CN110217261B - Axle temperature monitoring method and system for railway vehicle - Google Patents
Axle temperature monitoring method and system for railway vehicle Download PDFInfo
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- CN110217261B CN110217261B CN201910541571.9A CN201910541571A CN110217261B CN 110217261 B CN110217261 B CN 110217261B CN 201910541571 A CN201910541571 A CN 201910541571A CN 110217261 B CN110217261 B CN 110217261B
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- 230000003044 adaptive effect Effects 0.000 claims description 3
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- 238000009529 body temperature measurement Methods 0.000 abstract description 16
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/04—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault
- B61K9/06—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault by detecting or indicating heat radiation from overheated axles
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisions for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisions for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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Abstract
The embodiment of the invention provides a method and a system for monitoring the axle temperature of a railway vehicle, which relate to the field of axle temperature measurement, and the method for monitoring the axle temperature comprises the following steps: each electronic tag measures and stores the axle temperature of the railway vehicle in which each electronic tag is positioned based on the condition of acquiring electric energy and the corresponding electric energy acquisition time; each electronic tag also stores prestored data including relevant data such as a tag TID/EPC code, temperature calibration data, a shaft number where a tag installation position is located, a bearing position number, an axle model, a bearing model and the like; the electronic tag reader acquires the shaft temperature and the pre-stored data of the railway vehicle where each electronic tag is located, which are stored by each electronic tag; and determining alarm information based on the axle temperature of the railway vehicle, pre-stored data and a preset temperature alarm threshold value of the bearing position number, which are acquired by the electronic tag reader. The invention can reduce the temperature measurement time and accurately monitor the temperature.
Description
Technical Field
The invention relates to the field of axle temperature measurement, in particular to an axle temperature monitoring method and system for railway vehicles.
Background
When the railway vehicle runs rapidly, the hot axle of the vehicle or the hot axle cutting accident can be caused due to the bearing failure and the abnormal high temperature of the bearing. At present, infrared axle temperature detecting systems are widely adopted by freight trains. However, due to the special environment of train operation, the existing infrared axle temperature detection system is often influenced by severe weather, the reliability of axle temperature measurement is greatly influenced, and meanwhile, the operation and maintenance cost is high.
With the rapid development of the RFID technology in recent years, a shaft temperature monitoring mode based on the passive RFID technology is gradually applied. A shaft temperature monitoring mode of a passive RFID technology is designed by adopting a shaft temperature measuring electronic tag based on a 18000-6C protocol. When the electronic tag enters an electromagnetic field of an antenna of an electronic tag reader, the electronic tag can absorb energy in the electromagnetic field to realize power supply, the electronic tag starts shaft temperature measurement after receiving an instruction of the electronic tag reader, and finally measured data and self data are transmitted to the electronic tag reader on the ground.
The existing temperature measurement mode is that after an electronic tag is identified through a multi-tag anti-collision process, the electronic tag is restarted to measure the temperature under the condition of receiving a measurement instruction, the time consumed in the process is long, when a railway vehicle runs at a high speed, the time for the tag to carry out an electromagnetic field region of a reader-writer is extremely short, and more than one electronic tag enters an electromagnetic field at the same time, and the process can possibly cause the problem that the electronic tag cannot transmit measured data and self data to an electronic tag reader after passing through the electromagnetic field.
Disclosure of Invention
The embodiment of the invention aims to provide a method for monitoring the axle temperature of a railway vehicle, which can reduce the time for measuring the temperature and can accurately monitor the temperature.
The invention provides a method for monitoring the axle temperature of railway vehicles, wherein electronic tags capable of measuring the axle temperature are arranged on axles of the railway vehicles, each electronic tag is configured to be capable of acquiring electric energy in an electromagnetic field formed by an adaptive electronic tag reader antenna, when each electronic tag passes through an electromagnetic field area formed by the electronic tag reader antenna, an antenna induction electromagnetic field of each electronic tag generates electric energy to supply power to each electronic tag and activate each electronic tag, each activated electronic tag measures the axle temperature of the axle in which the electronic tag is arranged, and temperature data of the measured axle temperature is stored; in the multi-tag anti-collision process, each electronic tag sends the stored temperature data and pre-stored data pre-stored in each electronic tag to the electronic tag reader, wherein the pre-stored data comprises at least one of the following data: the temperature calibration data of each electronic tag, the tag code of each electronic tag and the position data for marking the installation position of each electronic tag; the electronic tag reader sends the stored temperature data and the pre-stored data to the server; and the server determines alarm information according to the stored temperature data, the prestored data and a preset temperature alarm threshold corresponding to the position data.
Preferably, in the multi-tag anti-collision process, each electronic tag sending the stored temperature data and the pre-stored data pre-stored in each electronic tag to the electronic tag reader includes: after receiving a multi-tag anti-collision algorithm related instruction sent by the electronic tag reader, each electronic tag sends the stored temperature data and the pre-stored data to the electronic tag reader; wherein the instructions related to the multi-label anti-collision algorithm comprise: the method comprises an inventory cycle starting instruction for starting an inventory cycle of the electronic tag, a selection instruction for selecting the electronic tag and a reading instruction for reading temperature data and pre-stored data stored in the electronic tag in a preset protocol.
Preferably, the position data for marking the installation position of the electronic tag includes at least one of: the axle number, the bearing position number, the axle type and the bearing type of the axle where the electronic tag is installed.
Preferably, before each electronic tag transmits the stored temperature data and the pre-stored data pre-stored in each electronic tag to the electronic tag reader, the method further comprises: each electronic tag sequentially encrypts, codes and modulates the stored temperature data and the pre-stored data to obtain a data packet; and after each electronic tag sends the stored temperature data and the pre-stored data pre-stored in each electronic tag to the electronic tag reader, the method further comprises the following steps: and the electronic tag reader demodulates, decodes and decrypts the data packet respectively to obtain the stored temperature data and prestored data.
In addition, the present invention also provides an axle temperature monitoring system for a railway vehicle, the axle temperature monitoring system comprising: each electronic tag is configured on an axle of each railway vehicle, is used for measuring the axle temperature, storing the temperature data of the measured axle temperature and the pre-stored data, and is used for acquiring electric energy in an electromagnetic field formed by an antenna of an electronic tag reader, wherein each electronic tag is also used for generating electric energy by an antenna induction electromagnetic field of each electronic tag when the electronic tag passes through an electromagnetic field area formed by the antenna of the electronic tag reader so as to supply power to each electronic tag and activate each electronic tag, and each activated electronic tag measures the axle temperature of the axle where the electronic tag is located and stores the temperature data of the measured axle temperature; each electronic tag is used for sending the stored temperature data and pre-stored data pre-stored in each electronic tag to the electronic tag reader in the multi-tag anti-collision process, wherein the pre-stored data comprises at least one of the following data: the temperature calibration data of each electronic tag, the tag code of each electronic tag and the position data for marking the installation position of each electronic tag; the electronic tag reader is used for sending the stored temperature data and the pre-stored data to the server; and the server is used for determining alarm information according to the stored temperature data, the prestored data and a preset temperature alarm threshold corresponding to the position data.
Preferably, each electronic tag, configured to send the stored temperature data and the pre-stored data pre-stored in each electronic tag to the electronic tag reader in the multi-tag anti-collision process, includes: each electronic tag is used for sending the stored temperature data and the pre-stored data to the electronic tag reader after receiving a multi-tag anti-collision algorithm related instruction sent by the electronic tag reader; wherein the instructions related to the multi-label anti-collision algorithm comprise: the method comprises an inventory cycle starting instruction for starting an inventory cycle of the electronic tag, a selection instruction for selecting the electronic tag and a reading instruction for reading temperature data and pre-stored data stored in the electronic tag in a preset protocol.
Preferably, the position data for marking the installation position of the electronic tag includes at least one of: the axle number, the bearing position number, the axle type and the bearing type of the axle where the electronic tag is installed.
Preferably, each electronic tag is further configured to encrypt, encode and modulate the stored temperature data and the pre-stored data in sequence to obtain a data packet; and the electronic tag reader is also used for respectively demodulating, decoding and decrypting the data packet to obtain the stored temperature data and the pre-stored data.
Preferably, the electronic tag includes: the bolt is used as an original fastener of a shaft end, is arranged on an axle of the railway vehicle and is used for conducting heat of the axle temperature of the bolt mounting position on the axle to the temperature-sensitive label module; the temperature sensing label module is fixed outside the bolt and used for detecting the shaft temperature conducted by the bolt under the condition of acquiring the electric energy; and the flexible antenna is fixed outside the bolt and used for transmitting electric energy acquired from the magnetic field of the antenna of the electronic tag reader matched with the flexible antenna to the temperature-sensitive tag module and transmitting the shaft temperature and other data detected by the temperature-sensitive tag module to the electronic tag reader.
Preferably, the flexible antenna includes: the bolt comprises a first end face fixed to the outside of the bolt, a second end face arranged at intervals with the first end face, and a connecting part connected to the first end face and the second end face; and, this electronic label still includes: the antenna bracket is arranged between the first end face and the second end face so as to support the first end face and the second end face.
Through the technical scheme, the temperature of the axle can be conducted to the temperature sensing label module of the electronic label through the bolt of the electronic label, so that the electronic label and the axle have good heat conduction paths, the electronic label detects the temperature of the axle in a contact mode, and the temperature of the axle can be accurately measured. The electronic tag reduces the time for receiving the instruction and then measuring the temperature in the temperature measuring process, so that the electronic tag directly sends the measured shaft temperature after receiving the instruction, does not need to remove the time-consuming temperature measurement, quickly returns temperature measurement data and other related data by using a multi-tag anti-collision mechanism, can finish the temperature measurement of a plurality of tags, the temperature measurement data return and the pre-stored data in a short time, thereby meeting the rigorous requirement of measuring the temperature in real time when the vehicle runs at a high speed, and encrypts the data transmitted between the tags and a reader-writer, so that the data transmission is safer and more reliable, finally, the temperature and the heating condition of each bearing can be accurately monitored when the vehicle runs at a high speed, and the alarm is provided for the abnormal temperature rise of the shaft, thereby effectively preventing the abnormal temperature rise and the shaft hot-cutting accident.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a flow chart illustrating a method of monitoring shaft temperature in accordance with the present invention;
FIG. 2 is a block diagram of an electronic tag of the present invention;
FIG. 3 is a schematic structural diagram of an electronic tag according to the present invention;
fig. 4 is a schematic diagram showing a specific structure of the flexible antenna of the present invention; and
fig. 5 is a schematic plan view of a structure of an antenna holder according to the present invention.
Description of the reference numerals
1 electronic tag 2 electronic tag reader
3 server
10 bolt 11 outer hexagonal structure
12-groove 20 flexible antenna
21 first end face 22 connection
23 second end face
30 antenna support 40 temperature sensing label module
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
Before describing the present invention in detail, it is a brief introduction to the shortcomings of the prior art axle temperature monitoring methods for railway vehicles. As background art, the conventional temperature measurement method is to perform temperature measurement by starting the electronic tag identification process after the electronic tag identification process is performed, and then receiving a measurement command, which takes a long time. When a certain electronic tag does not transmit the measured shaft temperature in the magnetic field due to the long process, if the shaft temperature measured by the electronic tag does not exceed the temperature alarm threshold value, the shaft temperature measured by the electronic tag is better than the temperature alarm threshold value, the shaft temperature of the railway vehicle cannot be accurately monitored to exceed the threshold value, and the safety of the railway vehicle cannot be guaranteed.
Based on the above, the following describes in detail the improvements of the present invention.
Example one
FIG. 1 is a flowchart illustrating a method according to a first embodiment. In the first embodiment, each railway vehicle axle is provided with an electronic tag capable of measuring the axle temperature, and each electronic tag is configured to obtain electric energy in the magnetic field of an adaptive ground-mounted electronic tag reader antenna.
As shown in fig. 1, the shaft temperature monitoring method may include:
s110, when each electronic tag passes through an electromagnetic field area formed by an antenna of an electronic tag reader, the antenna of each electronic tag induces an electromagnetic field to generate electric energy to supply power to each electronic tag and activate each electronic tag, and each activated electronic tag measures the shaft temperature of the axle where the electronic tag is located and stores the temperature data of the measured shaft temperature.
The antenna of each electronic tag obtains electric energy to supply power to the temperature sensing tag module of each electronic tag after inducing the electromagnetic field. And when the obtained electric energy reaches the activation threshold, each electronic tag is directly activated and starts to measure the axle temperature of the axle where the electronic tag is located, and the temperature data of the measured axle temperature are stored. In the present embodiment, the axle temperature at the axle end of the axle of the railway vehicle is measured mainly based on the above-described situation of the acquired electric energy and the corresponding electric energy acquisition time.
Further preferably, in order to achieve further acquisition of the shaft temperature, the method may specifically be: under the condition that each electronic tag acquires electric energy, each electronic tag measures the shaft temperature of the axle end of the railway vehicle where each electronic tag is located by taking the electric energy acquisition time as the starting time.
In the above steps, the axle temperature measuring time of each electronic tag is limited. The embodiment directly measures the temperature when the electric energy is obtained, so that the time of the temperature measuring process of receiving the instruction and measuring the temperature is reduced, the measured shaft temperature is directly sent after the instruction is received, and the temperature is measured without consuming time. The axle temperature measurement of the vehicle is satisfied.
S120, in the multi-tag anti-collision process, each electronic tag sends the stored temperature data and pre-stored data pre-stored in each electronic tag to the electronic tag reader, where the pre-stored data includes at least one of: temperature calibration data, a tag code of each electronic tag, and position data for marking the mounting position of the electronic tag.
The electronic tag reader needs to acquire the stored shaft temperature and temperature calibration data, TID/EPC tag codes of the electronic tags, and data (position data) related to the shaft number, bearing position number, axle type, bearing type and the like of the tag installation position from the electronic tags in the multi-tag anti-collision process, so that the temperature can be actually the shaft temperature of the bearing and the types of the shaft and the bearing. Setting and judgment of subsequent alarm threshold values are facilitated. The pre-stored data is data pre-stored in the electronic tags, and each electronic tag stores position data corresponding to the position of the electronic tag, a tag code corresponding to the electronic tag and temperature calibration data corresponding to the temperature calibration of the electronic tag.
The temperature calibration data is used for performing temperature calibration, and since the chips of each electronic tag are different in work, the measured temperatures are different, and the electronic tags need to be calibrated in order to avoid measurement deviation. Through the technical scheme, the temperature data measured by the RFID tag chip in real time is subjected to temperature calibration, so that relatively accurate measured temperature is obtained.
For S120, it is further preferable that each electronic tag sends the stored temperature data and the pre-stored data to the electronic tag reader after receiving a related instruction of the multi-tag anti-collision algorithm sent by the electronic tag reader; wherein the instructions related to the multi-label anti-collision algorithm comprise: the method comprises an inventory cycle starting instruction for starting an inventory cycle of the electronic tag, a selection instruction for selecting the electronic tag and a reading instruction for reading temperature data and pre-stored data stored in the electronic tag in a preset protocol.
The multi-label anti-collision algorithm can be related instructions of the multi-label anti-collision algorithm in the ISO18000-6C protocol. Wherein, the related instruction comprises: the Select instruction is responsible for selecting a tag, and the Query instruction is responsible for starting an inventory cycle. The invention designs an instruction Query _ temp, integrates the functions of a Select instruction and a Query instruction, shortens the time required by the whole multi-label anti-collision algorithm, and can better adapt to vehicles running at high speed. The system is present in a program of the electronic tag reader and is mainly used for identifying each electronic tag communicated with the electronic tag reader, and when one tag is identified, the system receives the shaft temperature and temperature calibration data from the identified electronic tag and the data related to the shaft number, the bearing position number, the axle type, the bearing type and the like of the mounting position of the tag. And each instruction is sent to control each electronic tag to perform corresponding functions, and finally, the shaft temperature and temperature calibration data and the TID/EPC code of the tag stored by all the electronic tags and the related data such as the shaft number, the bearing position number, the axle model, the bearing model and the like of the mounting position of the tag can be obtained.
Further preferably, before each electronic tag sends the stored temperature data and the pre-stored data pre-stored in each electronic tag to the electronic tag reader, each electronic tag encrypts, encodes and modulates the stored temperature data and the pre-stored data in sequence to obtain a data packet.
The step mainly has the function of encrypting the data stored in each electronic tag so as to improve the security of data transmission. The role of coding and modulation is to allow each electronic tag to transmit through the antenna. And finally, sending the temperature calibration data of each electronic tag, the data related to the axle number, the bearing position number, the axle type, the bearing type and the like of the tag installation position and the data of the axle temperature of the railway vehicle in which the electronic tag is installed in a data packet mode.
Further preferably, after each electronic tag sends the stored temperature data and the pre-stored data pre-stored in each electronic tag to the electronic tag reader, the electronic tag reader demodulates, decodes and decrypts the data packet respectively to obtain the stored temperature data and the pre-stored data.
The data packet obtained in real time is the encrypted, encoded and modulated data packet, and in order to further obtain the content in the data packet, the data packet needs to be demodulated, decoded and decrypted to obtain the electronic tag temperature calibration data, the data related to the axle number, the bearing position number, the axle type, the bearing type and the like of the tag installation position and the data of the axle temperature of the railway vehicle. Wherein said demodulating, decoding and decrypting are coordinated with said encrypting, encoding and modulating.
And S130, the server determines alarm information according to the stored temperature data, the pre-stored data and a preset temperature alarm threshold corresponding to the position data.
In S130, since the position of each electronic tag is different, the measured shaft temperature must be different. Therefore, the temperature alarm threshold value can be determined according to the actual axle type, the actual bearing type, the actual axle number and the actual bearing position number, and the temperature alarm threshold value of each bearing position number can be different. The temperature alarm threshold value is set based on each bearing position number, so that temperature alarm can be realized more accurately.
In summary, the first embodiment can measure the temperature after obtaining the electric energy. According to the steps, once the electronic tag reader establishes communication with the electronic tag, the instruction is directly sent through a multi-tag anti-collision algorithm, so that the shaft temperature measured and stored by the electronic tag, the prestored temperature calibration data, the tag TID/EPC code, the shaft number where the tag is installed, the bearing position number, the axle model, the bearing model and other related data are obtained. Compared with the mode of establishing communication and then sending the instruction in the prior art, the method and the device reduce the temperature measurement process, so that the temperature measurement can be carried out before the communication or before the instruction is sent, and unnecessary time waste is reduced. Finally, because the output transmission speed is accelerated, whether the axle temperature of the railway vehicle exceeds the threshold value or not can be monitored more accurately compared with the prior art, and therefore the safety of the railway vehicle is guaranteed.
Example two
FIG. 2 is a block diagram of the modular connections of an axle temperature monitoring system for a railway vehicle.
As shown in fig. 2, the second embodiment provides an axle temperature monitoring system for a railway vehicle, which includes: each electronic tag 1 is configured on an axle of each railway vehicle, and is used for measuring the axle temperature, storing the measured axle temperature data and the pre-stored data, and obtaining electric energy from an electromagnetic field formed by an antenna of an electronic tag reader 2, wherein each electronic tag 1 is also used for inducing an electromagnetic field to generate electric energy to supply power to each electronic tag 1 and activate each electronic tag 1 when the electronic tag 1 passes through an electromagnetic field area formed by the antenna of the electronic tag reader 2, and each activated electronic tag 1 measures the axle temperature of the axle where the electronic tag is located and stores the measured axle temperature data; each electronic tag 1 is configured to send, to the electronic tag reader 2, the stored temperature data and pre-stored data pre-stored in each electronic tag 1 in a multi-tag anti-collision process, where the pre-stored data includes at least one of: temperature calibration data, a tag code of each electronic tag 1, and position data for marking the mounting position of the electronic tag 1; the electronic tag reader 2 is used for sending the stored temperature data and the pre-stored data to the server 3; and the server 3 is used for determining alarm information according to the stored temperature data, the prestored data and a preset temperature alarm threshold corresponding to the position data.
Preferably, each electronic tag 1 is configured to send the stored temperature data and the pre-stored data pre-stored in each electronic tag 1 to the electronic tag reader 2 in the multi-tag anti-collision process, and the method includes: each electronic tag 1 is used for sending the stored temperature data and the pre-stored data to the electronic tag reader 2 after receiving a multi-tag anti-collision algorithm related instruction sent by the electronic tag reader 2; wherein the instructions related to the multi-label anti-collision algorithm comprise: an inventory cycle starting instruction for starting an inventory cycle of the electronic tag 1, a selection instruction for selecting the electronic tag 1, and a reading instruction for reading out temperature data and pre-stored data stored in the electronic tag 1 in a preset protocol.
Preferably, the position data for marking the installation position of the electronic tag 1 includes at least one of: the axle number, the bearing position number, the axle type and the bearing type of the axle where the electronic tag 1 is installed.
Preferably, each electronic tag 1 is further configured to encrypt, encode, and modulate the stored temperature data and the pre-stored data in sequence to obtain a data packet; and the electronic tag reader 2 is further configured to acquire the stored temperature data and the pre-stored data after demodulating, decoding and decrypting the data packets, respectively.
Compared with the prior art, the axle temperature monitoring system of the railway vehicle has the same beneficial effects as the axle temperature monitoring method of the railway vehicle, and is not repeated herein.
EXAMPLE III
Before describing the third embodiment in detail, the structure of the existing electronic tag will be briefly introduced. In the existing electronic tag, a structure that a rigid antenna, a bolt and a temperature sensing module are matched is adopted, and the whole temperature sensing module and the rigid antenna are designed inside the bolt. The design of the rigid antenna can only be designed in the bolt due to the nature (large volume and difficult fixation) of the rigid antenna, and the data transmission efficiency can be influenced in the bolt, so that the rigid antenna cannot be influenced on the original low-speed railway vehicle.
FIG. 3 is a schematic structural diagram of an electronic tag; FIG. 4 is a schematic diagram of a flexible antenna of the electronic tag; fig. 5 is a schematic structural diagram of an antenna mount of an electronic tag. The third embodiment is a further improvement made on the basis of the second embodiment.
As shown in fig. 3, the electronic tag includes: a bolt 10 mounted on an axle of the railway vehicle for conducting an axle temperature of a mounting position of the bolt 10 on the axle; the temperature sensing label module 40 is fixed outside the bolt 10 and used for detecting the shaft temperature conducted by the bolt 10 under the condition of acquiring the electric energy; and a flexible antenna 20 fixed outside the bolt 10, for transmitting electric energy obtained from the magnetic field of the antenna of the electronic tag reader adapted to the flexible antenna 20 to the temperature-sensitive tag module 40, and transmitting the shaft temperature detected by the temperature-sensitive tag module 40 to the electronic tag reader.
The bolt 10 is made of a heat conducting material, and is of a model number M24 multiplied by 60, and the outer part of the bolt is of an outer hexagonal structure 11, so that the shaft temperature of the mounting position of the bolt 10 can be conducted. Therefore, the temperature of the bolt 10 can be considered approximately as the axle temperature of the railway vehicle, and measuring the temperature of the bolt 10 can reflect the axle temperature of the axle position of the railway vehicle. In addition, in this embodiment, the bolt 10 not only can conduct heat, but also can play a role in self-fixing, and since the axle of the railway vehicle cannot be freely added with components, the bolt 10 provided by the bolt can be used for realizing temperature measurement and data transmission on the basis of not changing the original axle structure.
In this embodiment, as shown in fig. 4, the electronic tag further includes: the temperature-sensing tag module 40 (not shown in detail in the drawings, only the position of the temperature-sensing tag module is shown) is fixed outside the bolt 10 and is used for detecting the shaft temperature conducted by the bolt 10 when the electric energy is obtained.
The conventional temperature-sensitive tag module 40 is designed inside the bolt 10, mainly to match the function of a rigid antenna. In addition, the temperature-sensitive label module 40 actually includes two types of devices: and the temperature sensor is used for acquiring the shaft temperature conducted by the bolt 10. The RFID temperature sensing tag module is connected with the temperature sensor and used for acquiring the electric energy and sending the shaft temperature acquired by the temperature sensor to the ground read-write equipment through the flexible antenna 20.
Wherein the temperature sensor is integrated on the RFID tag chip for integration and miniaturization. In addition, it should be emphasized that the RFID temperature-sensing tag module adopted in the present invention is actually a passive RFID tag chip integrated with a temperature sensor, which induces electromagnetic waves from a magnetic field when the RFID temperature-sensing tag module is in the magnetic field of an antenna of an electronic tag reader, and converts the electromagnetic waves into electric energy required by the RFID temperature-sensing tag module, and after the electric energy is obtained, the RFID tag chip drives the temperature sensor integrated with the RFID tag chip to operate. In addition, in the present embodiment, the RFID tag chip further stores information such as axle information, bearing information, wheel set information, and tag mounting position information, which may be one or more of them, and the information is mainly used to mark the position where the RFID tag chip exists and to mark the position of the measured temperature.
In this embodiment, the electronic tag may further include: and the flexible antenna 20 is fixed outside the bolt 10 and used for transmitting electric energy obtained in a magnetic field of an electronic tag reader antenna matched with the flexible antenna 20 to the temperature-sensitive tag module 40 and transmitting the shaft temperature detected by the temperature-sensitive tag module 40 to the electronic tag reader.
The flexible antenna 20 is a key component of this embodiment, and is also a key component for implementing the present invention. Compared with the hard antenna in the prior art, the flexible antenna 20 in the embodiment is made of the ultrathin flexible FR4 material, which is thinner and easier to fix, and can be fixed outside the bolt 10, so that the transmission sensitivity is greatly improved, the communication with the electronic tag reader becomes faster and more reliable, and the requirement of transmitting data of the railway vehicle in high-speed driving is met.
More preferably, in the present embodiment, the following antenna structure is also designed:
the bolt 10 includes a first end surface 21 fixed to an outer portion of the bolt 10, a second end surface 23 spaced apart from the first end surface 21, and a connecting portion 22 connected to the first end surface 21 and the second end surface 23.
As shown in fig. 5, the first end face 21 and the second end face 23 are completely symmetrical after being unfolded. In practical use, the first end face 21 and the second end face 23 are arranged in parallel and spaced, the connecting portion 22 is arranged in the middle, and the connecting portion 22 not only realizes signal communication between the first end face 21 and the second end face 23 and increases the area of the whole antenna, but also can be used for relatively fixing the first end face 21 and the second end face 23, thereby increasing the strength of the whole electronic tag. In fig. 2, the first end face 21 and the second end face 23 are both rounded to match the end face of the bolt 10 (actually, the shape of a rounded notch, in order to design a connection member, the connection of the first end face 21 and the second end face 23 is realized). However, in practice, the first end surface 21 and the second end surface 23 may be in other shapes such as a circle, a polygon (including a triangle and a quadrangle), and the like. The first end face 21 and the second end face 23 are shaped mainly according to the end face of the bolt 10. When the end face of the bolt 10 is round, that is, designed to be round, and when it is square, it is designed to be square, and the purpose of this design is mainly to increase the area of the flexible antenna 20 and increase the reliability of signal transmission.
In order to fix the first end face 21 and the second end face 23 better, in the present embodiment, it is further preferable that the end face of the bolt 10 is provided with a groove 12 for accommodating the flexible antenna 20 and the temperature-sensitive tag module 40. The diameter of the groove 12 is 30mm, the depth of the groove 12 is 2.5mm, and the depth and the size of the groove do not influence the mechanical performance of the bolt 10. In addition, in order to improve the reliability of signal transmission, in this embodiment, the diameters of the first end surface 21, the second end surface 23 and the antenna holder 30 are set to be 28mm, and the thickness of the antenna holder 30 is 5mm, which can be just placed at the center of the groove 12, but can not be completely placed, but can also be fixed.
The first end face 21 and the second end face 23 are ultra-thin structures, so that unstable conditions are likely to occur during fixing, and in order to fix the relative positions of the first end face 21 and the second end face 23 and fix the relative positions of the first end face 21 and the second end face 23 to the end face of the bolt 10, the structure of the antenna bracket 30 is specially designed, as shown in fig. 5, the antenna bracket 30 is arranged between the first end face 21 and the second end face 23 to support the first end face 21 and the second end face 23. The upper surface of the antenna support 30 is connected to and sealed with the second end surface 23 of the flexible antenna 20 by a fixing adhesive, and the thickness of the fixing adhesive is 2mm in this embodiment.
Further preferably, the thickness of the first end surface 21 is 0.25mm, which is preset to realize heat conduction, and the first end surface 21 can conduct heat, and the upper surface and the lower surface of the first end surface 21 respectively and closely contact the temperature-sensitive label module 40 and the end surface of the bolt 10, so as to conduct the shaft temperature from the axle to the temperature-sensitive label module 40.
The first end face 21 is actually welded to a heat conducting pad at the bottom of the RFID temperature-sensitive tag module, and the first end face 21 is designed to be exposed with copper, so that heat can be directly conducted, the end face temperature of the bolt 10 is directly conducted to the temperature-sensitive tag module 40, and the temperature-sensitive tag module 40 directly detects the shaft temperature when acquiring the electric energy.
In this embodiment, it is further preferable that, since the railway vehicle has a large axle vibration during operation, in order to ensure the stability of the structure thereof, prevent it from falling down during movement, and in order to ensure the fixation of the flexible antenna 20, the antenna bracket 30 and the temperature-sensitive tag module 40, the electronic tag further includes:
and a housing (not shown) covering the temperature-sensitive tag module 40 and the flexible antenna 20 and fixed to the bolt 10, so that the temperature-sensitive tag module 40 and the flexible antenna 20 are fixed relative to the bolt 10.
The structure is actually a cover body covering the temperature-sensitive label module 40 and the flexible antenna 20. It should be emphasized that the housing of the present invention is a plastic housing which cannot shield, interfere, attenuate or absorb the electromagnetic wave of the ultra high frequency, and can withstand the severe environments such as high and low temperature, strong ultraviolet rays and oil stains, and the plastic housing has high hardness and strong vibration resistance, and can be firmly bonded to the hexagonal end face of the bolt 10. The plastic shell wraps the flexible antenna 20, the temperature-sensitive tag module 40 and the antenna support 30 and is bonded with the hexagonal head end face of the bolt 10 to fix and protect the electronic tag antenna.
Through foretell embodiment, with flexible antenna, temperature sensing label module design in the outside of bolt 10, strengthened the transmission of signal, rigid antenna among the prior art is bulky itself, is difficult to fix, and the flexible antenna 20 of this application can realize externally and conveniently fix to can be when railway vehicle high speed is gone, accurate transmission goes out the axle temperature. Compared with the electronic tag in the prior art, the electronic tag has the advantages that the sensitivity is improved by 8dB, the bandwidth is doubled and reaches 40 MHz. The requirements of high-speed railway vehicles on transmission sensitivity and bandwidth are perfectly met.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. The axle temperature monitoring method of the railway vehicle is characterized in that an axle of each railway vehicle is provided with an electronic tag capable of measuring the axle temperature, and each electronic tag is configured to be capable of acquiring electric energy from an electromagnetic field formed by an adaptive electronic tag reader antenna;
when each electronic tag passes through an electromagnetic field area formed by an antenna of an electronic tag reader, the antenna of each electronic tag induces an electromagnetic field to generate electric energy to supply power to each electronic tag and activate each electronic tag, and each activated electronic tag measures the shaft temperature of an axle where the electronic tag is located and stores the temperature data of the measured shaft temperature;
in the multi-tag anti-collision process, each electronic tag sends the stored temperature data and pre-stored data pre-stored in each electronic tag to the electronic tag reader, wherein the pre-stored data comprises position data for marking the installation position of each electronic tag and at least one of the following data: the temperature calibration data of each electronic tag and the tag code of each electronic tag;
the electronic tag reader sends the stored temperature data and the pre-stored data to a server; and
and the server determines alarm information according to the stored temperature data, the prestored data and a preset temperature alarm threshold corresponding to the position data.
2. The axle temperature monitoring method for railway vehicles according to claim 1, wherein the step of transmitting the stored temperature data and the pre-stored data pre-stored in each electronic tag to the electronic tag reader during the multi-tag anti-collision process comprises:
after receiving a multi-tag anti-collision algorithm related instruction sent by the electronic tag reader, each electronic tag sends the stored temperature data and the pre-stored data to the electronic tag reader; wherein the instructions related to the multi-label anti-collision algorithm comprise: the method comprises an inventory cycle starting instruction for starting an inventory cycle of the electronic tag, a selection instruction for selecting the electronic tag and a reading instruction for reading temperature data and pre-stored data stored in the electronic tag in a preset protocol.
3. The axle temperature monitoring method of a railway vehicle according to claim 1 or 2, wherein the position data marking the mounting position of the electronic tag includes at least one of: the axle number, the bearing position number, the axle type and the bearing type of the axle where the electronic tag is installed.
4. The axle temperature monitoring method of a railway vehicle according to claim 1,
before each electronic tag sends the stored temperature data and the pre-stored data pre-stored in each electronic tag to the electronic tag reader, the method further comprises:
each electronic tag sequentially encrypts, codes and modulates the stored temperature data and the pre-stored data to obtain a data packet; and
after each electronic tag sends the stored temperature data and the pre-stored data pre-stored in each electronic tag to the electronic tag reader, the method further comprises:
and the electronic tag reader demodulates, decodes and decrypts the data packet respectively to obtain the stored temperature data and prestored data.
5. An axle temperature monitoring system for a railway vehicle, the axle temperature monitoring system comprising:
each electronic tag is configured on an axle of each railway vehicle, and is used for measuring the axle temperature, storing temperature data and pre-stored data of the measured axle temperature and acquiring electric energy from an electromagnetic field of an antenna of an electronic tag reader which is matched with the electronic tag, wherein each electronic tag is also used for generating electric energy by an antenna induction electromagnetic field of each electronic tag when the electronic tag passes through an electromagnetic field area formed by the antenna of the electronic tag reader so as to supply power to each electronic tag and activate each electronic tag, and each activated electronic tag measures the axle temperature of the axle where the electronic tag is located and stores the temperature data of the measured axle temperature;
each electronic tag is configured to send, to the electronic tag reader, stored temperature data and pre-stored data pre-stored in each electronic tag in a multi-tag anti-collision process, where the pre-stored data includes location data that marks an installation location of each electronic tag, and at least one of: the temperature calibration data of each electronic tag and the tag code of each electronic tag;
the electronic tag reader is used for sending the stored temperature data and the pre-stored data to a server; and
and the server is used for determining alarm information according to the stored temperature data, the prestored data and a preset temperature alarm threshold corresponding to the position data.
6. The axle temperature monitoring system for railway vehicles according to claim 5, wherein each electronic tag is configured to transmit the stored temperature data and the pre-stored data pre-stored in each electronic tag to the electronic tag reader during the multi-tag anti-collision process, and the system comprises:
each electronic tag is used for sending the stored temperature data and the pre-stored data to the electronic tag reader after receiving a multi-tag anti-collision algorithm related instruction sent by the electronic tag reader; wherein the instructions related to the multi-label anti-collision algorithm comprise: the method comprises an inventory cycle starting instruction for starting an inventory cycle of the electronic tag, a selection instruction for selecting the electronic tag and a reading instruction for reading temperature data and pre-stored data stored in the electronic tag in a preset protocol.
7. The axle temperature monitoring system for a railway vehicle according to claim 5, wherein the position data marking the installation position of the electronic tag includes at least one of: the axle number, the bearing position number, the axle type and the bearing type of the axle where the electronic tag is installed.
8. The axle temperature monitoring system of a railway vehicle of claim 7, wherein each electronic tag is further configured to encrypt, encode and modulate the stored temperature data and the pre-stored data in sequence to obtain a data packet; and
and the electronic tag reader is also used for respectively demodulating, decoding and decrypting the data packet to obtain the stored temperature data and the pre-stored data.
9. The axle temperature monitoring system for a railway vehicle according to claim 5, wherein the electronic tag comprises:
a bolt mounted on an axle of the railway vehicle as a fastener of an axle end and used for thermally conducting an axle temperature to temperature sensing tag module of the bolt mounting position on the axle;
the temperature sensing label module is fixed outside the bolt and used for detecting the shaft temperature conducted by the bolt under the condition of acquiring the electric energy; and
and the flexible antenna is fixed outside the bolt and used for transmitting electric energy acquired from the magnetic field of the antenna of the electronic tag reader matched with the flexible antenna to the temperature-sensitive tag module and transmitting the shaft temperature and related data detected by the temperature-sensitive tag module to the electronic tag reader.
10. The axle temperature monitoring system for a railway vehicle of claim 9, wherein the flexible antenna comprises: the bolt comprises a first end face fixed to the outside of the bolt, a second end face arranged at intervals with the first end face, and a connecting part connected to the first end face and the second end face;
and, this electronic label still includes:
the antenna bracket is arranged between the first end face and the second end face so as to support the first end face and the second end face.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910541571.9A CN110217261B (en) | 2019-06-21 | 2019-06-21 | Axle temperature monitoring method and system for railway vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910541571.9A CN110217261B (en) | 2019-06-21 | 2019-06-21 | Axle temperature monitoring method and system for railway vehicle |
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| CN110217261A CN110217261A (en) | 2019-09-10 |
| CN110217261B true CN110217261B (en) | 2020-11-06 |
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| CN113758609A (en) * | 2020-09-17 | 2021-12-07 | 珠海黑石电气自动化科技有限公司 | Efficient switch cabinet temperature measurement system and implementation method thereof |
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| CN203323918U (en) * | 2013-06-28 | 2013-12-04 | 深圳市金溢科技有限公司 | Bearing temperature detection system |
| CN203854679U (en) * | 2014-04-18 | 2014-10-01 | 深圳市远望谷信息技术股份有限公司 | Passive temperature measuring device and train axle temperature detecting device |
| CN103978992B (en) * | 2014-06-13 | 2017-01-18 | 深圳市远望谷信息技术股份有限公司 | Mounting bolt capable of obtaining temperature of mounted equipment, and train axle thereof |
| CN106908166A (en) * | 2017-01-17 | 2017-06-30 | 北京康拓红外技术股份有限公司 | A kind of rolling stock critical component dynamic temperature measurement system and dynamic temperature measurement method |
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