Vibration detection device and abnormality detection system

Abstract

To provide a vibration detection device that can improve the accuracy of detecting an abnormality in a machine without replacing a primary battery.SOLUTION: A vibration detection device according to the present invention comprises a housing and an acceleration sensor arranged inside the housing, and is installed on a vibration detection target. Photoelectric conversion elements are arranged on the side faces of the housing. The acceleration sensor operates with power supplied directly or indirectly from the photoelectric conversion elements, and the position of the acceleration sensor and the center of gravity of the vibration detection device are at positions equal to or less than the half of the height from an installation bottom face of the housing to a top face of the housing.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vibration detection device and an abnormality detection system.

Background Art

[0002] In order to detect abnormalities such as the operating state and failures of machines installed in factories or buildings, for example, sensors such as acceleration sensors or temperature sensors are used to acquire in real time data closely related to the state of the machine, such as vibration or temperature, and monitor the changes. A vibration detection device is used.

[0003] As a vibration detection device for detecting such machine abnormalities using sensors, for example, a vibration sensor, a temperature sensor, a microcontroller, a real-time clock, a battery, etc. are housed in an enclosure, and the vibration sensor and the temperature sensor are used to acquire the vibration data and temperature data of the machine to monitor the vibration and temperature. A sensor device for monitoring a machine is disclosed (see, for example, Patent Document 1).

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, when a solar cell is used as an independent power source separately from a primary battery in a conventional vibration detection device such as the sensor device of Patent Document 1, if the solar cell is installed on the housing of the vibration detection device, resonance is likely to occur in the vibration detection device, and thus the noise detected by the acceleration sensor provided in the vibration detection device is likely to increase. When the noise detected by the acceleration sensor increases, it becomes difficult for the vibration detection device to appropriately detect the abnormality of the vibration of the machine, and there is a problem that the detection accuracy of the abnormality of the machine decreases.

[0005] An aspect of the present invention aims to provide a vibration detection device capable of improving the detection accuracy of machine abnormalities without replacing the primary battery.

Means for Solving the Problems

[0006] One aspect of the present invention is a vibration detection device including a housing and an acceleration sensor disposed within the housing, the vibration detection device being installed on an object to be vibration-detected, wherein a photoelectric conversion element is disposed on a side surface of the housing, the acceleration sensor operates with electric power directly or indirectly supplied from the photoelectric conversion element, and a position of the acceleration sensor and a center of gravity of the vibration detection device are at positions not more than half of a height from an installation bottom surface of the housing to an upper surface of the housing.

Effect of the Invention

[0007] The vibration detection device according to one aspect of the present invention can improve detection accuracy of abnormalities of a machine without replacing a primary battery.

Brief Description of the Drawings

[0008]

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Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described in detail. In order to facilitate understanding of the description, the same reference numerals are given to the same components in each drawing, and redundant descriptions are omitted. In addition, the scales of the respective members in the drawings may be different from the actual ones. In this specification, "~" indicating a numerical range means including the numerical values described before and after it as a lower limit value and an upper limit value unless otherwise specified.

[0010] <Vibration Detection Device> The vibration detection device according to an embodiment of the present invention will be described. FIG. 1 is a perspective view showing an example of the appearance of the vibration detection device according to the present embodiment. FIG. 2A is a cross-sectional view taken along the line I-I of FIG. 1, FIG. 2B is a cross-sectional perspective view taken along the line I-I of FIG. 1, and FIG. 2C is a cross-sectional perspective view taken along the line II-II of FIG. 1. FIGS. 3A to 3F are six views of the vibration detection device shown in FIG. 1. Note that FIGS. 3A to 3F are a plan view, a front view, a left side view, a right side view, a rear view, and a bottom view of the vibration detection device shown in FIG. 1, respectively.

[0011] As shown in FIG. 1, the vibration detection device 1 includes a housing 10, a photoelectric conversion element 20, a magnet 30, and a switch 40. As shown in FIGS. 2A to 2C, inside the housing 10, the vibration detection device 1 has a printed circuit board 50, an FPC cable 60, a sensor 70, a communication interface (communication I / F 80), and a power storage member 90. The vibration detection device 1 fixes the housing 10 with the magnet 30 in a state where the housing 10 is installed on the vibration detection target 2, and detects the vibration of the vibration detection target 2.

[0012] In FIGS. 1, 2A to 2C, and 3A to 3F, a three-dimensional orthogonal coordinate system in three axial directions (X-axis direction, Y-axis direction, Z-axis direction) is used. The width direction of the vibration detection device 1 is defined as the X-axis direction, the depth direction is defined as the Y-axis direction, and the height direction (vertical direction) is defined as the Z-axis direction. In the figures, the direction different from the vibration detection target 2 side of the vibration detection device 1 is defined as the +Z-axis direction, and the direction of the vibration detection target 2 side is defined as the -Z-axis direction. In the following description, the +Z-axis direction may be referred to as up, and the -Z-axis direction may be referred to as down, but this does not represent a universal up and down relationship.

[0013] In this specification, the vibration detection target 2 refers to machinery installed in facilities such as factories or buildings. The machinery is not particularly limited as long as it is a device or equipment that generates vibration. Examples of the machinery include a motor, a pump, a press machine, and the like.

[0014] Also, in FIG. 1, the vibration detection device 1 fixes the housing 10 to the vibration detection target 2 via the magnet 30. However, when the magnet 30 is not required, the vibration detection device 1 may be installed in direct contact with the vibration detection target 2 without the magnet 30.

[0015] As shown in FIGS. 1, 2A to 2C, the housing 10 includes a bottomed cylindrical body (housing main body) 11 and an installation bottom surface (base) 12. The housing 10 is formed in a substantially rectangular parallelepiped shape and has an outer shape that is vertically long when viewed from the front. Note that the housing 10 may have an outer shape that is cylindrical or has a polygonal cross-section.

[0016] In this specification, "vertically long" means that the outer shape of the housing 10 in a front view is longer in the height direction (Z-axis direction) than the lengths in the width direction (X-axis direction), depth direction (Y-axis direction), and the diagonal length in a plan view.

[0017] The bottomed cylindrical body 11 has an upper surface 111 and four side surfaces 112. The bottomed cylindrical body 11 has a bottomed cylindrical outer shape with a rectangular cross-section, and the lower part of the side surface 112 protrudes from the upper surface 111 in a plan view. Note that the bottomed cylindrical body 11 may have a bottomed cylindrical shape or a bottomed cylindrical shape with a polygonal cross-section.

[0018] The bottomed cylindrical body 11 may be formed of, for example, resin or metal, which is generally used for forming the housing.

[0019] The bottomed cylindrical body 11 has a fixing portion 112A at the lower portion 112a of the side surface 112, which is fixed to the installation bottom surface 12 by bolts V11. The fixing portion 112A may be provided at the lower portion 112a of a pair of side surfaces 112 facing each other in the depth direction (Y-axis direction). Note that the bottomed cylindrical body 11 and the installation bottom surface 12 may be connected by fastening members other than bolts V11, or may be connected by an adhesive or the like. Also, the bottomed cylindrical body 11 and the installation bottom surface 12 may be integrally formed. The fixing portion 112A may be provided at the lower portion 112a of a pair of side surfaces 112 facing each other in the width direction (X-axis direction) of the housing 10.

[0020] As shown in FIG. 3A, the upper surface 111 has an outer shape formed in a substantially rectangular shape and has rounded corners. The lengths in the width direction (X-axis direction) and the depth direction (Y-axis direction) of the upper surface 111 may be substantially the same or different.

[0021] The upper surface 111 has a hole portion 111a and a hole portion 111b. The hole portion 111a is formed so that the switch 40 can be exposed to the outside from inside the housing 10. The hole portion 111b is located directly above the illuminance sensor 73 installed inside the housing 10 and is formed to such a size that external light can enter the illuminance sensor 73.

[0022] As shown in FIGS. 3B to 3E, the side surface 112 may have an area larger than the area of the installation bottom surface 12 and / or a height greater than the maximum diameter of the installation bottom surface 12, and may have a vertically long outer shape.

[0023] Note that the maximum diameter of the installation bottom surface 12 refers to the maximum length among the width direction (X-axis direction), the depth direction (Y-axis direction), and the diagonal line in a plan view of the installation bottom surface 12. When the installation bottom surface 12 has a substantially circular shape in a plan view, the maximum diameter of the installation bottom surface 12 is the diameter of the installation bottom surface 12. When there are a plurality of side surfaces 112 of the housing 10, it is sufficient that one side surface 112 has an area larger than the area of the installation bottom surface 12, rather than the total area of the side surfaces 112.

[0024] As shown in FIG. 3A, the side surface 112 may have rounded corners in a plan view.

[0025] As shown in FIG. 1, the side surface 112 includes the photoelectric conversion element 20 at at least a part thereof. That is, the photoelectric conversion element 20 is disposed at at least a part of the side surface 112.

[0026] Note that "the photoelectric conversion element 20 is disposed" means that the photoelectric conversion element 20 constitutes at least a part of the side surface 112, including the case where the photoelectric conversion element 20 constitutes the entire side surface 112 and the case where the photoelectric conversion element 20 constitutes a part of the side surface 112.

[0027] The side surface 112 has a recess 1121 in which the photoelectric conversion element 20 is disposed, and the photoelectric conversion element 20 is housed in the recess 1121. The recess 1121 has a flat portion 1121a on which the photoelectric conversion element 20 is installed. The inner peripheral surface of the recess 1121 and the surface of the flat portion 1121a function as a positioning portion when the photoelectric conversion element 20 is attached. The recess 1121 may have a hole portion 1121b at a substantially central portion of the flat portion 1121a. The hole portion 1121b allows heat to escape from the surface of the photoelectric conversion element 20 facing the flat portion 1121a into the interior of the housing when the photoelectric conversion element 20 generates heat.

[0028] The side surface 112 may have a notch 1121A on the upper surface of the concave portion 1121. A hole 112B is formed in the side surface 112 by the notch 1121A and the notch 22. The connecting portion 21 of the photoelectric conversion element 20 is installed in the hole 112B.

[0029] As shown in FIG. 2A, the installation bottom surface 12 is provided inside the lower portion 112a of the side surface 112 and at a position facing the vibration detection target 2. As shown in FIG. 3F, the installation bottom surface 12 has an outer shape formed in a substantially rectangular shape in plan view and has rounded corners.

[0030] As shown in FIGS. 2A and 2C, the installation bottom surface 12 is a plate-like member having a rectangular shape. The installation bottom surface 12 is provided inside the lower portion 112a of the side surface 112, is provided so as to block the space inside the housing 10, and has a reference plane B facing the vibration detection target 2 when the vibration detection device 1 is installed on the vibration detection target 2.

[0031] As described above, the installation bottom surface 12 is fixed to the fixing portion 112A by bolts V11 in the lower portion 112a of the side surface 112.

[0032] As shown in FIGS. 2B and 2C, the installation bottom surface 12 has a plurality (four in FIG. 2C) of supports 14 on its upper surface.

[0033] The installation bottom surface 12 may be configured using a hard and heavy material like a rigid body. The installation bottom surface 12 may be formed of, for example, a metal such as stainless steel. By forming the installation bottom surface 12 as a rigid body, it is possible to suppress the absorption of vibration of the vibration detection target 2 or the generation of resonance, so that a decrease in the accuracy of the acceleration measured by the acceleration sensor 71 of the sensor 70 is suppressed. Also, even if the bottomed cylindrical body 11 is installed on the installation bottom surface 12, deformation of the installation bottom surface 12 can be suppressed.

[0034] When the installation bottom surface 12 is composed of a magnetic material and can function as a magnet, the vibration detection device 1 may not include the magnet 30 and may be directly contacted with the vibration detection target 2 by the installation bottom surface 12 of the housing 10 and fixed to the vibration detection target 2.

[0035] As shown in FIG. 1, the photoelectric conversion element 20 is provided so as to constitute at least a part of the housing 10. The photoelectric conversion element 20 may be provided so as to constitute at least a part of the upper surface 111 and the four side surfaces 112 of the housing 10. A switch 40 or the like is provided on the upper surface 111 of the housing 10, and the area where the photoelectric conversion element 20 can be arranged is limited. However, it is easier to secure a wider area where the photoelectric conversion element 20 can be arranged on the side surface 112 than on the upper surface 111. Therefore, the photoelectric conversion element 20 is preferably provided so as to constitute a part of any one or more of the four side surfaces 112. As shown in FIGS. 1 and 3B to 3D, the photoelectric conversion element 20 may be arranged so as to constitute a part of the three side surfaces 112 located on the front side, the left side surface side, and the right side surface side of the vibration detection device 1 among the four side surfaces 112.

[0036] The photoelectric conversion element 20 is not particularly limited as long as it can generate electricity with sunlight or a fluorescent lamp. For example, a solar cell panel including one or more solar cells, a photodiode, or the like is used. When the photoelectric conversion element 20 is a solar cell panel, the solar cell panel may be composed of one solar cell, or may be provided with a plurality of solar cells arranged in series or in parallel.

[0037] The photoelectric conversion element 20 is fixed to the side surface 112 of the housing 10. As the fixing method of the photoelectric conversion element 20 to the side surface 112, a generally used fixing method can be used. For example, an adhesive or the like is applied to the outer periphery or the back surface of the photoelectric conversion element 20 and adhered and fixed to the flat portion 1121a provided in the concave portion 1121 of the side surface 112. In addition to the function of adhering the photoelectric conversion element 20 to the side surface 112, the adhesive can function as a vibration damping material that suppresses the transmission of the vibration of the vibration detection target 2 to the photoelectric conversion element 20. By providing the photoelectric conversion element 20 on the side surface 112 via an adhesive, it is possible to prevent the photoelectric conversion element 20 from being damaged due to vibration.

[0038] Alternatively, the photoelectric conversion element 20 may be fixed, for example, with an adhesive sealing member 1122 (see FIGS. 4A to 4C). In this case, a part of the photoelectric conversion element 20 may have a thickness so that it can be in contact with the sealing member 1122. As shown in FIGS. 4A and 4B, the sealing member 1122 has a first region 1122a that covers the periphery of the photoelectric conversion element 20 and a second region 1122b that faces the photoelectric conversion element 20.

[0039] The outer surface of the first region 1122a may be the same color as the outer surface of the housing 10, and the back surface may be composed of an adhesive member.

[0040] The second region 1122b is transparent and may be composed of a transparent member that transmits light. Note that "transparent" means that the light transmittance of visible light (wavelength 380 to 780 nm) is not substantially 0, and the light transmittance is 40% or more in the visible light wavelength range of 380 to 780 nm, preferably 80% or more, more preferably 90% or more. The light transmittance is measured using "Plastics - Method for Determining Total Light Transmittance and Total Light Reflectance" specified in JIS K 7375:2008.

[0041] In the vibration detection device 1 shown in FIGS. 4A to 4C, the photoelectric conversion element 20 is installed in the recess 1121, and the photoelectric conversion element 20 can be fixed to the housing 10 by attaching the sealing member 1122 from above the photoelectric conversion element 20. In this case, the depth of the recess 1121 on the side surface 112 is preferably approximately the same as or greater than the thickness of the photoelectric conversion element 20. By making the depth of the recess 1121 on the side surface 112 approximately the same as or greater than the thickness of the photoelectric conversion element 20, the adhesive strength between the photoelectric conversion element 20 and the side surface 112 can be maintained high. Also, since the photoelectric conversion element 20 can be prevented from protruding from the side surface 112, chipping or cracking at the end of the photoelectric conversion element 20 can be prevented, and the original designed durability life of the photoelectric conversion element 20 can be ensured. Furthermore, since the first region 1122a of the sealing member 1122 covers the connecting portion 21, the photoelectric conversion element 20 can be prevented from being impacted from the outside.

[0042] As shown in FIGS. 1 and 2A, the photoelectric conversion element 20 has a connecting portion 21 at its upper part. The connecting portion 21 is electrically connected to a printed circuit board 50-2 installed inside the housing 10 by a wiring L1. The electricity generated in the photoelectric conversion element 20 is sent from the photoelectric conversion element 20 through the connecting portion 21, through the wiring L1 and the printed circuit board 50-2, to the power storage member 90, and is used for charging the power storage member 90 and the like.

[0043] The photoelectric conversion element 20 may have a notch 22 at its upper part so as to face a notch 1121A provided on the upper surface of the recess 1121 of the side surface 112. A hole 112B is formed in the side surface 112 by the notch 1121A and the notch 22.

[0044] As shown in FIGS. 1 and 3F, the magnet 30 is provided at the bottom of the installation bottom surface 12 and contacts the vibration detection target 2. The magnet 30 is formed in a substantially rectangular parallelepiped shape and may have rounded corners. Note that the magnet 30 may be formed to have a planar shape such as a polygon other than a circle, an ellipse, or a quadrilateral.

[0045] A pair of magnets 30 may be provided so as to face both ends in the Y-axis direction at the bottom of the installation bottom surface 12. The pair of magnets 30 are installed at the bottom of the installation bottom surface 12 so as to be substantially parallel along the major axis direction of the magnet 30.

[0046] The magnet 30 may be formed using a generally used magnetic material.

[0047] The switch 40 is used for controlling the operation of the vibration detection device 1. As shown in FIGS. 1 and 2A, the switch 40 is provided so as to be exposed to the outside of the housing 10 from the hole 111a of the upper surface 111, and the switch 40 is electrically connected to the printed circuit board 50-2 inside the housing 10.

[0048] As shown in FIGS. 2A to 2C, the printed circuit board 50 is provided inside the housing 10 and is a board with an electric circuit or the like provided on its surface. The printed circuit board 50 has printed circuit boards 50-1 and 50-2, and the printed circuit board 50-1 and the printed circuit board 50-2 are electrically connected by an FPC cable 60.

[0049] As shown in FIG. 2C, the printed circuit board 50-1 is provided on the installation bottom surface 12 side inside the housing 10. The printed circuit board 50-1 is installed on the support 14 of the installation bottom surface 12. The printed circuit board 50-1 may be provided with through holes on its surface, and the bolts V12 may be passed through the through holes and fixed on the support 14. By fixing the printed circuit board 50-1 on the support 14 with the bolts V12, it is possible to suppress fluctuations in the vibration of the vibration detection target 2 before it is detected by the acceleration sensor 71 of the sensor 70, and the vibration can be accurately transmitted to the acceleration sensor 71. Therefore, it becomes easier to maintain the accuracy of the vibration detected by the acceleration sensor 71.

[0050] The printed circuit board 50-1 is electrically connected to an acceleration sensor 71, a temperature and humidity sensor 72, a communication I / F 80, etc. on its upper surface.

[0051] The printed circuit board 50-1 may be arranged in a state of being spatially separated from the side surface 112 of the housing 10 without contacting the side surface 112. By arranging the printed circuit board 50-1 in a state of being spatially separated from the side surface 112, there is a gap between the photoelectric conversion element 20 and the printed circuit board 50-1. Therefore, the photoelectric conversion element 20 is provided on the side surface 112 in a state of being spatially separated from the printed circuit board 50-1. As a result, it is possible to suppress the vibration generated by the photoelectric conversion element 20 from being transmitted to the printed circuit board 50-1, and to suppress the acceleration sensor 71 installed on the printed circuit board 50-1 from being affected by the seismic intensity.

[0052] The printed circuit board 50-1 is preferably positioned below the center of gravity C (see Fig. 2A) of the vibration detection device 1. In this case, since the acceleration sensor 71 installed on the printed circuit board 50-1 can also be arranged to be positioned below the center of gravity C (see Fig. 2A) of the vibration detection device 1, a decrease in the vibration detection performance of the acceleration sensor 71 can be suppressed.

[0053] As shown in Fig. 2A, the printed circuit board 50-2 is provided so as to be positioned on the upper surface 111 side inside the housing 10 and is arranged in a spatially separated state from the photoelectric conversion element 20. The printed circuit board 50-2 may be provided with through holes on its surface, and the bolt V13 may be passed through the through holes and fixed to the inner surface side of the upper surface 111. The printed circuit board 50-2 is provided with an illuminance sensor 73 electrically connectable on its upper surface and is provided with a power storage member 90 etc. electrically connectable on the lower surface of the printed circuit board 50-2. Also, the printed circuit board 50-2 is electrically connected to the photoelectric conversion element 20 via the wiring L1 and is electrically connected to the communication I / F 80 via the FPC cable 60.

[0054] As shown in Figs. 2A to 2C, the FPC cable 60 is a wiring for connecting the printed circuit board 50-1 and the printed circuit board 50-2 inside the housing 10.

[0055] As shown in Figs. 2A to 2C, the sensor 70 is provided on the printed circuit board 50 inside the housing 10. The sensor 70 has an acceleration sensor 71, a temperature and humidity sensor 72, and an illuminance sensor 73, and operates with the power supplied from the power storage member 90 or the photoelectric conversion element 20 and operates with the power supplied directly or indirectly from the photoelectric conversion element 20.

[0056] As shown in Fig. 2C, the acceleration sensor 71 and the temperature and humidity sensor 72 are provided on the printed circuit board 50-1. As shown in Figs. 2A and 2B, the illuminance sensor 73 is provided on the printed circuit board 50-2. As the acceleration sensor 71, the temperature and humidity sensor 72, and the illuminance sensor 73, generally used acceleration sensors, temperature sensors, illuminance sensors, etc. can all be used.

[0057] The acceleration sensor 71 is preferably provided on the printed circuit board 50-1 so as to be positioned at half or less of the installation height of the photoelectric conversion element 20. In this case, the acceleration sensor 71 is provided on the printed circuit board 50-1 so as to be positioned below the center of gravity C (see FIG. 2A) of the vibration detection device 1. When the acceleration sensor 71 is provided on the printed circuit board 50-2, for example, since the acceleration sensor 71 is positioned above the center of gravity C (see FIG. 2A) of the vibration detection device 1, the vibration of the vibration detection target 2 fluctuates before reaching the acceleration sensor 71, and the magnitude of the vibration cannot be accurately detected, which may have an adverse effect on the vibration detection accuracy. On the other hand, if the acceleration sensor 71 is provided on the printed circuit board 50-1 so as to be positioned below the center of gravity C (see FIG. 2A) of the vibration detection device 1, it is possible to suppress the fluctuation of the vibration of the vibration detection target 2 before reaching the acceleration sensor 71, so that the deterioration of the detection performance of the acceleration sensor 71 can be suppressed.

[0058] As shown in FIG. 2C, the communication I / F 80 is provided on the printed circuit board 50-1 inside the housing 10. As the communication I / F 80, a general communication interface may be used. The communication I / F 80 transmits the detection result of the sensor 70 to the outside. The communication I / F 80 can transmit, for example, the vibration data detected by the acceleration sensor 71 to the outside.

[0059] As shown in FIG. 2A, the power storage member 90 is provided on the lower surface side of the printed circuit board 50-2 inside the housing 10 and is connected so as to be able to supply power to the photoelectric conversion element 20 and the sensor 70, etc., which constitute the vibration detection device 1. The power storage member 90 may be suspended from above downward in the housing 10 by the printed circuit board 50-2. The power storage member 90 may be provided so as to be disposed substantially at the center in the left-right width direction in the front view of the housing 10 and substantially at the center in the top view of the housing 10 as shown in FIG. 3A. The lower end of the power storage member 90 is separated (forms a space) from the sensor 70 and the printed circuit board 50-1.

[0060] The power storage member 90 is a storage battery that can be repeatedly charged and discharged. As the power storage member 90, for example, a general storage battery such as a secondary battery is used.

[0061] As shown in FIG. 2A, in the vibration detection device 1, each member constituting the vibration detection device 1 such as the housing 10, the photoelectric conversion element 20, the printed circuit board 50, the sensor 70, and the power storage member 90 is configured so that the center of gravity C of the vibration detection device 1 is at a position equal to or less than half of the height from the installation bottom surface 12 of the housing 10 to the upper surface 111 of the housing 10. That is, the vibration detection device 1 is configured to satisfy the following formula (I). xg < 1 / 2 × x ···(I) (In formula (I), xg is the distance between the position of the center of gravity C of the vibration detection device 1 and the reference plane B of the vibration detection device 1, and x is the length from the reference plane B to the end of the vibration detection device 1 that is the farthest.)

[0062] In formula (I), x is the total length in the height direction (Z-axis direction) of the vibration detection device 1. The reference plane B may be the lower surface (opposing surface) of the installation bottom surface 12 that faces the vibration detection target 2.

[0063] Also, in the vibration detection device 1, since the center of gravity C of the vibration detection device 1 is located at a position equal to or less than half of the height from the installation bottom surface 12 of the housing 10 to the upper surface 111 of the housing 10, the center of gravity C of the vibration detection device 1 can be at a position equal to or less than half of the installation height of the photoelectric conversion element 20.

[0064] The vibration detection device 1 includes the housing 10 and the photoelectric conversion element 20, and by making the housing 10 have a vertically long outer shape in a front view, the center of gravity C of the vibration detection device 1 is set at a position equal to or less than half of the height from the installation bottom surface 12 of the housing 10 to the upper surface 111 of the housing 10. That is, as shown in FIG. 2A, the center of gravity C of the vibration detection device 1 is located at a position equal to or less than half of the height direction of the photoelectric conversion element 20. Since the vibration detection device 1 can lower the center of gravity C of the vibration detection device 1 to a position equal to or less than half of the height from the installation bottom surface 12 of the housing 10 to the upper surface 111 of the housing 10 to form a stable structure, the occurrence of resonance can be suppressed and the increase in noise can be suppressed.

[0065] Further, by lowering the position of the acceleration sensor 71 to a position below half of the height of the housing 10, the vibration detection device 1 can suppress a decrease in the vibration detection performance of the acceleration sensor 71, so that vibration can be detected with high precision.

[0066] Furthermore, the vibration detection device 1 is configured such that the side surface 112 of the housing 10 includes the photoelectric conversion element 20, so that the photoelectric conversion element 20 can stably supply power to the power storage member 90, and thus the replacement of the power storage member 90 becomes unnecessary. Therefore, the sensor 70 such as the acceleration sensor 71 can stably receive power supply, so that the detection of the abnormality of the vibration detection target 2 can be continuously performed, and the confirmation and adjustment of the sensor 70 associated with the replacement of the power storage member 90 become unnecessary. In a conventional vibration detection device, generally, it is driven only by a primary battery such as a secondary battery. Therefore, when the position of the sensor, particularly the acceleration sensor, is displaced during the replacement of the primary battery, the level of each sensor changes, and thus the level of each sensor changes due to the replacement of the primary battery, and the detection accuracy may decrease. Since the vibration detection device 1 is provided with the photoelectric conversion element 20 and can stably supply power to the power storage member 90, the replacement of the power storage member 90 becomes unnecessary, and it is not necessary to adjust the sensor 70 such as the acceleration sensor 71. Therefore, the vibration detection device 1 can be used without replacing the power storage member 90 and without adjusting the sensor 70.

[0067] Therefore, the vibration detection device 1 can improve the detection accuracy of the abnormality of the vibration detection target 2 without replacing the power storage member 90.

[0068] Also, in the vibration detection device 1, as shown in FIG. 2A, the power storage member 90 can be arranged substantially at the center in the left - right width direction in the front view of the housing 10 and substantially at the center in the top view of the housing 10 (see FIG. 3A). Therefore, the vibration detection device 1 can suppress the occurrence of resonance and the increase of noise. The power storage member 90 preferably has a capacity of a necessary and sufficient size in order to suppress the occurrence of resonance. By using the photoelectric conversion element 20 and the power storage member 90 in combination, the vibration detection device 1 can reduce the capacity of the power storage member 90, so that it can have high measurement accuracy.

[0069] In the vibration detection device 1, it is preferable that the side surface 112 of the housing 10 has at least one of an area larger than the area of the installation bottom surface 12 and a height greater than or equal to the maximum diameter of the installation bottom surface 12. Thereby, the vibration detection device 1 can increase the area of the side surface 112 of the housing 10 in the front view and decrease the area of the installation bottom surface 12 of the housing 10 in the plan view by making the housing 10 have a vertically - long outer shape in the front view. For this reason, the vibration detection device 1 can increase the installation area of the photoelectric conversion element 20 and suppress the increase in the installation area of the vibration detection device 1 on the vibration detection target 2. Thereby, the vibration detection device 1 can suppress the increase in the installation area with the vibration detection target 2 while ensuring a wide power generation area of the photoelectric conversion element 20. Also, by making the housing 10 have a vertically - long outer shape in the front view, the vibration detection device 1 can lower the center of gravity C of the vibration detection device 1 to a position below half of the height from the installation bottom surface of the housing 10 to the upper surface 111 of the housing 10, making it easy to have a stable structure.

[0070] When using a solar cell as an independent power source separate from a primary battery in a conventional vibration detection device like the sensor device of Patent Document 1, in order to ensure power generation by the solar cell as much as possible, the housing of the vibration detection device needs to have as large an installation area for the solar cell as possible. On the other hand, if the housing is enlarged to increase the installation area of the solar cell, the vibration detection device also becomes larger accordingly, and since the installation area of the vibration detection device on the machine increases, depending on the size of the machine, it becomes difficult to apply the vibration detection device. In order to enable the vibration detection device to be used for monitoring machines of various sizes, it is desirable to minimize the installation area of the vibration detection device. Therefore, in order to minimize the installation area of the vibration detection device while ensuring as large an installation area for the solar cell as possible in the housing, it is conceivable that the shape of the housing is vertically long. However, if the shape of the housing is vertically long, resonance is likely to occur in the vibration detection device, so the noise detected by the acceleration sensor provided in the vibration detection device is likely to increase. When the noise detected by the acceleration sensor increases, it becomes difficult for the vibration detection device to appropriately detect an abnormality in the vibration of the machine, and there is a possibility that the detection accuracy of the abnormality of the machine decreases. The vibration detection device 1 can have a vertically long outer shape when viewed from the front, and by lowering the position of the center of gravity C of the vibration detection device 1 and the position of the acceleration sensor 71 to a position below half of the height from the installation bottom surface 12 of the housing 10 to the upper surface 111 of the housing 10, a stable structure can be obtained and the occurrence of resonance can be suppressed. For this reason, the vibration detection device 1 can suppress a decrease in the vibration detection performance of the acceleration sensor 71 and can detect vibrations with high accuracy.

[0071] The vibration detection device 1 preferably satisfies the following formula (1). In the following formula (1), “(mc×xc) / (mg×xg)” represents the moment of the battery with respect to the total moment. When “(mc×xc) / (mg×xg)” is less than 0.25, it can be determined that the vibration detection device has a stable structure and resonance does not occur. Therefore, when the following formula (1) is satisfied, the vibration detection device 1 can be arranged so that its center of gravity C is at a position below half of the height from the installation bottom surface 12 of the housing 10 to the upper surface 111 of the housing 10. (mc×xc) / (mg×xg)<0.25 ···(1) (In formula (1), mc is the mass of the power storage member 90, xc is the distance between the reference plane B of the vibration detection device 1 and the power storage member 90, and mg is the total mass of the vibration detection device 1.)

[0072] The distance from the power storage member 90 in formula (1) may be the center of gravity of the power storage member 90 or the middle of the thickness of the power storage member 90.

[0073] In the vibration detection device 1, it is preferable that the printed circuit board 50-1 is located below the position of the center of gravity C of the vibration detection device 1. Thereby, the printed circuit board 50-1 can be more surely arranged in the housing 10 so that the center of gravity C of the vibration detection device 1 is at a position not more than half of the height from the installation bottom surface 12 of the housing 10 to the upper surface 111 of the housing 10. Since the acceleration sensor 71 is installed on the printed circuit board 50-1, the vibration detection device 1 can be more surely arranged so that the acceleration sensor 71 is also located below the position of the center of gravity C of the vibration detection device 1.

[0074] FIG. 5 is a diagram showing the hardware configuration of the vibration detection device 1. As shown in FIG. 5, the vibration detection device 1 includes a CPU 101, a ROM 102, a RAM 103, a communication I / F 80, an acceleration sensor 71, a temperature and humidity sensor 72, an illuminance sensor 73, and a photoelectric conversion element 20. The vibration detection device 1 outputs a detection result based on detection data input from a sensor 70 such as the acceleration sensor 71. For example, the CPU 101 cooperates with the RAM 103 to execute a program stored in the ROM 102, and the detection result is transmitted to the outside through the communication I / F 80.

[0075] As described above, the vibration detection device 1 can improve the detection accuracy of abnormalities of the vibration detection target 2 without replacing the power storage member 90. Therefore, it can be effectively used as a vibration sensor for detecting the vibration of the vibration detection target 2 having a machine or the like.

[0076] <Abnormality Detection System> FIG. 6 is a diagram showing the whole of the abnormality detection system. As shown in FIG. 6, the abnormality detection system 100 includes a vibration detection device 1 and an information processing system 200.

[0077] The vibration detection device 1 is attached to a vibration detection target 2 placed in a facility such as a factory. The vibration detection device 1 is communicably connected to the information processing system 200 via the gateway GW. The vibration detection device 1 transmits information regarding the operation of the vibration detection target 2 (for example, the vibration of the vibration detection target 2) as detection data to the information processing system 200 via the network.

[0078] The information processing system 200 has one or more information processing devices.

[0079] The information processing device may be any device capable of information processing, and examples of the information processing device include a server, an information processing terminal, and the like.

[0080] The information processing system 200 has a first information processing device 300 and a second information processing device 400. Here, a case where the first information processing device 300 is a server and the second information processing device 400 is an information processing terminal will be described.

[0081] The information processing system 200 has the first information processing device 300 and the second information processing device 400, and receives, as detection data, information regarding the operation of the vibration detection target 2 transmitted from the vibration detection device 1 by the first information processing device 300. Note that the information processing system 200 may receive the detection data first by the second information processing device 400.

[0082] The first information processing device 300 stores the detection data received from the vibration detection device 1. Further, the first information processing device 300 analyzes the operation of the machine by performing information processing on the detection data.

[0083] The second information processing device 400 communicates with the first information processing device 300 via the network. The second information processing device 400 receives various data from the first information processing device 300.

[0084] FIG. 7 is a diagram showing the hardware configuration of the first information processing apparatus 300. As shown in FIG. 7, the first information processing apparatus 300 includes a CPU 301, a ROM 302, a RAM 303, an HDD / SDD 304, and a communication I / F 305. Since the CPU 301, the ROM 302, the RAM 303, and the communication I / F 305 are the same as the CPU 101, the ROM 102, the RAM 103, and the communication I / F 80 of the vibration detection device 1 shown in FIG. 5, the details are omitted.

[0085] FIG. 8 is a diagram showing the hardware configuration of the second information processing apparatus 400. As shown in FIG. 8, the second information processing apparatus 400 includes a CPU 401, a ROM 402, a RAM 403, an HDD / SSD 404, a communication I / F 405, and a display unit 406. Since the CPU 401, the ROM 402, the RAM 403, and the communication I / F 405 are the same as the CPU 101, the ROM 102, the RAM 103, and the communication I / F 80 of the vibration detection device 1 shown in FIG. 6, the details are omitted. Since the HDD / SSD 404 is the same as the HDD / SDD 304 shown in FIG. 7, the details are omitted.

[0086] Examples of the display unit 406 include a monitor.

[0087] FIG. 9 is a functional block diagram of the abnormality detection system 100. As shown in FIG. 9, in the abnormality detection system 100, the vibration detection device 1 includes a detection unit 110 and a first transmission unit 120.

[0088] The first information processing apparatus 300 includes a first reception unit 310, an abnormality determination unit 320, a DB 330, a first transmission / reception unit 340, and a screen information management unit 350.

[0089] The second information processing apparatus 400 includes a second transmission / reception unit 410, a display control unit 420, and an operation reception unit 430.

[0090] The detection unit 110 is realized by a sensor 70 including an acceleration sensor 71, an illuminance sensor 73, and a temperature and humidity sensor 72. The detection unit 110 acquires information regarding the vibration detection target 2 to which the vibration detection device 1 is attached as detection data. For example, the detection unit 110 detects the vibration of the vibration detection target 2 by the acceleration sensor 71, and acquires vibration data representing the vibration of the vibration detection target 2 as detection data.

[0091] The first transmission unit 120 is realized by the I / F 70, and transmits the detection data detected by the detection unit 110 to the first information processing device 300 via the gateway GW.

[0092] The first reception unit 310 is realized by the CPU 301 of the first information processing device 300 executing a program stored in the ROM 302 with the RAM 303 as a work area. Further, the first reception unit 310 receives the detection data from the first transmission unit 120, and transmits the received detection data to the abnormality determination unit 320 or the DB 330.

[0093] The abnormality determination unit 320 is realized by the CPU 301 of the first information processing device 300 executing a program stored in the ROM 302 with the RAM 303 as a work area. The abnormality determination unit 320 compares the detection data received from the first reception unit 310 or the detection data stored in the DB 330 with a predetermined threshold value stored in the DB 330, and determines whether an abnormality has occurred in the vibration detection target 2 to which the vibration detection device 1 is attached.

[0094] Further, the abnormality determination unit 320 may determine whether an abnormality has occurred in the vibration detection target 2 to which the vibration detection device 1 is attached based on both the detection data received from the first reception unit 310 or the detection data stored in the DB 330 and the vibration learning model, and detect the abnormality. The vibration learning model may be stored in the DB 330, or may be stored independently in a location other than the DB 330 within the first information processing device 300.

[0095] The vibration learning model is obtained by learning the correspondence between input information including detection data and output information including information on the presence or absence of an abnormality in the vibration detection target 2 determined based on the magnitude of the vibration of the vibration detection target 2 calculated based on the detection data. The detection data is information related to the vibration of the vibration detection target 2, and includes, for example, acceleration, illuminance, temperature, humidity, or temperature and humidity. The detection data may use the average value of the acquired detection data.

[0096] The learning result of the correspondence between the input information and the output information, that is, the learning result of the input-output relationship, is applied to the vibration learning model. The learning result of the correspondence between the input information and the output information is obtained, for example, by using the above detection data and data related to the magnitude of the vibration of the vibration detection target 2 calculated based on the detection data stored in the DB330 as learning data for learning. The vibration learning model can use a program for modeling the input-output relationship between the input information as input data and the output information as output data to make it calculable. Also, the vibration learning model may use a mathematical formula such as a function.

[0097] In the learning process of the vibration learning model, it is preferable to apply the algorithm of supervised learning. Examples of supervised learning include Linear regression, Logistic regression, Random Forest, Boosting, Support Vector Machine (SVM), Neural Network, etc. For the neural network, deep learning (deep neural network) with more than three layers of neural networks can be used. Examples of the types of neural networks that can be used include Convolutional Neural Network (CNN), Recurrent Neural Network (RNN), and General Regression Neural Network.

[0098] The judgment result of the abnormality judgment unit 320 is transmitted to the second information processing device 400 via the first transmission / reception unit 340 or stored in the DB 330.

[0099] The DB 330 is realized by the HDD / SSD 204 of the first information processing device 300 and stores detection data or screen information related to the abnormality detection system 100.

[0100] The first transmission / reception unit 340 is realized by the communication I / F 305 and transmits the judgment result of the abnormality judgment unit 320 and screen information to the second information processing device 400. Also, the first transmission / reception unit 340 receives the information transmitted by the second information processing device 400.

[0101] The screen information management unit 350 transmits the screen information stored in the DB 330 to the second information processing device 400 via the first transmission / reception unit 340 in response to a request from the second information processing device 400.

[0102] The second transceiver unit 410 is implemented by the communication I / F 405 and receives the determination result or screen information of the abnormality determination unit 320 received from the first transceiver unit 340. Also, the second transceiver unit 410 transmits information to the first information processing apparatus 300.

[0103] The display control unit 420 is implemented when the CPU 401 uses the RAM 403 as a work area and executes a program stored in the ROM 402. Also, the display control unit 420 performs control to cause the display unit 406 to display the abnormality determination result and screen information received by the second transceiver unit 410.

[0104] The operation reception unit 430 is implemented when the CPU 401 uses the RAM 403 as a work area and executes a program stored in the ROM 402, and receives operations of interfaces such as a keyboard and a mouse connected to the second information processing apparatus 400.

[0105] In FIG. 9, the case where the information processing system 200 receives the detection data transmitted from the vibration detection device 1 by the first information processing apparatus 300 has been described, but the detection data may be received by the second information processing apparatus 400. In this case, the second information processing apparatus 400 transmits the detection data received by the second information processing apparatus 400 from the second transceiver unit 410 of the second information processing apparatus 400 to the first information processing apparatus 300 and the first information processing apparatus 300 receives it.

[0106] FIG. 10 is a diagram showing an example of a data table stored in the DB 330. As shown in FIG. 10, in the data table, a sensor ID, an ID of the vibration detection target 2, and a threshold value for the abnormality determination unit 320 of the first information processing apparatus 300 to determine whether an abnormality has occurred in the vibration detection target 2 are stored in association with each other. Note that the “sensor ID” means the unique ID of the vibration detection device 1.

[0107] Next, the creation of the data table will be described while using a screen with no sensing.

[0108] FIG. 11 is a diagram showing an example of an image of a screen that is displayed on the display unit 406 of the second information processing apparatus 400 and is displayed when a user of the information processing terminal logs in to the abnormality detection system. As shown in FIG. 11, the login screen is provided with a field for entering a user ID and a field for entering a password (PW). When the user enters the user ID and PW and presses the login button, it is determined whether the user ID and PW match. The approval is performed by an approval information processing apparatus such as an approval server, but is not limited thereto, and the first information processing apparatus 300 may perform the approval. When the approval is performed, the screen after login is displayed.

[0109] FIG. 12 is a diagram showing an example of an image of the main screen after login. As shown in FIG. 12, the screen after login is provided with a management screen button for transitioning to a management screen for checking the operating status of the vibration detection target 2, a new registration button for transitioning to a registration screen for registering the vibration detection device 1 and the vibration detection target 2, a registration cancellation button for transitioning to a registration cancellation screen for canceling the registration of the vibration detection device 1 and the vibration detection target 2, and a logout button for logging out the logged-in user.

[0110] FIG. 13 is a diagram showing an example of an image of a screen that transitions when the management screen button is pressed on the main screen. As shown in FIG. 13, the management screen displays the number (shown as "Machine 1", "Machine 2", etc. in FIG. 13) and ID of the vibration detection target 2, the type of the vibration detection target 2 (such as a motor, a pump, or a press machine), and the operating time of the vibration detection target 2, and is provided with a detail button and a close button. When the detail button corresponding to "Machine 1" is pressed, the screen transitions to a sensor output screen for displaying the data detected by "Machine 1". When the close button is pressed, the screen transitions to the screen after login.

[0111] FIG. 14 is a diagram showing an example of an image of a sensor output screen. In FIG. 14, it is a screen when a detailed button corresponding to "Machine 1" is pressed on the management screen. On the sensor output screen, detection data of vibration detection results obtained by the acceleration sensor 71, temperature detection results obtained by the temperature and humidity sensor 72, and illuminance detection results obtained by the illuminance sensor 73, and the remaining battery level of the photoelectric conversion element 20 are displayed. Also, a close button is displayed on the management screen. Note that on the management screen, the humidity detection result obtained by the temperature and humidity sensor 72 may be further displayed. The humidity detection result may be displayed in place of at least any one of the detection data of the detection results of the acceleration sensor 71, the temperature and humidity sensor 72, and the illuminance sensor 73, and the remaining amount of the photoelectric conversion element 20. When the close button is pressed, the screen after login is transitioned to.

[0112] FIG. 15 is an image of a screen that transitions when the new registration button is pressed on the main screen. On the new registration screen, there are provided fields for inputting the machine name, fields for inputting the machine type, fields for inputting the sensor ID, and fields for uploading an image (photo) of the machine. Also, the machine ID assigned by the abnormality detection system 100 is displayed.

[0113] In the field for uploading an image of the machine, the image data of the machine can be uploaded by dragging and dropping the image data into the field, or by pressing the reference button to reference the image data and then pressing the upload button.

[0114] Also, a registration button is provided, and when the registration button is pressed, a message indicating that the registration is complete is displayed in a pop-up window.

[0115] Note that the machine ID is not limited to the method assigned by the abnormality detection system 100 and may be set by the user operating the information processing terminal. When the user sets it, the first information processing device 300 compares whether the machine ID input by the user is already in use with other machine IDs stored in the DB 330. If there is a duplication, it is preferable to display an error message. The error message may be displayed anywhere such as above, below, left, or right of the field for inputting the machine ID, or may be displayed in a pop-up window when the registration button is pressed.

[0116] FIG. 16 is a diagram showing an example of an image of a pop-up window that displays a message indicating completion of registration after the registration button is pressed on the registration screen. As shown in FIG. 16, the pop-up window is provided with a message indicating completion of registration, a button for returning to the main screen, and a button for continuing registration. When the button for returning to the main screen is pressed, the screen transitions to the main screen. When the button for continuing registration is pressed, the screen transitions to a new registration screen.

[0117] As described above, when the type of the vibration detection device 1 and the vibration detection target 2 are registered in the abnormality detection system 100, the information and image data input on the registration screen are transmitted to the first information processing device 300, and the first information processing device 300 stores the received information in the DB 330.

[0118] FIG. 17 is a diagram showing an example of an image of a registration cancellation screen for canceling the registration of the sensor and the machine displayed when the registration cancellation button is pressed on the main screen. As shown in FIG. 17, the registration cancellation screen displays the number (shown as "Machine 1", "Machine 2", etc. in FIG. 17) and ID of the vibration detection target 2, and the type of the vibration detection target 2 (such as a motor, a pump, or a press machine), and is provided with a check box, a cancellation button, a batch cancellation button, and a close button.

[0119] By pressing the cancel button, the user can cancel the registration of the vibration detection target 2 and the vibration detection device 1 one by one. Also, by checking multiple checkboxes, the user can cancel the registration of the selected machines and sensors. When the batch cancellation button is pressed, the registration of the machines and sensors selected with the checkboxes can be cancelled. When the cancellation of the registration is successful, a message indicating that the cancellation of the registration is complete is displayed in a pop-up window.

[0120] In the example of FIG. 17, "Machine 1" and "Machine 3" are selected, and by pressing the batch cancellation button, the registration of "Machine 1" and "Machine 3" can be cancelled.

[0121] When the close button is pressed, the screen transitions to the main screen.

[0122] FIG. 18 is a diagram showing an example of an image of a pop-up window that displays a message indicating that the cancellation is complete, which is displayed after the cancel button or the batch cancellation button is pressed on the cancellation screen. As shown in FIG. 18, the pop-up window is provided with a message indicating the cancellation, a button to return to the main screen, and a button to continue with the cancellation.

[0123] When the button to return to the main screen is pressed, the screen transitions to the main screen. When the button to continue with the cancellation is pressed, the screen transitions to the cancellation screen.

[0124] In this way, when the registration of the vibration detection device 1 and the vibration detection target 2 is cancelled, the information input on the cancellation screen is transmitted to the first information processing device 300, and the first information processing device 300 deletes the information of the vibration detection target 2 and the vibration detection device 1 that were the targets of the cancellation on the cancellation screen from the DB 330.

[0125] Next, an example of an abnormality detection method in which the abnormality detection system 100 determines the abnormality of the vibration detection target 2 and notifies the user will be described.

[0126] FIG. 19 is a flowchart showing an example of an abnormality detection method. As shown in FIG. 19, in step S11, the detection data detected by the detection unit 110 of the vibration detection device 1 is transmitted by the first transmission unit 120 to the first information processing device 300 together with the sensor ID.

[0127] Then, the first transmission / reception unit 340 of the first information processing device 300 receives the detection data transmitted in step S11.

[0128] Next, in step S12, the abnormality determination unit 320 of the first information processing device 300 acquires the threshold value corresponding to the sensor ID received in step S11 from the DB 330, compares it with the detection data received in step S11, and determines the presence or absence of an abnormality. As a result of the comparison, if there is no abnormality, the process returns to step S11. On the other hand, if an abnormality is detected in step S12, the process proceeds to step S13.

[0129] In step S13, the first transmission / reception unit 340 of the first information processing device 300 transmits to the second information processing device 400 a screen for displaying the determination result of the abnormality determination unit 320 acquired by the screen information management unit 350.

[0130] In step S14, the second transmission / reception unit 410 of the second information processing device 400 receives the screen information transmitted in step S13. Then, the display control unit 420 displays a screen indicating the state of the vibration detection target 2. When transmitting the screen information, it may be notified by posting a URL for displaying the screen information to a pre-specified email address.

[0131] In this case, the user can display the notification screen by selecting or inputting the URL. Also, in this case, when the URL is selected or input, the login screen shown in FIG. 11 may be displayed, and the notification screen may be displayed when the login is successful.

[0132] FIG. 20 is a diagram showing an example of an image of a notification screen that the display control unit 420 causes to be displayed on the display unit to the user in step S14. As shown in FIG. 20, on the notification screen, an image corresponding to the vibration detection target 2 determined to be abnormal by the abnormality determination unit 320 of the first information processing apparatus 300 in step S12 and the abnormality determined from the vibration detection apparatus 1 are displayed. In the example of FIG. 20, as the type of failure, a vibration detection result determined from the detection data of the acceleration sensor 71, a temperature detection result determined from the detection data of the temperature and humidity sensor 72, and an illuminance detection result detected from the detection data of the illuminance sensor 73 are displayed.

[0133] Further, on the notification screen, a sensor output screen button that transitions to the sensor output screen when pressed and a close button are provided. When the sensor output screen button is pressed, the sensor output screen shown in FIG. 14 corresponding to the sensor ID is displayed. Note that before transitioning to the sensor output screen, it may transition to the login screen shown in FIG. 11 and transition to the sensor output screen when the login is successful.

[0134] When the close button is pressed, the notification screen can be closed.

[0135] In this way, with the abnormality detection system 100, even when the user is in a remote location away from the factory where the vibration detection target 2 is installed, when an abnormality occurs in the vibration detection target 2, the user can confirm the abnormality of the vibration detection target 2.

[0136] Further, with the abnormality detection system 100, the user can confirm the states of a plurality of vibration detection targets 2 installed in the factory by checking the management screen of the second information processing apparatus 400.

[0137] Next, a communication method in which the vibration detection apparatus 1 transmits detection data to the first information processing apparatus 300 will be described using a sequence diagram.

[0138] FIG. 21A is a sequence diagram in the average value mode, which is a mode in which 1600 consecutive data items acquired by the acceleration sensor 71 are converted into an average value and a peak value and transmitted to the first information processing device 300. In this average value mode, data is transmitted by broadcast communication.

[0139] First, the acceleration sensor 71 transmits detection data, which is a measurement result, to the BLE module included in the vibration detection device 1.

[0140] Next, the BLE module transmits the detection data to the GW.

[0141] After that, the GW transmits the received detection data to the first information processing device 300.

[0142] FIG. 21B is a sequence diagram in the connection mode in which all 1600 consecutive data items acquired by the acceleration sensor 71 are transmitted to the first information processing device 300. In this connection mode, since the amount of data to be transmitted increases, the sensor and the GW communicate and connect to transmit the data.

[0143] First, the acceleration sensor 71 transmits detection data, which is a measurement result, to the BLE module included in the vibration detection device 1.

[0144] Next, the BLE module searches for the GW and, when a response is received from the GW, transmits the received detection data.

[0145] After that, the GW transmits the received detection data to the first information processing device 300.

[0146] In this way, the abnormality detection system 100 has the vibration detection device 1, and the vibration detection device 1 includes the housing 10 and the photoelectric conversion element 20. Thereby, the vibration detection device 1 can secure the power generation area of the photoelectric conversion element 20 as large as possible by making the housing 10 vertically long, can suppress the increase in the installation area on the vibration detection target 2, and can eliminate the need to replace the power storage member 90 with the photoelectric conversion element 20. Further, the vibration detection device 1 can suppress the occurrence of resonance by lowering its center of gravity C to a position below half of the height from the installation bottom surface of the housing 10 to the upper surface 111 of the housing 10. Therefore, the abnormality detection system 100 can continuously monitor the abnormality of the vibration detection target 2 while suppressing a decrease in detection accuracy even when the vibration detection target 2 has various sizes.

[0147] As described above, the embodiments of the present invention have been described. However, the above embodiments are presented as examples, and the present invention is not limited by the above embodiments. The above embodiments can be implemented in various other forms, and various changes and the like can be made without departing from the gist of the present invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

Example

[0148] Hereinafter, the embodiments will be described more specifically by showing examples and comparative examples. However, the embodiments are not limited by these examples and comparative examples.

[0149] <Example 1> [Fabrication of Vibration Detection Device] (Preparation of Housing Body and Base) A resin housing body having a substantially rectangular parallelepiped shape that is vertically long in a front view (bottom surface: 48 mm × 40 mm, height: 46.6 mm) and a stainless-steel base constituting the bottom thereof were prepared. (Preparation of Two Printed Circuit Boards) A first printed circuit board with an acceleration sensor, a temperature sensor, and a communication I / F attached to the upper surface of the substrate was prepared. An illuminance sensor was attached to the upper surface of the substrate, and a second printed circuit board with a secondary battery (capacity: 14 mA, mass: 1.5 g) attached to the lower surface of the substrate was prepared. The upper surface of the first printed circuit board and the lower surface of the second printed circuit board were connected with an FPC cable. (Fixing of solar cell panel) An adhesive was applied to the periphery of the solar cell panel having solar cells, and the solar cell panel was installed and fixed on the flat portions of the holes on the four side surfaces of the housing body, and a part of the side surface of the housing body was constituted by the solar cell panel. (Installation of the first printed circuit board on the base) The first printed circuit board was installed on two support legs provided to protrude from the upper surface of the base body constituting the base. (Installation of the first printed circuit board and the second printed circuit board into the housing body) The second printed circuit board prepared on the upper side of the housing body was fixed, and the base on which the first printed circuit board was installed was fitted and fixed to the lower part of the housing body so as to close the opening at the lower part of the housing body. At this time, the base on which the first printed circuit board was installed and the second printed circuit board were installed in the housing body so that the position of the acceleration sensor and the center of gravity of the vibration detection device were at positions below half of the height from the installation bottom surface of the housing to the upper surface of the housing. Thereby, the vibration detection device shown in FIG. 1 was manufactured. The total mass of the vibration detection device was 102 g.

[0150] (Calculation of (mc × xc) / (mg × xg)) The distance xc between the reference plane of the vibration detection device and the secondary battery was 38 mm, and the distance xg between the position of the center of gravity of the vibration detection device and the reference plane of the vibration detection device was 16 mm. Taking the mass of the secondary battery as mc and the total mass of the vibration detection device as mg, the "(mc × xc) / (mg × xg)" of the fabricated vibration detection device was calculated using the distance xc between the reference plane of the vibration detection device and the secondary battery and the distance xg between the position of the center of gravity of the vibration detection device and the reference plane of the vibration detection device. "(mc × xc) / (mg × xg)" represents the moment of the battery with respect to the total moment. When "(mc × xc) / (mg × xg)" is less than 0.33, it can be determined that the vibration detection device has a stable structure and resonance does not occur.

[0151] [Evaluation of Resonance] The fabricated vibration detection device was installed on the base material, and vibration (acceleration: 1G, frequency: 5 Hz to 1000 Hz) was applied to the base material. When the response frequency from 5 Hz to 1000 Hz at an acceleration of 1G was confirmed, whether resonance occurred in the housing of the vibration detection device was evaluated based on the following criteria. (Evaluation Criteria) A: The response frequency from 5 to 1000 Hz is less than ±0.5 dB B: The response frequency from 5 to 1000 Hz is less than ±1.5 dB C: The response frequency from 5 to 1000 Hz is less than ±3 dB D: The response frequency from 5 to 1000 Hz is ±3 dB or more

[0152] The capacity of the secondary battery, the total mass of the vibration detection device, "(mc × xc) / (mg × xg)", and the results of resonance are shown in Table 1.

[0153] <Examples 2 to 5, Comparative Examples 1 to 3> In Example 1, resonance was evaluated in the same manner as in Example 1, except that the total mass of the vibration detection device, (mc × xc) / (mg × xg), was changed to the values shown in Table 1. In Examples 1 to 5, the position of the acceleration sensor and the center of gravity of the vibration detection device were set at positions below half of the height from the installation bottom surface of the housing to the upper surface of the housing. In Comparative Examples 1 to 3, the position of the acceleration sensor was set at a position below half of the height from the installation bottom surface of the housing to the upper surface of the housing, but the center of gravity of the vibration detection device was set at a position exceeding half of the height from the installation bottom surface of the housing to the upper surface of the housing. Table 1 shows the position of the acceleration sensor, the position of the center of gravity of the vibration detection device, and the results of resonance. In Table 1, when both the position of the acceleration sensor and the position of the center of gravity of the vibration detection device are at positions below half of the height from the installation bottom surface of the housing to the upper surface of the housing, it is indicated as "A", and when the position of the center of gravity of the vibration detection device exceeds half of the height from the installation bottom surface of the housing to the upper surface of the housing, it is indicated as "B".

[0154]

Table 1

[0155] From Table 1, in Examples 1 to 5, the response frequencies from 5 to 1000 Hz were less than ±3 dB, and the resonance of the housing was suppressed. However, in Comparative Examples 1 to 3, the response frequencies from 5 to 1000 Hz were ±3 dB or more, and the suppression of the resonance of the housing was insufficient.

[0156] Therefore, if the position of the acceleration sensor of the vibration detection device and the center of gravity of the vibration detection device are at positions below half of the height from the installation bottom surface of the housing to the upper surface of the housing, the occurrence of resonance in the housing can be suppressed, and it can be said that the detection accuracy of mechanical abnormalities can be improved without replacing the secondary battery.

[0157] The aspects of the embodiments of the present invention are as follows, for example. <1> A vibration detection device including a housing and an acceleration sensor disposed within the housing, and installed on an object to be vibration-detected, wherein a photoelectric conversion element is disposed on a side surface of the housing, The acceleration sensor operates by power directly or indirectly supplied from the photoelectric conversion element. A vibration detection device, wherein a position of the acceleration sensor and a center of gravity of the vibration detection device are at positions not more than half of a height from an installation bottom surface of the housing to an upper surface of the housing. <2> The vibration detection device according to <1>, wherein the housing has a side surface with an area larger than an area of the installation bottom surface or has a height equal to or greater than a maximum diameter on the installation bottom surface. <3> The vibration detection device according to <1>, further comprising a secondary battery provided in the housing and rechargeably connected to the photoelectric conversion element. <1> or <2>, wherein when a mass of the secondary battery is mc, a distance between a reference plane of the vibration detection device and the secondary battery is xc, a total mass of the vibration detection device is mg, and a distance between a position of a center of gravity of the vibration detection device and the reference plane of the vibration detection device is xg, the following formula (1) is satisfied. (mc×xc) / (mg×xg)<0.25 ···(1) <4> The acceleration sensor is installed on a substrate. The vibration detection device according to any one of <1> to <3>, wherein the substrate is arranged in a spatially separated state from the photoelectric conversion element. <5> The vibration detection device according to any one of <1> to <4>, wherein the photoelectric conversion element is provided on the side surface so as to constitute the side surface. <6> The side surface has a recess for accommodating the photoelectric conversion element. <5>, wherein a depth of the recess is equal to or greater than a thickness of the photoelectric conversion element. <7> The vibration detection device according to <5>, wherein a position of the acceleration sensor and a center of gravity of the vibration detection device are at positions not more than half of an installation height of the photoelectric conversion element. <8> The vibration detection device according to <5>, further comprising a sealing member covering the photoelectric conversion element and the side surface. <5>, wherein a region of the sealing member facing the photoelectric conversion element is a transparent member that transmits light. <9> The vibration detection device according to <5>, further comprising a power storage member for storing electricity generated by the photoelectric conversion element. The power storage member is the vibration detection device according to any one of <1> to <8>, which is suspended downward from the upper part in the housing. <10> The power storage member is the vibration detection device according to <9>, which is arranged at the center in the housing. <11> The vibration detection device according to any one of <1> to <10>, which has a first transmission unit for transmitting the detected vibration data to the outside. <12> An abnormality detection system including the vibration detection device according to any one of <1> to <11> and an information processing device. The information processing device has a first reception unit for receiving the vibration data transmitted from the vibration detection device, and an abnormality determination unit for detecting that an abnormality has occurred based on the vibration data received by the first reception unit. The abnormality detection system having the above. <13> The abnormality determination unit is the abnormality detection system according to <12>, which detects the abnormality when the vibration data exceeds a preset threshold value of the vibration data. <14> The abnormality determination unit is the abnormality detection system according to <12> or <13>, which detects the abnormality based on both the vibration data and a vibration learning model. <15> The information processing device has a first transmission and reception unit for transmitting the abnormality detected by the abnormality determination unit to the outside, and further includes another information processing device for receiving the abnormality transmitted from the first transmission and reception unit. The abnormality detection system according to any one of <12> to <14>.

Explanation of Reference Numerals

[0158] 1 Vibration detection device 2 Vibration detection target 10 Housing 11 Bottomed cylindrical body 12 Installation bottom surface (base) 20 Photoelectric conversion element 30 Magnet 40 Switch 50, 50-1, 50-2 Printed circuit board 60 FPC cable 70 Sensor 71 Acceleration Sensor 72 Temperature and Humidity Sensor 73 Illuminance Sensor 80, 305, 405 Communication I / F 90 Power Storage Member 100 Abnormality Detection System 110 Detection Unit 111 Upper Surface 111a, 111b, 112B, 1121b Hole Parts 112 Side Surface 112A Fixed Part 112a Lower Part 200 Information Processing System 300 First Information Processing Device 310 First Reception Unit 320 Abnormality Judgment Unit 330 DB 340 First Transmission / Reception Unit 350 Screen Information Management Unit 400 Second Information Processing Device 410 Second Transmission / Reception Unit 1121 Concave Part 1121a Flat Part 1122 Sealing Member B Reference Plane C Center of Gravity

Prior Art Documents

Patent Documents

[0159]

Patent Document 1

Claims

1. A vibration detection device comprising a housing and an acceleration sensor disposed within the housing, the vibration detection device being installed on a vibration detection target, A photoelectric conversion element is disposed on a side surface of the housing, the acceleration sensor is operated by power supplied directly or indirectly from the photoelectric conversion element, A vibration detection device, wherein the position of the acceleration sensor and the center of gravity of the vibration detection device are at a position that is equal to or less than half the height from the installation bottom surface of the housing to the top surface of the housing.

2. The vibration detection device according to claim 1 , wherein the housing has a side surface with an area larger than an area of ​​the installation bottom surface, or has a height equal to or larger than a maximum diameter of the installation bottom surface.

3. a secondary battery provided in the housing and connected to the photoelectric conversion element so as to be rechargeable; The vibration detection device of claim 1, wherein the following formula (1) is satisfied when the mass of the secondary battery is mc, the distance between the reference surface of the vibration detection device and the secondary battery is xc, the total mass of the vibration detection device is mg, and the distance between the position of the center of gravity of the vibration detection device and the reference surface of the vibration detection device is xg. (mc xc) / (mg xg) < 0.25 ... (1)

4. The acceleration sensor is disposed on a substrate, The vibration detection device according to claim 1 , wherein the substrate is arranged spatially separated from the photoelectric conversion element.

5. The vibration detection device according to claim 1 , wherein the photoelectric conversion element is provided on the side surface so as to constitute the side surface.

6. the side surface has a recess for accommodating the photoelectric conversion element, The vibration detection device according to claim 5 , wherein the depth of the recess is equal to or greater than a thickness of the photoelectric conversion element.

7. 6. The vibration detection device according to claim 5, wherein a position of the acceleration sensor and a center of gravity of the vibration detection device are at a position equal to or less than half an installation height of the photoelectric conversion element.

8. a seal member covering the photoelectric conversion element and the side surface; The vibration detection device according to claim 5 , wherein the sealing member is a transparent member that transmits light in an area facing the photoelectric conversion element.

9. a storage member for storing electricity generated by the photoelectric conversion element, The vibration detection device according to claim 1 , wherein the power storage member is suspended downward from an upper portion within the housing.

10. The vibration detection device according to claim 9 , wherein the power storage member is disposed at a center within the housing.

11. 2. The vibration detection device according to claim 1, further comprising a first transmission section for transmitting detected vibration data to an outside.

12. A vibration detection device according to claim 1 and an information processing device, The information processing device includes: A first receiving unit that receives vibration data transmitted from the vibration detection device; an abnormality determination unit that detects the occurrence of an abnormality based on the vibration data received by the first receiving unit; An anomaly detection system having the above configuration.

13. The anomaly detection system according to claim 12 , wherein the anomaly determination unit detects the anomaly when the vibration data exceeds a preset threshold value for vibration data.

14. The anomaly detection system according to claim 12 , wherein the anomaly determination unit detects the anomaly based on both the vibration data and a vibration learning model.

15. the information processing device includes a first transmitting / receiving unit that transmits the abnormality detected by the abnormality determination unit to an outside; The anomaly detection system according to claim 12 , further comprising: another information processing device that receives the anomaly transmitted from the first transmitting / receiving unit.

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