Temperature detector

Abstract

To provide a temperature detector that can be attached to an object, thereby facilitating temperature control of the object.SOLUTION: A temperature detector 1 comprises: a metal plate 10 to be attached to an object; an insulation member 20 arranged on the metal plate 10; and an RFID tag 30 which is positioned inside the insulation member 20 and includes a substrate 31 having a first plate face 31a facing the metal plate 10 and a second plate face 31b on an opposite side of the first plate face 31a. The RFID tag 30 comprises: a temperature sensor 33 arranged on the first plate face 31a of the substrate 31; and an antenna 34 for transmitting a detected temperature of the temperature sensor 33 to a reader / writer. The temperature sensor 33 is spaced apart from the metal plate 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a temperature detection device. [Background technology]

[0002] Patent Document 1 discloses a bearing unit for a conveying device as an example of a mechanical component. The mechanical component in Patent Document 1 includes a housing, a bearing disposed in the housing, a sensor that detects the condition of the bearing, and a transmitter that wirelessly transmits information detected by the sensor.

[0003] The bearing, sensor, and transmitter are disposed within a housing. The sensor is, for example, a temperature sensor that detects the temperature of the bearing. If the condition of the bearing changes, the temperature of the bearing rises, which can cause an abnormality in the bearing. The mechanical component of Patent Document 1 can contribute to detecting an abnormality in the bearing based on the temperature detected by the temperature sensor. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-11312 Summary of the Invention [Problem to be solved by the invention]

[0005] A temperature sensor is pre-installed in the bearing unit for a conveying device in Patent Document 1. However, even for mechanical components that do not have a temperature sensor, there is a demand for easily managing the temperature of the mechanical components by adding a temperature sensor to the mechanical components later, for example, to detect abnormalities in the mechanical components.

[0006] An object of the present disclosure is to provide a temperature detection device that can be attached to an object and that can easily manage the temperature of the object. [Means for solving the problem]

[0007] A temperature detection device according to one embodiment of the present disclosure comprises a metal plate attached to an object, an insulating member placed on the metal plate, and an RFID tag located inside the insulating member and having a substrate having a first plate surface facing the metal plate and a second plate surface opposite the first plate surface, wherein the RFID tag comprises a temperature sensor placed on the first plate surface of the substrate so as to be spaced apart from the metal plate, and an antenna that transmits the temperature detected by the temperature sensor to a reader / writer.

[0008] According to this, a metal plate is attached to an object, and a temperature sensor included in the RFID tag detects the temperature of the object through the metal plate. The temperature detected by the temperature sensor is transmitted from the antenna of the RFID tag to a reader / writer. Thus, the user can obtain the temperature detected by the temperature sensor using the reader / writer and easily manage it. In other words, the temperature detection device can be attached to an object, making it easy to manage the temperature of the object.

[0009] In the temperature detection device according to the aspect of the present disclosure, the temperature sensor is spaced apart from the insulating member and directly faces the metal plate.

[0010] In this case, the temperature sensor does not detect the temperature of the insulating member, and therefore can accurately detect the temperature of the object through the metal plate.

[0011] In addition, in the temperature detection device according to one aspect of the present disclosure, the metal plate has a recess in which the temperature sensor is located and which comes into contact with the RFID tag.

[0012] This allows the temperature sensor to accurately detect the temperature of the object through the metal plate.

[0013] In the temperature detection device according to the aspect of the present disclosure, the antenna is an inverted-F antenna.

[0014] This allows the RFID tag to properly transmit the temperature detected by the temperature sensor even when a metal plate is placed near the antenna.

[0015] In addition, in a temperature detection device according to one embodiment of the present disclosure, the metal plate integrally has a first portion that overlaps the insulating member in a planar view, and two second portions that are located on opposite sides of the first portion in a planar view and do not overlap the insulating member, and each of the two second portions has a through hole.

[0016] This allows a user to attach a metal plate to an object via the through-hole. For example, the user can attach the metal plate to the object by forming a hole in the object to fit a bolt, and passing the bolt through the through-hole and fitting it into the hole.

[0017] In addition, in a temperature detection device according to one embodiment of the present disclosure, the metal plate integrally has a first portion that overlaps the insulating member in a planar view, and two second portions that are located on opposite sides of the first portion in a planar view and do not overlap the insulating member, and each of the two second portions has a pair of cutout portions that open to opposite sides in a planar view.

[0018] This allows a user to attach the metal plate to an object via the pair of cutouts. For example, the user can attach the metal plate to the object by hooking a belt-shaped fastening member onto the cutouts and fastening the metal plate to the object with the fastening member. [Effects of the Invention]

[0019] According to the present disclosure, the temperature detection device can be attached to an object, and can facilitate management of the temperature of the object. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a plan view of a temperature detection device according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a cross-sectional view of the temperature detection device taken along line II-II shown in FIG. [Figure 3] FIG. 3 is a rear view of the temperature detecting device shown in FIG. [Figure 4] FIG. 4 is a plan view of an RFID tag. [Figure 5] FIG. 5 is a cross-sectional view of the RFID tag taken along line VV shown in FIG. [Figure 6] FIG. 6 is a block diagram of an RFID tag. [Figure 7] FIG. 7 is a cross-sectional view of a temperature detection device according to the second embodiment of the present disclosure. [Figure 8] FIG. 8 is a cross-sectional view of a temperature detection device according to a third embodiment of the present disclosure. [Figure 9] FIG. 9 is a plan view of a temperature detecting device according to another first modified example of each embodiment of the present disclosure. [Figure 10] FIG. 10 is a side view of the temperature detecting device shown in FIG. 9 when viewed along the Y direction. [Figure 11] FIG. 11 is a side view of the temperature detecting device shown in FIG. 9 when viewed along the X direction. [Figure 12] FIG. 12 is a diagram showing an example of how the temperature detecting device shown in FIG. 9 is attached to an object. [Figure 13] FIG. 13 is a diagram showing another example of how the temperature detecting device shown in FIG. 9 is attached to an object. [Figure 14] FIG. 14 is a diagram showing a temperature detection device according to another second modified example of each embodiment of the present disclosure. [Figure 15] FIG. 15 is a diagram showing a temperature detection device according to another third modified example of each embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings, but the present disclosure is not limited thereto. The components of each embodiment and each modified example described below can be combined as appropriate. In addition, some components may not be used.

[0022] First Embodiment Fig. 1 is a plan view of a temperature detecting device 1 according to a first embodiment of the present disclosure. Fig. 2 is a cross-sectional view of the temperature detecting device 1 taken along line II-II shown in Fig. 1. Fig. 3 is a rear view of the temperature detecting device 1 shown in Fig. 1.

[0023] The X direction, Y direction, and Z direction shown in the drawings are perpendicular to one another and indicate directions of the temperature detecting device 1. The X direction, Y direction, and Z direction correspond to the width direction, depth direction, and height direction of the temperature detecting device 1. In this specification, "plan view" means viewing the temperature detecting device 1 along the Z direction. Note that the X direction, Y direction, and Z direction are merely examples, and the present disclosure is not limited to these directions.

[0024] The temperature detecting device 1 is attached to an object and detects the temperature of the object. The object is a ball nut, a bearing, a mechanical part including a bearing (for example, a plumber), or the like.

[0025] The temperature detecting device 1 includes a metal plate 10, an insulating member 20, and an RFID tag 30.

[0026] The metal plate 10 is plate-shaped with the X direction as the longitudinal direction and the Y direction as the lateral direction in a plan view. The metal plate 10 has a contact surface 10a that comes into contact with an object and an opposite surface 10b on the opposite side of the contact surface 10a. The material of the metal plate 10 includes iron. For example, the material of the metal plate 10 is stainless steel. The metal plate 10 has a first portion 11 and two second portions 12 that are integral with each other.

[0027] The first portion 11 is a portion that overlaps with the insulating member 20 in a plan view. The first portion 11 has two first through holes 11a that are spaced apart from each other in the X direction.

[0028] The two second portions 12 are located on opposite sides of the first portion 11 in plan view. The second portions 12 do not overlap the insulating member 20 in plan view. The second portions 12 are located on both sides of the first portion 11 in the X direction. Each of the two second portions 12 has a second through hole 12a (corresponding to a "through hole").

[0029] Each of the two second portions 12 has a pair of cutouts 12b. The pair of cutouts 12b is composed of two cutouts 12b1. The two cutouts 12b1 open to opposite sides in plan view. The two cutouts 12b1 are located on opposite sides of the second through hole 12a in plan view. The two cutouts 12b1 are aligned along the Y direction and open to opposite sides in the Y direction.

[0030] The insulating member 20 is disposed on the opposite surface 10b of the metal plate 10. The insulating member 20 has a rectangular parallelepiped shape, but it goes without saying that the shape is not limited to a rectangular parallelepiped. The insulating member 20 is made of a thermoplastic resin having electrical insulating properties. The RFID tag 30 is located inside the insulating member 20. In other words, the insulating member 20 houses the RFID tag 30. The insulating member 20 is formed by being integrally molded (insert molding) with the RFID tag 30.

[0031] The insulating member 20 has a flat surface H facing the opposite surface 10b of the metal plate 10. The insulating member 20 also has two protrusions 21 and a first recess 22.

[0032] The protrusion 21 protrudes from the plane H and fits into the first through-hole 11a of the metal plate 10. The first recess 22 opens to the plane H. A temperature sensor 33 (described later) is located inside the first recess 22 and is spaced apart from the insulating member 20.

[0033] The insulating member 20 is placed on the metal plate 10 with the protrusion 21 fitted into the first through-hole 11a and the first recess 22 covered. As a result, the RFID tag 30 is located inside the temperature detection device 1 and is not exposed. Therefore, even if lubricating oil, grease, or the like is used on the object, the lubricating oil, grease, or the like will not adhere to the RFID tag 30. Therefore, it is possible to prevent malfunction of the RFID tag 30 caused by the lubricating oil, grease, or the like adhering to the RFID tag 30.

[0034] Furthermore, the insulating member 20 is joined to the metal plate 10 in a state in which watertightness is ensured between the metal plate 10 and the flat surface H of the insulating member 20. The insulating member 20 is joined to the metal plate 10 by, for example, a waterproof joining member 40 (such as an adhesive or double-sided tape). Ensuring watertightness between the metal plate 10 and the flat surface H of the insulating member 20 means that changes in the properties of the joining member 40 caused by water are suppressed during use of the temperature detection device 1, and no problems arise in the operation of the RFID tag 30.

[0035] The joining member 40 has a hole 41 that overlaps with the first recess 22 in a plan view. This allows the temperature sensor 33 to directly face the metal plate 10.

[0036] Fig. 4 is a plan view of the RFID tag 30. Fig. 5 is a cross-sectional view of the RFID tag 30 taken along line VV shown in Fig. 4.

[0037] The RFID tag 30 is a passive RFID (Radio Frequency Identification) tag that communicates wirelessly with a reader / writer. The RFID tag 30 includes a substrate 31, an IC chip 32, a temperature sensor 33, and an antenna .

[0038] The substrate 31 is plate-shaped with its longitudinal direction in the X direction and its lateral direction in the Y direction in a plan view. The substrate 31 has a first plate surface 31a facing the opposite surface 10b of the metal plate 10 and a second plate surface 31b on the opposite side to the first plate surface 31a. The substrate 31 is electrically insulating. The material of the substrate 31 is, for example, a thermoplastic resin or ceramics.

[0039] The IC chip 32 is disposed on the first surface 31a of the substrate 31. The IC chip 32 is located inside the first recess 22 (see FIG. 2). The IC chip 32 is spaced apart from the metal plate 10 and the insulating member 20.

[0040] The temperature sensor 33 is disposed on the first plate surface 31a of the substrate 31. The temperature sensor 33 is integrated with the IC chip 32. That is, the temperature sensor 33 is spaced apart from the metal plate 10 and the insulating member 20. The temperature sensor 33 detects the temperature of an object (details will be described later).

[0041] The antenna 34 is an inverted F antenna and integrally includes a radiation conductor portion 34a, a ground conductor portion 34b, a short-circuit line portion 34c, and a feed line portion 34d.

[0042] The radiating conductor 34a has a rectangular shape in a plan view and is disposed on the second plate surface 31b. The ground conductor 34b has a rectangular shape in a plan view and is disposed on the first plate surface 31a. The radiating conductor 34a and the ground conductor 34b face each other in the Z direction. The ground conductor 34b is electrically connected to the first connection portion 32a and the second connection portion 32b of the IC chip 32.

[0043] The short-circuiting line 34c penetrates the substrate 31 and electrically connects the radiating conductor 34a and the ground conductor 34b. The power feed line 34d penetrates the substrate 31 and electrically connects the radiating conductor 34a and the ground conductor 34b. The short-circuiting line 34c and the power feed line 34d are located inside the peripheral edge of the ground conductor 34b and the peripheral edge of the radiating conductor 34a in a plan view.

[0044] 6 is a block diagram of the RFID tag 30. The RFID tag 30 further includes a control circuit 35 that controls the RFID tag 30. The control circuit 35 is included in the IC chip 32.

[0045] The control circuit 35 is electrically connected to the temperature sensor 33 and the antenna 34. The antenna 34 receives a carrier wave from the reader / writer at a radiation conductor portion 34a. The control circuit 35 is driven by power generated by the carrier wave.

[0046] The control circuit 35 acquires the temperature detected by the temperature sensor 33 and stores it in the memory area 35a. The control circuit 35 transmits the temperature detected by the temperature sensor 33 stored in the memory area 35a from the radiation conductor 34a of the antenna 34 to the reader / writer.

[0047] Furthermore, the control circuit 35 transmits to the reader / writer identification information (e.g., an identification number) that identifies the object in association with the temperature detected by the temperature sensor 33 and identification information that identifies the temperature detection device 1. The identification information is stored in advance in the memory area 35a by the reader / writer.

[0048] Next, a method for attaching the temperature detection device 1 to an object will be described.

[0049] The temperature detecting device 1 is attached to an object with the contact surface 10a of the metal plate 10 in contact with the object. For example, if the object has a hole to fit a bolt, the bolt passes through the second through-hole 12a of the metal plate 10 and fits into the hole in the object, thereby attaching the temperature detecting device 1 to the object.

[0050] Furthermore, the temperature detection device 1 is attached to the object by hooking a strip-shaped fastening member into the pair of cutout portions 12b of the metal plate 10 and fastening the metal plate 10 to the object. In this case, the fastening member is hooked in a state extending in the Y direction into each of the two pairs of cutout portions 12b. By using the fastening member to attach the temperature detection device 1, the temperature detection device 1 can be securely attached to the object even if the outer surface of the object is curved.

[0051] Next, the operation of the temperature detecting device 1 will be described.

[0052] When the temperature detection device 1 is attached to an object, heat from the object is transferred to the metal plate 10. In other words, the temperature of the object and the temperature of the metal plate 10 are approximately equal. As described above, the temperature sensor 33 directly faces the metal plate 10. Heat from the metal plate 10 is transferred to the temperature sensor 33 via the space within the first recess 22.

[0053] The user operates the reader / writer to transmit a carrier wave toward the temperature detection device 1. When the antenna 34 receives the carrier wave, the RFID tag 30 operates using the power generated by the carrier wave. Specifically, the temperature sensor 33 acquires the temperature of the metal plate 10, i.e., the temperature of the object, and the temperature detected by the temperature sensor 33 and each piece of identification information are transmitted from the antenna 34 to the reader / writer as described above. The temperature detected by the temperature sensor 33 and each piece of identification information received by the reader / writer are transmitted to, for example, a terminal device and stored in a memory unit of the terminal device.

[0054] The user obtains the temperature detected by the temperature sensor 33 via the reader / writer, and checks whether or not there is an abnormality in the object based on the temperature detected by the temperature sensor 33.

[0055] As described above, according to this embodiment, the temperature detection device 1 includes a metal plate 10 attached to an object, an insulating member 20 placed on the metal plate 10, and an RFID tag 30 located inside the insulating member 20 and having a substrate 31 with a first plate surface 31a facing the metal plate 10 and a second plate surface 31b opposite the first plate surface 31a. The RFID tag 30 includes a temperature sensor 33 placed on the first plate surface 31a of the substrate 31 at a distance from the metal plate 10, and an antenna 34 that transmits the temperature detected by the temperature sensor 33 to a reader / writer.

[0056] According to this, the metal plate 10 is attached to an object, and the temperature sensor 33 included in the RFID tag 30 detects the temperature of the object via the metal plate 10. The temperature detected by the temperature sensor 33 is transmitted from the antenna 34 of the RFID tag 30 to a reader / writer. Therefore, the user can obtain the temperature detected by the temperature sensor 33 via the reader / writer and easily manage it. In other words, the temperature detection device 1 can be attached to an object, and can easily manage the temperature of the object.

[0057] Furthermore, by separating the temperature sensor 33 from the metal plate 10, vibrations of an object in contact with the metal plate 10 are prevented from being transmitted to the temperature sensor 33. Therefore, breakdowns in the temperature sensor 33 can be prevented.

[0058] Furthermore, the temperature sensor 33 is spaced apart from the insulating member 20 and directly faces the metal plate 10 .

[0059] According to this, the temperature sensor 33 does not detect the temperature of the insulating member 20. Therefore, the temperature sensor 33 can detect the temperature of the object through the metal plate 10 with high accuracy.

[0060] Moreover, the antenna 34 is an inverted F antenna.

[0061] This allows the RFID tag 30 to properly transmit the temperature detected by the temperature sensor 33 even when the metal plate 10 is placed near the antenna 34.

[0062] The metal plate 10 also integrally includes a first portion 11 that overlaps the insulating member 20 in a plan view, and two second portions 12 that are located on opposite sides of the first portion 11 in a plan view and do not overlap the insulating member 20. Each of the two second portions 12 has a second through hole 12a.

[0063] This allows a user to attach the metal plate 10 to an object via the through-hole. For example, the user can attach the metal plate 10 to the object by forming a hole in the object to fit a bolt, and passing the bolt through the second through-hole 12a and fitting it into the hole.

[0064] The metal plate 10 also integrally includes a first portion 11 that overlaps the insulating member 20 in a plan view, and two second portions 12 that are located on opposite sides of the first portion 11 in a plan view and do not overlap the insulating member 20. Each of the two second portions 12 has a pair of cutout portions 12b that open to opposite sides in a plan view.

[0065] This allows the user to attach the metal plate 10 to an object via the pair of cutout portions 12b. For example, the user can attach the metal plate 10 to the object by hooking a belt-shaped fastening member onto the pair of cutout portions 12b and fastening the metal plate 10 to the object with the fastening member.

[0066] Second Embodiment Next, a temperature detecting device 1 according to a second embodiment of the present disclosure will be described, focusing mainly on the differences from the temperature detecting device 1 according to the first embodiment described above.

[0067] FIG. 7 is a cross-sectional view of a temperature detection device 1 according to the second embodiment of the present disclosure.

[0068] In the second embodiment, the insulating member 120 does not have the protrusion 21 or the first recess 22. The metal plate 110 does not have the first through hole 11a. The RFID tag 30 contacts the opposite surface 10b of the metal plate 110. The insulating member 120 is formed by integrally molding the RFID tag 30 and the metal plate 110. The temperature detecting device 1 of the second embodiment does not include the joining member 40. In the second embodiment, the plane H of the insulating member 120 joins to the opposite surface 10b of the metal plate 110 around the RFID tag 30 in a plan view.

[0069] The metal plate 110 also has a second recess 110c (corresponding to a "recess") on the opposite surface 10b. The temperature sensor 33 is located inside the second recess 110c. This separates the temperature sensor 33 from the metal plate 110 and the insulating member 120.

[0070] According to the temperature detecting device 1 of the second embodiment, the metal plate 110 has a second recess 110c inside which the temperature sensor 33 is located, and comes into contact with the RFID tag 30.

[0071] This allows the temperature sensor 33 to detect the temperature of the object through the metal plate 110 with high accuracy.

[0072] Third Embodiment Next, a temperature detecting device 1 according to a third embodiment of the present disclosure will be described, focusing mainly on the differences from the temperature detecting device 1 according to the first embodiment described above.

[0073] FIG. 8 is a cross-sectional view of a temperature detecting device 1 according to a third embodiment of the present disclosure.

[0074] In the third embodiment, the insulating member 220 does not have the protrusion 21 and the first recess 22. The metal plate 210 does not have the first through-hole 11a. The temperature detecting device 1 also includes a plurality of spacers 250.

[0075] The plurality of spacers 250 are sandwiched between the metal plate 210 and the RFID tag 30. The size of the plurality of spacers 250 is determined so that the temperature sensor 33 is spaced apart from the metal plate 210. The number of spacers 250 is two, but it goes without saying that the number is not limited to two.

[0076] The insulating member 220 is formed by integrally molding the RFID tag 30, the metal plate 210, and the plurality of spacers 250. In the third embodiment, the IC chip 32 integrated with the temperature sensor 33 contacts the insulating member 220. Heat from the object is transferred to the temperature sensor 33 via the metal plate 210 and the insulating member 220. In other words, the temperature sensor 33 detects the temperature of the object via the metal plate 210 and the insulating member 220.

[0077] <Modification> Next, the temperature detection device 1 according to the modified examples of the embodiments of the present disclosure will be described, mainly focusing on the differences from the temperature detection device 1 of the above-described embodiments.

[0078] For example, the antenna 34 of the RFID tag 30 may be an antenna other than an inverted-F antenna, and may be, for example, a monopole antenna or a loop antenna.

[0079] The RFID tag 30 may also be an active RFID tag, in which case the RFID tag 30 further includes a power source.

[0080] Furthermore, the IC chip 32 and the temperature sensor 33 may be separate bodies.

[0081] Furthermore, the metal plate 10 does not necessarily have to have the second through-hole 12a. In this case, the temperature detecting device 1 is attached to the object via the pair of cutout portions 12b.

[0082] Furthermore, the pair of cutouts 12b may not be formed on the metal plate 10. In this case, the temperature detecting device 1 is attached to the object via the second through-hole 12a.

[0083] The first recess 22 may also be filled with a thermally conductive paste. The temperature sensor 33 and the metal plate 10 are thermally connected via the thermally conductive paste. The thermally conductive paste is, for example, a silicon-based thermally conductive grease. Needless to say, the thermally conductive paste is not limited to silicon-based pastes, and any paste-like paste may be used. The thermally conductive paste may also be a thermosetting resin (for example, an epoxy resin) containing particles of Ag or other materials with relatively high thermal conductivity. Heat from the object is efficiently transferred to the temperature sensor 33 via the metal plate 10 and the thermally conductive paste.

[0084] Fig. 9 is a plan view of a temperature detecting device 1 according to another first modified example of each embodiment of the present disclosure. Fig. 10 is a side view of the temperature detecting device 1 shown in Fig. 9 as viewed along the Y direction. Fig. 11 is a side view of the temperature detecting device 1 shown in Fig. 9 as viewed along the X direction.

[0085] The temperature detecting device 1 according to this first modification does not include the metal plate 10. The insulating member 320 of the temperature detecting device 1 according to this first modification integrally includes a housing portion 320a and two flange portions 320b.

[0086] The receiving portion 320a receives the RFID tag 30. The receiving portion 320a covers the RFID tag 30 entirely.

[0087] The two flanges 320b are located on both sides of the storage area 320a in the X direction in a plan view. The thickness (length in the Z direction) of the flanges 320b is smaller than the thickness of the storage area 320a. Each of the two flanges 320b has a third through hole 323 and a pair of protrusions 324. The third through hole 323 is located in the center of the flange 320b in a plan view.

[0088] The pair of protrusions 324 is composed of two protrusions 324a that protrude in the Z direction. The two protrusions 324a are aligned along the Y direction. The two protrusions 324a are spaced apart from the storage portion 320a in the X direction.

[0089] 10, the insulating member 20 has a first groove G1 between the housing portion 320a and the protruding portion 324a. The first groove G1 is located on both sides of the housing portion 320a in the X direction. Furthermore, as shown in FIG. 11, the insulating member 20 has a second groove G2 between the two protruding portions 324a. The second groove G2 is located on both sides of the housing portion 320a in the X direction.

[0090] Next, a method for attaching the temperature detection device 1 of this first modified example to an object will be described.

[0091] The temperature detecting device 1 of this modified example is attached to an object with the flat surface H of the insulating member 20 in contact with the object. For example, if the object has a hole to fit a bolt, the bolt passes through the third through-hole 323 of the insulating member 20 and fits into the hole in the object, thereby attaching the temperature detecting device 1 to the object.

[0092] Fig. 12 is a diagram showing an example of attaching the temperature detecting device 1 shown in Fig. 9 to an object T. The object T shown in Fig. 12 is a cylindrical metal rod, an electric wire, or the like.

[0093] 12 is placed on the object T in a state where the X direction of the temperature detecting device 1 and the extension direction of the object T coincide with each other and the plane H of the insulating member 20 is in contact with the object T. Furthermore, the temperature detecting device 1 is attached to the object T by hooking a strip-shaped fastening member B into the first groove portion G1 and fastening the insulating member 20 to the object T with the fastening member B. In this case, the fastening member B is hooked into each of the two first groove portions G1 so as to fit in a state where it extends in the Y direction, and the fastening member B is wrapped around the object T in the circumferential direction of the object T.

[0094] Fig. 13 is a diagram showing another example of how the temperature detecting device 1 shown in Fig. 9 is attached to the object T. The object T shown in Fig. 13 has a rectangular parallelepiped shape.

[0095] 13 , the temperature detecting device 1 is attached to the object T by hooking the belt-shaped fastening member B into the second groove portion G2 and fastening the insulating member 20 to the object T with the fastening member B. In this case, one fastening member B is hooked so as to fit into two second groove portions G2 while extending in the X direction, and the fastening member B is wrapped around the object T.

[0096] 14 is a diagram showing a temperature detecting device 1 according to another second modified example of each embodiment of the present disclosure. The object T shown in FIG.

[0097] The temperature detecting device 1 of this second modified example does not include the metal plate 10. The insulating member 420 of this second modified example has a rectangular parallelepiped shape and accommodates the RFID tag 30 therein.

[0098] The insulating member 420 has six protrusions 425 that protrude from the surface on the +Z side. The six protrusions 425 are arranged in a matrix along the X and Y directions in a plan view.

[0099] The insulating member 420 has, on the +Z side, two third grooves G3 extending along the Y direction between two protruding portions 425 adjacent to each other in the X direction.

[0100] The temperature detecting device 1 of this second modified example is attached to the object T by hooking the strip-shaped fastening member B into the third groove portion G3 with the -Z side surface (corresponding to the plane H) of the insulating member 420 in contact with the object T, and fastening the insulating member 420 to the object T by the fastening member B. In this case, the fastening member B is hooked into each of the two third groove portions G3 so as to fit in a state extending in the Y direction, and the fastening member B is wrapped around the object T in the circumferential direction of the object T.

[0101] 15 is a diagram showing a temperature detecting device 1 according to another third modified example of each embodiment of the present disclosure. The object T shown in FIG.

[0102] The temperature detecting device 1 of this third modified example does not include the metal plate 10. The insulating member 520 of this third modified example has a rectangular parallelepiped shape and accommodates the RFID tag 30 therein.

[0103] The insulating member 520 has four protrusions 525 that protrude from the surface on the +Z side. The four protrusions 525 are arranged in a matrix along the X and Y directions in a plan view.

[0104] The insulating member 520 has, on the +Z side, one fourth groove G4 extending along the Y direction between two protruding portions 525 adjacent to each other in the X direction.

[0105] The temperature detecting device 1 of this third modified example is attached to the object T by hooking the strip-shaped fastening member B into the fourth groove portion G4 with the -Z side surface (corresponding to plane H) of the insulating member 520 in contact with the object T, and fastening the insulating member 520 to the object T by the fastening member B. In this case, the fastening member B is hooked into the fourth groove portion G4 so as to fit in a state extending in the Y direction, and the fastening member B is wrapped around the object T in the circumferential direction of the object T. [Explanation of symbols]

[0106] 1 Temperature detection device 10 metal plate 10a Contact surface 10b opposite side 11 Part 1 11a 1st through hole 12 Part 2 12a Second through hole (through hole) 12b Pair of notches 20 Insulating material 30 RFID tags 31 PCB 31a 1st plate surface 31b 2nd plate surface 32 IC chip 33 Temperature Sensor 34 Antenna 110c Second recess (recess)

Claims

1. a metal plate attached to the object; an insulating member disposed on the metal plate; an RFID tag located inside the insulating member and including a substrate having a first plate surface facing the metal plate and a second plate surface opposite the first plate surface, The RFID tag is a temperature sensor disposed on the first plate surface of the substrate in a state spaced apart from the metal plate; an antenna that transmits the temperature detected by the temperature sensor to a reader / writer; Temperature detection device.

2. the temperature sensor is spaced apart from the insulating member and directly faces the metal plate; The temperature detection device according to claim 1 .

3. The metal plate has a recess in which the temperature sensor is located and which contacts the RFID tag. The temperature detection device according to claim 1 .

4. The antenna is an inverted-F antenna. The temperature detection device according to claim 1 .

5. The metal plate is a first portion overlapping the insulating member in a plan view; two second portions that are located on opposite sides of the first portion in a plan view and do not overlap the insulating member; The two second portions each have a through hole. The temperature detection device according to claim 1 .

6. The metal plate is a first portion overlapping the insulating member in a plan view; two second portions that are located on opposite sides of the first portion in a plan view and do not overlap the insulating member; The two second portions each have a pair of cutout portions that open to opposite sides in a plan view. The temperature detection device according to claim 1 .

Images