Vibration detector and vibration detection system

Abstract

To allow for visually recognizing whether or not abnormal vibration has occurred.SOLUTION: A vibration detector for detecting equipment vibration comprises: a container which is at least partially transparent and which contains a substance exhibiting a non-Newtonian fluid property; a solid which is mixed into a substance and which remains stationary in a suspended state within the substance in a gel state, but which sinks or floats in a direction of gravity, within the substance in a sol state substance; and a stationary portion which is secured to the equipment.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vibration detector and a vibration detection system. [Background technology]

[0002] Conventionally, a vibration detection system has been known in which a cell filled with a dispersion of layered silicate mineral is placed between two polarizing plates, and the vibration sensor detects the molecular orientation of the dispersion of layered silicate mineral filled in the cell, which elastically deforms due to vibration, based on the amount of light transmitted through the polarizing plate (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-32751 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional vibration detection systems are unable to visually determine whether or not abnormal vibrations are occurring.

[0005] An object of the present invention is to provide a vibration detector and a vibration detector system that can visually recognize whether or not abnormal vibrations are occurring. [Means for solving the problem]

[0006] [1] A vibration detector according to one aspect of the present invention comprises: A vibration detector that detects vibration of a device, a transparent container at least partially containing a substance exhibiting non-Newtonian fluid properties; a solid mixed in the substance, the solid remaining suspended and stationary in the substance in a gel state, and sinking or floating in the direction of gravity in the substance in a sol state; a fixing part fixed to the device; Equipped with.

[0007] [2] A vibration detector according to one aspect of the present invention is the vibration detector according to [1] above, The concentration of the substance is determined according to the frequency of the detected vibration, the displacement, and the settling or floating velocity of the solid.

[0008] [3] A vibration detector according to one aspect of the present invention is the vibration detector according to [2] above, The frequency is the natural frequency of the device.

[0009] [4] A vibration detector according to one aspect of the present invention is the vibration detector according to [2] above, the device is a rotating device; The frequency is the rotation frequency of the rotating device.

[0010] [5] A vibration detector according to one aspect of the present invention is the vibration detector according to any one of the above [1] to [4], The device further includes a measuring unit having a scale for measuring the displacement of the solid body in the direction of gravity.

[0011] [6] A vibration detector according to one aspect of the present invention is the vibration detector according to any one of the above [1] to [5], The container has a plurality of partition plates arranged in the depth direction inside the container.

[0012] [7] A vibration detector according to one aspect of the present invention is the vibration detector according to any one of the above [1] to [6], the solid is an electrically conductive solid, an electrical contact disposed within the vessel, the electrical contact configured to contact the solids as they settle; a notification unit connected to the solid body and the electrical contacts, which notifies when electrical continuity is established; Further provided are:

[0013] [8] A vibration detector according to one aspect of the present invention includes: A vibration detector that detects vibration of a device, a first container that is at least partially transparent and that contains a substance that exhibits the properties of a colored gel-state non-Newtonian fluid; a second container that is at least partially transparent and that is located below the first container and communicates with the first container via a through hole; a fixing part fixed to the device; Equipped with When the substance changes from a gel state to a sol state due to vibrations propagated from the device, the substance moves from the first container to the second container through the through-holes. [9] A vibration detector according to one aspect of the present invention is the vibration detector according to any one of the above [1] to [8], The substance is a substance that exhibits thixotropy.

[0014]

[10] A vibration detector according to one aspect of the present invention includes: A vibration detector that detects vibration of a device, a transparent container at least partially containing a first substance colored a first color and exhibiting the properties of a non-Newtonian fluid, and a second substance colored a second color different from the first color and exhibiting the properties of a non-Newtonian fluid, sealed in a gel state; a fixing part fixed to the device; Equipped with When the first substance and the second substance change from a gel state to a sol state due to vibrations transmitted from the device, the first substance and the second substance mix and exhibit a third color different from the first color and the second color.

[11] A vibration detector according to one aspect of the present invention is the vibration detector according to

[10] above, The first substance and the second substance are substances that exhibit thixotropy.

[0015]

[12] A vibration detection system according to one aspect of the present invention includes: A vibration detection system including a device having a drive unit and a vibration detector that detects vibration of the device, The vibration detector includes: a transparent container at least partially containing a substance exhibiting non-Newtonian fluid properties; a conductive solid mixed in the substance, the solid remaining suspended and stationary in the substance in a gel state and sinking in the direction of gravity in the substance in a sol state; an electrical contact disposed at a first location within the vessel, the first contact configured to contact the solids as they settle; a fixing portion fixed to the device; Equipped with The device comprises: A first stop portion is provided which is connected to the solid body and the first contact and stops driving the drive portion when electrical conduction occurs.

[0016]

[13] A vibration detection system according to one aspect of the present invention is the vibration detection system according to

[12] above, the vibration detector further includes an electrical contact provided at a second position lower than the first position, the second contact configured to come into contact with the solid when the solid sinks; The device further includes a second stop portion connected to the solid body and the second contact point, for emergency stopping the driving of the driving portion when electrical conduction occurs.

[14] A vibration detector according to one aspect of the present invention is the vibration detector according to the above

[12] or

[13] , The substance is a substance that exhibits thixotropy. [Effects of the Invention]

[0017] According to one aspect of the present invention, the occurrence or non-occurrence of abnormal vibration can be visually recognized. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a diagram showing a schematic configuration of a vibration detection system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram showing an example of a vibration detector according to the first embodiment, illustrating a state before vibration detection. [Figure 3] FIG. 2 is a diagram showing an example of a vibration detector according to the first embodiment, illustrating a state after vibration detection. [Figure 4A]FIG. 10 is a diagram showing an example of the characteristics (relationship between vibration frequency and sedimentation time) for each concentration of a substance T according to the present embodiment. [Figure 4B] FIG. 10 is a diagram showing an example of the characteristics (relationship between vibration frequency and vibration displacement) for each concentration of a substance T according to the present embodiment. [Figure 5] FIG. 10 is a diagram showing an example of amplitude thresholds and frequencies set for the characteristics of a substance T according to the present embodiment. [Figure 6] FIG. 10 is a diagram showing an example of amplitude thresholds and frequencies set for the characteristics of a substance T according to the present embodiment. [Figure 7] FIG. 10 is a diagram illustrating an example of a vibration detector according to a second embodiment. [Figure 8] FIG. 10 is a diagram illustrating an example of a vibration detector according to a third embodiment. [Figure 9] FIG. 10 is a diagram showing an example of a vibration detector according to a fourth embodiment, illustrating a state before vibration detection. [Figure 10] FIG. 10 is a diagram showing an example of a vibration detector according to a fourth embodiment, illustrating a state after vibration detection. [Figure 11] FIG. 10 is a diagram showing an example of a vibration detector according to a fifth embodiment, illustrating a state before vibration detection. [Figure 12] FIG. 10 is a diagram showing an example of a vibration detector according to a fifth embodiment, illustrating a state after vibration detection. [Figure 13] FIG. 10 is a diagram showing a schematic configuration of a vibration detection system according to a sixth embodiment. [Figure 14] FIG. 13 is a diagram illustrating an example of a vibration detector according to a sixth embodiment. [Figure 15] FIG. 13 is a diagram illustrating an example of a vibration detector according to a seventh embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, each embodiment will be described with reference to the drawings. However, unnecessary detailed description may be omitted. For example, detailed description of well-known matters or redundant description of substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. First Embodiment

[0020] (Outline of vibration detection system) 1 is a diagram showing a schematic configuration of a vibration detection system 1 according to this embodiment. As shown in FIG. 1, the vibration detection system 1 according to this embodiment includes a vibration detector 10 and a device 20.

[0021] The vibration detector 10 is a detector that detects vibrations of the equipment 20, and in particular detects abnormal vibrations generated by the equipment 20. The vibration detector 10 is adhesively fixed to the equipment 20, and vibrations generated in the equipment 20 are transmitted to the vibration detector 10.

[0022] The device 20 includes a drive unit (not shown) that is driven periodically. The device 20 is, for example, a rotating device such as a pump, a compressor, or a fan.

[0023] (Vibration detector configuration) FIG. 2 is a diagram showing an example of a schematic configuration of a vibration detector 10 according to this embodiment. As shown in FIG. 2, the vibration detector 10 includes a container 13 having an upper portion (top lid) 11 and a lower portion (bottom lid) 12 that form a sealed space. The container 13 is made of at least a portion of a transparent material, and is configured so that a substance T and a solid S, which will be described later, can be visually recognized from the outside of the container 13. A rear surface 12a of the lower portion 12 of the vibration detector 10 functions as a fixing portion that is adhesively fixed to the surface of the device 20. Methods for adhesive fixation include adhesives and magnets. Since it is sufficient that vibrations from the device 20 are transmitted to the vibration detector 10, the vibration detector 10 may be mechanically fixed with bolts or the like.

[0024] The container 13 is filled with substance T, which exhibits the properties of a non-Newtonian fluid. Here, non-Newtonian fluids refer to fluids whose viscosity changes depending on the applied force, and include Bingham fluids (plastic fluids), pseudoplastic fluids, dilatant fluids, and thixotropic fluids. In the following embodiments, including this embodiment, an example will be described in which substance T exhibits thixotropy, a property of non-Newtonian fluids. Before vibration, substance T is in a highly viscous solid state (gel state). As vibration continues and shear stress is applied, the viscosity gradually decreases and substance T becomes liquid (sol state). Furthermore, when vibration is stopped, the viscosity gradually increases and substance T finally returns to a solid state (gel state). Substance T does not liquefy in response to any type of vibration, but is formulated to be highly responsive to abnormal vibrations of the device 20. The properties of substance T will be described later.

[0025] A solid S is mixed in the substance T sealed in the container 13. This solid S is suspended and stationary in the gel-state substance T (see FIG. 2). The position (height) at which the solid S is stationary is set in advance to be a predetermined position (height). For example, the position of the solid S may be determined based on the position of a scale marked on the measuring unit 14 described below.

[0026] A measuring unit 14 having a scale for measuring the amount of displacement of the solid S in the direction of gravity (height direction of the container 13) is provided on the side of the container 13. By reading the scale on this measuring unit 14, the amount of displacement of the solid S in the direction of gravity can be known. Note that the measuring unit 14 may be provided by providing a scale on the surface of the container 13.

[0027] FIG. 3 is a diagram showing an example of the state of the vibration detector 10 after a predetermined vibration is propagated to the vibration detector 10. When the predetermined vibration is propagated to the vibration detector 10, the substance T in the container 13 changes from a gel state to a sol state in response to the vibration, and the solid S settles in the direction of gravity (downward in the container 13). As described above, at least a portion of the container 13 is transparent, so that the predetermined vibration is propagated to the vibration detector 10 and the state in which the solid S has settled in the container 13 can be visually confirmed. In addition, the amount of displacement caused by the settling of the solid S can be measured by reading the scale attached to the measuring unit 14. This makes it easy to understand the degree of vibration generated in the device 20. After the solid S has settled to the bottom of the container 13, the container 13 can be turned upside down and used again as the vibration detector 10. In this case, it is preferable to use a magnet to adhere and fix the container 13 to the device 20. Specifically, magnets are provided on both the back surface 12a of the lower portion 12 of the container 13 and the surface 11a of the upper portion 11, and after the solid S has settled to the bottom of the container 13, the container 13 is turned upside down, and after the inversion, the container 13 is adhered and fixed to the device 20 by the magnet provided on the surface 11a of the upper portion 11. This makes it possible to easily reuse the vibration detector 10 even after it has detected vibrations. Furthermore, in this embodiment, an example has been described in which the solid S sinks in the direction of gravity within the container 13 when a predetermined vibration is detected by the vibration detector 10, but if the mass of the solid S is small, it may not sink but may instead float up. In such a case, the amount by which the solid S has floated up can be read using the scale attached to the measuring unit 14. In either case, the vibration detector 10 can easily determine the degree of vibration that has occurred in the equipment 20 by reading the amount of displacement of the solid S within the container 13 after vibration has occurred.

[0028] (Properties of substance T) 4A and 4B are diagrams illustrating the characteristics of a thixotropic substance, using substance T as an example. FIG. 4A illustrates the relationship between the vibration frequency (Hz) and the time (s) (settling time) required for solid S to reach the bottom of the container 13, and FIG. 4B illustrates the relationship between the vibration frequency (Hz) and the vibration displacement (μm) for a given vibration duration t (s). The ease (characteristics) of liquefaction of substance T depends on the frequency, displacement, and vibration duration of the applied vibration, but also varies depending on the concentration of the solution containing substance T, as shown in FIGS. 4A and 4B. Therefore, by changing the "frequency," "displacement," and "vibration duration" of the applied vibration for each concentration of the solution containing substance T and recording (creating a database) the time (or settling velocity) required for solid S to reach the bottom of the container 13 from the reference position for each setting, it is possible to determine the optimal concentration of substance T for the desired vibration (abnormal vibration) detected by the vibration detector 10. In addition, if the mass of the solid S is small (light), it may rise rather than sink when vibration occurs (when the substance T is liquefied). In such a case, it is preferable to use the time (or rising speed) for the solid S to reach the top of the container 13 from the reference position instead of the time (or settling speed) for the solid S to reach the lowest part from the reference position of the container 13.

[0029] FIG. 5 shows the liquefaction susceptibility (characteristics) of material T at a certain concentration and vibration duration, illustrating an example of the relationship between vibration frequency and vibration displacement. As shown in FIG. 5, the relationship between vibration frequency and vibration displacement determines the characteristics of material T—either "instant liquefying," "slow liquefying," or "not liquefying." Therefore, by determining the concentration of material T with the "instant liquefying" characteristic from the database, assuming that the target vibration frequency is the drive frequency of the device 20 to be detected and the vibration displacement of the vibration is the amplitude threshold (amplitude of abnormal vibration) specified by JIS or other standards, a vibration detector 10 that is sensitive to abnormal vibrations occurring in the device 20 can be configured. Note that, if the device 20 is a rotating device, the target vibration frequency may be the rotational frequency of the drive unit of the device 20. Alternatively, the target frequency may be the frequency of vibrations occurring when an abnormality occurs at an evaluation point (e.g., a bearing) in accordance with JIS or other standards (e.g., the natural frequency of the evaluation point). This allows the configuration of a vibration detector 10 that is more sensitive to abnormalities in the device 20.

[0030] However, depending on the equipment 20 to be detected, the amplitude may exceed the judgment value (defined by standards such as JIS) for a short period of time during startup or shutdown. The evaluation of whether or not there is an abnormality in the equipment 20 itself needs to be performed at a (normally stable) operating point based on the specifications, but if the vibration detector 10 reacts to short-term vibrations during startup or shutdown, it will falsely detect abnormal vibrations.

[0031] In this case, as shown in Fig. 6, by determining from the database the concentration of substance T that "slowly liquefies" with respect to a preset frequency of vibration to be detected (for example, the drive frequency of device 20) and vibration amplitude (threshold value of amplitude for determining abnormal vibration), it is possible to configure a vibration detector 10 that is robust against vibrations that temporarily occur for a short period of time when device 20 is started or stopped. Even if substance T liquefies in response to a temporarily occurring vibration, the change is slow, and once the vibration subsides, it returns to a gel state and stops liquefying.

[0032] As described above, the vibration detector 10 of this embodiment comprises a transparent container 13 at least partially enclosing a substance T exhibiting non-Newtonian fluid properties (e.g., a substance exhibiting thixotropy), a solid S mixed into the substance T, the solid S remaining stationary in a floating state in the substance T in a gel state, and sinking or floating in the direction of gravity in the substance T in a sol state, and a fixed part 12a fixed to the device 20.

[0033] According to this configuration, it is possible to realize the vibration detector 10 and the vibration detection system 1 including the vibration detector 10, which are capable of visually recognizing whether or not abnormal vibration has occurred in the device 20. <Second embodiment> Next, a vibration detector 10 according to a second embodiment will be described. The same members as those in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

[0034] FIG. 7 is a diagram illustrating an example of a schematic configuration of a vibration detector 10 according to the second embodiment. As shown in FIG. 7, the vibration detector 10 according to the second embodiment includes a container 13 and a plurality of partition plates 15 fixed to the inner wall of the container 13. For example, before the vibration detector 10 detects abnormal vibration (before the substance T liquefies), a solid S (preferably a sphere) is placed on the top partition plate 15. When abnormal vibration occurs in the device 20 and the substance T in the container 13 changes from a gel state to a sol state and liquefies, the solid S sinks downward in the container 13 along the gradient of the partition plates 15. Therefore, the degree of abnormal vibration can be visually recognized based on the final position of the solid S in the container 13 (which partition plate 15 it is on). For example, if it is possible to assume that a single abnormal vibration will cause the solid S to move to a partition plate 15 one level lower (if the duration of the abnormal vibration can be estimated), it is possible to determine the number of times the abnormal vibration has occurred based on the position (number of levels) of the partition plate 15 on which the solid S is located. <Third embodiment> Next, a vibration detector 10 according to a third embodiment will be described. The same members as those in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

[0035] Fig. 8 is a diagram showing an example of a schematic configuration of a vibration detector 10 according to the third embodiment. As shown in Fig. 8, the vibration detector 10 according to the third embodiment includes a conductive solid body S, an electrical contact C at the bottom of a container 13, and an alarm unit 16 connected to the solid body S and the electrical contact C. That is, in the vibration detector 10 according to the third embodiment, the solid body S, the electrical contact C, and the alarm unit 16 form a circuit (alarm circuit).

[0036] When abnormal vibrations occurring in the device 20 are transmitted to the vibration detector 10, the substance T in the container 13 changes from a gel state to a sol state and becomes liquefied. When the solid S sinks and comes into contact with the electrical contact C, a circuit (alarm circuit) consisting of the solid S, the electrical contact C, and the alarm unit 16 becomes conductive. The conduction of the alarm circuit triggers the alarm unit 16 to notify that abnormal vibrations have occurred in the device 20. The alarm unit 16 is, for example, a lamp or a speaker.

[0037] According to the above configuration, since the notification unit 16 that notifies when abnormal vibration occurs is provided, it becomes possible to more easily recognize whether or not abnormal vibration of the device 20 is occurring. <Fourth embodiment> Next, a vibration detector 10 according to a fourth embodiment will be described. The same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0038] FIG. 9 is a diagram illustrating an example of a schematic configuration of a vibration detector 10 according to a fourth embodiment. As illustrated in FIG. 9, the vibration detector 10 according to the fourth embodiment includes an at least partially transparent first container 13a containing a substance T (e.g., a substance exhibiting thixotropy) that exhibits the properties of a colored gel-state non-Newtonian fluid, and an at least partially transparent second container 13b located below the first container 13a in the direction of gravity and communicating with the first container 13a via a through-hole. Specifically, through-holes are formed in the bottom of the first container 13a and in the top of the second container 13b, and the first container 13a and the second container 13b are connected by a pipe 13c connecting the through-holes. An air vent is provided in the top of the second container 13b to allow air in the second container 13b to escape to the outside when the substance T moves from the first container 13a to the second container 13b.

[0039] When abnormal vibrations occurring in the device 20 are transmitted to the vibration detector 10, the substance T in the first container 13a changes from a gel state to a sol state and becomes liquefied. Then, as shown in FIG. 10, the liquefied substance T moves through the pipe 13c to the second container 13b. The amount of substance T moving from the first container 13a to the second container 13b (the amount of substance T accumulating in the second container 13b) is proportional to the degree of abnormal vibration. Therefore, the amount of substance T accumulating in the second container 13b can be used to visually determine whether or not abnormal vibrations are occurring in the device 20, as well as the degree of the abnormal vibrations. Fifth Embodiment Next, a vibration detector 10 according to a fifth embodiment will be described. The same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0040] Fig. 11 is a diagram showing an example of a schematic configuration of a vibration detector 10 according to the fifth embodiment. As shown in Fig. 11, the vibration detector 10 according to the fifth embodiment has a first substance T1 colored a first color (e.g., blue) and exhibiting the properties of a non-Newtonian fluid, and a second substance T2 colored a second color (e.g., yellow) different from the first color, and exhibiting the properties of a non-Newtonian fluid, sealed in a gel state inside a container 13. Here, the first substance T1 and the second substance T2 are, for example, substances exhibiting thixotropy.

[0041] When abnormal vibrations occurring in the device 20 are transmitted to the vibration detector 10, the substances T1 and T2 in the container 13 change from a gel state to a sol state and become liquefied. Then, as shown in FIG. 12, the first substance T1 and the second substance T2 mix and exhibit a third color (e.g., green) different from the first color and the second color. The amount of color development of the third color is proportional to the degree of abnormal vibration. Therefore, the degree of abnormal vibration as well as whether or not abnormal vibrations are occurring in the device 20 can be visually confirmed based on the amount of color development of the third color.

[0042] The container 13 may be provided with a photoelectric sensor (color sensor) for detecting a third color that appears inside the container 13 when abnormal vibration occurs. Sixth Embodiment Next, a description will be given of a vibration detector 10 according to a sixth embodiment and a vibration detection system 1 including the vibration detector 10. The same members as those in the first embodiment are given the same reference numerals, and descriptions thereof will be omitted.

[0043] Fig. 13 is a diagram showing an example of a schematic configuration of a vibration detection system 1 according to the sixth embodiment. As shown in Fig. 13, the vibration detection system 1 according to the sixth embodiment includes a device 20 including a stopping unit 21 for stopping the driving of a driving unit (not shown) when abnormal vibration occurs. The stopping unit 21 is electrically connected to the vibration detector 10.

[0044] Fig. 14 is a diagram showing an example of the configuration of a vibration detector 10 according to the sixth embodiment. As shown in Fig. 14, the vibration detector 10 according to the sixth embodiment includes a conductive solid body S, an electrical contact C at the bottom of a container 13, and a stopping part 21 connected to the solid body S and the electrical contact C. That is, in the vibration detector 10 according to the sixth embodiment, the solid body S, the electrical contact C, and the stopping part 21 form a circuit (stop circuit).

[0045] When abnormal vibrations occurring in the device 20 are transmitted to the vibration detector 10, the substance T in the container 13 changes from a gel state to a sol state and becomes liquefied. When the solid S settles and comes into contact with the electrical contact C, a circuit (stop circuit) consisting of the solid S, the electrical contact C, and the stopping unit 21 becomes conductive. The fact that the stop circuit is conductive triggers the stopping unit 21 to stop driving the driving unit of the device 20.

[0046] According to the above configuration, the device is provided with a stop unit 21 that stops the drive unit from driving when abnormal vibrations occur, so that it is possible to visually check whether or not abnormal vibrations are occurring in the device 20, and safety can be quickly ensured by stopping the drive unit, which is the source of the abnormal vibrations. Seventh Embodiment Next, a vibration detector 10 according to a seventh embodiment and a vibration detection system 1 including the vibration detector 10 will be described. The same components as those in the sixth embodiment are given the same reference numerals and will not be described again. The vibration detection system 1 of the sixth embodiment differs in that the stopping unit 21 has a single-stage stopping function, whereas the vibration detection system 1 of the seventh embodiment has a stopping unit 21 with two-stage stopping functions (normal stop and emergency stop).

[0047] 15 is a diagram illustrating an example of the configuration of a vibration detector 10 according to a seventh embodiment. As illustrated in FIG. 15, the vibration detector 10 according to the seventh embodiment includes a conductive solid S, a first contact C1 that is an electrical contact provided on the inner wall (first position) of the container 13, a second contact C2 that is an electrical contact provided at a second position (e.g., the lowest part of the container 13) lower than the first position, and a stopper 21 connected to the solid S and the electrical contact C. The stopper 21 includes a first stopper 21a that is connected to the solid S and the first contact C1, and a second stopper 21b that is connected to the solid S and the second contact C2. That is, in the vibration detector 10 according to the sixth embodiment, the solid S, the first contact C1, and the first stopper 21a form a first stop circuit, and the solid S, the second contact C2, and the second stopper 21b form a second stop circuit.

[0048] When abnormal vibrations occurring in the device 20 are transmitted to the vibration detector 10, the substance T in the container 13 changes from a gel state to a sol state and becomes liquefied. When the solid S sinks and comes into contact with the first contact C1, the first stopping circuit consisting of the solid S, the first contact C1, and the first stopping unit 21a becomes conductive. The first stopping unit 21 stops driving the driving unit of the device 20 as a trigger.

[0049] Furthermore, when the amplitude of the abnormal vibration is large, the liquefaction of the substance T in the container 13 progresses quickly, and the settling speed of the solid S also increases, causing the solid S to sink to the lowest part of the container 13 in one go and come into contact with the second contact C2. In this case, the second stop circuit consisting of the solid S, the second contact C2, and the second stop part 21b becomes conductive, and the second stop part 21b operates, stopping the drive of the drive part of the device 20.

[0050] In this way, the first stop unit 21a functions as a normal stop unit for stopping the drive unit when abnormal vibration occurs in the equipment 20, and the second stop unit 21b functions as an emergency stop unit for urgently stopping the drive unit when abnormal vibration of a larger amplitude occurs.

[0051] According to the above configuration, since the device is provided with the first stop section 21a that functions as a normal stop section and the second stop section 21b that functions as an emergency stop section, it is possible to quickly respond when an abnormal vibration that requires urgent action occurs.

[0052] As described above, the present invention is not limited to the above-described embodiments, and the components can be modified and embodied in practice without departing from the spirit of the invention. Furthermore, various inventions can be formed by appropriately combining multiple components disclosed in the above-described embodiments. For example, some components may be omitted from all the components shown in the embodiments. Furthermore, components from different embodiments may be appropriately combined. [Explanation of symbols]

[0053] 1. Vibration detection system 10 Vibration detector 11 Upper 12 Lower 12a Fixed part 13 Container 13a 1st container 13b Second container 13c pipe 14 Survey Department 15 Divider 16. Information Department 20 equipment 21 Stop part 21a 1st stop 21b Second stop T substance S solid

Claims

1. A vibration detector that detects vibration of a device, a transparent container at least partially containing a substance exhibiting non-Newtonian fluid properties; a solid mixed in the substance, the solid remaining suspended and stationary in the substance in a gel state, and sinking or floating in the direction of gravity in the substance in a sol state; a fixing portion fixed to the device; A vibration detector comprising:

2. 2. The vibration detector according to claim 1, wherein the concentration of the substance is determined according to the frequency and displacement of the detected vibration and the settling or floating velocity of the solid.

3. The vibration detector according to claim 2 , wherein the frequency is a natural frequency of the device.

4. the device is a rotating device; The vibration detector according to claim 2 , wherein the frequency is a rotation frequency of the rotating device.

5. 2. The vibration detector according to claim 1, further comprising a measuring section having a scale for measuring the amount of displacement of the solid body in the direction of gravity.

6. The vibration detector according to claim 1 , wherein the container has a plurality of partition plates arranged in a depth direction inside the container.

7. the solid is an electrically conductive solid, an electrical contact disposed within the vessel, the electrical contact configured to contact the solids as they settle; a notification unit connected to the solid body and the electrical contacts, which notifies when electrical continuity is established; The vibration detector of claim 1 further comprising:

8. A vibration detector that detects vibration of a device, a first container that is at least partially transparent and that contains a substance that exhibits the properties of a colored gel-state non-Newtonian fluid; a second container that is at least partially transparent and that is located below the first container and communicates with the first container via a through hole; a fixing portion fixed to the device; Equipped with When the substance changes from a gel state to a sol state due to vibrations propagated from the device, the substance moves from the first container to the second container through the through-hole. Vibration detector.

9. 9. The vibration detector according to claim 1, wherein the substance is a substance that exhibits thixotropy.

10. A vibration detector that detects vibration of a device, a transparent container at least partially containing a first substance colored a first color and exhibiting non-Newtonian fluid properties, and a second substance colored a second color different from the first color and exhibiting non-Newtonian fluid properties, sealed in a gel state; a fixing portion fixed to the device; Equipped with When the first substance and the second substance change from a gel state to a sol state due to the vibrations propagated from the device, the first substance and the second substance mix together and exhibit a third color different from the first color and the second color. Vibration detector.

11. The vibration detector according to claim 10 , wherein the first material and the second material are thixotropic materials.

12. A vibration detection system including a device having a drive unit and a vibration detector that detects vibration of the device, The vibration detector includes: a transparent container at least partially containing a substance exhibiting non-Newtonian fluid properties; a conductive solid mixed in the substance, the solid remaining suspended and stationary in the substance in a gel state and sinking in the direction of gravity in the substance in a sol state; an electrical contact disposed at a first location within the vessel, the first contact configured to contact the solids as they settle; a fixing part fixed to the device; Equipped with The device comprises: a first stop portion connected to the solid body and the first contact point, and stopping the driving of the driving portion when the solid body is electrically connected; Vibration detection system.

13. the vibration detector further includes an electrical contact provided at a second position lower than the first position, the second contact being configured to come into contact with the solid when the solid sinks; The device further includes a second stop unit connected to the solid body and the second contact point, and configured to stop driving the drive unit when electrical conduction occurs. The vibration sensing system of claim 12.

14. The vibration detection system according to claim 12 or 13, wherein the substance is a substance that exhibits thixotropy.

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