Heating element material testing device and method and storage medium

Abstract

The invention relates to the technical field of heating element detection, and discloses a heating element material testing device and method and a storage medium, and the heating element material testing method comprises the steps: obtaining a testing mode and testing parameters; when a test instruction is received, initial resistance value detection is carried out on the heating body material; and when the heating element material passes the initial resistance value detection, performing a power calibration test and / or a power-on test on the heating element material according to the test mode and the test parameters, and displaying a test result. According to the technical scheme, by flexibly setting the test mode and the test parameters, accurate detection and performance evaluation of the heating element material are achieved, and reliable reference data can be provided for subsequent tests through initial resistance detection; the power calibration test ensures the consistency of the heating body under different power conditions, and the power-on test simulates the performance in an actual working state, so that whether the material of the heating body meets the design requirements or not can be quickly judged, and an efficient and reliable solution is provided for product quality control.

Description

Technical Field

[0001] The present invention relates to the technical field of heating element detection, and in particular to a heating element material testing device, method and storage medium. Background Art

[0002] In the existing production of electrical equipment, the initial resistance detection is usually only a simple measurement through an ammeter. This detection method often results in a high resistance defect rate in the power-on test performed after the production line is assembled. The main reason is that the ammeter can only roughly detect the resistance value and cannot effectively screen out potential defective products of key components such as heating elements. Especially in mass production, it is impossible to conduct more accurate tests on each batch of incoming materials, resulting in some defective components not being screened out in time, affecting the quality of the overall product. In addition, the existing testing process lacks systematicity and perfection, and usually does not have standardized operating procedures or detailed inspection standards, resulting in a large degree of arbitrariness in the testing process. This non-standard testing method not only fails to ensure the yield rate of incoming materials, but may also miss some defective components, causing defective products to flow into downstream production links, further affecting the final quality of the product. Summary of the invention

[0003] The embodiments of the present invention provide a heating element material testing device, method and storage medium to solve the above technical problems.

[0004] A first aspect of an embodiment of the present invention provides a method for testing a heating element material, the method comprising:

[0005] Get test mode and test parameters;

[0006] When receiving the test instruction, performing an initial resistance value test on the heating element material;

[0007] When the heating element material passes the initial resistance detection, a power calibration test and / or a power-on test is performed on the heating element material according to the test mode and the test parameters, and the test results are displayed.

[0008] Optionally, the test mode includes at least one of a power calibration and power-on test mode, a power calibration test mode and a power-on test mode;

[0009] The test parameters include power calibration test parameters and power-on test parameters;

[0010] The receiving of the test instruction comprises:

[0011] When it is detected that the ADC code value of the start button changes, it is determined that the test instruction is received.

[0012] Optionally, the initial resistance value detection of the heating element material further includes:

[0013] Determine whether the initial resistance value obtained by detection is within the preset resistance value range;

[0014] When the initial resistance value is not within the preset resistance value range, it is determined that the heating element material has failed the initial value test, and the test is stopped and a result that the initial value test has failed is displayed;

[0015] When the initial resistance value is within a preset resistance value range, it is determined that the heating element material passes the initial value test.

[0016] Optionally, when the test mode is a power calibration test mode, performing a power calibration test and / or a power-on test on the heating element material according to the test mode and the test parameters includes:

[0017] Performing a power calibration test on the heating element material according to the power calibration parameter value;

[0018] When the test mode is a power-on test mode, performing a power calibration test and / or a power-on test on the heating element material according to the test mode and the test parameters includes:

[0019] Performing a power-on test on the heating element material according to the power-on test parameter value.

[0020] Optionally, when the test mode is a power calibration and power-on test mode, performing a power calibration test and / or a power-on test on the heating element material according to the test mode and the test parameters includes:

[0021] Performing a power calibration test on the heating element material according to the power calibration parameter value;

[0022] When the power calibration test is passed, the heating element material is subjected to a power-on test according to the power-on test parameter value;

[0023] Alternatively, a power-on test is performed on the heating element material according to the power-on test parameter value;

[0024] After the power-on test is passed, a power calibration test is performed on the heating element material according to the power calibration parameter value.

[0025] Optionally, the power calibration parameter includes at least two preset time periods and a heating power corresponding to each of the preset time periods;

[0026] The performing a power calibration test on the heating element material according to the power calibration parameter comprises:

[0027] Sequentially heating the heating element material in preset time periods according to the heating power corresponding to each preset time period;

[0028] After the heating is completed, the initial resistance value, current resistance value, initial temperature and target temperature of the heating element material are obtained, and the temperature coefficient of the heating element material is calculated according to a preset formula;

[0029] It is determined whether the heating element material passes the power calibration test according to the temperature coefficient.

[0030] Optionally, the temperature coefficient of the heating element material is calculated according to a preset formula, including:

[0031] The temperature coefficient of the heating element material is calculated according to the following formula:

[0032]

[0033] Among them, R0 is the initial resistance value of the heating element material, R1 is the current resistance value of the heating element material, T0 is the initial temperature of the heating element material, and T1 is the target temperature of the heating element material.

[0034] Optionally, the power-on test parameters include a first time period, a second time period, a third time period, and a number of heating times;

[0035] The step of conducting a power-on test on the heating element material according to the power-on test parameters includes:

[0036] The heating element material is heated at a first power for the first time period, and then heated at a second power for the second time period, and the heating process of the first time period and the second time period is cyclically performed according to the heating times, and then cooled for the third time period;

[0037] The current resistance value of the heating element material is detected, a resistance change is obtained according to the current resistance value and an initial resistance value of the heating element material, and whether a power-on test is passed is determined according to the resistance change.

[0038] A second aspect of an embodiment of the present invention provides a heating element material testing device, which is connected to a host computer, and the heating element material testing device includes at least one test board, the test boards are connected by transmission lines, the host computer is connected to a test board, and the test board includes a test module, a start button, a test bench, and a test status display light;

[0039] After the heating element material is installed on the test bench of the test board, the test module receives the test mode and test parameters sent by the host computer, and receives the test instruction after the start button is pressed, and performs an initial resistance test on the heating element material; when the heating element material passes the initial resistance test, the heating element material is subjected to a power calibration test and / or a power-on test according to the test mode and the test parameters, and the test results are displayed through the test status display light and the host computer respectively.

[0040] A third aspect of an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described in the first aspect is implemented.

[0041] The technical effects of the embodiments of the present invention are as follows: by flexibly setting the test mode and test parameters, accurate detection and performance evaluation of the heating element material are achieved, and through the initial resistance detection, reliable benchmark data can be provided for subsequent tests; the power calibration test ensures the consistency of the heating element under different power conditions, and the power-on test simulates the performance under actual working conditions. Real-time data collection and result display improve the accuracy and operability of the test, and can quickly determine whether the heating element material meets the design requirements, providing an efficient and reliable solution for product quality control. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0043] Figure 1 This is a flow chart of a method for testing a heating element material provided in Embodiment 1 of the present invention;

[0044] Figure 2 is a specific flow chart of step S20 in a method for testing heating element materials provided in the first embodiment of the present invention;

[0045] Figure 3 is a specific flow chart of step S30 in a method for testing heating element materials provided in the first embodiment of the present invention;

[0046] Figure 4 is another specific flow chart of step S30 in a method for testing heating element materials provided in the first embodiment of the present invention;

[0047] Figure 5 It is a structural schematic diagram of a heating element material testing device provided in the second embodiment of the present invention;

[0048] Figure 6 This is a flow chart of a heating element material testing device provided in Embodiment 2 of the present invention;

[0049] Figure 7 It is a schematic diagram of the structure of an electronic device in one embodiment of the present invention. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be understood that the present invention can be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and fully convey the scope of the present invention to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0052] It should be understood that when an element or layer is referred to as being "on, adjacent to, connected to or coupled to other elements or layers, it may be directly on, adjacent to, connected to or coupled to other elements or layers, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on, directly adjacent to, directly connected to or directly coupled to other elements or layers, there may be no intervening elements or layers. It should be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be represented as a second element, component, region, layer or part.

[0053] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0054] In order to fully understand the present invention, detailed structures and steps will be presented in the following description to illustrate the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0055] Embodiment 1

[0056] This embodiment 1 provides a method for testing heating element materials. Figure 1 As shown, the test methods for heating element materials include:

[0057] Step S10: Obtain test mode and test parameters.

[0058] Among them, in step S10, it is first necessary to receive and configure the test mode and related test parameters. Test mode refers to different ways of selecting a test method. For example, you can select only a power calibration test, you can select only a power-on test, or you can perform different test strategies such as a power calibration test and a power-on test in sequence. The test parameters include various numerical parameters related to the test process, such as power value, time interval, number of tests, resistance range, etc. These parameters are configured according to different types of heating element materials and actual application requirements to ensure the accuracy and operability of the test.

[0059] As an implementation manner, the test mode includes at least one of a power calibration and power-on test mode, a power calibration test mode, and a power-on test mode; and the test parameters include a power calibration test parameter and a power-on test parameter.

[0060] Among them, the test mode refers to the working mode selected by the heating element material during the test process. The power calibration and power-on test mode is a composite mode. During the test process, one of the two will be performed in turn, and then the other. That is, when testing the heating element, the power calibration test is performed first, followed by the power-on test, or the power-on test is performed first, followed by the power calibration test. The power calibration test mode is limited to the power calibration process. The heating element material will only be heated at a specific power. The temperature coefficient and other parameters are calculated through multi-stage power control, focusing on testing the heating performance and temperature change of the heating element. The power-on test mode is limited to the power-on test. The heating element material is heated after power is turned on and the stability and performance of the heating element are evaluated through heating, power-off and other cyclic modes. The long-term performance and resistance change of the heating element under current are tested. According to actual needs, at least one of the above three modes can be selected, and the specific mode selected depends on the test objectives and requirements. The test parameters refer to the specific values ​​or conditions that need to be configured when performing the above different mode tests. The power calibration test parameters include parameters related to power calibration, such as power size, heating time period, temperature target, power change time period, etc. These parameters are used to implement the power calibration process to ensure that the heating element material achieves the expected temperature change during the heating process and calculate the temperature coefficient. The power-on test parameters include parameters related to the power-on test, such as heating cycle, power-off time, number of cycles, cooling time, etc. These parameters are used to implement the power-on test to ensure that the heating element can achieve the expected stable performance under working conditions and meet the long-term operation requirements.

[0061] The technical effect of this implementation is that by flexibly selecting the test mode and configuring the test parameters, different test requirements can be met to ensure that the quality and performance of the heating element material can be fully evaluated.

[0062] Step S20: When a test instruction is received, an initial resistance value test is performed on the heating element material.

[0063] In step S20, when an instruction to start the test is received (for example, pressing a start button or receiving an external command signal), the test process begins. The initial resistance detection is the first step in the test of the heating element material. The purpose is to measure the resistance value of the heating element at room temperature or in the initial state for comparison and calculation in subsequent testing processes. The initial resistance detection of the heating element material can be based on Ohm's law. The resistance is calculated by applying a known voltage and measuring the current flowing through the heating element material. This method can obtain the initial resistance.

[0064] Step S30. When the heating element material passes the initial resistance detection, a power calibration test and / or a power-on test is performed on the heating element material according to the test mode and test parameters, and the test results are displayed.

[0065] In step S30, the heating element material is tested through initial resistance value, and the actual test task is performed according to the previously set test mode and parameters. When the test mode is a power calibration test, the heating element material will be heated using the specified power and time according to the set test parameters. When the test mode is a power-on test, the heating element material will be powered on and heated according to the set time. The test result display refers to the real-time display of the test status and results during the test process. For example, after the test is completed, the results will be presented to the user through a display screen or a status display light. The user can understand the test results through the display screen or the status display light, and decide whether to continue using or modify it.

[0066] The technical effect of the technical solution provided in the first embodiment is: by flexibly setting the test mode and test parameters, accurate detection and performance evaluation of the heating element material can be achieved, and through the initial resistance detection, reliable benchmark data can be provided for subsequent tests; the power calibration test ensures the consistency of the heating element under different power conditions, and the power-on test simulates the performance under actual working conditions. Real-time data collection and result display improve the accuracy and operability of the test, and can quickly determine whether the material meets the design requirements, providing an efficient and reliable solution for product quality control.

[0067] As an implementation manner, the receiving of the test instruction in step 20 includes:

[0068] When it is detected that the ADC code value of the start button changes, it is determined that the test instruction is received.

[0069] Among them, ADC is an analog-to-digital conversion component that converts analog signals (such as voltage) into digital signals. The range of ADC code values ​​is usually 0 to 4096 (assuming a 12-bit ADC). Within this range, the ADC code value represents the magnitude of the input voltage. When the start button is pressed, the test board connected to the button will detect the change in the ADC code value. Under normal conditions, the ADC code value is 4096, indicating that no button is pressed. When a button is pressed, the ADC code value decreases because the button is connected to a resistor network, and the resistance value of the button affects the ADC input voltage, resulting in a change in the code value. The resistance value corresponding to each button is different, so when different buttons are pressed, the magnitude of the ADC code value change is also different. The resistance of the button is proportional to the ADC code value. Specifically, when a button is pressed, the resistance of the button (R1) is related to the change in the ADC code value. This relationship can be described by the following formula:

[0070] ADC / 4096=R1 / (R1+R0);

[0071] ADC is the current ADC code value, R1 is the resistance value corresponding to the button, and R0 is the reference resistance.

[0072] When the button is pressed, the ADC code value decreases, and the change in resistance R1 causes a change in voltage, causing the ADC to output a smaller digital code value. The relationship between this code value and the resistance value of the button is expressed by the formula. When the test board detects a change in the ADC code value (i.e., pressing the button), it will determine that a test instruction has been received, indicating that the signal to start the test has been issued. Once the ADC code value change of the button is detected, the test board will send a start test command (START) outward through the RS485 bus, which means that other test boards will also receive this signal, add test tasks and start testing. When the test board receives the start test command, it will execute the corresponding test task. In addition to pressing the main start button, the user can also press a separate start button to trigger the start of the test task by detecting the change in the button level. In addition, the test task can be started by clicking the start test button in the lower left corner of the serial port screen, which provides users with a variety of startup methods.

[0073] The technical effect of this embodiment is that by using the change of ADC code value to accurately detect the key input, a simple and efficient test start control is achieved. The input voltage is changed by the resistor network connected to the key, thereby causing the change of the ADC code value, ensuring that the test board can accurately identify the key operation and trigger the test task. This test start mechanism based on ADC changes simplifies the test process and improves the level of automation. With the help of RS485 bus transmission of the start test command, all test boards can execute the test task synchronously, ensuring that multiple boards work together, thereby improving the reliability of the system and the test efficiency.

[0074] As an implementation method, Figure 2 As shown, in step S20, the heating element material is initially tested for resistance, and then the following steps are further included:

[0075] Step S201: Determine whether the initial resistance value detected is within a preset resistance range.

[0076] Among them, when testing the initial state of the heating element material, measuring its initial resistance is the first step in judging the quality and performance of the material. By comparing with the preset resistance range, evaluate whether the material meets the test requirements. The specific process can be: first obtain the initial resistance of the heating element material through a detection method (such as direct measurement or by voltage-current method), and compare the initial resistance with the preset resistance range. If the initial resistance is within the preset range, it indicates that the electrical properties of the material meet the design requirements and subsequent testing can be carried out; otherwise, it indicates that the material may be defective or not meet the standards.

[0077] Step S202: When the initial resistance value is not within the preset resistance value range, it is determined that the heating element material has failed the initial value test, and the test is stopped and a result that the initial value test has failed is displayed.

[0078] Among them, if the initial resistance value of the heating element material does not meet the preset range, it means that the material cannot meet the performance requirements under normal working conditions and no subsequent testing is required. Therefore, the test is terminated at this time, and the user is reminded that the heating element material is unqualified. The working process is: if the initial resistance value is detected to be outside the preset range, it is determined that the heating element material has not passed the initial value test. The test process is terminated immediately, and subsequent operations are stopped to avoid waste of resources. The display light is used to prompt, or a result message such as "initial value test failed" or "resistance value is abnormal" is displayed on the host computer to inform the operator that there is a problem with the heating element material.

[0079] Step S203: When the initial resistance value is within the preset resistance value range, it is determined that the heating element material passes the initial value test.

[0080] Among them, if the initial resistance value is within the preset range, it means that the initial state of the heating element material meets the requirements, and its performance and quality meet the test specifications, and it can enter the next test stage. The working process is: when the initial resistance value is detected to be within the preset range, it is determined that the heating element material has passed the initial value test, and it is considered that the material quality meets the subsequent test requirements. The test process continues, and the next test task is started according to the preset test mode (such as power calibration test, power-on test, etc.).

[0081] The technical effect of this embodiment is: strict quality screening of heating element materials is carried out through initial resistance detection, effectively ensuring that the electrical properties of the test materials meet the design requirements. By comparing with the preset resistance range, it is possible to quickly identify whether the material has defects, avoiding invalid or unqualified materials from entering the subsequent testing stage. If the initial resistance value is unqualified, the system can terminate the test in time and inform the operator through intuitive prompts to reduce resource waste. If the initial resistance value meets the requirements, the system allows entry into the subsequent testing stage, thereby improving the accuracy and effectiveness of the test.

[0082] As an implementation mode, when the test mode is a power calibration test mode, a power calibration test and / or a power-on test is performed on the heating element material according to the test mode and the test parameters, including:

[0083] Perform power calibration test on heating element materials according to power calibration parameter values.

[0084] Among them, in the power calibration test mode, a series of heating tests are performed on the heating element material by precisely controlling the power and time. The power calibration parameter values ​​include multiple preset heating powers and time periods. These parameters are used to define the power size and action time during the test. For example, power values ​​(such as P1, P2, etc.) in different time periods (such as 0 seconds to 20 seconds, 20 seconds to 60 seconds). The specific test conditions in each time period, such as power size and action time, are used to accurately control the heating of the heating element material according to these parameters to simulate various scenarios in actual work. The power calibration test refers to heating the heating element material according to the set power and time to measure its resistance and temperature changes under different power conditions. The purpose of the calibration process is to ensure that the heating element material can reach a consistent temperature under the same power conditions, indicating that the material performance meets the standards.

[0085] When the test mode is the power-on test mode, a power calibration test and / or a power-on test is performed on the heating element material according to the test mode and test parameters, including:

[0086] Conduct an electrical test on the heating element material according to the electrical test parameter values.

[0087] Among them, in the power-on test mode, the heating element material is subjected to power-on heating and cooling cycle tests to simulate its actual working state. Test parameters are specific values ​​or conditions used to control the test process, including heating time, power-off time, cooling time, number of heating cycles, etc. The heating element material is powered on and heated according to the heating time set by the power-on test parameter value. After the power-on is completed, the power is turned off, and the cooling process is waited for the power-off time. This heating and cooling process will be repeated multiple times according to the set number of heating times. After all cycles are completed, the cooling time will be waited for the heating element to cool completely. Test the performance of the material in the power-on and power-off cycles, such as resistance changes, heat resistance and stability. By detecting the changes in the material in multiple cycles, it is determined whether it meets the use requirements.

[0088] Furthermore, the power calibration and power-on test mode is a combination of the above two modes. When the test mode is the power calibration and power-on test mode, the heating element material is subjected to a power calibration test and / or a power-on test according to the test mode and the test parameters, including:

[0089] Perform power calibration test on heating element materials according to power calibration parameter values;

[0090] When the power calibration test is passed, the heating element material is then subjected to a power-on test according to the power-on test parameter values;

[0091] Alternatively, a power-on test is performed on the heating element material according to the power-on test parameter value;

[0092] When the power-on test is passed, a power calibration test is performed on the heating element material according to the power calibration parameter value.

[0093] As an implementation mode, the power calibration parameter includes at least two preset time periods and a heating power corresponding to each preset time period;

[0094] like Figure 3 As shown, the step S30 performs a power calibration test on the heating element material according to the power calibration parameter, including:

[0095] Step S301: heating the heating element material in preset time periods in sequence according to the heating power corresponding to each preset time period.

[0096] Among them, during the power calibration test, at least two time periods will be used, and each time period has a corresponding heating power setting. The purpose of this setting is to accurately control and adjust the heating process so that the temperature and resistance changes of the heating element material can be better calibrated. During the power calibration process, the test will be divided into multiple time periods, and the heating power in each time period can be different. There are at least two time periods, which means that there are at least two different time periods (for example, 0s-t1 seconds, t1 seconds-t2 seconds) to control the heating process respectively, which can be expanded to more time periods as needed. In each time period, the heating element will be heated at a predetermined power. These powers are usually different to ensure that the temperature changes in the heating process are carried out in stages. Using different powers in different time periods helps to more accurately control the rate of temperature rise and make the final test results more accurate. Assume that there are two time periods: the first time period is 0 seconds to 20 seconds, and the heating power P1 is used for heating; the second time period is 20 seconds to 40 seconds, and the heating power P2 is used for heating. Through this segmented heating method, the heating effect of the heating element at different powers can be better simulated to ensure that the calibration process is more accurate.

[0097] Step S302: After heating is completed, the initial resistance value, current resistance value, initial temperature and target temperature of the heating element material are obtained, and the temperature coefficient of the heating element material is calculated according to a preset formula.

[0098] Among them, this step is to measure the temperature change and resistance change of the heating element in order to further calculate its temperature coefficient (TCR, temperature coefficient), initial resistance (R0, record the resistance of the heating element before heating), current resistance (R1, after heating is completed, record the current resistance of the heating element), initial temperature (T0, record the temperature of the heating element before heating), target temperature (T1, after heating is completed, record the target temperature of the heating element).

[0099] The temperature coefficient of the heating element material is calculated according to a preset formula, including:

[0100] Calculate the temperature coefficient of the heating element material according to the following formula:

[0101]

[0102] Among them, R0 is the initial resistance value of the heating element material, R1 is the current resistance value of the heating element material, T0 is the initial temperature of the heating element material, and T1 is the target temperature of the heating element material.

[0103] Step S303: Determine whether the heating element material has passed the power calibration test based on the temperature coefficient.

[0104] If the calculated temperature coefficient (TCR) is within the preset range, the heating element material is considered to have passed the power calibration test. The temperature coefficient value indicates that the material exhibits a consistent temperature-resistance relationship during the actual heating process and meets the expected performance requirements. If the TCR exceeds the preset range, the heating element material has failed the test and requires further adjustment or replacement.

[0105] The technical effect of this embodiment is that by controlling the heating power and monitoring the temperature and resistance changes of the heating element, the temperature coefficient of the heating element can be accurately calculated. By judging whether the TCR meets the preset standards, it is possible to evaluate whether the heating element meets the quality requirements and ensure its consistency and reliability in practical applications.

[0106] As an implementation mode, the power-on test parameters include a first time period, a second time period, a third time period, and a heating number;

[0107] like Figure 4 As shown, the heating element material is subjected to an electrical test according to the electrical test parameters, including:

[0108] Step S304: The heating element material is heated at a first power for a first time period, and then heated at a second power for a second time period, and the process of heating the first time period and the second time period is cyclically performed according to the number of heating times, and then cooled for a third time period.

[0109] Among them, the first time period and the second time period refer to the two different time periods when the heating element material is powered on and heated in each cycle, which will affect the temperature rise and energy input of the heating element. By accurately controlling the first time period and the second time period and using different powers in each time period, the heating of the heating element in actual work can be simulated. The third time period refers to the overall cooling time of the heating element material after all cycles are completed. The purpose is to ensure that the heating element material returns to a state close to normal temperature or completely stable after the entire test is completed. This provides standard initial conditions for subsequent measurements and avoids the influence of accumulated heat in the test on resistance detection. The number of heating times refers to the number of cycles of heating and power-off cooling during the power-on test. The number of heating times reflects the intensity of the test process and the durability of the heating element material. Through multiple heating and cooling cycles, the long-term operation of the heating element in actual use can be simulated to understand whether its performance is stable or decaying.

[0110] Step S305: Detect the current resistance value of the heating element material, obtain the resistance change according to the current resistance value and the initial resistance value of the heating element material, and determine whether the power-on test is passed according to the resistance change.

[0111] Among them, after all heating and cooling cycles are completed, the current resistance of the heating element will be measured. Since the resistance of the heating element usually changes with the change of temperature, the temperature of the heating element rises during the heating process, and the resistance will also change accordingly. The initial resistance is the resistance measured before the test starts, which represents the state of the heating element when it is not heated. The current resistance after heating is compared with the initial resistance, and the change in resistance (that is, the difference between the current resistance and the initial resistance) is calculated. By analyzing the change in resistance, it is determined whether the heating element meets the designed power-on test standard. If the change in resistance is within the predetermined allowable range, it means that the performance of the heating element is normal and the test passes; if the change in resistance is too large or too small, it may indicate that there is a problem with the heating element material, such as the heating element may be damaged, aged or have other quality problems, and thus fail the test.

[0112] The technical effect of this implementation is: by setting the heating time, cooling time and number of cycles, the working state of the heating element in actual use is simulated to comprehensively evaluate its performance and durability. Through the precise control of the first time period, the second time period and the third time period, the temperature rise and cooling state of the heating element in the cycle test are fully considered to avoid the impact of heat accumulation on subsequent tests. The calculation of the resistance change further verifies the electrical performance stability of the heating element and quickly determines whether it meets the design standards. The overall testing process can not only efficiently screen out unqualified materials, but also ensure the reliability of the test results.

[0113] Embodiment 2

[0114] Embodiment 2 of the present invention provides a heating element material testing device connected to a host computer, such as Figure 5 As shown, the heating element material testing device includes at least one test board, the test boards are connected by transmission lines, the host computer is connected to a test board, and the test board includes a test module, a start button, a test bench and a test status display light;

[0115] After the heating element material is installed on the test bench of the test board, the test module receives the test mode and test parameters sent by the host computer, and receives the test instruction after the start button is pressed, and performs an initial resistance test on the heating element material; when the heating element material passes the initial resistance test, the heating element material is subjected to a power calibration test and / or a power-on test according to the test mode and test parameters, and the test results are displayed through the test status display light and the host computer respectively.

[0116] Among them, Figure 6As shown, the working process of the heating element material testing device is: set the test mode command SETSELX, X = 0 (power calibration first and then power-on test), X = 1 (power-on test first and then power calibration), X = 2 (power calibration only), X = 3 (power-on test only), set the time function, power calibration cooling time, power-on test times, heating time, pause time, power-on test cooling time. Start the process, press the one-key start button, the test board connected to the one-key start button detects that the ADC code value of the button has changed (the ADC code value is 4096 under normal circumstances. When the one-key start button is pressed, the ADC code value decreases. The resistance value corresponding to each button is different. When pressed, the ADC code value decreases differently, and the resistance value is proportional to the ADC code value). Send out a start test command (START) through RS485 and add a test task to start the test (the other test boards add test tasks and start the test after receiving the start test command). Press a separate start button, detect the change in the button level, add a test task, and start the test. After starting the test, measure the initial resistance R0 of the heating element (different types of heating elements have different initial resistance numbers, for example, the heating needle is single-segment and the double-segment heating tube is double-segment) and the initial temperature T0 to determine whether the initial resistance is within the preset resistance range. If it is not within the preset resistance range, it is determined that the test has not passed, and the test is terminated. The serial port screen displays the test results, the test status light is red, and the light corresponding to the failed item in the LED light row is on; if it is within the preset resistance range, it is determined that the test has passed, and then the test is started according to the test mode. Test mode 1 is to perform a power calibration test first and then a power-on test. If the power calibration fails, the test status light corresponding to the power calibration in the LED light row will light up in red. If the power-on test fails, the test status light corresponding to the power-on test in the LED light row will light up in red. If both the power calibration test and the power-on test pass, the test status light corresponding to the power calibration in the LED light row will light up in green, and the test status light corresponding to the power-on test will light up in green. Test mode 2 is a power calibration test only. If the power calibration fails, the test status light corresponding to the power calibration in the LED light row lights up red. If the power calibration test passes, the test status light corresponding to the power calibration in the LED light row lights up green. Test mode 3 is a power-on test first and then a power calibration test. If the power-on test fails, the test status light corresponding to the power-on test in the LED light row lights up red. If the power calibration fails, the test status light corresponding to the power calibration in the LED light row lights up red. If both the power-on test and the power calibration test pass, the test status light corresponding to the power-on test in the LED light row lights up green, and the test status light corresponding to the power calibration lights up green. Test mode 4 is a power-on test only. If the power-on test fails, the test status light corresponding to the power-on test in the LED light row lights up red. If the power-on test passes, the test status light corresponding to the power-on test in the LED light row lights up green.Among them, the power calibration is carried out by heating at different powers in three time periods (0s-20s-90s-150s). After the heating is completed, the TCR of the heating element is calculated by the formula, followed by a cooling time of t1 second, and the power calibration is completed. The power-on test is heated for t2 seconds, and the power is turned off and waited for t3 seconds for N cycles. After the cycle is completed, the current resistance value R1 of the heating element is measured after cooling for t4 seconds to determine whether the current resistance value and the resistance change (the difference between the initial resistance value and the current resistance value) are within the range. The stop process is: press the one-button stop button, and the test board connected to the one-button stop button detects the change in the button level (when the button is pressed, the level changes from high to low), sends a stop test command (STOP) to the outside through RS485, deletes the test task, and stops the test (the other test boards delete the test task and stop the test after receiving the stop test command). Press a separate stop button, detect the change in the button level, delete the test task, and stop the test. You can also stop the test separately by clicking the stop test (STOP) button in the lower left corner of the serial port screen.

[0117] The present application also provides an electronic device, such as Figure 7 As shown, the electronic device 2 includes: at least one processor 20, a memory 21, and a computer program 22 stored in the memory 21 and executable on at least one processor 20. When the processor 20 executes the computer program, the steps in any of the above-mentioned method embodiments are implemented, or when the processor 20 executes the computer program, the functions of each module / unit in the above-mentioned device embodiments are implemented.

[0118] Exemplarily, the computer program may be divided into one or more modules / units, one or more modules / units are stored in a memory and executed by a processor to complete the present application. One or more modules / units may be a series of computer program instruction segments capable of completing a specific function, and the instruction segments are used to describe the execution process of the computer program in an electronic device.

[0119] Those skilled in the art will understand that Figure 7 These are merely examples of electronic devices and do not constitute a limitation of the electronic device. The electronic device may include more or fewer components than those shown in the figure, or a combination of certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0120] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0121] The memory may be an internal storage unit of an electronic device, such as a hard disk or memory of the electronic device. The memory may also be an external storage device of the electronic device, such as a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device. Furthermore, the memory may also include both an internal storage unit of the electronic device and an external storage device.

[0122] An embodiment of the present application further provides a readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0123] An embodiment of the present application provides a computer program product. When the computer program product is run on an electronic device, a mobile terminal can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0124] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device that can carry the computer program code to the camera / terminal device, a recording medium, a computer memory, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), an electric carrier signal, a telecommunication signal, and a software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0125] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0126] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0127] In the embodiments provided in the present application, it should be understood that the disclosed devices / equipment and methods can be implemented in other ways. For example, the device / equipment embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0128] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0129] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A method for testing heating element materials, characterized in that: include: Get test mode and test parameters; When receiving the test instruction, performing an initial resistance value test on the heating element material; When the heating element material passes the initial resistance detection, a power calibration test and / or a power-on test is performed on the heating element material according to the test mode and the test parameters, and the test results are displayed.

2. The method for testing heating element materials according to claim 1, characterized in that: The test mode includes at least one of a power calibration and power-on test mode, a power calibration test mode, and a power-on test mode; The test parameters include power calibration test parameters and power-on test parameters; The receiving of the test instruction comprises: When it is detected that the ADC code value of the start button changes, it is determined that the test instruction is received.

3. The method for testing heating element materials according to claim 1, characterized in that: The initial resistance value detection of the heating element material further includes: Determine whether the initial resistance value obtained by detection is within the preset resistance value range; When the initial resistance value is not within the preset resistance value range, it is determined that the heating element material has failed the initial value test, and the test is stopped and a result that the initial value test has failed is displayed; When the initial resistance value is within a preset resistance value range, it is determined that the heating element material passes the initial value test.

4. The method for testing heating element materials according to claim 2, characterized in that: When the test mode is a power calibration test mode, performing a power calibration test and / or a power-on test on the heating element material according to the test mode and the test parameters includes: Performing a power calibration test on the heating element material according to the power calibration parameter value; When the test mode is a power-on test mode, performing a power calibration test and / or a power-on test on the heating element material according to the test mode and the test parameters includes: Performing a power-on test on the heating element material according to the power-on test parameter value.

5. The method for testing heating element materials according to claim 2, characterized in that: When the test mode is a power calibration and power-on test mode, performing a power calibration test and / or a power-on test on the heating element material according to the test mode and the test parameters includes: Performing a power calibration test on the heating element material according to the power calibration parameter value; When the power calibration test is passed, the heating element material is subjected to a power-on test according to the power-on test parameter value; Alternatively, a power-on test is performed on the heating element material according to the power-on test parameter value; After the power-on test is passed, a power calibration test is performed on the heating element material according to the power calibration parameter value.

6. The method for testing heating element materials according to claim 4 or 5, characterized in that: The power calibration parameters include at least two preset time periods and the heating power corresponding to each of the preset time periods; The performing a power calibration test on the heating element material according to the power calibration parameter comprises: Sequentially heating the heating element material in preset time periods according to the heating power corresponding to each preset time period; After the heating is completed, the initial resistance value, current resistance value, initial temperature and target temperature of the heating element material are obtained, and the temperature coefficient of the heating element material is calculated according to a preset formula; It is determined whether the heating element material passes the power calibration test according to the temperature coefficient.

7. The method for testing heating element materials according to claim 6, characterized in that: The temperature coefficient of the heating element material is calculated according to a preset formula, including: The temperature coefficient of the heating element material is calculated according to the following formula: Wherein, R0 is the initial resistance value of the heating element material, R1 is the current resistance value of the heating element material, T0 is the initial temperature of the heating element material, and T1 is the target temperature of the heating element material.

8. The method for testing heating element materials according to claim 4 or 5, characterized in that: The power-on test parameters include a first time period, a second time period, a third time period, and a heating number; The step of conducting a power-on test on the heating element material according to the power-on test parameters includes: The heating element material is heated at a first power for the first time period, and then heated at a second power for the second time period, and the heating process of the first time period and the second time period is cyclically performed according to the heating times, and then cooled for the third time period; The current resistance value of the heating element material is detected, a resistance change is obtained according to the current resistance value and an initial resistance value of the heating element material, and whether a power-on test is passed is determined according to the resistance change.

9. A heating element material testing device, connected to a host computer, characterized in that: The heating element material testing device comprises at least one test board, the test boards are connected by transmission lines, the host computer is connected to a test board, and the test board comprises a test module, a start button, a test table and a test status display light; When the heating element material is installed on the test bench of the test board, the test module receives the test mode and test parameters sent by the host computer, and receives the test instruction after the start button is pressed, and performs initial resistance value detection on the heating element material; When the heating element material passes the initial resistance detection, a power calibration test and / or a power-on test is performed on the heating element material according to the test mode and the test parameters, and the test results are displayed by the test status display light and the host computer respectively.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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