CN113847994A - Passive wireless temperature monitoring system - Google Patents
Passive wireless temperature monitoring system Download PDFInfo
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- CN113847994A CN113847994A CN202111033013.5A CN202111033013A CN113847994A CN 113847994 A CN113847994 A CN 113847994A CN 202111033013 A CN202111033013 A CN 202111033013A CN 113847994 A CN113847994 A CN 113847994A
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- 241000722921 Tulipa gesneriana Species 0.000 claims description 14
- 238000009529 body temperature measurement Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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Abstract
The invention provides a passive wireless temperature monitoring system which comprises a plurality of passive wireless temperature sensors, at least one card reader antenna and at least one collector, wherein each temperature sensor is provided with an address storage area for storing a sensor address, the card reader antenna distinguishes different temperature sensors by reading the address storage areas of the temperature sensors, the collector is connected with a communication manager, and the communication manager is provided with a plurality of downlink communication interfaces and a plurality of uplink communication interfaces so as to transmit temperature data sent by the collectors to various uplink devices/platforms in various communication modes. This scheme provides a complete temperature monitoring system, can provide temperature monitoring data for the user with multiple mode, and the user of being convenient for carries out clear and comprehensive remote temperature monitoring to the electric power scene.
Description
Technical Field
The invention belongs to the technical field of power field temperature monitoring, and particularly relates to a passive wireless temperature monitoring system.
Background
In an electric power system, the electrical contacts of primary equipment, such as moving and static contacts, cable lap joints, bus joints and the like, have overhigh temperature rise and frequent occurrence of heating accidents due to poor contact, current overload and other factors, seriously affect the economic benefit and the service quality of the electric power system, and reduce the use safety and the operation reliability of the primary equipment.
Therefore, it is necessary to monitor the temperature of the electrical contact of the primary equipment on line during the operation of the electrical equipment. The temperature is monitored on line, hidden dangers can be found in time, maintenance experience is accumulated, and diagnosis and maintenance are really realized.
In order to monitor the temperature of electric power cabinets such as ring main units, people have conducted long-term research and exploration, such as a wireless temperature measurement system disclosed in chinese patent application No.: 2020217559358], comprising at least one passive RFID temperature sensor, a radio frequency module, a data acquisition module and a user terminal, wherein the radio frequency module is electrically connected with the data acquisition module and is in communication connection with the passive RFID temperature sensor; the data acquisition module sends a temperature measurement instruction to each passive RFID temperature sensor through a radio frequency module and sends a radio frequency signal of energy required for temperature measurement to each passive RFID temperature sensor; each passive RFID temperature sensor is used for measuring temperature data of a corresponding measured point and sending the temperature data to a data acquisition module through the radio frequency module, the data acquisition module is in communication connection with a user terminal, and the data acquisition module receives and processes the temperature data and uploads the temperature data to the user terminal.
According to the scheme, wireless transmission of temperature detection is realized, cables do not need to be arranged in the temperature detection process, the influence of electrical equipment on the temperature detection precision is reduced, the temperature detection cost is reduced, and the temperature detection precision is improved. However, the above scheme still has some defects, the temperature data acquired by the above scheme can only be transmitted to the user terminal, if local display cannot be realized, field workers cannot directly acquire the temperature data locally, and a background monitoring system is not provided, so that the user can only acquire the local temperature data at the user terminal in a wireless network manner, and the user is highly dependent on the network.
In addition, in the prior art, only limited temperature sensors are usually arranged in an electric power cabinet, and the omnibearing temperature monitoring of the electric power cabinet cannot be realized. And corresponding sensors are not used in one electric power cabinet according to the characteristics of all temperature measuring points, and the installation effect and the temperature measuring effect of all temperature sensors are limited.
Disclosure of Invention
The invention aims to solve the problems and provides a passive wireless temperature monitoring system.
The passive wireless temperature monitoring system is characterized in that each temperature sensor is provided with an address storage area for storing the address of the sensor, the card reader antenna distinguishes different temperature sensors by reading the address storage area of each temperature sensor, the collector is connected with a communication manager, and the communication manager is provided with a plurality of downlink communication interfaces and a plurality of uplink communication interfaces so as to transmit temperature data sent by the collectors to various uplink devices/platforms in various communication modes.
In the passive wireless temperature monitoring system, the communication manager is respectively in wired connection with the monitoring background, the local display screen and in wireless connection with the Internet of things platform through each uplink communication interface.
In the passive wireless temperature monitoring system, the collector is connected to the communication manager through an RS485 cable;
or the collector is connected to the wireless receiver in a medium-short distance wireless communication mode, and the wireless receiver is connected to the communication manager through an RS485 cable;
the card reader antenna is connected to the collector through a radio frequency cable;
the communication management machine is connected with the monitoring background through the Ethernet, connected with the local display screen through an RS485 cable and connected with the Internet of things platform through a wireless network.
In the passive wireless temperature monitoring system, the card reader antenna comprises an antenna shell and an antenna body located in the antenna shell, the antenna shell comprises a shell base, a shell cover and a mounting structure used for mounting the card reader antenna to a target position, a radio frequency cable wire passing port is formed in the shell base, one end of the antenna with a radio frequency cable is connected to the antenna body, and the other end of the antenna penetrates through the radio frequency cable wire passing port to the outer side of the antenna shell.
In foretell wireless temperature monitoring system, mounting structure including being located the shell base bottom and the draw-in groove that constitutes by the rectangular channel of a plurality of annular circumference arrangements all inlays in every rectangular channel and is equipped with a magnetism and inhale the structure, the card reader antenna inhale the mode through this magnetism and inhale the electric power cabinet inner wall with magnetism.
In the passive wireless temperature monitoring system, the temperature sensor comprises a nut type sensor for measuring the temperature of the T-shaped head cable connecting part;
and the nut type sensor comprises a nut body with a mounting groove formed in the side wall, a groove cover is embedded in the mounting groove, and a containing groove for containing the sensor body is formed in the groove cover.
In the passive wireless temperature monitoring system, the accommodating groove is formed in one surface of the groove cover close to the bottom wall of the mounting groove so that the sensor body is in contact with the nut body;
the sensor body is placed or fixed in the containing groove; or the sensor body is fixed in the mounting groove; or, the one side that the sensor body is close to the mounting groove diapire is fixed on the mounting groove diapire, and the one side that is close to the storage tank diapire is fixed on the storage tank diapire.
In foretell passive wireless temperature monitoring system, the mounting groove include radial groove and axial groove, and radial groove and axial groove constitute cruciform structure, the capping inlay simultaneously and establish axial groove and radial groove in, it is right to be in order to be right by cruciform structure's mounting groove the capping carries out axial and radial spacing.
In the passive wireless temperature monitoring system, the temperature sensor further comprises a moving contact sensor structure installed on the quincuncial moving contact, one end, far away from the fixed contact, of at least one quincuncial contact finger of the quincuncial moving contact is provided with a mounting platform so as to form a sensor mounting support by the mounting platform and the corresponding quincuncial contact finger, and the moving contact sensor structure is fixedly installed on the mounting platform.
In the passive wireless temperature monitoring system, the moving contact sensor structure comprises a sensor shell and a sensor body, one surface of the sensor shell, which is close to the mounting platform, is provided with an embedded groove matched with the sensor body, the sensor body is embedded in the embedded groove, and the sensor shell is fixed on the mounting platform in a threaded connection mode.
The invention has the advantages that:
1. the complete temperature monitoring system is provided, temperature monitoring data can be provided for users in various modes, and the users can conveniently and clearly and comprehensively monitor the remote temperature of the power site;
2. the temperature data in each electric power cabinet can be collected to a wireless receiver in a medium-short distance wireless mode, and then sent to various uplink devices/platforms through a communication manager, a collector does not need to be led out from the electric power cabinet to a terminal of the communication manager, and circuit arrangement is simplified;
3. the method comprises the following steps that sensors of corresponding types are adopted according to the requirements of all temperature measuring points, temperature sensors are arranged in each area needing temperature measurement in the electric power cabinet, more comprehensive and more detailed temperature monitoring of the electric power cabinet is achieved, each temperature sensor is provided with an independent area for storing sensor addresses, different temperature sensors are distinguished by reading the area through a card reader antenna, the number of temperature measuring points larger than 1000 can be achieved through one card reader antenna, and therefore only one card reader antenna needs to be used in one electric power cabinet;
4. the card reader antenna has the characteristics of simple structure and convenience in installation, can be installed on the inner wall of the electric power cabinet in a magnetic attraction manner, is very convenient and quick to install, and can be adjusted in position freely as required;
5. the nut type sensor is provided with the slot cover, so that the effects of protection, water resistance, dust prevention and the like are achieved on the sensor body; the nut type sensor can be mounted in the mounting groove of the nut without fixing modes such as welding, splicing and the like, and the wireless temperature sensor is replaced without dismounting the nut type sensor, so that the nut type sensor is convenient to dismount and mount, and has higher practicability; the groove cover is matched with the nut body, so that the installation effect is better, the sensor body can be stably installed on the nut body, and the monitoring effect can be ensured;
6. temperature monitoring to the moving contact in the electric power cabinet adopts unique monitoring structure, temperature sensor's installing support and one or more of moving contact itself contact and indicate to close as an organic wholely, need not additionally to arrange the installing support, and can be with the installing support of the mode installation temperature sensor who touches and indicate, can effectively guarantee the stability and the steadiness of installing support, the vibration that the assurance can not appear producing because of the divide-shut brake leads to the temperature measurement part to break away from or skew problem, because this scheme combines together installing support and touch and indicate, temperature sensor direct contact is in the source that generates heat, so have the accuracy that can enough guarantee temperature data, can guarantee the effect of installation intensity again.
Drawings
FIG. 1 is a block diagram of a system architecture of a passive wireless temperature monitoring system according to the present invention;
FIG. 2 is a block diagram of another system configuration of the passive wireless temperature monitoring system of the present invention;
FIG. 3 is a schematic structural diagram of a card reader antenna in the passive wireless temperature monitoring system according to the present invention;
FIG. 4 is a schematic view of another structure of a card reader antenna in the passive wireless temperature monitoring system according to the present invention;
FIG. 5 is a schematic view of the reader antenna of FIG. 4 shown with the housing cover open;
FIG. 6 is a schematic structural diagram of a base of the antenna housing of the card reader of FIG. 5;
FIG. 7 is a schematic structural diagram of a nut-type sensor in the passive wireless temperature monitoring system according to the present invention;
FIG. 8 is a schematic structural diagram of a nut body in the passive wireless temperature monitoring system according to the present invention;
FIG. 9 is a schematic view of the construction of a nut-type sensor slot cover according to the present invention;
FIG. 10 is a schematic view of a sensor body embedded in a nut-type sensor slot cover according to the present invention;
FIG. 11 is a schematic view of the construction of a nut-type sensor slot cover according to the present invention;
fig. 12 is a schematic structural diagram of a quincunx moving contact with a moving contact sensor structure installed in the passive wireless temperature monitoring system of the present invention;
fig. 13 is a schematic view of the mounting bracket of the passive wireless temperature monitoring system of the present invention, which is provided with a movable contact sensor structure, mounted on a movable contact;
FIG. 14 is a schematic view of the mounting of a sensor mounting bracket for temperature measurement of a movable contact and the structure of the movable contact sensor in the passive wireless temperature monitoring system according to the present invention;
FIG. 15 is a schematic view of the positions of a mounting bracket and a sensor body in the passive wireless temperature monitoring system of the present invention;
fig. 16 is a schematic view illustrating the installation of the sensor housing and the sensor body of the sensor mounting bracket in the passive wireless temperature monitoring system according to the present invention.
Reference numerals: a temperature sensor 1; a card reader antenna 2; an antenna housing 21; a housing base 22; a housing cover 23; a mounting structure 24; the antenna is provided with a radio frequency cable 25; a magnetic attraction structure 26; a card slot 27; a collector 31; a communication manager 32; a monitoring back-office 33; a local display screen 34; an internet of things platform 35; a wireless receiver 36; a mobile phone APP 37; a client 38; a nut body 4; a mounting groove 41; a slot cover 42; a receiving groove 43; a sensor body 44; an axial slot 46; a radial groove 45; a plum blossom moving contact 5; a plum-blossom-shaped contact finger 51; a mounting platform 52; a sensor mounting bracket 53; a sensor housing 54; a caulking groove 55; a movable contact sensor structure 56.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example one
As shown in fig. 1, the present embodiment provides a passive wireless temperature monitoring system, which includes at least one passive wireless temperature sensor 1, at least one card reader antenna 2, and at least one collector 31, where the temperature sensor 1 mainly includes a passive wireless sensor body 44 based on an RFID radio frequency technology, and the sensor body 44 can perform radio frequency communication with the card reader antenna 2 and obtain energy for temperature measurement from a radio frequency signal sent from the card reader antenna 2. And each temperature sensor 1 is provided with an address storage area for storing a sensor address, the card reader antenna 2 distinguishes different temperature sensors 1 by reading the address storage area of each temperature sensor 1, and the EPC distinguishes the sensors, so that multipoint temperature measurement can be realized.
Collector 31 is connected with communication manager 32, and communication manager 32 has a plurality of downstream communication interfaces and a plurality of communication interface that goes up in order to transmit the temperature data that a plurality of collectors 31 sent to various upstream equipment/platforms with multiple communication mode, for example monitoring backstage 33, thing networking platform 35 and local display 34, and wherein thing networking platform 35 is used for supplying clients such as client 38, cell-phone APP 37, monitoring backstage 33 to connect.
Specifically, as shown in fig. 1, the collector 31 is connected to the communication manager 32 through an RS485 cable; alternatively, as shown in fig. 2, the collector 31 is connected to the wireless receiver 36 through 433MHz wireless communication or other medium-short distance wireless communication, and the wireless receiver 36 is connected to the communication manager 32 through an RS485 cable. In the second scheme, the main body part of the system is installed in the electric power cabinet, the temperature data of the electric power cabinet is transmitted to the outside in a medium-short distance wireless communication mode, then the temperature data is transmitted to various terminals and platforms in the outside in various communication modes, the temperature data can be acquired without leading out cables from the electric power cabinet, circuits are simplified and arranged, and messy circuits are avoided. The electric power cabinet can be an electric power cabinet such as a ring main unit, a middle-placed main unit and the like.
Specifically, the card reader antenna 2 is connected to the collector 31 through a radio frequency cable; the communication manager 32 is connected to the monitoring background 33 through the ethernet, connected to the local display 34 through an RS485 cable, and connected to the INTERNET of things platform 35 through a wireless network, such as 3G, 4G, NB-IOT, INTERNET, and the like.
When the temperature measuring device is put into use, a collector 31 and a card reader antenna 2 can be arranged in each power cabinet, then a corresponding temperature sensor is arranged at each position in the power cabinet where temperature measurement is needed, for example, a nut-type sensor is arranged at a T-shaped head cable connecting part, a corresponding sensor is arranged on a moving contact, a watchband-type sensor is arranged at a three-phase cable and a static contact, and a rectangular sensor is arranged at a bus duct cable lap joint. Each temperature sensor is communicated with the card reader antenna 2 through radio frequency signals of 840MHz-960MHz frequency band, and the working process is as follows: the collector 31 transmits radio frequency signals of 840MHz-960MHz frequency band to the temperature sensor 1 through the card reader antenna 2, the temperature sensor 1 starts to work to collect temperature data after receiving radio frequency energy, the temperature data is transmitted back to the card reader antenna 2 through the radio frequency signals of 840MHz-960MHz frequency band after the temperature collection is finished, the card reader antenna 2 transmits the temperature data to the collector 31 through a radio frequency cable, and the collector 31 transmits the temperature data to each uplink device/platform through the communication manager 32.
The internet of things platform 35 can monitor each temperature monitoring point through each temperature sensor, and when the temperature continuous set time of the temperature monitoring points exceeds the corresponding temperature threshold value, the internet of things platform gives an alarm to the corresponding connected user end, such as the monitoring background 33, and is used for monitoring the temperature difference of the three-phase cable, and giving an alarm when the temperature difference exceeds the set value.
Further, as shown in fig. 3-6, the card reader antenna 2 includes an antenna housing 21 and an antenna body 28 located in the antenna housing 21, and the antenna housing 21 includes a housing base 22, a housing cover 23 and a mounting structure 24 for mounting the card reader antenna 2 to a target position, a radio frequency cable through opening is opened on the housing base 22, one end of the antenna with the radio frequency cable 25 is connected to the antenna body 28, and the other end of the antenna passes through the radio frequency cable through opening to the outside of the antenna housing 21. The casing base 22 and the casing cover 23 are connected with each other through a bolt connection mode, the antenna body 28 is fixed in the casing base 22 through a bolt connection mode, one end of the antenna, which is far away from the antenna body 28, of the radio-frequency cable 25 is provided with a threaded connector, and when the antenna is put into use, the external radio-frequency cable only needs to be connected with one end of the threaded connector of the radio-frequency cable 25 in a threaded mode.
Specifically, the mounting structure 24 includes a slot 27 located at the bottom of the housing base 22, and a magnetic attraction structure 26 is embedded in the slot 27. And the card slot 27 of this embodiment includes a plurality of rectangular grooves of annular circumference range, inlays in every rectangular groove and is equipped with a magnetism and inhale structure 26, and the card reader antenna 2 is inhaled the mode through magnetism and is adsorbed in electric power cabinet inner wall with magnetism through inhaling structure 26. The user can install and adjust the position wantonly as required.
Further, the housing base 23 of the card reader antenna 2 is further provided with mounting arms extending towards two sides, and the mounting arms are provided with mounting grooves and mounting holes, so that the card reader antenna 2 can be mounted on any occasions, and the mounting adaptability of the card reader antenna 2 is improved.
Further, in this embodiment, the collector 31 preferably has a guide bar at the rear side, and a guide rail adapted to the guide bar is fixedly installed on the inner wall of the electric power cabinet, so that the collector 31 is installed on the inner wall of the electric power cabinet in a guide rail type installation manner. The collector 31 is connected with the antenna body 28 through an external radio frequency cable to transmit a radio frequency signal to be transmitted to the temperature sensor 1 to the card reader antenna 2 and to transmit the radio frequency signal to the temperature sensor 1 through the card reader antenna 2.
Specifically, the temperature sensor 1 of this scheme includes a nut type sensor for measuring the temperature of the T-head cable connection portion. As shown in fig. 7, the nut type sensor includes a nut body 4 and a slot cover 42, a mounting groove 41 is opened on a side wall of the nut body 4, the slot cover 42 is embedded in the mounting groove 41, and an accommodating groove 43 for accommodating the sensor body 44 is opened on a side of the slot cover 42 close to a bottom wall of the mounting groove 41, so that when the nut body 4 is put into use, the sensor body 44 can contact the nut body 4, heat generated on a cable is rapidly transferred to the wireless temperature sensor 3 for measurement, and timely and accurate temperature monitoring can be ensured.
This scheme is preferred to directly place sensor body 44 in storage tank 43 or fix in storage tank 43 through the adhesive bonding mode, when needs change or during work such as maintenance to sensor body 44, directly pull down capping 42 can, need not to dismantle the nut body, have advantages such as convenient operation.
In addition, due to the existence of the slot cover 42, the sensor body 44 with more sizes can be adapted to the most convenient embedding mode. If the height of the receiving groove 43 is equal to the highest height of the sensor body 44, the height of the receiving groove may be lower or higher than the highest height of the sensor body 44, and the height difference between the two is set within a set range, such as within 0.5cm, for the sake of installation stability, adaptability and accuracy of temperature monitoring. It is preferable that the height of the receiving groove 43 is slightly greater than or equal to the highest height of the sensor body 44. The width of the receiving groove 43 may be greater than or equal to the maximum width of the sensor body 44, and the length of the receiving groove 43 may be greater than or equal to the maximum length of the sensor body 44. In practical applications, most of the sensor bodies 44 are rectangular, some of the sensor bodies 44 are non-rectangular, and the accommodating groove 43 is rectangular, so that the maximum height, the maximum width and the maximum length of the sensor bodies 44 are taken as the reference here, and if the sensor bodies 44 are rectangular, the height, the width and the length of the sensor bodies 44 are taken as the reference directly, at this time, when the height of the accommodating groove 43 is equal to the height of the sensor bodies 44, the width of the accommodating groove 43 is equal to the width of the sensor bodies 44, and the length of the accommodating groove 43 is equal to the length of the sensor bodies 44, the sensor bodies 44 can be inserted into the accommodating groove 43 just in a manner of filling the accommodating groove 43.
Preferably, as shown in fig. 8, the mounting groove 41 includes a radial groove 45 and an axial groove 46, and the radial groove 45 and the axial groove 11 form a cross-shaped structure. As shown in fig. 9-11, the structure of the slot cover 42 is adapted to the cross structure, and the mounting slot 41 of the cross structure axially and radially limits the slot cover 42.
In this embodiment, it is preferable that the overall size of the slot cover 42 is adapted to the size of the mounting slot 41, so that the slot cover 42 and the nut body 4 can form a complete nut structure in appearance. In practice, it is not limited to a complete fit, for example, in the axial direction of the nut body 4, the mounting groove 41 is adapted to the dimensions of the groove cover 42 so that the groove cover 42 can be inserted into the mounting groove 41, while in the radial direction of the nut body 4, the length of the groove cover 42 may be equal to, greater than or less than the rectangular structural length of the mounting groove 41.
When the sensor body 44 is put into use, the sensor body 44 is directly put into the containing groove 43 of the slot cover 42, then the slot cover 42 is embedded into the mounting groove 41, and when the sensor body 44 needs to be replaced, the slot cover 42 is taken down to replace another slot cover 42 provided with the sensor body 44. And when the sensor body 44 is only placed in the slot receiving slot 43, the sensor body 44 in the slot cover 42 can be taken down, and the sensor body 44 is placed in the slot 43 of the slot cover 42 to re-insert the slot cover 42 into the mounting slot 41.
In addition, in practical application, the present solution does not exclude that the sensor body 44 is fixed in the accommodating groove 43 by means of adhesive or the like, or that the sensor body 44 is fixed in the accommodating groove 43 first by means of adhesive or the like, and then when the groove cover 42 is covered in the mounting groove 41, the surface of the temperature sensor 3 close to the bottom wall of the mounting groove 41 is fixed on the bottom wall of the mounting groove 41 by means of adhesive or the like.
Further, as shown in fig. 12 to 15, the temperature sensor 1 of the present solution further includes a movable contact sensor structure 56 installed on the tulip movable contact 5 for performing accurate temperature measurement on the tulip movable contact 5. The specific mode is that one end of one of the quincunx contact fingers 51 of the quincunx moving contact 5, which is far away from the fixed contact, is provided with a mounting platform 52, the mounting platform 52 and the corresponding quincunx contact finger 51 form a sensor mounting bracket 53, and a moving contact sensor structure 56 is fixedly mounted on the mounting platform 52.
Preferably, the sensor mounting bracket 53 formed by the mounting platform 52 and the corresponding tulip contact finger 51 is of an integrally formed structure. The sensor mounting bracket 53 is made of pure copper, and the main body material of the silver plating layer plated on the surface of the sensor mounting bracket 53 is pure copper and silver plated on the surface, so that the conductivity of the moving contact is not affected completely. The idea of this scheme is to replace original a slice plum blossom contact finger of plum blossom moving contact 5 with the sensor installing support, except that mounting platform 52 part, all the other parts are the same with the plum blossom contact finger, with this sensor installing support 53 of original plum blossom contact finger's fixed mode installation can, fixed very reliable, can not lead to temperature measurement component to break away from or skew because of the vibration that divide-shut brake produced. And this scheme is only with one slice plum blossom among them to touch the sensor installing support of the finger change this scheme, and the concrete mounted position of sensor installing support is also unrestricted, can install the mounted position that touches the finger at arbitrary original plum blossom, so the production assembly methods of plum blossom moving contact are the same with original mounting methods completely, can not improve the complexity of contact production process. In addition, the scheme integrates the rest of the contact fingers of the temperature sensor mounting bracket 53 into a whole in effect, the mounting bracket does not need to be additionally arranged, and the effects of ensuring the measurement accuracy of temperature data and ensuring the mounting strength can be realized.
Specifically, the movable contact sensor structure 56 includes a sensor housing 54 and a sensor body 44 positioned within the sensor housing 54. Specifically, the sensor housing 54 is secured to the mounting platform 52 by a threaded connection. In this embodiment, two through holes are formed in the diagonal line of the mounting platform 52, two threaded holes are formed in the diagonal line of the sensor shell 54 close to one surface of the mounting platform 52, so that the sensor shell 54 is directly placed on the mounting platform 21, then the movable contact sensor structure 56 can be mounted by screwing bolts into the two threaded holes respectively corresponding to the two through holes one by one, and the mounting is very convenient and fast.
Preferably, as shown in fig. 16, one surface of the sensor housing 54 close to the mounting platform 52 is provided with a caulking groove 55 adapted to the sensor body 44, and the sensor body 44 is embedded in the caulking groove 55 so that the sensor body 44 directly contacts with the mounting platform 52 and the heat source, thereby effectively ensuring the accuracy of the temperature data.
The sensor body 44 for the temperature sensor on the moving contact can be placed directly in the nest 55 and the sensor housing 54 with the sensor body 44 mounted thereto is then secured to the mounting platform 52. The sensor body 44 may be fixed to the mounting platform 52 by means of adhesive or threads, and then the caulking groove 55 of the sensor housing 54 is aligned with the sensor body 44 and covered on the mounting platform 52, and then the sensor housing 54 is fixed by bolts.
According to the scheme, different temperature sensors are adopted for different temperature measuring points, all-dimensional temperature monitoring of the electric power cabinet is achieved, and meanwhile, the temperature sensors used by the temperature measuring points are correspondingly improved according to the characteristics of the temperature measuring points, so that the optimal temperature measuring effect and the optimal installation effect of each temperature measuring point are guaranteed.
Example two
The present embodiment is similar to the present embodiment, and the difference is that an end of the two tulip contact fingers 51 of the tulip contact 5 of the present embodiment, which is far away from the stationary contact, is provided with an installation platform 52, and the installation platforms 52 of the two tulip contact fingers 51 are in an integrally formed structure, so that the two tulip contact fingers 51 and the installation platform 52 form a sensor installation support 53. That is, the sensor mounting bracket 53 of this embodiment occupies two tulip contact finger mounting positions of the tulip contact 1, and compared with the first embodiment, this embodiment can mount the moving contact sensor structure 56 with a large volume. The person skilled in the art can finally determine to adopt the structure in the first embodiment or the structure in the present embodiment according to the size of the tulip moving contact 5 and the size of the selected moving contact sensor structure 56.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although temperature sensor 1 is used more herein; a card reader antenna 2; an antenna housing 21; a housing base 22; a housing cover 23; a mounting structure 24; the antenna is provided with a radio frequency cable 25; a magnetic attraction structure 26; a card slot 27; a collector 31; a communication manager 32; a monitoring back-office 33; a local display screen 34; an internet of things platform 35; a wireless receiver 36; a mobile phone APP 37; a client 38; a nut body 4; a mounting groove 41; a slot cover 42; a receiving groove 43; a sensor body 44; an axial slot 46; a radial groove 45; a plum blossom moving contact 5; a plum-blossom-shaped contact finger 51; a mounting platform 52; a sensor mounting bracket 53; a sensor housing 54; a caulking groove 55; movable contact sensor structure 56, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. A passive wireless temperature monitoring system comprises a plurality of passive wireless temperature sensors (1), at least one card reader antenna (2) and at least one collector (31), and is characterized in that each temperature sensor (1) is provided with an address storage area for storing a sensor address, the card reader antenna (2) distinguishes different temperature sensors (1) by reading the address storage area of each temperature sensor (1), the collector (31) is connected with a communication manager (32), and the communication manager (32) is provided with a plurality of downlink communication interfaces and a plurality of uplink communication interfaces so as to transmit temperature data sent by the collectors (31) to various uplink devices/platforms in a plurality of communication modes.
2. The passive wireless temperature monitoring system according to claim 1, wherein the communication manager (32) is respectively connected to the monitoring background (33), the local display screen (34) and the internet of things platform (35) in a wired manner through uplink communication interfaces.
3. The passive wireless temperature monitoring system according to claim 2, wherein the collector (31) is connected to the communication manager (32) through an RS485 cable;
or the collector (31) is connected to the wireless receiver (36) in a medium-short distance wireless communication mode, and the wireless receiver (36) is connected to the communication manager (32) through an RS485 cable;
the card reader antenna (2) is connected to the collector (31) through a radio frequency cable (25);
the communication management machine (32) is connected with the monitoring background (33) through the Ethernet, connected with the local display screen (34) through an RS485 cable, and connected with the Internet of things platform (35) through a wireless network.
4. The passive wireless temperature monitoring system according to claim 3, wherein the card reader antenna (2) comprises an antenna housing (21) and an antenna body (28) located in the antenna housing (21), the antenna housing (21) comprises a housing base (22), a housing cover (23) and a mounting structure (24) for mounting the card reader antenna (2) to a target position, the housing base (22) is provided with a radio frequency cable through port, one end of the antenna with a radio frequency cable (25) is connected to the antenna body (28), and the other end of the antenna passes through the radio frequency cable through port to the outside of the antenna housing (21).
5. The passive wireless temperature monitoring system according to claim 4, wherein the mounting structure (24) includes a slot (27) located at the bottom of the housing base (22) and formed by a plurality of rectangular grooves arranged circumferentially in a ring shape, a magnetic attraction structure (26) is embedded in each rectangular groove, and the card reader antenna (2) is attracted to the inner wall of the power cabinet in a magnetic attraction manner through the magnetic attraction structure (26).
6. The passive wireless temperature monitoring system according to claim 4, wherein the temperature sensor (1) comprises a nut-type sensor for measuring the temperature of the T-head cable connection;
the nut type sensor comprises a nut body (4) with a mounting groove (41) formed in the side wall, a groove cover (42) is embedded in the mounting groove (41), and a containing groove (43) used for containing a sensor body (44) is formed in the groove cover (42).
7. The passive wireless temperature monitoring system according to claim 6, wherein the accommodating groove (43) is formed on one surface of the groove cover (42) close to the bottom wall of the installation groove (41) so that the sensor body (44) is contacted with the nut body (4);
the sensor body (44) is placed or fixed in the containing groove (43); or the sensor body (44) is fixed in the mounting groove (41); or one surface of the sensor body (44) close to the bottom wall of the mounting groove (41) is fixed on the bottom wall of the mounting groove (41), and one surface close to the bottom wall of the accommodating groove (43) is fixed on the bottom wall of the accommodating groove (43).
8. The passive wireless temperature monitoring system according to claim 7, wherein the mounting groove (41) comprises a radial groove (45) and an axial groove (46), the radial groove (45) and the axial groove (46) form a cross structure, and the groove cover (42) is embedded in the axial groove (46) and the radial groove (45) at the same time so as to limit the groove cover (42) axially and radially through the mounting groove (41) with the cross structure.
9. The passive wireless temperature monitoring system according to claim 4, wherein the temperature sensor (1) further comprises a moving contact sensor structure (56) installed on the tulip moving contact (5), a mounting platform (52) is provided at one end of at least one tulip contact finger (51) of the tulip moving contact (5) far away from the fixed contact, so as to form a sensor mounting bracket (53) by the mounting platform (52) and the corresponding tulip contact finger (51), and the moving contact sensor structure (56) is fixedly installed on the mounting platform (52).
10. The passive wireless temperature monitoring system according to claim 9, wherein the movable contact sensor structure (56) comprises a sensor housing (54) and a sensor body (44), a caulking groove (55) matched with the sensor body (44) is formed in one surface, close to the mounting platform (52), of the sensor housing (54), the sensor body (44) is embedded in the caulking groove (55), and the sensor housing (54) is fixed on the mounting platform (52) in a threaded connection mode.
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| CN202111033013.5A CN113847994A (en) | 2021-09-03 | 2021-09-03 | Passive wireless temperature monitoring system |
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