Lamp life prediction method, device, equipment and storage medium

Abstract

The application provides a lamp life prediction method, device, equipment and storage medium, the method comprises the following steps: S1, acquiring the thermal resistance value, the working time length, the working environment temperature and the working current of the lamp; S2, determining the working junction temperature of the lamp according to the thermal resistance value, the working environment temperature and the working current; S3, determining the standard working time length of the lamp at the standard junction temperature according to the working time length and the working junction temperature; S4, determining the remaining use time length of the lamp according to the standard working time length and the rated working time length of the lamp at the standard junction temperature. The application first determines the working junction temperature of the lamp, then determines the standard working time length of the lamp at the standard junction temperature based on the working junction temperature, and further determines the remaining use time length of the lamp, so that the determination result of the remaining use time length is more accurate, thereby improving the accuracy and reliability of the lamp life prediction result.

Description

Technical Field

[0001] This application relates to the field of lighting fixture technology, and in particular to a method, apparatus, device and storage medium for predicting the lifespan of lighting fixtures. Background Technology

[0002] In recent years, semiconductor lighting has been used more and more widely in industrial fields and daily life. Light emitting diode (LED) is a semiconductor light-emitting device that emits light electronically. It is a new type of solid-state cold light source with advantages such as low voltage driving, high energy efficiency, long life and low cost.

[0003] With the development of LED technology, an unavoidable limiting factor in LED research and development is the gap between its actual lifespan and the theoretical value. Therefore, conducting corresponding lifespan tests and estimating the lifespan of LEDs based on various indicators to improve their reliability and extend their service life has become a necessary measure. How to accurately predict the lifespan of LED lamps has also become an important issue.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this application, and therefore may contain information that is not part of the prior art known to those skilled in the art. Summary of the Invention

[0005] This application provides a method, apparatus, device, and storage medium for predicting the lifespan of lighting fixtures, in order to solve the problems existing in the prior art.

[0006] In a first aspect, this application provides a method for predicting the lifespan of a lighting fixture, including:

[0007] S1. Obtain the thermal resistance, operating time, ambient temperature, and operating current of the luminaire;

[0008] S2. Determine the operating junction temperature of the lamp based on the thermal resistance value, the ambient temperature, and the operating current;

[0009] S3. Based on the already operated time and the operating junction temperature, determine the standard operating time of the luminaire at the standard junction temperature;

[0010] S4. Determine the remaining usage time of the lamp based on the standard working time and the rated working time of the lamp at the standard junction temperature.

[0011] In some embodiments, S2, the operating junction temperature of the luminaire is calculated using the following formula;

[0012]

[0013] PD = VF × IF

[0014] Wherein, TJ represents the operating junction temperature of the luminaire, TA represents the operating ambient temperature, PD represents the power consumption of the luminaire, RJA represents the thermal resistance of the luminaire, VF represents the forward voltage drop of the luminaire, and IF represents the operating current of the luminaire.

[0015] In some embodiments, S3 includes:

[0016] S31. Determine the current illuminance of the lamp based on the operating time and the operating junction temperature;

[0017] S32. Based on the light decay curve of the luminaire, determine the standard working time of the luminaire at the standard junction temperature that matches the current illuminance.

[0018] In some embodiments, S4 includes:

[0019] S41. Calculate the time difference between the rated operating time of the luminaire at the standard junction temperature and the standard operating time;

[0020] S42. Determine the time difference as the remaining usage time of the lamp.

[0021] In some embodiments, it also includes:

[0022] S5. When the remaining usage time of the lamp is less than the preset time, output a lamp replacement prompt message.

[0023] Secondly, this application provides a lamp life prediction device, comprising:

[0024] The acquisition module is used to acquire the thermal resistance value of the lamp, the duration of operation, the ambient temperature, and the operating current.

[0025] The first determining module is used to determine the operating junction temperature of the lamp based on the thermal resistance value, the operating ambient temperature, and the operating current.

[0026] The second determining module is used to determine the standard operating time of the lamp at the standard junction temperature based on the operating time and the operating junction temperature.

[0027] The third determining module is used to determine the remaining usage time of the lamp based on the standard working time and the rated working time of the lamp at the standard junction temperature.

[0028] In some embodiments, the first determining module calculates the operating junction temperature of the luminaire using the following formula;

[0029]

[0030] PD = VF × IF

[0031] Wherein, TJ represents the operating junction temperature of the luminaire, TA represents the operating ambient temperature, PD represents the power consumption of the luminaire, RJA represents the thermal resistance of the luminaire, VF represents the forward voltage drop of the luminaire, and IF represents the operating current of the luminaire.

[0032] In some embodiments, the second determining module is specifically used to: determine the current illuminance of the luminaire based on the operating time and the operating junction temperature; and determine the standard operating time as the operating time of the luminaire that matches the current illuminance at the standard junction temperature, based on the luminous decay curve of the luminaire.

[0033] Thirdly, this application provides a terminal device, including a memory and a processor:

[0034] A memory for storing computer programs; a processor for reading the computer programs from the memory and performing the following operations:

[0035] Obtain the thermal resistance, operating time, ambient temperature, and operating current of the luminaire;

[0036] The operating junction temperature of the lamp is determined based on the thermal resistance value, the ambient operating temperature, and the operating current.

[0037] Based on the operating time and the operating junction temperature, determine the standard operating time of the luminaire at the standard junction temperature;

[0038] The remaining operating time of the luminaire is determined based on the standard operating time and the rated operating time of the luminaire at the standard junction temperature.

[0039] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the above-described lamp life prediction method.

[0040] The method, apparatus, equipment, and storage medium for predicting the lifespan of a luminaire provided in this application include: S1, acquiring the thermal resistance value, operating time, operating ambient temperature, and operating current of the luminaire; S2, determining the operating junction temperature of the luminaire based on the thermal resistance value, the operating ambient temperature, and the operating current; S3, determining the standard operating time of the luminaire at a standard junction temperature based on the operating time and the operating junction temperature; and S4, determining the remaining service life of the luminaire based on the standard operating time and the rated operating time of the luminaire at the standard junction temperature. This application first determines the operating junction temperature of the luminaire, then determines the standard operating time of the luminaire at a standard junction temperature based on the operating junction temperature, and finally determines the remaining service life of the luminaire. This makes the determination of the remaining service life more accurate, thereby improving the accuracy and reliability of the luminaire lifespan prediction results. Attached Figure Description

[0041] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0042] Figure 1 A schematic diagram of the lamp life prediction method provided in the embodiments of this application;

[0043] Figure 2 This is a schematic diagram of the light decay curve of the lamp provided in the embodiment of this application;

[0044] Figure 3 This is a schematic diagram of a lamp life prediction device provided in an embodiment of this application.

[0045] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms "a" and "the" as used in the embodiments of this application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0049] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0050] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0051] The lifespan of LED lights varies depending on the working environment, and existing prediction methods may have inaccurate results. Therefore, how to accurately predict the lifespan of LED lights has become a problem that needs to be solved.

[0052] Considering that the lifespan of LED lamps is related to factors such as the product structure design and working environment, this application combines the characteristics of LED light sources, product design characteristics, and working environment factors to predict the remaining lifespan of LED lamps in order to solve the problem of inaccurate lifespan prediction.

[0053] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0054] Figure 1 This is a schematic diagram of the lamp life prediction method provided in the embodiments of this application, as shown below. Figure 1 As shown, this application provides a method for predicting the lifespan of a lighting fixture, including:

[0055] S1. Obtain the thermal resistance, operating time, ambient temperature, and operating current of the luminaire;

[0056] Among them, the thermal resistance value of the lamp corresponds to the product design characteristics of the lamp; the working time refers to the duration that the lamp has been working; the working environment temperature corresponds to the actual working environment temperature of the lamp; and the working current is the current of the lamp when it is actually working.

[0057] S2. Determine the operating junction temperature of the lamp based on the thermal resistance value, the ambient temperature, and the operating current;

[0058] The operating junction temperature of the lamp refers to the junction temperature of the lamp during actual operation. Junction temperature is the actual operating temperature of semiconductors in electronic devices.

[0059] S3. Based on the already operated time and the operating junction temperature, determine the standard operating time of the luminaire at the standard junction temperature;

[0060] After determining the junction temperature, the operating time of the luminaire is converted to obtain the standard operating time of the luminaire at the standard junction temperature.

[0061] The standard junction temperature can be set according to the actual situation, such as 115℃ or 120℃.

[0062] S4. Determine the remaining usage time of the lamp based on the standard working time and the rated working time of the lamp at the standard junction temperature.

[0063] After determining the standard operating time, the remaining usage time of the luminaire can be determined based on the standard operating time and the rated operating time of the luminaire at the standard junction temperature. The rated operating time is the rated operating time of the luminaire at the standard junction temperature, and the standard operating time is the operating time of the luminaire at the standard junction temperature. Therefore, the two correspond to the same junction temperature condition (i.e., both correspond to the standard junction temperature), which can help improve the accuracy of the remaining usage time calculation result.

[0064] The lamp life prediction method provided in this application first determines the operating junction temperature of the lamp, then determines the standard operating time of the lamp at the standard junction temperature based on the operating junction temperature, and then determines the remaining service life of the lamp. This can make the determination of the remaining service life more accurate, thereby improving the accuracy and reliability of the lamp life prediction results.

[0065] In some embodiments, S2, the operating junction temperature of the luminaire is calculated using the following formula;

[0066]

[0067] PD = VF × IF

[0068] Wherein, TJ represents the operating junction temperature of the luminaire, TA represents the operating ambient temperature, PD represents the power consumption of the luminaire, RJA represents the thermal resistance of the luminaire, VF represents the forward voltage drop of the luminaire, and IF represents the operating current of the luminaire.

[0069] Based on the above formula, and given that other parameters are known, the operating junction temperature of the lamp can be accurately calculated.

[0070] In some embodiments, S3 includes:

[0071] S31. Determine the current illuminance of the lamp based on the operating time and the operating junction temperature;

[0072] S32. Based on the light decay curve of the luminaire, determine the standard working time of the luminaire at the standard junction temperature that matches the current illuminance.

[0073] Specifically, luminous decay refers to the decrease in light intensity of a luminaire after it has been lit for a period of time compared to its initial light intensity, and this decrease cannot be recovered. The reduced portion is called luminous decay.

[0074] For example, Figure 2 This is a schematic diagram of the light decay curve of a lamp provided in an embodiment of this application, where the horizontal axis represents the working time of the lamp, and the vertical axis represents the ratio of the lamp's light intensity to its initial light intensity. Figure 2 As shown, the light decay curves of the luminaires differ under different junction temperatures. For example, when the junction temperature is 135℃, the luminaire begins to show light decay after less than 10,000 hours of operation; when the junction temperature is 120℃, the brightness almost decreases to zero after nearly 100,000 hours of operation; and when the junction temperature is 115℃, the luminaire still has relatively low brightness after nearly 100,000 hours of operation.

[0075] In this embodiment, the current illuminance of the lamp is first determined based on the operating time and the operating junction temperature, for example, by referring to... Figure 2 Assuming the current operating junction temperature is 135℃ and the operating time is t1, corresponding to point A in the diagram, the ratio of the current brightness to the initial brightness of the luminaire can be determined to be between 0.7 and 0.8. Based on the luminous decay curve of the luminaire, the standard operating time is determined to be the operating time at the standard junction temperature that matches the current illuminance. Assuming the standard junction temperature is 120℃, the illuminance at point B is the same as point A in the diagram, and the operating time corresponding to point B is t2. Therefore, the standard operating time is determined to be t2.

[0076] In some embodiments, S4 includes: S41, calculating the time difference between the rated operating time of the luminaire at the standard junction temperature and the standard operating time; S42, determining the time difference as the remaining usage time of the luminaire.

[0077] For example, assuming the rated operating time of the lamp at the standard junction temperature is t0, the standard operating time is t2, and the remaining operating time of the lamp is t3, then t3 = t0 - t2.

[0078] The rated operating time is the rated operating time of the luminaire at the standard junction temperature, and the standard operating time is the operating time of the luminaire at the standard junction temperature. Therefore, by converting the operating time into a uniform junction temperature condition (i.e., all corresponding to the standard junction temperature), the accuracy of the remaining usage time calculation result can be improved.

[0079] In some embodiments, the method further includes: S5, when the remaining usage time of the lamp is less than a preset time, outputting a lamp replacement prompt message.

[0080] Specifically, when the remaining usage time of the lamp is less than the preset time, it indicates that the lamp may be not bright enough. Therefore, a lamp replacement prompt message can be output to remind the user to replace the lamp in time.

[0081] Figure 3 This is a schematic diagram of the lamp life prediction device provided in the embodiments of this application, as shown below. Figure 3 As shown, this application provides a lamp life prediction device, comprising:

[0082] The acquisition module 10 is used to acquire the thermal resistance value, operating time, operating ambient temperature and operating current of the lamp;

[0083] The first determining module 20 is used to determine the operating junction temperature of the lamp based on the thermal resistance value, the operating ambient temperature, and the operating current.

[0084] The second determining module 30 is used to determine the standard operating time of the lamp at the standard junction temperature based on the operating time and the operating junction temperature.

[0085] The third determining module 40 is used to determine the remaining usage time of the lamp based on the standard working time and the rated working time of the lamp at the standard junction temperature.

[0086] In some embodiments, the first determining module calculates the operating junction temperature of the luminaire using the following formula;

[0087]

[0088] PD = VF × IF

[0089] Wherein, TJ represents the operating junction temperature of the luminaire, TA represents the operating ambient temperature, PD represents the power consumption of the luminaire, RJA represents the thermal resistance of the luminaire, VF represents the forward voltage drop of the luminaire, and IF represents the operating current of the luminaire.

[0090] In some embodiments, the second determining module is specifically used to: determine the current illuminance of the luminaire based on the operating time and the operating junction temperature; and determine the standard operating time as the operating time of the luminaire that matches the current illuminance at the standard junction temperature, based on the luminous decay curve of the luminaire.

[0091] The limitations regarding the lamp life prediction device can be found in the limitations described in the above method embodiments, and will not be repeated here.

[0092] In some embodiments, this application provides a terminal device, including a memory and a processor:

[0093] A memory for storing computer programs; a processor for reading the computer programs from the memory and performing the following operations:

[0094] Obtain the thermal resistance, operating time, ambient temperature, and operating current of the luminaire;

[0095] The operating junction temperature of the lamp is determined based on the thermal resistance value, the ambient operating temperature, and the operating current.

[0096] Based on the operating time and the operating junction temperature, determine the standard operating time of the luminaire at the standard junction temperature;

[0097] The remaining operating time of the luminaire is determined based on the standard operating time and the rated operating time of the luminaire at the standard junction temperature.

[0098] In some embodiments, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the above-described lamp life prediction method.

[0099] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0100] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0101] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0102] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method of predicting the lifetime of a luminaire, characterized by, The method comprises the following steps: S1, acquiring the thermal resistance value, working time length, working environment temperature and working current of a lamp; S2, determining the working junction temperature of the lamp according to the thermal resistance value, working environment temperature and working current; S3, determining the standard working time length of the lamp at a standard junction temperature according to the working time length and working junction temperature; S4, determining the remaining use time length of the lamp according to the standard working time length and the rated working time length of the lamp at the standard junction temperature. The S3 comprises the following steps: S31, determining the current illuminance of the lamp according to the working time length and working junction temperature; S32, determining the working time length of the lamp at the standard junction temperature matching the current illuminance as the standard working time length according to the light decay curve of the lamp.

2. The lamp life prediction method according to claim 1, characterized in that, In the S2, the working junction temperature of the lamp is calculated by the following formula: ； ； Wherein, TJ represents the working junction temperature of the lamp, TA represents the working environment temperature, PD represents the power consumption of the lamp, RJA represents the thermal resistance value of the lamp, VF represents the forward voltage drop of the lamp, and IF represents the working current of the lamp.

3. The lamp life prediction method according to claim 1 or 2, characterized in that, The S4 comprises the following steps: S41, calculating the time difference between the rated working time length of the lamp at the standard junction temperature and the standard working time length; S42, determining the time difference as the remaining use time length of the lamp.

4. The method of claim 3, wherein, The method further comprises the following step: S5, when the remaining use time length of the lamp is less than a preset time length, outputting a lamp replacement prompt information.

5. A luminaire lifetime prediction apparatus characterized by comprising: The method comprises the following steps: An acquisition module is configured to acquire the thermal resistance value, working time length, working environment temperature and working current of a lamp; A first determination module is configured to determine the working junction temperature of the lamp according to the thermal resistance value, working environment temperature and working current; A second determination module is configured to determine the standard working time length of the lamp at a standard junction temperature according to the working time length and working junction temperature; A third determination module is configured to determine the remaining use time length of the lamp according to the standard working time length and the rated working time length of the lamp at the standard junction temperature. The second determination module is specifically configured to determine the current illuminance of the lamp according to the working time length and working junction temperature, and determine the working time length of the lamp at the standard junction temperature matching the current illuminance as the standard working time length according to the light decay curve of the lamp.

6. The lamp life prediction device according to claim 5, characterized in that The first determination module calculates the working junction temperature of the lamp by the following formula: ； ； Wherein, TJ represents the working junction temperature of the lamp, TA represents the working environment temperature, PD represents the power consumption of the lamp, RJA represents the thermal resistance value of the lamp, VF represents the forward voltage drop of the lamp, and IF represents the working current of the lamp.

7. A computer readable storage medium characterized in that, The computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by the processor to implement the lamp life prediction method according to any one of claims 1-4.

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