Isothermal device for temperature calibration and train axle temperature detection system calibration device

Abstract

The utility model discloses an isothermal device for temperature calibration, which is used for providing a simulated axle temperature and comprises an isothermal block group, an isothermal block connecting sheet and a heating element, the isothermal block group is formed by splicing one or more arched isothermal blocks one by one and is used for simulating the axle temperature; the isothermal block connecting pieces are used for fixing the isothermal block group formed by splicing one or more isothermal blocks, and the isothermal block connecting pieces are fixed at the two ends of the arched isothermal blocks; and the heating element is arranged in the isothermal block group and is used for heating the isothermal block group. The utility model further discloses a train axle temperature detection system calibration device comprising the isothermal device for temperature calibration. The utility model further discloses a train axle temperature detection system calibration method achieved through the train axle temperature detection system calibration device, and the train axle temperature detection system calibration device has wide application prospects.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature detection and calibration, and relates to an isothermal device for temperature calibration and a calibration device for a train axle temperature detection system. Background Art

[0002] In recent years, the rapid development of rail transit has brought great convenience to people's lives, and train operation safety and health monitoring have also received increasing attention. Axle temperature is a crucial parameter in the operation of trains. It is mainly reflected in the following aspects:

[0003] 1. Operation safety: Excessive axle temperature of trains can lead to hot axle accidents, which seriously threaten the operation safety of trains. Once hot axles occur, the vehicle will be derailed or overturned, the bearings will be seriously heated and burned, and sometimes even the bearing components may be partially melted and adhered, which will cause great safety hazards to the running trains.

[0004] 2. Operation efficiency: If the axle temperature is abnormal, it may be caused by bearing failure, which will affect the operation efficiency of the train. For example, excessive axle temperature will increase the friction of the bearing, thereby increasing the running resistance of the train and reducing the running speed.

[0005] 3. Maintenance requirements: For railway transportation, it is essential to regularly test and monitor the axle temperature of trains. This can help to promptly detect and resolve potential faults and prevent accidents. At the same time, the service life of bearings can also be evaluated based on the axle temperature data, and replacement or repair can be carried out in a timely manner.

[0006] 4. Economy: Excessive axle temperature will not only increase the operating cost of the train, but also shorten the service life of the bearing. Therefore, real-time monitoring of axle temperature can improve the economy of the train while ensuring the safe operation of the train.

[0007] The axle temperature of trains is generally tested when trains enter and leave the depot every day. The testing equipment is fixed on the rail sleepers of the entry and exit lines, and the temperature of the axle passing through is detected by an infrared temperature measuring camera. Whether the temperature measurement of the infrared temperature measuring camera is accurate directly affects whether the axle temperature of the train is accurate and reliable. Since it is difficult to remove the infrared temperature measuring camera, it is difficult to calibrate the infrared camera regularly using conventional methods. At present, the standard temperature measuring black body is generally moved to the infrared temperature measuring camera site for calibration, but this method has three major problems: 1. It cannot simulate the actual operation scene of the train, and the measurement accuracy is biased. 2. Some infrared cameras (especially imported equipment) require the actual passage of the train to start and perform detection and analysis. The final temperature data results are processed by the system. The calibration of such infrared cameras cannot be achieved by fixing the black body furnace on the site simulation method; 3. The conventional isothermal block cannot display the current maximum temperature of the isothermal block in real time, resulting in the measurement result being out of sync with the temperature data measured by the axle temperature detection system, resulting in errors. Therefore, it is particularly important to design a temperature calibration isothermal device that can be fixedly connected to the bottom of the train for calibrating the train axle temperature detection system. Utility Model Content

[0008] In order to solve the deficiencies in the prior art, the purpose of the utility model is to provide an isothermal device for temperature calibration.

[0009] The utility model provides an isothermal device for temperature calibration, which is used to provide simulated shaft temperature, and comprises an isothermal block group, an isothermal block connecting piece, and a heating element;

[0010] The isothermal block group is composed of one or more arcuate isothermal blocks spliced ​​one by one, and is used to simulate the shaft temperature;

[0011] The isothermal block connecting piece is used to fix the isothermal block group formed by splicing one or more isothermal blocks. The isothermal block connecting piece is fixed at both ends of the arched isothermal block and is conveniently fixedly connected with a fixing bracket used to fix the temperature calibration isothermal device on the bottom of the train. In a specific embodiment, the multiple isothermal blocks are of equal size.

[0012] The isothermal connecting piece is a rigid metal structure;

[0013] The heating element is installed inside the isothermal block group and is used to heat the isothermal block group.

[0014] The isothermal block group is made of a material with good and uniform thermal conductivity, and is solid or hollow inside;

[0015] When the interior of the isothermal block group is hollow, the interior is arched; one or more guide plates for partition are arranged inside the isothermal block group to form a flow channel, and the guide plates are made of insulating material and do not affect the temperature measurement of the thermocouple; the guide plates are fixed in the internal cavity of the isothermal block group at equal or unequal intervals by means including gluing and fasteners.

[0016] Specifically, the flow channel is composed of a series of guide vanes, which are alternately fixed to the two sides of the flow channel; the first guide vane extends from one side of the flow channel and is fixed to the side, and the second guide vane that follows extends from the other side of the flow channel and is fixed to the opposite side. This alternating fixing mode continues until the flow channel is completely filled.

[0017] When the interior of the isothermal block group is hollow, isothermal circulation interfaces are also provided at both ends of the isothermal block group, and an isothermal circulation pump is externally connected. The internal cavity of the isothermal block group is filled with isothermal circulating liquid. Under the directional guide effect of the guide plate, the isothermal circulating liquid circulates inside the isothermal block group to make the temperature of the entire isothermal block group 5 more uniform and stable.

[0018] Since the isothermal device for temperature calibration is non-planar, it is difficult to manufacture using traditional manufacturing processes, and it is difficult to ensure good isothermal performance in a bent state. The interior of the device is filled with isothermal circulating fluid, which can better ensure the uniformity of its temperature. Using isothermal circulating fluid, the heating speed is also faster, which can ensure a more uniform temperature distribution in the heating area.

[0019] The heating element includes one or more elements, which are sealed inside the isothermal block group and penetrate one or more isothermal blocks to ensure temperature stability and uniform heating; the heating element is installed at both ends of the arched structure of the isothermal block group and generates heat using electric heating wires or other available heating forms.

[0020] The outer surface of the isothermal block group is provided with a temperature measurement sensor connecting piece, including a temperature measurement sensor anode connecting piece and a temperature measurement sensor cathode connecting piece;

[0021] Half of the outer surface of the isothermal device for temperature calibration is coated to form an insulating layer, and the coating form includes but is not limited to screen printing, magnetron sputtering or other suitable and available methods; one or more thermocouple cathodes are formed on the outside of the insulating layer by coating, and the coating form includes but is not limited to screen printing, magnetron sputtering or other suitable and available methods; when the isothermal block is large, the number of installed thermocouple cathodes is large, and when the isothermal block is small, the number of installed thermocouple cathodes is small, so as to ensure that the temperature of the entire isothermal block is true and reliable; the coating of the thermocouple cathode exceeds the insulating layer at the top of the arched structure of the isothermal block group, and the exceeding part is connected to the isothermal block group The size of the contact part is set according to actual needs, and the contact point is the temperature measuring point; when the contact part is large, the average temperature of the contact part can be used as the temperature measuring point data. In a specific embodiment, the length of the coating of the thermocouple cathode exceeding the insulating layer is 1 mm; the insulating layer exceeds the coating of the thermocouple cathode at one end of the arch structure of the isothermal block group, and the exceeding part is at least larger than the size of the cathode connecting piece of the temperature measurement sensor, so as to prevent the cathode connecting piece of the temperature measurement sensor from contacting the anode of the thermocouple; the temperature measuring point formed by the contact between the thermocouple cathode and the thermocouple anode provides a standard temperature data for the entire calibration device.

[0022] One or more cathode connecting pieces of the temperature measurement sensor are arranged on the insulating layer and are in contact with the cathode of the thermocouple; one or more anode connecting pieces of the temperature measurement sensor are directly arranged on the other side of the isothermal block group opposite to the cathode connecting piece of the temperature measurement sensor; the cathode connecting piece of the temperature measurement sensor is not in contact with the anode of the thermocouple;

[0023] In a specific embodiment, the number of the thermocouple cathodes corresponds one-to-one to the number of the temperature measurement sensor cathode connecting pieces.

[0024] The distance between each two adjacent thermocouple cathodes, each two adjacent temperature measurement sensor anode connecting pieces, or each two adjacent temperature measurement sensor cathode connecting pieces is at least 3 cm;

[0025] In the utility model, the isothermal block group is the thermocouple anode, and adopts a common anode structure, which reduces the thermocouple wiring, reduces the production cost and difficulty, and directly adheres the anode connecting piece of the temperature measurement sensor to the surface of the isothermal device for temperature calibration, and the temperature measurement point formed by the thermocouple anode and the thermocouple cathode is directly placed on the surface of the isothermal block group. Compared with the traditional form of placing the temperature measurement sensor inside the isothermal block, the measured data is more accurate.

[0026] The utility model also provides a train axle temperature detection system calibration device, the axle temperature detection system calibration device comprises: the above-mentioned temperature calibration isothermal device, a control unit, and an axle temperature measurement standard device;

[0027] The control unit is the control center of the shaft temperature detection system calibration device, controls the program flow and signal and data flow, controls the entire calibration device, and is a bridge connecting the temperature calibration isothermal device and the shaft temperature measurement standard device;

[0028] The shaft temperature measurement standard device is a temperature measuring device, which is used to measure the actual temperature data of the isothermal device for temperature calibration. The shaft temperature measurement standard device can provide more accurate shaft temperature to be measured, greatly improve the measurement accuracy level, and provide high-accuracy real-time temperature data of the isothermal device for temperature calibration;

[0029] The control unit is connected to the isothermal device for temperature calibration by wire, and is connected to the shaft temperature measurement standard device by wire and / or wirelessly.

[0030] The shaft temperature measurement standard device includes a temperature data acquisition and recording device; the temperature data acquisition and recording device is connected to the control unit via a wire (such as a wire) and / or a wireless (including Bluetooth, WIFI, 5G and other technologies), and is connected to the anode connecting piece of the temperature measurement sensor and the cathode connecting piece of the temperature measurement sensor via a wire (such as a wire);

[0031] The temperature data acquisition and recording device, the control unit, and the heating element are powered by a train onboard power supply module (24V) and / or a mains power supply (220V), that is, they are directly connected through a socket; the temperature data acquisition and recording device can also be powered by a built-in battery;

[0032] The temperature data acquisition and recording device has a wireless data transmission function, and can read the temperature data measured by the temperature measurement sensor remotely and in real time, and make records and analyses.

[0033] The anode connecting piece of the temperature measurement sensor and the isothermal block group (i.e., the thermocouple anode) are made of the same material, and the cathode connecting piece of the temperature measurement sensor and the thermocouple cathode are made of the same material; the connection point between the thermocouple anode and the thermocouple cathode is the temperature measurement point, and the temperature measurement point is arranged in the middle of the outer side of the arched structure of the isothermal block group.

[0034] The control unit can control the working state of the heating element by analyzing the temperature data collected by the temperature data recording device in the shaft temperature measurement standard device and detected by the temperature sensor connecting piece.

[0035] The shaft temperature measurement standard device also includes a digital display screen with a heating function. The digital display screen is fixedly connected to the temperature calibration isothermal device by fasteners and is generally placed at the edge of the temperature calibration isothermal device. The digital display screen includes a housing, a temperature-controllable heating rod, a heat shield, and a control motor. The housing serves as the outer frame of the entire digital display screen. The temperature-controllable heating rod, the heat shield, and the control motor are placed inside the housing and connected to the housing by fasteners, and are connected to each other by wired and / or wireless means.

[0036] The shell is made of metal material; the temperature-controllable heating rod is composed of a temperature-controllable metal heating rod, specifically a temperature-controllable bimetallic heating rod, which can achieve rapid temperature rise and fall; the heat shield is made of a heat-insulating material with good heat-insulating performance; and the control motor controls the opening and closing of the heat shield.

[0037] The digital display screen with heating function displays the highest temperature data after fitting measured by the measuring sensor. The digital display screen with heating function is composed of multiple digital module groups, each of which is composed of 7 to 8 controllable temperature heating rods. The digital module group is powered by a built-in battery or power supply (including but not limited to a train-mounted power supply module, AC power, etc.), connected to the power supply by a wire, and connected to the control unit by a wire (such as a wire) and / or wireless connection (including Bluetooth, WIFI, 5G and other technologies) to transmit data in real time. The heating temperature of the digital display screen with heating function is slightly lower than the set temperature of the isothermal block (generally the set temperature is -5°C). When the train axle temperature detection system installed on the rail detects the temperature, when shooting the infrared temperature measurement image, the real-time temperature at that time can be directly read from the infrared temperature measurement image photo for calibration, avoiding the measurement error caused by the time difference between the infrared temperature measurement image photo and the system recorded temperature.

[0038] When the axle temperature detection system of the train under test takes an axle temperature photo (thermal imager), the digital display screen can be taken together. The data read by the train axle temperature detection system is the highest temperature data (that is, approximately the set temperature of the isothermal block, which is also the temperature measured by the axle temperature measurement standard device). The temperature measurement photo taken will also capture the surrounding thermal imaging. At this time, the data displayed on the heating digital display screen can also be directly displayed on the photo, which is convenient for direct reading calibration. If the temperature of the temperature-controlled heating rod of the digital display screen with heating function is higher than the temperature of the isothermal device used for temperature calibration, the train axle temperature detection system will directly read the temperature of the temperature-controlled heating rod, and the calibration will produce errors and fail. If the temperature of the temperature-controlled heating rod of the digital display screen with heating function is too much lower than the set temperature, the data displayed on the heating digital display screen obtained will not be clear enough and cannot be compared with the data taken by the train axle temperature detection system. This mode solves the time difference between traditional measurement data and data taken by the axle temperature sensor, and directly records the temperature standard data on the thermal imaging photo.

[0039] The axle temperature detection system calibration device also includes a fixing bracket;

[0040] The fixing bracket includes an isothermal block fixing bracket and a control unit fixing bracket; the fixing bracket is fixed to the bottom of the train by one or more of fasteners, fixing hooks or strong magnets (the same form or different forms can be selected);

[0041] The isothermal block fixing frame appears in pairs, including at least 2, specifically, 2, 4, 6, 8...; the isothermal device for temperature calibration is fixedly connected to the isothermal block fixing frame by fasteners; the isothermal block fixing frame includes an isothermal block underbody fixing plate, fastener fixing holes, a vertical adjustment rod, a horizontal adjustment rod, a fixing fastener, an isothermal block fixing plate, and a fixing through hole.

[0042] The isothermal block fixing frame is made of rigid metal material, wherein the isothermal block bottom fixing plate is fixed to the bottom of the train by fasteners through fastener fixing holes, and is fixed to the bottom of the train by fixing hooks, and / or the isothermal block bottom fixing plate is made of strong magnetic material and can be adsorbed on the bottom of the train without loss.

[0043] The vertical adjustment rod is fixedly connected to the bottom fixing plate of the isothermal block through fasteners; the vertical adjustment rod is provided with fixed through holes perpendicular to each other along the length direction of the adjustment rod; the length of the fixed through holes is half of the total length of the vertical adjustment rod; the horizontal adjustment rod is provided with one or more adjustment fixing holes along the length direction, and the horizontal adjustment rod passes through the fixed through holes on the vertical adjustment rod and can move up and down in the fixed through holes; the horizontal adjustment rod is fixed together with the vertical adjustment rod through the fixing fasteners and the adjustment fixing holes; the position between the vertical adjustment rod and the horizontal adjustment rod can be adjusted through the fixing through holes. In a specific embodiment, the one or more adjustment fixing holes are equidistantly arranged in a straight line along the length direction, and the orientation of the adjustment fixing holes is opposite to the fixing fasteners, so that the horizontal adjustment rod is fixedly connected to the vertical adjustment rod through the fixing fasteners and the adjustment fixing holes.

[0044] The isothermal block fixing plate is fixedly connected to the other end of the horizontal adjustment rod through a fastener, and is connected to the isothermal block connecting plate through a fastener. The advantage of adopting this structure is that other equipment near the train axle can be avoided to ensure the safety and reliability of the isothermal block fixing frame.

[0045] The control unit fixing bracket is single or multiple; the control unit and the control unit fixing bracket are fixedly connected by fasteners; the control unit fixing bracket includes a control unit underbody fixing plate, a control unit fixing plate, and fixing fasteners; in some specific implementation processes, the control unit fixing bracket is provided with multiple control units, and the multiple control units fixed on the multiple control unit fixing brackets jointly complete the control of the train axle temperature detection system calibration device.

[0046] The control unit fixing frame is made of rigid metal material, wherein the control unit undercarriage fixing plate is fixed to the undercarriage of the train by fasteners, fixed to the undercarriage of the train by fixing hooks, and / or the control unit undercarriage fixing plate is made of strong magnetic material and can be adsorbed to the undercarriage of the train without loss. The control unit undercarriage fixing plate and the control unit fixing plate, and the control unit fixing plate and the control unit are connected by fixing fasteners.

[0047] The utility model also provides a train axle temperature detection system calibration method, the calibration method comprising the following steps:

[0048] 1) Connect and install the calibration device of the train axle temperature detection system. The isothermal device 1 for temperature calibration and the control unit 2 are fixedly connected to the fixed bracket 4; the control unit 2 and the axle temperature measurement standard device 3 (including the temperature data acquisition and recording device 14 and the digital display screen 21 with heating function) are connected by wires and / or wirelessly (including Bluetooth, WIFI, 5G and other technologies); the housing 22 of the digital display screen is fixedly connected to the isothermal device 1 for temperature calibration; the isothermal block group 5 is filled with isothermal circulating fluid 18, and the isothermal block group 5 is connected to the isothermal circulation pump 19 through the isothermal circulation interface 20; the isothermal circulation pump 19, the heating element 9, the digital display screen 21 with heating function, and the control unit 2 are connected to the power supply 11 to be powered by it.

[0049] 2) Check whether the calibration device of the train axle temperature detection system is working properly, set the temperature of the isothermal block group to the set temperature to be measured, and heat it up; at the same time, the controllable temperature heating rod 23 of the digital display screen 21 with heating function is preheated and heated to (set temperature - 5) ° C, and after the constant temperature is stabilized for at least 30 minutes, start the test;

[0050] 3) The data acquisition and recording device reads the data of each temperature measuring point of the shaft temperature measuring standard device, recorded as t1, t2...t n ; Determine the highest temperature point t at this time max and the lowest temperature point t min , if t max -t min ≥0.20℃, the testing engineer will receive a reminder on the mobile terminal of abnormal temperature of the isothermal block. The highest and lowest temperature points of the isothermal block will be tested every 5 seconds during the entire test process. If there is any deviation, an alarm will be issued immediately to ensure the reliability of the test data.

[0051] 4) The highest temperature point data collected by the data acquisition and recording device each time is recorded as T3, and the two temperature data points adjacent to the temperature measurement point are recorded as T1, T2, T4, and T5; the data are sorted as T1, T2, T3, T4, and T5, and the least squares method is used for fitting. After fitting, the temperature data curve T(x) is obtained; then T(x) is derived to obtain the highest temperature value T max ; Temperature data is updated every 5 seconds, and the real-time T is calculated max value;

[0052] 5) Maximum temperature value T max Displayed on a digital display screen with heating function, start the train and pass the train axle temperature detection system to be calibrated installed on the track at a slow speed of less than 3km / h.

[0053] 6) The train axle temperature detection system obtains the temperature of the isothermal block group of the train axle temperature detection system calibration device by infrared thermal imaging camera as δ max, you can directly read the highest temperature value T displayed on the digital display with heating function in the infrared photo max , the temperature deviation △T of the train axle temperature detection system at this temperature is calculated by formula (1);

[0054] △T=δ max -T max (1)

[0055] 7) Reset the train axle temperature detection system calibration device to other temperatures, repeat steps 2 to 6, and calibrate other temperature points in turn. After the test is completed, generate a calibration report.

[0056] Turn off the train axle temperature detection system calibration device, wait for its temperature to return to room temperature, remove the train axle temperature detection system calibration device and complete the test.

[0057] The beneficial effects of the utility model include:

[0058] 1. The train axle temperature detection system calibration device can be directly installed on the bottom of the train, and can perform temperature calibration on the train axle temperature detection system installed on the track. It is not limited by whether the calibration device needs to pass through a real train, and has good versatility. It is directly installed near the train axle, which can directly simulate the axle temperature, and the calibration data is more real and reliable.

[0059] 2. The temperature sensor of the shaft temperature measurement standard device 3 is directly made on the surface of the isothermal block group 5. The temperature measurement sensor made by this method (i.e., the temperature measurement point 15 formed by the thermocouple anode and the thermocouple cathode) is directly attached to the surface of the isothermal device 1 for temperature calibration. Compared with the traditional form of placing the temperature sensor inside the isothermal block, the measured data is more accurate.

[0060] 3. The axle temperature measurement standard device also includes a digital display screen 21 with a heating function. The temperature display screen displays the fitted maximum temperature data measured at the temperature measurement point 15. The digital display screen with a heating function is composed of 7 to 8 temperature-controllable heating rods. When the train axle temperature detection system installed on the rail detects the temperature and takes an infrared temperature measurement image, the real-time temperature at that time can be directly read from the infrared temperature measurement image photo for calibration, thereby avoiding the temperature difference caused by the time difference between the infrared temperature measurement image photo and the system recorded temperature.

[0061] 4. The calibration method uses data fitting to calculate the maximum temperature of the entire isothermal block. After testing, its accuracy is improved by 0.15°C compared to directly reading the maximum temperature data. It can ensure that the accuracy of the isothermal device used for temperature calibration reaches ±0.20°C, further meeting the calibration work of the high-precision train axle temperature test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0063] Figure 1 It is a structural diagram of a calibration device for a train axle temperature detection system of the utility model.

[0064] Figure 2 It is a schematic diagram of the installation of a calibration device for a train axle temperature detection system of the utility model.

[0065] Figure 3 It is a schematic diagram of the installation of an isothermal device for temperature calibration of the utility model.

[0066] Figure 4 The utility model is a schematic diagram of the external structure of an isothermal device for temperature calibration.

[0067] Figure 5 The utility model is a schematic diagram of the internal structure of an isothermal device for temperature calibration.

[0068] Figure 6 The utility model is an isothermal circulation structure diagram of an isothermal device for temperature calibration.

[0069] Figure 7 It is a schematic diagram of a standard device for measuring shaft temperature of the utility model.

[0070] Figure 8 It is a side structural diagram of the shaft temperature measuring standard device of the utility model.

[0071] Fig. 9 The utility model is a schematic diagram of installing a digital display screen with heating function.

[0072] Fig.10 It is a schematic diagram of a controllable heating rod of the utility model.

[0073] Fig.11 It is a schematic diagram of the heat shield and the control motor of the utility model.

[0074] Fig.12 It is a display schematic diagram of a digital display screen with a heating function of the utility model (the display data is 71.3).

[0075] Fig.13 This is a diagram of the actual test effect of the utility model (the digital display screen with heating function shows data of 60.2, and the data measured by the train axle temperature detection system is 60.7).

[0076] Fig.14The utility model is a wiring diagram of a calibration device for a train axle temperature detection system.

[0077] Fig.15 It is a structural schematic diagram of the isothermal block fixing frame 16 of the utility model.

[0078] Fig.16 It is a structural schematic diagram of the control unit fixing frame 17 of the utility model.

[0079] In the figure,

[0080] Isothermal device for temperature calibration 1, control unit 2, shaft temperature measurement standard device 3, fixed bracket 4, isothermal block group 5, isothermal block connecting piece 6, guide piece 7, temperature measurement sensor connecting piece 8, temperature measurement sensor anode connecting piece 81, temperature measurement sensor cathode connecting piece 82, heating element 9, power supply 11, insulating layer 12, thermocouple cathode 13, temperature data acquisition and recording device 14, temperature measurement point 15, isothermal block fixing frame 16, control unit fixing frame 17, isothermal circulating fluid 18, isothermal circulation pump 19, isothermal circulation interface 20, digital display screen 21, housing 22, controllable temperature heating rod 23, heat shield 24, control motor 25, train 30, axle 31, wheel 32, isothermal block bottom fixing plate 41, fastener fixing hole 42, vertical adjustment rod 43, horizontal adjustment rod 44, adjustment rod fixing fastener 45, isothermal block fixing plate 46, fixing through hole 47, control unit bottom fixing plate 51, control unit fixing plate 52, fixing fastener 53. DETAILED DESCRIPTION

[0081] The present invention is further described in detail with reference to the following specific embodiments and drawings. The process, conditions, experimental methods, etc. for implementing the present invention, except for the contents specifically mentioned below, are all common knowledge and common common sense in the art, and the present invention has no special restrictions.

[0082] The utility model provides an isothermal device for temperature calibration, wherein the isothermal device 1 for temperature calibration is used to provide a simulated shaft temperature, and comprises an isothermal block group 5, an isothermal block connecting piece 6, and a heating element 9;

[0083] The isothermal block group 5 is composed of one or more arcuate isothermal blocks spliced ​​one by one, and is used to simulate the shaft temperature;

[0084] The isothermal block connecting piece 6 is used to fix the isothermal block group 5 formed by splicing one or more isothermal blocks, and the isothermal block connecting piece 6 is fixed at both ends of the arc-shaped isothermal block;

[0085] The heating element 9 is installed inside the isothermal block group 5 to heat the isothermal block group 5 .

[0086] The interior of the isothermal block group 5 is solid or hollow. Figure 3-5 As shown;

[0087] When the interior of the isothermal block group 5 is hollow, the interior is arched; one or more guide plates 7 for partition are arranged inside the isothermal block group 5 to form a flow channel; the guide plates 7 are fixed in the internal cavity of the isothermal block group 5 at equal or unequal intervals by means including gluing and fasteners.

[0088] When the interior of the isothermal block group 5 is hollow, isothermal circulation interfaces 20 are further provided at both ends of the isothermal block group 5, and an isothermal circulation pump 19 is externally connected. The internal cavity of the isothermal block group 5 is perfused with an isothermal circulation fluid 18. The isothermal circulation fluid 18 circulates inside the isothermal block group 5 under the directional guidance of the guide plate 7. Figure 6 shown.

[0089] The heating element 9 includes one or more elements, which are arranged inside the isothermal block group 5 and penetrate one or more of the isothermal blocks; the heating element 9 is installed at both ends of the arched structure of the isothermal block group 5 and generates heat in a heating form including heating with electric heating wires.

[0090] like Figure 7 , 8 As shown, the outer surface of the isothermal block group 5 is provided with a temperature measurement sensor connecting piece 8, including a temperature measurement sensor anode connecting piece 81 and a temperature measurement sensor cathode connecting piece 82. Fig.14 As shown;

[0091] Half of the outer surface of the isothermal device 1 for temperature calibration is coated to form an insulating layer 12; one or more thermocouple cathodes 13 are formed by coating on the outside of the insulating layer 12; the coating of the thermocouple cathode 13 exceeds the insulating layer 12 at the top of the arched structure of the isothermal block group 5, and the exceeding part is in contact with the isothermal block group 5, and the contact point is the temperature measuring point 15; the insulating layer 12 exceeds the coating of the thermocouple cathode 13 at one end of the arched structure of the isothermal block group 5, and the exceeding part is at least larger than the size of the cathode connecting piece 82 of the temperature measurement sensor.

[0092] One or more temperature measurement sensor cathode connecting pieces 82 are arranged on the insulating layer 12 and are in contact with the thermocouple cathode 13; one or more temperature measurement sensor anode connecting pieces 81 are directly arranged on the other side of the isothermal block group 5 opposite to the temperature measurement sensor cathode connecting piece 82;

[0093] The distance between each two adjacent thermocouple cathodes 13, each two adjacent temperature measurement sensor anode connecting pieces 81, or each two adjacent temperature measurement sensor cathode connecting pieces 82 is at least 3 cm, and in a specific embodiment, is 5 cm.

[0094] The utility model also provides a train axle temperature detection system calibration device, such as Figure 1 , 2 As shown, the shaft temperature detection system calibration device includes an isothermal device 1 for temperature calibration, a control unit 2, and a shaft temperature measurement standard device 3;

[0095] The control unit 2 is the control center of the shaft temperature detection system calibration device, controlling the program flow and signal and data flow;

[0096] The shaft temperature measurement standard device 3 is a temperature measuring device, which is used to measure the actual temperature data of the temperature calibration isothermal device 1.

[0097] The shaft temperature measurement standard device 3 includes a temperature data acquisition and recording device 14; the temperature data acquisition and recording device 14 is connected to the control unit 2 by wire and / or wireless, and the temperature data acquisition and recording device 14 is connected to the anode connecting piece 81 of the temperature measurement sensor and the cathode connecting piece 82 of the temperature measurement sensor by wire;

[0098] The temperature data acquisition and recording device 14, the control unit 2, and the heating element 9 are powered by a train onboard power supply module and / or mains electricity; the temperature data acquisition and recording device 14 may also be powered by a built-in battery.

[0099] The shaft temperature measurement standard device 3 also includes a digital display screen 21 with a heating function, and the digital display screen 21 is fixedly connected to the temperature calibration isothermal device 1 through a fastener; the digital display screen 21 includes a housing 22, a temperature-controllable heating rod 23, a heat shield 24, and a control motor 25. Figure 9-12 As shown;

[0100] The temperature-controllable heating rod 23, the heat shield 24, and the control motor 25 are arranged inside the housing 22 and connected to the housing 22 via fasteners;

[0101] The shell 22 is made of metal material; the temperature-controllable heating rod 23 is composed of a temperature-controllable metal heating rod for achieving temperature rise and fall; the heat shield 24 is made of a heat-insulating material with good heat-insulating performance; and the control motor 25 controls the opening and closing of the heat shield.

[0102] The controllable temperature heating rod 23 is composed of one or more digital module groups, and the digital module group is powered by a built-in battery, a train-mounted power supply module and / or the mains;

[0103] The digital module group and the control unit 2 transmit data in real time via wired and / or wireless connection.

[0104] The axle temperature detection system calibration device also includes a fixed bracket 4, which is fixed to the bottom of the train by one or more of fasteners, fixed hooks, and strong magnets; the fixed bracket 4 includes an isothermal block fixing bracket 16 and a control unit fixing bracket 17;

[0105] The isothermal block fixing frame 16 appears in pairs, including at least two, and the isothermal block fixing frame 16 is fixedly connected to the isothermal device 1 for temperature calibration by fasteners;

[0106] The control unit fixing bracket 17 is single or multiple, and the control unit fixing bracket 17 is fixedly connected to the control unit 2 via fasteners.

[0107] The isothermal block fixing bracket 16 is made of a rigid metal material and includes an isothermal block bottom fixing plate 41, a fastener fixing hole 42, a vertical adjustment rod 43, a horizontal adjustment rod 44, an adjustment rod fixing fastener 45, an isothermal block fixing plate 46, and a fixing through hole 47. Fig.15 As shown;

[0108] The isothermal block bottom fixing plate 41 is fixed to the bottom of the train 30 by fasteners through the fastener fixing holes 42, fixed to the bottom of the train by fixing hooks, and / or made of strong magnetic material to be directly adsorbed and fixed to the bottom of the train;

[0109] The vertical adjustment rod 43 is fixedly connected to the isothermal block bottom fixing plate 41 by a fastener; the vertical adjustment rod 43 is provided with fixed through holes 47 which are perpendicular to each other along the length direction of the adjustment rod; the length of the fixed through holes 47 is half of the total length of the vertical adjustment rod;

[0110] The horizontal adjustment rod 44 is provided with one or more adjustment fixing holes along the length direction. The horizontal adjustment rod 44 passes through the fixing through hole 47 on the vertical adjustment rod and can move up and down in the fixing through hole 47. The horizontal adjustment rod 44 is fixed together with the vertical adjustment rod 43 by the adjustment rod fixing fastener 45 and the adjustment fixing hole.

[0111] The isothermal block fixing plate 46 is fixedly connected to the other end of the horizontal adjustment rod 44 through a fastener, and is connected to the isothermal block connecting plate 6 through a fastener.

[0112] The control unit fixing frame 17 is made of rigid metal material, and includes a control unit vehicle bottom fixing plate 51, a control unit fixing plate 52, and a fixing fastener 53, such as Fig.16 As shown;

[0113] The control unit bottom fixing plate 51 is fixed to the bottom of the train 30 by fasteners, fixed to the bottom of the train by fixing hooks, and / or made of strong magnetic material to be directly adsorbed and fixed to the bottom of the train;

[0114] The control unit vehicle bottom fixing plate 51 and the control unit fixing plate 52 , and the control unit fixing plate 52 and the control unit 2 are connected respectively by fixing fasteners 53 .

[0115] Actual example

[0116] In an embodiment of the utility model, the train axle temperature detection system calibration device comprises an isothermal device 1 for temperature calibration, a control unit 2, and an axle temperature measurement standard device 3;

[0117] The isothermal device 1 for temperature calibration is a temperature generating device, which is used to provide a simulated axle temperature to calibrate the train axle temperature detection system; it includes an isothermal block group 5, an isothermal block connecting piece 6, and a heating element 9;

[0118] The control unit 2 is the control center of the shaft temperature detection system calibration device, controls the program flow and signal and data flow, controls the entire calibration device, and is a bridge connecting the temperature calibration isothermal device 1 and the shaft temperature measurement standard device 3;

[0119] The shaft temperature measurement standard device 3 is a temperature measurement device, which is used to measure the actual temperature data of the temperature calibration isothermal device 1. The shaft temperature measurement standard device 3 can provide a more accurate shaft temperature to be measured, greatly improve the measurement accuracy level, and provide high-accuracy real-time temperature data of the temperature calibration isothermal device 1;

[0120] The control unit 2 is connected to the temperature calibration isothermal device 1 by wire, and is connected to the shaft temperature measurement standard device 3 by wire.

[0121] The isothermal block group 5 includes a plurality of isothermal blocks, each of which is in an arcuate shape. The plurality of isothermal blocks are spliced ​​one by one to form the isothermal block group 5; the isothermal block connecting pieces 6 are fixedly connected to both ends of the arcuate structure of the isothermal block group 5, and are used to fix the spliced ​​isothermal blocks and facilitate fixation with the fixing bracket; the isothermal block connecting piece 6 is made of stainless steel;

[0122] The heating elements 9 include two heating elements 9 which are arranged in the isothermal block group 5 and penetrate through a plurality of the isothermal blocks to ensure uniform heating.

[0123] The isothermal block group 5 is made of pure copper and is hollow inside; 15 guide plates 7 made of heat-resistant plastic material for partition are arranged inside the isothermal block group 5, and the guide plates 7 are fixedly connected to the internal cavity of the isothermal block group 5 by gluing at equal intervals, and the cross-sectional shape of the internal cavity of the isothermal block group 5 is also arched; the internal cavity of the isothermal block group 5 is filled with deionized water as the isothermal circulating fluid 18, and an isothermal circulating pump 19 can be externally connected through the isothermal circulation interface 20 provided on the isothermal block group 5, so that the isothermal circulating fluid 18 can circulate inside the isothermal block group 5, and the guide plates 7 are used for directional diversion, so that the temperature of the entire isothermal block group 5 is more uniform and stable;

[0124] The temperature measurement point 15 formed by the contact between the thermocouple cathode and the thermocouple anode provides a standard temperature data for the entire calibration device; the isothermal block group 5 serves as the thermocouple anode; the temperature measurement sensor connecting piece 8 is fixed on the outer surface of the arched structure of the isothermal block group 5, including the temperature measurement sensor anode connecting piece 81 and the temperature measurement sensor cathode connecting piece 82;

[0125] The insulating layer 12 is an outer coating covering half of the isothermal block group 5, and the coating is in the form of screen printing. The insulating layer is made of PET material, and the isothermal block group 5 is made of pure copper material; 20 thermocouple cathodes 13 are formed by plating constantan material on the outer side of the insulating layer 12 by magnetron sputtering, and 20 thermocouple cathodes 13 are installed to ensure that the temperature of the entire isothermal block is real and reliable; the coating of the thermocouple cathode 13 exceeds the insulating layer 12 by 1 mm at the top of the arched structure of the isothermal block group 5, and the excess part contacts the isothermal block group 5 as the thermocouple anode, and the contact point is the temperature measuring point 15; the insulating layer 12 exceeds the coating of the thermocouple cathode 13 on one side of the arched structure of the isothermal block group 5, and the excess part is at least larger than the size of the cathode connecting piece 82 of the temperature measurement sensor;

[0126] 10 anode connecting pieces 81 of the temperature measurement sensors are directly arranged and connected to the outer surface of the isothermal block group 5 as the anode of the thermocouple, and 20 cathode connecting pieces 82 of the temperature measurement sensors are arranged on the insulating layer 12 and are in contact and connected to the cathode 13 of the thermocouple;

[0127] The distance between each two adjacent thermocouple cathodes 13, each two adjacent temperature measurement sensor anode connecting pieces 81, or each two adjacent temperature measurement sensor cathode connecting pieces 82 is 5 cm.

[0128] In the present invention, the isothermal block group 5 is the thermocouple anode, and adopts a common anode structure, which reduces the thermocouple wiring and reduces the manufacturing cost and difficulty.

[0129] The shaft temperature measurement standard device 3 includes a temperature data acquisition and recording device 14; the temperature data acquisition and recording device 14 is connected to the control unit 2, the temperature measurement sensor anode connecting piece 81, and the temperature measurement sensor cathode connecting piece 82 through a wire;

[0130] The temperature data acquisition and recording device 14, the control unit 2, and the heating element 9 are powered by a train onboard power supply module (24V);

[0131] The anode connecting piece 81 of the temperature measurement sensor and the isothermal block group 5 (i.e., the thermocouple anode) are made of the same material, and the cathode connecting piece 82 of the temperature measurement sensor and the thermocouple cathode 13 are made of the same material; the connection point between the thermocouple anode and the thermocouple cathode is the temperature measuring point 15, and the temperature measuring point 15 is arranged in the middle of the outer side of the arched structure of the isothermal block group 5.

[0132] The shaft temperature measurement standard device 3 also includes a digital display screen 21 with a heating function, which is fixedly connected to the temperature calibration isothermal device 1 by fasteners and placed on the edge of the temperature calibration isothermal device 1; the digital display screen 21 includes a shell 22, a temperature-controllable heating rod 23, a heat shield 24, and a control motor 25. The shell 22 serves as the outer frame of the entire digital display screen 21, and the temperature-controllable heating rod 23, the heat shield 24, and the control motor 25 are placed inside the shell 22 and connected to the shell 22 by fasteners.

[0133] The shell 22 is made of stainless steel; the temperature-controllable heating rod 23 is composed of a bimetallic heating rod, which can achieve rapid temperature rise and fall; the heat shield 24 is composed of a heat-insulating film with good heat-insulating performance, and the specific material can be further selected according to actual needs; the control motor 25 controls the opening and closing of the heat shield.

[0134] The digital display screen 21 with heating function displays the highest temperature data after fitting measured by the measuring sensor. The digital display screen 21 with heating function is composed of three digital module groups, each of which is composed of 7 controllable temperature heating rods 23. The digital module group is powered by a built-in battery and transmits data in real time with the control unit 2 using a wire. The heating temperature of the digital display screen with heating function is set to the isothermal block set temperature of -5°C. When the train axle temperature detection system installed on the rail detects the temperature and shoots the infrared temperature measurement image, the real-time temperature at that time can be directly read from the infrared temperature measurement image photo for calibration, avoiding the measurement error caused by the time difference between the infrared temperature measurement image photo and the system recorded temperature.

[0135] The shaft temperature detection system calibration device also includes a fixed bracket 4;

[0136] The fixing bracket 4 includes an isothermal block fixing bracket 16 and a control unit fixing bracket 17; the fixing bracket 4 is fixed to the bottom of the train by fasteners;

[0137] The isothermal block fixing frame 16 appears in pairs, with a number of 2; the isothermal device 1 for temperature calibration is fixedly connected to the isothermal block fixing frame 16 by fasteners; the isothermal block fixing frame 16 includes an isothermal block underbody fixing plate 41, a fastener fixing hole 42, a vertical adjustment rod 43, a horizontal adjustment rod 44, a fixing fastener 45, an isothermal block fixing plate 46, and a fixing through hole 47.

[0138] The isothermal block fixing frame is made of rigid metal material, wherein the isothermal block bottom fixing plate is fixed to the bottom of the train by fasteners through the fastener fixing holes 42.

[0139] The isothermal block fixing plate 46 is connected to the isothermal block connecting plate 6 by fasteners; the vertical adjustment rod 43 is fixedly connected to the isothermal block vehicle bottom fixing plate 41 by fasteners; the vertical adjustment rod 43 is provided with fixing through holes 47 perpendicular to each other along the length direction of the adjustment rod; the length of the fixing through hole 47 is half of the total length of the vertical adjustment rod; the horizontal adjustment rod 44 is provided with five adjustment fixing holes along the length direction, the horizontal adjustment rod 44 passes through the fixing through hole 47 on the vertical adjustment rod, and can move up and down in the fixing through hole 47; the horizontal adjustment rod 44 is fixed to the vertical adjustment rod 43 by fixing fasteners 45 and the adjustment fixing holes; the position between the vertical adjustment rod 43 and the horizontal adjustment rod 44 can be adjusted by the fixing through hole 47. The isothermal block fixing plate 46 is fixedly connected to the other end of the horizontal adjustment rod 44 by fasteners, and is connected to the isothermal block connecting plate 6 by fasteners. The advantage of adopting this structure is that other equipment near the train axle 31 and the wheel 32 can be avoided, ensuring that the isothermal block fixing frame 16 is safe and reliable.

[0140] The control unit fixing frame 17 is single; the control unit 2 is fixedly connected to the control unit fixing frame 17 by fasteners; the control unit fixing frame 17 includes a control unit vehicle bottom fixing plate 51, a control unit fixing plate 52, and a fixing fastener 53.

[0141] The control unit fixing frame is made of rigid metal material, wherein the control unit undercarriage fixing plate 51 is fixed to the undercarriage of the train by fasteners. The control unit undercarriage fixing plate 51 and the control unit fixing plate 52 are connected with the control unit 2 by fixing fasteners 53.

[0142] This embodiment also provides a method for calibrating a train axle temperature detection system, which measures the temperature of the train axle temperature detection system at 40°C and 60°C. The specific steps are as follows:

[0143] 1) Connect and install the calibration device of the train axle temperature detection system. The isothermal device 1 for temperature calibration and the control unit 2 are fixedly connected to the fixed bracket 4; the control unit 2 and the axle temperature measurement standard device 3 (including the temperature data acquisition and recording device 14 and the digital display screen 21 with heating function) are connected by wires; the housing 22 of the digital display screen is fixedly connected to the isothermal device 1 for temperature calibration; the isothermal block group 5 in this embodiment is a hollow structure, and deionized water is poured into the isothermal block group 5, and it is connected to the isothermal circulation pump 19; the isothermal circulation pump 19, the heating element 9, the digital display screen 21 with heating function, the control unit 2, and the temperature data acquisition and recording device 14 are connected to the power supply 11, and powered by it.

[0144] 2) Check whether the calibration device of the train axle temperature detection system is working properly, set the temperature of the isothermal block to 40°C, and heat it up; at the same time, the temperature-controllable heating rod 23 of the digital display screen 21 with heating function is heated to 35°C, and after the constant temperature is stabilized for 30 minutes, the test is started;

[0145] 3) The data acquisition and recording device reads the data of each temperature measurement point of the shaft temperature measurement standard, recorded as t1, t2...t n ; Determine the highest temperature point t at this time max and the lowest temperature point t min , if t max -t min ≥0.20℃, the testing engineer will receive a reminder of abnormal isothermal block on his mobile terminal. After isothermalization, the test will be conducted every 5 seconds during the entire test process. If there is any deviation, an alarm will be issued immediately to ensure the reliability of the test data.

[0146] 4) The highest temperature point data collected by the data acquisition and recording device each time is recorded as T3, and the two temperature data points adjacent to the temperature measurement point are recorded as T1, T2, T4, and T5; the data are sorted as T1, T2, T3, T4, and T5, and the least squares method is used for fitting. After fitting, the temperature data curve T(x) is obtained; then T(x) is derived to obtain the highest temperature value T max ; Temperature data is updated every 5 seconds, and the real-time T is calculated max value;

[0147] 5) Maximum temperature value T max Displayed on a digital display screen with heating function, start the train and pass through the axle temperature detection system of the train to be calibrated at a speed of less than 3km / h.

[0148] 6) The train axle temperature detection system obtains the temperature of the isothermal block group of the train axle temperature detection system calibration device by infrared thermal imaging camera as δ max , you can directly read the highest temperature value T displayed on the digital display with heating function in the infrared photo max , the temperature deviation △T of the train axle temperature detection system at this temperature is calculated by formula (1);

[0149] △T=δ max -T max (1)

[0150] 7) Reset the train axle temperature detection system calibration device to 60°C, repeat steps 2 to 6, and calibrate other temperature points in turn. The results are as follows: Fig.13 As shown, after the test is completed, a calibration report is generated.

[0151] Turn off the train axle temperature detection system calibration device, wait for its temperature to return to room temperature, remove the train axle temperature detection system calibration device and complete the test.

[0152] The protection content of the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, changes and advantages that can be thought of by those skilled in the art are included in the present invention and are protected by the attached claims.

Claims

1. An isothermal device for temperature calibration, characterized in that: The isothermal device (1) for temperature calibration is used to provide a simulated shaft temperature, and comprises an isothermal block group (5), an isothermal block connecting piece (6), and a heating element (9); The isothermal block group (5) is composed of one or more arcuate isothermal blocks spliced ​​one by one, and is used to simulate the shaft temperature; The isothermal block connecting piece (6) is used to fix the isothermal block group (5) formed by splicing one or more isothermal blocks, and the isothermal block connecting piece (6) is fixed at both ends of the arc-shaped isothermal block; The heating element (9) is installed inside the isothermal block group (5) and is used to heat the isothermal block group (5).

2. The isothermal device for temperature calibration according to claim 1, characterized in that: The interior of the isothermal block group (5) is solid or hollow; When the interior of the isothermal block group (5) is hollow, the interior is arched; one or more guide plates (7) for partitioning are arranged inside the isothermal block group (5) to form a flow channel; the guide plates (7) are fixed in the internal cavity of the isothermal block group (5) at equal or unequal intervals by means including gluing and fasteners.

3. The isothermal device for temperature calibration according to claim 2, characterized in that: When the interior of the isothermal block group (5) is hollow, isothermal circulation interfaces (20) are provided at both ends of the isothermal block group (5), and an isothermal circulation pump (19) is externally connected. The internal cavity of the isothermal block group (5) is filled with isothermal circulation fluid (18), and the isothermal circulation fluid (18) circulates inside the isothermal block group (5) under the directional flow guidance effect of the guide plate (7).

4. The isothermal device for temperature calibration according to claim 1, characterized in that: The heating element (9) includes one or more heating elements, which are arranged inside the isothermal block group (5) and penetrate one or more of the isothermal blocks; the heating element (9) is installed at both ends of the arched structure of the isothermal block group (5) and generates heat in a heating method including heating with electric heating wire.

5. The isothermal device for temperature calibration according to claim 1, characterized in that: The outer surface of the isothermal block group (5) is provided with a temperature measurement sensor connecting piece (8), comprising a temperature measurement sensor anode connecting piece (81) and a temperature measurement sensor cathode connecting piece (82); Half of the outer surface of the temperature calibration isothermal device (1) is coated to form an insulating layer (12); one or more thermocouple cathodes (13) are formed on the outer side of the insulating layer (12) by coating; the coating of the thermocouple cathode (13) exceeds the insulating layer (12) at the top of the arched structure of the isothermal block group (5), and the exceeding part is in contact with the isothermal block group (5), and the contact point is a temperature measuring point (15); the insulating layer (12) exceeds the coating of the thermocouple cathode (13) at one end of the arched structure of the isothermal block group (5), and the exceeding part is at least larger than the size of the cathode connecting piece (82) of the temperature measurement sensor.

6. The isothermal device for temperature calibration according to claim 5, characterized in that: One or more temperature measurement sensor cathode connecting pieces (82) are arranged on the insulating layer (12) and are in contact with and connected to the thermocouple cathode (13); one or more temperature measurement sensor anode connecting pieces (81) are directly arranged on the other side of the isothermal block group (5) opposite to the temperature measurement sensor cathode connecting piece (82); The distance between each two adjacent thermocouple cathodes (13), each two adjacent temperature measurement sensor anode connecting pieces (81), or each two adjacent temperature measurement sensor cathode connecting pieces (82) is at least 3 cm.

7. A train axle temperature detection system calibration device, characterized in that: The shaft temperature detection system calibration device comprises an isothermal device (1) for temperature calibration as described in any one of claims 1 to 6, a control unit (2), and a shaft temperature measurement standard device (3); The control unit (2) is the control center of the shaft temperature detection system calibration device, and controls the program flow and signal and data flow; The shaft temperature measurement standard device (3) is a temperature measuring device used to measure and display the actual standard temperature data of the temperature calibration isothermal device (1); The control unit (2) is connected to the temperature calibration isothermal device (1) by wire, and is connected to the shaft temperature measurement standard device (3) by wire and / or wirelessly.

8. The shaft temperature detection system calibration device according to claim 7, characterized in that: The shaft temperature measurement standard device (3) comprises a temperature data acquisition and recording device (14); the temperature data acquisition and recording device (14) is connected to the control unit (2) via wired and / or wireless communication; the temperature data acquisition and recording device (14) is connected to the anode connecting piece (81) of the temperature measurement sensor and the cathode connecting piece (82) of the temperature measurement sensor via wired communication; The control unit (2) and the heating element (9) in the temperature calibration isothermal device (1) are powered by a train onboard power supply module and / or mains electricity; the temperature data acquisition and recording device (14) is powered by a train onboard power supply module, mains electricity and / or a built-in battery.

9. The shaft temperature detection system calibration device according to claim 7, characterized in that: The shaft temperature measurement standard device (3) further comprises a digital display screen (21) with a heating function, wherein the digital display screen (21) is fixedly connected to the temperature calibration isothermal device (1) via a fastener; the digital display screen (21) comprises a housing (22), a temperature-controllable heating rod (23), a heat shield (24), and a control motor (25); The temperature-controllable heating rod (23), the heat shield (24), and the control motor (25) are arranged inside the housing (22) and connected to the housing (22) via fasteners; The housing (22) is made of metal material; the temperature-controllable heating rod (23) is composed of a temperature-controllable metal heating rod for achieving temperature rise and fall; the heat shield (24) is made of heat-insulating material; the control motor (25) controls the opening and closing of the heat shield (24); The temperature-controllable heating rod (23) is composed of one or more digital module groups, and the digital module groups are powered by a built-in battery, a train-mounted power supply module and / or a mains supply; The digital module group and the control unit (2) transmit data in real time via a wired and / or wireless connection.

10. The shaft temperature detection system calibration device according to claim 7, characterized in that: The axle temperature detection system calibration device also includes a fixed bracket (4), and the fixed bracket (4) is fixed to the bottom of the train (30) by one or more of a fastener, a fixed hook, and a strong magnet; the fixed bracket (4) includes an isothermal block fixing bracket (16) and a control unit fixing bracket (17); The isothermal block fixing frames (16) appear in pairs, including at least two, and the isothermal block fixing frames (16) are fixedly connected to the isothermal device (1) for temperature calibration via fasteners; The control unit fixing frame (17) is single or multiple, and the control unit fixing frame (17) is fixedly connected to the control unit (2) via a fastener; The isothermal block fixing frame (16) is made of a rigid metal material, and comprises an isothermal block bottom fixing plate (41), a fastener fixing hole (42), a vertical adjustment rod (43), a horizontal adjustment rod (44), an adjustment rod fixing fastener (45), an isothermal block fixing plate (46), and a fixing through hole (47); The isothermal block bottom fixing plate (41) is fixed to the bottom of the train by fasteners through fastener fixing holes (42), fixed to the bottom of the train by fixing hooks, and / or made of strong magnetic material to be directly adsorbed and fixed to the bottom of the train; The vertical adjustment rod (43) is fixedly connected to the isothermal block bottom fixing plate (41) via a fastener; the vertical adjustment rod (43) is provided with fixing through holes (47) along the length direction of the adjustment rod and perpendicular to each other; the length of the fixing through holes (47) is half of the total length of the vertical adjustment rod (43); One or more adjustment fixing holes are arranged on the horizontal adjustment rod (44) along the length direction; the horizontal adjustment rod (44) passes through the fixing through hole (47) on the vertical adjustment rod and can move up and down in the fixing through hole (47); the horizontal adjustment rod (44) and the vertical adjustment rod (43) are fixed together by an adjustment rod fixing fastener (45) and the adjustment fixing hole; The isothermal block fixing plate (46) is fixedly connected to the other end of the horizontal adjustment rod (44) via a fastener, and is connected to the isothermal block connecting plate (6) via a fastener; The control unit fixing frame (17) is made of a rigid metal material and comprises a control unit vehicle bottom fixing plate (51), a control unit fixing plate (52), and a fixing fastener (53); The control unit vehicle bottom fixing plate (51) is fixed to the train bottom by fasteners, fixed to the train bottom by fixing hooks, and / or is made of strong magnetic material and directly fixed to the train bottom by adsorption; The control unit vehicle bottom fixing plate (51) and the control unit fixing plate (52), and the control unit fixing plate (52) and the control unit (2) are respectively connected by fixing fasteners (53).

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