CN107819293B - Moving contact with miniaturized electronic tag - Google Patents
Moving contact with miniaturized electronic tag Download PDFInfo
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- CN107819293B CN107819293B CN201711243532.8A CN201711243532A CN107819293B CN 107819293 B CN107819293 B CN 107819293B CN 201711243532 A CN201711243532 A CN 201711243532A CN 107819293 B CN107819293 B CN 107819293B
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- electronic tag
- ceramic substrate
- miniaturized
- moving contact
- fixing piece
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- 239000000758 substrate Substances 0.000 claims abstract description 61
- 239000000919 ceramic Substances 0.000 claims abstract description 59
- 239000002184 metal Substances 0.000 claims abstract description 49
- 230000005855 radiation Effects 0.000 claims abstract description 20
- 210000000078 claw Anatomy 0.000 claims description 8
- 239000013013 elastic material Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000012806 monitoring device Methods 0.000 description 7
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
- H02B11/10—Indicating electrical condition of gear; Arrangement of test sockets
Abstract
The invention provides a moving contact with a miniaturized electronic tag. The moving contact body is cylindrical, and the moving contact body comprises a plurality of metal contact pieces which are circumferentially distributed. The miniaturized electronic tag includes a miniaturized antenna and a chip connected to a feeding portion of the miniaturized antenna, and the miniaturized antenna includes a ceramic substrate, a radiation portion, a reflection portion, and a connection portion. The radiation part is formed on the first surface of the ceramic substrate. The reflecting part is formed on the second surface of the ceramic substrate. One end of the connecting part is electrically connected with the reflecting part, and the other end of the connecting part extends to the first surface of the ceramic substrate along the side wall of the ceramic substrate and forms a feed part for electrically connecting the chip with the radiating part. The mounting bracket is connected with the moving contact body and the miniaturized electronic tag, and the miniaturized electronic tag is fixed on the metal contact.
Description
Technical Field
The invention relates to the technical field of radio frequency, in particular to a moving contact with a miniaturized electronic tag.
Background
The moving contact in the handcart room of the electric cabinet is often accompanied with high-temperature heating phenomenon, and the long-time high-temperature heating often causes electric accidents, thereby causing great loss. Therefore, the temperature monitoring is needed to be carried out on the moving contact to realize early warning in advance, and a heating device is replaced in the electric power overhaul process, so that electric power accidents are avoided. The prior schemes for monitoring the temperature of the moving contact are as follows, the first is to adopt a battery-powered wireless temperature monitoring device, and the temperature measuring device cannot be directly arranged on the moving contact due to large volume and has high cost; in addition, due to the fact that the battery is used for power supply, due to the service life of the battery, the monitoring device needs to be maintained regularly, and potential safety hazards exist in the battery. The second temperature measuring method is to adopt a CT electricity taking type wireless temperature monitoring device, and the same temperature measuring device has the problems of large volume, incapability of being directly arranged on a moving contact and high cost; in addition, the monitoring device can start work only when the circuit is electrified and the electrified current is larger than the threshold value, and key monitoring data are easy to leak. The third is to adopt the wireless passive temperature monitoring device of surface acoustic wave, this kind of monitoring device has the volume too and can't install in the moving contact and problem with high costs directly, in addition, this kind of monitoring device self job stabilization nature is low, can't work steadily for a long time, only a small amount of ID distinguish, form the mutual interference between the cubical switchboard easily.
With the continuous development of the RFID technology, the wireless temperature monitoring of the moving contact can be realized by adopting the RFID technology and combining with a temperature measuring chip, so that secondary accidents are avoided. However, due to the special metal structure of the moving contact, the existing temperature measuring means can not avoid obviously changing the metal structure of the moving contact, thereby influencing the design performance index of the moving contact and being not applicable to the moving contact. On the other hand, if the temperature measuring device is not directly arranged on the metal contact piece of the moving contact, the temperature data has obvious lag or deviation, and the practical significance is low.
Disclosure of Invention
The invention provides a moving contact with a miniaturized electronic tag, which aims to solve the problem that the temperature of the moving contact in a handcart room of an electric cabinet cannot be monitored in the prior art.
In order to achieve the above object, the present invention provides a moving contact with a miniaturized electronic tag, which includes a moving contact body, a miniaturized electronic tag, and a mounting bracket. The moving contact body is cylindrical, and the moving contact body comprises a plurality of metal contact pieces which are circumferentially distributed. The miniaturized electronic tag includes a miniaturized antenna and a chip connected to a feeding portion of the miniaturized antenna, and the miniaturized antenna includes a ceramic substrate, a radiation portion, a reflection portion, and a connection portion. The radiation part is formed on the first surface of the ceramic substrate. The reflecting part is formed on the second surface of the ceramic substrate. One end of the connecting part is electrically connected with the reflecting part, and the other end of the connecting part extends to the first surface of the ceramic substrate along the side wall of the ceramic substrate and forms a feed part for electrically connecting the chip with the radiating part. The mounting bracket is connected with the moving contact body and the miniaturized electronic tag, and the miniaturized electronic tag is fixed on the metal contact.
According to an embodiment of the invention, the radiating portion has an open slot near one end of the connecting portion, the width of the open slot is larger than that of the connecting portion, and the other end of the connecting portion extends into the open slot.
According to an embodiment of the invention, the ceramic substrate has a rectangular parallelepiped structure, and a plurality of cutting areas with outward openings are formed on two sides of the radiating portion along the length direction of the ceramic substrate.
According to an embodiment of the invention, the ceramic substrate is columnar and has a circular, elliptical or racetrack cross section.
According to an embodiment of the present invention, when the cross section of the ceramic substrate is circular or elliptical, the sidewall of the ceramic substrate has at least one vertical plane, and the connection portion extends along the vertical plane.
According to an embodiment of the present invention, the chip is any one of an RFID chip with a temperature sensor, an RFID chip with a humidity sensor, or an RFID chip with a pressure sensor.
According to an embodiment of the invention, the mounting bracket includes a support plate, a first fixing member, a second fixing member, and a clamping assembly. The first fixing piece and the second fixing piece are oppositely arranged on two side edges of the supporting plate, an accommodating space for accommodating the electronic tag is formed between the first fixing piece and the second fixing piece, and the electronic tag is in interference fit with the two fixing pieces. The clamping assembly is arranged on the supporting plate and comprises at least two clamping claws clamped on two sides of the object.
According to an embodiment of the invention, the mounting bracket further comprises a support side plate connected between the first fixing member and the support plate.
According to an embodiment of the invention, the distance between the jaws clamped on both sides of the metal contact piece is gradually reduced in a direction away from the support plate and the jaws are made of an elastic material.
The invention also provides another moving contact with the miniaturized electronic tag, and the moving contact comprises a moving contact body, the miniaturized electronic tag and a mounting bracket. The moving contact body is cylindrical, and the moving contact body comprises a plurality of metal contact pieces which are circumferentially distributed. The miniaturized electronic tag includes a miniaturized antenna and a chip connected to a feeding portion of the miniaturized antenna, and the miniaturized antenna includes a ceramic substrate, a radiation portion, a reflection portion, and a connection portion. The radiation part is formed on the first surface of the ceramic substrate. The reflecting part is formed on the second surface of the ceramic substrate. The connecting portion is formed on the side wall of the ceramic substrate, the connecting portion comprises a first connecting portion and a second connecting portion, the first end of the first connecting portion is electrically connected with the reflecting portion, the first end of the second connecting portion is electrically connected with the radiating portion, a feeding portion for electrically connecting with the chip is formed between the second end of the first connecting portion and the second end of the second connecting portion, and the feeding portion is formed on the side wall of the ceramic substrate. The mounting bracket is connected with the moving contact body and the miniaturized electronic tag, and the miniaturized electronic tag is fixed on the metal contact.
In summary, the moving contact with the miniaturized electronic tag provided by the invention adopts the ceramic substrate with high dielectric constant as the substrate of the miniaturized antenna, the size of the antenna can be greatly reduced due to the high dielectric constant of the ceramic material, and no interference is caused to the performance of the moving contact when the moving contact is connected with the moving contact. The two surfaces of the ceramic substrate are respectively provided with the radiation part and the reflection part, the reflection part reflects electromagnetic waves radiated by the radiation part, the gain of the antenna is greatly improved, and meanwhile, when the reflection part is contacted with the metal contact piece, the antenna has good anti-metal performance and the effect of resisting the metal antenna. The miniaturized electronic tag with the temperature measuring function can monitor the temperature of the metal contact piece on the moving contact body due to the two characteristics of small size and metal resistance, and the difficult problem of temperature monitoring at the existing moving contact is effectively solved.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
Fig. 1 is an assembly schematic diagram of a moving contact with a miniaturized electronic tag according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the miniaturized electronic tag in fig. 1.
Fig. 3 is a schematic structural diagram of the miniaturized antenna in the miniaturized electronic tag shown in fig. 2.
Fig. 4 is a schematic structural diagram of fig. 3 at another view angle.
Fig. 5 is a schematic view of the mounting bracket of fig. 1.
Fig. 6 is a schematic view showing the assembly of the miniaturized electronic tag and the mounting bracket of fig. 1.
Fig. 7 is a schematic view of the structure of fig. 6 at another view angle.
Fig. 8 is a schematic structural diagram of a miniaturized electronic tag according to another embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a miniaturized electronic tag according to another embodiment of the present invention.
Fig. 10 is a graph showing the reflection coefficient versus frequency when the miniaturized antenna shown in fig. 3 is disposed on a square metal plate of 0.4 m by 0.4 m.
Fig. 11 shows a gain two-dimensional pattern at center frequency 915MHz for the miniaturized antenna of fig. 3 when disposed on a 0.4 m by 0.4 m square metal plate.
Fig. 12 shows a three-dimensional coordinate reference diagram.
Fig. 13 is an assembly schematic diagram of a moving contact with a miniaturized electronic tag according to a second embodiment of the present invention.
Fig. 14 is a schematic view showing the structure of the mounting bracket of fig. 13.
Fig. 15 is a schematic view showing the assembly of the miniaturized electronic tag and the mounting bracket of fig. 13.
Fig. 16 is a schematic view of the structure of fig. 15 at another view angle.
Detailed Description
Example 1
In the existing electric cabinet handcart room, the difficulty of utilizing the RFID tag with the temperature measuring function to monitor the temperature at the moving contact is mainly two: the first is that the existing RFID label with the temperature measuring function has larger volume, and when the RFID label is connected with the moving contact body, the characteristics of the moving contact body are interfered; the second is that the structure of the moving contact body is special, and the RFID tag with the temperature measuring function is difficult to be fixedly connected with the moving contact body.
In view of this, as shown in fig. 1 and 2, the present embodiment provides a moving contact with a miniaturized electronic tag including a moving contact body 10, a miniaturized electronic tag 20, and a mounting bracket 30. The moving contact body 10 is cylindrical, and the moving contact body 10 includes a plurality of metal contacts 101 arranged along a circumferential direction. The miniaturized electronic tag 20 includes a miniaturized antenna 1a and a chip 1b connected to a feeding portion of the miniaturized antenna, and the miniaturized antenna 1a includes a ceramic substrate 1, a radiation portion 2, a reflection portion 3, and a connection portion 4. The radiation portion 2 is formed on the first surface 11 of the ceramic substrate 1. The reflecting portion 3 is formed on the second surface 12 of the ceramic substrate 1. One end of the connecting part 4 is electrically connected with the reflecting part 3, and the other end extends to the first surface 11 of the ceramic substrate along the side wall of the ceramic substrate 1 and forms a feeding part 5 for electrically connecting the chip 1b with the radiating part 2. The chip 1b is electrically connected to the feeding portion 5.
The ceramic material has a very high dielectric constant, so that the ceramic substrate 1 can greatly reduce the size of the antenna, and the performance of the moving contact is not affected when the ceramic substrate is fixedly connected with the moving contact. The radiation part 2 and the reflection part 3 are oppositely arranged on two surfaces of the ceramic substrate 1, the reflection part 3 reflects electromagnetic waves radiated by the radiation part 2, so that the gain of the antenna is greatly improved, and meanwhile, the antenna has a good anti-metal effect and can be well applied to temperature monitoring at a moving contact.
In the present embodiment, the miniaturized electronic tag 10 has a rectangular parallelepiped shape as a whole, and the length and width of the miniaturized antenna 1a are smaller than those of the metal contact 101. When the miniaturized antenna 1a is installed, the length direction of the miniaturized antenna is parallel to the axial direction of the moving contact body 10, namely, the miniaturized electronic tag is tightly attached to the surface of the metal contact piece, and no interference is caused to the movement of the moving contact body. However, the present invention does not limit the mounting manner of the miniaturized electronic tag in any way. In other embodiments, when the size of the miniaturized antenna is not just equal to or smaller than the size of the metal contact, the length direction of the miniaturized electronic tag can be set along the tangential direction of the metal contact.
In this embodiment, as shown in fig. 3, the radiating portion 2 has an open slot 21 near one end of the connecting portion 4, the width of the open slot 21 is larger than that of the connecting portion 4, and the other end of the connecting portion 4 extends into the open slot 21, that is, the feeding portion 5 is formed on the first surface 11 of the ceramic substrate 1. In high voltage power systems it is desirable to have as seamless contact as possible between the reflector 3 and the metal object in order to avoid high voltage discharges, i.e. the chip 1b is not connected to the second surface 12 where the reflector 3 is located. In the present embodiment, the feeding portion 5 for electrically connecting the chip is formed on the first surface where the radiating portion 2 is located. However, the present invention is not limited in any way thereto. In other embodiments, the connection portion of the miniaturized antenna may include a first connection portion and a second connection portion, the first end of the first connection portion is electrically connected to the reflection portion, the first end of the second connection portion is electrically connected to the radiation portion, a feeding portion for electrically connecting the chip is formed between the second end of the first connection portion and the second end of the second connection portion, and the feeding portion is formed on a side wall of the ceramic substrate. Correspondingly, the chip in the formed miniaturized electronic tag is arranged on the side wall of the ceramic substrate.
In the present embodiment, the ceramic substrate 1 has a rectangular parallelepiped structure. However, the present invention is not limited in any way thereto. In other embodiments, as shown in fig. 8, the ceramic substrate may be columnar and circular in cross-section. At this time, in order to facilitate the arrangement of the connection portion, a vertical plane is formed on the sidewall of the ceramic substrate, and the connection portion extends to the first surface along the vertical plane. In order to further improve the performance of the antenna, it may be further provided that the connection portion includes a vertical connection portion located on a vertical plane and a horizontal connection portion located on the first surface of the ceramic substrate, the width of the horizontal connection portion being greater than or equal to the width of the vertical connection portion. Alternatively, in other embodiments, the cross-section of the columnar ceramic substrate may be elliptical. Alternatively, as shown in fig. 9, the cross section of the columnar ceramic substrate is in a racetrack shape, and the connection portion may extend to the first surface along two vertical side walls of the ceramic substrate, or when it is required to extend to the first surface along the circular arc side walls at both ends of the ceramic substrate, a vertical plane may be provided on the circular arc side walls.
In the present embodiment, along the length direction of the ceramic substrate 1, the two sides of the radiation portion 2 have a plurality of cutting areas 22 with openings facing outwards. The provision of the cut-out 22 allows current on the antenna to flow along the boundary of the cut-out, lengthening the loop of current and thus further reducing the size of the antenna. In this embodiment, the radiation portion 2 has two rectangular cutting areas thereon. However, the present invention is not limited in any way thereto. In other embodiments, the cutting zones 22 may be any one or a combination of circular, elliptical or triangular in shape and the cutting zones may be uniformly staggered or pairwise opposed.
In the present embodiment, the chip 1b is an RFID chip with a temperature sensor, and the operating frequency range thereof is 902-928 MHz. However, the present invention is not limited in any way thereto. In other embodiments, the chip 1b may be an RFID chip with a humidity sensor or an RFID chip with a pressure sensor.
Since the conventional RFID tag cannot be applied to the moving contact body, the reading capability of the miniaturized electronic tag provided in the embodiment does not have a reference object when the miniaturized electronic tag is mounted on the moving contact body, but the miniaturized electronic tag provided in the embodiment has a far-reaching data reading capability while the size is reduced by placing the miniaturized antenna on a square metal plate of 0.4 m by 0.4 m.
Fig. 10 is a graph showing the reflection coefficient as a function of frequency when the miniaturized antenna shown in fig. 3 is disposed on a square metal plate of 0.4 m by 0.4 m. Wherein, the heavenReflection coefficient of lineIn the present embodiment, the impedance Z of the chip at 915MHz of center frequency in the operating band ic =40-j×200, assuming that the chip impedance remains unchanged within the operating band; z is Z a The antenna impedance is also plural; the reflection coefficient (dB form) of the antenna s_rfid=20 lg|Γ m |。
Far distance of label identificationLambda is the operating wavelength of the tag, where P th For the sensitivity of the chip, the general chip determines that the term is a known term; p (P) t For the transmitting power of the reader-writer, the maximum transmitting power of the common fixed reader-writer is 30dBm; g t Gain for the antenna of the reader-writer end; τ=1- |Γ m | 2 As a transmission coefficient, ρ is a polarization matching coefficient of the reader antenna and the tag antenna, and when the polarization of the reader antenna is completely matched with the polarization of the tag antenna, the coefficient is 1 at most; η is the radiation efficiency of the antenna, and is at most 1. Thus, in the case of chip, reader and reader-side antenna determination, the furthest identifying distance of the tag depends on the gain G of the tag antenna r And the transmission coefficient tau between the tag antenna and the chip.
Fig. 11 shows a gain two-dimensional pattern at center frequency 915MHz for the miniaturized antenna of fig. 3 when disposed on a 0.4 m by 0.4 m square metal plate. The two-dimensional pattern is a two-dimensional result of a cut along two mutually perpendicular coordinate planes of the three-dimensional pattern, the three-dimensional pattern being shown in fig. 12. Wherein the solid line represents the two-dimensional result of the segmentation along the coordinate plane XOZ; the dashed line represents the two-dimensional result of the splitting along the coordinate plane YOZ, the maximum gain of the antenna in the YOZ plane range is denoted by the symbol m1 and is-0.46 dB, and in the XOZ plane range, the maximum gain of the antenna is very close to the maximum gain in the YOZ plane range, so that the three-dimensional maximum gain of the tag can be considered as-0.46 dB (915 MHz), i.e. the tag is the most distant from the identification distance R, as a whole tag Tag antenna gain in formulaG r Is-0.46 dB (915 MHz). The antenna gain shows that the miniaturized electronic tag provided by the embodiment has a very long reading distance while the antenna size is reduced. Also, wireless monitoring of the temperature on the metal contact can be well achieved when it is fixed to the metal contact 101.
After the electronic tag is reduced in size, the connection mode between the electronic tag and the moving contact body needs to be considered. In order to ensure accuracy and real-time performance of temperature monitoring, a miniaturized electronic tag is required to be mounted on the metal contact 101 of the moving contact body. In this embodiment, the mounting bracket 30 includes a support plate 31, a first fixing member 32, a second fixing member 33, and a clamping assembly 34. The first fixing piece 32 and the second fixing piece 33 are oppositely arranged on two side edges of the supporting plate 31, an accommodating space for accommodating the electronic tag is formed between the first fixing piece 32 and the second fixing piece 33, and the miniaturized electronic tag 20 is in interference fit with the two fixing pieces. The clamping assembly 34 is provided to the support plate 31, and the clamping assembly 34 includes at least two jaws 341 clamped to both sides of the object. In the present embodiment, the clamping assembly 34 includes four clamping jaws 341, and the four clamping jaws 341 are disposed opposite to each other. However, the present invention is not limited in any way thereto.
To increase the strength of the connection between the clamping assembly 34 and the metal contact 101, in this embodiment, each of the jaws 341 is made of an elastic material and the distance between the jaws 341 located at both sides of the metal contact 101 decreases in a direction away from the support plate 31. This arrangement allows the lower ends of the jaws 341 to be firmly clamped to both sides of the metal contact. In this embodiment, the claw 341 is a metal sheet with elasticity. However, the present invention is not limited in any way thereto. Further, in order to prevent the mounting bracket 30 from being separated from the metal contact 101, a limiting hook 341a is disposed at the end of each jaw 341, and the limiting hook 341a is clamped at the bottom of the metal contact 101.
Example two
As shown in fig. 13 to 16, this embodiment is substantially the same as the first embodiment and its variations, except that the mounting bracket 30 further includes a support side plate 35, and the support side plate 35 is connected between the first fixing member 32 and the support plate 31. When the shape or size of the miniaturized electronic tag 20 is changed (for example, the long side is longer than the length of the metal contact), the miniaturized electronic tag 20 needs to be installed by rotating a certain angle in order to avoid the interference of the miniaturized electronic tag 20 to the metal contact. In the present embodiment, the support side plate 35 is provided perpendicularly to the support plate 31. However, the present invention is not limited in any way thereto. In other embodiments, the included angle between the supporting side plate 35 and the supporting plate 31 can be adjusted according to the size and shape of the miniaturized electronic tag 20.
In summary, the moving contact with the miniaturized electronic tag provided by the invention adopts the ceramic substrate with high dielectric constant as the substrate of the miniaturized antenna, the size of the antenna can be greatly reduced due to the high dielectric constant of the ceramic material, and no interference is caused to the performance of the moving contact when the moving contact is connected with the moving contact. The two surfaces of the ceramic substrate are respectively provided with the radiation part and the reflection part, the reflection part reflects electromagnetic waves radiated by the radiation part, the gain of the antenna is greatly improved, and meanwhile, when the reflection part is contacted with the metal contact piece, the antenna has good anti-metal performance and the effect of resisting the metal antenna. The miniaturized electronic tag with the temperature measuring function can monitor the temperature of the metal contact piece on the moving contact body due to the two characteristics of small size and metal resistance, and the difficult problem of temperature monitoring at the existing moving contact is effectively solved.
Although the invention has been described with reference to the preferred embodiments, it should be understood that the invention is not limited thereto, but rather may be modified and varied by those skilled in the art without departing from the spirit and scope of the invention.
Claims (7)
1. A moving contact with miniaturized electronic tag, characterized by comprising:
the movable contact body is cylindrical and comprises a plurality of metal contact pieces distributed along the circumferential direction;
a miniaturized electronic tag including a miniaturized antenna and a chip connected to a feeding portion of the miniaturized antenna, the miniaturized antenna comprising:
a ceramic substrate;
a radiation part formed on the first surface of the ceramic substrate;
a reflection part formed on the second surface of the ceramic substrate;
one end of the connecting part is electrically connected with the reflecting part, and the other end of the connecting part extends to the first surface of the ceramic substrate along the side wall of the ceramic substrate and forms a feed part for electrically connecting the chip with the radiating part;
the mounting bracket is connected with the moving contact body and the miniaturized electronic tag, and the miniaturized electronic tag is fixed on the metal contact; the mounting bracket comprises a supporting plate, a first fixing piece, a second fixing piece and a clamping assembly; the first fixing piece and the second fixing piece are oppositely arranged on two side edges of the supporting plate, an accommodating space for accommodating the electronic tag is formed between the first fixing piece and the second fixing piece, and the electronic tag is in interference fit with the two fixing pieces; the clamping assembly is arranged on the supporting plate and comprises at least two clamping claws clamped on two sides of the object, the distance between the clamping claws clamped on two sides of the metal contact piece is gradually reduced along the direction away from the supporting plate, and the clamping claws are made of elastic materials; the mounting bracket further comprises a support side plate connected between the first fixing piece and the support plate.
2. The moving contact with miniaturized electronic tag of claim 1, wherein the radiating portion has an open slot at one end near the connecting portion, the open slot having a width greater than the connecting portion, and the other end of the connecting portion extends into the open slot.
3. The moving contact with a miniaturized electronic tag according to claim 1, wherein the ceramic substrate has a rectangular parallelepiped structure, and a plurality of cut areas with openings facing outward are provided along both sides of the radiating portion in the length direction of the ceramic substrate.
4. The moving contact with miniaturized electronic tag of claim 1, wherein the ceramic substrate is columnar and has a circular, elliptical or racetrack cross section.
5. The moving contact with miniaturized electronic tag of claim 4, wherein when the cross section of the ceramic substrate is circular or elliptical, the side wall of the ceramic substrate has at least one vertical plane, and the connection portion extends along the vertical plane.
6. The moving contact with miniaturized electronic tag according to claim 1, wherein the chip is any one of an RFID chip with a temperature sensor, an RFID chip with a humidity sensor, or an RFID chip with a pressure sensor.
7. A moving contact with miniaturized electronic tag, characterized by comprising:
the movable contact body is cylindrical and comprises a plurality of metal contact pieces distributed along the circumferential direction;
a miniaturized electronic tag including a miniaturized antenna and a chip connected to a feeding portion of the miniaturized antenna, the miniaturized antenna comprising:
a ceramic substrate;
a radiation part formed on the first surface of the ceramic substrate;
a reflection part formed on the second surface of the ceramic substrate;
the connecting part is formed on the side wall of the ceramic substrate and comprises a first connecting part and a second connecting part, the first end of the first connecting part is electrically connected with the reflecting part, the first end of the second connecting part is electrically connected with the radiating part, a feeding part for electrically connecting the chip is formed between the second end of the first connecting part and the second end of the second connecting part, and the feeding part is formed on the side wall of the ceramic substrate;
the mounting bracket is connected with the moving contact body and the miniaturized electronic tag, and the miniaturized electronic tag is fixed on the metal contact; the mounting bracket comprises a supporting plate, a first fixing piece, a second fixing piece and a clamping assembly; the first fixing piece and the second fixing piece are oppositely arranged on two side edges of the supporting plate, an accommodating space for accommodating the electronic tag is formed between the first fixing piece and the second fixing piece, and the electronic tag is in interference fit with the two fixing pieces; the clamping assembly is arranged on the supporting plate and comprises at least two clamping claws clamped on two sides of the object, the distance between the clamping claws clamped on two sides of the metal contact piece is gradually reduced along the direction away from the supporting plate, and the clamping claws are made of elastic materials; the mounting bracket further comprises a support side plate connected between the first fixing piece and the support plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711243532.8A CN107819293B (en) | 2017-11-30 | 2017-11-30 | Moving contact with miniaturized electronic tag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711243532.8A CN107819293B (en) | 2017-11-30 | 2017-11-30 | Moving contact with miniaturized electronic tag |
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| CN107819293A CN107819293A (en) | 2018-03-20 |
| CN107819293B true CN107819293B (en) | 2024-02-27 |
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|---|---|---|---|---|
| CN110108372A (en) * | 2019-05-07 | 2019-08-09 | 杭州电力设备制造有限公司 | A kind of crane with wireless and passive temperature sensing device |
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| CN107819293A (en) | 2018-03-20 |
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