Axle temperature monitoring system and method for coal transportation train

Abstract

The invention discloses an axle temperature monitoring system and method for a coal transportation train, and relates to the field of train operation and maintaining.The vehicle-mounted axle temperature monitoring sensor comprises a main body shell, a temperature measuring rod, a first-stage locking ring, a second-stage locking ring, a circuit board and a vehicle-mounted network interface, and a first temperature sensor and a second temperature sensor are arranged in the temperature measuring rod; the distance between the first temperature sensor and the second temperature sensor is consistent with the distance between two outer rings of a double-row tapered roller bearing structure of an axle of the coal transportation train; the first-stage locking ring is fixedly arranged on the outer side of one end of the temperature measuring rod, and the second-stage locking ring is movably arranged at one end of the main body shell through threads; the outer side of the first-stage locking ring is provided with an external thread matched with the internal thread of the adapter, the inner side of the second-stage locking ring is provided with an internal thread, and one end of the main body shell is provided with an external thread matched with the internal thread of the second-stage locking ring. According to the invention, comprehensive and continuous monitoring of the axle temperature of the coal transportation train is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of train operation and maintenance, and in particular to an axle temperature monitoring system and method for a coal transportation train. BACKGROUND

[0002] The axle temperature of the axle of the coal transportation train is very important for the driving safety of the coal transportation train.

[0003] The current axle temperature monitoring scheme is non-contact detection, that is, a ground axle temperature monitoring device is usually arranged at intervals along the line to non-contact detect the axle temperature of the passing coal transportation train. This method has a significant blind area: due to the large interval distance, the axle temperature change of the coal transportation train within the 30KM interval between two monitoring points cannot be captured, which may cause the temperature anomaly to continue to develop in the blind area without being discovered in time, and there is a safety hazard. SUMMARY

[0004] In view of the above problems, the present application provides an axle temperature monitoring system and method for a coal transportation train to realize comprehensive and continuous monitoring of the axle temperature of the coal transportation train. The specific scheme is as follows:

[0005] The first aspect of the present application provides an axle temperature monitoring system for a coal transportation train, comprising: a vehicle-mounted axle temperature monitoring sensor, an environmental temperature sensor and a vehicle-mounted communication network;

[0006] The vehicle-mounted axle temperature monitoring sensor and the environmental temperature sensor are in communication connection with the vehicle-mounted communication network;

[0007] The vehicle-mounted axle temperature monitoring sensor comprises: a main body shell, a temperature measuring rod, a primary locking ring, a secondary locking ring, a circuit board and a vehicle-mounted network interface, the first temperature sensor and the second temperature sensor are arranged inside the temperature measuring rod, the distance between the first temperature sensor and the second temperature sensor is consistent with the distance between the two outer rings of the double-row tapered roller bearing structure of the axle of the coal transportation train; one end of the temperature measuring rod is fixedly connected with one end of the main body shell, the primary locking ring is fixedly arranged outside one end of the temperature measuring rod, so that one end of the temperature measuring rod passes through the primary locking ring, the secondary locking ring is movably arranged at one end of the main body shell through threads; the outer side of the primary locking ring has an external thread matched with the internal thread of the bearing saddle, the inner side of the secondary locking ring is provided with an internal thread, one end of the main body shell is provided with an external thread matched with the internal thread of the secondary locking ring, and the outer side of the secondary locking ring is provided with a groove matched with a locking tool;

[0008] The main body shell is a regular hexagonal prism to be adapted to a hexagonal wrench, the circuit board is fixedly arranged in the main body shell by a damping structure, one end of the vehicle-mounted network interface is arranged in the middle of one side of the main body shell, and the other end of the vehicle-mounted network interface is a communication line connection end; the circuit board is provided with a microprocessor, and the circuit board is electrically connected with the first temperature sensor, the second temperature sensor and the vehicle-mounted network interface.

[0009] In a possible implementation, the microprocessor of the vehicle-mounted axle temperature monitoring sensor obtains the temperature data of the first outer ring collected by the first temperature sensor and the temperature data of the second outer ring collected by the second temperature sensor, compares the temperature data with at least one preset temperature value, generates a target signal adapted to the comparison result, and transmits the target signal and the collected temperature data to the vehicle-mounted communication network.

[0010] In a possible implementation, the vehicle-mounted axle temperature monitoring sensor further comprises a battery connected with the circuit board and supplying power to each power-consuming device in the vehicle-mounted axle temperature monitoring sensor through the circuit board.

[0011] If the temperature data collected by the first temperature sensor and the second temperature sensor within a first preset time length are both lower than a target temperature, the microprocessor controls at least one power-consuming device in the vehicle-mounted axle temperature monitoring sensor to stop working for a second preset time length and then start working again.

[0012] In a possible implementation, if the microprocessor receives a sleep instruction transmitted through the vehicle-mounted communication network, the microprocessor controls at least one power-consuming device in the vehicle-mounted axle temperature monitoring sensor to stop working for a second preset time length and then start working again, or the microprocessor receives a wake-up instruction transmitted through the vehicle-mounted communication network and controls each power-consuming device in the vehicle-mounted axle temperature monitoring sensor to start working.

[0013] In a possible implementation, the vehicle-mounted axle temperature monitoring sensor further comprises a non-volatile memory, and the microprocessor saves the temperature data collected by the first temperature sensor and the second temperature sensor, the working state parameters of the first temperature sensor and the second temperature sensor, the state information of the vehicle-mounted communication network, and the data received and transmitted through the vehicle-mounted communication network to the non-volatile memory.

[0014] When the vehicle-mounted axle temperature monitoring sensor works abnormally, the microprocessor locks at least part of the data stored in the non-volatile memory to avoid being overwritten by other data.

[0015] The second aspect of the application provides a method for monitoring the axle temperature of a coal transportation train, which is applied to the axle temperature monitoring system of the coal transportation train of the first aspect or any implementation manner of the first aspect, and the method comprises the following steps of:

[0016] The microprocessor of the vehicle-mounted axle temperature monitoring sensor obtains the temperature data of the first outer ring collected by the first temperature sensor and the temperature data of the second outer ring collected by the second temperature sensor, compares the temperature data with at least one preset temperature value, generates a target signal matched with the comparison result, and transmits the target signal and the collected temperature data to the vehicle-mounted communication network.

[0017] In a possible implementation, the vehicle-mounted axle temperature monitoring sensor further comprises a battery connected with the circuit board and supplying power to each power-consuming device in the vehicle-mounted axle temperature monitoring sensor through the circuit board.

[0018] The method further comprises the following step of: if the temperature data collected by the first temperature sensor and the second temperature sensor within a first preset time length are both lower than a target temperature, the microprocessor controls at least one power-consuming device in the vehicle-mounted axle temperature monitoring sensor to stop working for a second preset time length and then start working again.

[0019] In a possible implementation, the method further comprises the following steps of:

[0020] If the microprocessor receives a sleep instruction transmitted through the vehicle-mounted communication network, the microprocessor controls at least one power-consuming device in the vehicle-mounted axle temperature monitoring sensor to stop working for a second preset time length and then start working again, or the microprocessor controls each power-consuming device in the vehicle-mounted axle temperature monitoring sensor to start working after receiving a wake-up instruction transmitted through the vehicle-mounted communication network.

[0021] In a possible implementation, the vehicle-mounted axle temperature monitoring sensor further comprises a non-volatile memory, and the method further comprises the following steps of:

[0022] The microprocessor saves the temperature data collected by the first temperature sensor and the second temperature sensor, the working state parameters of the first temperature sensor and the second temperature sensor, the state information of the vehicle-mounted communication network, and the data received and transmitted through the vehicle-mounted communication network to the non-volatile memory.

[0023] When the vehicle-mounted axle temperature monitoring sensor works abnormally, the microprocessor locks at least part of the data stored in the non-volatile memory to avoid being overwritten by other data.

[0024] In a possible implementation, the method further comprises the following steps of:

[0025] If the temperature data collected by the first temperature sensor and the second temperature sensor within a first preset time length are both lower than a target temperature, the microprocessor controls the first temperature sensor and the second temperature sensor to reduce the collection frequency of temperature data.

[0026] By means of the technical solutions described above, the axle temperature monitoring system and method for a coal transportation train provided by the application can collect the temperatures of the two outer rings of the double-row tapered roller bearing structure through the two temperature sensors arranged in the temperature measuring rod, thereby achieving comprehensive and continuous monitoring of the axle temperature of the coal transportation train. Meanwhile, the two-stage locking ring is used to achieve the close, adjustable installation angle and detachable connection between the on-board axle temperature monitoring sensor and the bearing saddle. The shock absorbing structure can reduce the vibration of the circuit board, thereby improving the stability and service life of the circuit board. Moreover, the on-board axle temperature monitoring sensor has a microprocessor, which has the ability to directly compare the temperatures collected by the two temperature sensors with a preset temperature value and generate a target signal adapted to the comparison result, thereby reducing the operation burden of other devices and reducing the amount of data transmitted by the on-board communication network. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and other features, advantages, and aspects of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings, in which like numerals denote like elements throughout the drawings. It should be understood that the drawings are designed for the purpose of illustration only and other elements and implementations can be used without departing from the scope of the present disclosure.

[0028] Figure 1 A structure schematic view of an on-board axle temperature monitoring sensor provided by the application in one perspective;

[0029] Figure 2 A structure schematic view of an on-board axle temperature monitoring sensor provided by the application in another perspective;

[0030] Figure 3 A partial enlarged view of an on-board axle temperature monitoring sensor provided by the application;

[0031] Figure 4 A structure schematic view of an on-board axle temperature monitoring sensor provided by the application in another perspective;

[0032] Figure 5 A sectional view of an on-board axle temperature monitoring sensor provided by the application;

[0033] Figure 6 An enlarged view of a main body shell of an on-board axle temperature monitoring sensor provided by the application;

[0034] Figure 7A schematic view of a vehicle-mounted axle temperature monitoring sensor installed behind a bearing saddle is provided in the present application.

[0035] The reference signs are explained as follows:

[0036] The main body shell 101, the temperature measuring rod 102, the primary locking ring 103, the secondary locking ring 104, the circuit board 105, the vehicle-mounted network interface 106, the first temperature sensor 107, the second temperature sensor 108, the groove 109, the shock-absorbing structure 110, the battery 111, the temperature measuring point 112, the outer ring 201, and the bearing saddle 202. DETAILED DESCRIPTION

[0037] The embodiments of the present application are described below in conjunction with the accompanying drawings. The terms used in the embodiment part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0038] The embodiments of the present application are described below in conjunction with the accompanying drawings. The skilled person can know that, with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0039] The terms “first”, “second”, and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is only a distinguishing way adopted in the description of the embodiments of the present application for the objects with the same attribute in the description. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion, so that the processes, methods, systems, products or equipment containing a series of units do not have to be limited to those units, but can include other units not clearly listed or inherent to these processes, methods, products or equipment.

[0040] The axle temperature monitoring system of the coal transportation train provided by the embodiments of the present application can include: a vehicle-mounted axle temperature monitoring sensor, an environment temperature sensor, and a vehicle-mounted communication network.

[0041] The vehicle-mounted axle temperature monitoring sensor and the environment temperature sensor are in communication connection with the vehicle-mounted communication network.

[0042] Through the vehicle-mounted communication network, the temperature collected by the vehicle-mounted axle temperature monitoring sensor and the environment temperature sensor can be transmitted to other devices connected to the vehicle-mounted communication network, such as a monitoring platform, a server, or a center console in the cab of the coal transportation train.

[0043] The vehicle-mounted communication network can be provided by at least one network device, such as a vehicle-mounted gateway.

[0044] The vehicle-mounted axle temperature monitoring sensor can monitor the axle temperature of the axle of the coal transportation train, and the environment temperature sensor can monitor the environment temperature. The two sensors can send the detected temperature to the vehicle-mounted communication network, and then to other devices, such as a monitoring platform, through the vehicle-mounted communication network. The operation personnel can perform corresponding operation according to the two temperatures and the prompt information of the monitoring platform, so as to improve the driving safety. In an optional embodiment, the vehicle-mounted axle temperature monitoring sensor can judge whether the axle temperature exceeds the preset temperature value after detecting the axle temperature, and generate a temperature alarm signal and send it to the monitoring platform when the axle temperature exceeds the preset temperature value. The vehicle-mounted axle temperature monitoring sensor can collect the temperatures of the two outer rings of the double-row tapered roller bearing structure of the axle of the coal transportation train respectively, and judge whether the temperature of each outer ring exceeds the preset temperature value. The identification of the outer ring whose temperature exceeds the preset temperature value and the temperature alarm signal are sent to the monitoring platform together, so that the operation personnel can know which outer ring whose temperature exceeds the preset temperature value. The vehicle-mounted axle temperature monitoring sensor and the environment temperature sensor can detect the temperature by sampling, and the sampling frequency can be adjusted according to actual needs. The vehicle-mounted axle temperature monitoring sensor can also determine the temperature change trend according to the temperature values in a period of time, and determine whether to generate a temperature alarm signal and send it to the monitoring platform according to the temperature change trend.

[0045] Please refer to Figures 1 to 7 The vehicle-mounted axle temperature monitoring sensor provided by the embodiment of the present application can include a main body shell 101, a temperature measuring rod 102, a first locking ring 103, a second locking ring 104, a circuit board 105, and a vehicle-mounted network interface 106. The first temperature sensor 107 and the second temperature sensor 108 are arranged in the temperature measuring rod 102.

[0046] Figure 5 For Figure 4 The sectional view in the direction of AA' is shown in FIG. 2. As shown in FIGS. 1 and 2, the first temperature sensor 107 and the second temperature sensor 108 are arranged in the temperature measuring rod 102. Figure 2 、 Figure 5 and Figure 7 The distance between the first temperature sensor 107 and the second temperature sensor 108 (i.e. the length of the temperature measuring rod 102) is shown in FIG. 3. Figure 7The distance between the two temperature measuring points 112, which are the temperature measuring points of the first temperature sensor 107 and the temperature measuring points of the second temperature sensor 108, is consistent with the distance between the two outer rings 201 of the double-row tapered roller bearing structure of the axle of the coal transportation train. Among them, the first temperature sensor 107 can collect the temperature of one outer ring 201, and the second temperature sensor 108 can collect the temperature of the other outer ring 201, so as to realize the separate collection of the temperatures of the two outer rings 201. The inventors of the present application have found that the temperatures of the two outer rings of the double-row tapered roller bearing structure of the axle of the coal transportation train may have a large difference during the driving of the vehicle, and therefore if only the temperature of one outer ring 201 is collected, the problem of incomplete and inaccurate detection may occur. Therefore, two temperature sensors are provided in the present application, and the distance between the two temperature sensors is consistent with the distance between the two outer rings 201. In this way, when the on-board axle temperature monitoring sensor is installed on the bearing saddle 202, the two temperature sensors are opposite to one outer ring 201 respectively to collect the temperature of the opposite outer ring 201, realizing the simultaneous and separate collection of the temperatures of the two outer rings 201.

[0047] One end of the temperature measuring rod 102 is fixedly connected to one end of the main body shell 101, and the first locking ring 103 is fixedly arranged outside one end of the temperature measuring rod 102, so that one end of the temperature measuring rod 102 penetrates through the first locking ring 103, as shown in Figure 3 The second locking ring 104 is movably arranged at one end of the main body shell 101 by threads, please refer to Figure 3 and Figure 7 The outer side of the first locking ring 103 has an external thread matched with the internal thread in the bearing saddle 202, the inner side of the second locking ring 104 is provided with an internal thread, one end of the main body shell 101 is provided with an external thread matched with the internal thread of the second locking ring 104, and the outer side of the second locking ring 104 is provided with a groove 109 matched with a locking tool.

[0048] The present application realizes the close, adjustable installation angle and detachable connection of the on-board axle temperature monitoring sensor and the bearing saddle 202 through the two-stage locking ring. In the installation process, first, the temperature measuring rod 102 is inserted into the bearing saddle 202, then the external thread of the first locking ring 103 is screwed into the internal thread of the bearing saddle 202 and the on-board axle temperature monitoring sensor is adjusted to the required installation angle, and the external thread of the first locking ring 103 is tightly connected with the internal thread of the bearing saddle 202. Due to the limitation of actual working conditions, the on-board axle temperature monitoring sensor may need to be adjusted to the preset angle after being installed on the bearing saddle 202. Then, the second locking ring 104 is rotated by the locking tool matched with the groove 109, so that it gradually approaches the surface of the bearing saddle 202 and finally tightly connects with the surface of the bearing saddle 202, realizing locking.

[0049] Please refer to Figure 1 ,Figure 3 and Figure 4 The main body shell 101 is in the shape of a regular hexagonal prism to be compatible with a hexagonal wrench. Figure 6 is an enlarged view of the main body shell 101, as Figure 6 shown, the circuit board 105 is fixedly arranged inside the main body shell 101 through the damping structure 110. As Figure 1 shown, one end of the vehicle network interface 106 is arranged in the middle of one side of the main body shell 101, and the other end of the vehicle network interface 106 is a communication line connection end. The circuit board 105 is provided with a microprocessor (not shown in the figure), and the circuit board 105 is electrically connected with the first temperature sensor 107, the second temperature sensor 108, and the vehicle network interface 106.

[0050] By setting the main body shell 101 in the shape of a regular hexagonal prism, the hexagonal wrench can be used to clamp the main body shell 101 and rotate it, so that the vehicle axle temperature monitoring sensor is installed into or detached from the bearing saddle 202 under the cooperation of the primary locking ring 103. Of course, contrary to the above-described installation process, when disassembling, the secondary locking ring 104 can be first rotated by the locking tool matched with the groove 109, so that it gradually separates from the surface of the bearing saddle 202, and then the main body shell 101 is rotated by the hexagonal wrench, and the primary locking ring 103 is rotated out of the bearing saddle 202, thereby realizing disassembly.

[0051] As Figure 7 shown, when the vehicle axle temperature monitoring sensor is installed into the bearing saddle 202 through the primary locking ring 103 and the secondary locking ring 104, the two temperature measuring points 112 (i.e. the temperature measuring points of the first temperature sensor 107 and the second temperature sensor 108) are respectively opposite to the two outer rings 201 of the double-row tapered roller bearing structure of the axle of the coal transportation train, so as to accurately measure the temperature of the two outer rings.

[0052] The coal transportation train is a train for transporting coal, and the axle temperature monitoring system in the coal transportation train is often affected by vibration. The damping structure 110 can reduce the vibration suffered by the circuit board 105, thereby improving the stability and service life of the circuit board 105. The damping structure 110 can be in various damping forms, for example, the damping structure 110 is made of an elastic material, which can be an elastic rubber or a spring.

[0053] The first temperature sensor 107 and the second temperature sensor 108 can be connected on the circuit board 105 through wires, and the vehicle network interface 106 can be detachably connected on the circuit board 105 through a pre-set connector. Of course, the above connection methods are only examples.

[0054] The axle temperature monitoring system of the coal transportation train provided by the embodiment of the present application can collect the temperatures of the two outer rings of the double-row tapered roller bearing structure through the two temperature sensors arranged in the temperature measuring rod, and realize comprehensive and continuous monitoring of the axle temperature of the coal transportation train. Meanwhile, the two-stage locking ring is used to realize the close, adjustable installation angle and detachable connection between the vehicle-mounted axle temperature monitoring sensor and the bearing saddle. The damping structure can reduce the vibration of the circuit board, thereby improving the stability and service life of the circuit board. Moreover, the vehicle-mounted axle temperature monitoring sensor has a microprocessor, which has the ability to directly compare the temperatures collected by the two temperature sensors with the preset temperature value and generate a target signal adapted to the comparison result, thereby reducing the operation burden of other devices and reducing the amount of data transmitted by the vehicle-mounted communication network.

[0055] Optionally, in another optional embodiment, the microprocessor of the vehicle-mounted axle temperature monitoring sensor can obtain the temperature data of the first outer ring collected by the first temperature sensor 107 and the temperature data of the second outer ring collected by the second temperature sensor 108, and compare them with at least one preset temperature value to generate a target signal adapted to the comparison result, and transmit the target signal and the collected temperature data to the vehicle-mounted communication network.

[0056] Optionally, when the temperature data of the first outer ring is greater than the preset temperature value, a signal of temperature abnormality of the first outer ring is generated; when the temperature data of the second outer ring is greater than the preset temperature value, a signal of temperature abnormality of the second outer ring is generated. When the temperature data of the first outer ring is not greater than the preset temperature value, a signal of normal temperature of the first outer ring is generated; when the temperature data of the second outer ring is not greater than the preset temperature value, a signal of normal temperature of the second outer ring is generated.

[0057] The target signal adapted to the comparison result can be sent to the vehicle-mounted gateway through the vehicle-mounted communication network, or sent to other devices or other networks, such as sent to a mobile phone or a server through the Internet.

[0058] Optionally, in another optional embodiment, as shown in Figure 6 Optionally, in another optional embodiment, as shown in

[0059] If the temperature data collected by the first temperature sensor 107 and the second temperature sensor 108 within the first preset time length are both lower than the target temperature, the microprocessor controls at least one electric device in the vehicle-mounted axle temperature monitoring sensor to stop working for a second preset time length and then start working again after the second preset time length.

[0060] In some coal transport trains, the freight cars are not equipped with power supply lines, which causes problems in the power supply of the on-board axle temperature monitoring sensors. The application can supply power to each power-consuming device in the on-board axle temperature monitoring sensor through the battery 111. In order to save power, the application can control the on-board axle temperature monitoring sensor to enter the energy-saving mode when the temperatures of the two outer rings are normal for a long time.

[0061] Optionally, low-power devices can be selected for each component in the on-board axle temperature monitoring sensor to further save power.

[0062] Optionally, the first temperature sensor and the second temperature sensor are each provided with a platinum resistance temperature sensor PT100 and a MAX31865 chip. The MAX31865 chip can convert the resistance value change of the platinum resistance temperature sensor into a digital signal and transmit it to the microprocessor.

[0063] Optionally, in another optional embodiment, if the microprocessor receives a sleep instruction transmitted through the vehicle communication network, the microprocessor controls at least one power-consuming device in the on-board axle temperature monitoring sensor to stop working for a second preset time length and then start working after the second preset time length, or the microprocessor receives a wake-up instruction transmitted through the vehicle communication network and controls each power-consuming device in the on-board axle temperature monitoring sensor to start working.

[0064] The microprocessor in this embodiment can sleep according to the sleep instruction transmitted by the vehicle communication network to save power. The sleep instruction can be sent by the vehicle gateway or transmitted to the microprocessor through the vehicle communication network by other devices through the Internet.

[0065] Optionally, in another optional embodiment, the on-board axle temperature monitoring sensor further comprises a non-volatile memory (not shown in the figure), and the microprocessor saves the temperature data collected by the first temperature sensor 107 and the second temperature sensor 108, the working state parameters of the first temperature sensor 107 and the second temperature sensor 108, the state information of the vehicle communication network, and the data transmitted through the vehicle communication network to the non-volatile memory.

[0066] When the on-board axle temperature monitoring sensor works abnormally, the microprocessor locks at least part of the data stored in the non-volatile memory to avoid being overwritten by other data.

[0067] The non-volatile memory has the characteristic that data is not lost after power failure. Since the size of the vehicle-mounted axle temperature monitoring sensor is limited, the storage capacity of the non-volatile memory inside the vehicle-mounted axle temperature monitoring sensor is also small. At this time, the latest temperature data can be used to cover the oldest temperature data in a cyclic covering manner. However, in order to save the temperature data when the vehicle-mounted axle temperature monitoring sensor works abnormally (so as to facilitate determination of the problem severity and finding of the cause according to the temperature data), the embodiment can lock at least part of the data stored in the non-volatile memory when the vehicle-mounted axle temperature monitoring sensor works abnormally, so as to avoid being covered by other data.

[0068] Optionally, the temperature data collected by the vehicle-mounted axle temperature monitoring sensor can be processed locally in the vehicle-mounted axle temperature monitoring sensor. Through filtering and screening data, abnormality identification, trend analysis and the like, various abnormality alarm modes such as point alarm, tracking alarm and rate alarm can be realized. The above processing process of the vehicle-mounted axle temperature monitoring sensor can be flexibly configured through near field communication, and individual adjustment can be made according to different vehicle type criteria, so as to realize flexible adaptation, non-contact upgrade, safety and convenience. Compared with original data, the amount of data is greatly reduced after processing, and the data load is effectively reduced.

[0069] The vehicle-mounted axle temperature monitoring sensor can trigger a warning (approaching abnormality) or alarm (abnormality) mechanism according to the temperature rise and temperature rise difference, and distinguish different abnormality levels.

[0070] The vehicle-mounted axle temperature monitoring sensor can send original temperature data, trend analysis, abnormality flag and the like to the vehicle-mounted gateway through CAN-FD bus in a customized format, and then report to the vehicle-mounted gateway. The vehicle-mounted axle temperature monitoring sensor can also upload only the processed key data.

[0071] The vehicle-mounted axle temperature monitoring sensor can support remote OTA upgrade, and can perform firmware upgrade and update through CAN-FD bus, and remotely configure built-in strategy, filtering parameter, threshold and the like, without affecting normal use of the vehicle, so as to realize non-stop maintenance.

[0072] The vehicle-mounted axle temperature monitoring sensor can support BLE near field communication, and can communicate with the vehicle-mounted axle temperature monitoring sensor through a mobile phone App, complete data interaction, OTA firmware upgrade, parameter configuration and the like, realize non-contact maintenance, and improve work efficiency.

[0073] In order to solve the problem that the key state data before and after the fault cannot be traced after the data transmission is interrupted due to the fault of the transmission module, abnormal power supply or external interference, a sensor data black box module is integrated in the sensor, which is used to realize key data retention and fault tracing support in the fault scene. The data black box is designed in one body with the sensor, and a non-volatile storage unit is built in. It supports continuous caching of shaft temperature raw data, sensor working state parameters, including power supply voltage, core chip temperature, calibration coefficient and data transmission link state information, according to time stamp.

[0074] In the normal working state, the black box stores the continuous data of the last 48 hours in the "cyclic coverage" mode; when the sensor detects that the sensor itself is abnormal, including but not limited to: data transmission fails for 5 times in a row, the power supply voltage is lower than the threshold, and the core chip temperature exceeds 85℃, the control chip immediately triggers the "data locking" instruction, stops the cyclic coverage, marks all the cached data from 30 minutes before the abnormality to the moment of the abnormality as "fault tracing data" and retains it.

[0075] The data in the black box is stored in a special self-defined data packet, and a CRC32 check code is attached to ensure data integrity; data reading needs to be read through the special physical interface (Type-C) reserved by the sensor or the authorized App near field communication, to prevent unauthorized data tampering or leakage.

[0076] The initial sampling frequency of the vehicle-mounted shaft temperature monitoring sensor is set to 1Hz, the filtering time is 3S; the OTA and remote parameter configuration are turned on, the double-zone temperature difference threshold is set to 8℃, and the fixed-point alarm and tracking alarm modes are turned on at the same time.

[0077] After the vehicle starts, the shaft temperature monitoring system of the coal transportation train is automatically powered on, and the environment temperature sensor broadcasts the environment temperature once a minute; the vehicle-mounted shaft temperature monitoring sensor synchronously collects the temperature of two outer rings, calculates the temperature difference, the temperature difference with the environment and the change trend in real time, and when the temperature of a certain outer ring exceeds the dynamic alarm threshold, immediately sends an alarm information through the CAN bus, and uploads the key data such as the temperature of the outer ring and the change rate.

[0078] The shaft temperature monitoring system of the coal transportation train provided in the application is tested in a-40℃~85℃ environment box for a long time, and the sensor data acquisition, operation and transmission are normal. Under the condition of simulating vehicle vibration, the sensor is fastened reliably, and the data transmission is stable.

[0079] The application also provides a shaft temperature monitoring method for a coal transportation train, which is applied to any one of the shaft temperature monitoring systems for a coal transportation train, and the method can include:

[0080] The microprocessor of the vehicle axle temperature monitoring sensor obtains the temperature data of the first outer ring collected by the first temperature sensor 107 and the temperature data of the second outer ring collected by the second temperature sensor 108, compares the temperature data with at least one preset temperature value, generates a target signal adapted to the comparison result, and transmits the target signal and the collected temperature data to the vehicle communication network.

[0081] Optionally, the vehicle axle temperature monitoring sensor further comprises a battery 111 connected with the circuit board 105 and supplying power to each electrical device in the vehicle axle temperature monitoring sensor through the circuit board 105.

[0082] The above method further comprises: if the temperature data collected by the first temperature sensor 107 and the second temperature sensor 108 within the first preset time length are both lower than the target temperature, the microprocessor controls at least one electrical device in the vehicle axle temperature monitoring sensor to stop working for a second preset time length and then start working.

[0083] Optionally, the above method further comprises:

[0084] If the microprocessor receives a sleep instruction transmitted through the vehicle communication network, the microprocessor controls at least one electrical device in the vehicle axle temperature monitoring sensor to stop working for a second preset time length and then start working, or the microprocessor receives a wake-up instruction transmitted through the vehicle communication network and controls each electrical device in the vehicle axle temperature monitoring sensor to start working.

[0085] Optionally, the vehicle axle temperature monitoring sensor further comprises a non-volatile memory, and the above method further comprises:

[0086] The microprocessor saves the temperature data collected by the first temperature sensor 107 and the second temperature sensor 108, the working state parameters of the first temperature sensor 107 and the second temperature sensor 108, the state information of the vehicle communication network, and the data received and transmitted through the vehicle communication network to the non-volatile memory.

[0087] When the vehicle axle temperature monitoring sensor works abnormally, the microprocessor locks at least part of the data stored in the non-volatile memory to avoid being overwritten by other data.

[0088] Optionally, the above method further comprises:

[0089] If the temperature data collected by the first temperature sensor 107 and the second temperature sensor 108 within the first preset time length are both lower than the target temperature, the microprocessor controls the first temperature sensor 107 and the second temperature sensor 108 to reduce the collection frequency of the temperature data.

[0090] It should be noted that, as used in this application, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0091] The above embodiments of the present application are only used to illustrate the technical solutions of the present application, and not intended to limit the present application. Although the present application has been described in detail, it should be noted that those skilled in the art can make various modifications and variations to the technical solutions and implementation forms of the present application without departing from the spirit and scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A coal transport train axle temperature monitoring system, characterized in that, include: Vehicle-mounted axle temperature monitoring sensor, ambient temperature sensor, and vehicle-mounted communication network; The on-board axle temperature monitoring sensor and the ambient temperature sensor are connected to the on-board communication network. The vehicle-mounted axle temperature monitoring sensor includes: a main housing, a temperature measuring rod, a primary locking ring, a secondary locking ring, a circuit board, and a vehicle network interface. The temperature measuring rod contains a first temperature sensor and a second temperature sensor. The distance between the first and second temperature sensors is the same as the distance between the two outer rings of the double-row tapered roller bearing structure of the coal transport train axle. One end of the temperature measuring rod is fixedly connected to one end of the main housing. The primary locking ring is fixedly disposed on the outside of one end of the temperature measuring rod, allowing one end of the temperature measuring rod to pass through the primary locking ring. The secondary locking ring is movably disposed on one end of the main housing via a thread. The outer side of the primary locking ring has an external thread matching the internal thread of the bearing saddle. The inner side of the secondary locking ring has an internal thread. One end of the main housing has an external thread adapted to the internal thread of the secondary locking ring. The outer side of the secondary locking ring has a groove adapted to a locking tool. The main body shell is in the shape of a regular hexagonal prism to fit a hexagonal wrench. The circuit board is fixedly installed inside the main body shell by a shock-absorbing structure. One end of the vehicle network interface is located in the middle of one side of the main body shell, and the other end of the vehicle network interface is a communication line connection end. A microprocessor is installed on the circuit board, and the circuit board is electrically connected to the first temperature sensor, the second temperature sensor, and the vehicle network interface.

2. The axle temperature monitoring system for coal transport trains according to claim 1, characterized in that, The microprocessor of the vehicle-mounted axle temperature monitoring sensor obtains the temperature data of the first outer ring collected by the first temperature sensor and the temperature data of the second outer ring collected by the second temperature sensor, compares them with at least one preset temperature value, generates a target signal adapted to the comparison result, and transmits the target signal and each of the collected temperature data to the vehicle-mounted communication network.

3. The axle temperature monitoring system for coal transport trains according to claim 1, characterized in that, The vehicle axle temperature monitoring sensor also includes a battery, which is connected to the circuit board and supplies power to the various electrical devices in the vehicle axle temperature monitoring sensor through the circuit board. If the temperature data collected by the first temperature sensor and the second temperature sensor within a first preset time period are both lower than the target temperature, the microprocessor controls at least one of the electrical devices in the vehicle axle temperature monitoring sensor to stop working for a second preset time period and then start working again after stopping working for the second preset time period.

4. The axle temperature monitoring system for coal transport trains according to claim 3, characterized in that, If the microprocessor receives a sleep command transmitted through the vehicle communication network, the microprocessor controls at least one electrical device in the vehicle axle temperature monitoring sensor to stop working for a second preset time and then start working again after the second preset time; or the microprocessor controls each electrical device in the vehicle axle temperature monitoring sensor to start working after receiving a wake-up command transmitted through the vehicle communication network.

5. The axle temperature monitoring system for coal transport trains according to claim 1, characterized in that, The vehicle-mounted axle temperature monitoring sensor further includes a non-volatile memory, and the microprocessor saves the temperature data collected by the first temperature sensor and the second temperature sensor, the operating status parameters of the first temperature sensor and the second temperature sensor, the status information of the vehicle communication network, and the data transmitted and received through the vehicle communication network to the non-volatile memory. When the on-board axle temperature monitoring sensor malfunctions, the microprocessor locks at least a portion of the data stored in the non-volatile memory to prevent it from being overwritten by other data.

6. A method for monitoring axle temperature on a coal transport train, characterized in that, The method of the axle temperature monitoring system applied to the coal transport train according to any one of claims 1 to 5 includes: The microprocessor of the vehicle axle temperature monitoring sensor obtains temperature data of the first outer ring collected by the first temperature sensor and temperature data of the second outer ring collected by the second temperature sensor, compares them with at least one preset temperature value, generates a target signal adapted to the comparison result, and transmits the target signal and the collected temperature data to the vehicle communication network.

7. The method for monitoring axle temperature of coal transport trains according to claim 6, characterized in that, The vehicle axle temperature monitoring sensor also includes a battery, which is connected to a circuit board and supplies power to the various electrical devices in the vehicle axle temperature monitoring sensor through the circuit board. The method further includes: if the temperature data collected by the first temperature sensor and the second temperature sensor within a first preset time period are both lower than the target temperature, the microprocessor controls at least one electrical device in the vehicle axle temperature monitoring sensor to stop working for a second preset time period and then start working again after stopping working for the second preset time period.

8. The method for monitoring axle temperature of coal transport trains according to claim 7, characterized in that, The method further includes: If the microprocessor receives a sleep command transmitted through the vehicle communication network, the microprocessor controls at least one electrical device in the vehicle axle temperature monitoring sensor to stop working for a second preset time and then start working again after the second preset time; or the microprocessor controls each electrical device in the vehicle axle temperature monitoring sensor to start working after receiving a wake-up command transmitted through the vehicle communication network.

9. The method for monitoring axle temperature of coal transport trains according to claim 6, characterized in that, The on-board axle temperature monitoring sensor further includes: a non-volatile memory, and the method further includes: The microprocessor saves the temperature data collected by the first temperature sensor and the second temperature sensor, the operating status parameters of the first temperature sensor and the second temperature sensor, the status information of the vehicle communication network, and the data transmitted and received through the vehicle communication network to the non-volatile memory. When the on-board axle temperature monitoring sensor malfunctions, the microprocessor locks at least a portion of the data stored in the non-volatile memory to prevent it from being overwritten by other data.

10. The method for monitoring axle temperature of a coal transport train according to claim 6, characterized in that, The method further includes: If the temperature data collected by the first temperature sensor and the second temperature sensor within a first preset time period are both lower than the target temperature, the microprocessor controls the first temperature sensor and the second temperature sensor to reduce the frequency of temperature data collection.

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