acceleration sensitivity frequency characteristics becomes large, making it impossible to obtain stable performance.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for fixing an accelerometer cable that eliminates the variation in acceleration sensitivity caused by the vibration of the accelerometer cable and provides stable performance with small deviations in acceleration sensitivity frequency characteristics.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a method for fixing an accelerometer cable, in which the lead-out portion of the accelerometer cable is provided with a minimum bending radius that does not have an adverse effect; The cable is turned round from above to below the accelerometer, and the lower part of the cable is fixed to the side surface of the accelerometer.

(Function) According to the present invention, as shown in FIG. 1 and FIG. Since the lower part of the cable 3 is fixed to the accelerometer pedestal 1-a, which is the side surface of the accelerometer 1, the accelerometer cable 3 is connected in the vertical (up and down) direction and in the horizontal ( As a result, the free portion of the accelerometer cable 3 can be restrained from swinging in the vertical and horizontal directions.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view illustrating a method of fixing an accelerometer cable according to an embodiment of the present invention, and FIG. 2 is a top view thereof.

As shown in these figures, the accelerometer 1 is fixed to the measurement surface 2 with screws or the like. The minimum bending radius at the lead-out part of the accelerometer cable 3 that does not adversely affect the cable such as kinking, for example, the cable diameter D (for example, 5 m
The bending radius is approximately 5 times that of +11 to 6II1 m), and is bent downward from above the accelerometer 1.

The lower part of the cable thus turned is fixed to the side part of the accelerometer 1. That is, the clamp 5 is fastened together with the accelerometer mounting screw 6 into the mounting hole 1-b provided in the accelerometer pedestal 1-a.

In this way, the bending radius is the minimum that does not adversely affect the accelerometer cable 3, and the cable 3 is turned round from above the accelerometer 1 to below, and the lower part of the cable 3 is connected to the side of the accelerometer 1. Fix it to the accelerometer pedestal 1-a.

With this configuration, as is clear from FIG. 1, the turns of the accelerometer cable 3 restrain the cable 3 in the vertical (up and down) direction, suppressing vibration in the vertical (up and down) direction, and As is clear from FIG. 2, the accelerometer cable 3 is restrained in the horizontal direction, and horizontal vibrations are suppressed.

FIG. 6 is a diagram showing acceleration sensitivity frequency characteristics according to the method of fixing an accelerometer cable according to the present invention.

As is clear from the comparison with FIG. 5, according to the method of fixing the accelerometer cable according to the present invention, variations in acceleration sensitivity are eliminated and deviations in acceleration sensitivity frequency characteristics are reduced.

In the above embodiment, an example is shown in which the accelerometer cable is led out from above the accelerometer, but it is also possible to apply an example in which the accelerometer cable is led out from the side of the accelerometer.

Furthermore, the present invention is not limited to the above embodiments,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the Invention) As described above in detail, according to the present invention, the lead-out portion of the accelerometer cable is set to the minimum bending radius (5 times the diameter of the cable) that does not cause any adverse effects, and the cable is By making a circular turn from the top to the bottom of the accelerometer, and fixing the lower part to the side of the accelerometer, the cable can be restrained vertically and horizontally, and the acceleration due to vibration of the accelerometer cable can be restrained. It is possible to eliminate variations in sensitivity and obtain stable performance with small deviations in acceleration sensitivity frequency characteristics.

In addition, the height of the cable extending above the accelerometer is minimized, which reduces the occupied area and allows for a compact configuration.

[Brief explanation of the drawing]

FIG. 1 is a side view illustrating a method of fixing an accelerometer cable according to an embodiment of the present invention, FIG. 2 is a top view thereof, and FIG. 3 is a side view illustrating a conventional method of fixing an accelerometer cable.
FIG. 4 is a side view illustrating another conventional method of fixing an accelerometer cable, FIG. 5 is a diagram showing conventional acceleration sensitivity frequency characteristics, and FIG. 6 is a diagram showing acceleration sensitivity frequency characteristics of the present invention. . 1... Accelerometer, 1-a... Accelerometer pedestal, 1-b
... Mounting hole, 2... Measurement surface, 3... Accelerometer cable, 5... Clamp, 6... Accelerometer mounting screw. Patent Applicant Oki Electric Industry Co., Ltd. Agent Patent Attorney Shimizu 9. Figure 4 Discipline e (99*-ゞ shouting deaf 0

Claims (1)

[Claims] The lead-out part of the accelerometer cable has a minimum bending radius that does not cause any adverse effects, and the cable is turned round from above to below the accelerometer, and the lower part of the cable is fixed to the side of the accelerometer. A method for fixing an accelerometer cable, characterized by: