A temperature monitoring method, device and storage medium for aircraft wheel brakes

Abstract

The present invention discloses a temperature monitoring method, device and storage medium for aircraft wheel brakes. The present invention fully considers the factor that the temperature of the cold end of a thermocouple will affect the measurement result, and specifically constructs a temperature calibration table when the cold end is at different calibration temperatures. In actual measurement, according to the actual temperature of the cold end of the thermocouple, a temperature calibration table corresponding to the cold end temperature is found, and based on the actual voltage output by the thermocouple, the corresponding actual temperature value is matched in the calibration table; finally, based on the matched actual temperature value, the real temperature of the aircraft brake can be obtained; therefore, compared with the traditional technology, the present invention can reduce the influence of the temperature change of the cold end of the thermocouple on the measurement result, thereby improving the measurement accuracy, and is very suitable for large-scale application and promotion in the field of aircraft brake temperature monitoring.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft brake temperature monitoring, and in particular relates to a temperature monitoring method, device and storage medium for aircraft wheel brakes. Background Art

[0002] The brake system is an important part of the aircraft landing gear and an important device to ensure the safe operation of the aircraft. In actual use, the performance and working status of the brake system directly affect the safety of the aircraft. The aircraft will generate a lot of heat during the braking process, which will cause the temperature of the brake system to rise. Among them, excessively high brake temperature will affect the operation of the brake system and may even damage the brake system. Therefore, it is necessary to use thermocouples to monitor the temperature of the aircraft brake system in real time to avoid accidents.

[0003] At present, when performing temperature monitoring of aircraft wheel brakes, most of the monitored temperature data will be temperature calibrated to reduce measurement errors. Among them, the prior art usually obtains multiple standard measurement values ​​of the sensor to be calibrated and their corresponding actual measurement values ​​under multiple different standard temperature values ​​when performing temperature calibration, and then determines the temperature compensation information of each standard temperature value according to the fitting processing results of the multiple standard measurement values ​​of each standard temperature value and its corresponding actual measurement value. Finally, the actual temperature data can be obtained by adding or subtracting the compensation data on the basis of the actual measurement value; however, the above method has the following shortcomings: since the temperature of the cold end of the thermocouple is not fixed, the temperature change of the cold end will cause measurement errors, and the above method does not take this factor into account (that is, it is assumed that the temperature of the cold end is fixed and calibration is performed under this condition), therefore, the accuracy of the calibrated temperature data is still not high; based on this, how to provide a high-precision temperature monitoring method for aircraft wheel brakes has become a problem to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a temperature monitoring method, device and storage medium for aircraft wheel brakes, so as to solve the problem that the accuracy of calibrated temperature data is still low in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, a temperature monitoring method for an aircraft wheel brake is provided, comprising:

[0007] Obtaining a measured voltage value and a measured temperature value, wherein the measured temperature value and the measured voltage value are respectively an actual temperature value of a cold end of the thermocouple and an actual output voltage value when the thermocouple is used to measure the temperature of a wheel brake of an aircraft;

[0008] Acquire temperature calibration data of the thermocouple, wherein the temperature calibration data includes a temperature calibration table when the cold end of the thermocouple is at different calibration temperatures, and the temperature calibration table corresponding to any calibration temperature includes the voltage value output by the thermocouple when the hot end of the thermocouple is at different temperatures and the actual temperature value of the corresponding measurement object;

[0009] Based on the measured temperature value, searching for at least one temperature calibration table matching the measured temperature value in the temperature calibration data, and searching for an actual temperature value corresponding to the measured voltage value in each temperature calibration table in the at least one temperature calibration table according to the measured voltage value;

[0010] The actual temperature of the wheel brake of the aircraft is determined by using the actual temperature values ​​found out.

[0011] Based on the above disclosed content, the present invention aims at the characteristic that the temperature change of the cold end of the thermocouple will cause measurement error, and constructs a temperature calibration table of the cold end of the thermocouple at different calibration temperatures, wherein the calibration table corresponding to any calibration temperature contains the voltage value and the actual temperature value output by the entire thermocouple when the hot end of the thermocouple measures the object to be measured when the hot end is at different temperatures; in this way, it is equivalent to obtaining the measured voltage and the actual temperature measured of the entire thermocouple when the cold end of the thermocouple is at different temperatures when the thermocouple is working; therefore, temperature correction can be performed based on the aforementioned temperature calibration tables.

[0012] Among them, in actual use, it is only necessary to first obtain the measured voltage value output by the thermocouple during actual measurement and the measured temperature value of the cold end; then, match the temperature calibration table corresponding to the measured temperature value of the cold end from each temperature calibration table; then, according to the measured voltage value, find the actual temperature value corresponding to the measured voltage value in the matched temperature calibration table; finally, using the actual temperature value found, the real temperature of the aircraft wheel brake can be obtained.

[0013] Through the above-mentioned design, the present invention fully considers the factor that the temperature of the cold end of the thermocouple will affect the measurement result, and specifically constructs a temperature calibration table when the cold end is at different calibration temperatures. In actual measurement, according to the actual temperature of the cold end of the thermocouple, the temperature calibration table corresponding to the cold end temperature is found, and based on the actual voltage output by the thermocouple, the corresponding actual temperature value is matched in the calibration table; finally, based on the matched actual temperature value, the real temperature of the aircraft brake can be obtained; therefore, compared with the traditional technology, the present invention can reduce the influence of the temperature change of the cold end of the thermocouple on the measurement result, thereby improving the measurement accuracy, and is very suitable for large-scale application and promotion in the field of aircraft brake temperature monitoring.

[0014] In one possible design, based on the measured temperature value, searching the temperature calibration data for at least one temperature calibration table that matches the measured temperature value includes:

[0015] Determine whether there is a calibration temperature that is the same as the measured temperature value among the calibration temperatures corresponding to each temperature calibration table in the temperature calibration data;

[0016] If not, determining the calibration temperature interval within which the measured temperature value lies;

[0017] The temperature calibration table corresponding to the calibration temperatures at two end points in the calibration temperature interval is used as the temperature calibration table matching the measured temperature value.

[0018] In a possible design, each temperature calibration table in the temperature calibration data is sorted in descending order of calibration temperature, wherein the method further includes:

[0019] If yes, then obtaining a previous calibration temperature of the target temperature, wherein the target temperature is a calibration temperature in the temperature calibration data that is the same as the measured temperature value;

[0020] The temperature calibration table corresponding to the target temperature and the temperature calibration table corresponding to the previous calibration temperature of the target temperature are used as the temperature calibration table matching the measured temperature value.

[0021] In a possible design, the temperature calibration tables in the temperature calibration data are sorted in descending order of calibration temperature, and the number of temperature calibration tables matched with the measured temperature value found in the temperature calibration data is 2;

[0022] Wherein, using each actual temperature value found out to determine the real temperature of the wheel brake of the aircraft comprises:

[0023] Calculate a first temperature difference between the calibration temperatures corresponding to two adjacent temperature calibration tables in the temperature calibration data, and a second temperature difference between the two actual temperature values ​​found;

[0024] Calculating a linear ratio between the thermocouple cold end temperature and the actual brake temperature based on the first temperature difference and the second temperature difference;

[0025] Based on the linear ratio and any actual temperature value found, the actual temperature of the aircraft wheel brake is determined.

[0026] In one possible design, obtaining a measured temperature value includes:

[0027] When using a thermocouple to measure the temperature of an aircraft wheel brake, obtaining a temperature voltage signal at the cold end of the thermocouple;

[0028] Based on the temperature voltage signal, the measured temperature value is calculated.

[0029] In a possible design, after obtaining the temperature voltage signal on the cold end of the thermocouple, the method further includes:

[0030] The temperature voltage signal is amplified, filtered, and converted into analog-to-digital form in sequence to obtain a digital voltage signal, so as to calculate the measured temperature value based on the digital voltage signal.

[0031] In a possible design, the temperature voltage signal at the cold end of the thermocouple is measured by an AD590 temperature sensor.

[0032] In a second aspect, a temperature monitoring device for an aircraft wheel brake is provided, comprising:

[0033] An acquisition unit, used for acquiring a measured voltage value and a measured temperature value, wherein the measured temperature value and the measured voltage value are respectively an actual temperature value of a cold end of the thermocouple and an actual output voltage value when the thermocouple is used to measure the temperature of a wheel brake of an aircraft;

[0034] The acquisition unit is further used to acquire the temperature calibration data of the thermocouple, wherein the temperature calibration data includes a temperature calibration table when the cold end of the thermocouple is at different calibration temperatures, and the temperature calibration table corresponding to any calibration temperature includes the voltage value output by the thermocouple when the hot end of the thermocouple is at different temperatures and the actual temperature value of the corresponding measurement object;

[0035] a temperature calibration unit, configured to search, based on the measured temperature value, at least one temperature calibration table matching the measured temperature value in the temperature calibration data, and search, based on the measured voltage value, for an actual temperature value corresponding to the measured voltage value in each temperature calibration table in the at least one temperature calibration table;

[0036] The temperature monitoring unit is used to determine the real temperature of the wheel brake of the aircraft by using the actual temperature values ​​found out.

[0037] In a third aspect, another temperature monitoring device for aircraft wheel brakes is provided. Taking the device as an electronic device as an example, the device includes a memory, a processor and a transceiver which are communicatively connected in sequence, wherein the memory is used to store computer programs, the transceiver is used to send and receive messages, and the processor is used to read the computer program to execute the temperature monitoring method for aircraft wheel brakes as described in the first aspect or any possible design of the first aspect.

[0038] In a fourth aspect, a storage medium is provided, on which instructions are stored. When the instructions are executed on a computer, the temperature monitoring method for aircraft wheel brakes as described in the first aspect or any possible design of the first aspect is executed.

[0039] In a fifth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, causes the computer to execute the temperature monitoring method for aircraft wheel brakes as described in the first aspect or any possible design of the first aspect.

[0040] Beneficial effects:

[0041] (1) The present invention fully considers the fact that the temperature of the cold end of the thermocouple will affect the measurement result, and specifically constructs a temperature calibration table when the cold end is at different calibration temperatures. In actual measurement, the temperature calibration table corresponding to the cold end temperature is found according to the actual temperature of the cold end of the thermocouple, and the corresponding actual temperature value is matched in the calibration table based on the actual voltage output by the thermocouple; finally, the real temperature of the aircraft brake can be obtained based on the matched actual temperature value; therefore, compared with the traditional technology, the present invention can reduce the influence of the temperature change of the cold end of the thermocouple on the measurement result, thereby improving the measurement accuracy, and is very suitable for large-scale application and promotion in the field of aircraft brake temperature monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic flow chart of the steps of a temperature monitoring method for aircraft wheel brakes provided by an embodiment of the present invention;

[0043] Figure 2 A schematic diagram of the structure of a temperature monitoring device for aircraft wheel brakes provided by an embodiment of the present invention;

[0044] Figure 3 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0046] It should be understood that although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, a first unit can be referred to as a second unit, and similarly, a second unit can be referred to as a first unit without departing from the scope of the exemplary embodiments of the present invention.

[0047] It should be understood that the term "and / or" that may appear in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" that may appear in this article describes another type of association object relationship, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " that may appear in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0048] Example:

[0049] See also Figure 1 As shown, the temperature monitoring method for aircraft wheel brakes provided in this embodiment fully considers the factor that the temperature of the cold end of the thermocouple will affect the measurement result, and specifically constructs a temperature calibration table when the cold end is at different calibration temperatures, and in actual measurement, matches the temperature calibration table corresponding to the actual temperature of the cold end of the thermocouple in the constructed multiple temperature calibration tables; then, the actual voltage value output by the thermocouple is used to find the actual temperature value corresponding to the actual voltage value in the matched temperature calibration table; finally, the actual temperature of the aircraft brake can be obtained by using the actual temperature value found; thus, the present invention can reduce the influence of the temperature change of the cold end of the thermocouple on the measurement result, thereby improving the measurement accuracy, and therefore, it is very suitable for large-scale application and promotion in the field of aircraft brake temperature monitoring; wherein, for example, the present method can be but not limited to running on the brake temperature monitoring end side, and optionally, the brake temperature monitoring end can be but not limited to a personal computer (PC), a tablet computer or a smart phone, and it can be understood that the aforementioned execution subject does not constitute a limitation on the embodiment of the present application, and accordingly, the operation steps of the present method can be but not limited to the following steps S1 to S4.

[0050] S1. Obtain a measured voltage value and a measured temperature value, wherein the measured temperature value and the measured voltage value are respectively the actual temperature value of the cold end of the thermocouple and the actual output voltage value when the thermocouple is used to measure the aircraft wheel brake temperature; in specific applications, the hot end of the thermocouple is connected to the brake disc of the aircraft wheel brake, and the cold end is connected to the brake temperature monitoring end; at the same time, for example, when using a thermocouple to measure the aircraft wheel brake temperature, it is possible but not limited to first obtaining a temperature voltage signal on the cold end of the thermocouple, and then calculating the measured temperature value based on the temperature voltage signal; of course, before transmitting the temperature voltage signal to the brake temperature monitoring end, the temperature voltage signal also needs to be amplified, filtered and analog-to-digital converted in sequence, so as to be converted into a signal that can be recognized and processed by the brake temperature monitoring end (that is, converted into a digital voltage signal), so as to derive the cold end temperature of the thermocouple based on this.

[0051] At the same time, in this embodiment, a K-type thermocouple can be used as an example to monitor the temperature of aircraft wheel brakes. Among them, the K-type thermocouple has the advantages of a wide temperature measurement range, can measure higher temperatures, is easy to measure, is convenient for long-distance transmission, and is centralized for detection and control; at the same time, it has a simple structure, stable performance, convenient maintenance, high accuracy, small thermal inertia and heat capacity, is convenient for rapid measurement, and generates voltage by itself, does not require an external driving power supply, and is a typical self-generating sensor. Therefore, it is very suitable for application in the field of aircraft wheel brake temperature monitoring.

[0052] Furthermore, for example, but not limited to, the AD590 temperature sensor can be used to measure the temperature of the cold end of the thermocouple, that is, the AD590 temperature sensor is used to obtain the temperature voltage signal on the cold end of the thermocouple; wherein, AD590 is a current integrated temperature sensor with a wide operating range (5-30V), and its output current is proportional to the temperature. It has good linearity, a temperature suitable range of -55℃-150℃, and a sensitivity of 1uA / K. It has the characteristics of high accuracy, large dynamic resistance, fast response speed, good linearity, and easy use. In addition, it also has the characteristics of adapting to power supply fluctuations, and the output current change is less than 1uA, so it is widely used in high-precision thermometers and temperature measurement. Based on this, the use of the AD590 temperature sensor for cold end temperature measurement can improve the measurement benchmark, thereby further improving the accuracy of the measurement.

[0053] After obtaining the actual voltage value output by the thermocouple during the aircraft wheel braking measurement and the actual temperature of the cold end, the temperature can be calibrated based on the pre-constructed temperature calibration table. The calibration process can be but is not limited to the following steps S2 to S4.

[0054] S2. Obtain temperature calibration data of the thermocouple, wherein the temperature calibration data includes a temperature calibration table when the cold end of the thermocouple is at different calibration temperatures, and the temperature calibration table corresponding to any calibration temperature includes the voltage value output by the thermocouple when the hot end of the thermocouple is at different temperatures and the actual temperature value of the corresponding measurement object.

[0055] In this embodiment, it is equivalent to placing the cold end of the thermocouple in a temperature box, fixing the cold end temperature, and then, by heating the hot end of the thermocouple, obtaining the voltage value output by the thermocouple and the actual temperature value of the entire measurement object; wherein, the calibration temperature can be set to several values, such as calibrating at 5 degree intervals, starting from -55 degrees until it reaches 75 degrees; at the same time, at the same calibration temperature, the voltage value output by the thermocouple (of course, it can also be the voltage value received by the brake temperature detection end) and the actual temperature of the measured object can be observed every 10°C and recorded, so that a temperature calibration table can be formed; optionally, the temperature calibration tables in the temperature calibration data are sorted in descending order according to the calibration temperature; of course, the starting point and end point of the aforementioned calibration temperature, as well as the interval, can be specifically set according to actual use, and are not limited to the aforementioned example.

[0056] Furthermore, the following provides a temperature calibration table corresponding to the thermocouple when the calibration temperature is -55°C, as shown in Table 1 below.

[0057] Table 1 is the temperature calibration table corresponding to the thermocouple when the cold end of the thermocouple is at -55℃.

[0058] Table 1

[0059]

[0060]

[0061] It can be seen from the above Table 1 that when the cold end temperature of the thermocouple is -55°C, there are actual temperatures corresponding to different voltage values; thus, the actual temperature of the aircraft wheel brake can be obtained by combining the measured voltage value and the measured temperature value obtained in the above step S1; wherein, the temperature calibration process is shown in the following steps S3 and S4.

[0062] S3. Based on the measured temperature value, at least one temperature calibration table matching the measured temperature value is searched out in the temperature calibration data, and according to the measured voltage value, an actual temperature value corresponding to the measured voltage value is searched out in each temperature calibration table in the at least one temperature calibration table; in this embodiment, for example, but not limited to, the following steps S31 to S33 may be used to search out the temperature calibration table corresponding to the measured temperature value.

[0063] S31. Determine whether there is a calibration temperature that is the same as the measured temperature value among the calibration temperatures corresponding to each temperature calibration table in the temperature calibration data.

[0064] S32. If not, determine the calibration temperature interval in which the measured temperature value is located; otherwise, obtain the previous calibration temperature of the target temperature, wherein the target temperature is the calibration temperature in the temperature calibration data that is the same as the measured temperature value.

[0065] S33. Use the temperature calibration table corresponding to the calibration temperatures at the two endpoints in the calibration temperature range as the temperature calibration table matching the measured temperature value; or use the temperature calibration table corresponding to the target temperature and the temperature calibration table corresponding to the previous calibration temperature of the target temperature as the temperature calibration table matching the measured temperature value.

[0066] The above steps S31 to S33 are described below using an example.

[0067] Assume that the measured temperature value is -4℃, that is, the cold end of the thermocouple corresponds to a temperature of -4℃ during actual operation. As mentioned above, the interval between each calibration temperature in the temperature calibration data is 5 degrees Celsius. Then, there is no calibration temperature that is the same as the measured temperature value in the temperature calibration data (that is, there are only -5℃ and 0℃). At this time, it is necessary to determine the calibration temperature range in which the measured temperature value is located, that is, the range of -5℃-0℃. Therefore, the temperature calibration table corresponding to -5℃ and the temperature calibration table corresponding to 0℃ are required as temperature calibration tables that match the measured temperature value.

[0068] Similarly, if the measured temperature value is -5℃, then the previous calibration temperature of -5℃ is obtained. At the same time, since each temperature calibration table is sorted in descending order according to the calibration temperature, the previous calibration temperature of -5℃ is 0℃; in this way, when the measured temperature value is -5℃, its corresponding temperature calibration table is also the temperature calibration table corresponding to -5℃ and 0℃.

[0069] Of course, when the measured temperature value is other values, the process of determining the temperature calibration table that matches the measured temperature value is the same as the above example, and will not be repeated here.

[0070] After finding a temperature calibration table that matches the measured temperature value from multiple temperature calibration tables, the actual temperature value corresponding to the measured voltage value can be matched from the found temperature calibration table based on the measured voltage value; the following is an example to illustrate the matching process of the above-mentioned actual temperature value.

[0071] Assuming that the measured temperature value is -4°C, the corresponding temperature calibration table is the temperature calibration table corresponding to -5°C and 0°C, which are respectively referred to as calibration table 1 and calibration table 2. Assuming that the measured voltage value is 100mv, in calibration table 1, the actual temperature value corresponding to 100mv is 75°C, and in calibration table 2, the actual temperature value corresponding to 100mv is 100°C, then the actual temperature values ​​corresponding to the measured voltage value are 75°C and 100°C; of course, when the measured voltage value is other values, the matching process of the corresponding actual temperature value is the same as the above example, which will not be repeated here.

[0072] Based on the above steps, the actual temperature value corresponding to the measured voltage value can be obtained; then, the real temperature of the aircraft wheel brake can be obtained based on the actual temperature value found, and the determination process can be but not limited to the following step S4.

[0073] S4. Using the actual temperature values ​​found, determine the actual temperature of the aircraft wheel brake; in specific implementation, for example, but not limited to, the following steps S41 to S43 can be used to obtain the actual temperature of the aircraft wheel brake.

[0074] S41. Calculate the first temperature difference between the calibration temperatures corresponding to the two adjacent temperature calibration tables in the temperature calibration data, and the second temperature difference between the two actual temperature values ​​found; in the present embodiment, the explanation is still based on the above example, wherein it has been explained above that the interval between the calibration temperatures corresponding to the two adjacent temperature calibration tables is 5°C, then the first temperature difference is 5; similarly, when the measured temperature value is -4°C, the corresponding two actual temperature values ​​are 75°C and 100°C, then the second temperature difference is 25; of course, when the interval of the calibration temperature and the actual temperature value corresponding to the measured temperature value are different, the calculation process of the above two temperature differences is the same as the above example, and will not be repeated here.

[0075] After obtaining the first temperature difference and the second temperature difference, the linear relationship between the thermocouple cold end temperature and the actual brake temperature can be determined, and the process can be but not limited to the following step S42.

[0076] S42. Based on the first temperature difference and the second temperature difference, calculate the linear ratio of the cold end temperature of the thermocouple to the actual temperature of the brake. In specific application, the above example is still used for explanation, that is, the calibration temperature interval is 5°C, and the actual temperature difference is 25 degrees. Then, the actual temperature difference is 5°C for every one degree interval. Therefore, it can be concluded that the linear ratio of the cold end temperature of the thermocouple to the actual temperature of the brake is 1 to 5. Based on this, the actual temperature of the aircraft wheel brake can be determined based on the linear ratio, wherein the process of determining the actual temperature of the aircraft wheel brake is shown in the following step S43.

[0077] S43. Based on the linear ratio and any actual temperature value found, determine the actual temperature of the aircraft wheel brake; in this embodiment, take the actual temperature value of 75°C as an example, wherein -4°C is 1 / 5 compared to the calibrated temperature of -5°C, then the temperature that needs to be corrected is: 1×5=5, on this basis, the actual temperature of the aircraft wheel brake is 75+5=80°C; similarly, if the actual temperature value is 100°C, then -4°C is 4 / 5 compared to the calibrated temperature of 0°C, at this time, the temperature that needs to be corrected is: 4×5=20, then the actual temperature of the aircraft wheel brake is 100-20=80°C.

[0078] In this way, the calculation of the actual temperature of the aircraft wheel brake is summarized as follows: if the calibrated temperature corresponding to any actual temperature value is less than the measured temperature value, then any actual temperature value plus the first compensation temperature calculated based on the linear ratio is used as the actual temperature of the aircraft wheel brake; and if the calibrated temperature corresponding to any actual temperature value is greater than the measured temperature value, then any actual temperature value minus the second compensation temperature calculated based on the linear ratio is used as the actual temperature of the aircraft wheel brake.

[0079] Thus, the temperature monitoring method for aircraft wheel brakes described in detail by the aforementioned steps S1 to S4 fully considers the factor that the temperature of the cold end of the thermocouple will affect the measurement result, and specifically constructs a temperature calibration table when the cold end is at different calibration temperatures, and in actual measurement, matches a temperature calibration table corresponding to the actual temperature of the cold end of the thermocouple in the constructed multiple temperature calibration tables; then, using the actual voltage value output by the thermocouple, find the actual temperature value corresponding to the actual voltage value in the matched temperature calibration table; finally, using the found actual temperature value, the real temperature of the aircraft brake can be obtained; thus, the present invention can reduce the influence of the temperature change of the cold end of the thermocouple on the measurement result, thereby improving the measurement accuracy, and therefore, is very suitable for large-scale application and promotion in the field of aircraft brake temperature monitoring.

[0080] like Figure 2 As shown, the second aspect of this embodiment provides a hardware device for implementing the temperature monitoring method of aircraft wheel brakes described in the first aspect of the embodiment, including:

[0081] The acquisition unit is used to acquire a measured voltage value and a measured temperature value, wherein the measured temperature value and the measured voltage value are respectively the actual temperature value of the cold end of the thermocouple and the actual output voltage value when the thermocouple is used to measure the temperature of the aircraft wheel brake.

[0082] The acquisition unit is also used to acquire the temperature calibration data of the thermocouple, wherein the temperature calibration data includes a temperature calibration table when the cold end of the thermocouple is at different calibration temperatures, and the temperature calibration table corresponding to any calibration temperature includes the voltage value output by the thermocouple when the hot end of the thermocouple is at different temperatures and the actual temperature value of the corresponding measurement object.

[0083] A temperature calibration unit is used to search for at least one temperature calibration table matching the measured temperature value in the temperature calibration data based on the measured temperature value, and to search for an actual temperature value corresponding to the measured voltage value in each temperature calibration table in the at least one temperature calibration table according to the measured voltage value.

[0084] The temperature monitoring unit is used to determine the real temperature of the wheel brake of the aircraft by using the actual temperature values ​​found out.

[0085] The working process, working details and technical effects of the device provided in this embodiment can be found in the first aspect of the embodiment and will not be described in detail here.

[0086] like Figure 3 As shown, the third aspect of this embodiment provides another temperature monitoring device for aircraft wheel brakes. Taking the device as an electronic device as an example, it includes: a memory, a processor and a transceiver that are communicatively connected in sequence, wherein the memory is used to store computer programs, the transceiver is used to send and receive messages, and the processor is used to read the computer program to execute the temperature monitoring method for aircraft wheel brakes as described in the first aspect of the embodiment.

[0087] For example, the memory may include, but is not limited to, random access memory (RAM), read only memory (ROM), flash memory, first input first output (FIFO) and / or first in last out (FILO), etc. Specifically, the processor may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). At the same time, the processor may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state.

[0088] In some embodiments, the processor may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. For example, the processor may not be limited to a microprocessor of the STM32F105 series, a reduced instruction set computer (RISC) microprocessor, an X86 architecture processor, or a processor with an integrated embedded neural network processing unit (NPU); the transceiver may be, but is not limited to, a wireless fidelity (WIFI) wireless transceiver, a Bluetooth wireless transceiver, a general packet radio service technology (General Packet Radio Service, GPRS) wireless transceiver, a ZigBee protocol (a low-power local area network protocol based on the IEEE802.15.4 standard, ZigBee) wireless transceiver, a 3G transceiver, a 4G transceiver and / or a 5G transceiver, etc. In addition, the device may also include, but is not limited to, a power module, a display screen, and other necessary components.

[0089] The working process, working details and technical effects of the electronic device provided in this embodiment can be found in the first aspect of the embodiment and will not be described in detail here.

[0090] A fourth aspect of this embodiment provides a storage medium storing instructions for the temperature monitoring method for aircraft wheel brakes as described in the first aspect of the embodiment, that is, the storage medium stores instructions, and when the instructions are run on a computer, the temperature monitoring method for aircraft wheel brakes as described in the first aspect of the embodiment is executed.

[0091] The storage medium refers to a carrier for storing data, which may include but is not limited to a floppy disk, a CD, a hard disk, a flash memory, a USB flash drive and / or a memory stick, and the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.

[0092] The working process, working details and technical effects of the storage medium provided in this embodiment can be found in the first aspect of the embodiment and will not be described in detail here.

[0093] A fifth aspect of the present embodiment provides a computer program product comprising instructions, which, when executed on a computer, causes the computer to execute the aircraft wheel brake temperature monitoring method as described in the first aspect of the embodiment, wherein the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.

[0094] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A temperature monitoring method for aircraft wheel brakes, characterized in that: include: Obtaining a measured voltage value and a measured temperature value, wherein the measured temperature value and the measured voltage value are respectively an actual temperature value of a cold end of a thermocouple and an actual output voltage value when a thermocouple is used to measure the temperature of a wheel brake of an aircraft; Acquire temperature calibration data of the thermocouple, wherein the temperature calibration data includes a temperature calibration table when the cold end of the thermocouple is at different calibration temperatures, and the temperature calibration table corresponding to any calibration temperature includes the voltage value output by the thermocouple when the hot end of the thermocouple is at different temperatures and the actual temperature value of the corresponding measurement object; Based on the measured temperature value, searching for at least one temperature calibration table matching the measured temperature value in the temperature calibration data, and searching for an actual temperature value corresponding to the measured voltage value in each temperature calibration table in the at least one temperature calibration table according to the measured voltage value; Using the actual temperature values ​​found, determining the actual temperature of the aircraft wheel brake; The temperature calibration tables in the temperature calibration data are sorted in descending order of calibration temperature, and the number of temperature calibration tables matched with the measured temperature value found in the temperature calibration data is 2; Wherein, using each actual temperature value found out to determine the real temperature of the wheel brake of the aircraft comprises: Calculate a first temperature difference between the calibration temperatures corresponding to two adjacent temperature calibration tables in the temperature calibration data, and a second temperature difference between the two actual temperature values ​​found; Calculating a linear ratio between the cold end temperature of the thermocouple and the actual brake temperature based on the first temperature difference and the second temperature difference; Determining the actual temperature of the aircraft wheel brake based on the linear ratio and any actual temperature value found; Based on the measured temperature value, searching the temperature calibration data for at least one temperature calibration table that matches the measured temperature value comprises: Determine whether there is a calibration temperature that is the same as the measured temperature value among the calibration temperatures corresponding to each temperature calibration table in the temperature calibration data; If not, determining the calibration temperature interval in which the measured temperature value lies; Using the temperature calibration table corresponding to the calibration temperatures at two endpoints in the calibration temperature interval as the temperature calibration table matching the measured temperature value; The temperature calibration tables in the temperature calibration data are sorted in descending order of calibration temperature, wherein the method further comprises: If yes, then obtaining a previous calibration temperature of the target temperature, wherein the target temperature is a calibration temperature in the temperature calibration data that is the same as the measured temperature value; The temperature calibration table corresponding to the target temperature and the temperature calibration table corresponding to the previous calibration temperature of the target temperature are used as the temperature calibration table matching the measured temperature value.

2. The method according to claim 1, characterized in that Get the measured temperature value, including: When using a thermocouple to measure the temperature of an aircraft wheel brake, obtaining a temperature voltage signal at the cold end of the thermocouple; Based on the temperature voltage signal, the measured temperature value is calculated.

3. The method according to claim 2, characterized in that After obtaining the temperature voltage signal on the cold end of the thermocouple, the method further includes: The temperature voltage signal is amplified, filtered, and converted into analog-to-digital form in sequence to obtain a digital voltage signal, so as to calculate the measured temperature value based on the digital voltage signal.

4. The method according to claim 2, characterized in that: The temperature voltage signal on the cold end of the thermocouple is measured by an AD590 temperature sensor.

5. A temperature monitoring device for aircraft wheel brakes, characterized in that: include: An acquisition unit, used for acquiring a measured voltage value and a measured temperature value, wherein the measured temperature value and the measured voltage value are respectively an actual temperature value of a cold end of a thermocouple and an actual output voltage value when a thermocouple is used to measure the temperature of a wheel brake of an aircraft; The acquisition unit is further used to acquire the temperature calibration data of the thermocouple, wherein the temperature calibration data includes a temperature calibration table when the cold end of the thermocouple is at different calibration temperatures, and the temperature calibration table corresponding to any calibration temperature includes the voltage value output by the thermocouple when the hot end of the thermocouple is at different temperatures and the actual temperature value of the corresponding measurement object; a temperature calibration unit, configured to search, based on the measured temperature value, at least one temperature calibration table matching the measured temperature value in the temperature calibration data, and search, based on the measured voltage value, for an actual temperature value corresponding to the measured voltage value in each temperature calibration table in the at least one temperature calibration table; A temperature monitoring unit, used to determine the actual temperature of the wheel brake of the aircraft by using the actual temperature values ​​found out; The temperature calibration tables in the temperature calibration data are sorted in descending order of calibration temperature, and the number of temperature calibration tables matched with the measured temperature value found in the temperature calibration data is 2; Wherein, using each actual temperature value found out to determine the real temperature of the wheel brake of the aircraft comprises: Calculate a first temperature difference between the calibration temperatures corresponding to two adjacent temperature calibration tables in the temperature calibration data, and a second temperature difference between the two actual temperature values ​​found; Calculating a linear ratio between the cold end temperature of the thermocouple and the actual brake temperature based on the first temperature difference and the second temperature difference; Determining the actual temperature of the aircraft wheel brake based on the linear ratio and any actual temperature value found; Based on the measured temperature value, searching the temperature calibration data for at least one temperature calibration table that matches the measured temperature value comprises: Determine whether there is a calibration temperature that is the same as the measured temperature value among the calibration temperatures corresponding to each temperature calibration table in the temperature calibration data; If not, determining the calibration temperature interval in which the measured temperature value lies; Using the temperature calibration table corresponding to the calibration temperatures at two endpoints in the calibration temperature interval as the temperature calibration table matching the measured temperature value; The temperature calibration tables in the temperature calibration data are sorted in descending order of calibration temperature, and further include: If yes, then obtaining a previous calibration temperature of the target temperature, wherein the target temperature is a calibration temperature in the temperature calibration data that is the same as the measured temperature value; The temperature calibration table corresponding to the target temperature and the temperature calibration table corresponding to the previous calibration temperature of the target temperature are used as the temperature calibration table matching the measured temperature value.

6. A temperature monitoring device for aircraft wheel brakes, characterized in that: include: A memory, a processor and a transceiver which are sequentially connected in communication, wherein the memory is used to store a computer program, the transceiver is used to send and receive messages, and the processor is used to read the computer program to execute the temperature monitoring method for aircraft wheel brakes according to any one of claims 1 to 4.

7. A storage medium, characterized in that: The storage medium stores instructions, and when the instructions are executed on a computer, the temperature monitoring method for aircraft wheel brakes according to any one of claims 1 to 4 is executed.

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