JP2935153B2 - Vibration pick-up - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration pickup, and is suitably applied to, for example, a vibration pickup of a stationary vibration meter and a vibration meter of a mounting type.

[0002]

2. Description of the Related Art A stationary vibration meter is conventionally used for measuring the level of pollution vibration generated mainly in factories, construction sites, roads and the like. That is, FIG.
As shown in FIG. 6, the stationary vibrometer 1 is used by placing a vibration pickup 3 formed separately from the vibrometer main body 2 on the ground, floor or seat at the vibration measurement point. ing. The vibration pickup 3 is shown in FIGS.
As shown in FIG. 8, one to three sensing elements (not shown) made of piezoelectric elements are housed in a hollow pickup case 4 formed in a substantially cylindrical shape.

Each sensing element has a sensing axis in one direction in a horizontal plane (X-axis direction), one direction in the same horizontal plane perpendicular to the X-axis direction (Y-axis direction), or a vertical direction (Z-axis direction). The connector 5 disposed on the peripheral side surface of the pickup case 4 and the vibration amount in each axial direction detected by measurement as an electric signal (hereinafter referred to as a vibration detection signal). The vibration is transmitted to the vibrometer main body 2 via a cable 6 connected to the connector 5. The vibration meter main body 2 is configured to level the vibration amount detected by each sensing element based on, for example, a vibration detection signal, and to display the level on a level meter 7 provided on a front panel. The user can visually confirm the measurement result in real time.

[0004]

By the way, in this type of vibration pickup 3, the surface of the pickup case 4 usually has an arrow shape indicating one direction parallel to the direction of the sensing axis of each sensing element and simultaneously indicating the opposite direction. (Hereinafter referred to as a double-headed arrow symbol) is provided so that the user can confirm the sensing axis direction of the sensing element. For example, a vibration pickup capable of measuring the amount of vibration in three axial directions (a vibration pickup for three axes)
In FIG. 3, as is clear from FIGS. 17 and 18, a double-headed arrow symbol 10A indicating the X-axis direction and the Y-axis direction is provided on the upper surface.
10B are indicated, and a double-headed arrow symbol 10C indicating the Z-axis direction is indicated on the circumferential side surface.

However, when the direction of the sensing axis of each sensing element is described using the double-headed arrows 10A to 10C, the direction of the positive electrode of each sensing element (that is, the sensing element is detected as swinging in the positive direction). However, there is a problem that the direction in which the vibration detection signal is output with a positive polarity and the direction of the negative electrode (that is, the direction in which the sensing element detects the fluctuation in the negative direction and outputs the vibration detection signal with a negative polarity) are not known. Was. And when the positive electrode direction and the negative electrode direction of each sensing element are unknown as described above, for example, when performing a vibration mode analysis of a building, the building is displaced in any direction from the positive or negative of the vibration detection signal voltage. If it is not possible to judge, the inconvenience will occur. Therefore, as a method of avoiding such inconveniences, it is widely practiced to apply a vibration to a vibration pickup in advance to measure the positive electrode direction and the negative electrode direction of each sensing element before measuring the vibration. According to this method, it is necessary to perform such a check before the vibration measurement, and thus there is a problem that the vibration measurement operation becomes complicated. Further, in the case of the vibration pickup, whether the vibration pickup 3 is one-axis, two-axis, or three-axis is determined by visually observing the upper surface and the peripheral side surface and confirming the presence or absence of the double-headed arrows 10A to 10C. It is necessary to make a determination, and therefore, there is a problem in that the determination operation is complicated only by the notation method of the sensing axis direction of each sensing element.

The present invention has been made in view of the above points, and an object of the present invention is to propose a vibration pickup which can greatly improve the usability.

[0007]

According to the present invention, there is provided a vibration pickup in which one or a plurality of sensing elements for detecting an amount of vibration are accommodated in a vibration pickup in a case. Marks 23A to 23A on the surface of case 22 indicating the direction of each sensing axis of the plurality of sensing elements, and the positive direction and / or the negative direction of each sensing axis.
C, 31A to 31C.

In the present invention, the mark 23A
23C and 31A to 31C are collectively written on one of the surfaces of the case 22. Further, in the present invention, the marks 23A to 23C, 31A to 31
As C, arrow symbols 23A to 23C and 31A to 31C pointing in the positive electrode direction and / or the negative electrode direction of each sensing axis, respectively, were used.

[0009]

The mark 23A indicates the direction of each sensing axis of one or a plurality of sensing elements, and the positive direction and / or the negative direction of each sensing axis.
23C and 31A to 31C are indicated on the surface of the case 22 so that the user can use the marks 23A to 31C.
Based on 23C and 31A to 31C, the direction of the sensing axis of each sensing element and the direction of the positive electrode and / or the direction of the negative electrode of each sensing axis can be easily confirmed.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

(1) First Embodiment FIGS. 1 to 4 in which parts corresponding to those in FIGS. 16 to 18 are denoted by the same reference numerals, show a stationary three-axis vibrometer 2 according to the first embodiment.
0, and two predetermined orthogonal directions (X-axis direction, Y-axis direction) and a vertical direction (Z-axis direction) on the same horizontal plane are provided in a hollow pickup case 22 formed in a hollow, substantially cylindrical shape of the vibration pickup 21. ), Three sensing elements (not shown) are respectively housed such that the sensing axes are directed to the respective sensing elements. On the upper surface of the pick-up case 22, three arrow symbols 23A, 23B, and 2A indicating the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively, are clearly shown in FIG.
3C are collectively described so that the sensing axis direction of each sensing element can be confirmed at a glance.

In the case of the embodiment, as the arrow symbols 23A and 23B indicating the X-axis direction and the Y-axis direction, symbols indicated by arrows are used, and the arrow symbol 23C indicating the Z-axis direction is used.
Is used to indicate the direction from the back side to the front side of the drawing in which a black dot is written at the center of the circle.
Further, each of the arrow symbols 23A to 23C is written so as to face the positive direction of the sensing axis of the corresponding sensing element. Further, in the vicinity of each of the arrow symbols 23A to 23C, the characters 24A, 24B, 24 of "X", "Y" or "Z" are provided according to the direction of the sensitive axis of the corresponding acceleration pickup.
C is written, so that the user can easily understand which sensitive axis direction is measured as the vibration in the X to Z axis directions.

In the above arrangement, the positive direction of the sensing axis of each sensing element housed in the vibration pickup 21 is indicated collectively on the upper surface of the pickup case 22 using arrow symbols 23A to 23C. Thus, the direction of the positive electrode of the sensing axis of each sensing element can be easily and reliably recognized, and the number of the vibration pickup 21 to which the vibration pickup 21 is applied can be immediately confirmed by looking at the top surface of the pickup case 22 at a glance. can do.

According to the above construction, the vibration pickup 2
The positive direction of the sensing axis of each sensing element housed in the pickup case 22 is collectively indicated on the upper surface of the pickup case 22 by using arrow symbols 23A to 23C. The direction of the positive electrode of the sensing axis of the sensing element can be easily and surely confirmed, and the vibration pickup 2 can be seen at a glance at the top surface of the pickup case 22.
It is possible to confirm how many axes 1 is for, and thus a vibration pickup that can greatly improve the usability can be realized.

(2) Second Embodiment FIG. 5 in which parts corresponding to those in FIGS. 1 to 4 are assigned the same reference numerals, shows a vibration pickup 30 of a vibrometer according to a second embodiment, and includes an X-axis, a Y-axis and a vibration pickup. Arrow symbols 31A, 31B, and 31C indicating the positive direction of the Z-axis, respectively, and a symbol "+" 32
A, 32B, and 32C (hereinafter referred to as pole indication symbols 32A, 32B, and 32C, respectively) are attached to the vibration pick-up 2 of the vibrometer 20 of the first embodiment.
1 is formed in the same manner.

In the case of the second embodiment, as shown in FIG. 6, the pole display symbols 32A, 32B, and 32C are the tips of arrow symbols 31A and 31B indicating the positive direction of the X axis and the Y axis, respectively, and the Z axis. Are marked so that approximately half of each symbol overlaps the outer circle of the arrow symbol 31C indicating the positive electrode direction.

According to the above configuration, each of the arrow symbols 31A to 31A
By displaying the pole indication symbols 32A to 32C with 31C, the user can easily and reliably grasp the positive direction of the X-axis, Y-axis, and Z-axis, and thus is easier to use than the first embodiment. The vibration pick-up that can improve the vibration can be realized.

(3) Other Embodiments In the above-described first and second embodiments, the present invention is applied to a third embodiment.
The case where the present invention is applied to the vibration pickups 21 and 30 for shafts has been described. However, the present invention is not limited to this, and can also be applied to vibration pickups for one shaft or two shafts.

In the first and second embodiments described above, the positive direction of the sensing axis of each sensing element is indicated by the arrow symbols 23A to 23A.
23C, 31A to 31C are used for display, but the present invention is not limited to this, and the display method in the positive direction of the sense axis is displayed using another mark. Is also good. In this case, for example, FIGS.
The positive direction of the sensing axis of each sensing element may be indicated as shown in FIG.

Further, in the above-described first and second embodiments, the case where the present invention is applied to the stationary vibrometer 20 has been described. However, the present invention is not limited to this. It is suitable for application to various other vibrometers such as a vibrometer and a vibration pickup of the vibrometer.

Further, in the above-described first and second embodiments, the arrow symbols 23A to 23C and 31A to 31C are described so as to face the positive direction of the sensing axis of each sensing element housed therein. Although the case has been described, the present invention is not limited thereto, and an arrow symbol may be written so as to face the negative direction of the sensing axis, or to face the positive direction and the negative direction of the sensing axis. With an arrow symbol on
A pole indication symbol consisting of “+” and / or “−” may be written near or in the vicinity of the arrow symbol pointing in each pole direction.

Further, in the above-mentioned second embodiment, in order to indicate that the arrow symbols 31A to 31C indicate the positive electrode directions of the corresponding sensing elements, respectively, the polar display symbols 32A to 32C indicated by "+". Is described, but the present invention is not limited to this. For example, "plus"
May be used, and various other marks and characters may be used as the polar display symbols.

Further, in the above-described first and second embodiments, the case where the arrow symbols 23A to 23C, 31A to 31C and the like are described on the upper surface of the pickup case 22 has been described. However, if the arrow symbols 23A to 23C, 31A to 31C and the like are collectively displayed on the surface of the pickup case 22, the display positions of the arrow symbols 23A to 23C and 31A to 31C are on the pickup case 22. The position other than the side surface may be used.

[0024]

As described above, according to the present invention, in the vibration pickup, the direction of the sensing axis of each sensing element housed in the case and the direction of the positive electrode and / or the direction of the negative electrode of each sensing axis are indicated. Since the mark is written on the surface of the case, based on the mark, the sensing axis direction of each sensing element and the positive direction and / or the negative direction of the sensing axis can be easily confirmed, and thus, It is possible to realize a vibration pickup that can significantly improve the usability.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire configuration of a stationary vibrometer to which the present invention is applied.

FIG. 2 is a top view showing a vibration pickup of the first embodiment.

FIG. 3 is a side view showing the vibration pickup of the first embodiment.

FIG. 4 is a side view showing the vibration pickup of the first embodiment.

FIG. 5 is a perspective view showing a vibration pickup according to a second embodiment.

FIG. 6 is a plan view showing the states of arrow symbols and pole display symbols according to the second embodiment.

FIG. 7 is a plan view showing another embodiment.

FIG. 8 is a plan view showing another embodiment.

FIG. 9 is a plan view showing another embodiment.

FIG. 10 is a plan view showing another embodiment.

FIG. 11 is a plan view showing another embodiment.

FIG. 12 is a plan view showing another embodiment.

FIG. 13 is a plan view showing another embodiment.

FIG. 14 is a plan view showing another embodiment.

FIG. 15 is a plan view showing another embodiment.

FIG. 16 is a perspective view showing a conventional stationary vibrometer.

FIG. 17 is a top view showing the vibration pickup of FIG. 16;

FIG. 18 is a top view showing the vibration pickup of FIG. 16;

[Explanation of symbols]

1, 20: Vibrometer, 3, 21, 30: Vibration pick-up, 4, 22: Case (pick-up case), 2
3A to 23C, 31A to 31C ... arrow symbols, 32A to
32C ... Pole display symbol.

Claims (3)

(57) [Claims] 1. A 1 detects the vibration momentum or more sensitive elements is
In the vibration pickup housed in the case, the direction of each sensing axis of the one or more sensing elements and the direction of the sensing
Of the above case showing the positive direction and / or the negative direction of the axis
Vibration pickup to mark the surface, characterized in that the representation. 2. The mark is provided on the surface of the case.
2. The vibration pickup according to claim 1, wherein the vibration pickup is collectively displayed on one of the surfaces. 3. The mark is located on each of the sensing axes.
Be in serial positive direction and or arrow symbols pointing negative direction
The vibration pick-up according to claim 1 or 2, wherein
Up.