CN210774425U

CN210774425U - Cable joint temperature measurement structure based on RFID temperature measurement label

Info

Publication number: CN210774425U
Application number: CN201921736582.4U
Authority: CN
Inventors: 徐超; 刘健; 和晓; 林生洲; 祝祺斌
Original assignee: Zhejiang Johar Technology Co ltd
Current assignee: Zhejiang Johar Technology Co ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-06-16
Anticipated expiration: 2029-10-16

Abstract

The utility model discloses a cable joint temperature measurement structure based on RFID temperature measurement label, including RFID temperature measurement label, insulating end cap and cable joint, be equipped with temperature measurement spread groove and connecting piece in the cable joint, be provided with the bolt on the connecting piece, the bolt is located the temperature measurement spread groove, install flat pad, bullet pad and nut on the bolt, insulating end cap one side is equipped with the becket, tight becket is pasted to RFID temperature measurement label one side, insulating end cap stopper is tight to the temperature measurement spread groove. By adopting the technical scheme, the cable joint has the advantages of simple structure, reasonable technology, convenience in installation, particular suitability for cable joints, various manufacturing raw materials, low price, difficulty in damage, convenience in installation, strong temperature resistance, capability of carrying out real-time monitoring and easiness in popularization.

Description

Cable joint temperature measurement structure based on RFID temperature measurement label

Technical Field

The utility model relates to a power equipment technical field specifically indicates a cable joint temperature measurement structure based on RFID temperature measurement label.

Background

In a power supply system, the requirement on the reliability of power supply is higher and higher, and a ring main unit, a high-voltage cable branch box and the like of a transformer substation are important electrical equipment and are easy to generate heat, so that the temperature measurement of key nodes of the ring main unit, the high-voltage cable branch box and the like becomes more and more important.

In the practical application of electric power cable, the key node of looped netowrk cabinet and high tension cable feeder pillar etc. is located cable joint department usually, and this part node can be because ageing, contact failure, the load is overweight or artificial misoperation to lead to resistance increase and generate heat, serious can puncture even and cause the electric power accident, make equipment such as cables have certain application risk at any time, in case this type of problem takes place, the cable is very probably can be fired on fire, the consequence and the loss of bringing are very huge. In order to solve the problem of fire, the cable risk needs to be warned, and the cable temperature detection is a very effective method in terms of industry experience.

The traditional method for detecting the temperature of the cable has low efficiency and no real-time property, is easy to cause danger in a free period of inspection, is easy to cause low-level errors in manual work, and has certain danger for workers when measuring the high-voltage cable; there are some cable temperature check out test set in recent times to adopt the sensor mode, it can real-time detection cable temperature, data pass through wireless mode and give the backstage and handle, real-time and efficiency scheduling problem has been solved, certain intelligence has, but most all have the installation difficulty, the temperature toleration is poor, shortcoming such as anti-interference not, but these sensing equipment all need the battery, these batteries have life-span problem, in addition when the risk of starting a fire takes place, the battery can take place the burning or explode, the severity of risk is aggravated more likely.

In order to solve the technical problem of passive temperature measurement, electronic and material researchers propose a sound surface temperature measurement scheme and produce related products, the scheme solves the risk problem of the battery, but the sound surface device has higher requirements on the structure of the product and is inconvenient to install; moreover, the characteristics of data returned from different devices are different, and each group of products and environmental factors need to be modified, so that the application is also limited.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that comes to an end aims at providing a cable joint temperature measurement structure based on RFID temperature measurement label, places inside cable joint, can measure the joint inside temperature outside cable joint to simple structure, it is various and the price is low to make the raw materials, and is not fragile, simple to operate, and the temperature toleration is strong, can carry out real-time supervision, easily promotes.

In order to solve the technical problem, the utility model discloses a technical scheme does:

the utility model provides a cable joint temperature measurement structure based on RFID temperature measurement label, includes RFID temperature measurement label, insulating end cap and cable joint, be equipped with temperature measurement spread groove and connecting piece in the cable joint, be provided with the bolt on the connecting piece, the bolt is located the temperature measurement spread groove, install flat pad, bullet pad and nut on the bolt, insulating end cap one side is equipped with the becket, RFID temperature measurement label one side pastes tight becket, insulating end cap stopper is tight to the temperature measurement spread groove.

Preferably, one end of the insulating plug is provided with an annular groove, and the metal ring is sleeved in the annular groove.

Preferably, one end of the insulating plug is provided with a groove, and the groove is matched with the outer wall of the nut.

Preferably, the RFID temperature measurement tag comprises an RFID tag antenna and an RFID tag chip, the RFID tag antenna comprises a substrate and a copper sheet, the substrate is of an annular or semi-annular structure, the copper sheet is attached to the surface of the substrate, and the RFID tag chip is connected with the capacitive coupling poles at the two ends of the RFID tag antenna respectively.

Preferably, the RFID temperature measurement tag is sleeved on the annular groove.

Preferably, the outer wall of the metal ring is coated with a silica gel sleeve.

Preferably, the substrate is made of FR-4 epoxy glass fiber.

Preferably, the copper sheet is coated with a protective ink layer.

Preferably, the RFID tag chip supports an EPC Global C1G2 communication interface.

Preferably, the other end of the insulating plug is provided with a handle part.

The utility model has the following characteristics and beneficial effect:

by adopting the technical scheme, the cable joint has the advantages of simple structure, reasonable technology, convenience in installation, particular suitability for cable joints, various manufacturing raw materials, low price, difficulty in damage, convenience in installation, strong temperature resistance, capability of carrying out real-time monitoring and easiness in popularization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of the RFID temperature measurement tag in fig. 1.

In the figure, 1-RFID temperature measurement label, 101-copper sheet, 102-substrate, 103-RFID label chip, 2-insulation plug, 3-nut, 4-elastic pad, 5-flat pad, 6-bolt, 7-cable joint, 8-temperature measurement connecting groove, 9-connecting piece, 10-annular groove, 11-metal ring, 12-handle part and 13-groove.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The utility model provides a RFID temperature measurement label 1 for cable joint, as shown in fig. 1, including RFID temperature measurement label 1, insulating end cap 2 and cable joint 7, be equipped with temperature measurement spread groove 8 and connecting piece 9 in the cable joint 7, be provided with bolt 6 on the connecting piece 9, bolt 6 is located temperature measurement spread groove 8, install flat pad 5, bullet pad 4 and nut 3 on the

bolt

6, 2 one sides of insulating end cap are equipped with becket 11, tight becket 11 is pasted to 1 one side of RFID temperature measurement label, 2 chocks of insulating end cap to temperature measurement spread groove 8.

It can be understood that cable joint is T type structure, is equipped with two connecting cable conductor's spread groove on the cable joint to the connecting piece is the conductor, and RFID temperature measurement label 1 is through the temperature monitoring to the temperature measurement connecting piece, thereby obtains the temperature data of the key node such as looped netowrk cabinet and high tension cable feeder pillar.

The utility model discloses a further setting, the one end of insulating end cap 2 is equipped with ring channel 10, becket 11 cup joints in ring channel 10.

Above-mentioned technical scheme, RFID temperature measurement label 1 can paste tight becket 11 to the temperature measurement data is more accurate.

The utility model discloses a further setting, it is further, the one end of insulating end cap 2 is equipped with recess 13, recess 13 cooperatees with the outer wall of nut 3. And the other end of the insulating plug 2 is provided with a handle part 12.

It can be understood that the bottom of the groove 13 is provided with a threaded hole 14 matched with the bolt 6, so that the installation can be ensured to be firmer, and the phenomenon of looseness can not occur.

Thereby the rotatory insulating end cap 2 of accessible for nut 3 screws, and then can ensure that RFID temperature measurement label 1 can paste tight becket 11, thereby temperature measurement data is more accurate. In addition, the handle part 12 is provided, so that the screwing operation of the insulating plug 2 is facilitated.

Specifically, the outer wall of the metal ring is coated with a silica gel sleeve. So, through the elastic characteristic of silica gel cover to can compress tightly RFID temperature measurement label 1.

The utility model discloses a further setting, as shown in FIG. 2, including RFID tag antenna and RFID tag chip 103, RFID tag antenna includes base plate 102 and copper sheet 101, base plate 102 is annular or semi-annular structure, copper sheet 101 is attached on base plate 102 surface, RFID tag chip 103 is connected with the capacitive coupling utmost point at RFID tag antenna both ends respectively.

The substrate 102 with the preferred annular structure is more firmly installed, and the RFID temperature measurement tag 1 is sleeved on the annular groove 10, so that the contact area with the metal ring 11 is larger, and the monitoring precision is higher.

Among the above-mentioned technical scheme, simple structure, the technique is reasonable, and simple to operate is particularly suitable for cable joint, makes that the raw materials are various and the price is low, and is not fragile, simple to operate, and the temperature toleration is strong, can carry out real-time supervision, easily promotes.

Further, the substrate 102 is made of FR-4 epoxy glass fiber. The copper sheet 101 is coated with a protective ink layer.

By additionally arranging the protective ink layer, the copper sheet is prevented from being oxidized by contacting with air.

It can be understood that the metal resistance of the RFID tag antenna is the same, the RFID tag antenna forms a radiation part through a copper sheet on a substrate, a metal object is used as a reflection part, and energy radiated by the radiation part is reflected by the reflection part and then superposed, so that the gain of the RFID tag antenna is improved, and the identification distance of the RFID tag antenna is greatly increased. When the RFID tag antenna is attached to a metal object (such as a fixing part like a nut), the reflection part can shield the influence of a metal part on one side of the reflection part, so that the identification distance is further increased, and the metal resistance effect is achieved.

During installation, as shown in fig. 2, the RFID temperature measurement tag 1 is tightly attached to one side, having metal, of the insulating plug 2, the RFID tag chip faces the insulating plug 2, the center of the mounting hole at the center of the RFID temperature measurement tag 1 and the center of the metal ring of the insulating plug 2 are the same point, the flat pad 5, the elastic pad 4 and the nut 3 are sequentially placed in the bolt 6 to be screwed, and then the insulating plug 2 and the RFID temperature measurement tag 1 are placed in the sleeve to be screwed with the bolt 6. At this point, the cable joint installation is finished.

After the cable joint is provided with the RFID temperature measurement label 1, a reader-writer antenna can be externally connected with an RFID reader-writer, and the antenna transmits radio frequency signals to supply power to the RFID temperature measurement label 1 and transmit data, so that the temperature of the RFID temperature measurement label 1 is read, and the read temperature is the temperature inside the cable joint because the RFID temperature measurement label 1 is on the insulating plug. Due to the fact that the RFID temperature measurement tag 1 is in a radio frequency technology and does not have a built-in power supply, passive and wireless temperature measurement can be achieved, and theoretically, the RFID temperature measurement tag can be continuously used for more than 10 years. The requirement that products added in a ring main unit, a high-voltage cable branch box and the like for power application cannot be electrified and are not convenient to directly contact for temperature measurement is met.

The utility model discloses must further set up, the built-in 512 bit data memory cell of RFID label chip. The RFID tag chip supports an EPC Global C1G2 communication interface.

In the above technical solution, the RFID tag chip 13 obtains energy through an RF electromagnetic wave of 840MHz to 960MHz by using an advanced ultra high frequency radio wave energy collection technology, and a 512-bit data storage unit is built in to store data such as user information.

It can be understood that the signal of the built-in temperature sensor of the RFID tag chip 103 is read nonlinearly, and the back-end number can be quickly linearized according to preset parameters, thereby facilitating the conversion between the read-out original temperature data and the temperature in degrees centigrade (fahrenheit). The chip supports EPC Global C1G2 v1.2 communication interface, and the matching of various UHF RFID read-write equipment can support a user to very conveniently build a passive wireless temperature sensing system within a range of 10 meters. When the antenna is matched with an RFID label to work, the reading sensitivity can reach about-18.7 dBm.

The utility model discloses do not restrict overall dimension size and material, only show that the label form is the annular object with this example. The shape of the copper sheet on the surface of the RFID tag antenna is not limited, and can be in various modes, but the shape of the copper sheet determines that the copper sheet has metal resistance, namely, the RFID test tag 1 has better sensitivity on the metal surface than the RFID test tag 1 not tested on the metal surface.

Furthermore, a special antenna design simulation software is utilized to model a model of an application scheme, main parameters such as dielectric constants, sizes and the like of various components of the cable joint are substituted into the software, a model which is almost the same as a real object diagram is designed, then the RFID tag antenna is designed according to the model, and the optimal impedance matching of the RFID tag antenna near 915MHz is simulated.

Further, as can be seen from the RFID tag reading distance formula (1), the identification distance r is mainly determined by the gain Gt and the transmission coefficient τ of the tag antenna under the condition that Pt and Gr are constant. The impedance matching between the RFID tag antenna and the RFID tag chip directly affects the transmission coefficient τ. The transmission coefficient of the antenna is improved by matching the width and the circumference of the copper bar radiation part with the impedance of the RFID label chip connected to the feed part, so that the identification distance of the RFID label antenna is improved.

Furthermore, the thickness of the substrate can be increased to enable the energy reflected by the reflection part and the energy reflected by the radiation part to be further superposed at a remote position to improve the gain of the antenna so as to obtain a longer identification distance.

Wherein Pt is the minimum touch threshold work of the RFID label chip;

gr is a gain parameter related to the card reader;

the embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments, including the components, without departing from the principles and spirit of the invention, and still fall within the scope of the invention.

Claims

1. The utility model provides a cable joint temperature measurement structure based on RFID temperature measurement label, a serial communication port, including RFID temperature measurement label, insulating end cap and cable joint, be equipped with temperature measurement spread groove and connecting piece in the cable joint, be provided with the bolt on the connecting piece, the bolt is located the temperature measurement spread groove, install flat pad, bullet pad and nut on the bolt, insulating end cap one side is equipped with the becket, RFID temperature measurement label one side pastes tight becket, insulating end cap stopper is tight to the temperature measurement spread groove, the becket outer wall cladding has the silica gel cover.

2. The RFID temperature measurement tag-based cable joint temperature measurement structure of claim 1, wherein an annular groove is formed at one end of the insulation plug, and the metal ring is sleeved in the annular groove.

3. The cable joint temperature measurement structure based on the RFID temperature measurement tag according to claim 1, wherein a groove is formed at one end of the insulating plug, and the groove is matched with the outer wall of the nut.

4. The cable joint temperature measurement structure based on the RFID temperature measurement tag according to claim 1, wherein the RFID temperature measurement tag comprises an RFID tag antenna and an RFID tag chip, the RFID tag antenna comprises a substrate and a copper sheet, the substrate is in a ring or semi-ring structure, the copper sheet is attached to the surface of the substrate, and the RFID tag chip is respectively connected with the capacitive coupling poles at two ends of the RFID tag antenna.

5. The cable joint temperature measurement structure based on the RFID temperature measurement label according to claim 4, wherein the RFID temperature measurement label is sleeved on the annular groove.

6. The RFID thermometric tag-based cable joint thermometric structure according to claim 4, wherein the substrate is made of FR-4 epoxy glass fiber.

7. The RFID temperature measurement label-based cable joint temperature measurement structure according to claim 4, wherein a protective ink layer is coated on the copper sheet.

8. The RFID thermometric tag-based cable joint thermometry structure according to claim 4, wherein the RFID tag chip supports EPC Global C1G2 communication interface.

9. The cable joint temperature measurement structure based on the RFID temperature measurement tag according to claim 1, wherein a holding part is arranged at the other end of the insulating plug.