Heating element surface load test system, method, device, equipment and medium

Abstract

The invention discloses a heating element surface load test system, method, device, equipment and medium, the system comprises a heating furnace, the heating furnace is internally provided with a closed heating space, and the heating space is used for placing a heating element; the output end of the power-on control subsystem is connected to the two ends of the heating element respectively, so that a power-on loop is formed on the heating element; the power-on control subsystem is at least used for controlling current and voltage in the power-on loop; and the output end of the heat compensation control subsystem is connected with the heating furnace, and the heat compensation control subsystem is used for controlling the environment temperature in the heating space. Visibly, by arranging the closed heating space in the heating furnace, the working condition environment of the heating element in practical application can be effectively simulated, the current and voltage in the electrifying loop are controlled by means of the electrifying control subsystem, and the surface load of the heating element is flexibly adjusted; and the adaptability and the accuracy of related performance test results of the surface load of the heating element are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of component testing, in particular to a heating element surface load testing system, method, device, equipment and medium. BACKGROUND

[0002] Traditional electric heating test equipment cannot simulate the application scenarios of temperature fluctuation and surface load dynamic change in actual complex working conditions, thereby limiting the adaptability of test results. Therefore, how to improve the adaptability of test results is a technical problem to be solved at present. SUMMARY

[0003] The embodiments of the present application provide a heating element surface load testing system, method, device, equipment and medium, solve the technical problem that the traditional electric heating test equipment in the prior art cannot simulate the application scenarios of temperature fluctuation and surface load dynamic change in actual complex working conditions, and achieve the technical effect of improving the adaptability of test results.

[0004] In a first aspect, the present application provides a heating element surface load testing system, comprising: a heating furnace, an airtight heating space is arranged in the heating furnace, and the heating space is used for arranging a heating element; a power-on control subsystem, output ends of the power-on control subsystem are connected to two ends of the heating element respectively to form a power-on loop on the heating element, and the power-on control subsystem is used for controlling current and voltage in the power-on loop; a heat compensation control subsystem, an output end of the heat compensation control subsystem is connected to the heating furnace, and the heat compensation control subsystem is used for controlling the ambient temperature in the heating space.

[0005] In some embodiments of the present application, based on the foregoing scheme, the device further comprises a current detection component and a voltage detection component; The current detection component and the voltage detection component are electrically connected to the power-on control subsystem, the current detection component is used for detecting the current in the power-on loop, and the voltage detection component is used for detecting the voltage in the power-on loop.

[0006] In some embodiments of the present application, based on the foregoing scheme, the heating furnace comprises a resistance wire, the resistance wire is uniformly arranged on the inner wall of the heating space, and the resistance wire is connected to the output end of the heat compensation control subsystem.

[0007] In a second aspect, the present application provides a heating element surface load testing method, which is matched with the heating element surface load testing system provided in the first aspect, and the method comprises: connecting two ends of a heating element to be tested to output ends of a power-on control subsystem respectively, arranging the heating element to be tested in a heating space, and making the heating element to be tested, the power-on control subsystem and the heating furnace satisfy a pre-test state. obtaining preset test data of the current test, and controlling the power-on control subsystem and the heat compensation control subsystem according to the preset test data; In the case that the actual test data meets the preset test data, monitoring the test result data of the heating element under the current test.

[0008] In some embodiments of the present application, based on the foregoing scheme, the preset test data is obtained by the following steps: obtaining a surface load correlation relationship matched with the material characteristics of the heating element to be tested, obtaining the actual length and the actual diameter of the heating element to be tested, and obtaining the first test surface load, the second test surface load and the test temperature corresponding to the current test; determining the first test current according to the actual length, the actual diameter, the surface load correlation relationship and the first test surface load; determining the second test current according to the actual length, the actual diameter, the surface load correlation relationship and the second test surface load; and the preset test data includes the test temperature, the first test current and the second test current.

[0009] In some embodiments of the present application, based on the foregoing scheme, controlling the power-on control subsystem and the heat compensation control subsystem according to the preset test data includes: controlling the actual current output by the power-on control subsystem into the power-on loop according to the first test current; controlling the heat compensation control subsystem according to the test temperature, and increasing the actual temperature in the heating space to the test temperature and maintaining it; In the case that the actual temperature in the heating space reaches the test temperature, controlling the actual current output by the power-on control subsystem into the power-on loop according to the second test current.

[0010] In some embodiments of the present application, based on the foregoing scheme, increasing the actual temperature in the heating space to the test temperature and maintaining it includes: increasing the actual temperature in the heating space to the test temperature within a first preset time; the test temperature and the first preset time are matched with the limit use state of the material characteristics of the heating element to be tested.

[0011] In a third aspect, the present application provides a heating element surface load test device, which is matched with the heating element surface load test system provided in the first aspect, and the device includes: a pre-test state control module, configured to connect two ends of the heating element to be tested to the output end of the power-on control subsystem respectively, and place the heating element to be tested in the heating space, so that the heating element to be tested, the power-on control subsystem and the heating furnace meet the pre-test state; A test control module is configured to acquire preset test data of a current test, and control the power-on control subsystem and the heat compensation control subsystem according to the preset test data. A result monitoring module is configured to monitor test result data of the heating element under the current test when the actual test data meets the preset test data.

[0012] In a fourth aspect, the present application provides an electronic device, comprising: a processor; a memory for storing processor-executable instructions; The processor is configured to execute to implement the heating element surface load test method provided in the second aspect.

[0013] In a fifth aspect, the present application provides a non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by the processor of the electronic device, the electronic device can execute the heating element surface load test method provided in the second aspect.

[0014] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: The embodiments of the present application provide a heating element surface load test system, which comprises a heating furnace, a closed heating space is arranged in the heating furnace, and the heating space is used for placing a heating element; a power-on control subsystem, output ends of the power-on control subsystem are connected to two ends of the heating element respectively to form a power-on loop on the heating element; the power-on control subsystem is used for controlling at least the current and voltage in the power-on loop; and a heat compensation control subsystem, an output end of the heat compensation control subsystem is connected to the heating furnace, and the heat compensation control subsystem is used for controlling the ambient temperature in the heating space. It can be seen that, by arranging the closed heating space in the heating furnace, the embodiments of the present application can effectively simulate the working condition environment of the heating element in the actual application, and reduce the test result deviation caused by the difference between the test environment and the actual scene. With the control of the power-on control subsystem on the current and voltage in the power-on loop of the heating element, the surface load of the heating element can be flexibly adjusted to meet different test requirements and break through the limitation of the fixed surface load of the traditional equipment. At the same time, the heat compensation control subsystem can accurately control the ambient temperature in the heating space to ensure that the test process is carried out under stable temperature conditions, guarantee the consistency of the test conditions, and further improve the accuracy and reliability of the test results, thereby providing strong support for the accurate evaluation of the surface load related performance of the heating element. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0016] Figure 1 A structural schematic diagram of a heating element surface load test system provided by an embodiment of the present application is shown in the following figure. Figure 2 A flowchart of a heating element surface load test method provided by an embodiment of the present application is shown in the following figure. Figure 3 A structural schematic diagram of a heating element surface load test device provided by an embodiment of the present application is shown in the following figure. Figure 4 A structural schematic diagram of an electronic device provided by an embodiment of the present application is shown in the following figure. In the above figure: 11, heating furnace; 111, resistance wire; 12, power-on control subsystem; 13, heat compensation control subsystem; 2, heating element. DETAILED DESCRIPTION

[0017] The present application provides a heating element surface load test system, which solves the technical problem that the conventional electric heating test equipment in the prior art cannot simulate the application scenarios of temperature fluctuation and surface load dynamic change in actual complex working conditions.

[0018] The technical solution of the present application is as follows to solve the above technical problem: The embodiment of the application provides a heating element surface load test system, comprising: a heating furnace, a closed heating space is arranged in the inside of the heating furnace, and the heating space is used for arranging a heating element; a power-on control subsystem, output ends of the power-on control subsystem are connected to two ends of the heating element respectively, so as to form a power-on loop on the heating element; the power-on control subsystem is used at least for controlling current and voltage in the power-on loop; a heat compensation control subsystem, an output end of the heat compensation control subsystem is connected with the heating furnace, and the heat compensation control subsystem is used for controlling the ambient temperature in the heating space. It can be seen that, by arranging the closed heating space in the heating furnace, the embodiment of the application can effectively simulate the working condition environment in the actual application of the heating element, and reduce the deviation of the test result caused by the difference between the test environment and the actual scene. With the control of the power-on control subsystem on the current and voltage in the power-on loop of the heating element, the surface load of the heating element can be flexibly adjusted, different test requirements can be met, and the limitation of the fixed surface load of the traditional equipment is broken. Meanwhile, the heat compensation control subsystem can accurately control the ambient temperature in the heating space, ensure that the test process is carried out under stable temperature conditions, guarantee the consistency of the test conditions, and then improve the accuracy and reliability of the test result, and provide strong support for the accurate evaluation of the surface load related performance of the heating element.

[0019] In order to better understand the above technical solutions, the above technical solutions will be described in detail in combination with the drawings of the specification and specific embodiments.

[0020] Firstly, it should be explained that the term "and / or" appearing in the present text is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present text generally represents that the front and rear associated objects are in an "or" relationship.

[0021] The electric heating alloy wire is widely used in industrial heating, household appliances and new energy thermal management fields due to the characteristics of high temperature resistance and oxidation resistance, and the surface load as a key parameter for measuring the thermal efficiency and reliability has an important influence on the use cost and service life.

[0022] Traditional electric heating devices usually work at a fixed voltage or current, and the diameter and length of the electric heating alloy wire are fixed, and the surface load is determined by the resistivity, diameter and length of the alloy wire. Therefore, the surface load cannot be adjusted according to the dynamic requirements of the actual application scene, and it is difficult to adapt to different surface load test requirements of multi-specification alloy wires during service, resulting in low efficiency or insufficient reliability in complex working condition scenes. The existing rapid life test equipment used in the surface load experiment of the electric heating alloy wire cannot simulate the requirements of temperature fluctuation and dynamic thermal load in the actual complex working condition, and the test is usually carried out in an open atmospheric environment, which is significantly different from the high-temperature sealed environment of the actual work of the alloy wire, thereby limiting the accuracy of the test results and the actual guiding value.

[0023] To solve the above problems, an embodiment of the present application provides a heating element surface load test system. As shown in Figure 1 , it is a structure diagram of a heating element surface load test system provided by an embodiment of the present application, which comprises a heating furnace 11, an energization control subsystem 12 Figure 1 (in a dashed box, the specific circuit structure is not shown) and a heat compensation control subsystem 13 Figure 1 (in a dashed box, the specific circuit structure is not shown).

[0024] It should be noted that in Figure 1 , the green pattern represents the structure of the heating element 2. The heating element 2 is a kind of device that can convert energy (such as electrical energy, electromagnetic energy, etc.) into heat energy, and then heat other objects. Common heating elements 2 include resistive heating elements (such as electric heating alloy wires, resistance strips, ceramic heating elements, etc.), induction heating elements, infrared heating elements, etc.

[0025] The inside of the heating furnace 11 is provided with a sealed heating space, and the heating space is used to accommodate the heating element (for example, a heating element with a wire diameter of 0.01-140mm and a length of 300mm-1800mm). The heating space is designed as a sealed space, so that the heat is not easily lost, thereby simulating the real heating environment. The heating furnace 11 also includes a resistance wire 111, which is uniformly arranged on the inner wall of the heating space. The resistance wire 111 is connected with the output end of the heat compensation control subsystem 13, and the heat compensation control subsystem 13 compensates the heat of the heating space through the resistance wire 111 (for example, the heating temperature range of the electric heating wire 111 is 100-1500℃), maintains or adjusts the environmental temperature, so that the test can be carried out under controllable temperature conditions, and the influence of external factors on the test results is reduced.

[0026] The power-on control subsystem 12 is responsible for providing power to the heating element 2 and controlling the current and voltage in the power-on loop (for example, controllable current range 0.1-50A, controllable voltage range 1-220V), while integrating detection components for monitoring electrical parameters. Specifically, the output ends of the power-on control subsystem 12 are respectively connected to the two ends of the heating element 2 to form a power-on loop on the heating element 2, and the power-on control subsystem 12 is at least used to control the current and voltage in the power-on loop. By adjusting the current and voltage, the performance of the heating element 2 under different working conditions can be simulated. The device also includes a current detection component and a voltage detection component (not shown in the figure), both of which are electrically connected to the power-on control subsystem 12. The current detection component is used to detect the current in the power-on loop, and the voltage detection component is used to detect the voltage in the power-on loop. These data are used to calculate the surface load of the heating element 2 (for example, the surface load of the heating element 2 can be controlled in the range of 0.1-25W / cm 2 ), to improve the accuracy of the test.

[0027] The heat compensation control subsystem 13 is independent of the power-on control subsystem 12 and is specifically used to control the environmental temperature in the heating furnace 11, and the heat compensation is realized by the resistance wire 111 of the heating furnace 11. The output end of the heat compensation control subsystem 13 is connected to the heating furnace 11, and by controlling the heating power of the resistance wire 111, the environmental temperature in the heating space is controlled, so that the test can be carried out under constant temperature or variable temperature conditions. For example, during the test, the change of the environmental temperature may affect the heat dissipation, and the heat compensation control subsystem 13 can compensate for such heat loss, so that the test conditions are stable.

[0028] After the above introduction of the heating element surface load test system, the embodiment of the present application also provides a heating element surface load test method, which matches the heating element surface load test system provided by the embodiment of the present application. As shown in Figure 2 , it is a flowchart of a heating element surface load test method provided by the embodiment of the present application, which includes steps S1-S3.

[0029] Step S1, connect the two ends of the heating element to be tested to the output ends of the power-on control subsystem 12 respectively, and place the heating element to be tested in the heating space, so that the heating element to be tested, the power-on control subsystem 12 and the heating furnace 11 meet the pre-test state; Step S2, obtain the preset test data of the current test, and control the power-on control subsystem 12 and the heat compensation control subsystem 13 according to the preset test data; Step S3, monitor the test result data corresponding to the current test of the heating element to be tested under the condition that the actual test data meets the preset test data.

[0030] As to step S1, the two ends of the heating element to be tested are connected to the output terminals of the power-on control subsystem 12, and the heating element to be tested is placed in the heating space, so that the heating element to be tested, the power-on control subsystem 12, and the heating furnace 11 meet a pre-test state.

[0031] The pre-test state refers to that, before formally starting the test and collecting data, the heating element to be tested, the power-on control subsystem 12, and the heating furnace 11 have completed all necessary physical connections and environmental settings, and have reached a state of stability, readiness, and compliance with the initial requirements of the test scheme.

[0032] For example, the heating element to be tested has established a complete, reliable, and well-insulated electrical circuit with the power-on control subsystem 12. The connection of the two ends of the heating element to be tested to the output terminals of the power-on control subsystem 12 must be firm and well-conductive (without problems such as looseness, virtual connection, oxidation, and the like affecting conduction), to ensure that the power-on control subsystem 12 can effectively output current and voltage to the heating element, forming a complete power-on circuit.

[0033] The heating element to be tested is correctly placed in the heating space of the heating furnace 11, and the heating element to be tested maintains a safe distance from the resistance wire 111 of the inner wall of the heating furnace 11, to avoid direct contact causing local overheating or short circuit. The ambient temperature in the heating space (usually pre-set by the heat compensation control subsystem 13) has reached and stabilized at the initial temperature (such as room temperature, or a certain specific starting temperature) required by the test scheme.

[0034] The power-on control subsystem 12 needs to be in standby state, and can receive and execute pre-set current and voltage control instructions (such as normal fault alarm and parameter adjustment function). The heat compensation control subsystem 13 needs to be normally connected to the resistance wire 111 in the heating furnace 11, and be in standby state, and can respond to ambient temperature adjustment instructions (such as being able to normally control the resistance wire 111 to generate heat, thereby adjusting the temperature of the heating space).

[0035] Specifically, two electrodes or two ends of the heating element to be tested are connected to the positive and negative output terminals of the power-on control subsystem 12 respectively using appropriate wires or other means to form a complete power-on circuit. At the same time, the connected heating element is placed in the correct position in the closed heating space of the heating furnace 11, for example, without contacting the furnace wall (especially the supplemental heating resistance wire 111 on the inner wall). The ambient temperature in the heating space of the heating furnace 11 is set and stabilized at the initial temperature required for this test by the supplemental heating control subsystem 13. For example, if the test requires to start from room temperature, the supplemental heating control subsystem 13 needs to ensure that it does not add extra heating. In the power-on control subsystem 12, the initial electrical parameters (for example, a lower initial voltage or current value) are input according to the preset test data, and full load power is usually not applied immediately to avoid excessive electrical stress on the system before it is fully stabilized, thereby protecting the tested element and equipment.

[0036] Regarding step S2, the preset test data for the current test is obtained, and the power-on control subsystem 12 and the supplemental heating control subsystem 13 are controlled according to the preset test data.

[0037] The preset test data is a set of key parameters for controlling the test process before testing the heating element, which is set in advance according to the test target, the characteristics of the heating element to be tested, and the test specification, and provides clear execution basis for the power-on control subsystem 12 (controlling the heating element power-on current) and the supplemental heating control subsystem 13 (maintaining the required temperature for testing), ensuring that the test is orderly carried out according to the preset scheme. According to the test requirements, this data specifically includes three contents: the target temperature (test temperature) to be maintained during the test, the first group of current values (first test current) for controlling the power-on of the heating element during the test, and the second group of current values (second test current) for controlling the power-on of the heating element during the test.

[0038] Specifically, the preset test data is obtained through steps S211-S213.

[0039] Step S211: Obtain the surface load correlation relationship matching the material characteristics of the heating element to be tested, obtain the actual length and actual diameter of the heating element to be tested, and obtain the first test surface load, the second test surface load, and the test temperature corresponding to the current test; Step S212: Determine the first test current according to the actual length, the actual diameter, the surface load correlation relationship, and the first test surface load; Step S213: Determine the second test current according to the actual length, the actual diameter, the surface load correlation relationship, and the second test surface load; the preset test data includes the test temperature, the first test current, and the second test current.

[0040] As to step S211, a surface load correlation relation matching the material characteristics of the heating element to be tested is acquired, the actual length and the actual diameter of the heating element to be tested are acquired, and the first test surface load, the second test surface load and the test temperature corresponding to the current test are acquired.

[0041] The surface load correlation relation refers to the quantitative relation between the surface load of the heating element to be tested and its own electrical parameters (current, voltage), geometric parameters (length, diameter) and material characteristics (resistivity, etc.), which differs due to different material characteristics (i.e. matching the material characteristics). The resistivity, high-temperature resistance and heat dissipation characteristics of different materials (such as nickel-chromium alloy, iron-chromium-aluminum alloy and ceramic) are different, and the power generated under the same current and the surface load per unit area are also different. For example, a certain type of metal alloy can withstand a higher surface load, while another type of ceramic material can only withstand a lower surface load. Therefore, for specific material characteristics, a corresponding rule is established in advance that when the heating element to be tested is at a certain surface load and has a certain size, how much current needs to be passed in to achieve the surface load, which is the surface load correlation relation matching the material characteristics.

[0042] As to step S212, the first test current is determined according to the actual length, the actual diameter, the surface load correlation relation and the first test surface load.

[0043] Specifically, first, the actual length (the real length of the element itself) and the actual diameter (the real diameter of the cross section of the element) of the heating element to be tested are used to determine the first test surface load (the unit area heat generating power required for the first group of tests) corresponding to the current test, and the surface load correlation relation matching the material characteristics of the heating element to be tested is retrieved. Then, the actual length and the actual diameter are substituted into the surface load correlation relation, and the first test surface load requirement is combined to determine the current value that can make the heating element reach the first test surface load under the size through the corresponding rule of the surface load correlation relation, which is the first test current.

[0044] As to step S213, the second test current is determined according to the actual length, the actual diameter, the surface load correlation relation and the second test surface load; and the test data includes the test temperature, the first test current and the second test current.

[0045] In accordance with the determination logic of the first test current, the second test surface load corresponding to the current test (unit area heat power required for the second group of tests) is also determined according to the actual length and actual diameter of the heating element to be tested, and the surface load correlation relationship matching the material characteristics is used. Then, the actual length and actual diameter are substituted into the surface load correlation relationship, and the second test surface load requirement is combined to determine the current value that can make the heating element to be tested reach the second test surface load under this size through the corresponding rule in the surface load correlation relationship. The current value is the second test current.

[0046] Regarding the control of the power-on control subsystem 12 and the heat compensation control subsystem 13 according to the preset test data in step S2, steps S221-S223 are included.

[0047] In step S221, the power-on control subsystem 12 is controlled to output an actual current in the power-on loop according to the first test current; In step S222, the heat compensation control subsystem 13 is controlled to raise and maintain the actual temperature in the heating space to the test temperature according to the test temperature; In step S223, the power-on control subsystem 12 is controlled to output an actual current in the power-on loop according to the second test current when the actual temperature in the heating space reaches the test temperature.

[0048] Regarding step S222, raising and maintaining the actual temperature in the heating space to the test temperature includes: raising the actual temperature in the heating space to the test temperature within a first preset time; the test temperature and the first preset time match the limit use state of the material characteristics of the heating element to be tested.

[0049] Regarding steps S221-S223, specifically, according to the first test current in the preset test data, the power-on control subsystem 12 is controlled to output an actual current of a corresponding size to the power-on loop where the heating element is located, laying a foundation for the initial current of the heating element. At the same time, according to the test temperature in the preset test data, the heat compensation control subsystem 13 is started, which will raise the actual temperature in the heating space to the test temperature within a first preset time, wherein the test temperature and the first preset time match the limit use state of the material characteristics of the heating element to be tested. After the temperature reaches the test temperature, it continues to run to maintain the temperature, ensuring that the heating space temperature is stable and meets the test requirements. When it is confirmed that the actual temperature in the heating space has reached the preset test temperature, the output of the power-on control subsystem 12 is adjusted again, the actual current in the power-on loop is switched to the second test current according to the second test current in the preset test data, and the power-on control subsystem 12 continuously outputs according to the new current requirement, thereby completing the staged and accurate control of current and temperature in the test process.

[0050] For example, four specific embodiments are provided below.

[0051] Embodiment 1 : For a Fe-Cr-Al alloy wire with a wire diameter of 1.8 mm and a length of 1200 mm, the testing process is as follows: first, the power-on control subsystem 12 outputs a first test current of 37 A, so that the alloy wire generates heat, and the surface load reaches 15 W / cm 2 (step S221). At the same time, the heat compensation control subsystem 13 starts to work, and the ambient temperature in the heating furnace 11 is raised and stabilized at a test temperature of 600°C (step S222). When the system detects that the actual temperature in the furnace accurately reaches 600°C, the power-on control subsystem 12 automatically switches the current from 37 A to a second test current of 23 A, at which time the surface load is reduced to 7 W / cm 2 (step S223) to continue the subsequent step S3.

[0052] Embodiment 2: In this embodiment, the test object is a Fe-Cr-Al alloy wire with a wire diameter of 2.0 mm and a length of 1000 mm. After the test is started, the power-on control subsystem 12 first applies a first test current of 35 A, so that the surface load of the element is raised to 10 W / cm 2 (step S221). At the same time, the heat compensation control subsystem 13 acts to heat the ambient temperature in the heating space to a higher test temperature of 700°C (step S222). After the furnace temperature is stabilized at 700°C, the power-on control subsystem 12 automatically adjusts the working current to a second test current of 31 A, and sets the surface load to 7.5 W / cm 2 (step S223) to continue the subsequent step S3.

[0053] Embodiment 3: This embodiment tests a Fe-Cr-Al alloy wire with a wire diameter of 2.0 mm but a shorter length (800 mm). At the beginning of the process, the power-on control subsystem 12 outputs a higher first test current of 54 A, so that the element quickly reaches a high surface load of 23 W / cm 2 to achieve rapid heating (step S221). The heat compensation control subsystem 13 synchronously pushes the ambient temperature to a test temperature of 800°C (step S222). When the ambient temperature of 800°C is reached, the power-on control subsystem 12 immediately reduces the current to a second test current of 32 A, and reduces the surface load to 8 W / cm 2 (step S223) to continue the subsequent step S3.

[0054] Embodiment 4: This embodiment tests a thicker and higher temperature-resistant element (wire diameter of 4.0 mm and length of 1000 mm). First, the power-on control subsystem 12 applies a first test current of 56 A to generate a surface load of 25 W / cm 2surface load (step S221), the heat-up control subsystem 13 is responsible for heating the environment to the extreme test temperature of 1000°C (step S222). After successfully bringing the temperature in the furnace to 1000°C, the power-on control subsystem 12 reduces the current to the second test current 34A, and the surface load is reduced to 9W / cm2 2 (step S223) to continue the subsequent step S3.

[0055] Regarding step S3, in the case that the actual test data meets the preset test data, the test result data corresponding to the current test of the heating element under test is monitored.

[0056] For example, after the heat-up control subsystem 13 maintains the temperature of the heating space at the test temperature, and the power-on control subsystem 12 continues to output at the second test current, it is ensured that the test environment enters a stable state (for example, in the embodiment 1, when the temperature is stable at 600°C and the current is stable at 23A), and then the monitoring is started. Secondly, in combination with the targeted monitoring equipment, the actual current value of the power-on loop and the actual voltage value across the heating element are collected in real time by using an ammeter and a voltmeter for electrical parameters such as current and voltage. For temperature parameters, a contact temperature sensor (such as a thermocouple) is attached to the surface of the heating element, or a non-contact temperature measuring instrument (such as an infrared temperature measuring instrument) is aimed at the core area of the element, and the surface temperature of the element is recorded in real time. At the same time, another temperature sensor is used to monitor the environmental temperature of the heating space. For physical deformation, the length change of the heating element is measured periodically by using a vernier caliper or an elongation measuring instrument to observe whether bending or deformation occurs. For appearance and material state, the surface of the element is periodically photographed by using a high-definition camera, or whether phenomena such as oxidation discoloration, spots, cracking, etc. are observed directly by using a magnifying glass. Finally, all monitoring data are recorded at fixed time intervals (such as every 5 minutes) to ensure that the data are continuous and complete, until the current test phase ends.

[0057] The test result data is the core information reflecting the performance and state of the heating element under test under stable test conditions, such as electrical parameter data, temperature data, physical deformation data, appearance and material state data, and stable running time data.

[0058] The electrical parameter data, i.e., the actual current of the power-on loop and the actual voltage across the heating element under test, is used to verify whether the current is stable at the second test current, and can also indirectly judge whether the resistance of the heating element under test changes. For example, in the embodiment 1, the actual voltage of the iron-chromium-aluminum alloy wire at a temperature of 600°C and a current of 23A can be recorded; in the embodiment 4, the actual voltage of the alloy wire with a wire diameter of 4.0 mm at a temperature of 1000°C and a current of 34A can be recorded, and if the voltage abnormally fluctuates, it can reflect that the heating element under test may have local overheating or material changes.

[0059] Temperature data, including the surface temperature of the heating element to be tested and the ambient temperature of the heating space, is used to confirm whether the temperature is stably maintained at the test temperature. As in Example 2, it can be recorded whether the surface temperature of the alloy wire is stably maintained at 700°C, and whether the heating space temperature is stably maintained synchronously; in Example 3, it can be recorded whether the surface temperature of the heating element to be tested is maintained at 800°C, to avoid affecting the test results due to temperature fluctuations.

[0060] Physical deformation data, i.e. the length change of the heating element to be tested during the test, whether bending or deformation occurs, is used to judge the structural stability of the heating element to be tested at high temperature. As in Example 1, the length change (such as whether it is elongated, and how much it is elongated) of the alloy wire with a wire diameter of 1.8 mm and a length of 1200 mm at 600°C can be recorded; in Example 4, it can be observed whether the alloy wire with a wire diameter of 4.0 mm appears bending, local bulging and other deformations at 1000°C.

[0061] Appearance and material state data, i.e. the appearance change of the surface of the heating element to be tested, is used to judge the oxidation resistance and material stability of the heating element to be tested. As in Example 2, it can be recorded whether the surface of the alloy wire with a wire diameter of 2.0 mm appears dark brown oxidation layer and spots at 700°C; in Example 3, it can be observed whether the surface of the alloy wire appears slight cracking or peeling at 800°C, which can reflect the high-temperature oxidation resistance of the heating element to be tested.

[0062] Stable running time data, i.e. the time for the heating element to be tested to continuously and stably work at the second test current and the test temperature, is used to judge the high-temperature life of the heating element to be tested. As in the four examples, the time from when the temperature is stably maintained at the test temperature to when the heating element to be tested first appears abnormal (such as temperature drop, current fluctuation, appearance cracking) can be recorded after the current is switched to the second test current. If the alloy wire in Example 4 can stably run for 200 hours without abnormality at 1000°C and 34A, it indicates that its high-temperature performance is better than that of the elements in other examples running at lower temperatures.

[0063] In summary, the embodiments of the present application also provide a heating element surface load test method, which comprises: connecting the two ends of the heating element to be tested to the output end of the power-on control subsystem 12 respectively, and placing the heating element to be tested in the heating space, so that the heating element to be tested, the power-on control subsystem 12 and the heating furnace 11 meet the pre-test state; obtaining the preset test data of the current test, and controlling the power-on control subsystem 12 and the heat compensation control subsystem 13 according to the preset test data; and monitoring the test result data corresponding to the current test of the heating element to be tested under the condition that the actual test data meets the preset test data.

[0064] It can be seen that the embodiment of the application first connects the to-be-tested heating element to the system and arranges it in the heating space to ensure that the initial stage of the test meets the pre-test state and lays a foundation for the specification of subsequent tests. When the preset test data is obtained, the key parameters are determined in combination with the material properties, actual size and specific test requirements of the to-be-tested heating element, so that the preset data can accurately adapt to the test requirements of different elements and avoid test deviations caused by general parameters. When the system is controlled according to the preset data, the current is regulated in stages, and the heating time and the test temperature are matched according to the limit use state of the element material properties, which not only ensures the stable maintenance of the temperature of the heating space, but also avoids damage to the element caused by improper control, and at the same time realizes accurate control of the current of the power supply loop. Finally, the test results are monitored after the actual test data meet the preset conditions, which further ensures that the test results can truly reflect the performance of the heating element under the target surface load, provides reliable method support for accurate evaluation of the surface load related performance of the heating element, and effectively improves the scientificity and accuracy of the test.

[0065] Based on the same inventive concept, the embodiment of the application also provides a heating element surface load test device as shown in Figure 3 The device is matched with the heating element surface load test system provided in the foregoing, and the device comprises: A pre-test state control module 31 is configured to connect two ends of the to-be-tested heating element to output ends of the power supply control subsystem 12, and arrange the to-be-tested heating element in the heating space, so that the to-be-tested heating element, the power supply control subsystem 12 and the heating furnace 11 meet the pre-test state. A test control module 32 is configured to obtain preset test data of the current test, and control the power supply control subsystem 12 and the heat compensation control subsystem 13 according to the preset test data. A result monitoring module 33 is configured to monitor test result data of the to-be-tested heating element under the current test when actual test data meet the preset test data.

[0066] Further, the device further comprises a preset test data determination module configured to: obtain a surface load correlation relation matched with the material properties of the to-be-tested heating element, obtain an actual length and an actual diameter of the to-be-tested heating element, and obtain a first test surface load, a second test surface load and a test temperature corresponding to the current test; determine a first test current according to the actual length, the actual diameter, the surface load correlation relation and the first test surface load; determine a second test current according to the actual length, the actual diameter, the surface load correlation relation and the second test surface load; and the preset test data comprises the test temperature, the first test current and the second test current.

[0067] Further, the test control module 32 is further configured to: control the actual current output by the energization control subsystem 12 into the energization loop according to the first test current; control the actual temperature in the heating space to rise to the test temperature and maintain the test temperature according to the test temperature control subsystem 13; control the actual current output by the energization control subsystem 12 into the energization loop according to the second test current in the case that the actual temperature in the heating space reaches the test temperature.

[0068] Further, the device further comprises a temperature rising control module configured to: cause the actual temperature in the heating space to rise to the test temperature within a first preset time; the test temperature and the first preset time are matched with the limit use state of the material characteristics of the heating element to be tested.

[0069] Based on the same inventive concept, the embodiments of the present application also provide an electronic device as shown in Figure 4 The electronic device comprises: a processor 41; a memory 42 configured to store instructions executable by the processor 41; The processor 41 is configured to execute to implement the heating element surface load test method provided in the foregoing.

[0070] Based on the same inventive concept, the embodiments of the present application also provide a non-transitory computer readable storage medium, when the instructions in the storage medium are executed by the processor of the electronic device, the electronic device can execute to implement the heating element surface load test method provided in the foregoing.

[0071] Since the electronic device introduced in the embodiments is the electronic device used to implement the information processing method in the embodiments of the present application, the specific implementation of the electronic device in the embodiments and its various forms can be understood by those skilled in the art based on the information processing method introduced in the embodiments of the present application, so the electronic device how to implement the method in the embodiments of the present application will not be introduced in detail here. As long as the electronic device used to implement the information processing method in the embodiments of the present application is implemented by those skilled in the art, it belongs to the scope of the present application.

[0072] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

[0073] The present application is described in reference to the flowchart and / or block diagrams of the methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart and / or block diagrams, and combinations of blocks in the flowchart and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart and / or block diagram block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for carrying out the function specified by the block or blocks.

[0074] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the flowchart and / or block diagram block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for carrying out the function specified by the block or blocks.

[0075] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the flowchart and / or block diagram block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for carrying out the function specified by the block or blocks.

[0076] While preferred embodiments of the application have been described, it should be apparent that further modifications and improvements can occur to those skilled in the art once instructed by the foregoing disclosure. Accordingly, it is intended that the scope of the application be limited only by the appended claims and their equivalents.

[0077] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A surface load testing system for heating elements, characterized in that, include: A heating furnace, wherein the interior of the heating furnace is provided with a sealed heating space for housing the heating element; A power-on control subsystem, the output terminals of which are respectively connected to the two ends of the heating element to form a power-on circuit on the heating element; the power-on control subsystem is at least used to control the current and voltage in the power-on circuit; A supplementary heating control subsystem is provided, the output of which is connected to the heating furnace. The supplementary heating control subsystem is used to control the ambient temperature within the heating space.

2. The surface load testing system for heating elements as described in claim 1, characterized in that, The device also includes a current detection component and a voltage detection component; Both the current detection component and the voltage detection component are electrically connected to the power-on control subsystem. The current detection component is used to detect the current in the power-on circuit, and the voltage detection component is used to detect the voltage in the power-on circuit.

3. The surface load testing system for heating elements as described in claim 1, characterized in that, The heating furnace includes resistance wires, which are evenly distributed on the inner wall of the heating space; the resistance wires are connected to the output terminal of the supplementary heating control subsystem.

4. A method for testing the surface load of a heating element, characterized in that, The method is compatible with the heating element surface load testing system according to any one of claims 1-3, and the method includes: Connect the two ends of the heating element under test to the output terminals of the power control subsystem, and place the heating element under test in the heating space so that the heating element under test, the power control subsystem, and the heating furnace meet the pre-test state. Obtain the preset test data for the current test, and control the power-on control subsystem and the heat replenishment control subsystem according to the preset test data; If the actual test data meets the preset test data, monitor the test result data of the heating element under test under the current test.

5. The method for testing the surface load of a heating element as described in claim 4, characterized in that, The preset test data is obtained through the following steps: Obtain the surface load correlation that matches the material properties of the heating element under test, obtain the actual length and actual diameter of the heating element under test, and obtain the first test surface load, the second test surface load, and the test temperature corresponding to the current test. The first test current is determined based on the actual length, the actual diameter, the surface load correlation, and the first test surface load. The second test current is determined based on the actual length, the actual diameter, the surface load correlation, and the second test surface load. The preset test data includes the test temperature, the first test current, and the second test current.

6. The method for testing the surface load of a heating element as described in claim 5, characterized in that, The step of controlling the power-on control subsystem and the heat replenishment control subsystem according to the preset test data includes: The actual current output from the power-on control subsystem to the power-on circuit is controlled according to the first test current. The heating control subsystem is controlled according to the test temperature to increase the actual temperature in the heating space and maintain it at the test temperature. When the actual temperature in the heating space reaches the test temperature, the actual current output by the power-on control subsystem to the power-on circuit is controlled according to the second test current.

7. The method for testing the surface load of a heating element as described in claim 6, characterized in that, The step of raising the actual temperature within the heating space and maintaining it at the test temperature includes: The actual temperature within the heating space is raised to the test temperature within a first preset time period; the test temperature and the first preset time period are matched with the extreme use state of the material properties of the heating element under test.

8. A device for testing the surface load of a heating element, characterized in that, The device is compatible with the heating element surface load testing system according to any one of claims 1-3, and the device comprises: The pre-test state control module is used to connect the two ends of the heating element under test to the output terminals of the power-on control subsystem, and place the heating element under test in the heating space, so that the heating element under test, the power-on control subsystem, and the heating furnace meet the pre-test state. The test control module is used to acquire the preset test data of the current test and control the power-on control subsystem and the heat replenishment control subsystem according to the preset test data; The result monitoring module is used to monitor the test result data of the heating element under test under the current test, provided that the actual test data meets the preset test data.

9. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute a method for testing the surface load of a heating element as described in any one of claims 4 to 7.

10. A non-transitory computer-readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform a method for testing the surface load of a heating element as claimed in any one of claims 4 to 7.

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