JPS6382324A - Vibration detector - Google Patents

Abstract

PURPOSE:To always arrange a vibration detecting sensor at an accurate position without adjusting the accurate position suitable for detection prior to arranging said sensor, by automatically adjusting the position of the vibration detecting sensor on a structure being an object to be measured. CONSTITUTION:The vibration generated in a structure being an object 2 to be measured is detected by a vibration detecting sensor 1 and a vibration detection signal 4 is inputted to a control part 6. The vibration frequency of said signal 4 is analyzed by a vibration signal analyser 7 to output a plurality of vibration component levels. The movement order generator 8 inputting the output of the analyser 7 outputs an order signal for moving the sensor 1 to a position suitable for detecting vibration on the basis of the analytical result. Said order signal is amplified by an amplifier 9 and the movement order signal 5 is applied to a moving mechanism 3 from a control part 6 to automatically move the sensor 1 on the object 2 to be measured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention F3A relates to a vibration detector, for example, to a device for detecting vibrations of a structure or a machine.

[Conventional technology]

Figure #113 is a diagram showing a conventional vibration detector. In the figure, (2) is the structure where vibrations are detected, and (lO) is the vibration detector installed at a specific position of the structure (2). So, for example, the vibration sensor, arrow (4) is the vibration sensor! /-(10)
This is the detection signal of

Next, the operation will be explained. The vibrations generated in the structure (2) are detected by the vibration sensor (lO) ◎For example, if an acceleration sensor is used as the vibration sensor (10), the acceleration of the vibration is detected, and if a position sensor is used, the vibration The amplitude of is detected.

[Problem that the invention seeks to solve]

By the way, the vibration of the structure (2) is the sum of multiple vibration components with different natural frequencies, and the amplitude of each of these vibration components changes in a complex manner depending on its position on the structure (2). . Therefore, it is difficult to know the best installation position for vibration detection before measurement. Since the conventional vibration detector is installed at a fixed position on the object to be measured, it is difficult to place the detector at the ninth best position for vibration detection. Additionally, if the vibration characteristics change after installation, there are other problems such as the inability to adapt.

This invention was made to solve the above-mentioned problems, and there is no need to know the best installation position before installing the detector. The purpose of this invention is to obtain a vibration detector that can perform vibration detection at a position suitable for vibration detection.

[Means for Solving Problems J] The vibration detector according to the present invention includes a vibration detection sensor that detects the vibration of an object to be measured and outputs a vibration detection signal, and a vibration detection sensor that receives the vibration detection signal and outputs a vibration detection signal. By providing a control unit that outputs a movement command signal for the position on the object to be measured, and a movement mechanism that moves the vibration detection sensor on the object to be measured using the movement command signal, the vibration detection sensor can be used to move the object. It is equipped with a mechanism that automatically moves the detector to a position suitable for detecting the vibration of the object to be measured.

[Operation] The vibration detector of the present invention uses the vibration detection signal to check the detection sensitivity of each vibration vJJ component, and in order to increase or lower the detection sensitivity, in which direction is the vibration detection sensor moved from the current installation position? It visually determines whether it should be moved and automatically adjusts the installation position of the vibration detection sensor using a moving mechanism.

[Embodiment J Hereinafter, one embodiment of the present invention will be described with reference to the drawings. 1st
In the figure, (1) is a vibration detection sensor, (2) is an object to be measured whose vibration is detected, such as a structure, arrow (4) is a vibration detection signal output from the detection sensor (1), and (3) is a vibration detection signal output from the detection sensor (1). is a moving mechanism that moves the detection sensor (1) on the structure (2), arrow (5) is a movement command signal of the detection sensor (1) that gives a movement command to the Vi movement mechanism (3), and (6) is a movement command signal of the detection sensor (1) that gives a movement command to the movement mechanism (3). ? FIG. 2 is a block diagram showing in detail an example of the control section (6). In FIG. 2, (4), (5) are the same vibration detection signals and detection sensors as in Figure 1, respectively. (1)
This is the movement command signal. (A vibration signal analyzer that analyzes the force Fi vibration detection signal (4) and analyzes the frequency. (8) determines the appropriate installation position of the vibration detection sensor (1) from the analysis results of the analyzer (7). A movement command generator (9) is an amplifier that amplifies the command value of the movement command generator (8).

Next, the operation will be explained. The vibrations generated in the structure (2) are detected by the vibration detection sensor (1) K and output as a vibration detector'+ (4). This faith') <4
) is input to the control unit (6), subjected to vibration MJ failure analysis by the vibration signal analyzer (7), and divided into a plurality of vibration components.
The level of each vibration component is obtained. Movement command generator (8)
is a vibration detection sensor using the analysis results from this analyzer (7). (1) Generates a movement command signal so that the sensor moves to a position suitable for detection. Amplifier (9) Vi amplifies this movement designation signal and sends it to the sensor movement mechanism (3). As a result, the moving mechanism (3) operates, and the structure (2)
) on which the vibration detection sensor (1) moves to a position suitable for vibration detection. For example, if you want to increase the detection sensitivity of a vibration component due to a certain vibration wJ, use a vibration signal analyzer (which extracts this vibration component by force and examines its level while detecting the vibration component).
(1) is moved in the direction of increasing the level. Conversely, if you want to lower the sensitivity,
Detection sensor in the direction of decreasing level? All you have to do is move (1).

In the above embodiment, as shown in FIG. 1, the vibration detection sensor (1) is attached to the outside of the moving mechanism (3). (
Any configuration may be used as long as the vibration detection sensor (1) can move on the structure (2) according to 3).

[Effect of the Invention J As described above, according to the present invention, the position of the vibration detection sensor on the structure to be measured is automatically adjusted, so that the position suitable for detection can be found. There is no need to check accurately before installation, and even if the vibration characteristics change after installation,
This has the effect of providing a vibration detector that can perform detection at a position suitable for regular &C vibration detection.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a vibration detector according to an embodiment of the present invention, FIG. 2 is a block diagram showing a control i+g1 part according to an embodiment of the invention, and FIG. 3 is a diagram showing a conventional vibration detector. FIG. In the figure, (1) is the vibration detection centimeter, (2) is the object to be measured, (3) is the moving mechanism, (4) is the vibration detection signal, and (5) is
indicates a movement designation signal, and (6) indicates a control section. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Figure 1 fHJ Shita's first pee → Da 6: 'Yasu Kura (P Naka Figure 2 Figure 3

Claims (1)

[Claims] a vibration detection sensor that detects vibrations of the object to be measured and outputs a vibration detection signal; a control section that receives the vibration detection signal and outputs a movement command signal for the position of the vibration detection sensor on the object to be measured; and a vibration detector comprising a movement mechanism that moves the vibration detection sensor on the object to be measured in response to the movement command signal.