CN111083848B - Overload protection method, device, equipment and medium for automobile LED lamp - Google Patents
Overload protection method, device, equipment and medium for automobile LED lamp Download PDFInfo
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- CN111083848B CN111083848B CN201911419997.3A CN201911419997A CN111083848B CN 111083848 B CN111083848 B CN 111083848B CN 201911419997 A CN201911419997 A CN 201911419997A CN 111083848 B CN111083848 B CN 111083848B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The application relates to an overload protection method, device, equipment and medium for an automobile LED lamp, wherein the method comprises the following steps: acquiring an output voltage value of a constant current driving module of an automobile LED lamp; acquiring an output power value of the constant current driving module based on the output voltage value; and controlling and adjusting the output current value of the constant current driving module according to the output power value, and adjusting the output power value to a preset safety threshold range. When the overload protection is played to the automobile LED lamp, the constant current driving module of the automobile LED lamp is controlled to maintain certain load current output, and the output current value of the constant current driving module is adjusted, so that the output power value is reduced to a preset safety threshold range, and the overheating damage of circuit components is avoided.
Description
Technical Field
The application relates to the technical field of car lamp control, in particular to an overload protection method, device, equipment and medium for an automobile LED lamp.
Background
LED light sources are widely used in automotive LED lamps, into which driving modules for various LED loads are also installed. An automotive LED lamp control system needs to control the output current of its load according to its actual operating requirements to match its normal operating power requirements.
However, in the conventional automobile lamp control system, the load temperature is detected by the thermistor, and the method for performing overheat protection by controlling and shutting down the system output through the load temperature value detected by the thermistor has difficulty in meeting the user's desire that the vehicle can maintain a certain power output during the overheat protection process. In general, since a functional damage that is difficult to recover is easily caused when a vehicle is operated at a high temperature, how to maintain a constant power output in the process of overheat protection of the vehicle becomes one of the technical problems that must be solved.
Disclosure of Invention
In view of the above, it is necessary to provide a method, an apparatus, a device and a medium for overload protection of an automotive LED lamp, which can maintain a certain load current output during the process of performing overheat protection and can avoid the overheat damage of circuit components.
One aspect of the application provides an overload protection method for an automotive LED lamp, which includes:
acquiring an output voltage value of a constant current driving module of an automobile LED lamp;
acquiring an output power value of the constant current driving module based on the output voltage value;
and controlling and adjusting the output current value of the constant current driving module according to the output power value, and adjusting the output power value to a preset safety threshold range.
In the overload protection method for the automobile LED lamp in the above embodiment, the output voltage value of the constant current driving module of the automobile LED lamp is obtained, the output power value of the constant current driving module is calculated according to the output current value of the constant current driving module and the output voltage value, the output current value of the constant current driving module is controlled and adjusted according to the output power value, the output power value is adjusted to the preset safety threshold range, and then the output power value is adjusted to the preset safety threshold range, so that the overload protection is performed on the automobile LED lamp, and simultaneously, the constant current driving module of the automobile LED lamp is controlled to maintain a certain load current output.
In one embodiment, the obtaining of the output voltage value of the constant current driving module of the automotive LED lamp includes:
and acquiring the output voltage value of the constant current driving module of the automobile LED lamp based on the thermosensitive sensing module.
In the overload protection method for the automobile LED lamp in the embodiment, the power output by the constant current driving module of the automobile LED lamp is converted into a voltage value which is easy to identify by a controller through the arrangement of the heat-sensitive sensing module, and the output current value of the constant current driving module of the automobile LED lamp is constant, so that the output power value of the constant current driving module of the automobile LED lamp can be obtained by obtaining the output voltage value of the constant current driving module of the automobile LED lamp, the overload protection method for the automobile LED lamp is conveniently controlled according to the obtained output power value, the output power value is reduced to a preset safety threshold range, and the overheat damage of circuit components is avoided.
In one embodiment, the overload protection method for the automobile LED lamp further comprises the following steps:
and filtering the output of the thermosensitive sensing module through a filter to reduce the interference of external noise.
In one embodiment, the filter is a low-pass filter to reduce interference of external high-frequency noise.
In one embodiment, the controlling and adjusting the output current value of the constant current driving module according to the output power value includes:
and when the output power value exceeds the safety threshold range, controlling to reduce the output current value to a first safety value.
In the overload protection method for the automobile LED lamp in the above embodiment, when it is detected that the output power exceeds the preset safety threshold range, for example, the rated power safety range, which indicates that the automobile LED lamp is in the overload working state, the output current value is reduced to the first safety value by controlling to reduce the output power value of the constant current driving module to the safety range, so as to prevent the automobile LED lamp from damaging circuit components or reducing the service life of the automobile LED lamp due to the overhigh working temperature caused by the overload for a long time.
In one embodiment, the overload protection method for the automobile LED lamp further includes:
and when the output power value exceeds the safety threshold range, controlling an alarm device to send out an alarm signal.
In the overload protection method for the automobile LED lamp in the embodiment, when the output power value is detected to exceed the safety threshold range, the alarm device is controlled to send out an alarm signal to remind a user of detecting that the automobile LED lamp works in an overload mode, and the user pays attention to checking of the automobile to eliminate related potential safety hazards.
In one embodiment, the overload protection method for the automobile LED lamp further includes:
after the output current value is reduced to a first safety value through the control, when the output power value exceeds the safety threshold range, the output current value is reduced to a second safety value through the control, and the second safety value is smaller than the first safety value.
In the overload protection method for the automotive LED lamp in the above embodiment, after the output current value is controlled to be reduced to the first safety value, when it is detected that the output power exceeds a preset safety threshold range, for example, a rated power safety range, the output current value is controlled to be reduced to a second safety value, where the second safety value is smaller than the first safety value, the output current value is controlled to be reduced from the first safety value to the second safety value, so as to reduce the output power value of the constant current driving module to the safety range, thereby preventing the automotive LED lamp from damaging circuit components or reducing the service life of the automotive LED lamp due to an overhigh working temperature caused by long-time overload.
In one embodiment, the overload protection method for the automobile LED lamp further includes:
after the output current value is reduced to a second safety value through the control, when the output power value exceeds the safety threshold range, the output current value is reduced to a third safety value through the control, and the third safety value is smaller than the second safety value.
In the overload protection method for the automobile LED lamp in the above embodiment, after the output current value is controlled to be reduced to the second safety value, when it is detected that the output power exceeds a preset safety threshold range, for example, a rated power safety range, the output current value is controlled to be reduced to a third safety value, where the third safety value is smaller than the second safety value, the output current value is controlled to be reduced from the second safety value to the third safety value, so as to reduce the output power value of the constant current driving module to the safety range, thereby preventing the automobile LED lamp from damaging circuit components or reducing the service life of the automobile LED lamp due to an overhigh working temperature caused by long-time overload.
In one embodiment, the overload protection method for the automobile LED lamp further includes:
after the output current value is controlled to be reduced to a third safety value, when the output power value exceeds the safety threshold range, the output current value is controlled to be reduced to a fourth safety value, and the fourth safety value is smaller than the third safety value.
In the overload protection method for the automobile LED lamp in the above embodiment, after the output current value is controlled to be reduced to the third safety value, when it is detected that the output power exceeds a preset safety threshold range, for example, a rated power safety range, the output current value is controlled to be reduced to a fourth safety value, where the fourth safety value is smaller than the third safety value, the output current value is controlled to be reduced from the third safety value to the fourth safety value, so as to reduce the output power value of the constant current driving module to the safety range, thereby preventing the automobile LED lamp from damaging circuit components or reducing the service life of the automobile LED lamp due to an overhigh working temperature caused by long-time overload.
One aspect of the application provides a car LED lamp overload protection device, includes:
the output voltage value acquisition module is used for acquiring the output voltage value of the constant current driving module of the automobile LED lamp;
and the control module is used for acquiring the output power value of the constant current driving module based on the output voltage value, controlling and adjusting the output current value of the constant current driving module according to the output power value, and adjusting the output power value to a preset safety threshold range.
In one embodiment, the output voltage value obtaining module includes:
and the heat-sensitive sensing module is connected with the control module and is used for acquiring the output voltage value of the constant current driving module of the automobile LED lamp.
In one embodiment, the overload protection device for the automotive LED lamp further comprises:
and the filter is connected between the controller and the thermosensitive sensing module in series and is used for filtering the output of the thermosensitive sensing module so as to reduce the interference of external noise.
In one embodiment, the overload protection device for the automobile LED lamp further comprises an alarm device, configured to send an alarm signal based on the control of the control module when the output power value exceeds the safety threshold range.
In the overload protection device for the automobile LED lamp in the above embodiment, when it is detected that the output power value exceeds the safety threshold range, the alarm device is controlled to send an alarm signal to remind a user of detecting that the automobile LED lamp is overloaded to work, and the user pays attention to checking the automobile to eliminate related potential safety hazards.
An aspect of the present application provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method described in any of the embodiments of the present application when executing the computer program.
Another aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of any of the methods described in the embodiments of the present application.
In the computer device or the computer-readable storage medium in the above embodiment, the output voltage value of the constant current driving module of the automotive LED lamp is obtained, the output power value of the constant current driving module is calculated according to the output current value of the constant current driving module and the output voltage value, the output current value of the constant current driving module is controlled and adjusted according to the output power value, the output power value is adjusted to the preset safety threshold range, and then the output power value is adjusted to the preset safety threshold range.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain drawings of other embodiments based on these drawings without any creative effort.
Fig. 1 is an application scenario diagram of an overload protection method for an automotive LED lamp provided in a first embodiment of the present application.
Fig. 2 is a schematic flow chart of an overload protection method for an automotive LED lamp provided in a second embodiment of the present application.
Fig. 3 is a schematic flow chart of an overload protection method for an automotive LED lamp provided in a third embodiment of the present application.
Fig. 4 is a schematic flow chart of an overload protection method for an automotive LED lamp provided in a fourth embodiment of the present application.
Fig. 5 is a schematic flowchart of an overload protection method for an automotive LED lamp provided in a fifth embodiment of the present application.
Fig. 6 is a schematic flow chart of an overload protection method for an automotive LED lamp provided in a sixth embodiment of the present application.
Fig. 7 is a block diagram of an overload protection apparatus for an automotive LED lamp according to a seventh embodiment of the present application.
Fig. 8 is a block diagram of an overload protection apparatus for an automotive LED lamp according to an eighth embodiment of the present application.
Fig. 9 is a block diagram of an overload protection apparatus for an automotive LED lamp according to a ninth embodiment of the present application.
Fig. 10 is a block diagram of an overload protection apparatus for an automotive LED lamp according to a tenth embodiment of the present application.
Fig. 11 is a block diagram of an overload protection apparatus for an automotive LED lamp according to an eleventh embodiment of the present application.
Fig. 12 is an internal structural diagram of a computer device provided in an embodiment of the present application.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.
In one embodiment of the application, the method for overload protection of the automotive LED lamp can be applied to the application environment shown in fig. 1. The first terminal 102 communicates with the in-vehicle computer 104 via a network. Specifically, the first terminal 102 may display an input interface of the overload protection method for the automotive LED lamp, for example, by inputting a preset safety threshold range value on the input interface, and may be in a selective input manner, for example, selecting and determining the preset safety threshold range value. The first terminal starts overload protection on the automobile LED lamp according to a safety threshold value range value provided by a user or defaulted by a system. The first terminal 102 may be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, vehicle-mounted computers, and portable wearable devices. It should be noted that the first terminal 102 in this embodiment communicates with the in-vehicle computer 104 via a network. The user can obtain the output voltage value of the constant current driving module of the automobile LED lamp and the output power value of the constant current driving module through the first terminal 102.
Further, in an embodiment of the present application, as shown in fig. 2, there is provided a method for overload protection of an automotive LED lamp, which is described by taking the method as an example for being applied to the first terminal in fig. 1, and includes the following steps:
and step 202, acquiring an output voltage value of the constant current driving module of the automobile LED lamp.
The output voltage value of the constant current driving module of the automobile LED lamp can be detected directly by connecting a voltmeter in parallel at the output load end of the constant current driving module of the automobile LED lamp, and the output voltage value of the constant current driving module of the automobile LED lamp can also be obtained by other indirect methods such as obtaining the resistance value of an equivalent resistor output by the constant current driving module of the automobile LED lamp and multiplying the resistance value by the current value output by the constant current driving module of the automobile LED lamp.
And 204, acquiring an output power value of the constant current driving module based on the output voltage value.
And calculating the output power value of the constant current driving module of the automobile LED lamp according to the obtained output voltage value U of the constant current driving module of the automobile LED lamp and the output current value I of the constant current driving module of the automobile LED lamp and a formula U I.
And step 206, controlling and adjusting the output current value of the constant current driving module according to the output power value, and adjusting the output power value to a preset safety threshold range.
A preset safety threshold range can be set, and if the acquired output power value of the constant current driving module is larger than the preset safety threshold range, the overload operation of the automobile LED lamp is indicated. If the automobile LED lamp works in an overload mode for a long time, overheating can be caused, the service life of the automobile LED lamp is shortened, circuit elements can be seriously damaged, and other serious results can be even caused. Therefore, if the obtained output power value of the constant current driving module is larger than the preset safety threshold range, the output current value of the constant current driving module can be controlled to be reduced, so that the working current of the automobile LED lamp is reduced, the automobile LED lamp is safe to work, and the phenomenon that the automobile LED lamp is overloaded to work for a long time is avoided.
In the overload protection method for the automobile LED lamp in the above embodiment, the output voltage value of the constant current driving module of the automobile LED lamp is obtained, the output power value of the constant current driving module is calculated according to the output current value of the constant current driving module and the output voltage value, the output current value of the constant current driving module is controlled and adjusted according to the output power value, the output power value is adjusted to the preset safety threshold range, and then the output power value is adjusted to the preset safety threshold range, so that the overload protection is performed on the automobile LED lamp, and simultaneously, the constant current driving module of the automobile LED lamp is controlled to maintain a certain load current output.
In an embodiment of the present application, as shown in fig. 3, an overload protection method for an automotive LED lamp is provided, which is described by taking an example that the method is applied to a first terminal in fig. 1, where the obtaining an output voltage value of an automotive LED lamp constant current driving module includes:
A thermosensitive sensing module can be added in the automobile LED constant current driving control module, and the thermosensitive sensing module can convert the power output by the constant current driving module into a voltage value which can be easily identified by the control module. Because the current value output by the constant current driving module is constant, the output power of the constant current driving module is in direct proportion to the output voltage. The current output power value of the constant current driving module can be identified by measuring the output voltage value of the constant current driving module of the automobile LED lamp. In this embodiment, when the constant current driving module outputs power matched with the power required by the load board, the power required by the load board is stored in the memory in the control module in the form of a calibration parameter as a reference value of the rated power, and when the control module detects that the difference between the current output power value of the constant current driving module and the reference value exceeds a preset error range, it is determined that the dimming resistance of the system is wrong, and an alarm signal can be controlled to be output, and the output current value of the constant current driving module is controlled to be reduced, so that the functional output of the automotive LED is ensured and the risk possibly caused by overload is avoided.
In the overload protection method for the automobile LED lamp in the embodiment, the power output by the constant current driving module of the automobile LED lamp is converted into a voltage value which is easy to identify by a controller through the arrangement of the heat-sensitive sensing module, and the output current value of the constant current driving module of the automobile LED lamp is constant, so that the output power value of the constant current driving module of the automobile LED lamp can be obtained by obtaining the output voltage value of the constant current driving module of the automobile LED lamp, the overload protection method for the automobile LED lamp is conveniently controlled according to the obtained output power value, the output power value is reduced to a preset safety threshold range, and the overheat damage of circuit components is avoided.
Further, in an embodiment of the present application, there is provided an overload protection method for an automotive LED lamp, as shown in fig. 4, which is described by taking the method as an example of being applied to the first terminal in fig. 1, and the overload protection method for an automotive LED lamp further includes:
Further, in an embodiment of the present application, there is provided an overload protection method for an automotive LED lamp, as shown in fig. 5, which is described by taking the method as an example of being applied to the first terminal in fig. 1, and the overload protection method for an automotive LED lamp further includes:
Specifically, when the output power value is detected to exceed a preset safety threshold range, the output current of the constant current driving module is reduced to a first safety value, for example, 90% of the rated output current, so that the output power of the constant current driving module is reduced, and the output power value can be reduced to be within the safety threshold range within a certain time.
In the overload protection method for the automobile LED lamp in the above embodiment, when it is detected that the output power exceeds the preset safety threshold range, for example, the rated power safety range, which indicates that the automobile LED lamp is in the overload working state, the output current value is reduced to the first safety value by controlling to reduce the output power value of the constant current driving module to the safety range, so as to prevent the automobile LED lamp from damaging circuit components or reducing the service life of the automobile LED lamp due to the overhigh working temperature caused by the overload for a long time.
Further, in the overload protection method for the automotive LED lamp in the above embodiment, the method further includes:
Specifically, after step 2061 is completed, if the output power value of the constant current driving module still exceeds the safety threshold range, the output current of the constant current driving module is further reduced to a second safety value, for example, 80% of the rated output current, so as to reduce the output power of the constant current driving module, and the output power value can be reduced to the safety threshold range within a certain time.
In the overload protection method for the automotive LED lamp in the above embodiment, after the output current value is controlled to be reduced to the first safety value, when it is detected that the output power exceeds a preset safety threshold range, for example, a rated power safety range, the output current value is controlled to be reduced to a second safety value, where the second safety value is smaller than the first safety value, the output current value is controlled to be reduced from the first safety value to the second safety value, so as to reduce the output power value of the constant current driving module to the safety range, thereby preventing the automotive LED lamp from damaging circuit components or reducing the service life of the automotive LED lamp due to an overhigh working temperature caused by long-time overload.
Further, in the overload protection method for the automotive LED lamp in the above embodiment, the method further includes:
Specifically, after step 2062 is completed, if the output power value of the constant current driving module still exceeds the safety threshold range, the output current of the constant current driving module is further reduced to a third safety value, for example, 50% of the rated output current, so as to reduce the output power of the constant current driving module, and the output power value can be reduced to the safety threshold range within a certain time.
In the overload protection method for the automotive LED lamp in the above embodiment, after the output current value is controlled to be reduced to the second safety value, when it is detected that the output power exceeds a preset safety threshold range, for example, a rated power safety range, the output current value is controlled to be reduced to a third safety value, where the third safety value is smaller than the second safety value, the output current value is controlled to be reduced from the second safety value to the third safety value, so as to reduce the output power value of the constant current driving module to the safety range, thereby preventing the automotive LED lamp from being overloaded for a long time and having an excessively high working temperature, which damages circuit components or reduces the service life of the automotive LED lamp.
Further, in the overload protection method for the automotive LED lamp in the above embodiment, the method further includes:
Specifically, after step 2063 is completed, if the output power value of the constant current driving module still exceeds the safety threshold range, the output current of the constant current driving module is further reduced to a fourth safety value, for example, 10% of the rated output current, so as to reduce the output power of the constant current driving module, and the output power value can be reduced to the safety threshold range within a certain time.
In the overload protection method for the automobile LED lamp in the above embodiment, after the output current value is controlled to be reduced to the third safety value, when it is detected that the output power exceeds a preset safety threshold range, for example, a rated power safety range, the output current value is controlled to be reduced to a fourth safety value, where the fourth safety value is smaller than the third safety value, the output current value is controlled to be reduced from the third safety value to the fourth safety value, so as to reduce the output power value of the constant current driving module to the safety range, thereby preventing the automobile LED lamp from damaging circuit components or reducing the service life of the automobile LED lamp due to an overhigh working temperature caused by long-time overload.
Further, in an embodiment of the present application, there is provided an overload protection method for an automotive LED lamp, as shown in fig. 6, which is described by taking the method as an example of being applied to the first terminal in fig. 1, and the overload protection method for an automotive LED lamp further includes:
and step 207, controlling an alarm device to send out an alarm signal when the output power value exceeds the safety threshold range.
In the overload protection method for the automobile LED lamp in the embodiment, when the output power value is detected to exceed the safety threshold range, the alarm device is controlled to send out an alarm signal to remind a user of detecting that the automobile LED lamp works in an overload mode, and the user pays attention to checking of the automobile to eliminate related potential safety hazards.
It should be understood that although the various steps in the flow charts of fig. 2-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-6 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment of the present application, as shown in fig. 7, there is provided an overload protection device for an automotive LED lamp, including: an output voltage value obtaining module 20 and a control module 40, wherein:
the output voltage value acquisition module 20 is used for acquiring an output voltage value of the constant current driving module of the automobile LED lamp;
and the control module 40 is configured to obtain an output power value of the constant current driving module based on the output voltage value, control and adjust the output current value of the constant current driving module according to the output power value, and adjust the output power value to a preset safety threshold range.
Specifically, the output voltage value of the constant current driving module of the automobile LED lamp can be detected directly by connecting a voltmeter in parallel at the output load end of the constant current driving module of the automobile LED lamp, or can be obtained by other indirect methods, such as obtaining the resistance value of an equivalent resistor output by the constant current driving module of the automobile LED lamp, and multiplying the resistance value by the current value output by the constant current driving module of the automobile LED lamp. And calculating the output power value of the constant current driving module of the automobile LED lamp according to the obtained output voltage value U of the constant current driving module of the automobile LED lamp and the output current value I of the constant current driving module of the automobile LED lamp and a formula U I. A preset safety threshold range can be set, and if the acquired output power value of the constant current driving module is larger than the preset safety threshold range, the overload operation of the automobile LED lamp is indicated. If the automobile LED lamp works in an overload mode for a long time, overheating can be caused, the service life of the automobile LED lamp is shortened, circuit elements can be seriously damaged, and other serious results can be even caused. Therefore, if the obtained output power value of the constant current driving module is larger than the preset safety threshold range, the output current value of the constant current driving module can be controlled to be reduced, so that the working current of the automobile LED lamp is reduced, the automobile LED lamp is safe to work, and the phenomenon that the automobile LED lamp is overloaded to work for a long time is avoided.
In an embodiment of the application, as shown in fig. 8, an overload protection device for an automotive LED lamp is provided, in which an output voltage value obtaining module 20 includes a thermosensitive sensing module 21, and the thermosensitive sensing module 21 is connected to a control module 40 and is used for obtaining an output voltage value of a constant current driving module of the automotive LED lamp.
In one embodiment of the present application, as shown in fig. 9, there is provided an overload protection device for an automotive LED lamp, wherein an output voltage value obtaining module 20 includes a thermal sensing module 21 and a filter 22, and the filter 22 is connected in series between a control module 40 and the thermal sensing module 21 and is used for filtering the output of the thermal sensing module 21 to avoid the interference of external noise. In the embodiment, by setting the dimming resistance module 12 to control and adjust the driving current value of the automotive LED lamp, the control module 40 may control the constant current driving module 10 to output a suitable driving power to match the working requirement of the automotive LED lamp 11 based on the dimming resistance value of the dimming resistance module 12.
Further, in the overload protection device for the automotive LED lamp provided in an embodiment of the present application, as shown in fig. 10, an alarm device 50 connected to the control module 40 is further included, and when the dimming resistance value of the dimming resistance module 12 cannot match the power requirement of the automotive LED lamp 11, the control module 40 may control the constant current driving module 10 to output power beyond the normal operating range of the automotive LED lamp 11. When the control module 40 detects that the output power value of the constant current driving module 10 exceeds the preset safety threshold range, the control module controls the alarm device 50 to send an alarm signal to remind a user of detecting that the automobile LED lamp works in an overload state, and paying attention to checking vehicles to eliminate related potential safety hazards.
Further, in the overload protection apparatus for an automotive LED lamp provided in an embodiment of the present application, as shown in fig. 11, the filter is a low-pass filter, and includes a resistor R1 connected in series between the control module 40 and the thermal sensing module 21, and a capacitor C1 connected in parallel between the input end and the output end of the output voltage value obtaining module 20, and is used for filtering the output signal of the output voltage value obtaining module 20 to remove unnecessary low-frequency components or low-frequency interference in the signal.
For specific limitations of the overload protection device for the automotive LED lamp, reference may be made to the above limitations of the overload protection method for the automotive LED lamp, and details thereof are not repeated here. In one embodiment of the present application, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 12. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method for overload protection of an automotive LED lamp. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 12 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment of the present application, there is provided a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring an output voltage value of an automobile LED lamp constant current driving module;
acquiring an output power value of the constant current driving module based on the output voltage value;
and controlling and adjusting the output current value of the constant current driving module according to the output power value, and adjusting the output power value to a preset safety threshold range.
In one embodiment of the application, the processor when executing the computer program further performs the steps of:
acquiring an output voltage value of the constant current driving module of the automobile LED lamp based on a thermosensitive sensing module;
filtering the output of the thermosensitive induction module through a filter;
acquiring an output power value of the constant current driving module based on the output voltage value;
and controlling and adjusting the output current value of the constant current driving module according to the output power value, and adjusting the output power value to a preset safety threshold range.
In one embodiment of the application, the processor when executing the computer program further performs the steps of:
acquiring an output voltage value of the constant current driving module of the automobile LED lamp based on a thermosensitive sensing module;
filtering the output of the thermosensitive induction module through a filter;
acquiring an output power value of the constant current driving module based on the output voltage value;
and when the output power value exceeds the safety threshold range, controlling to reduce the output current value to a first safety value.
In one embodiment of the application, the processor when executing the computer program further performs the steps of:
acquiring an output voltage value of the constant current driving module of the automobile LED lamp based on a thermosensitive sensing module;
filtering the output of the thermosensitive induction module through a filter;
acquiring an output power value of the constant current driving module based on the output voltage value;
when the output power value exceeds the safety threshold range, controlling to reduce the output current value to a first safety value;
after the output current value is reduced to a first safety value through the control, when the output power value exceeds the safety threshold range, the output current value is reduced to a second safety value through the control, and the second safety value is smaller than the first safety value.
In one embodiment of the application, the processor when executing the computer program further performs the steps of:
acquiring an output voltage value of the constant current driving module of the automobile LED lamp based on a thermosensitive sensing module;
filtering the output of the thermosensitive induction module through a filter;
acquiring an output power value of the constant current driving module based on the output voltage value;
when the output power value exceeds the safety threshold range, controlling to reduce the output current value to a first safety value;
after the output current value is controlled to be reduced to a first safety value, when the output power value exceeds the safety threshold range, the output current value is controlled to be reduced to a second safety value, and the second safety value is smaller than the first safety value;
after the output current value is reduced to a second safety value through the control, when the output power value exceeds the safety threshold range, the output current value is reduced to a third safety value through the control, and the third safety value is smaller than the second safety value.
In one embodiment of the application, the processor when executing the computer program further performs the steps of:
acquiring an output voltage value of the constant current driving module of the automobile LED lamp based on a thermosensitive sensing module;
filtering the output of the thermosensitive induction module through a filter;
acquiring an output power value of the constant current driving module based on the output voltage value;
when the output power value exceeds the safety threshold range, controlling to reduce the output current value to a first safety value;
after the output current value is controlled to be reduced to a first safety value, when the output power value exceeds the safety threshold range, the output current value is controlled to be reduced to a second safety value, and the second safety value is smaller than the first safety value;
after the output current value is controlled to be reduced to a second safety value, when the output power value exceeds the safety threshold range, the output current value is controlled to be reduced to a third safety value, and the third safety value is smaller than the second safety value;
after the output current value is controlled to be reduced to a third safety value, when the output power value exceeds the safety threshold range, the output current value is controlled to be reduced to a fourth safety value, and the fourth safety value is smaller than the third safety value.
In an embodiment of the application, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of:
acquiring an output voltage value of a constant current driving module of an automobile LED lamp;
acquiring an output power value of the constant current driving module based on the output voltage value;
and controlling and adjusting the output current value of the constant current driving module according to the output power value, and adjusting the output power value to a preset safety threshold range.
In one embodiment of the application, the computer program when executed by the processor further performs the steps of:
acquiring an output voltage value of the constant current driving module of the automobile LED lamp based on a thermosensitive sensing module;
filtering the output of the thermosensitive induction module through a filter;
acquiring an output power value of the constant current driving module based on the output voltage value;
and controlling and adjusting the output current value of the constant current driving module according to the output power value, and adjusting the output power value to a preset safety threshold range.
In one embodiment of the application, the computer program when executed by the processor further performs the steps of:
acquiring an output voltage value of the constant current driving module of the automobile LED lamp based on a thermosensitive sensing module;
filtering the output of the thermosensitive induction module through a filter;
acquiring an output power value of the constant current driving module based on the output voltage value;
and when the output power value exceeds the safety threshold range, controlling to reduce the output current value to a first safety value.
In one embodiment of the application, the computer program when executed by the processor further performs the steps of:
acquiring an output voltage value of the constant current driving module of the automobile LED lamp based on a thermosensitive sensing module;
filtering the output of the thermosensitive induction module through a filter;
acquiring an output power value of the constant current driving module based on the output voltage value;
when the output power value exceeds the safety threshold range, controlling to reduce the output current value to a first safety value;
after the output current value is reduced to a first safety value through the control, when the output power value exceeds the safety threshold range, the output current value is reduced to a second safety value through the control, and the second safety value is smaller than the first safety value.
In one embodiment of the application, the computer program when executed by the processor further performs the steps of:
acquiring an output voltage value of the constant current driving module of the automobile LED lamp based on a thermosensitive sensing module;
filtering the output of the thermosensitive induction module through a filter;
acquiring an output power value of the constant current driving module based on the output voltage value;
when the output power value exceeds the safety threshold range, controlling to reduce the output current value to a first safety value;
after the output current value is controlled to be reduced to a first safety value, when the output power value exceeds the safety threshold range, the output current value is controlled to be reduced to a second safety value, and the second safety value is smaller than the first safety value;
after the output current value is reduced to a second safety value through the control, when the output power value exceeds the safety threshold range, the output current value is reduced to a third safety value through the control, and the third safety value is smaller than the second safety value.
In one embodiment of the application, the computer program when executed by the processor further performs the steps of:
acquiring an output voltage value of the constant current driving module of the automobile LED lamp based on a thermosensitive sensing module;
filtering the output of the thermosensitive induction module through a filter;
acquiring an output power value of the constant current driving module based on the output voltage value;
when the output power value exceeds the safety threshold range, controlling to reduce the output current value to a first safety value;
after the output current value is controlled to be reduced to a first safety value, when the output power value exceeds the safety threshold range, the output current value is controlled to be reduced to a second safety value, and the second safety value is smaller than the first safety value;
after the output current value is controlled to be reduced to a second safety value, when the output power value exceeds the safety threshold range, the output current value is controlled to be reduced to a third safety value, and the third safety value is smaller than the second safety value;
after the output current value is controlled to be reduced to a third safety value, when the output power value exceeds the safety threshold range, the output current value is controlled to be reduced to a fourth safety value, and the fourth safety value is smaller than the third safety value.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. 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 a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (15)
1. An overload protection method for an automobile LED lamp is characterized by comprising the following steps:
acquiring an output voltage value of an automobile LED lamp constant current driving module based on a thermosensitive sensing module;
acquiring an output power value of the constant current driving module based on the output voltage value and the output current value of the constant current driving module;
controlling and adjusting the output current value of the constant current driving module to a preset safety value according to the output power value, and reducing the output power value to a preset safety threshold range; the preset safety value is related to the rated output current of the automobile LED lamp; the preset safety value comprises a first safety value, a second safety value, a third safety value and a fourth safety value which are sequentially decreased in a descending manner;
and the output current value of the constant current driving module is sequentially controlled and adjusted to the first safety value, the second safety value, the third safety value and the fourth safety value according to the output power value, so that the phenomenon that the automobile LED lamp is overloaded for a long time and the automobile body battery voltage is too low to cause the automobile LED driving overheat to damage circuit components or reduce the service life of the automobile LED lamp is avoided.
2. The method according to claim 1, wherein the obtaining of the output voltage value of the constant current driving module of the automobile LED lamp comprises:
and dynamically reducing the output current value of the constant current driving module to the preset safety value based on the dimming resistance value control of the dimming resistance module.
3. The method of claim 2, further comprising:
and filtering the output of the thermosensitive induction module through a filter.
4. The method of claim 3, wherein the filter is a low pass filter.
5. The method according to any one of claims 1 to 4, wherein the controlling and adjusting the output current value of the constant current driving module to a preset safety value according to the output power value comprises:
and when the output power value exceeds the safety threshold range, controlling to dynamically reduce the output current value to the first safety value.
6. The method of claim 5, further comprising:
and when the output power value exceeds the safety threshold range, controlling an alarm device to send out an alarm signal.
7. The method of claim 6, further comprising:
after the control dynamically reduces the output current value to the first safety value, when the output power value exceeds the safety threshold range, the control dynamically reduces the output current value to the second safety value, and the second safety value is smaller than the first safety value.
8. The method of claim 7, further comprising:
after the output current value is dynamically reduced to the second safety value by the control, when the output power value exceeds the safety threshold range, the output current value is dynamically reduced to a third safety value by the control, and the third safety value is smaller than the second safety value.
9. The method of claim 8, further comprising:
after the output current value is dynamically reduced to the third safety value by the control, when the output power value exceeds the safety threshold range, the output current value is dynamically reduced to the fourth safety value by the control, and the fourth safety value is smaller than the third safety value.
10. An overload protection device for an automobile LED lamp is characterized by comprising:
the output voltage value acquisition module is used for acquiring the output voltage value of the constant current driving module of the automobile LED lamp;
the control module is used for acquiring an output power value of the constant current driving module based on the output voltage value and the output current value of the constant current driving module, controlling and adjusting the output current value of the constant current driving module to a preset safety value according to the output power value, and reducing the output power value to a preset safety threshold range; the preset safety value is related to the rated output current of the automobile LED lamp; the preset safety value comprises a first safety value, a second safety value, a third safety value and a fourth safety value which are sequentially decreased in a descending manner;
the output voltage value acquisition module comprises a thermosensitive sensing module connected with the control module, and the thermosensitive sensing module is used for acquiring the output voltage value of the constant current driving module of the automobile LED lamp;
the control module is further used for sequentially controlling and adjusting the output current value of the constant current driving module to the first safety value, the second safety value, the third safety value and the fourth safety value according to the output power value, so that the phenomenon that the automobile LED lamp is overloaded for a long time, the working temperature is too high, the voltage of a battery of an automobile body is too low, the automobile LED is driven to be overheated, circuit components are damaged, or the service life of the automobile LED lamp is shortened is avoided.
11. The apparatus of claim 10, further comprising:
and the dimming resistance module is connected with the control module, and the control module is used for controlling the output current value of the constant current driving module to be dynamically reduced to the preset safety value based on the dimming resistance value of the dimming resistance module.
12. The apparatus of claim 11, further comprising:
and the filter is connected between the control module and the thermosensitive sensing module in series and is used for filtering the output of the thermosensitive sensing module.
13. The apparatus of any one of claims 10-12, further comprising:
and the alarm device is used for sending out an alarm signal based on the control of the control module when the output power value exceeds the safety threshold range.
14. A computer arrangement comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 9 when executing the computer program.
15. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 9.
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| CN201911419997.3A CN111083848B (en) | 2019-12-31 | 2019-12-31 | Overload protection method, device, equipment and medium for automobile LED lamp |
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